Intelligent electric meter data acquisition terminal equipment based on remote transmission technology

Abstract

The utility model relates to an intelligent electric meter data acquisition terminal device based on remote transmission technology, an infrared probe is attached to an infrared communication interface of an electric meter, a server sends an instruction of a DLT645 standard protocol to a remote transmission module, the remote transmission module processes the instruction into a TTL low-voltage signal and transmits the TTL low-voltage signal to a protocol conversion module, and the protocol conversion module converts the TTL low-voltage signal into a TTL signal. The protocol conversion module converts a signal of the remote transmission module into a TTL high-voltage signal which can be identified by the communication module, the communication module converts the signal into a 485 communication protocol and transmits the 485 communication protocol to the infrared probe, the infrared probe modulates the 485 signal into an infrared signal and transmits the infrared signal to the electricity meter, and the electricity meter returns a parameter corresponding to the command and transmits the parameter to the communication module after receiving the command. The communication module converts a 485 signal into a TTl high-voltage level signal, then the TTl high-voltage level signal is converted into a TTL low-voltage level signal through the protocol conversion module, and after the remote transmission module receives the TTL low-voltage level signal, the TTL low-voltage level signal is uploaded to a server through a TCP / IP protocol, and then current ammeter data can be displayed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric meter data acquisition. BACKGROUND

[0002] With the rapid development of modern society and economy, the demand for fine management of electricity by industrial and commercial enterprises is increasing, and the traditional manual meter reading method of electric meters has been unable to meet the efficient, accurate and real-time management needs. Therefore, various intelligent electric meter collection networking systems have emerged, such as NB wireless intelligent electric meter data collection schemes, micro-power wireless intelligent electric meter data collection schemes, and 4G external transmission unit collection schemes. However, some systems of these schemes still rely on tedious wiring work, resulting in a long construction period and high cost. SUMMARY

[0003] In order to overcome the problem that some systems of existing electric meter data acquisition still rely on tedious wiring work, resulting in a long construction period, the utility model provides a kind of intelligent electric meter data acquisition terminal equipment of base remote transmission technology.

[0004] In order to achieve the above purpose, the present disclosure provides a kind of intelligent electric meter data acquisition terminal equipment of base remote transmission technology, including infrared probe and server, and power supply, protocol conversion module, communication module and remote transmission module integrated on the same circuit board, infrared probe is attached to the infrared communication interface of electric meter, server is communicated with remote transmission module, protocol conversion module is connected with communication module and remote transmission module respectively, communication module is communicated with infrared probe, power supply is used to power supply protocol conversion module, communication module and remote transmission module.

[0005] Optionally, the circuit of the power supply includes a DC-DC converter, a resistor R1, a resistor R2, a capacitor C2, an inductor U3, a freewheeling diode D1, filter capacitors C7, C8 and C9, the two ends of the resistor R2 are connected with the output pin and the feedback pin of the DC-DC converter respectively, one end of the resistor R1 is connected with the feedback pin of the DC-DC converter, and the other end is grounded, the capacitor C2 is connected in parallel across the resistor R2, the inductor U3 is connected with the output pin of the DC-DC converter, one end of the freewheeling diode D1 is connected to the output of the inductor U3, and the other end is grounded, the filter capacitor C8 is arranged between the inductor U3 and the output pin VCC3.8, the output pin of the voltage stabilizer is connected with one end of the filter capacitor C7 and the VCC5V power supply respectively, the other end of the filter capacitor C7 is grounded, one end of the filter capacitor C9 is connected to the power input end of the DC-DC converter, and the other end is grounded.

[0006] Optionally, the circuit of the communication module comprises a communication chip U7, a filter capacitor C10, a filter capacitor C11, a terminal resistor R6, a terminal resistor R7, a protection diode U6 and a protection diode U8, the two ends of the filter capacitor C10 and the two ends of the filter capacitor C11 are connected between the VCC and the ground wire of the communication chip U7, one end of the terminal resistor R6 is connected with the B pin of the communication chip U7, and the other end is grounded, the two ends of the terminal resistor R7 are connected with the A pin and the B pin of the communication chip U7 respectively, one end of the terminal resistor R9 is connected with the A pin of the communication chip U7, and the other end is connected with the VCC 5V, one end of the protection diode U6 is connected with the B pin of the communication chip U7, and the other end is grounded, one end of the protection diode U8 is connected with the A pin of the communication chip U7, and the other end is grounded.

[0007] Optionally, the circuit of the protocol conversion module comprises a resistor R3, a resistor R4, a resistor R5, a resistor R8, a resistor R10, a resistor R11, a capacitor C17 and a triode Q1, one end of the resistor R3 is connected to 3V, the other end is connected to the base of the triode Q1 together with one end of the capacitor C17, the other end of the capacitor C17 is connected to 3V, one end of the resistor R4 is connected to the resistor R3 and one end of the capacitor C17, and the other end is connected to the collector of the triode Q1, one end of the resistor R5 is connected to the VCC 5V, and the other end is connected to the emitter of the triode Q1, one end of the resistor R8 is connected to 3V, the other end is connected to the resistor R10, the other end of the resistor R10 is connected to the emitter of the triode Q2, one end of the resistor R11 is connected to the collector of the triode Q2, and the other end is connected to the VCC 5V.

[0008] Optionally, the circuit of the remote transmission module comprises a microcontroller, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an inductor L1 and a diode U2, one end of the capacitor C1, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 is connected with the inductor L1, and the other end is grounded, one end of the inductor L1 is connected to the VCC 3.8V, one end of the inductor L1 is connected with the power input pin of the microcontroller, one end of the TVS diode U2 is connected with the inductor L1, and the other end is grounded.

[0009] The technical scheme provided by the embodiments of the present disclosure can include the following beneficial effects:

[0010] The infrared probe is aimed at and pasted to the infrared communication interface of the electric meter, the server sends the instruction of DLT645 standard protocol to the remote transmission module, the remote transmission module processes the instruction into TTL low voltage signal and transmits to the protocol conversion module, the protocol conversion module converts the TTL low voltage signal transmitted by the remote transmission module into TTL high voltage signal which can be recognized by the communication module, the communication module converts the signal into 485 communication protocol and transmits to the infrared probe, the infrared probe modulates the 485 signal into infrared signal and sends to the electric meter, after receiving the command, the electric meter returns the parameters (infrared signal) corresponding to the command, after receiving the signal sent by the electric meter, the infrared probe modulates the infrared signal into 485 communication protocol and transmits to the communication module, the communication module converts the 485 signal into TTL high voltage level signal, and then the protocol conversion module converts the TTL high voltage level signal into TTL low voltage level signal, after receiving the TTL low voltage level signal, the remote transmission module packs the signal into a data packet and uploads to the server through TCP / IP protocol, and the server checks the data through CRC, if the data is correct, the current electric meter data can be displayed, wireless communication technology is adopted, traditional wiring demand is reduced or eliminated, construction complexity is greatly reduced, wiring time is shortened, and the method is especially suitable for scenes with complex site conditions or limited wiring. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a principle block diagram of the intelligent electric meter data acquisition terminal equipment of the base remote transmission technology.

[0012] Figure 2 is a circuit diagram of the power supply in the intelligent electric meter data acquisition terminal equipment of the base remote transmission technology.

[0013] Figure 3 is a circuit diagram of the communication module in the intelligent electric meter data acquisition terminal equipment of the base remote transmission technology.

[0014] Figure 4 is a circuit diagram of the protocol conversion module in the intelligent electric meter data acquisition terminal equipment of the base remote transmission technology.

[0015] Figure 5 is a circuit diagram of the remote transmission module in the intelligent electric meter data acquisition terminal equipment of the base remote transmission technology. DETAILED DESCRIPTION

[0016] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0017] Please refer to Figures 1 to 5The disclosed embodiment provides a smart meter data acquisition terminal device based on remote transmission technology, which comprises an infrared probe, a server, a power supply, a protocol conversion module, a communication module and a remote transmission module integrated on the same circuit board. The infrared probe is attached to the infrared communication interface of the meter. The server is in communication connection with the remote transmission module. The protocol conversion module is connected with the communication module and the remote transmission module respectively. The communication module is in communication connection with the infrared probe. The power supply is used to supply power to the protocol conversion module, the communication module and the remote transmission module.

[0018] The infrared probe is precisely aimed at and attached to the acquisition interface of the meter, ensuring the stability of physical connection and the accuracy of data acquisition. The device directly takes power from the meter box. The 220V AC power is converted into low-voltage DC power through the voltage stabilizer and the power module. The server sends a DLT645 standard protocol command to the remote transmission module. The remote transmission module processes the command into a TTL low-voltage signal and transmits it to the protocol conversion module. The protocol conversion module converts the TTL low-voltage signal from the remote transmission module into a TTL high-voltage signal that can be recognized by the communication module. The communication module converts the signal into a 485 communication protocol and transmits it to the infrared probe. The infrared probe modulates the 485 signal into an infrared signal and sends it to the meter. After receiving the command, the meter returns the corresponding parameter (infrared signal). After receiving the signal from the meter, the infrared probe modulates the infrared signal into a 485 communication protocol and transmits it to the communication module. The communication module converts the 485 signal into a TTL high-voltage signal, which is then converted into a TTL low-voltage signal by the protocol conversion module. After receiving the TTL low-voltage signal, the remote transmission module packages the signal into a data packet and uploads it to the server through the TCP / IP protocol. The server checks the data through CRC to determine whether it is correct. If it is correct, the current meter data can be displayed. Wireless communication technology is used to reduce or eliminate the need for traditional wiring, significantly reducing construction complexity, shortening wiring time, and being especially suitable for complex or limited wiring scenarios. No complex wiring engineering is required, reducing the difficulty and time cost of on-site construction.

[0019] The circuit of the power supply includes a DC-DC converter, a resistor R1, a resistor R2, a capacitor C2, an inductor U3, a freewheeling diode D1, a filter capacitor C7, a filter capacitor C8 and a filter capacitor C9. The two ends of the resistor R2 are connected with the output pin and the feedback pin of the DC-DC converter respectively. One end of the resistor R1 is connected with the feedback pin of the DC-DC converter, and the other end is grounded. The capacitor C2 is connected in parallel across the resistor R2 to improve stability and reduce input power line noise. The inductor U3 is connected with the output pin of the DC-DC converter for energy storage and voltage conversion, and cooperates with the freewheeling diode D1. One end of the freewheeling diode D1 is connected to the output of the inductor U3, and the other end is grounded to provide a current freewheeling path and prevent damage to the circuit caused by the reverse electromotive force of the inductor. The filter capacitor C8 is arranged between the inductor U3 and the output pin VCC3.8 to filter out voltage ripple and provide a stable output voltage. The output pin of the voltage regulator is connected with one end of the filter capacitor C7 and the VCC5V power supply respectively, and the other end of the filter capacitor C7 is grounded. One end of the filter capacitor C9 is connected to the power input end of the DC-DC converter, and the other end is grounded.

[0020] The circuit of the communication module includes a communication chip U7, a filter capacitor C10, a filter capacitor C11, a terminal resistor R6, a terminal resistor R7, a protection diode U6 and a protection diode U8. The two ends of the filter capacitor C10 and the two ends of the filter capacitor C11 are connected between the VCC and the ground of the communication chip U7 respectively to filter the VCC5V power supply, suppress high-frequency noise and ensure stable operation of the chip. One end of the terminal resistor R6 is connected with the B pin of the communication chip U7, and the other end is grounded. The two ends of the terminal resistor R7 are connected with the A pin and the B pin of the communication chip U7 respectively. One end of the terminal resistor R9 is connected with the A pin of the communication chip U7, and the other end is connected with the VCC5V to match the characteristic impedance of the RS-485 bus, reduce signal reflection and interference. One end of the protection diode U6 is connected with the B pin of the communication chip U7, and the other end is grounded. One end of the protection diode U8 is connected with the A pin of the communication chip U7, and the other end is grounded to prevent damage to the chip caused by electrostatic discharge (ESD) or surge voltage.

[0021] The circuit of the protocol conversion module includes resistors R3, R4, R5, R8, R10, R11, capacitor C17 and transistor Q1, one end of resistor R3 is connected to 3V, the other end is connected to the base of transistor Q1 together with one end of capacitor C17, the other end of capacitor C17 is connected to 3V, one end of resistor R4 is connected to resistor R3 and one end of capacitor C17, the other end is connected to the collector of transistor Q1, one end of resistor R5 is connected to VCC 5V, the other end is connected to the emitter of transistor Q1, one end of resistor R8 is connected to 3V, the other end is connected to resistor R10, the other end of resistor R10 is connected to the emitter of transistor Q2, one end of resistor R11 is connected to the collector of transistor Q2, the other end is connected to VCC 5V. The technical effect of the device is to realize protocol conversion, specifically, through the switching action of transistors Q1 and Q2, low-voltage signals (3V) are converted into high-voltage signals (5V), and interoperation between different protocols is realized. The working principle is as follows: when the low-voltage signal passes through R3 to the base of transistor Q1, transistor Q1 is turned on, capacitor C17 is discharged, the driving signal passes through resistor R4 to the collector of transistor Q1, and then passes through the emitter of transistor Q1 to reach 5V system connected to resistor R5, thereby completing the voltage conversion of the signal; at the same time, the low-voltage signal also passes through resistor R8, resistor R10 to the emitter of transistor Q2, so that transistor Q2 is turned on, resistor R11 and VCC 5V are connected, forming a high-voltage circuit, realizing the conversion and compatibility of different protocol signal transmission.

[0022] The circuit of the remote transmission module includes a microcontroller, capacitors C1, C3, C4, C5, C6, inductor L1 and diode U2, one end of capacitors C1, C3, C4, C5 and C6 is connected to inductor L1, the other end is grounded to filter out noise. One end of inductor L1 is connected to VCC 3.8V, one end of inductor L1 is connected to the power input pin of the microcontroller, one end of TVS diode U2 is connected to inductor L1, the other end is grounded to protect the circuit.

[0023] The smart meter data acquisition terminal device based on base remote technology can have the following beneficial effects:

[0024] 1. Improve information timeliness

[0025] Through the optimized data acquisition and transmission mechanism, real-time acquisition and transmission of power consumption data are realized, ensuring efficient updating of information and meeting the needs of real-time monitoring and rapid response.

[0026] 2. Simplify construction wiring

[0027] Wireless communication technology is adopted to reduce or eliminate the need for traditional wiring, greatly reducing construction complexity and shortening wiring time, especially suitable for scenes with complex site conditions or limited wiring.

[0028] 3. Convenient maintenance

[0029] The system supports intelligent remote management, device state monitoring, parameter adjustment and fault diagnosis can be realized through remote operation and maintenance function, reduces the frequency of field maintenance, reduces the labor and time cost.

[0030] 4. Strong adaptability and expansibility

[0031] The device adopts modular design, supports multiple communication protocols, Modbus protocol TCP / IP protocol UDP protocol MQTT protocol: can flexibly expand functions according to different application scenes, meet the diversified needs of users.

[0032] The application is described through examples, and those skilled in the art know that various changes or equivalent replacements can be made to the features and examples without departing from the spirit and scope of the application. In addition, under the guidance of the application, the features and examples can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the application. Therefore, the application is not limited by the specific examples disclosed herein, and all examples falling within the scope of the claims of the application belong to the protection scope of the application.

Claims

1. A smart meter data acquisition terminal device of base remote transmission technology, characterized in that, The infrared probe and the server are integrated on the same circuit board with a power supply, a protocol conversion module, a communication module and a remote transmission module.

2. The smart metering technology data acquisition terminal device according to claim 1, wherein, The circuit of the power supply comprises a DC-DC converter, a resistor R1, a resistor R2, a capacitor C2, an inductor U3, a freewheeling diode D1, filter capacitors C7, C8 and C9, two ends of the resistor R2 are connected with an output pin and a feedback pin of the DC-DC converter respectively, one end of the resistor R1 is connected with the feedback pin of the DC-DC converter and the other end is grounded, the capacitor C2 is connected in parallel across the resistor R2, the inductor U3 is connected with the output pin of the DC-DC converter, one end of the freewheeling diode D1 is connected to the output of the inductor U3 and the other end is grounded, the filter capacitor C8 is arranged between the inductor U3 and the output pin VCC3.8, the output pin of the voltage stabilizer is connected with one end of the filter capacitor C7 and a VCC5V power supply respectively, the other end of the filter capacitor C7 is grounded, one end of the filter capacitor C9 is connected to the power input end of the DC-DC converter and the other end is grounded.

3. The smart metering technology data acquisition terminal device according to claim 2, wherein, The circuit of the communication module comprises a communication chip U7, filter capacitors C10 and C11, terminal resistors R6 and R7, protection diodes U6 and U8, two ends of the filter capacitor C10 and two ends of the filter capacitor C11 are connected between a VCC and a ground wire of the communication chip U7, one end of the terminal resistor R6 is connected with a B pin of the communication chip U7 and the other end is grounded, two ends of the terminal resistor R7 are connected with an A pin and the B pin of the communication chip U7 respectively, one end of the terminal resistor R9 is connected with the A pin of the communication chip U7 and the other end is connected with the VCC5V, one end of the protection diode U6 is connected with the B pin of the communication chip U7 and the other end is grounded, one end of the protection diode U8 is connected with the A pin of the communication chip U7 and the other end is grounded.

4. The smart metering technology data acquisition terminal device of claim 3, wherein, The circuit of the protocol conversion module comprises resistors R3, R4, R5, R8, R10, R11, a capacitor C17 and a transistor Q1, one end of the resistor R3 is connected to 3V, the other end is connected with one end of the capacitor C17 to the base of the transistor Q1, the other end of the capacitor C17 is grounded, one end of the resistor R4 is connected with the resistor R3 and one end of the capacitor C17, the other end is connected with the collector of the transistor Q1, one end of the resistor R5 is connected with the VCC5V, the other end is connected with the emitter of the transistor Q1, one end of the resistor R8 is connected to 3V, the other end is connected with the resistor R10, the other end of the resistor R10 is connected with the emitter of the transistor Q2, one end of the resistor R11 is connected with the collector of the transistor Q2, the other end is connected with the VCC5V.

5. The smart metering technology data acquisition terminal device of claim 4, wherein, The circuit of the remote transmission module includes a microcontroller, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, an inductor L1 and a diode U2, one end of the capacitor C1, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 is connected with the inductor L1, the other end is grounded, one end of the inductor L1 is connected to VCC 3.8V, one end of the inductor L1 is connected with the power input pin of the microcontroller, one end of the TVS diode U2 is connected with the inductor L1, the other end is grounded.

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