CN207923985U - A kind of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers - Google Patents

Abstract

A kind of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers of the utility model, its main feature is that：Including：Single chip circuit is electrically connected with MEMS acceleration sensor circuits, memory module circuit, temperature measuring circuit respectively.Whether can realize that intelligent electric energy meter power supply can accomplish the monitoring of suspicious actions or not, it is anti-electricity-theft to be active anti-electricity-theft to become passive type.Have many advantages, such as small, light weight and cost is low, low in energy consumption, reliability is high, suitable for mass production, be easily integrated and realize intelligence.

Description

A kind of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers

Technical field

The utility model belongs to intelligent grid field, is that a kind of intelligent electric energy meter based on MEMS acceleration transducers is thief-proof Circuit.

Background technology

With the fast development of Chinese economy, the electricity consumption of enterprise and resident rise year by year, intelligent electricity has been greatly facilitated The all-round construction of net so that intelligent electric energy meter market development is swift and violent, and since 2009, national grid and south electric network were with unified The mode of bid promotes intelligent electric energy meter, realizes all standing of intelligent electric energy meter substantially now.Current domestic intelligence electricity The total quantity of energy table is more than 500,000,000.Intelligent electric energy meter is powerful, and accuracy class is high, has the function of bidirectional measuring, supports green The color energy is grid-connected, has local infrared communication interface, it may be convenient to be communicated with infrared palm machine, have electric line carrier communication mould Block or GPRS wireless communication modules can complete the networking communication of automatic meter reading system, have both-way communication ability, and collection now Middle kilowatt meter reading-out system has been realized in full acquisition, all standing, and all networkings of all intelligent electric energy meters communicate, in intelligent electric energy meter Portion has the Security Encryption module ESAM of the close SM1 algorithms of state, it is ensured that communication data is carefree, and the high property that intelligent electric energy meter uses The computation chip of energy has the function of neutral line current measurement, can detect tens kinds of stealing modes so that conventional electricity filching means base This is all contained that the stealing problem of puzzlement power supply enterprise for a long time is greatly alleviated.But for the stealing of intelligent electric energy meter Means are also corresponding more advanced, more hidden：Have after destroying seal, intelligent electric energy meter cover is opened, directly in the meter of electric energy meter It measures and replaces sample circuit component in sample circuit, so that electric energy meter is walked slow, then use the personation seal lead sealing again of Gao Fang Electric energy meter, inspector are difficult identification；What is more, after intelligent electric energy meter is illegally moved, by the back side, that is, bottom case of electric energy meter Destroy, then change circuit connection and related component parameter, after intelligent electric energy meter original position extension is gone back, front checks basic It can not note abnormalities；Or by intelligent electric energy meter illegally move after, its installation wall in dig a hole after be implanted into strong magnet, after will Intelligent electric energy meter, which sets back, to be set, and in this way can not act the on-load switch for leading to intelligent electric energy meter.These are novel, violence Electricity filching means have seriously damaged the interests of electric power enterprise, have upset normally for electricity consumption order, and becoming influences electric utility hair The big constraint of the one of exhibition, and seriously threaten Electrical Safety.Therefore, power supply enterprise must targetedly enrich hand of opposing electricity-stealing Section, increases the cruising frequency of inspection troop, while increasing the number of inspection troop, thus considerably increases the pipe of power supply department Cost is managed, and cannot find stealing accident in first time, it can only be monthly according to line loss exception information, by-line road, by user Investigation, it is extremely inefficient, be that a kind of passive type is anti-electricity-theft.

Invention content

Technical problem to be solved by the utility model is to provide it is a kind of it is small, light weight and cost is low, it is low in energy consumption, can It is high by property, suitable for mass production, be easily integrated and realize the intelligentized intelligent electric energy meter based on MEMS acceleration transducers Burglar-proof electric circuit.Intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers, MEMS acceleration transducers are created Property be applied on intelligent electric energy meter, become passive type it is anti-electricity-theft to be active anti-electricity-theft, formally installed in intelligent electric energy meter in this way After coming into operation to user scene, by installing infrared palm machine of the electrician by power supply management department, opened using cipher mode transmission It is instructed with MEMS acceleration transducers, after intelligent electric energy meter receives instruction, the measurement function of unlatching MEMS acceleration transducers, one Game clock lid, inclination, vibrations occur for denier intelligent electric energy meter；Or when being attacked by electric drill impact external force, in intelligent electric energy meter The MEMS numbers 3-axis acceleration sensor for the intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers set can incite somebody to action The impact that measures, vibration signal pass to the MCU of intelligent electric energy meter, and the MCU of intelligent electric energy meter at once believes 3-axis acceleration Number digital processing is carried out, it, will be by after calculating angle of inclination suffered by current intelligent electric energy meter, rate, displacement, impact condition EEPROM is written to the time of attack, current power information and carries out suspicious event record, if it is normal to power, passes through intelligence PLC communication module or GPRS wireless communication modules built in electric energy meter copy suspicious event information reporting to concentration The management main website of table system；If the intelligent electric energy meter power-off attacked, can re-power the first time put into operation, Suspicious event is reported to the main website of automatic meter reading system at once, prompts inspector to on-site verification, it would be possible to stealing damage occur It loses and is reduced to minimum degree.Can be when similar violence electricity stealing just take place, energy active reporting is copied to concentration Table system after notifying inspector to reach scene, can directly read the suspicious actions note of intelligent electric energy meter by infrared palm machine The time attacked, number are grasped in record, convenient for analysis field condition.Power department loss will be greatly reduced in this way, can effectively be beaten Hit electricity stealing.Become active anti-electricity-theft by passive type is anti-electricity-theft：It was that stealing first occurs in the past, then coming few months discovery Line loss is abnormal, starts artificial by-line road afterwards, by user's investigation, the anti-electricity-theft flow of passive type of key monitoring.It is stealing row now When just to occur or carrying out, the suspicious actions of user can be found at once in the main website of automatic meter reading system, for fulgurite Reason inspector can rush for scene at once, can greatly promote the efficiency and effect of work, become active anti-electricity-theft.And And in the intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers, the power consumption of MEMS acceleration transducers is extremely low, When 3.3V voltages, for power consumption less than 25 μ A, power consumption is 0.1 μ A under standby mode, can perfectly be applied to intelligence under measurement pattern It inside electric energy meter, is worked using the power cut-off recording battery inside intelligent electric energy meter when power failure, when power supply is worked using system power supply. Whether intelligent electric energy meter power supply can accomplish the monitoring of suspicious actions in this way or not, it is anti-electricity-theft to be active thief-proof to become passive type Electricity.

Solve its technical problem the technical solution adopted is that, a kind of intelligent electric energy meter based on MEMS acceleration transducers is anti- Stealing circuit, it is characterized in that：It include single chip circuit respectively with MEMS acceleration sensor circuits, memory module circuit, temperature Spend measuring circuit electrical connection.

The single chip circuit includes：Microcontroller U1 and resistance R124, capacitance C45-C49, crystal oscillator F1, F2 are connected.

The microcontroller U1 uses model 78F1166 microcontrollers.

The MEMS acceleration sensor circuits are MEMS acceleration transducers U2, MEMS acceleration transducer U2's The ports PULSE are connect with the ports PULSE of microcontroller U1；The ports CS of MEMS acceleration transducers U2 and the ends CS of microcontroller U1 Mouth connection；The ports SDO of MEMS acceleration transducers U2 are connect with the ports SDO of microcontroller U1；MEMS acceleration transducers U2 The ports SDI connect with the ports SDI of microcontroller U1；The SCLK of the ports SCLK and microcontroller U1 of MEMS acceleration transducers U2 Port connects.

The MEMS acceleration transducers U2 uses model ADXL345 number 3-axis acceleration sensors.

The memory module circuit includes that memory U3 is electrically connected with resistance R93, the ports SCL1 of memory U3 and list The ports SCL1 of piece machine U1 connect, and the ports SDA1 of memory U3 are connect with the ports SDA1 of microcontroller U1.

The temperature measuring circuit includes that temperature sensor U4 is electrically connected with resistance R130, the DATA of temperature sensor U4 Port is connect with the ports DATA of microcontroller U1.

A kind of the advantages of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers of the utility model, embodies ：

The real time temperature of temperature sensor U4 is read by microcontroller U1, and then MEMS is accelerated according to current real time temperature Degree sensor U2 does temperature-compensating, and the range of temperature-compensating is -40 DEG C to+80 DEG C, and every 10 DEG C are done a temperature-compensating, compensation point Have -40 DEG C, -30 DEG C ..., 0 DEG C, 10 DEG C ..., 80 DEG C of totally 13 compensation points, it is ensured that MEMS acceleration transducers U2 is operated in height Precision state.Interrupt output can be generated at once if MEMS acceleration transducers U2 detects impact signal to the ports PULSE, Interrupting input the mouth PULSE, microcontroller U1 that the interrupt output is connected to microcontroller U1 respond interruption at once, do suspicious event detection and Record, and active reporting is started by the power line carrier module or GPRS module of intelligent electric energy meter itself immediately.Microcontroller U1 At every 0.5 second, the 3-axis acceleration value of MEMS acceleration transducers U2 is read, angle of inclination, rate, the position of electric energy meter are calculated The mobile status such as shifting, once run-off the straight, illegal movement, then do suspicious event detection and record, and pass through intelligence immediately at once The power line carrier module or GPRS module of electric energy meter itself start active reporting.

By being applied on intelligent electric energy meter for MEMS acceleration transducer creativeness, it is anti-electricity-theft to be active anti-to become passive type Stealing.It is formally installed to after user scene comes into operation in intelligent electric energy meter in this way, passes through power supply management department by installing electrician Infrared palm machine, use cipher mode send enable MEMS acceleration transducers instruction, after intelligent electric energy meter receives instruction, open The measurement function of MEMS acceleration transducers, once game clock lid, inclination, vibrations occur for intelligent electric energy meter；Or by electric drill When impact external force is attacked, the intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers built in intelligent electric energy meter The impact measured, vibration signal can be passed to the MCU of intelligent electric energy meter by MEMS acceleration transducers U2, intelligent electric energy meter 3-axis acceleration signal is done digital processing by MCU at once, calculate angle of inclination suffered by current intelligent electric energy meter, rate, Displacement, impact condition, after by the time under attack, current power information write-in EEPROM carry out suspicious event record, such as Fruit power supply is normal, then will be suspicious by PLC communication module built in intelligent electric energy meter or GPRS wireless communication modules Event information is reported to the management main website of automatic meter reading system；If the intelligent electric energy meter power-off attacked, can be on again The first time that electricity puts into operation, at once suspicious event be reported to the main website of automatic meter reading system, prompt inspector to live It verifies, it would be possible to stealing loss occur and be reduced to minimum degree.Can when similar violence electricity stealing just takes place, Energy active reporting can directly read intelligence after notifying inspector to reach scene to automatic meter reading system by infrared palm machine The suspicious actions record of energy electric energy meter, grasps the time attacked, number, convenient for analysis field condition.It will greatly reduce in this way Power department loses, and can effectively hit electricity stealing.Become active anti-electricity-theft by passive type is anti-electricity-theft：It was first to steal in the past Electricity, then coming few months discovery line loss is abnormal, starts artificial by-line road afterwards, is investigated by user, the passive type of key monitoring is prevented Stealing flow.When being that electricity stealing has just occurred or carried out now, can at once it be found in the main website of automatic meter reading system The suspicious actions of user, power supply management inspector can rush for scene at once, can greatly promote the efficiency and effect of work, Become active anti-electricity-theft.Also, in the intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers, MEMS acceleration Its power consumption of sensor U2 is extremely low, and when 3.3V voltages, for power consumption less than 25 μ A, power consumption is 0.1 μ A under standby mode, can under measurement pattern The power cut-off recording battery work inside intelligent electric energy meter, power supply are used to be perfectly applied to inside intelligent electric energy meter, when power failure When worked using system power supply.Whether intelligent electric energy meter power supply can accomplish the monitoring of suspicious actions in this way or not, become passive type Anti-electricity-theft is active anti-electricity-theft.The thief-proof circuit of intelligent electric energy meter based on MEMS acceleration transducers of the utility model can supervise Different forms of violence stealing or high-tech stealing mode are surveyed, position, angle of inclination of intelligent electric energy meter itself etc. can be monitored and changed extremely. And monitoring result is started into active reporting to concentration by the power line carrier module or GPRS module of intelligent electric energy meter itself The existing network facilities is perfectly utilized in the main website of kilowatt meter reading-out system, does not have to live networking, relies solely on the concentration of electric system Meter reading network is achieved that real time monitoring, real time alarm function.MEMS acceleration transducers U2 uses model ADXL345, it Static weight acceleration can be measured in tilt detection application, dynamic acceleration caused by movement or impact can also be measured, Its high-resolution (4mg/LSB), can be not measured 1.0 ° of angle change.The device provides a variety of special detection work( Energy：Whether movable and inactive detection function, the acceleration detected the presence of on movement generation and arbitrary axis are more than user setting Limit value, tap detection function can detect click and double-click action.Existing intelligent electric energy meter is relied on, the utility model will MEMS acceleration transducers are creative to be applied in intelligent electric energy meter, at the software analysis in conjunction with intelligent electric energy meter microcontroller Reason can realize the actively monitoring of violence stealing or high-tech stealing, and it is anti-electricity-theft to be active anti-electricity-theft to become passive type.

Description of the drawings

Fig. 1 is a kind of intelligent electric energy meter burglar-proof electric circuit principle side based on MEMS acceleration transducers of the utility model Block diagram；

Fig. 2 is 1 schematic diagram of single chip circuit in Fig. 1；

Fig. 3 is 2 schematic diagram of MEMS acceleration transducers in Fig. 1；

Fig. 4 is 3 schematic diagram of memory module circuit in Fig. 1；

Fig. 5 is 4 schematic diagram of temperature measuring circuit in Fig. 1；

Fig. 6 is MEMS acceleration transducer temperature-compensating flow charts；

Fig. 7 is the movable inclined process chart of intelligent electric energy meter；

Fig. 8 is impact signal process chart.

Specific implementation mode

A kind of detailed implementation of the intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers of the utility model Mode is as follows：

- Fig. 8 referring to Fig.1, a kind of anti-electricity-theft electricity of intelligent electric energy meter based on MEMS acceleration transducers of the utility model Road, including：Single chip circuit 1 is electric with MEMS acceleration sensor circuits 2, memory module circuit 3, temperature measuring circuit 4 respectively Connection.

With reference to Fig. 2, the single chip circuit 1 includes：Microcontroller U1 and resistance R124, capacitance C45-C49, crystal oscillator F1, F2 is connected.The microcontroller U1 uses model 78F1166 microcontrollers.

With reference to Fig. 3, MEMS acceleration sensor circuits include：MEMS acceleration transducers U2, MEMS acceleration transducer The ports PULSE of U2 are connect with the ports PULSE of microcontroller U1, and the ports CS of MEMS acceleration transducers U2 are with microcontroller U1's The ports CS connect, and the ports SDO of MEMS acceleration transducers U2 are connect with the ports SDO of microcontroller U1, MEMS acceleration sensings The ports SDI of device U2 are connect with the ports SDI of microcontroller U1, and the ports SCLK of MEMS acceleration transducers U2 are with microcontroller U1's The ports SCLK connect.The MEMS acceleration transducers U2 uses model ADXL345 number 3-axis acceleration sensors.

With reference to Fig. 4, memory module circuit 3 includes：Memory U3 is electrically connected with resistance R93, the ports SCL1 of memory U3 It is connect with the ports SCL1 of microcontroller U1, the ports SDA1 of memory U3 are connect with the ports SDA1 of microcontroller U1.

With reference to Fig. 5, temperature measuring circuit 4 includes：Temperature sensor U4 is electrically connected with resistance R130, temperature sensor U4's The ports DATA are connect with the ports DATA of microcontroller U1.

The 78F1166 of auspicious Sha is used with reference to Fig. 2, microcontroller U1, in each whole time, in order to realize that MEMS acceleration passes The high-acruracy survey of sensor U2 needs the temperature-compensating processing for being MEMS acceleration transducer U2 models ADXL345, temperature to mend The range repaid is -40 DEG C to+80 DEG C, it is ensured that in -40 DEG C to+75 DEG C of the operating temperature range of intelligent electric energy meter, MEMS accelerates Spend sensor U2 and keep higher precision, every 10 DEG C are done a temperature-compensating, compensation point have -40 DEG C, -30 DEG C ..., 0 DEG C, 10 DEG C ..., 80 DEG C of totally 13 compensation points.Microcontroller U1 does the software flow pattern of temperature-compensating referring to Fig. 6.The SDI of microcontroller U1, SCLK, CS, SDO form the SPI interface of a simulation, and the MEMS acceleration transducer U2 corresponding ports with Fig. 3 connect, and realize SPI is communicated.It reads three axis with the MEMS acceleration transducers U2 communications of Fig. 3 by SPI interface in whole moment second microcontroller U1 and adds Then velocity amplitude carries out calculation processing, the software flow pattern of microcontroller U1 is referring to Fig. 7.Interrupting input mouth PULSE map interlinkings 3 The correspondence interrupt output port of MEMS acceleration transducers U2, once the interrupt signal of MEMS acceleration transducers U2 is received, then Microcontroller U1 starts interrupt processing flow referring to Fig. 8.

With reference to Fig. 3, MEMS acceleration sensor circuits are MEMS number 3-axis acceleration sensors U2 using ADI's ADXL345, it is a low-power consumption, small-sized, digital 3 axis accelerometer, and for high resolution up to 13, measurement range reaches ± 16g.Number Word output data is 16 complement of two's two's complement formats, can be accessed by SPI interface, tetra- ports SDI, SCLK, CS, SDO are connected to The corresponding ports of Fig. 2 microcontrollers U1, microcontroller U1 timings read 3-axis acceleration value, angle of inclination, rate, displacement are done for software Calculating.The device can provide a variety of special detection functions：Movable and inactive detection function detect the presence of movement occur and Whether the acceleration on arbitrary axis, which be more than the limit value of user setting, taps detection function can detect and click and double-click action.This A little functions may map to interrupt output pin PULSE, the correspondence interrupting input interface of the interrupt output map interlinking 2, for microcontroller U1 softwares do corresponding processing.

With reference to Fig. 4, the memory U3 of memory module circuit uses the FM24C512D of Shanghai Fudan Microelectronics, by SCL1, SDA1 is connected to the corresponding ports of microcontroller U1, realizes I2C communications.There are three purposes for its memory space, are used for preserving 13 first The offset correction values and compensation mark of temperature compensation point；Secondly because calculating angle of inclination has arctan function calculating, in order to subtract Few calculation amount, is reduced the expense of microcontroller, is handled using look-up table, when precision is 0.1 °, needs to preserve 1800 calculating Value；Last remaining space is used as suspicious event record storage area, and moment, duration, punching occurs to record suspicious event Number is hit, electric energy meter is real-time with and without work(energy data block when event occurs.

The DS18B20U of Maxim companies is used with reference to Fig. 5, the temperature sensor U4 of temperature measuring circuit, the sensor Temperature detection range is -55 DEG C to+125 DEG C, fully meets the operating temperature range of intelligent electric energy meter, single bus data port The U1 corresponding ports of DATA map interlinkings 2 are controlled by microcontroller and read real time temperature.

The temperature-compensating processing of MEMS acceleration transducers U2 is done with reference to Fig. 6, microcontroller U1, flow includes following step Suddenly：

1) whole time is noJudge whether to be whole time, only whole time just does temperature-compensating processing, in Fig. 6 Frame 100 shown in.

2) it is no that MEMS acceleration transducers are enabledJudge whether to enable MEMS acceleration transducer U2, in intelligent electric energy meter It installs when coming into operation, by installing special infrared palm machine of the electrician by power supply bureau, uses the intelligent electric energy of cipher mode setting Table opens MEMS acceleration transducers U2 and measures function, so that intelligent electric energy meter is not enabled in transport, calibrating, installation MEMS acceleration transducer U2, only just enable after installation is complete, as shown in the frame 101 in Fig. 6.

3) it reads thermal module and obtains real time temperature.The measuring temperature for reading temperature sensor U4 in Fig. 5, in Fig. 6 Shown in frame 102.

4) current reference temperature does not do temperature-compensatingTemperature-compensating mark of the reading and saving in Fig. 4 memory modules U3, sentences Whether disconnected Current Temperatures did temperature operation, as shown in the frame 103 in Fig. 6.

5) according to Current Temperatures, the offset data of corresponding temperature range when reading manufacture.It is read out of Fig. 4 memory U3 The offset data of 13 preset temperature spots when factory, have -40 DEG C, -30 DEG C ..., 0 DEG C, 10 DEG C ..., 80 DEG C of totally 13 temperature spots, As shown in the frame 104 in Fig. 6.According to present real-time temperature location, the offset data of corresponding range is obtained.

6) temperature-compensating of MEMS acceleration transducers is done.The offset data that will be obtained in T5, the MEMS for being written to Fig. 3 add In velocity sensor U2, temperature-compensating processing is completed, as shown in the frame 105 in Fig. 6.

7) set current reference temperature has been compensated for indicating, removes other temperature range compensation marks.Current reference temperature It has done excess temperature to compensate for, setting has been compensated for indicating, removes the compensation mark of other temperature ranges, then writes compensation mark Enter into the U3 of Fig. 4 memory modules and preserve, as shown in the frame 106 in Fig. 6.

With reference to Fig. 7, microcontroller U1 after the 3-axis acceleration value that whole moment second reads digital 3-axis acceleration sensor U2, Calculating angle of inclination, rate, the process flow of displacement include the following steps：

(1) whole moment second is noJudge whether to be whole moment second, only whole moment second just does reading and calculation processing, such as Fig. 7 In frame 200 shown in.

(2) it is no that MEMS acceleration transducers are enabledJudge whether to enable MEMS acceleration transducers U2.It is thrown installing Enter in use, by electrician by the special infrared palm machine of power supply bureau, intelligent electric energy meter is set using cipher mode, to enable number 3-axis acceleration sensor U2 measures function.In this way so that intelligent electric energy meter does not enable digital three axis in transport, calibrating, installation Acceleration transducer U2, only just enables after installation is complete, as shown in the frame 201 in Fig. 7.

(3) MEMS acceleration transducer 3-axis acceleration data are read.Read what Fig. 3 MEMS acceleration transducers U2 was measured 3-axis acceleration data, as shown in the frame 202 in Fig. 7.

(4) angle of inclination, rate, displacement are calculated according to 3-axis acceleration.MEMS acceleration transducers U2 is measured according to fig. 3 3-axis acceleration data calculate angle of inclination when static state, rate when calculating illegal mobile and displacement.Wherein inclination angle The test philosophy of degree is, can be by the acceleration of gravity of 1g, under this constraint, angle of inclination when intelligent electric energy meter is static Calculation formula it is as follows：

Wherein：

ɑ is angle of inclination；

Ax, Ay, Ay are the 3-axis acceleration value that MEMS number 3-axis acceleration sensors measure.

Accordingly, the angle of inclination of intelligent electric energy meter can be obtained.Rate, the basic test principle of displacement are, to acceleration Integral can once obtain rate, can once obtain displacement to rate signal integral, microcontroller U1 can obtain current by software calculating Rate, displacement numerical value, provide evidence for illegal movement.As shown in the frame 203 in Fig. 7.

(5) electric energy meter tilts, illegal movement judgesJudge the current angle of inclination of intelligent electric energy meter or rate, displacement Whether illegal movement is triggered, as shown in the frame 204 in Fig. 7.

Overwriting is done in (6) 10 minutesIf constituting illegal mobile, judge the event whether within ten minutes Overwriting is done, as shown in the frame 205 in Fig. 7.

(7) suspicious event record is done, active report of event flow is started.Start to do suspicious event record, will occur the moment, Duration, number of shocks, the real-time of electric energy meter is added with and without information such as work(energy data blocks in record when event occurs, after Record is saved in the U3 of Fig. 4 memories, it is rear to start active report of event flow, suspicious event is passed through into intelligent electric energy meter sheet The power line carrier module or GPRS module of body, the main website of active reporting to automatic meter reading system, such as 206 institute of frame in Fig. 7 Show.

(8) duration is cumulative.If event has recorded, the lasting event of event starts to do accumulation process, It submits necessary information for subsequent analysis event, as shown in the frame 207 in Fig. 7.

With reference to Fig. 8, the interrupt output PULSE signal of MEMS acceleration transducers U2 is directly connected in the correspondence of microcontroller U1 Disconnected input port, the acceleration which is configured on arbitrary axis trigger when being more than the limit value of user setting, and click or double-click It is triggered after tapping detection.Microcontroller U1 uses interrupt mode, does the process flow impacted, shaken, includes the following steps：

1. anti-tampering, Glitch Filter.Digital filtering processing is added, disappear shake, anti-tampering, as shown in the frame 300 in Fig. 8

2. signal is effectiveEffective MEMS acceleration transducers U2 interrupt signals are determined whether, such as the frame 301 in Fig. 8 It is shown.

3. doing overwriting in 10 minutesJudge whether to have done overwriting within ten minutes, such as 302 institute of frame in Fig. 8 Show.

4. doing suspicious event record, start active report of event flow.Start to do suspicious event record, will occur the moment, Duration, number of shocks, the real-time of electric energy meter is added with and without information such as work(energy data blocks in record when impact occurs, after Record is saved in Fig. 4 memories U3, it is rear to start active report of event flow, suspicious event is passed through into intelligent electric energy meter itself Power line carrier module or GPRS module, the main website of active reporting to automatic meter reading system, as shown in the frame 303 in Fig. 8.

5. number of shocks increases.If this event has recorded, the number of shocks of event increases, and is follow-up point Analysis event is submitted necessary information, as shown in the frame 304 in Fig. 7.

A kind of all electronics members of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers of the utility model Device is commercial product.The software program foundation of the utility model automatically controls, computer processing technology is worked out, and is this field Technology known to technical staff.

The embodiment of the utility model is simultaneously not restricted to the described embodiments, other are any without departing from the utility model Changes, modifications, substitutions, combinations, simplifications made by under Spirit Essence and principle, should be equivalent substitute mode, are included in Within the scope of protection of the utility model.

Claims (1)

1. a kind of intelligent electric energy meter burglar-proof electric circuit based on MEMS acceleration transducers, it is characterized in that：It includes：Monolithic is electromechanical Road is electrically connected with MEMS acceleration sensor circuits, memory module circuit, temperature measuring circuit respectively；The single chip circuit Including：Microcontroller U1 and resistance R124, capacitance C45-C49, crystal oscillator F1, F2 are connected；The microcontroller U1 uses model 78F1166 microcontrollers；The MEMS acceleration sensor circuits are MEMS acceleration transducers U2, MEMS acceleration transducer The ports PULSE of U2 are connect with the ports PULSE of microcontroller U1；The ports CS of MEMS acceleration transducers U2 are with microcontroller U1's The ports CS connect；The ports SDO of MEMS acceleration transducers U2 are connect with the ports SDO of microcontroller U1；MEMS acceleration sensings The ports SDI of device U2 are connect with the ports SDI of microcontroller U1；The ports SCLK of MEMS acceleration transducers U2 are with microcontroller U1's The ports SCLK connect；The MEMS acceleration transducers U2 is sensed using model ADXL345 number 3-axis accelerations；It is described Memory module circuit include that memory U3 is electrically connected with resistance R93, the SCL1 of the ports SCL1 and microcontroller U1 of memory U3 Port connects, and the ports SDA1 of memory U3 are connect with the ports SDA1 of microcontroller U1；The temperature measuring circuit includes temperature Degree sensor U4 is electrically connected with resistance R130, and the ports DATA of temperature sensor U4 are connect with the ports DATA of microcontroller U1.