CN110853328A

CN110853328A - Smart electric meter carrier module detection device

Info

Publication number: CN110853328A
Application number: CN201911101756.4A
Authority: CN
Inventors: 田宝树; 乔路丽; 徐静; 陈德宏; 李广晨; 单宇航; 王玉君; 王蔡林; 侯俊东; 孟祥伟; 宋家琪; 崔照鑫
Original assignee: State Grid Corp of China SGCC; State Grid Liaoning Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Liaoning Electric Power Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-02-28

Abstract

The invention provides a carrier module detection device of an intelligent ammeter, which consists of a portable test box, software of the device can be in communication connection with any PC through a USB conversion serial port RS-232, a test unit and a measurement and control unit are arranged in a box body, a plurality of single-phase carrier module sockets and three-phase carrier module sockets are respectively arranged in the test unit, and two RS-232 sockets, a power socket, a power switch, a communication control module and a switching power module are arranged in the measurement and control unit. The socket and the communication control module of the test unit are both connected with the output end of the switch power supply module. The communication control module is connected with the PC through a USB conversion serial port RS-232. The device has the greatest characteristic that the device can test carrier modules of different manufacturers, different product versions and different batches in batches, and the detection efficiency is greatly improved.

Description

Smart electric meter carrier module detection device

Technical Field

The invention relates to the technical field of power detection, in particular to a batch detection device for intelligent electric meter carrier modules.

Background

An intelligent electric meter based on a power line carrier communication technology (PLC) is a novel electronic electric energy meter and mainly comprises a measuring unit, a data processing unit, a carrier transmission unit and the like. However, in the actual use process, the smart meter often has the problem of remote reading failure. The method for solving the problem on site is that the carrier module is replaced simply, so that more and more carrier modules are replaced as time goes on. The carrier modules replaced are not always bad, and the discrimination test must be carried out one by one again. In the face of a large number of carrier modules which are replaced, simple testing can be carried out only manually at present, namely the carrier modules to be tested are installed on an electric energy meter with the same communication protocol, then a controller and a handheld terminal are connected with the electric energy meter, then an AC220V power supply is accessed, and detection is carried out according to the operation steps of the handheld terminal. This detection method can detect only one carrier module at a time, and therefore, the detection efficiency is very low. Chinese patent ZL201621468623.2 discloses a "carrier module detector". The carrier module detector comprises a carrier test module, a table address setting module, a control module, a power supply module, a man-machine interaction module and the like. However, the carrier module to be tested still needs to be installed on the electric energy meter, and the meter address of the electric energy meter needs to be set to test the carrier module. The detector can only detect one carrier module at a time, so the detector has low working efficiency.

Disclosure of Invention

The invention aims to provide a detection device for a carrier module of an intelligent electric meter, aiming at overcoming the defects in the background art. The detection device is high in test speed and efficiency, can perform module test in batches, and files test data, so that data analysis and production management of products are facilitated.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a smart electric meter carrier module detection device, constitute by a portable test box, a serial communication port, portable test box is a flat box of area lid, box inside divide into about two units, one is the test unit who is used for pegging graft the carrier module of being surveyed, another is the measurement and control unit who is equipped with communication control module and switching power module, measurement and control unit has an operation panel that can lift, operation panel is equipped with two RS-232 sockets and a supply socket and switch, communication control module and switching power module dress are in the space below operation panel, be connected by the cable between test unit's socket and the communication control module, communication control module then links to each other with the PC through USB conversion serial ports RS-232, switching power module links to each other with test unit's socket and communication control module respectively.

The test unit is provided with a socket board, two sockets are arranged on the socket board, one socket is a single-phase carrier module socket, the other socket is a three-phase carrier module socket, and a corresponding PCB is arranged below each socket.

The number of the single-phase carrier module sockets is at least one, and a plurality of single-phase carrier module sockets can be arranged; at least one three-phase carrier module socket can be arranged, and a plurality of three-phase carrier module sockets can also be arranged.

The two RS-232 sockets on the panel of the measurement and control unit are respectively connected with carrier communication control modules of different series manufacturers, and the communication control modules are respectively connected to the test socket of the test unit.

The communication control module consists of a carrier copying controller and a signal attenuator which are fixed in the box body of the measurement and control unit.

The switching power supply module is connected with an alternating current power supply through a power socket on the panel of the measurement and control unit.

Compared with the prior art, the invention has the beneficial effects that:

1. the testing unit of the invention is provided with two jacks of the single/three-phase carrier module, and each jack can be provided with a plurality of sockets, therefore, the device can test the carrier modules in batches, greatly improves the efficiency of testing work, and greatly lightens the labor intensity of workers.

2. Because the panel of the measurement and control unit is provided with the two RS-232 sockets which are respectively connected with the carrier communication control modules of different series manufacturers, the device can detect the carrier modules of different series manufacturers, and further improves the utilization efficiency of the device.

3. The device is provided with corresponding detection software, can be connected with PCs on different sites, modifies related communication parameters, simulates the attenuation function of actual carrier signals, and can detect the communication capacity of single/three-phase carrier modules with all 09 and 13 protocols.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic block diagram of the circuit of the present invention.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings.

Referring to fig. 1 to 3, an embodiment of a smart meter carrier module detection device according to the present invention is composed of a portable handheld test box, which is composed of a box body 1 and a box cover 2. The inside of the box body is divided into a left unit and a right unit, one unit is a testing unit 3 used for being inserted with a tested carrier module, the other unit is a measurement and control unit 6 provided with a communication control module 4 and a switch power module 5, the measurement and control unit 6 is provided with an operation panel 7 capable of being opened, two RS-232

sockets

8 and 9, a power socket 10 and a power switch 11 are arranged on the operation panel 7, the communication control module 4 and the switch power module 5 are arranged in a space below the operation panel 7, all carrier module sockets of the testing unit 3 are connected in parallel and then connected with the output end of the switch power module 5, the input end of the communication control module 4 is also connected with the output end of the switch power module 5, and the output end of the communication control module 4 is connected with a PC 12 through a USB conversion serial port RS-232.

The test unit 3 has a socket board, and two kinds of sockets are installed on the socket board, one kind is single-phase carrier module socket 13, another kind is three-phase carrier module socket 14, all is furnished with corresponding PCB circuit board below each socket. The number of the single-phase carrier module sockets 13 is at least one, and can also be provided with a plurality of sockets, and the number of the sockets is 15; at least one or a plurality of three-phase carrier module sockets 14 are also provided, and 3 are provided in the device of the invention. Two RS-232

sockets

8 and 9 on an operation panel 7 of the measurement and control unit 6 are respectively connected with communication control modules 4 of different series manufacturers. For testing carrier modules of different series manufacturers. The communication control module 4 is composed of a signal attenuator 15 and a carrier copying controller 16, which are fixed in the box body of the measurement and control unit 6. The switching power supply module 5 is connected to an ac power supply through a power outlet 10 on the operation panel 7. The PCB at the lower part of each socket of the test unit 3 is fixed in the box body 1 through 4 screws, the socket board is printed by an integrated 3D printer, and the printed surface is polished and painted.

As shown in fig. 3, the working principle of the detection device for the carrier module of the smart meter is that a reading control instruction of the master station PC 12 is received through the USB conversion serial port RS-232, after spread spectrum modulation is performed by the carrier reading controller 16, a signal is transmitted to the low-voltage power line and then transmitted to the detected carrier module on the detection unit 3, after the detected carrier module receives the instruction, the reading control instruction is responded by a DL/T645-2007 protocol, the response message is attenuated by the signal attenuator 15 through the power line and then reaches the carrier reading controller 16, and the response message is demodulated by the carrier reading controller 16 and then is uploaded to the PC 12, thereby forming a complete carrier reading process.

The power supply of the device is AC 220V. The AC220V supplies power for the carrier wave copy controller 16, the

test module sockets

13 and 14 and the switch power supply module 5 respectively, the switch power supply module 5 converts the AC220V power supply into a DC24V power supply, the DC24V power supply is converted into a DC5V power supply through a KIA78L05 three-terminal voltage regulator, and the DC5V power supply is converted into DC3.3V power supply for the single chip microcomputer through a circuit; the other DC24V DC power supply is converted into DC12V power supply by the power conversion chip LM7812, and test power supply is provided for the DC part of each test socket through the flat cable of the PCB.

Claims

1. A carrier module detection device for an intelligent ammeter comprises a portable test box, the portable test box is characterized in that the portable test box is a flat box body with a cover, the box body is internally divided into a left unit and a right unit, one unit is a test unit for inserting a tested carrier module, the other unit is an operation unit provided with a communication control module and a switch power module, the operation unit is provided with an operation panel which can be opened, the operation panel is provided with two RS-232 sockets, a power socket and a power switch, the communication control module and the switch power module are arranged in a space below the operation panel, the sockets of the test unit are connected with the communication control module through cables, the communication control module is connected with a PC through a USB conversion serial port RS-232, and the switch power module is respectively connected with the sockets of the test unit and the communication control module.

2. The carrier module tester of claim 1, wherein the tester unit has a socket board with two types of sockets, one type being a single-phase carrier module socket and the other type being a three-phase carrier module socket, and a PCB is provided under each socket.

3. The device for detecting the carrier module of the smart meter according to claim 2, wherein the number of the single-phase carrier module sockets is at least one, and a plurality of single-phase carrier module sockets can be provided; at least one three-phase carrier module socket can be arranged, and a plurality of three-phase carrier module sockets can also be arranged.

4. The device for detecting the carrier module of the smart meter as claimed in claim 3, wherein the two RS-232 sockets on the panel of the operation unit are respectively connected with carrier communication control modules of different series manufacturers, and the communication control modules are respectively connected to the test socket of the test unit.

5. The device for detecting the carrier module of the smart meter according to claim 4, wherein the communication control module comprises a carrier reading controller and a signal attenuator, and the carrier reading controller and the signal attenuator are fixed in the box body of the operation unit.