CN111342865A - Power line carrier communication module production test system - Google Patents
Power line carrier communication module production test system Download PDFInfo
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- CN111342865A CN111342865A CN202010288720.8A CN202010288720A CN111342865A CN 111342865 A CN111342865 A CN 111342865A CN 202010288720 A CN202010288720 A CN 202010288720A CN 111342865 A CN111342865 A CN 111342865A
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- power line
- line carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
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Abstract
The invention discloses a production test system of a power line carrier communication module, which comprises a singlechip and a copying controller with a standard power line carrier communication module; the electric energy meter semi-finished product with the power line carrier communication module to be tested is communicated with the copying controller by adopting power line carrier, and loop test is realized between the electric energy meter semi-finished product and the copying controller under the control of the singlechip; the control switch of the electric energy meter semi-finished product power supply is controlled by the single chip microcomputer; detecting a current detection circuit of the power line carrier communication module to be detected, wherein the output of the current detection circuit is collected by the singlechip; and the attenuator is controlled by the single chip microcomputer and is arranged on a power line carrier circuit between the electric energy meter semi-finished product and the copying controller. The invention adopts a single chip microcomputer to realize automatic test of the power line carrier communication module, overcomes the defect of labor cost increase in the existing manual test, and meets the requirements of users.
Description
Technical Field
The invention relates to the field of power line carrier communication product production, in particular to a power line carrier communication module production test system.
Background
The low-voltage distribution network is an energy transmission network with the most users and the most wide distribution, and the power line carrier communication is a communication mode for information transmission by utilizing the existing power line network. The intelligent electric power meter can be used for electric power management, lighting control, heating and refrigerating system control, remote meter reading, an alarm system and an intelligent community.
At present, a power line carrier communication module is arranged in a power terminal such as an electric energy meter, and transmits power consumption data or other power parameters acquired by the power terminal such as the electric energy meter to a background through a power line carrier.
At present, a power line carrier communication module needs to be tested when being produced and delivered from a factory, and the main indexes of the test are as follows: receiving sensitivity, transmitting power, static current, dynamic current, zero crossing point accuracy, quartz crystal consistency and the like.
Chinese patent publication No. CN 205070993U discloses a power line carrier communication module testing device, which includes a high-frequency filter, an isolation transformer, a one-stage or multi-stage testing module, a debugging device, a carrier receiver, a spectrum analyzer, and an oscilloscope connected to a power line; each test module comprises a power line input interface, a power line output interface, a debugging interface and a carrier signal output interface; the input end of the high-frequency filter is connected with the power line; the output end of the high-frequency filter is connected with the input end of the isolation transformer; the output end of the isolation transformer is connected with the power line input interface of the first-stage test module; the output end of the debugging device is connected with the debugging interface of each test module; the input end of the carrier receiver is connected with the carrier signal output interface of each test module; if the multistage test module exists, the power line input interface of the next stage test module is connected with the power line output interface of the previous stage test module; the output end of the carrier receiver is connected with a spectrum analyzer and an oscilloscope; the test module comprises an attenuator, a carrier communication module interface, a direct connection switch, an attenuation switch, a carrier communication module access switch, a carrier communication module debugging switch and a carrier signal output switch; the input end of the direct connection switch and the input end of the attenuation switch are connected with the power line input interface; the output end of the attenuation switch is connected with the input end of the attenuator; the output end of the direct connection switch, the output end of the attenuator, the output end of the carrier communication module access switch and the input end of the carrier signal output switch are connected with the power line output interface; the output end of the carrier signal output switch is connected with the carrier signal output port; the input end of the carrier communication module access switch is connected with the output end of the carrier communication module interface; the input end of the carrier communication module interface is connected with the output end of the carrier communication module debugging switch; the input end of the carrier communication module debugging switch is connected with the debugging interface.
The power line carrier communication module testing device provides an undisturbed environment for the test of carrier communication by arranging the high-frequency filter and the isolation transformer; through the connection of the multi-stage test modules and the adjustment of the direct connection switch and the attenuation switch in the multi-stage test modules, a high-simulation multi-stage attenuation effect can be obtained, and the test of the carrier communication module is facilitated; the multi-stage test module is connected, and the carrier communication module access switch and the carrier communication module debugging switch are adjusted, so that the joint test of a plurality of carrier communication modules can be performed; networking tests can be performed by connecting a concentrator to the socket. However, the power line carrier communication module testing device adopts a spectrum analyzer, an oscilloscope and the like, needs manual operation, is high in cost, and cannot meet the requirement of a factory on equipment intellectualization.
Disclosure of Invention
The invention provides a power line carrier communication module production test system aiming at the problems that the existing power line carrier communication module test device is low in intelligentization degree and cannot meet the requirements of factory production tests.
The technical scheme adopted by the invention for realizing the technical purpose is as follows: a power line carrier communication module production test system comprises a single chip microcomputer and a copy controller with a standard power line carrier communication module; the electric energy meter semi-finished product with the power line carrier communication module to be tested is communicated with the copying controller by adopting power line carrier, and loop test is realized between the electric energy meter semi-finished product and the copying controller under the control of the singlechip; the control switch of the electric energy meter semi-finished product power supply is controlled by the single chip microcomputer;
detecting a current detection circuit of the power line carrier communication module to be detected, wherein the output of the current detection circuit is collected by the singlechip;
and the attenuator is controlled by the single chip microcomputer and is arranged on a power line carrier circuit between the electric energy meter semi-finished product and the copying controller.
The invention adopts a single chip microcomputer to realize automatic test of the power line carrier communication module, overcomes the defect of labor cost increase in the existing manual test, and meets the requirements of users.
Further, in the above power line carrier communication module production test system: the system also comprises a one-out-of-multiple module which is used for connecting any one of the electric energy meter semi-finished products connected in parallel between the single chip microcomputer and the copy controller to realize loop test, wherein the one-out-of-multiple module is controlled by the single chip microcomputer.
Further, in the above power line carrier communication module production test system: the electric energy meter scanning device is characterized by further comprising a scanning gun for scanning two-dimensional codes or bar codes of electric energy meter semi-finished products with the power line carrier communication modules to be detected, and the scanning gun is connected with the single chip microcomputer.
Further, in the above power line carrier communication module production test system: the display is connected with the single chip microcomputer.
The invention is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is a test topology diagram of a power line carrier communication module production test system according to the present invention.
FIG. 2 is a block diagram of a single chip microcomputer of the power line carrier communication module production test system.
Fig. 3 is a test chart of the power line carrier communication module production test system of the present invention.
Fig. 4 is a power supply control circuit diagram in the power carrier communication module production test system of the present invention.
Fig. 5 is a circuit diagram of current detection in the power carrier communication module production test system of the present invention.
Detailed Description
Embodiment 1, as shown in fig. 1, this embodiment is a power line carrier communication module production test system, including a single chip microcomputer, as shown in fig. 2, having a standard power line carrier communication module controller; the electric energy meter semi-finished product with the power line carrier communication module to be tested is communicated with the copying controller by adopting power line carrier, and loop test is realized between the electric energy meter semi-finished product and the copying controller under the control of the singlechip; the control switch of the electric energy meter semi-finished product power supply controlled by the single chip microcomputer is also included; the test process is realized under the control of a single chip microcomputer, and the test system is a full-automatic test system. As shown in fig. 1, a single chip microcomputer is used as a communication terminal, a power line carrier communication module in a semi-finished electric energy meter is used as a communication interface device to send or receive data, and the power line carrier communication module is tested. In the electric energy meter, after the power line carrier communication module is used for carrying out power line carrier modulation on data to be transmitted, the test is carried out by the power line carrier to the copy controller, the single chip is used as a data communication terminal to generate communication data, the power line carrier module (namely, the module to be tested) in the semi-finished product is used for transmitting the communication data through the power line carrier, and the power line carrier module (namely, the module to be tested) in the semi-finished product is used for transmitting the communication data, the electric energy meter and the reading controller of the semi-finished product are physically connected by adopting a power line, in order to test the sensitivity of the module to be tested, an attenuator is required to be arranged on the section of the power line, of course, a coupler is required when the two ends of the power line are connected with an electric energy meter or a meter reading controller, these devices including 2 couplers, power lines, attenuators, and a copy controller (a built-in standard power line carrier communication module) are all standard devices, the single chip microcomputer controls the attenuator to control the attenuation condition of the power line so as to realize the sensitivity test.
The embodiment also comprises a control circuit for controlling the power supply of the module to be tested, and the singlechip controls the power-on of the module to be tested when the test is needed. The power control circuit is shown in fig. 4. After the power line carrier communication module to be tested is installed in the semi-finished electric energy meter and a test system is built, an enable signal ENB is generated by the single chip microcomputer to enable the triode Q1 to be conducted, so that a relay U1 enables a power supply to be added to the semi-finished electric energy meter, the tested module can work after being electrified, the single chip microcomputer can send specified information to the reading and controlling device through the tested module by utilizing power line carrier communication, the reading and controlling device receives a carrier signal by utilizing a standard power line carrier module and demodulates the carrier signal and then inputs the carrier signal into the single chip microcomputer, meanwhile, the single chip microcomputer can also send information to the outside by utilizing the standard power line carrier module in the reading and controlling device, the power line carrier signal is received by the power line carrier module to be tested in the semi-finished electric energy meter, the demodulated carrier signal is sent to the single chip microcomputer through an I/O port of the single chip microcomputer to realize, the received information is compared with the improved information in the singlechip to judge the error rate of the information, and the error rate is generally 0, so that the singlechip controls the attenuator to increase the attenuation until the receiver can not effectively demodulate the information, and the sensitivity of the module to be detected can be determined by detecting the level of the carrier side of the module to be detected. In this embodiment, as shown in fig. 3, 4 modules to be tested can be automatically tested at the same time, so that there is one power panel and 4 power control circuits shown in fig. 4, and during testing, the single chip generates enable signals ENB for four such circuits in sequence, respectively, so that the four modules to be tested are detected respectively. In addition, the I/O end of each electric energy meter can be connected into the single chip microcomputer in sequence by adopting a circuit at the I/O end of the electric energy meter.
In the embodiment, dynamic current and static current are required to be tested, so that the power line carrier communication module to be tested is also provided with a current detection circuit, and the output of the current detection circuit is collected by the single chip microcomputer; as shown in fig. 5. The circuit diagram is a current detection circuit of a 12V power supply on the electric energy meter, and practically, the current detection of a 5V power supply in the electric energy meter can also refer to the circuit. As shown in fig. 5, the current output by the 12V power supply is amplified by voltage sampling through a resistor R5 of 100m Ω and a chip U2, and is output to the ADC of the single chip for sampling, and the single chip obtains the current by matching the sampled voltage with a software algorithm therein. The static current and the dynamic current are calculated by the same method, and the static current refers to the current when the module normally works and does not send a carrier signal. The dynamic current refers to the current when the module is working normally to send carrier signals.
In practice, the single chip microcomputer is arranged on a main control board, one module from multiple modules is arranged on the main control board, multiple modules to be tested can be selected to be tested under the control of the single chip microcomputer, as shown in fig. 3, the four modules to be tested can be placed into a detection loop at the same time, the single chip microcomputer controls only one module to be tested at the same time, and all the modules to be tested are sequentially detected.
In addition, in the system of this embodiment, still include the scanning rifle of the two-dimensional code or the bar code of the electric energy meter semi-manufactured goods that has the power line carrier communication module that awaits measuring, the scanning rifle links to each other with the singlechip. In production practice, once each power line carrier module is produced in a workshop, a two-dimensional code or a bar code is pasted on the workshop, a unique ID representing the power line carrier is stored in the two-dimensional code or the bar code, and a test record can be recorded under the ID during testing, so that the singlechip can record the ID of the power line carrier module through a scanning gun of the two-dimensional code or the bar code during testing.
In addition, in order to make the test visual, still include by the LCD of singlechip drive.
The detection process using the system of the present embodiment is as follows:
1. and powering on the system 220vac, operating the single chip microcomputer, opening a test switch and starting testing.
2. After one piece of power line carrier module to be tested is scanned by a scanning gun of a two-dimensional code or a bar code, the ID of the power line carrier module to be tested is stored in a memory on the single chip microcomputer.
3. And installing the power line carrier module to be tested into the electric energy meter of the semi-finished product in the test loop.
4. The singlechip controls the switch to be turned on to supply power to the module to be tested and to provide an address for the module to be tested through IO, and the module receives a response.
5. And the static current of the module to be detected is detected and is supplied to an ADC of the singlechip for sampling and calculating the static current.
6. The single chip microcomputer sends a receiving command to the copying controller through 485 to 232, so that the copying controller copies the address of the module to be tested, the copying controller sends a receiving carrier signal to the module to be tested through a power line, the module to be tested receives the signal and responds to the carrier signal to send the copying controller, and the copying controller receives the signal and sends data to the single chip microcomputer. This completes one round of testing.
In the loop test, the carrier signal passes through the coupler and the attenuator, the communication cannot be realized when the value of the attenuator is larger than a certain value, and the receiving sensitivity is determined according to the attenuation value. The single chip will display the test result to the liquid crystal screen.
Claims (4)
1. A power line carrier communication module production test system comprises a single chip microcomputer and a copy controller with a standard power line carrier communication module; the electric energy meter semi-finished product with the power line carrier communication module to be tested is communicated with the copying controller by adopting power line carrier, and loop test is realized between the electric energy meter semi-finished product and the copying controller under the control of the singlechip; the method is characterized in that:
the control switch of the electric energy meter semi-finished product power supply is controlled by the single chip microcomputer;
detecting a current detection circuit of the power line carrier communication module to be detected, wherein the output of the current detection circuit is collected by the singlechip;
and the attenuator is controlled by the single chip microcomputer and is arranged on a power line carrier circuit between the electric energy meter semi-finished product and the copying controller.
2. The power carrier communication module production test system of claim 1, wherein: the system also comprises a one-out-of-multiple module which is used for connecting any one of the electric energy meter semi-finished products connected in parallel between the single chip microcomputer and the copy controller to realize loop test, wherein the one-out-of-multiple module is controlled by the single chip microcomputer.
3. The power carrier communication module production test system of claim 1, wherein: the electric energy meter scanning device is characterized by further comprising a scanning gun for scanning two-dimensional codes or bar codes of electric energy meter semi-finished products with the power line carrier communication modules to be detected, and the scanning gun is connected with the single chip microcomputer.
4. The power carrier communication module production test system of claim 1, wherein: the display is connected with the single chip microcomputer.
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| CN202010288720.8A CN111342865A (en) | 2020-04-14 | 2020-04-14 | Power line carrier communication module production test system |
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| CN202010288720.8A CN111342865A (en) | 2020-04-14 | 2020-04-14 | Power line carrier communication module production test system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039557A (en) * | 2020-09-07 | 2020-12-04 | 陕西银河电力仪表股份有限公司 | High-speed power line carrier testing system and method for High Performance Liquid Chromatography (HPLC) |
| CN113872639A (en) * | 2021-09-24 | 2021-12-31 | 广东电网有限责任公司 | Function test method of power line carrier module, electronic device and storage medium |
| CN113890647A (en) * | 2021-09-09 | 2022-01-04 | 国网上海市电力公司 | Communication detection method and system for anti-theft data of electric energy meter |
| CN114421996A (en) * | 2022-03-28 | 2022-04-29 | 欧智通科技股份有限公司 | Anti-attenuation test system of PLC signal |
| CN114726404A (en) * | 2022-02-24 | 2022-07-08 | 江苏芯云电子科技有限公司 | Automatic detection system and method for broadband power line carrier communication module |
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