CN102389593A - Differential flow signal processing device and method - Google Patents
Differential flow signal processing device and method Download PDFInfo
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Abstract
The invention discloses a differential flow signal processing device and method, which belong to the field of signal processing. A driving signal is used as a calibrating signal for calibrating and amplifying the acquired flow signal; a phase extraction circuit converts the flow signal into a first flow digital signal and a second flow digital signal including phase information; and the flow signal is processed and calculated by a microprocessor. In the process of processing and calculating the flow signal difference by the microprocessor, if a signal instantaneous value is greater than a reference value after the first flow digital signal and the second flow digital signal are filtered by a microprocessor software, the microprocessor sends an exciting signal to an adjusting circuit, and the adjusting circuit controls and adjusts driving signal waveform output by a driving signal generator. By the device and the method, the accuracy of acquiring the flow signal is ensured, and accurate acquisition of the flow signal difference is realized by the phase extraction circuit and the microprocessor.
Description
Technical field
The present invention relates to a kind of flow signal blood processor, especially a kind of difference flow signal blood processor and method.
Background technology
The occasions such as flux modification of the measurement of ultrafiltration, many fluid pipelines in hemodialysis; Need to measure the flow difference of two-way liquid (perhaps fluid); But the flow difference measuring method of using now is to measure the flow value of different pipelines respectively; Again two flow values are compared, thereby draw flow difference.
In addition,, can not realize the processing of flow signal difference, obtain accurate flow signal difference even collected two kinds of fluidic flow signals through difference flow signal acquisition device.
Summary of the invention
The purpose of this invention is to provide a kind of difference flow signal blood processor, difference that can accurate Calculation difference flow signal; Another object of the present invention provides a kind of difference flow signal processing method, the further difference of accurate Calculation difference flow signal.
The technical scheme that the present invention adopts is such: according to an aspect of the present invention; The present invention provides a kind of difference flow signal blood processor; Comprise power-switching circuit; Be used to provide power supply; It is characterized in that: also comprise the first signal calibration amplifying circuit and secondary signal calibration amplifying circuit, phase extraction circuit, microprocessor and adjustment circuit that drive signal generator, driving power amplifying circuit, structure are identical, the outfan of wherein said drive signal generator is connected with the input of said driving signal power amplifying circuit;
The outfan of said drive signal generator is connected with the input of the said first signal calibration amplifying circuit with secondary signal calibration amplifying circuit respectively; The said first signal calibration amplifying circuit is connected with first input end, second input of said phase extraction circuit respectively with the outfan of secondary signal calibration amplifying circuit, and the outfan of said phase extraction circuit is connected with the input of said microprocessor;
Second outfan of said microprocessor is connected with the input of said adjustment circuit, and first outfan of said adjustment circuit, second outfan are connected with first input end, second input of said drive signal generator respectively;
Drive signal and send to driving power amplifying circuit amplification output, be used to control first flow signal, second flow signal by said drive signal generator;
Drive signal and send to the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit respectively as calibrating signal by said drive signal generator; The first flow signal and second flow signal input to said first signal calibration amplifying circuit and the calibration of secondary signal calibration amplifying circuit respectively, amplify; Become to comprise first flow digital signal, the second traffic figure signal of phase information by said phase extraction circuit conversion; Calculate through said microprocessor processes again, by its first outfan output flow signal difference;
Said microprocessor is in the process of handling the calculated flow rate signal difference; If said first flow digital signal, the second traffic figure signal are after said microprocessor software filtering; Sample is greater than reference value; Then said microprocessor sends pumping signal and gives said adjustment circuit, by the drive signal waveform of the said drive signal generator output of said adjustment circuit control adjustment.
First outfan of said microprocessor is connected with the input of output conversion circuit, by said output conversion circuit said first flow digital signal, the second traffic figure signal is carried out digital-to-analogue conversion and amplification.
The said first signal calibration amplifying circuit is made up of integrated amplifier OP1A, OP2A, OP2B and OP1B; Said secondary signal calibration amplifying circuit is made up of integrated amplifier OP4A, OP5A, OP5B and OP4B; Wherein said driving signal sends to the forward end of said integrated amplifier OP1A, OP4A respectively; The forward end of input integrated transporting discharging OP2A, OP5A is as calibrating signal after amplifying; And the negative-going signal of said first flow signal, second flow signal is imported the forward end of integrated transporting discharging OP2B, OP5B respectively; The negative end of input integrated transporting discharging OP2A, OP5A after amplifying; By integrated transporting discharging OP2A, OP5A said first flow signal, second flow signal are calibrated, exported to the forward end of integrated transporting discharging OP1B, OP4B, and the forward end of the forward signal of said first flow signal, second flow signal input integrated transporting discharging OP1B, OP4B; Through negative end signal and the forward end signal plus and the output after integrated transporting discharging OP1B, OP4B amplify respectively of calibration, accomplish the calibration of said first flow signal, second flow signal and amplify in said first flow signal, second flow signal.
Said phase extraction circuit is made up of the first identical branch circuit and second branch circuit, modulus conversion chip; First branch circuit is made up of bridge rectifier VB1, resistance R 97, resistance R 98, polar capacitor C16, Zener diode D8, resistance R 99, resistance R 100 and polar capacitor C17; Bridge rectifier VB1 is parallelly connected with resistance R 98, polar capacitor C16 and placed in-line Zener diode D8 and resistance R 99 through resistance R 97, and is parallelly connected with polar capacitor C17 through resistance R 100 again;
Second branch circuit is made up of bridge rectifier VB2, resistance R 108, resistance R 109, polar capacitor C53, Zener diode D9, resistance R 110, resistance R 111 and polar capacitor C54; Bridge rectifier VB2 is parallelly connected with resistance R 109, polar capacitor C53 and placed in-line Zener diode D9 and resistance R 110 through resistance R 108, and is parallelly connected with polar capacitor C54 through resistance R 111 again;
Resistance R 100 is connected with the first input end of modulus conversion chip with node between the polar capacitor C17 in first branch circuit; Resistance R 111 is connected with second input of modulus conversion chip with node between the polar capacitor C54 in second branch circuit, and the outfan of said modulus conversion chip is connected with the input of said microprocessor.
Said adjustment circuit comprises two voltage comparator integrated circuits, second a reference source module and the adjustable resistance; The wherein said second a reference source module provides reference power supply to said pair of voltage comparator integrated circuit; Second outfan of said microprocessor is connected with the first input end of said pair of voltage comparator integrated circuit; Said variable resistance is connected with second input of said pair of voltage comparator integrated circuit, and first outfan of said pair of voltage comparator integrated circuit, second outfan are connected with first input end, second input of said drive signal generator respectively.
Said output conversion circuit is made up of analog-digital chip, the first a reference source module, integrated transporting discharging OPA, OPB; The flow signal difference is amplified through said analog-digital chip, integrated transporting discharging OPA and OPB conversion; Obtain the flow signal difference of analog form, the wherein said first a reference source module provides a reference source to analog-digital chip.
According to a further aspect in the invention, the present invention provides a kind of difference flow signal processing method, may further comprise the steps:
(01) drives signal and send the amplification of driving signal power amplifying circuit to by drive signal generator; Difference flow signal acquisition device is gathered first flow signal, second flow signal under the effect of said driving signal, and the first flow signal that collects and second flow signal are transferred to the first signal calibration amplifying circuit, secondary signal calibration amplifying circuit respectively;
(02) drives signal and send the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit to as calibrating signal by drive signal generator; And the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit amplify said first flow signal, the calibration of second flow signal respectively according to said calibrating signal; Be transferred to the phase extraction circuit conversion and become to comprise the first flow digital signal and the second traffic figure signal of phase information, repeated transmission is defeated by microprocessor;
(03) said microprocessor is after to said first flow digital signal, the second traffic figure signal software filtering; Whether the detection signal instantaneous value is greater than reference value: if the reference value of being less than or equal to; The duty of then representing difference flow signal acquisition device is normal; Need not adjust the waveform of the said driving signal of drive signal generator output through the adjustment circuit, and then adjustment difference flow signal acquisition device;
(04) said microprocessor is obtained said first flow digital signal, first phase signal of the second traffic figure signal, second phase signal respectively through phase extraction algorithms; Again said first phase signal, second phase signal are calculated after through Fourier transformation, ask for the phase signal difference;
(05) said microprocessor judges whether said phase signal difference reaches stationary value: if reach stationary value then said microprocessor compares said phase signal difference and said driving signal, draw the flow signal difference and by said microprocessor output.
In said step (03) if in said microprocessor detection signal instantaneous value greater than reference value; The working state abnormal of then representing the difference flow signal; Need drive signal waveform through the output of adjustment circuit adjustment drive signal generator; Thereby adjustment difference flow signal acquisition device; Further judge that said sample is whether greater than setting value: if greater than setting value, then said microprocessor output negative incentive signal is given the adjustment circuit, adjusts the drive signal waveform that said drive signal generator exports by said adjustment circuit and changes to negative sense;
If be less than or equal to setting value; Then said microprocessor output positive incentive signal is given said adjustment circuit; The drive signal waveform waveform that increases said drive signal generator output by the adjustment of said adjustment circuit is to positive change, and wherein said setting value is represented the degree of deviation of the said first flow digital signal and the second traffic figure signal;
Whether said microprocessor detects said sample greater than reference value, then stops adjustment until being less than or equal to said reference value.
In said step (05) if in said microprocessor judge that said phase signal difference does not reach stationary value; Then through non-linear amplitude control method; Be adjusted at the parameter in the phase signal difference computational process, make that recomputating the said phase signal difference that draws reaches stationary value.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, the present invention adopts the driving signal that flow signal is calibrated, and has guaranteed the accuracy of flow signal acquisition, and has realized the exact acquisition of flow signal difference through phase extraction circuit, microprocessor;
2, in the process of microprocessor calculated flow rate signal difference; Microprocessor detects flow signal in real time and sudden change whether occurs unusually; Microprocessor in time drives signal through the adjustment of adjustment circuit when the appearance sudden change is unusual; Realize the real-time processing of flow signal acquisition process, thereby further improved the accuracy of the flow signal difference that calculates;
3, after microprocessor calculates the flow signal difference; Stability to the flow difference signal is judged; The inner parameter of adjustment microprocessor when instability comprising the various parameters that relate in calculating of flow signal difference, thereby has guaranteed the stability of flow signal difference.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a circuit frame principle figure of the present invention;
Fig. 2 is the front view of difference flow signal acquisition device;
Fig. 3 is the cutaway view of difference flow signal acquisition device along the G-G line;
Fig. 4 is the circuit diagram of power-switching circuit;
Fig. 5 is the circuit diagram of drive signal generator, signal calibration amplifying circuit and phase extraction circuit;
Fig. 6 is the circuit diagram of driving power amplifying circuit;
Fig. 7 is microprocessor circuit figure;
Fig. 8 is the circuit diagram of output conversion circuit;
Fig. 9 is the circuit diagram of adjustment circuit;
Figure 10 is a method flow diagram of the present invention;
Figure 11 is the adjustment sketch map of drive signal waveform.
The specific embodiment
Disclosed all characteristics in this description, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this description (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1; This difference flow signal blood processor comprises power-switching circuit, drive signal generator, driving power amplifying circuit, the identical in structure first signal calibration amplifying circuit and secondary signal calibration amplifying circuit, phase extraction circuit, microprocessor, adjustment circuit and output conversion circuit; Wherein the outfan of drive signal generator is connected with driving power amplifying circuit, the first signal calibration amplifying circuit and the input of secondary signal calibration amplifying circuit respectively; The first signal calibration amplifying circuit is connected with first input end, second input of phase extraction circuit respectively with the outfan of secondary signal calibration amplifying circuit; The outfan of phase extraction circuit is connected with the input of microprocessor respectively; Second outfan of microprocessor is connected with the input of adjustment circuit; First outfan of adjustment circuit, second outfan are connected with first input end, second input of drive signal generator respectively, and first outfan of microprocessor is connected with the input of output conversion circuit.
Drive signal and send to driving signal power amplifying circuit amplification output, be used to control the work of difference flow signal acquisition device, thereby gather out first flow signal, second flow signal by drive signal generator.The driving signal sends to the first signal calibration amplifying circuit by drive signal generator and secondary signal is calibrated amplifying circuit as calibrating signal; First flow signal, second flow signal are transferred to the first signal calibration amplifying circuit respectively by difference flow signal acquisition device and secondary signal calibration amplifying circuit is calibrated, amplified; Convert the first flow digital signal, the second traffic figure signal that comprise phase information respectively to by the phase extraction circuit and be transferred to microprocessor; Calculate output flow signal difference (what export this moment is digital signal) again through microprocessor processes.When needs were checked the flow signal difference of analog form, microprocessor was exported to output conversion circuit with the flow signal difference that calculates and is carried out digital-to-analogue conversion and amplification.Microprocessor is in the process of handling the calculated flow rate signal difference; If after first flow digital signal, the filtering of second traffic figure signal process microprocessor software; Sample is greater than reference value; Then microprocessor sends pumping signal and gives the adjustment circuit, and the drive signal waveform by the output of adjustment circuit control drive signal generator acts on the calibration that the signal calibration amplifying circuit is realized flow signal; Act on the driving power amplifying circuit and realize the control of difference flow signal acquisition device, guarantee accurately to gather the first flow signal and second flow signal.
An embodiment of differential signal harvester is shown in Fig. 2～3; This differential signal harvester comprises first pipeline 1, second pipeline 2, pedestal 3, first signal picker 8, secondary signal harvester 9, vibrating device 10 and signal processing apparatus 11; Wherein first pipeline 1, second pipeline 2 end that passes pedestal 3 side by side extends to the other end of pedestal 3; And this first pipeline 1, second pipeline 2 along with pedestal 3 vertical directions symmetry respectively structurally, two fluids flow into first pipeline 1, second pipeline 2 from different directions.Vibrating device 10 is made up of magnetic drive joint 12, electromagnetic driver 13 and drive signal generator 14; Wherein first pipeline 1 and second pipeline 2 are in symmetrical centre point cross fixation; Magnetic drive joint 12 is fixed on the symmetrical centre point of first pipeline 1; Electromagnetic driver 13 is sleeved on the magnetic drive joint 12, and electromagnetic driver 13 is connected with the driving power amplifying circuit through lead.In the flow signal acquisition process; Drive signal and send to the amplification of driving power amplifying circuit by drive signal generator; Be transferred to electromagnetic driver 13; Make electromagnetic driver 13 move up and down, so that magnetic drive joint 12 vibration, first signal picker 8, secondary signal harvester 9 are transferred to the signal calibration amplifying circuit with the first flow signal that collects, second flow signal respectively.Certainly, the differential signal harvester includes but not limited to said structure.
In one embodiment of the invention; Power-switching circuit is as shown in Figure 4; It converts alternating current to low-voltage DC through transformator T1, bridge rectifier VB3, more respectively through voltage stabilizing chip U4, U5 output+5V and-power supply of 5V, offer each assembly of this device.
Shown in Fig. 5～9; The first signal calibration amplifying circuit is made up of integrated transporting discharging OP1A, OP2A, OP2B and OP1B; Secondary signal calibration amplifying circuit is made up of integrated transporting discharging OP4A, OP5A, OP5B and OP4B; The outfan difference output drive signal of drive signal generator U7 is given the forward end of integrated transporting discharging OP1A, OP4A; The forward end of input integrated transporting discharging OP2A, OP5A is as calibrating signal after amplifying; And the negative end signal of first flow signal, second flow signal is imported the forward end of integrated transporting discharging OP2B, OP5B respectively, and the negative end of input integrated transporting discharging OP2A, OP5A is calibrated first flow signal, second flow signal by integrated transporting discharging OP2A, OP5A after amplifying; Export to the forward end of integrated transporting discharging OP1B, OP4B; And the forward end of the forward end signal of first flow signal, second flow signal input integrated transporting discharging OP1B, OP4B, in first flow signal, second flow signal through the negative end signal of calibration with the forward signal addition and amplify output through integrated transporting discharging OP1B, OP4B respectively, accomplish the calibration amplification of the first flow signal and second flow signal thus.
The phase extraction circuit is made up of the first identical branch circuit and second branch circuit, modulus conversion chip; First branch circuit is made up of bridge rectifier VB1, resistance R 97, resistance R 98, polar capacitor C16, Zener diode D8, resistance R 99, resistance R 100 and polar capacitor C17; Bridge rectifier VB1 is parallelly connected with resistance R 98, polar capacitor C16 and placed in-line Zener diode D8 and resistance R 99 through resistance R 97, and is parallelly connected with polar capacitor C17 through resistance R 100 again; Second branch circuit is made up of bridge rectifier VB2, resistance R 108, resistance R 109, polar capacitor C53, Zener diode D9, resistance R 110, resistance R 111 and polar capacitor C54; Bridge rectifier VB2 is parallelly connected with resistance R 109, polar capacitor C53 and placed in-line Zener diode D9 and resistance R 110 through resistance R 108; Parallelly connected through resistance R 111 again with polar capacitor C54; Wherein resistance R 100 is connected with the first input end (port 2) of modulus conversion chip as its outfan with node between the polar capacitor C17 in first branch circuit, and resistance R 111 is connected with second input (port one) of modulus conversion chip as its outfan with node between the polar capacitor C54 in second branch circuit.Through the first flow signal process bridge-type reorganizer VB1 of calibration amplification rectification; Process resistance R 97, resistance R 98, polar capacitor C16, Zener diode D8, resistance R 99, resistance R 100 and polar capacitor C17 obtain to comprise the first flow analogue signal of phase signal, convert the first flow digital signal to through modulus conversion chip again; Through second flow signal process bridge rectifier VB2 of calibration amplification rectification; Obtain to comprise second flow analog signals of phase signal through resistance R 108, resistance R 109, polar capacitor C53, Zener diode D9, resistance R 110, resistance R 111 and polar capacitor C54; Convert the second traffic figure signal to through modulus conversion chip again; Above-mentioned first flow digital signal and the second traffic figure signal are exported to the corresponding input of microprocessor U13 by outfan CLK port, DIN port, DOUT port and the CS port of analog-digital chip, and microprocessor U13 handles and calculates the flow signal difference and by its first outfan DB1 port, DB2 port, DB3 port and the output of DB4 port.
Because the flow signal difference of microprocessor U13 output is a digital form; In order to obtain the flow signal difference of analog form; Microprocessor U13 is transferred to output conversion circuit with the flow signal difference; Output conversion circuit is made up of analog-digital chip U2, the first a reference source module D2, integrated transporting discharging OPA, OPB; The flow signal difference is amplified through analog-digital chip U2, integrated transporting discharging OPA and OPB conversion, promptly obtains the flow signal difference of the analog form of needs, and wherein this first a reference source module D2 provides a reference source to analog-digital chip U2.Certainly, microprocessor U13 can also be connected with other change-over circuits, to convert other forms of signals such as pulse when being necessary to.
The adjustment circuit comprises two voltage comparator integrated circuit U6, the second a reference source module D3 and adjustable resistance R29, and wherein the second a reference source module D3 provides a reference source to this pair voltage comparator integrated circuit U6.The second outfan P1.5 port of microprocessor U13 is connected with the first input end Trans port of two voltage comparator integrated circuit U6; Adjustable resistance R29 is connected with second input of two voltage comparator integrated circuit U6, and the first outfan Charge1 of two voltage comparator integrated circuit U6, the second outfan Charge2 are connected with first input end port 3, the second input port one 3 of drive signal generator U7 respectively.When microprocessor processes is calculated first flow digital signal, the second traffic figure signal; If first flow digital signal, the second traffic figure signal are behind microprocessor U13 software filtering; Sample is greater than reference value; Then microprocessor sends pumping signal and gives the adjustment circuit, by the drive signal waveform of adjustment circuit control drive signal generator U7 output.The driving signal is all being brought into play in difference flow signal acquisition and processing procedure and is being acted on; In difference flow signal acquisition process, be used to drive the vibration of difference flow signal acquisition device; The accuracy of dependable flow signals collecting; In difference flow signal processing procedure, be used for the calibration of flow signal, the accuracy of dependable flow signal processing.Variable resistance R29 is used for the output of the two voltage comparator integrated circuits of manual adjustment, thereby adjustment drives signal.
The device parameters that adopts in the present embodiment is:
Drive signal generator U7 selects the accurate functional generator of the monolithic of ICL8038 model for use; The model of modulus conversion chip is the TLC2543 model; The model of microprocessor U13 is STC51, and the model of analog-digital chip is TLV5618, and the model of the first a reference source module is TL431; The model of two voltage comparator integrated circuits is LM393, and the model of the second a reference source module is TL431.
Shown in figure 10, the present invention also provides a kind of difference flow signal processing method, carries out according to following steps:
(01) drives signal and send to driving power amplifying circuit amplification output by drive signal generator U7; Control difference flow signal acquisition device is gathered first flow signal, second flow signal, and the first flow signal that collects, second flow signal are transferred to the first signal calibration amplifying circuit, secondary signal calibration amplifying circuit respectively.
(02) drives signal and send the first signal calibration amplifying circuit, secondary signal calibration amplifying circuit to as calibrating signal by drive signal generator U7; And this first signal calibration amplifying circuit, secondary signal calibration amplifying circuit amplify first flow signal, the calibration of second flow signal respectively according to this calibrating signal; Be transferred to the phase extraction circuit conversion and become to comprise first flow digital signal, the second traffic figure signal of phase information, repeated transmission is defeated by microprocessor.
(03) in the flow signal acquisition process, the flow signal that possibly exist multiple factor to cause to collect produces error, such as the foozle of each assembly in the difference flow signal acquisition device, the alignment error of each assembly etc.In order to reduce measurement error; Improve acquisition precision; Introduced the duty normal reference value whether that is used to judge difference flow signal acquisition device in this method, wherein this reference value is confirmed by the measured value and the difference between the theoretical value of difference flow signal acquisition device in the actual measurement repeatedly.Microprocessor is to above-mentioned first flow digital signal, the second traffic figure signal software filtering; And whether the sample after the detection filter is greater than reference value: if the reference value of being less than or equal to; The duty of expression difference flow signal acquisition device is normal; The error of the flow signal that measures need be through the drive signal waveform of adjustment circuit adjustment drive signal generator output within acceptable scope;
If greater than reference value; It is unusual that sudden change appears in expression traffic figure signal; The working state abnormal of difference flow signal acquisition device; Microprocessor need be adjusted the drive signal waveform of drive signal generator output through the adjustment circuit, thus adjustment difference flow signal acquisition device, and the erasure signal sudden change is unusual.To how adjusting drive signal waveform, introduced the setting value that is used to represent the degree of deviation between the first flow digital signal and the second traffic figure signal in this method, with further reduction error.Shown in figure 11, (a) be the drive signal waveform figure under the normal excitation state; (b) be drive signal waveform figure under the negative incentive signal; (c) be drive signal waveform figure under the positive incentive signal.
Microprocessor judges that further sample is whether greater than setting value: if greater than; Then microprocessor output negative incentive signal is given the adjustment circuit, and the drive signal waveform that is reduced drive signal generator output by the adjustment of adjustment circuit changes (such as moving down) to negative sense;
If the reference value of being less than or equal to, then microprocessor output positive incentive signal is given the adjustment circuit, the drive signal waveform that increases drive signal generator output by the adjustment of adjustment circuit to positive change (such as on move);
After adjustment was accomplished, whether the microprocessor sample after the detection filter once more until be less than or equal to reference value then stopped adjustment greater than reference value.
(04) microprocessor is obtained first phase signal, second phase signal through phase extraction algorithms from the first flow digital signal that comprises phase information, the second traffic figure signal; And carry out Fourier transformation; Ask for the phase signal difference; Wherein phase extraction algorithms extensively is present in the present technical research, belongs to prior art, will not tire out at this and state.
(05) whether microprocessor judges phase signal difference reaches stationary value; Promptly whether phase signal is greater than certain scope in certain hour section t, and wherein time period t and scope can be set according to practical situation oneself, if the phase signal difference reaches stationary value; Then microprocessor calculates this phase signal difference and driving signal; Ask for the flow signal difference and by microprocessor output, wherein asking for of flow signal difference is prior art, will not tire out at this and state;
If microprocessor is judged the phase signal difference and is not reached stationary value; Then pass through adaptive algorithm; The inner parameter (comprising the parameter that relates in the phase signal difference computational process) of adjustment microprocessor; Make that recomputating the phase signal difference that draws reaches stationary value, wherein adaptive algorithm is a prior art, will not tire out at this and state.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (9)
1. difference flow signal blood processor; Comprise power-switching circuit; Be used to provide power supply; It is characterized in that: also comprise the first signal calibration amplifying circuit and secondary signal calibration amplifying circuit, phase extraction circuit, microprocessor and adjustment circuit that drive signal generator, driving power amplifying circuit, structure are identical, the outfan of wherein said drive signal generator is connected with the input of said driving power amplifying circuit;
The outfan of said drive signal generator is connected with the input of the said first signal calibration amplifying circuit with secondary signal calibration amplifying circuit respectively; The said first signal calibration amplifying circuit is connected with first input end, second input of said phase extraction circuit respectively with the outfan of secondary signal calibration amplifying circuit, and the outfan of said phase extraction circuit is connected with the input of said microprocessor;
Second outfan of said microprocessor is connected with the input of said adjustment circuit, and first outfan of said adjustment circuit, second outfan are connected with first input end, second input of said drive signal generator respectively;
Drive signal and send to driving power amplifying circuit amplification output, be used to control the collection of first flow signal, second flow signal by said drive signal generator;
Drive signal and send to the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit respectively as calibrating signal by said drive signal generator; The first flow signal and second flow signal input to said first signal calibration amplifying circuit and the calibration of secondary signal calibration amplifying circuit respectively, amplify; Become to comprise first flow digital signal, the second traffic figure signal of phase information by said phase extraction circuit conversion; Calculate through said microprocessor processes again, by its first outfan output flow signal difference;
Said microprocessor is in the process of handling the calculated flow rate signal difference; If said first flow digital signal, the second traffic figure signal are after said microprocessor software filtering; Sample is greater than reference value; Then said microprocessor sends pumping signal and gives said adjustment circuit, by the drive signal waveform of the said drive signal generator output of said adjustment circuit control adjustment.
2. difference flow signal blood processor according to claim 1; It is characterized in that: first outfan of said microprocessor is connected with the input of output conversion circuit, by said output conversion circuit said first flow digital signal, the second traffic figure signal is carried out digital-to-analogue conversion and amplification.
3. difference flow signal blood processor according to claim 1; It is characterized in that: the said first signal calibration amplifying circuit is made up of integrated amplifier OP1A, OP2A, OP2B and OP1B; Said secondary signal calibration amplifying circuit is made up of integrated amplifier OP4A, OP5A, OP5B and OP4B; Wherein said driving signal sends to the forward end of said integrated amplifier OP1A, OP4A respectively; The forward end of input integrated transporting discharging OP2A, OP5A is as calibrating signal after amplifying; And the negative-going signal of said first flow signal, second flow signal is imported the forward end of integrated transporting discharging OP2B, OP5B respectively; The negative end of input integrated transporting discharging OP2A, OP5A after amplifying; By integrated transporting discharging OP2A, OP5A said first flow signal, second flow signal are calibrated, exported to the forward end of integrated transporting discharging OP1B, OP4B, and the forward end of the forward signal of said first flow signal, second flow signal input integrated transporting discharging OP1B, OP4B; Through negative-going signal and the forward signal addition and the output after integrated transporting discharging OP1B, OP4B amplify respectively of calibration, accomplish the calibration of said first flow signal, second flow signal and amplify in said first flow signal, second flow signal.
4. difference flow signal blood processor according to claim 1; It is characterized in that: said phase extraction circuit is made up of the first identical branch circuit and second branch circuit, modulus conversion chip; First branch circuit is made up of bridge rectifier VB1, resistance R 97, resistance R 98, polar capacitor C16, Zener diode D8, resistance R 99, resistance R 100 and polar capacitor C17; Bridge rectifier VB1 is parallelly connected with resistance R 98, polar capacitor C16 and placed in-line Zener diode D8 and resistance R 99 through resistance R 97, and is parallelly connected with polar capacitor C17 through resistance R 100 again;
Second branch circuit is made up of bridge rectifier VB2, resistance R 108, resistance R 109, polar capacitor C53, Zener diode D9, resistance R 110, resistance R 111 and polar capacitor C54; Bridge rectifier VB2 is parallelly connected with resistance R 109, polar capacitor C53 and placed in-line Zener diode D9 and resistance R 110 through resistance R 108, and is parallelly connected with polar capacitor C54 through resistance R 111 again;
Resistance R 100 is connected with the first input end of modulus conversion chip with node between the polar capacitor C17 in first branch circuit; Resistance R 111 is connected with second input of modulus conversion chip with node between the polar capacitor C54 in second branch circuit, and the outfan of said modulus conversion chip is connected with the input of said microprocessor.
5. difference flow signal blood processor according to claim 1; It is characterized in that: said adjustment circuit comprises two voltage comparator integrated circuits, second a reference source module and the adjustable resistance; The wherein said second a reference source module provides reference power supply to said pair of voltage comparator integrated circuit; Second outfan of said microprocessor is connected with the first input end of said pair of voltage comparator integrated circuit; Said variable resistance is connected with second input of said pair of voltage comparator integrated circuit, and first outfan of said pair of voltage comparator integrated circuit, second outfan are connected with first input end, second input of said drive signal generator respectively.
6. difference flow signal blood processor according to claim 2; It is characterized in that: said output conversion circuit is made up of analog-digital chip, the first a reference source module, integrated transporting discharging OPA, OPB; The flow signal difference is amplified through said analog-digital chip, integrated transporting discharging OPA and OPB conversion; Obtain the flow signal difference of analog form, the wherein said first a reference source module provides a reference source to said analog-digital chip.
7. difference flow signal processing method is characterized in that may further comprise the steps:
(01) drives signal and send the amplification of driving power amplifying circuit to by drive signal generator; Difference flow signal acquisition device is gathered the first flow signal and second flow signal under the effect of said driving signal, and is transferred to the first signal calibration amplifying circuit, secondary signal calibration amplifying circuit respectively;
(02) drives signal and send the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit to as calibrating signal by drive signal generator; And the said first signal calibration amplifying circuit, secondary signal calibration amplifying circuit amplify said first flow signal, the calibration of second flow signal respectively according to said calibrating signal; Be transferred to the phase extraction circuit conversion and become to comprise the first flow digital signal and the second traffic figure signal of phase information, repeated transmission is defeated by microprocessor;
(03) said microprocessor is after to said first flow digital signal, the second traffic figure signal software filtering; Whether the detection signal instantaneous value is greater than reference value: if be less than or equal to said reference value; The duty of then representing difference flow signal acquisition device is normal; Need not adjust the said drive signal waveform of drive signal generator output through the adjustment circuit, and then adjustment difference flow signal acquisition device;
(04) said microprocessor is obtained said first flow digital signal, first phase signal of the second traffic figure signal, second phase signal respectively through phase extraction algorithms; Again said first phase signal, second phase signal are calculated after through Fourier transformation, ask for the phase signal difference;
(05) said microprocessor judges whether said phase signal difference reaches stationary value: if reach stationary value then said microprocessor calculates said phase signal difference and said driving signal, draw the flow signal difference and by said microprocessor output digital signal.
8. according to the described difference flow signal of claim processing method; It is characterized in that: in said step (03) if in said microprocessor detection signal instantaneous value greater than said reference value; The working state abnormal of then representing the difference flow signal; Need drive signal waveform, thereby adjust difference flow signal acquisition device, judge that further said sample is whether greater than setting value: if greater than said setting value through the output of adjustment circuit adjustment drive signal generator; Then said microprocessor output negative incentive signal is given the adjustment circuit, and the drive signal waveform of being adjusted said drive signal generator output by said adjustment circuit changes to negative sense;
If be less than or equal to said setting value; Then said microprocessor output positive incentive signal is given said adjustment circuit; The drive signal waveform of adjusting the output of said drive signal generator by said adjustment circuit is to positive change, and wherein said setting value is represented the degree of deviation of the said first flow digital signal and the second traffic figure signal;
Whether said microprocessor detects said sample greater than said reference value, then stops adjustment until being less than or equal to said reference value.
9. according to the described difference flow signal of claim processing method; It is characterized in that: in said step (05) if in said microprocessor judge that said phase signal difference does not reach stationary value; Then through non-linear amplitude control method; Be adjusted at the parameter in the phase signal difference computational process, make that recomputating the said phase signal difference that draws reaches stationary value.
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| CN102389593B (en) | 2013-12-25 |
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Address after: Science and technology building, No. 5 South mercury 401121 northern New District of Chongqing municipality Mount Huangshan Avenue 5 floor Patentee after: Chongqing Australia Chiron medical Polytron Technologies Inc Address before: 401121 New District of Chongqing City High Tech Park, Mount Huangshan Jiangbei District North Road No. 5 south building, 5F mercury B Patentee before: Chongqing Oakland Medical Equipment Research Co., Ltd. |
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