WO2014055042A1 - Wireless and batteryless module for detecting operating mode of electric devices - Google Patents

Wireless and batteryless module for detecting operating mode of electric devices Download PDF

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Publication number
WO2014055042A1
WO2014055042A1 PCT/SI2013/000058 SI2013000058W WO2014055042A1 WO 2014055042 A1 WO2014055042 A1 WO 2014055042A1 SI 2013000058 W SI2013000058 W SI 2013000058W WO 2014055042 A1 WO2014055042 A1 WO 2014055042A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
wireless
batteryless
circuit
protection
Prior art date
Application number
PCT/SI2013/000058
Other languages
French (fr)
Inventor
Marko BOKAL
Jožef SMRKOLJ
Boštjan YESHE JEVŠENAK
Original Assignee
Strip's D.O.O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SI201200295A external-priority patent/SI24212A/en
Priority claimed from SI201300303A external-priority patent/SI24521A/en
Application filed by Strip's D.O.O. filed Critical Strip's D.O.O.
Publication of WO2014055042A1 publication Critical patent/WO2014055042A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167—Circuits for remote indication
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault

Definitions

  • the object of the invention is a wireless and batteryless module for detecting the operating status of electric devices that enables monitoring the status of functioning devices through installation.
  • the module of the invention is designed on data collection (voltage drop, current size, temperature, moisture, etc.), preferably of voltage drop on an installation protection means and allows detecting a change (disconnection or other changes) and identification where or on which means a change has occurred (disconnection or other changes); the module further allows monitoring of operation of a monitored device (a monitored device is a device connected in an electric circuit protected by the installation protection means) as a wireless signal can transmit various measuring results and by applying RFID communication the module presents an efficient and financially acceptable solution to monitoring the operating status of electric devices.
  • the technical problem successfully solved by the present wireless and batteryless module for detecting the operating status of electric devices of the invention is to provide simple monitoring of an electric device, without considerably modifying the monitored device. Monitoring is meant in terms of device's consumption or functioning and by adding adequate elements also influencing the operation of the device as such.
  • the wireless and batteryless module for detecting the operating status of electric devices of the invention is meant for the operation in the so-called smart grids.
  • Document WO2005/101604 principally discloses a solution, where a protection device making up a circuit breaker would have wireless communication to a localized computerized device. Through this connection, electric quantities, setting parameters of protection function or diagnostics of system, circuit breaker or protection device as such can be transferred.
  • the embodiment does not mention batteryless power supply and does not precisely define data collection and mechanical solutions, wherein everything is supposed to be integrated in one single circuit breaker/relay.
  • Document EP 1975967 discloses a switching device or a protection device being in wireless communication with the monitored device, e.g. for a motor. Wireless communication is used to operate a switch and also to collect information on the status of a load.
  • the embodiment does not solve batteryless power supply through communication but comprises supply from the main circuit (series connection and includes galvanically separated inductive or capacitive connection to the main circuit).
  • Document WO2011/118007 discloses an embodiment of protection of data transmission to a collection unit.
  • the data on the status of a solar generator (power and effective consumption) are transmitted for a more complex processing in a server or monitoring centre.
  • This solution does not include a batteryless concept either and does not mention any protection device.
  • Document US2006/0190198 discloses a solution that solves the technical problem of obtaining individual electric information from each electric apparatus by measuring its properties (power, voltage, current, moisture) regardless of its location.
  • the monitoring/transmission apparatus includes A/D conversion units for performing conversion and a processor for computations.
  • the described invention focuses especially on signal processing and does not go into a technical implementation how such data are to be obtained/measured.
  • a voltage sensor, a current sensor and a temperature sensor are mentioned, all of them being arranged in the proximity of the apparatus, the consumption analysis of which is to be monitored. This is a very huge and powerful system that differs from our invention especially in the size and price.
  • Patent documents JP2003050620 and US2006/0176630 disclose an equipment monitoring system capable of operating wireless data communication between a monitoring unit and mobile equipment.
  • the monitoring unit collects data from the device, on which it is mounted, and converts the data into digital data.
  • the mobile terminal is dedicated to collecting data from the monitoring units. Again, this is a general role only protecting transmission of information.
  • Document US2006/0176630 further includes a monitoring device in electronic communication with the circuit breaker and a receiving device located separately from the monitoring device.
  • the monitoring device receives data from the circuit breaker (one or more phase currents measured from a grid which the circuit breaker protects, measurement of ambient temperature within the circuit breaker, and measurement of data relating to a trip condition of the circuit breaker) and transmits them wirelessly.
  • the monitoring device is arranged directly on the installation circuit breaker.
  • This solution differs from that of the present invention in terms of power supply as well.
  • the module gets power supply from the circuit breaker when the latter is in a »closed « state, and from a rechargeable battery when the circuit breaker is in an »open « state, which means that the supply circuit is series connected.
  • the purpose of the device from this document is monitoring operation of the circuit breaker (its current, temperature and status in case of disconnection), whereas our invention allows especially monitoring the status of a load, i. e. qualitative and monitoring system.
  • Patent document WO2011/103593 discloses a solution to measuring energy consumption, more specifically measuring electricity through an individual circuit breaker, and refers to an electric device with a noninvasive and self-supplying sensor for the measurement of electric current through a main circuit (it can also be a power line through a circuit breaker).
  • a main circuit it can also be a power line through a circuit breaker.
  • the sensor equipped circuit breaker Upon changing the load of a wall outlet for instance, the sensor equipped circuit breaker provides an indication of such power (current consumption) change to the user.
  • the data can also be collected in a central server for subsequent use.
  • the main difference is that the self-supplying sensor is supplied from the main circuit and not from an RF signal, through which the data are transmitted.
  • the solution of our invention functions also when the main circuit is not supplied or when there is no current (defect load, circuit breaker in »open « position, ).
  • Our invention makes it possible to measure the current in every moment (although OA) and we have information on the operating status of devices protected by the sensor equipped circuit breaker.
  • a wireless and batteryless module A,B for detecting the operating status of electric devices of the invention which is connected to an installation protection means C can in its simplified embodiment as module A only detect functioning and/or interruption of functioning of the protection means C, whereas in a more sophisticated embodiment as module B monitoring of parameters of a monitored device D can be performed and its functioning can be influenced as well.
  • Figure 1 shows a block diagramme of connection of a wireless and batteryless module A,B for detecting the operating status of electric devices D of the invention
  • FIG. 2 shows a variant of a wireless and batteryless module of the invention as module A;
  • FIG. 3 shows a variant of a wireless and batteryless module of the invention as module B;
  • Figure 4 shows a variant of module B for connection with an actuator equipped sensor in serial connection or parallel connection.
  • the most suitable place for the arrangement of a wireless and batteryless module A,B for detecting the operating status of electric devices D of the invention is a distribution box on each single protection means C (fuse, circuit breaker, switch, etc.).
  • two groups can be distinguished when integrating the module A,B of the invention, namely one for the needs of smart protection installation devices (circuit breakers and fuses) and another as an additional independent device.
  • an adequate multipurpose smart module of the invention can be integrated in an individual protection device during production in a factory.
  • the module can be embodied as an additional independent device and can be connected to an inlet or outlet side of the installation protection means C or to any other equivalent location that allows performance of measurements.
  • the wireless and batteryless module A,B for detecting the operating status of electric devices of the invention can be embodied as module A that performs the function of status detection (whether a fuse is disconnected or not) or as module B, through which data on the current of the protection means can be obtained, wherein module B can also be used to generate a signal for an actuator that upon our request switches the installation protection means on or off.
  • Module B is an active circuit and needs power supply, this is why there is a need for a neutral conductor or additional power supply.
  • a neutral conductor can be »replaced « by battery supply or module B can be supplied via RFID network (EM field supplies the module wirelessly, e. g. RFID-PALFI, RFID UHF, NFC) or any other equivalent means.
  • Figure 1 shows a connecting block diagram of connection of the wireless and batteryless module A,B of the invention which is connected at a terminal of the installation protection means C (circuit breaker or g
  • the wireless and 5 batteryless module A,B for detecting the operating status of electric devices of the invention can be connecteed to the installation protection means C in parallel or in series (as shown in Figure 1 with dotted lines).
  • the type and quantity of transmitted information depends on the embodiment of the module A,B of the invention.
  • Figure 2 shows an i o embodiment of the wireless and batteryless module for detecting the operating status of eiectric devices of the invention in a simpler embodiment as module A. It can be applied to detect functioning and/or interruption of functioning of a monitored protection device.
  • Module A is comprised of a circuit 2 for processing and adjusting a signal, a
  • module A 15 communication circuit 3 and a suitable transmitting antenna 4, and is connected to two terminals of the protection installation disconnection device via terminal section 1.
  • the functioning of the module A is simple as it does not require any special power supply. Power supply through a communication channel (passive RFID) is sufficient.
  • module A o
  • module A o
  • the change in voltage is transferred from the terminals of the protection means via terminal section 1.
  • This change in voltage affects via the terminal section 1 the functioning of the circuit 2.
  • This section digitalizes the signal and adapts it to a next level, i. e. communication circuit 3 which transmits a wireless signal through the adapted transmitting antenna 4. Through the communication circuit 3 and the transmitting antenna 4 the necessary power supply for a proper functioning of the entire circuit of Figure 2 can be obtained.
  • FIG. 3 shows an embodiment of the wireless and batteryless module for detecting the operating status of electric devices of the invention in an embodiment as module B. It can be used to monitor parameters of the monitored device and the functioning of the device can also be influenced.
  • Module B is comprised of the circuit 2 for processing and adjusting a signal, a processor 8, an amplifying high-impedance pre-amplifier 7, a drive for an actuator 6, a power supply 5, the communication circuit 3 and a suitable transmitting antenna 4.
  • the terminal section 1 in module B represents inputs for measurements, whereas a terminal section 9 represents an output for the actuator.
  • the amplifying high-impedance pre-amplifier 7 provides an adequate signal for subsequent processing. It can be used to acquire a useful signal on the installation protection means in a non-invasive way without affecting its functioning (user safety, high disruptive strength, ).
  • Power supply can be battery supply, via power supply 5 or provided through communication channels of the terminal section 9 or in any other manner for collecting energy.
  • module B When the circuit in the installation protection means is interrupted, a change in the measured quantity is detected via the terminal section 1. A change in the measured quantity can also be caused by voltage drop on the protection means, which drop depends on the current in the circuit, into which the protection means is connected. For reasons of safety and proper functioning even at disturbances the high-impedance adjusting preamplifier 7 is arranged downstream the terminal section 1. The task of processing, adjusting and sampling of the signal is performed by the circuit 2 of Figure 3.
  • the processor unit 8 provides for a coordinated functioning of this smart universal measuring principle.
  • the measured data are transmitted by said unit wirelessly through communication parts 3 and 4, and along the same path (bi-directional transmission) it also received an actuating request.
  • the actuator which can be a motor, an EM actuator and the like is controlled via terminal section 9 and the drive 6 by means of the processor 8.
  • the assembly of said parts provides for a smart monitoring of the functioning of the circuit, and if the results and analysis so demand, the circuit can also be interrupted by means of the actuator.
  • Figure 4 shows a connection of the module (module B) to a sensor 11 with an actuator 10 in serial connection. Parallel connection with the protection means C is also possible, which is shown with dotted lines.
  • the sensor 11 can be a resistor, a magnetic resistor, a Hall element, a current transformer or any other sensor for capturing electric or non-electric quantities.
  • the terminal connections of the sensor 11 allow an invasive or a non-invasive integration into the existing installation grid. The shape andthe size of terminal connections do not only enable the basic function but also fastening of the module to or at the protection means.
  • module B of the invention correspond to a simple integration into direct proximity of the installation protection means C in a simple way without any changes or modifications of the existing configuration.
  • module B The shape and the position of module B enable an adequate antenna assembly 4 of module B and the monitoring unit E, which is necessary for bi-directional communication transmission and for energy transmission from the monitoring unit to module B.
  • the amplifying high-impedance pre-amplifier 7 provides an adequate signal for subsequent processing. It can be used to acquire a useful signal on the installation protection means C in a non-invasive way without affecting its functioning (user safety, high disruptive strength, ). Upstream said pre-amplifier there are components of the circuit 2 for adjustment and filtering of a signal.
  • the signal is adequately processed and analyzed by means of the processor 8.
  • the processor is capable of recognizing a characteristic imprint from the signal (shapes of the current) and of analyzing them accordingly and of calculating them into useful information.
  • This section can store data for a definite period of time (data logging) and measured data are transmitted wirelessly through the communication part 3 with the antenna assembly 4.
  • the antenna assembly 4 is adapted to the output of the communication part 3 with impedance adjusting components 13. Through the communication module both the data are transmitted and the energy needed for the operation collected.
  • the supply circuit 5 performs harvesting and our circuit thus becomes self-supplied. A certain stock of energy is stored in an energy storage 12.
  • the processor 8 can recognize a need for switching the actuator (motor, EM actuator, etc.) on or off and is controlled via the drive 6 and the terminal section 9.
  • the assembly of said parts provides for a smart monitoring of the functioning of the circuit, and if the results and analysis so demand, the circuit can also be interrupted by means of the actuator.
  • the proposed wireless and batteryless module for detecting the operating status of electric devices of the invention and the system for monitoring the operation of installation protection means can be used to solve the problem of monitoring disconnection of these devices by way of RFID. Apart from information about the status of the protection device also ID of the device is obtained, which allows traceability from the factory through sale and to the user.
  • Another advantage of the system lies in the fact that due to RFID technology the system is wireless, which means that the installation of the monitoring system is simplified and this considerably reduces the installation costs.

Abstract

The object of the invention is a multipurpose smart module (A,B) for detecting the operating status of electric devices (D) that enables monitoring the status of functioning devices (D) through installation. The module (A,B) of the invention is designed on data collection (voltage drop, current size, temperature, moisture, etc.) on an installation protection means (C) and allows detecting a change (disconnection or other changes) and identification where or on which protection means (C) a change has occurred (disconnection or other changes); the module further allows monitoring of operation of a monitored device (D) that can wirelessly communicate with a monitoring unit (E), wherein the module (B) not only collects the data (voltage drop, current size, temperature, etc.) and indirectly measures power, it can be wirelessly remotely switched on or off.

Description

WIRELESS AND BATTERYLESS MODULE FOR DETECTING THE OPERATING STATUS OF ELECTRIC DEVICES
The object of the invention is a wireless and batteryless module for detecting the operating status of electric devices that enables monitoring the status of functioning devices through installation. The module of the invention is designed on data collection (voltage drop, current size, temperature, moisture, etc.), preferably of voltage drop on an installation protection means and allows detecting a change (disconnection or other changes) and identification where or on which means a change has occurred (disconnection or other changes); the module further allows monitoring of operation of a monitored device (a monitored device is a device connected in an electric circuit protected by the installation protection means) as a wireless signal can transmit various measuring results and by applying RFID communication the module presents an efficient and financially acceptable solution to monitoring the operating status of electric devices.
The technical problem successfully solved by the present wireless and batteryless module for detecting the operating status of electric devices of the invention is to provide simple monitoring of an electric device, without considerably modifying the monitored device. Monitoring is meant in terms of device's consumption or functioning and by adding adequate elements also influencing the operation of the device as such.
The wireless and batteryless module for detecting the operating status of electric devices of the invention is meant for the operation in the so-called smart grids. There are known solutions in the market that allow monitoring of an operating device in a way that a user arranges a monitoring device into the electric circuit as an add-on device.
Document WO2005/101604 principally discloses a solution, where a protection device making up a circuit breaker would have wireless communication to a localized computerized device. Through this connection, electric quantities, setting parameters of protection function or diagnostics of system, circuit breaker or protection device as such can be transferred. The embodiment does not mention batteryless power supply and does not precisely define data collection and mechanical solutions, wherein everything is supposed to be integrated in one single circuit breaker/relay.
Document EP 1975967 discloses a switching device or a protection device being in wireless communication with the monitored device, e.g. for a motor. Wireless communication is used to operate a switch and also to collect information on the status of a load. The embodiment does not solve batteryless power supply through communication but comprises supply from the main circuit (series connection and includes galvanically separated inductive or capacitive connection to the main circuit).
Document WO2011/118007 discloses an embodiment of protection of data transmission to a collection unit. The data on the status of a solar generator (power and effective consumption) are transmitted for a more complex processing in a server or monitoring centre. This solution does not include a batteryless concept either and does not mention any protection device.
Document US2006/0190198 discloses a solution that solves the technical problem of obtaining individual electric information from each electric apparatus by measuring its properties (power, voltage, current, moisture) regardless of its location. The monitoring/transmission apparatus includes A/D conversion units for performing conversion and a processor for computations. The described invention focuses especially on signal processing and does not go into a technical implementation how such data are to be obtained/measured. A voltage sensor, a current sensor and a temperature sensor are mentioned, all of them being arranged in the proximity of the apparatus, the consumption analysis of which is to be monitored. This is a very huge and powerful system that differs from our invention especially in the size and price.
Patent documents JP2003050620 and US2006/0176630 disclose an equipment monitoring system capable of operating wireless data communication between a monitoring unit and mobile equipment. The monitoring unit collects data from the device, on which it is mounted, and converts the data into digital data. The mobile terminal is dedicated to collecting data from the monitoring units. Again, this is a general role only protecting transmission of information. Document US2006/0176630 further includes a monitoring device in electronic communication with the circuit breaker and a receiving device located separately from the monitoring device. The monitoring device receives data from the circuit breaker (one or more phase currents measured from a grid which the circuit breaker protects, measurement of ambient temperature within the circuit breaker, and measurement of data relating to a trip condition of the circuit breaker) and transmits them wirelessly. The monitoring device is arranged directly on the installation circuit breaker. This solution differs from that of the present invention in terms of power supply as well. The module gets power supply from the circuit breaker when the latter is in a »closed« state, and from a rechargeable battery when the circuit breaker is in an »open« state, which means that the supply circuit is series connected. The purpose of the device from this document is monitoring operation of the circuit breaker (its current, temperature and status in case of disconnection), whereas our invention allows especially monitoring the status of a load, i. e. qualitative and monitoring system. Patent document WO2011/103593 discloses a solution to measuring energy consumption, more specifically measuring electricity through an individual circuit breaker, and refers to an electric device with a noninvasive and self-supplying sensor for the measurement of electric current through a main circuit (it can also be a power line through a circuit breaker). Upon changing the load of a wall outlet for instance, the sensor equipped circuit breaker provides an indication of such power (current consumption) change to the user. The data can also be collected in a central server for subsequent use. Compared to our invention, the main difference is that the self-supplying sensor is supplied from the main circuit and not from an RF signal, through which the data are transmitted. The solution of our invention functions also when the main circuit is not supplied or when there is no current (defect load, circuit breaker in »open« position, ...). Our invention makes it possible to measure the current in every moment (although OA) and we have information on the operating status of devices protected by the sensor equipped circuit breaker.
The main philosophy of smart grids is that consumption of electricity is adapted to the produced electricity and not vice versa as was the case hitherto. For this reason, electricity consumption needs to be monitored in order to prevent it from exceeding its production, because power outage would occur in this case and this can absolutely not be allowed. Apart from measuring total electricity consumption by a calibrated and certified meter, ongoing measurement of consumption (of current, power) in a circuit needs to be performed.
Conventional safety fuses or protection switches in electric devices and grids are designed in a way to break the circuit, into which they are included, in case of an extensive overload or short circuit. Herewith installations (conductors) are protected against damage, their overheating and safety threat are prevented. In this connection a problem of disconnection detection occurs, namely which part of the grid was overloaded and why. The hitherto known systems have solved detection of disconnection of installation protection devices by special controllers, by external, additional devices, integrated sensors, etc. In grids, in which tranforming stations, distribution boards etc. are integrated, installation protection means prevent further damage in case of a failure or mains crash, however it is difficult to detect the exact location and the exact installation protection device, on which disconnection occurred. Of course, there are no data available on the functioning of the grid, which are important for detecting and eliminating the problem.
A wireless and batteryless module A,B for detecting the operating status of electric devices of the invention which is connected to an installation protection means C can in its simplified embodiment as module A only detect functioning and/or interruption of functioning of the protection means C, whereas in a more sophisticated embodiment as module B monitoring of parameters of a monitored device D can be performed and its functioning can be influenced as well.
The invention will be described in more detail by way of an embodiment and figures, in which:
Figure 1 shows a block diagramme of connection of a wireless and batteryless module A,B for detecting the operating status of electric devices D of the invention;
Figure 2 shows a variant of a wireless and batteryless module of the invention as module A;
Figure 3 shows a variant of a wireless and batteryless module of the invention as module B;
Figure 4 shows a variant of module B for connection with an actuator equipped sensor in serial connection or parallel connection.
The most suitable place for the arrangement of a wireless and batteryless module A,B for detecting the operating status of electric devices D of the invention is a distribution box on each single protection means C (fuse, circuit breaker, switch, etc.).
According to the purpose, two groups can be distinguished when integrating the module A,B of the invention, namely one for the needs of smart protection installation devices (circuit breakers and fuses) and another as an additional independent device. In the first case, an adequate multipurpose smart module of the invention can be integrated in an individual protection device during production in a factory. In the second case, the module can be embodied as an additional independent device and can be connected to an inlet or outlet side of the installation protection means C or to any other equivalent location that allows performance of measurements.
In regard to functionality, the wireless and batteryless module A,B for detecting the operating status of electric devices of the invention can be embodied as module A that performs the function of status detection (whether a fuse is disconnected or not) or as module B, through which data on the current of the protection means can be obtained, wherein module B can also be used to generate a signal for an actuator that upon our request switches the installation protection means on or off. Module B is an active circuit and needs power supply, this is why there is a need for a neutral conductor or additional power supply. A neutral conductor can be »replaced« by battery supply or module B can be supplied via RFID network (EM field supplies the module wirelessly, e. g. RFID-PALFI, RFID UHF, NFC) or any other equivalent means.
Figure 1 shows a connecting block diagram of connection of the wireless and batteryless module A,B of the invention which is connected at a terminal of the installation protection means C (circuit breaker or g
protection insert) and through an integrated communication circuit transmits information on the status of the monitored electric device D via wireless connection to a monitoring unit E. As regards the type of acquired data (voltage drop, current size, temperature, etc.) the wireless and 5 batteryless module A,B for detecting the operating status of electric devices of the invention can be connecteed to the installation protection means C in parallel or in series (as shown in Figure 1 with dotted lines). The type and quantity of transmitted information depends on the embodiment of the module A,B of the invention. Figure 2 shows an i o embodiment of the wireless and batteryless module for detecting the operating status of eiectric devices of the invention in a simpler embodiment as module A. It can be applied to detect functioning and/or interruption of functioning of a monitored protection device. Module A is comprised of a circuit 2 for processing and adjusting a signal, a
15 communication circuit 3 and a suitable transmitting antenna 4, and is connected to two terminals of the protection installation disconnection device via terminal section 1. The functioning of the module A is simple as it does not require any special power supply. Power supply through a communication channel (passive RFID) is sufficient.
o The functioning of module A will be explained on a concrete embodiment.
When the protection means is interrupted due to switch-off or interruption of a protecting fuse, the change in voltage is transferred from the terminals of the protection means via terminal section 1. This change in voltage affects via the terminal section 1 the functioning of the circuit 2. This section digitalizes the signal and adapts it to a next level, i. e. communication circuit 3 which transmits a wireless signal through the adapted transmitting antenna 4. Through the communication circuit 3 and the transmitting antenna 4 the necessary power supply for a proper functioning of the entire circuit of Figure 2 can be obtained.
Figure 3 shows an embodiment of the wireless and batteryless module for detecting the operating status of electric devices of the invention in an embodiment as module B. It can be used to monitor parameters of the monitored device and the functioning of the device can also be influenced. Module B is comprised of the circuit 2 for processing and adjusting a signal, a processor 8, an amplifying high-impedance pre-amplifier 7, a drive for an actuator 6, a power supply 5, the communication circuit 3 and a suitable transmitting antenna 4. The terminal section 1 in module B represents inputs for measurements, whereas a terminal section 9 represents an output for the actuator.
The amplifying high-impedance pre-amplifier 7 provides an adequate signal for subsequent processing. It can be used to acquire a useful signal on the installation protection means in a non-invasive way without affecting its functioning (user safety, high disruptive strength, ...). Power supply can be battery supply, via power supply 5 or provided through communication channels of the terminal section 9 or in any other manner for collecting energy.
The functioning of module B will be explained on a concrete embodiment. When the circuit in the installation protection means is interrupted, a change in the measured quantity is detected via the terminal section 1. A change in the measured quantity can also be caused by voltage drop on the protection means, which drop depends on the current in the circuit, into which the protection means is connected. For reasons of safety and proper functioning even at disturbances the high-impedance adjusting preamplifier 7 is arranged downstream the terminal section 1. The task of processing, adjusting and sampling of the signal is performed by the circuit 2 of Figure 3. The processor unit 8 provides for a coordinated functioning of this smart universal measuring principle. The measured data are transmitted by said unit wirelessly through communication parts 3 and 4, and along the same path (bi-directional transmission) it also received an actuating request. The actuator, which can be a motor, an EM actuator and the like is controlled via terminal section 9 and the drive 6 by means of the processor 8. The assembly of said parts provides for a smart monitoring of the functioning of the circuit, and if the results and analysis so demand, the circuit can also be interrupted by means of the actuator. Figure 4 shows a connection of the module (module B) to a sensor 11 with an actuator 10 in serial connection. Parallel connection with the protection means C is also possible, which is shown with dotted lines. The sensor 11 can be a resistor, a magnetic resistor, a Hall element, a current transformer or any other sensor for capturing electric or non-electric quantities. The terminal connections of the sensor 11 allow an invasive or a non-invasive integration into the existing installation grid. The shape andthe size of terminal connections do not only enable the basic function but also fastening of the module to or at the protection means.
Dimensions of module B of the invention correspond to a simple integration into direct proximity of the installation protection means C in a simple way without any changes or modifications of the existing configuration.
The shape and the position of module B enable an adequate antenna assembly 4 of module B and the monitoring unit E, which is necessary for bi-directional communication transmission and for energy transmission from the monitoring unit to module B.
The amplifying high-impedance pre-amplifier 7 provides an adequate signal for subsequent processing. It can be used to acquire a useful signal on the installation protection means C in a non-invasive way without affecting its functioning (user safety, high disruptive strength, ...). Upstream said pre-amplifier there are components of the circuit 2 for adjustment and filtering of a signal. The signal is adequately processed and analyzed by means of the processor 8. The processor is capable of recognizing a characteristic imprint from the signal (shapes of the current) and of analyzing them accordingly and of calculating them into useful information. This section can store data for a definite period of time (data logging) and measured data are transmitted wirelessly through the communication part 3 with the antenna assembly 4. The antenna assembly 4 is adapted to the output of the communication part 3 with impedance adjusting components 13. Through the communication module both the data are transmitted and the energy needed for the operation collected. The supply circuit 5 performs harvesting and our circuit thus becomes self-supplied. A certain stock of energy is stored in an energy storage 12.
Based on the assessed or measured data and its own parameters (levels, alarms) the processor 8 can recognize a need for switching the actuator (motor, EM actuator, etc.) on or off and is controlled via the drive 6 and the terminal section 9. The assembly of said parts provides for a smart monitoring of the functioning of the circuit, and if the results and analysis so demand, the circuit can also be interrupted by means of the actuator. The proposed wireless and batteryless module for detecting the operating status of electric devices of the invention and the system for monitoring the operation of installation protection means can be used to solve the problem of monitoring disconnection of these devices by way of RFID. Apart from information about the status of the protection device also ID of the device is obtained, which allows traceability from the factory through sale and to the user.
Another advantage of the system lies in the fact that due to RFID technology the system is wireless, which means that the installation of the monitoring system is simplified and this considerably reduces the installation costs.

Claims

A wireless and batteryless module for detecting the operating status of electric devices that is based on collecting data on an installation protection means and allows detecting a change and identification where or on which protection device a change (disconnection or other changes) occurred
characterized in that
a module (A,B) is connected in parallel or serially to a protection installation means (C) of a monitored electric device (D) which can wirelessly communicate with a monitoring unit (E), wherein a change in a measured quantity is caused by a voltage drop in the protection means depending on the current in the circuit, in which the protection means is connected.
Wireless and batteryless module according to claim 1
characterized in that
module (A) is comprised of a circuit (2) for processing and adjusting a signal, a communication circuit (3) and a suitable transmitting antenna (4), and is connected in parallel or serially with the protection installation means (C) via terminal section (1).
Wireless and batteryless module according to claim 1
characterized in that module (B) is comprised of the circuit
(2) for processing and adjusting a signal, a processor (8), an amplifying high-impedance pre-amplifier (7), a drive for an actuator (6), a power supply (5), a communication circuit
(3) with impedance adjusting components (13), an energy storage (12) and an adequate transmitting antenna (4) and is via terminal section (1) connected to a sensor (1 ) with an actuator (10) in serial connection, in parallel connection or serially with the protection installation means (C).
4. Wireless and batteryless module according to claim 3
characterized in that
the shape and the size of terminal connections do not only enable the basic function but also fastening of the module (B) to or at the protection means (C).
PCT/SI2013/000058 2012-10-04 2013-10-03 Wireless and batteryless module for detecting operating mode of electric devices WO2014055042A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SI201200295A SI24212A (en) 2012-10-04 2012-10-04 Multi-purpose smart module for detecting the operating mode of electrical devices
SIP-201200295 2012-10-04
SI201300303A SI24521A (en) 2013-10-02 2013-10-02 Wireless and bateryless module for detecting operating mode of electric device
SIP-201300303 2013-10-02

Publications (1)

Publication Number Publication Date
WO2014055042A1 true WO2014055042A1 (en) 2014-04-10

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