Intelligent equipment back clamp circuit based on electric energy meter and intelligent equipment back clamp

Abstract

The utility model relates to an intelligent equipment back clip circuit based on an electric energy meter and an intelligent equipment back clip, and the circuit comprises a control module which is used for carrying out the overall control of the circuit; the charging module is used for charging or discharging the back splint circuit; the man-machine interaction module is used for outputting or inputting signals; the communication module is used for communication transmission; the data transmission module is used for uploading data to the control module or transmitting the data to the control module; the power management module is used for power management of the back splint circuit; and the function module is used for executing actions to carry out moving operation. An intelligent equipment and back splint application mode is provided, the intelligent equipment is used for uplink communication and background interaction, the back splint is used for a field operation and maintenance meter reading service function, the intelligent equipment communicates with the back splint in a Bluetooth mode, the stability and efficiency are higher, and the operation efficiency is improved. The back splint is light and small in size, convenient, easy to carry, capable of being integrated and separated from the intelligent equipment according to needs, suitable for more business scenes, low in power consumption and long in working time.

Description

Technical Field

[0001] The utility model relates to the field of a smart device back clip circuit and a smart device back clip, in particular to a smart device back clip circuit and a smart device back clip based on an electric energy meter. Background Art

[0002] At present, the meter reading and maintenance in the power operation and maintenance work uses a dedicated terminal solution (metering handheld). In terms of hardware: after several years of development, the dedicated terminal has undergone several major version iterations, and the optimization effect is mainly reflected in five aspects: First, the memory has increased from the original 512KB to 3GB, and the performance has been greatly improved; second, the appearance has changed from the original various styles to a unified mold, which is beautiful in style and also reduces the learning cost of operation and maintenance personnel; third, the operating system has been changed from the original Linux system and WindowsCE system to the unified Android 5.0 and above system, which improves the system fluency and stability; fourth, the upgrade of security unit 1.0 to 2.0 has been completed, the encryption algorithm has been optimized, the business coverage has been expanded, and the security of data has been further improved; fifth, the Bluetooth / camera function has been created from scratch to meet a wider range of application scenarios for on-site operations, such as photo information collection, etc. In terms of software: in order to support the rapid and efficient development of the business, a variety of APPs have been organized and developed in combination with actual needs, and good application effects have been achieved. The line loss management APP and GIS intelligent operation and maintenance APP built by State Grid Beijing Company are used for line loss management and indicator control, and the GIS application is combined to improve the work efficiency of operation and maintenance personnel; the customer service APP and electricity fee management APP built by State Grid Zhejiang Company are used to query and collect customer information, manage the progress of electricity fee recovery and other scenarios to improve customer satisfaction; the power grid mobile application built by State Grid Shanxi Company is used for the substation manager to conveniently handle the operation and maintenance work in the substation under his jurisdiction; the one-click installation and disassembly APP and arbitrary meter calibration APP built by State Grid Henan Company are used for the installation and replacement of metering equipment on site, the clock calibration of any electric energy meter on site, and other services to ensure that the on-site operation and maintenance work can be carried out efficiently. However, some problems have also been exposed in use. The mobile operation terminals used by various network provinces have problems such as short battery life, battery swelling, slow GPS positioning, automatic shutdown of the camera due to overheating, short infrared meter reading distance, and low infrared meter reading success rate. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the mobile operation terminals used by various network provinces have problems such as short battery life, battery swelling, slow GPS positioning, automatic shutdown of camera overheating, short infrared meter reading distance, and low infrared meter reading success rate. In view of the above defects of the prior art, a smart device back clip circuit and a smart device back clip based on an electric energy meter are provided.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] Constructing a smart device back clip circuit for an electric energy meter, including a control module, a charging module, a human-computer interaction module, a communication module, a data transmission module and a power management module, and the circuit also includes a functional module;

[0006] A control module, used for overall control of the circuit;

[0007] A charging module, electrically connected to the control module, and used to charge or discharge the back clip circuit;

[0008] A human-computer interaction module is electrically connected to the control module and is used for signal output or input;

[0009] A communication module is electrically connected to the control module and performs communication transmission;

[0010] A data transmission module, electrically connected to the control module and used to upload data to the control module or transmit data to the control module;

[0011] A power management module, electrically connected to the control module and used for power management of the back clip circuit;

[0012] The functional module is electrically connected to the control module and is used to execute actions to perform mobile meter reading operations.

[0013] Preferably, the functional module includes a data interaction circuit, an infrared circuit, a security unit circuit, a two-dimensional scanning circuit and an RFID circuit.

[0014] Preferably, the infrared circuit includes a common infrared circuit and a laser infrared circuit, and both the common infrared circuit and the laser infrared circuit include a controlled power supply, and the controlled power supply is composed of two groups of transistors and resistors.

[0015] Preferably, the security unit circuit includes an encryption module, a power control and a reset circuit, the encryption module performs data interaction for data communication of the security unit circuit, the power control is composed of a twentieth MOS tube, a twenty-first MOS tube, a fifty-second resistor and a thirty-third resistor, and the reset circuit is composed of an eleventh chip, a fifty-third resistor and a thirty-second resistor.

[0016] Preferably, the two-dimensional scanning circuit includes a two-dimensional scanning module, a connector interface and a power control, the two-dimensional scanning module performs data interaction of data communication of the two-dimensional scanning circuit, and the power control is composed of a third chip, an eighth capacitor, a ninth capacitor, a twelfth capacitor and a fifty-fifth resistor.

[0017] Preferably, the data interaction circuit is composed of a 485 chip, a fourth transistor, six resistors, a capacitor and two groups of ESD tubes.

[0018] Preferably, the charging module includes a fast charging circuit and a power bank circuit, the fast charging circuit includes a fifth chip, and a plurality of resistors, capacitors, inductors, TVS tubes and MOS tubes arranged on the periphery of the fifth chip, and the fast charging circuit can discharge.

[0019] Preferably, the power management module is composed of a third power chip, a power button, a diode, a resistor and a capacitor;

[0020] The data transmission module consists of a USB interface and a TVS protection device.

[0021] Preferably, the human-computer interaction module includes a power button, an oscillator circuit, an LED indicator light and a buzzer, and the communication module includes a Bluetooth communication circuit and an NFC card.

[0022] A smart device back clip for an electric energy meter is constructed, wherein the smart device back clip contains the smart device back clip circuit for an electric energy meter as described above, and the smart device is a mobile phone or a smart tablet.

[0023] The beneficial effects of the utility model are: by including Bluetooth communication, RS485 communication, infrared communication, security unit, barcode scanning, high-frequency RFID function and soft encryption communication and other functions. In the field operation and maintenance of electric power, the electric energy meter can be operated with on-site operation functions such as on-site supplementary reading, on-site power outage and restoration, parameter setting, on-site time calibration, key downloading, electricity price adjustment and on-site recharge, and parameter configuration can also be performed with infrared communication of terminal equipment. It solves the problems of short battery life, slow GPS positioning, automatic shutdown of camera overheating, short infrared meter reading distance, low infrared meter reading success rate, and poor interactive experience of operation terminal in the process of meter reading using mobile operation terminal. It has the advantages of better user experience, convenient operation, stable data communication, etc., and is used to transmit data after meter reading and maintenance to the background, and communicate with the background system in real time; at the same time, it is small in size, easy to carry, and has long battery life. The business function interacts with the meter to improve the management efficiency of power operation and maintenance.

[0024] A mobile phone smart device + back clip application mode is proposed. The smart device is used for uplink communication and background interaction, while the back clip is specifically used for on-site operation and maintenance meter reading business functions, and the smart device and the back clip communicate via Bluetooth. In this way, the respective advantages of smart devices and operation terminals are concentrated. The operation and use experience of smart devices are relatively better than those of operation terminals, and the meter reading function specially designed for the independent module of the back clip is also better than that of the integrated operation terminal, with higher stability and efficiency. For on-site operation and maintenance personnel, the operation efficiency can be greatly improved. Compared with dedicated terminals, the advantages of smart device back clips are mainly reflected in three aspects: first, the size is small, convenient, and easy to carry. At the same time, it can be integrated and separated from smart devices as needed to adapt to more business scenarios; second, the back clip has low power consumption and can work for a long time. Third, the effective infrared communication distance is increased, which reduces the complexity of on-site operations of operation and maintenance personnel to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0026] Figure 1 This is a schematic block diagram of the principle of the back clip circuit of a preferred embodiment of the utility model;

[0027] Figure 2 A specific circuit diagram of a common infrared circuit of a back clip circuit of a preferred embodiment of the utility model;

[0028] Figure 3 A specific circuit diagram of the laser infrared circuit of the back clip circuit of the preferred embodiment of the utility model;

[0029] Figure 4 A specific circuit diagram of a safety unit circuit of a back clip circuit of a preferred embodiment of the utility model;

[0030] Figure 5 A specific circuit diagram of a two-dimensional scanning circuit of a back clip circuit of a preferred embodiment of the utility model;

[0031] Figure 6 A specific circuit diagram of a data interaction circuit of a back clip circuit of a preferred embodiment of the utility model;

[0032] Figure 7 This is a specific circuit diagram of the fast charging circuit of the back clip circuit of the preferred embodiment of the utility model;

[0033] Figure 8This is a specific circuit diagram of the power management module of the back clip circuit of a preferred embodiment of the utility model;

[0034] Fig. 9 A specific circuit diagram of a buzzer in a back clip circuit of a preferred embodiment of the utility model;

[0035] Fig.10 This is a specific circuit diagram of the LED indicator light of the back clip circuit of the preferred embodiment of the utility model;

[0036] Fig.11 A specific circuit diagram of the Bluetooth communication circuit of the back clip circuit of a preferred embodiment of the utility model;

[0037] Fig.12 This is a specific circuit diagram of the data transmission module of the back clip circuit in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0039] The preferred embodiment of the utility model is based on the smart device back clip circuit for the electric energy meter; Figure 1 As shown, it includes a charging module 1, a control module 2, a human-computer interaction module 3, a power management module 4, a functional module 5, a communication module 6 and a data transmission module 7. The power management module 4 is connected to a power source to power the back clip circuit.

[0040] Specifically, Figure 1 As shown, the control module 2 is electrically connected and transmits signals with the charging module 1, the human-computer interaction module 3, the power management module 4, the functional module 5, the communication module 6 and the data transmission module 7. The charging module 1 includes a fast charging module 11 and a charging plate module 10. The back clip circuit is charged through the fast charging module and can also be discharged through the fast charging module. At this time, the back clip circuit is equivalent to the function of a power bank. The human-computer interaction module 3 includes a power button 30, an oscillator circuit 31, an LED indicator light 32 and a buzzer 33. The power button 30 controls the power on and off of the back clip, the LED display circuit displays the working status of the back clip, and the buzzer 33 issues a sound alarm when necessary. The functional module 5 includes a data interaction circuit 50, an ordinary infrared circuit 51, a laser infrared circuit 52, a security unit circuit 53, a two-dimensional scanning circuit 54 and an RFID circuit 55. The communication module 6 includes a Bluetooth communication circuit 60 and an NFC card 61.

[0041] Furthermore, if Figure 2 As shown, the common infrared circuit 51 includes a tenth infrared receiving tube U10, a forty-third resistor R43 is connected between the 1st pin and the 3rd pin of the tenth infrared receiving tube U10, a twenty-sixth capacitor C26 is connected between the 2nd pin and the 3rd pin, the 2nd pin is grounded, and the 3rd pin is connected to the I R33V power supply. The common infrared circuit 51 also includes an eighth chip U8, the 5th pin of the eighth chip U8 is connected to the I R33V power supply, the 3rd pin is grounded, the 2nd pin is connected to the forty-ninth resistor R49 and the third transistor Y3 arranged in parallel, the other end of the forty-ninth resistor R49 and the third transistor Y3 is connected to the 4th pin through the forty-fourth resistor R44, and is grounded through the 30th capacitor C30, and the 2nd pin is grounded through the 31st capacitor C31. The 4th pin is connected to the c-pole of the 19th transistor Q39 and the b-pole of the 18th transistor Q18 through the 42nd resistor R42, the e-pole of the 19th transistor Q39 is grounded, the 45th resistor R45 is connected between the c-pole and the e-pole, and the b-pole of the 19th transistor Q39 is connected to the I R33V power supply through the 48th resistor R48 and the 56th resistor R56 arranged in series. The e-pole of the 18th transistor Q18 is grounded, and the 45th resistor R45 is connected between the b-pole and the e-pole, and the c-pole is connected to the 12th infrared emitting tube D12 and the 41st resistor R41 arranged in series to connect to the I R33V power supply. The ordinary infrared circuit 51 also includes the D-pole of the 16th MOS tube Q16 connected to the I R33V power supply, and grounded through the 25th capacitor C25, the S-pole is connected to VDD33, and grounded through the 24th capacitor C24, the 39th resistor R39 is connected between the G-pole and the S-pole, and the G-pole is connected to the 17th transistor Q17 and then connected to the control module.

[0042] Furthermore, if Figure 2As shown, the ordinary infrared circuit 51 realizes the control of the power supply by the control module. The controlled power supply is composed of the seventeenth transistor Q17, the thirty-ninth resistor R39 and the sixteenth MOS tube. When the ordinary infrared module needs to perform a task, the controlled power supply is turned on, and when the ordinary infrared module is not working, the controlled power supply is turned off. The ordinary infrared circuit 51 communicates with a center frequency carrier of 38KHz. The eighth chip U8, the third transistor Y3, the forty-ninth resistor R49, the thirty-first capacitor C31, the thirtieth capacitor C30 and the forty-fourth resistor R44 are used to generate a square with a frequency of 38KHz and a capacity ratio of 50%, which is transmitted to the transistor after passing through the forty-second resistor R42. After the power supply is started, the frequency of 38KHz has been generated. When there is no data communication, TX2 / IR is the default pull-up high level of the serial port. After the nineteenth transistor Q19 is turned on, 38KHz is equivalent to the reference ground when there is no communication. At this time, the eighteenth transistor Q18 is not turned on, the twelfth infrared emitting tube D12 is not working, and the infrared signal is not emitted. When TX2 / IR has communication data (serial port falling edge triggers communication) and is at a low level, the nineteenth transistor Q19 is not turned on, and the 38KHz carrier turns on the eighteenth transistor Q18, thereby triggering the twelfth infrared emitting tube D12 to transmit with a 38KHz carrier. Thus, the infrared transmitting function is achieved. The tenth infrared receiving tube U10 integrates an infrared decoding device, which outputs information through pin 1 after decoding and is connected to the RX2 pin of the control module, thereby realizing the infrared transmitting and receiving functions.

[0043] Furthermore, if Figure 3 As shown, the laser infrared circuit 52 has the same communication principle as the common infrared circuit, and will not be described again here. The reason why it is not powered on is that the angle range of the laser infrared emission is only an effective aperture of a few cm in diameter, which will increase with the distance (after testing, the diameter of the laser effective spot is no more than 12 cm at 1m, no more than 14 cm at 3m, and no more than 18 cm at 5m), while the common infrared is effective within the aperture range. Basically, it is effective on the plane of 180 degrees in front of the transmitting tube.

[0044] Furthermore, if Figure 4As shown, the security unit circuit 53 is composed of the ninth chip U9 (SMOD24) of the State Grid encryption module, the power control and reset circuit. The power control is composed of the twenty-first transistor Q21, the twenty-third transistor Q20, the fifty-second resistor R52 and the thirty-third capacitor C33. The control module controls the power supply of the module unit. When the output is high, the power supply is normal. When the output is low, the power supply is disconnected. The reset circuit is composed of the eleventh chip U11, the fifty-third resistor R53 and the thirty-second capacitor C32. When powered on, it is ensured that the ninth chip U9 encryption module can be reset normally. Ensure its stability. After the power is successfully powered on, the data communication is carried out by the RX2 / SAFE and TX2 / SAFE interfaces of the encryption module and the serial port of the processor for data exchange.

[0045] Furthermore, if Figure 5 As shown, the two-dimensional scanning circuit 54 includes a two-dimensional scanning module, a connector interface J2, and a power control. The power control is composed of a third chip U3, a ninth capacitor C9, an eighth capacitor C8, a twelfth capacitor C12, and a fifty-fifth resistor R55. The control module controls the power supply of the module unit. When the output is high, the power supply is normal, and when the output is low, the power supply is disconnected. After the power is successfully powered on, the data communication is performed by the RX2 / SCAN and TX2 / SCAN interfaces of the scanning module and the serial port of the processor for data exchange. The two-dimensional code circuit is used to identify the two-dimensional code to ensure that the meter barcode information is consistent with the work order information before the on-site meter reading business, and the accuracy of the information is guaranteed. It can also realize on-site supplementary copying, on-site power outage and restoration, parameter setting and verification, meter key downloading, electricity price adjustment, clock setting and other function settings.

[0046] Furthermore, if Figure 6 As shown, the data interaction circuit 50 is composed of an RS485 chip, a fourth transistor Q4, a thirty-second resistor R32, a thirty-third resistor R33, a twenty-third resistor R23, a thirty-first resistor R31, a forty-third resistor R43, a forty-fourth resistor R44, a twenty-third capacitor C23 and an ESD tube TVS6 / TVS7. The chip is powered by VDD33, which is consistent with the main power supply of the processor. Data communication is carried out by the first pin R0 and the fourth pin DI of the RS485 chip and the serial ports UART4_RX and UART4_TX of the processor for data interaction.

[0047] Furthermore, if Figure 7As shown, the fast charging circuit 11 selects 18W fast charging, which includes the fifth chip U5, peripheral resistors, capacitors, TVS, MOS tubes, inductors, etc. The fifth chip U5 adopts the IC IP5332 model. IP5332 is an Inchip fast charging chip that supports 18W QC2.0 and QC3.0 protocols. When the USB is connected, the VBUS power supply network is input to the chip, and the CC pin determines whether it is a charging function or an OTG discharge function. If the CC pin does not touch the OTG function, it is a charging mode. The current passes from VBUS through the MOS tube to the internal processing of the chip, and is connected to the battery end from the VBAT network, thereby realizing the charging function. If the CC pin triggers the OTG function, the current flows from the VBAT network at the battery end to VBUS, and the discharge function is performed from the outside (equivalent to the power bank function). The back clip circuit enables the back clip to have a power bank function, avoiding the situation where the operation and maintenance personnel must return due to the lack of power in mobile phones and other equipment. The back clip supports the power bank function, which increases the working time of the equipment / mobile phone to a certain extent and improves the on-site work efficiency.

[0048] Furthermore, if Figure 8 As shown, the power management module 4 is composed of a power button S1, a diode, a resistor, a capacitor, a power chip U3, etc. The battery voltage VBAT is divided by a resistor after passing through the button S1, and then passes through a diode to obtain the network OPEN. Connect to the enable pin 3 of the power chip. When S1 is pressed, OPEN gets a high level, thereby triggering the power supply IC to supply power to obtain the main power supply VDD33, and the entire system starts working, so that the processor outputs PB0 / VDD_PWR to output a high level, so that the enable pin of the power IC is maintained at a high level. At this time, releasing the button also outputs VDD33 normally. In the power-on state, when S1 is pressed and held, the PB1 / ON_OFF network changes from a low level to a high level, and then cooperates with the processor's time judgment and processing to obtain the long press time. After reaching the specified 3 seconds, the shutdown action is executed, so that PB0 / VDD_PWR outputs a low level, and the button is released. The enable pin of the power IC becomes a low level, the main power supply VDD33 becomes 0V, and the system shuts down. Thus, the power management function is realized.

[0049] Furthermore, if Fig. 9 As shown, the buzzer consists of a passive buzzer B2, a diode D1, a transistor Q16, and resistors R41 / R42. When sound needs to be made, the processor PA1 / PWM generates a 3KHz square wave with a duty cycle of 50% by the CPU to drive the buzzer. When no sound is needed, PA1 / PWM outputs a low level, Q16 is not turned on, B2 does not work, and no current is consumed.

[0050] Furthermore, if Fig.10As shown, LED indicator light 32 is directly driven by the IO port of the CPU processor. When PC0 outputs a low level of 0V, indicator light D2 is on, and when PC0 outputs a high level of 3.3V, indicator light D2 is off. The other indicator lights use the same principle. In addition to designing a current limiting resistor in the indicator light, an antistatic TVS tube is also connected to the interface between each indicator light and the CPU to effectively prevent static electricity from being introduced into the CPU and prevent the CPU from being disturbed by static electricity and restarting. The indicator light circuit can include a power indicator, with different color indications when the power is insufficient and sufficient; a Bluetooth connection indicator, which distinguishes between unconnected and connected indications; a function indicator light, and a corresponding indicator light indication during the communication process of the module, etc., so that the working status of the device can be judged by the LED indicator light.

[0051] Furthermore, if Fig.11 As shown, the Bluetooth communication circuit 60 is composed of a Bluetooth module U2, peripheral resistors, capacitors, electrostatic TVS tubes, etc. The power supply uses the same power supply VDD33 as the CPU. In addition, there are Bluetooth connection status indication pin 15 (PA11 / BLT_CONCENT), communication flow control pin 22 (PC5 / BT_RTS), reset pin 28 (PC12 / BT_RST), and communication interfaces TX3 and RX3 connected to the CPU. The ESD devices TVS11\TVS7\TVS8 in the circuit design of this module can effectively prevent static electricity from being introduced into the CPU and prevent the CPU from being restarted due to static electricity interference. The NFC card function can also be used, which is convenient for the mobile phone to be close to the back clip antenna area after the NFC is started. After identification, it automatically connects to Bluetooth, eliminating the process of manually connecting Bluetooth, improving user experience, and enhancing product competitiveness.

[0052] Furthermore, if Fig.12 As shown, the data transmission module 7 is composed of a standard Type-C USB interface and a protection device TVS. Since the USB is an interface for charging and discharging, adding a TVS tube to the design can better protect the internal circuit.

[0053] A smart device back clip for an electric energy meter is constructed, and the back clip contains the smart device back clip circuit for an electric energy meter as described above. The smart device can be a mobile phone, a tablet or other smart devices, and the specific back clip circuit is as described above, which will not be repeated here.

[0054] It should be understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A smart device back clip circuit for an electric energy meter includes a control module, a charging module, a human-computer interaction module, a communication module, a data transmission module and a power management module, characterized in that: The circuit also includes a functional module; A control module, used for overall control of the circuit; A charging module, electrically connected to the control module, and used to charge or discharge the back clip circuit; A human-computer interaction module is electrically connected to the control module and is used for signal output or input; A communication module is electrically connected to the control module and performs communication transmission; A data transmission module, electrically connected to the control module and used to upload data to the control module or transmit data to the control module; A power management module, electrically connected to the control module and used for power management of the back clip circuit; The functional module is electrically connected to the control module and is used to execute actions to perform mobile meter reading operations.

2. The back clip circuit according to claim 1, characterized in that: The functional module includes a data interaction circuit, an infrared circuit, a safety unit circuit, a two-dimensional scanning circuit and an RFID circuit.

3. The back clip circuit according to claim 2, characterized in that: The infrared circuit includes a common infrared circuit and a laser infrared circuit. Both the common infrared circuit and the laser infrared circuit include a controlled power supply. The controlled power supply is composed of two groups of triodes and resistors.

4. The back clip circuit according to claim 2, characterized in that: The security unit circuit includes an encryption module, a power control and a reset circuit. The encryption module performs data interaction for data communication of the security unit circuit. The power control is composed of a 20th MOS tube, a 21st MOS tube, a 52nd resistor and a 33rd resistor. The reset circuit is composed of an 11th chip, a 53rd resistor and a 32nd resistor.

5. The back clip circuit according to claim 2, characterized in that: The two-dimensional scanning circuit includes a two-dimensional scanning module, a connector interface and a power control. The two-dimensional scanning module performs data interaction for data communication of the two-dimensional scanning circuit. The power control is composed of a third chip, an eighth capacitor, a ninth capacitor, a twelfth capacitor and a fifty-fifth resistor.

6. The back clip circuit according to claim 2, characterized in that: The data interaction circuit is composed of a 485 chip, a fourth transistor, six resistors, a capacitor and two groups of ESD tubes.

7. The back clip circuit according to any one of claims 1 to 6, characterized in that: The charging module includes a fast charging circuit and a power bank circuit. The fast charging circuit includes a fifth chip, and a number of resistors, capacitors, inductors, TVS tubes and MOS tubes arranged on the periphery of the fifth chip. The fast charging circuit can discharge.

8. The back clip circuit according to claim 7, characterized in that: The power management module is composed of a third power chip, a power button, a diode, a resistor and a capacitor; The data transmission module consists of a USB interface and a TVS protection device.

9. The back clip circuit according to claim 1, characterized in that: The human-computer interaction module includes a power button, a vibrator circuit, an LED indicator light and a buzzer, and the communication module includes a Bluetooth communication circuit and an NFC card.

10. The smart device back clip for electric energy meter is characterized by: The smart device back clip includes a smart device back clip circuit for an electric energy meter as described in any one of claims 1 to 9, and the smart device is a mobile phone or a smart tablet.

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