CN112485750A - Communication module interface testing method and system for intelligent electric meter - Google Patents
Communication module interface testing method and system for intelligent electric meter Download PDFInfo
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Abstract
The invention discloses a method and a system for testing a communication module interface of an intelligent ammeter, which comprises the following steps: s1: the testing device is connected with a communication module interface of the intelligent ammeter through a thimble, the testing device is connected with the control terminal through a serial server, and intelligent ammeter communication module interface testing software is arranged in the control terminal and used for testing the communication module interface of the intelligent ammeter; s2: the intelligent electric meter is powered on, and the control terminal sends a test instruction to the test device; s3: the testing device tests the corresponding communication module interface according to the testing instruction; s4: the test device returns the test result and the ammeter number to the control terminal; s5: the control terminal displays and stores the test result; the serial server is arranged, so that the communication module interfaces of a plurality of intelligent electric meters can be tested at the same time, and the testing efficiency is improved; and respectively testing the data communication interface, the STA interface, the EVENTOUT interface, the/SET interface and the/RST interface, and quickly eliminating the communication hidden trouble of the intelligent electric meter.
Description
Technical Field
The invention relates to the technical field of electric energy meter detection, in particular to a method and a system for testing a communication module interface of an intelligent electric meter.
Background
Since the national grid intelligent electric energy meter starts to be popularized and applied in 2010, the demand of the electric energy meter with the communication module function is always high, and the electric energy meter with the communication module function is adopted in 19 years. The national network technical specification has standard regulation on the interface of the intelligent electric energy meter communication module, at present, a carrier module is generally adopted in the production detection of the intelligent electric energy meter to copy data to detect the data communication function of the electric energy meter, the carrier communication testing efficiency is low, the/SET,/RST, STA and EVENTOUT interface functions specified by the national network technical specification cannot well realize detection, and the intelligent electric energy meters produced in batches may have hidden communication function hazards. Therefore, it is very important to design a method and a device for testing the interface of the communication module of the smart meter.
For example, chinese patent application No. CN201310269666.2, having application date of 2013, 06 and 29, discloses a method and an apparatus for testing a meter reading port of an intelligent electric meter, where a hand-held meter reading machine is used to test the meter reading port of the intelligent electric meter, and the testing steps are as follows: 1) the handheld meter reading machine is connected with the intelligent electric meter by adopting a communication line, namely a USB end of a USB-to-RS 485 switching line is connected with the handheld meter reading machine, and an RS485 end is connected with a meter reading port of the intelligent electric meter; 2) setting parameters, inputting a communication address of the intelligent electric meter, and establishing a communication link between the handheld meter reading machine and the intelligent electric meter; 3) the handheld meter reading machine sends a meter reading request to the intelligent electric meter; 4) if the handheld meter reading machine collects the current electric quantity data of the intelligent electric meter, displaying the related data, otherwise, not displaying the data; 5) and judging whether the meter reading port of the intelligent electric meter is normal or not. According to the test method for the meter reading port of the intelligent electric meter, whether the communication of the intelligent electric meter is normal is only tested, the port is not effectively tested, and the problem of hidden communication danger caused by port faults is still not solved.
Disclosure of Invention
The invention mainly solves the problem that the intelligent electric meter has hidden danger of communication function in the prior art; the method and the system for testing the communication module interface of the intelligent electric meter can be used for quickly detecting whether the communication interface of the intelligent electric meter is normal or not, are easy to operate and high in testing efficiency, time cost is reduced, and production efficiency and quality are improved.
The technical problem of the invention is mainly solved by the following technical scheme: a test method for a communication module interface of an intelligent ammeter comprises the following steps:
s1: the testing device is connected with a communication module interface of the intelligent ammeter through a thimble, the testing device is connected with the control terminal through a serial server, and intelligent ammeter communication module interface testing software is arranged in the control terminal and used for testing the communication module interface of the intelligent ammeter;
s2: the intelligent electric meter is powered on, and the control terminal sends a test instruction to the test device;
s3: the testing device tests the corresponding communication module interface according to the testing instruction;
s4: the test device returns the test result and the ammeter number to the control terminal;
s5: and the control terminal displays and stores the test result. The testing device is connected with the communication module interface of the intelligent electric meter in a mode of connecting the thimble, the connection is more convenient and quicker, the serial server is adopted, the communication module interface tests of a plurality of intelligent electric meters can be carried out simultaneously, the testing efficiency is improved, the whole testing method is simple in operation, whether the communication interface of the intelligent electric meter is normal or not can be quickly detected, the communication hidden danger of the intelligent electric meter is eliminated, and the production efficiency and the quality are improved.
Preferably, the communication module interface test includes a data communication interface test, a STA interface test, an event out interface test, a/SET interface test, and a/RST interface test.
Preferably, the method for testing the data communication interface comprises the following steps:
a. the control terminal obtains the current time and forms a clock instruction through intelligent electric meter communication module interface test software;
b. sending the clock instruction to a testing device through a serial port server, and transmitting the clock instruction to the intelligent ammeter by the testing device through an RXD interface;
c. the intelligent ammeter forms a return instruction according to the clock instruction, the current time value, the historical moment value and ammeter parameters of the historical moment value, and returns to the control terminal through the TXD interface and the serial server;
d. and analyzing the return instruction by the intelligent electric meter communication module interface test software, judging whether the current time of the intelligent electric meter is correct or not, if the current time value of the intelligent electric meter is within an error range, finding the electric meter parameter value at the moment stored in the control terminal according to a certain historical moment value, comparing the electric meter parameter value with the value in the return instruction, if the parameter value is consistent, the data communication interface is normal, and otherwise, the data communication interface is abnormal.
Preferably, the method for testing the STA interface and the EVENTOUT interface includes:
s311: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s312: the test instruction is sent to the test device through the serial server, the test device transmits the test instruction to the intelligent ammeter through the RXD interface, and meanwhile, the STA interface and the EVENTOUT interface are output to be high-impedance;
s313: and the electric energy meter detects the states of the STA interface and the EVENTOUT interface after receiving the test instruction, and returns the detected state data to the control terminal through the test device, if the states of the STA interface and the EVENTOUT interface are detected to be in a high impedance state, the STA interface and the EVENTOUT interface are normal, otherwise, the STA interface and the EVENTOUT interface are abnormal.
Preferably, the method for testing the/SET interface and/or the RST interface includes:
s321: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s322: sending a test instruction to a test device through a serial server, transmitting the test instruction to an intelligent ammeter through an RXD interface by the test device, and setting a/SET interface and/RST interface at a low level after the intelligent ammeter receives the test instruction;
s323: the detection device detects the state of the/SET interface and/RST interface and returns the detected state data to the control terminal, if the detection device returns that the state of the/SET interface and/RST interface is low level, the/SET interface and/RST interface are normal, otherwise, the detection device is abnormal.
The utility model provides a smart electric meter's communication module interface test system, includes a plurality of testing arrangement, RS485 module, serial server, control terminal and storage module, a plurality of testing arrangement passes through the thimble with smart electric meter's communication module interface respectively and is connected, serial server passes through the RS485 module with testing arrangement and is connected, control terminal is connected with serial server, smart electric meter communication module interface test software has in the control terminal for test smart electric meter's communication module interface, storage module is connected with control terminal, storage module storage has smart electric meter's historical ammeter parameter information. Control terminal still is provided with display module, carries out visual display with the test result, and whether the communication interface that supplies the audio-visual observation smart electric meter of operating personnel is normal, also can carry out the test result through the form of different colours and show, utilizes serial servers, can carry out a plurality of smart electric meter's communication module interface test simultaneously, improves efficiency of software testing, gets rid of smart electric meter's communication hidden danger fast.
The invention has the beneficial effects that: (1) the serial server is arranged, so that the communication module interfaces of a plurality of intelligent electric meters can be tested at the same time, and the testing efficiency is improved; (2) respectively testing a data communication interface, an STA interface, an EVENTOUT interface, a/SET interface and a/RST interface, and quickly eliminating the communication hidden trouble of the intelligent ammeter; (3) the whole method is easy to operate, high in testing efficiency, capable of effectively reducing time cost and improving production efficiency and quality.
Drawings
Fig. 1 is a block diagram of a test system according to an embodiment of the present invention.
In the figure, 1 is an intelligent ammeter, 2 is a testing device, 3 is a serial server, and 4 is a control terminal.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): a test method for a communication module interface of an intelligent ammeter comprises the following steps:
s1: the testing device is connected with a communication module interface of the intelligent ammeter through a thimble, the testing device is connected with the control terminal through a serial server, and intelligent ammeter communication module interface testing software is arranged in the control terminal and used for testing the communication module interface of the intelligent ammeter;
s2: the intelligent electric meter is powered on, and the control terminal sends a test instruction to the test device;
s3: the testing device tests the corresponding communication module interface according to the testing instruction;
s4: the test device returns the test result and the ammeter number to the control terminal;
s5: and the control terminal displays and stores the test result.
The communication module interface test comprises a data communication interface test, an STA interface test, an EVENTOUT interface test, a/SET interface test and a/RST interface test.
The method for testing the data communication interface comprises the following steps:
a. the control terminal obtains the current time and forms a clock instruction through intelligent electric meter communication module interface test software;
b. sending the clock instruction to a testing device through a serial port server, and transmitting the clock instruction to the intelligent ammeter by the testing device through an RXD interface;
c. the intelligent ammeter forms a return instruction according to the clock instruction, the current time value, the historical moment value and ammeter parameters of the historical moment value, and returns to the control terminal through the TXD interface and the serial server;
d. and analyzing the return instruction by the intelligent electric meter communication module interface test software, judging whether the current time of the intelligent electric meter is correct or not, if the current time value of the intelligent electric meter is within an error range, finding the electric meter parameter value at the moment stored in the control terminal according to a certain historical moment value, comparing the electric meter parameter value with the value in the return instruction, if the parameter value is consistent, the data communication interface is normal, and otherwise, the data communication interface is abnormal.
The STA interface test method comprises the following steps:
s311: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s312: sending a test instruction to a test device through a serial server, transmitting the test instruction to the intelligent ammeter by the test device through an RXD interface, and outputting a high impedance through an STA interface;
s313: and the electric energy meter detects the state of the STA interface after receiving the test instruction, and returns the detected state data to the control terminal through the test device, if the STA interface is detected to be in a high-impedance state, the STA interface is normal, otherwise, the STA interface is abnormal. The reason for testing the STA interface is that the in-meter relay and the communication module adopt the same power supply, the voltage of the power supply can be changed when the in-meter relay is switched on or switched off, although the communication interface of the intelligent electric meter can also transmit data, errors can be generated to a certain extent to cause communication hidden dangers, the state of the STA interface needs to be detected, whether data communication is carried out by the meter or not is judged, and if the data communication is carried out, the in-meter relay is forbidden to be switched on or switched off.
The method for testing the/SET interface and/RST interface comprises the following steps:
s321: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s322: sending a test instruction to a test device through a serial server, transmitting the test instruction to an intelligent ammeter through an RXD interface by the test device, and setting a/SET interface and/RST interface at a low level after the intelligent ammeter receives the test instruction;
s323: the detection device detects the state of the/SET interface and/RST interface and returns the detected state data to the control terminal, if the detection device returns that the state of the/SET interface and/RST interface is low level, the/SET interface and/RST interface are normal, otherwise, the detection device is abnormal.
The EVENTOUT interface test method comprises the following steps:
s331: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s332: the testing device transmits the testing instruction to the intelligent ammeter through the RXD interface and outputs the high resistance through the EVENTOUT interface;
s333: and the electric energy meter detects the state of the EVENTOUT interface after receiving the test instruction, and returns the detected state data to the control terminal through the test device, if the state of the EVENTOUT interface is detected to be in a high impedance state, the EVENTOUT interface is normal, otherwise, the EVENTOUT interface is abnormal.
The utility model provides a smart electric meter's communication module interface test system, as shown in figure 1, including a plurality of testing arrangement, the RS485 module, serial server, control terminal and storage module, a plurality of testing arrangement passes through the thimble with smart electric meter's communication module interface respectively and is connected, serial server passes through the RS485 module with testing arrangement and is connected, control terminal is connected with serial server, smart electric meter communication module interface test software has in the control terminal, a communication module interface for testing smart electric meter, storage module is connected with control terminal, the storage module storage has smart electric meter's historical ammeter parameter information.
In the specific application, the testing device is connected with the intelligent electric meter to be tested through ejector pins, the connection is convenient and quick, an operator generates a testing instruction through intelligent electric meter communication module interface testing software of the control terminal, tests the data communication interface, the STA interface, the EVENTOUT interface, the/SET interface and/RST interface respectively, returns the testing result to the control terminal, displays different colors through a display screen to visually display, judges whether the interface is abnormal or not, and the control terminal is a computer.
The serial server is arranged, so that the communication module interfaces of a plurality of intelligent electric meters can be tested at the same time, and the testing efficiency is improved; respectively testing a data communication interface, an STA interface, an EVENTOUT interface, a/SET interface and a/RST interface, and quickly eliminating the communication hidden trouble of the intelligent ammeter; the whole method is easy to operate, high in testing efficiency, capable of effectively reducing time cost and improving production efficiency and quality.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (6)
1. A communication module interface test method of an intelligent ammeter is characterized by comprising the following steps:
s1: the testing device is connected with a communication module interface of the intelligent ammeter through a thimble, the testing device is connected with the control terminal through a serial server, and intelligent ammeter communication module interface testing software is arranged in the control terminal and used for testing the communication module interface of the intelligent ammeter;
s2: the intelligent electric meter is powered on, and the control terminal sends a test instruction to the test device;
s3: the testing device tests the corresponding communication module interface according to the testing instruction;
s4: the test device returns the test result and the ammeter number to the control terminal;
s5: and the control terminal displays and stores the test result.
2. The method for testing the communication module interface of the smart meter according to claim 1,
the communication module interface test comprises a data communication interface test, an STA interface test, an EVENTOUT interface test, a/SET interface test and a/RST interface test.
3. The method for testing the communication module interface of the smart meter according to claim 2,
the method for testing the data communication interface comprises the following steps:
a. the control terminal obtains the current time and forms a clock instruction through intelligent electric meter communication module interface test software;
b. sending the clock instruction to a testing device through a serial port server, and transmitting the clock instruction to the intelligent ammeter by the testing device through an RXD interface;
c. the intelligent ammeter forms a return instruction according to the clock instruction, the current time value, the historical moment value and ammeter parameters of the historical moment value, and returns to the control terminal through the TXD interface and the serial server;
d. and analyzing the return instruction by the intelligent electric meter communication module interface test software, judging whether the current time of the intelligent electric meter is correct or not, if the current time value of the intelligent electric meter is within an error range, finding the electric meter parameter value at the moment stored in the control terminal according to a certain historical moment value, comparing the electric meter parameter value with the value in the return instruction, if the parameter value is consistent, the data communication interface is normal, and otherwise, the data communication interface is abnormal.
4. The method for testing the communication module interface of the smart meter according to claim 2 or 3,
the method for testing the STA interface and the EVENTOUT interface comprises the following steps:
s311: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s312: the test instruction is sent to the test device through the serial server, the test device transmits the test instruction to the intelligent ammeter through the RXD interface, and meanwhile, the STA interface and the EVENTOUT interface are output to be high-impedance;
s313: and the electric energy meter detects the states of the STA interface and the EVENTOUT interface after receiving the test instruction, and returns the detected state data to the control terminal through the test device, if the states of the STA interface and the EVENTOUT interface are detected to be in a high impedance state, the STA interface and the EVENTOUT interface are normal, otherwise, the STA interface and the EVENTOUT interface are abnormal.
5. The method for testing the communication module interface of the smart meter according to claim 2 or 3,
the method for testing the/SET interface and the/RST interface comprises the following steps:
s321: the control terminal generates a test instruction through intelligent electric meter communication module interface test software;
s322: sending a test instruction to a test device through a serial server, transmitting the test instruction to an intelligent ammeter through an RXD interface by the test device, and setting a/SET interface and/RST interface at a low level after the intelligent ammeter receives the test instruction;
s323: the detection device detects the state of the/SET interface and/RST interface and returns the detected state data to the control terminal, if the detection device returns that the state of the/SET interface and/RST interface is low level, the/SET interface and/RST interface are normal, otherwise, the detection device is abnormal.
6. A communication module interface test system of a smart meter, which adopts the communication module interface test method of the smart meter according to any one of claims 1 to 5, and is characterized by comprising
A plurality of testing arrangement, RS485 module, serial server, control terminal and storage module, a plurality of testing arrangement passes through the thimble with smart electric meter's communication module interface respectively and is connected, serial server passes through the RS485 module with testing arrangement and is connected, control terminal is connected with serial server, smart electric meter communication module interface test software has in the control terminal for test smart electric meter's communication module interface, storage module is connected with control terminal, the storage module storage has smart electric meter's historical ammeter parameter information.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949618A (en) * | 2021-09-01 | 2022-01-18 | 安徽电信规划设计有限责任公司 | Big data-based communication fault early warning system |
| WO2024082075A1 (en) * | 2022-10-17 | 2024-04-25 | 福建网能科技开发有限责任公司 | Smart terminal hardware interface test system, and test method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6665757B1 (en) * | 1999-04-08 | 2003-12-16 | Matsushita Electric Industrial Co., Ltd. | Communication interface having a master activating/deactivating a first signal with a clock signal after a predetermined time after a slave activating/deactivating the first signal |
| JP2005142643A (en) * | 2003-11-04 | 2005-06-02 | Seiko Epson Corp | Interface circuit and electronic equipment |
| US20060227717A1 (en) * | 2005-03-17 | 2006-10-12 | Toshiba America Research, Inc. | Real-time comparison of quality of interfaces |
| CN202551073U (en) * | 2012-05-07 | 2012-11-21 | 石家庄供电公司 | Serial port communication channel tester in power system |
| CN104240493A (en) * | 2014-09-17 | 2014-12-24 | 国家电网公司 | Detection equipment and detection method for single-phase carrier module of intelligent meter |
| CN106685479A (en) * | 2017-01-05 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Method and system for fault excitation in RS485 communication of electric energy meter |
| US20180188346A1 (en) * | 2017-01-03 | 2018-07-05 | San Diego Gas & Electric Company | Systems and Methods for Verifying Sub Metering Accuracy for Electric Vehicle Charging Stations |
| CN108508308A (en) * | 2018-05-28 | 2018-09-07 | 南方电网科学研究院有限责任公司 | Automatic testing device with low-voltage meter reading power consumption loading and interchangeability functions |
| CN208401842U (en) * | 2018-08-15 | 2019-01-18 | 鼎信信息科技有限责任公司 | A kind of 230MHz LoRa built-in module meeting southern network mark standard |
| CN110554940A (en) * | 2019-08-02 | 2019-12-10 | 安徽南瑞中天电力电子有限公司 | Serial port detection tool and method based on electric energy meter communication |
-
2020
- 2020-11-09 CN CN202011240026.5A patent/CN112485750B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6665757B1 (en) * | 1999-04-08 | 2003-12-16 | Matsushita Electric Industrial Co., Ltd. | Communication interface having a master activating/deactivating a first signal with a clock signal after a predetermined time after a slave activating/deactivating the first signal |
| JP2005142643A (en) * | 2003-11-04 | 2005-06-02 | Seiko Epson Corp | Interface circuit and electronic equipment |
| US20060227717A1 (en) * | 2005-03-17 | 2006-10-12 | Toshiba America Research, Inc. | Real-time comparison of quality of interfaces |
| CN202551073U (en) * | 2012-05-07 | 2012-11-21 | 石家庄供电公司 | Serial port communication channel tester in power system |
| CN104240493A (en) * | 2014-09-17 | 2014-12-24 | 国家电网公司 | Detection equipment and detection method for single-phase carrier module of intelligent meter |
| US20180188346A1 (en) * | 2017-01-03 | 2018-07-05 | San Diego Gas & Electric Company | Systems and Methods for Verifying Sub Metering Accuracy for Electric Vehicle Charging Stations |
| CN106685479A (en) * | 2017-01-05 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Method and system for fault excitation in RS485 communication of electric energy meter |
| CN108508308A (en) * | 2018-05-28 | 2018-09-07 | 南方电网科学研究院有限责任公司 | Automatic testing device with low-voltage meter reading power consumption loading and interchangeability functions |
| CN208401842U (en) * | 2018-08-15 | 2019-01-18 | 鼎信信息科技有限责任公司 | A kind of 230MHz LoRa built-in module meeting southern network mark standard |
| CN110554940A (en) * | 2019-08-02 | 2019-12-10 | 安徽南瑞中天电力电子有限公司 | Serial port detection tool and method based on electric energy meter communication |
Non-Patent Citations (1)
| Title |
|---|
| 步志文 等: "智能电能表并行载波通讯测试方法的研究", 《计算技术与自动化》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949618A (en) * | 2021-09-01 | 2022-01-18 | 安徽电信规划设计有限责任公司 | Big data-based communication fault early warning system |
| CN113949618B (en) * | 2021-09-01 | 2023-08-29 | 安徽电信规划设计有限责任公司 | Communication fault early warning system based on big data |
| WO2024082075A1 (en) * | 2022-10-17 | 2024-04-25 | 福建网能科技开发有限责任公司 | Smart terminal hardware interface test system, and test method thereof |
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