CN104820579A - Sensing system comprising mobile terminal and peripheral device and sensing method thereof - Google Patents
Sensing system comprising mobile terminal and peripheral device and sensing method thereof Download PDFInfo
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- CN104820579A CN104820579A CN201510169674.9A CN201510169674A CN104820579A CN 104820579 A CN104820579 A CN 104820579A CN 201510169674 A CN201510169674 A CN 201510169674A CN 104820579 A CN104820579 A CN 104820579A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 title abstract description 19
- 230000000737 periodic effect Effects 0.000 claims abstract description 31
- 230000005236 sound signal Effects 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 15
- 230000002463 transducing effect Effects 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 10
- 239000011551 heat transfer agent Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007476 Maximum Likelihood Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The invention discloses a sensing system comprising a mobile terminal and a peripheral device and a sensing method thereof. The mobile terminal is capable of continuous supplying power for a sensing unit through contacts of a movable connector and uninterruptedly controlling the sensing unit and receiving signals returned by the sensing unit at the same time. The sensing system comprises the mobile terminal and the peripheral device, wherein the mobile terminal comprises a user interface, a sensing application module, an audio playing module and an audio data module; the peripheral device comprises a movable connector, a power supply module, a data demodulation unit, a data modulation unit and a sensing unit; audio differential periodic waveforms are input into the power supply module of the peripheral device; the audio differential periodic waveforms carry out operation instruction by virtue of frequency change; the sensing unit is used for receiving instructions of the data demodulation unit, measuring environment parameters according to the instructions and generating sensing signals; the peripheral device is used for generating audio signals comprising sensing information and is connected to the mobile terminal by virtue of an audio input contact. According to the sensing system, the power supply efficiency is high, and the mobile terminal and the peripheral device can communicatewith each other freely.
Description
Technical field
The present invention relates to computer equipment, particularly realized the system and method for intelligent sensing by mobile terminal and external device.
Background technology
Intelligent sensor is the sensor with the information processing function.Intelligent sensor is with microprocessor, and having the ability of collection, process, exchange information, is the product that sensor integrationization combines with microprocessor.Intelligent Sensorsystem will solve the problem controlling and power.
The audio connector of computing machine (comprising mobile terminal, flat computer, personal computer) can expand peripheral product, i.e. computer peripheral device, therefore may be used for controlling sensor.Prior art comprises carries out the device of powering, controlling by audio connector to peripheral hardware, such as export square wave or sine wave by a sound channel, produce DC voltage after rectification, another sound channel transfer control signal or data are to peripheral hardware; Such as two sound channels produce square wave or sine wave flows to peripheral hardware rectification to provide electric energy in a period of time again, are used for control signal transmission in another time period.Drawback be to provide electric energy efficiency low, power supply cannot be realized simultaneously, control.The scheme that patented claim CN201310660146 discloses just have employed similar technology, in the program except there are the problems referred to above, mobile terminal can't initiatively freely communicate with peripheral hardware, but determines whether down by the packet of microphone reception peripheral hardware the number of delivering a letter; In order to wait the number of delivering a letter under mobile terminal, peripheral hardware also will be powered by Switch Controller or communication path switches.
Summary of the invention
The present invention proposes a kind of sensor-based system comprising mobile terminal and external device, and method for sensing, realize mobile terminal and continue to carry out powering to sensing unit by the contact of flexible jumper, sensing unit can be controlled simultaneously incessantly, receive the signal that sensing unit returns.
Sensor-based system of the present invention comprises mobile terminal 9 and external device.
Described external device comprises flexible jumper 1, power module 2, data demodulation unit 3, sensing unit 56.Described flexible jumper 1 comprises left and right sound channels output contact L, R, and audio frequency input contact MIC; Described power module 2 is from the difference periodic waveform of described left and right sound channels output contact audio reception.Described power module 2 processes described difference periodic waveform, produces DC voltage.Described data demodulation unit 3 carries out frequency demodulation, instruction of resuming work from described power module 2 extension tone currents.Described sensing unit 56 receives described work order, carries out environmental parameter measurement, generates transducing signal.As general approach of the present invention, described transducing signal is audio frequency, is sent to described audio frequency input contact.As another program of the present invention, described transducing signal is digital signal, and described external device comprises Data Modulation unit 4 further, and described Data Modulation unit 4 is modulated to sound signal described transducing signal, is sent to described audio frequency input contact.
Described mobile terminal 9 comprises user interface 91, Application in Sensing module 92, audio playing module 93, audio data block 94, flexible jumper left and right acoustic channels output contact, audio frequency input contact.Described user interface 91 produces sense enable signal, display heat transfer agent; Described Application in Sensing module 92 receives the sense enable signal from described user interface 91, control described audio playing module 93, receive the sound signal from flexible jumper audio frequency input contact, resolve the heat transfer agent comprised in described sound signal, output to described user interface 91; Described audio data block 94 comprises the voice data of multi-frequency; Described audio playing module 93, according to the control of described Application in Sensing module 92, calls the voice data of various frequency from described audio data block 94, sends the difference periodic waveform of audio frequency to described flexible jumper left and right acoustic channels output contact; Described difference periodic waveform carries work order by frequency change.
Method for sensing of the present invention, comprises the following steps:
Audio playing module 93 in mobile terminal 9 continues to the left and right sound channels of flexible jumper 1 the difference periodic waveform sending audio frequency;
Described power module 2 converts described difference periodic waveform to direct current, powers to described sensing unit 56;
Described mobile terminal 9, according to the operation of user interface 91 and/or described audio frequency input contact audio signal, determines work order;
Described mobile terminal 9 changes the frequency of described difference periodic waveform, sends work order to described sensing unit 56;
Described data demodulation unit 3 identifies the frequency change of described difference periodic waveform, instruction of resuming work;
Described sensing unit 56 performs work order, generates transducing signal; Sound signal is sent to described mobile terminal 9 by described audio frequency input contact.
Use apparatus and method of the present invention, sensor device can be made to obtain lasting power supply from the audio interface of mobile terminal, and when sensing unit communicates with mobile terminal, do not stop power supply, therefore power supplying efficiency is high.In addition, between mobile terminal and sensing unit, can free communication be realized, realize down passing work order simultaneously, upload the sound signal (response) comprising heat transfer agent.
Accompanying drawing explanation
Fig. 1 is the enforcement illustration of sensor-based system
Fig. 2 is another embodiment of sensor-based system
Fig. 3 is the embodiment of sensor-based system peripheral hardware part
Fig. 4 is the embodiment of power module
Fig. 5 is the embodiment of data demodulation unit
Fig. 6 is the embodiment of Data Modulation unit
The embodiment of Fig. 7 sensor-based system mobile terminal
Fig. 8 is sensing control method flow diagram
Embodiment
Below in conjunction with accompanying drawing, embodiment is described as follows.
As shown in Figure 1, sensor-based system of the present invention comprises mobile terminal 9 and external device, and described external device comprises flexible jumper 1, power module 2, data demodulation unit 3, sensing unit 56.Described flexible jumper 1 comprises left and right sound channels output contact L, R, audio frequency input contact MIC, for connecting described mobile terminal 9 and described external device; Described mobile terminal sends the difference periodic waveform of audio frequency to the power module 2 of described external device from described left and right sound channels output contact, for raising the efficiency, " difference " refers to that the waveform of left and right sound channels is mutually anti-phase; " periodic waveform " can be the forms such as sine wave, square wave, triangular wave.Described difference periodic waveform carries work order by frequency change; .Described power module 2 processes described difference periodic waveform, and processing procedure is rectification, filtering, energy storage, produces DC voltage, realizes power supply.Described data demodulation unit 3 carries out frequency demodulation, instruction of resuming work from described power module 2 extension tone currents.Described sensing unit 56 receives described work order, carries out environmental parameter measurement, generates transducing signal.As general approach of the present invention, described transducing signal is sound signal, is sent to described mobile terminal 9 from described audio frequency input contact MIC.
Such as, environmental parameter mentioned above be temperature, humidity, pressure, vibration, tension force etc. one or more; Described sensing unit 56 is including but not limited at least one such as temperature sensor, humidity sensor, vibration transducer, acceleration transducers.
In the embodiment of sensor-based system shown in Fig. 2, as the scheme that the present invention optimizes further, described transducing signal is digital signal, described external device comprises Data Modulation unit 4 further, by described Data Modulation unit 4, described transducing signal is modulated to sound signal, is sent to described mobile terminal 9 from described audio frequency input contact MIC.
In the embodiment of the peripheral hardware of sensor-based system shown in Fig. 3 part, described flexible jumper 1 is a 3.5mm standard headphone plug 11, is connected with described mobile terminal 9 by earphone socket; Described headset plug 11 has four contacts, be respectively MIC (microphone), G (), L (L channel), R (R channel).Arrangement mode is such as respectively MIC, G, L, R from right to left; Or G, MIC, R, L.
As the embodiment that the present invention optimizes further, the path in described external device between MIC and G, comprises a switch 7, also can comprise a resistance 8, when pressing switch, the DC voltage on audio contact MIC can decline, and mobile terminal detects that change in voltage starts application program.Described switch 7 also can be an electronic switch, is controlled by sensing unit 56, controls switch motion when having powered on.
As shown in Figure 4, described power module 2 comprises rectification circuit 21, filtering circuit 22, tank circuit 23.Periodic waveform from L channel L and R channel R enters described power module 2, first carries out full-wave rectification by described rectification circuit 21.The most preferred embodiment of described rectification circuit 21 is efficient full-wave rectifying circuit.The electric current that full-wave rectification exports enters described filtering circuit 22 and realizes smothing filtering; Realize stored energy through tank circuit 23 (tank circuit can be made up of electric capacity) again, make output voltage Vcc maintain a higher level, for other each unit are powered.
As one of the embodiment of the present invention program, enter described data demodulation unit 3 from described filtering circuit 22 extension tone currents.Another embodiment of the present invention program is from the input end direct extension tone currents of described power module 2 to described data demodulation unit 3 (representing as being with arrow dotted line Fig. 4).
As shown in Figure 5, data demodulation unit 3 comprises frequency-discriminating circuit 31, analog to digital conversion circuit 32.From the tone currents of filtering circuit 22 or enter described data demodulation unit 3 from the tone currents of described power module 2 input end, by the frequency change of tone currents described in described frequency-discriminating circuit 31 Real-Time Monitoring, form amplitude change signalling.Analog-digital conversion circuit as described 32 judges it is 0 or 1 according to maximum likelihood rule, and instruction of resuming work realizes the data communication between mobile terminal 9 to sensing unit 56.
Fig. 6 is the embodiment of Data Modulation unit 4.The transducing signal that described Data Modulation unit 4 produces for feeding back described sensing unit 5 to mobile terminal 9, comprises D/A converting circuit 41 and audio modulating circuit 42.In order to reduction procedure, described audio modulating circuit 42 also can use low-pass filter circuit to substitute.
Fig. 7 is the embodiment of mobile terminal 9 in sensor-based system of the present invention, and described mobile terminal 9 comprises user interface 91, Application in Sensing module 92, audio playing module 93, audio data block 94, flexible jumper left and right acoustic channels output contact, audio frequency input contact.Described user interface 91 produces sense enable signal, display heat transfer agent; Described Application in Sensing module 92 receives the sense enable signal from described user interface 91, control described audio playing module 93, receive the sound signal from flexible jumper audio frequency input contact MIC, resolve the information comprised in described sound signal, output to described user interface 91; Described audio data block 94 comprises the voice data of multi-frequency; Described audio playing module 93, according to the control of described Application in Sensing module 92, calls the voice data of characteristic frequency from described audio data block 94, and left and right sound channels output contact L, R to described flexible jumper 1 send the difference periodic waveform of audio frequency; Described difference periodic waveform carries work order by frequency change.
Fig. 8 is the process flow diagram of method for sensing, comprises following steps:
1st step: the Application in Sensing module 92 starting mobile terminal 9.Starting method has 3 kinds: 1) peripheral hardware hard reboot: described mobile terminal 6 detects switch 7 action inputting contact MIC with flexible jumper 1 audio frequency and be connected, 2) peripheral hardware response starts: described mobile terminal 6 starts after receiving audio frequency input contact audio signal; 3) soft start: started by the user interface 91 on mobile terminal 9.
2nd step: in described mobile terminal 9, Application in Sensing module 92 controls audio playing module 93, continues to left and right sound channel the difference periodic waveform sending audio frequency.The peak to peak amplitude of this differential signal and output frequency meet the requirement that power module 2 starts work, and such as wherein peak-to-peak value is 3V to the maximum, and frequency setting is within 30KHz, near 300Hz to 1KHz.Specific embodiment is the voice data of required frequency of prestoring in described mobile terminal 9, and described audio playing module 93 is called voice data as required and play respectively to left and right sound channel.
3rd step: the power module 2 be connected with described flexible jumper 1 carries out rectification, filtering to described difference periodic waveform, converts DC voltage to, powers to other circuit;
4th step: after the initialization of described sensing unit 56 completes or after performing work order, sends sound signal by audio frequency input contact MIC to described mobile terminal 9.For scheme shown in Fig. 1 ~ 2, described external device sends by described audio frequency input contact MIC the sound signal comprising heat transfer agent to described mobile terminal 9.Method has 2 kinds, 1) described sound signal is am signals, the level of Application in Sensing module 92 monitoring in real time described audio frequency input contact MIC, tell " 0 " or " 1 " according to level height, realize the synchronous of position and word according to 01 combination again, thus realize by the data communication being set to computer direction outward; 2) described sound signal is frequency variation signal, and described sensing unit 56 sends the uploading data of different rates to described mobile terminal 9, forms the sound signal of different frequency after filtering or after modulation.
5th step: the Application in Sensing module 92 in described mobile terminal 9 identifies the operation of described user interface 91 and/or inputs contact audio signal from described audio frequency, determines whether to need to send work order to described external device.
6th step: when needs send work order, described mobile terminal 9 changes the frequency that left and right sound channels exports periodic waveform.The voice data that such as pre-stored frequency is different in described mobile terminal 9, described audio playing module 93 calls described voice data as required, plays respectively to left and right sound channel.
7th step: the data demodulation unit 3 be connected with described power module 2 identifies the frequency change of the periodic waveform of left and right sound channels, instruction of resuming work.For scheme shown in Fig. 1 ~ 2, after described data demodulation unit 3 processes, generate steering logic to described sensing unit 56.
In the embodiment shown in fig. 8, the 7th step is back to the 4th step after completing.
Claims (12)
1. an external device, is characterized in that comprising flexible jumper (1), power module (2), data demodulation unit (3), sensing unit (56);
Described flexible jumper (1) comprises left and right sound channels output contact and audio frequency input contact;
Described power module (2) is from the difference periodic waveform of described left and right sound channels output contact audio reception;
Described power module (2) processes described difference periodic waveform, produces DC voltage;
Described data demodulation unit (3) carries out frequency demodulation from described power module (2) extension tone currents, instruction of resuming work;
Described sensing unit (56) receives described work order, carries out environmental parameter measurement, generates transducing signal;
Described transducing signal is sound signal, is sent to described audio frequency input contact.
2. an external device, is characterized in that, comprises flexible jumper (1), power module (2), data demodulation unit (3), Data Modulation unit (4), sensing unit (56);
Described flexible jumper (1) comprises left and right sound channels output contact and audio frequency input contact;
Described power module (2) send the difference periodic waveform of audio reception from described left and right sound channels output contact;
Described power module (2) processes described difference periodic waveform, produces DC voltage;
Described data demodulation unit (3) carries out frequency demodulation from described power module (2) extension tone currents, instruction of resuming work;
Described sensing unit (56) receives described work order, carries out environmental parameter measurement, generates transducing signal;
Described transducing signal is digital signal;
Described Data Modulation unit (4) is modulated to sound signal described transducing signal, is sent to described audio frequency input contact.
3. external device as claimed in claim 2, is characterized in that,
Described Data Modulation unit (4) comprises D/A converting circuit (41);
Described Data Modulation unit (4) also comprises audio modulating circuit (42) or low-pass filter circuit.
4. external device as described in as arbitrary in claims 1 to 3, is characterized in that,
Described flexible jumper (1) is a 3.5mm standard headphone plug (11).
5. external device as claimed in claim 4, is characterized in that,
Path in described external device between MIC and G comprises switch (7).
6. external device as described in as arbitrary in claims 1 to 3, is characterized in that,
Described power module (2) comprises rectification circuit (21), filtering circuit (22), tank circuit (23).
7. external device as described in as arbitrary in claims 1 to 3, is characterized in that,
Described data demodulation unit (3) comprises frequency-discriminating circuit (31), analog to digital conversion circuit (32);
Part tone currents from described power module (2) input end enters described data demodulation unit (3), by described frequency-discriminating circuit (31) Real-Time Monitoring frequency change, forms amplitude change signalling;
Analog-digital conversion circuit as described (32) is resumed work instruction.
8. external device as claimed in claim 6, is characterized in that,
Described data demodulation unit (3) comprises frequency-discriminating circuit (31), analog to digital conversion circuit (32);
Part tone currents from described filtering circuit (22) enters described data demodulation unit (3), by the frequency change of tone currents described in described frequency-discriminating circuit (31) Real-Time Monitoring, forms amplitude change signalling;
Analog-digital conversion circuit as described (32) is resumed work instruction.
9. a sensor-based system, comprises mobile terminal, and arbitrary external device described in claim 1 ~ 8, it is characterized in that,
Described mobile terminal (9) comprises user interface (91), Application in Sensing module (92), audio playing module (93), audio data block (94), flexible jumper left and right acoustic channels output contact, audio frequency input contact;
Described user interface (91) produces sense enable signal, display heat transfer agent;
Described Application in Sensing module (92) receives the sense enable signal from described user interface (91); Control described audio playing module (93); Receive the sound signal from flexible jumper (1) audio frequency input contact, resolve the heat transfer agent comprised in sound signal, output to described user interface (91);
Described audio data block (94) comprises the voice data of multi-frequency;
Described audio playing module (93) is according to the control of described Application in Sensing module (92), from described audio data block (94), call the voice data of various frequency, the left and right sound channels output contact to described flexible jumper (1) sends the difference periodic waveform of audio frequency;
Described difference periodic waveform carries work order by frequency change.
10. a method for sensing, for sensor-based system described in claim 9, is characterized in that, comprises the following steps:
Described audio playing module (93) continues to left and right sound channel the difference periodic waveform sending audio frequency;
Described power module (2) converts described difference periodic waveform to direct current, powers to described sensing unit (56);
Described mobile terminal (9), according to the operation of user interface (91) and/or described audio frequency input contact audio signal, determines work order;
Described mobile terminal (9) changes the frequency of described difference periodic waveform, sends work order to described sensing unit (56);
Described data demodulates end unit (3) identifies the frequency change of described difference periodic waveform, instruction of resuming work;
Described sensing unit (56) performs work order, generates transducing signal; Sound signal is sent to described mobile terminal (9) by described audio frequency input contact.
11. method for sensing as claimed in claim 10, it is characterized in that, described sound signal is am signals or frequency variation signal.
12. as arbitrary in claim 10 ~ 11 as described in method for sensing, it is characterized in that, comprise following steps further:
Described Application in Sensing module (92) is started in order to one or more methods lower:
Switch (7) action be connected with described flexible jumper (1) detected;
Receive described audio frequency input contact audio signal;
Started by user interface (91).
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| CN201510169674.9A CN104820579B (en) | 2015-04-10 | 2015-04-10 | A kind of sensor-based system and method for sensing comprising mobile terminal and peripheral device |
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