CN114460525A - Clamp function failure monitoring device for detecting laboratory electrical measuring equipment - Google Patents
Clamp function failure monitoring device for detecting laboratory electrical measuring equipment Download PDFInfo
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- CN114460525A CN114460525A CN202210231213.XA CN202210231213A CN114460525A CN 114460525 A CN114460525 A CN 114460525A CN 202210231213 A CN202210231213 A CN 202210231213A CN 114460525 A CN114460525 A CN 114460525A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
实验室电测量设备检测用夹具功能失效监控装置，属于监控装置领域，是针对夹具接线端部温度失控及压力失常的问题所提出，包括压力监控单元、中心控制单元、温度监控单元和4G模块单元，所述压力监控单元包括压力传感器单元和压力传感器信号采集专用芯片单元，所述中心控制单元包括串行数据接口、I2C数字接口和UART接口，所述温度监控单元包括红外温度传感器单元。实时化的故障监测及故障定位设计能够及时发现检测设备可能存在的问题，提升检测精度，提高了电测设备检测实验室检测的准确性，降低复检工作量。
The utility model relates to a fixture function failure monitoring device for the detection of laboratory electrical measuring equipment, which belongs to the field of monitoring devices. The pressure monitoring unit includes a pressure sensor unit and a dedicated chip unit for pressure sensor signal acquisition, the central control unit includes a serial data interface, an I 2 C digital interface and a UART interface, and the temperature monitoring unit includes an infrared temperature sensor unit. The real-time fault monitoring and fault location design can timely discover the possible problems of the testing equipment, improve the testing accuracy, improve the testing accuracy of the electrical testing equipment testing laboratory, and reduce the workload of re-testing.
Description
Technical Field
The invention relates to the field of monitoring devices, in particular to a clamp function failure monitoring device for detecting laboratory electrical measuring equipment.
Background
With the proposal of development strategy of intelligent power grids in China, the popularization and application of intelligent electric metering equipment are increased explosively, the detection of the metering equipment is gradually advanced to automation and flexibility with higher verification speed, higher verification quality and more perfect functions from the traditional manual operation, and the automation technology is fully utilized to perform assembly line verification on the intelligent electric energy meter, so that the intelligent electric energy meter autonomously completes all verification tasks without human intervention.
The electric energy meter calibrating device is mainly used for calibrating the electric energy meter, and the main functions of the electric energy meter calibrating device are controlled by a computer or a keyboard, and a program-controlled power supply provides voltage and current required by the work of a tested meter and a standard electric energy meter; the electric energy pulses of the detected meter and the standard meter are collected and sent to the error calculation unit, the error calculation unit calculates the error, the calculated error is displayed locally and sent to a computer through the control center for displaying and data processing, and the purpose of calibrating the electric energy meter is achieved.
The flexible detection technology is an automatic detection technology capable of being intelligently regulated and controlled. According to the characteristics of the detection object and the difference of the detection tasks, the detection mode is judged and adjusted, and the effects of detecting more products within a fixed period and shortening the product detection period are achieved. The characteristics of the system in the automatic verification system of the intelligent electric energy meter are embodied as follows: (1) the terminal wiring mode of a single-phase meter, an energy controller, a fusion terminal and three-phase intelligent electric energy meters with different specifications and types can be met, namely, the detection device can be self-adaptive to tested meters with different specifications; (2) the verification and detection are carried out according to corresponding verification rules and specifications, and the wiring success rate is improved, so that the productivity is improved.
The automatic wiring device is a key ring for realizing automatic verification, and in items such as voltage withstanding tests, multifunctional detection and the like, the electric energy meter terminal is required to be connected with a detection device, specified voltage, current or communication signals are transmitted, and whether parameters or functions of the electric energy meter terminal meet corresponding specifications is detected. The intelligent electric energy meter has numerous connecting terminals, each different detection object has a unique connection mode, the original manual connection and disconnection are time-consuming and labor-consuming, and the reliability is not high, the automatic wiring device adopted in the flexible automatic detection laboratory realizes the accurate positioning of the electric energy meter at the corresponding detection device and the successful butt joint with the detection device through the matching of the transmission line, the jacking platform, the stopping mechanism, the pneumatic pressing mechanism and other devices, wherein, in order to facilitate loading and unloading and self-adapt to the electric energy meters with different specifications, the detection equipment interface adopts a uniform clamp design, the clamp connection detection equipment end adopts a uniform design, the detection object connection clamp interface adopts a customized design, the signal transmission terminal directly connected with the electric energy meter terminal is fixed at the inner side of the clamp during detection, the signal transmission terminal comprises a sliding rod and a sleeve, and a spring is arranged in the signal transmission terminal, the length is scalable. Due to the design of the automatic wiring device and the integrated clamp, the wiring efficiency is greatly improved, and the flexibility of verification is enhanced.
The prior art has the following defects:
in the actual operation process, anchor clamps binding post passes through tip roof pressure contact with the ammeter terminal and realizes being connected and signal transmission, and contact failure's situation can appear at its tip, especially when examining and determine through the heavy current, can lead to the contact site to generate heat, and too high temperature can damage electric energy meter, anchor clamps, causes the conflagration even. In addition, the terminal part of the detection device is electrified for a long time, so that the oxidation speed of the metal terminal is accelerated, the terminal is corroded, the contact resistance is further increased, and higher current temperature rise is caused. On the other hand, in the long-term operation process, the intelligent electric energy meter frequently accesses the clamp wiring terminal, so that the problems of unstable connection and the like caused by deformation of the clamp mechanical crimping terminal or relaxation of spring clamping elasticity can be solved. The damage and the functional degradation of the key components directly influence the reliability of an error test result, and further influence the verification quality of the intelligent electric energy meter. At present, the meter position of a verification assembly line is generally overhauled by each provincial metering center under the national power grid company in a regular checking mode, the meter position fault cannot be found in time in the mode, the problem is manually checked, and the meter position detection method is insufficient in reliability and high in labor cost.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a clamp failure monitoring device for detecting laboratory electrical measuring equipment, which can solve the problems of temperature runaway and pressure abnormality of a terminal of a clamp.
The technical scheme adopted by the invention is as follows:
laboratory electricity measuring equipment detects with anchor clamps functional failure monitoring device, including pressure monitoring unit, central control unit, temperature monitoring unit and 4G modular unit, the pressure monitoring unit includes pressure sensor unit and pressure sensor signal acquisition special chip unit, central control unit includes serial data interface, I2The system comprises a digital interface C and a UART interface, wherein the temperature monitoring unit comprises an infrared temperature sensor unit;
the pressure sensor unit is connected with the input end of the pressure sensor signal acquisition special chip unit, and the pressure sensor signal acquisition special chip unitThe output end of the infrared temperature sensor unit is connected with a serial data interface of the central control unit, and the infrared temperature sensor unit is connected with the I of the central control unit2And the 4G module unit is connected with a UART interface of the central control unit.
Further, the pressure sensor unit is used for monitoring the pressure of the wiring terminal spring and outputting a signal to the pressure sensor signal acquisition special chip unit.
Furthermore, the pressure sensor signal acquisition special chip unit is used for transmitting the pressure measurement result to the central control unit in a digital quantity form through a serial data interface of the central control unit.
Further, the central control unit is used for counting, analyzing and processing the monitored temperature and pressure information, comparing the temperature and pressure information with a preset standard value, and sending a control signal to cut off a working power supply of a corresponding epitope in time and send fault information when an abnormal condition occurs.
Further, the infrared temperature sensor unit is used for monitoring the temperature of the terminal through the infrared temperature sensor and processing the temperature information through I2And C, transmitting the digital interface to a central control unit.
Further, the 4G module unit is used for sending fault information to a mobile phone of a worker according to an instruction of the central control unit.
The invention has the beneficial effects that:
1. aiming at the possible failure reasons of the clamp wiring terminal, a monitoring scheme corresponding to functional failure is added, and the functional reliability level of the clamp detection device is improved.
2. Real-time fault monitoring and fault location design can in time discover the problem that check out test set probably exists, avoid taking place to a certain extent because of the condition that anchor clamps functional failure leads to detecting the precision to reduce to ensure the detection precision that detects the electrical measurement equipment detection stage body, improved the accuracy that the electrical measurement equipment detection laboratory detected, reduce reinspection work load, further improved electrical measurement equipment detection laboratory automation level simultaneously, alleviateed the burden of manpower troubleshooting.
Drawings
FIG. 1 is a schematic block diagram of a fixture functional failure monitoring apparatus for laboratory electrical measurement equipment testing;
FIG. 2 is a functional failure monitoring device of a clamp for laboratory electrical measurement equipment detection;
FIG. 3 is a schematic diagram of the position of the infrared temperature measurement sensor of the clamp failure monitoring device for detecting laboratory electrical measurement equipment;
FIG. 4 is a schematic diagram of the position of the pressure sensor of the clamp failure monitor for laboratory electrical measurement equipment detection;
FIG. 5 is a circuit diagram of a signal processing dedicated chip of a pressure sensor of a clamp failure monitoring device for detecting laboratory electrical measurement equipment;
FIG. 6 is a circuit diagram of a controller for a pressure sensor of a fixture failure monitor for laboratory electrical measurement equipment testing;
Detailed Description
As shown in figures 1 and 2, the clamp function failure monitoring device for detecting the laboratory electrical measuring equipment comprises a pressure monitoring unit, a central control unit, a temperature monitoring unit and a 4G module unit, wherein the pressure monitoring unit comprises a pressure sensor ARIZON-2179 unit and a pressure sensor signal acquisition special chip unit, and the central control unit comprises a serial data interface, an I/O interface and a special chip unit for pressure sensor signal acquisition2The system comprises a C digital interface and a UART interface, wherein the temperature monitoring unit comprises an infrared temperature sensor MLX90614 unit.
The ARIZON-2179 unit of the pressure sensor is connected with the input end of the chip unit special for collecting the pressure sensor signal, the output end of the chip unit special for collecting the pressure sensor signal is connected with the serial data interface of the central control unit, and the MLX90614 unit of the infrared temperature sensor is connected with the I of the central control unit2And the 4G module unit is connected with a UART interface of the central control unit.
The pressure sensor ARIZON-2179 unit is used for monitoring the pressure of a terminal spring and outputting a signal to the pressure sensor signal acquisition special chip unit;
the pressure sensor signal acquisition special chip unit is used for transmitting a pressure measurement result to the central control unit in a digital quantity form through a serial data interface of the central control unit;
and the central control unit is used for counting, analyzing and processing the monitored temperature and pressure information, comparing the temperature and pressure information with a preset standard value, sending a control signal when an abnormal condition occurs, cutting off a working power supply of a corresponding epitope in time and sending fault information.
The infrared temperature sensor MLX90614 unit is used for monitoring the temperature of the terminal through the infrared temperature sensor and processing temperature information through I2C, transmitting the digital interface to a central control unit;
and the 4G module unit sends fault information to the mobile phone of the worker according to the instruction of the central control unit.
The implementation process of this embodiment is as follows:
this embodiment, mainly follow anchor clamps signal wiring terminal two main aspects that lose efficacy and carry out real time monitoring, divide into temperature monitoring unit and pressure monitoring unit, detect the temperature and the pressure that the wiring terminal received respectively. When the electric energy meter detection item is ready to be wired at present, the power supply is switched on to start monitoring.
As shown in fig. 1, fig. 2, and fig. 3, in which the temperature monitoring unit senses the temperature of the terminal of the connection signal through the temperature sensor unit, the temperature monitoring unit may be described as sensing the temperature of the terminal of the connection signal through the infrared temperature sensor in the embodiment, since the infrared temperature sensor senses the temperature within the field range of view, the infrared temperature sensor may convert the temperature information within the sensing range into digital signal information through I2The C digital interface is transmitted to the central control unit, the central control unit analyzes and processes the obtained temperature data, once the temperature of the terminal in a certain temperature monitoring area is higher than a preset temperature value, the central control unit sends a signal to cut off a power supply corresponding to the epitope of the detection device, the central control unit calculates the current value in the circuit according to the load so as to calculate the normal temperature value of the probe, and if the temperature value exceeds the preset temperature value, the central control unit calculates the current value in the circuit to obtain the normal temperature value of the probeIf the temperature is within the temperature monitoring region, the probe contact resistance is determined to be increased, and the phenomenon is determined to be a failure phenomenon. The automatic power-off mode adopts a traditional relay + contactor mode. And meanwhile, the position of the fault station is sent to a mobile phone of a worker through the 4G module unit to be informed.
The temperature sensor is installed at different positions according to different models and using methods, and each terminal is required to be monitored. Taking an infrared temperature sensor as an example, the infrared temperature sensor is installed right above a wiring signal end through a necessary supporting structure, and the number and the specification of the sensors are selected according to the distance from a sensor probe to a terminal and the diameter range of the distribution of the terminal to be measured, so that the measurement range is ensured to cover all the terminals.
Because the temperature of the wiring signal end of the clamp is measured in the design, the wiring signal end of the clamp is more in object and the space near the wiring signal end of the clamp is limited, if a contact type temperature sensor is used, the sensor needs to be connected to each terminal, and the problems of difficult wiring of the sensor and insufficient wiring space may exist.
If a PT100 platinum resistor is selected, it is considered that a temperature sensor is added to each probe, which has the advantage of accurate positioning after a problem occurs, and has the disadvantage that the contact type temperature measurement needs to be processed in many other aspects to ensure the safety of the system operation.
The temperature sensors should be all temperature sensors capable of accomplishing the objective monitoring task, including infrared temperature sensors. The infrared temperature sensor is non-contact in temperature measurement, one sensor can cover a plurality of wiring terminals, and the non-contact characteristic enables the installation position to have more flexibility, does not have the insufficient problem of space, is the best choice. So the infrared sensor is taken as an example before.
As shown in fig. 1, fig. 2, and fig. 4, wherein the pressure monitoring unit performs real-time monitoring through the pressure sensing device fixed at the bottom of the spring inside the wiring signal pin, and transmits the pressure value information to the central control unit through the serial data interface of the central control unit, if the pressure value applied to a certain terminal is obviously different from the pressure of other terminals working simultaneously or the pressure information cannot be detected for a long time, the central control unit sends out a control signal to immediately stop the detection experiment of the station, wherein the implementation manner of the central control unit is as follows: through data statistics on the continuous pressure signal values, preset values are set for a program in the central control unit, and when the preset values are not reached, a fault is judged to occur. And then fault information is sent to the mobile phone of the worker through the 4G module unit.
Meanwhile, the difference between the pressure value of the wiring end when the standard fixture without faults is detected and the detection pressure value after the standard fixture works for a certain time can be periodically compared, if the difference exceeds a certain error range, a fault signal that the part is aged and needs to be replaced is sent to a mobile phone of a worker through the 4G module unit, and the influence on the verification accuracy is avoided.
In this example, the pressure sensor model: ARIZON-2179, infrared temperature sensor model: MLX90614, central control unit model: STM32F417VGT6 or STM32F417ZGT6 may be used.
Claims (6)
1. Laboratory electricity measuring equipment detects with anchor clamps functional failure monitoring device, its characterized in that, including pressure monitoring unit, central control unit, temperature monitoring unit and 4G modular unit, pressure monitoring unit includes pressure sensor unit and pressure sensor signal acquisition special chip unit, central control unit includes serial data interface, I2The system comprises a C digital interface and a UART interface, wherein the temperature monitoring unit comprises an infrared temperature sensor unit;
the pressure sensor unit is connected with the input end of the pressure sensor signal acquisition special chip unit, the output end of the pressure sensor signal acquisition special chip unit is connected with the serial data interface of the central control unit, and the infrared temperature sensor unit is connected with the I of the central control unit2And the 4G module unit is connected with a UART interface of the central control unit.
2. The device for monitoring functional failure of clamp for detection of laboratory electrical measuring equipment according to claim 1, wherein the pressure sensor unit is used for monitoring terminal spring pressure and outputting signal to the pressure sensor signal acquisition dedicated chip unit.
3. The device for monitoring the functional failure of the clamp for detecting the laboratory electrical measuring equipment as claimed in claim 1, wherein the pressure sensor signal acquisition special chip unit is used for transmitting the result of measuring the pressure to the central control unit in a digital quantity form through a serial data interface of the central control unit.
4. The device for monitoring the functional failure of the clamp for the detection of the laboratory electrical measuring equipment according to claim 1, wherein the central control unit is used for counting, analyzing and processing the monitored temperature and pressure information, comparing the information with a preset standard value, and sending a control signal to cut off a working power supply of a corresponding epitope in time and send fault information when an abnormal condition occurs.
5. The apparatus for monitoring functional failure of clamp for detection of laboratory electrical measuring equipment according to claim 1, wherein the infrared temperature sensor unit is used for monitoring terminal temperature through an infrared temperature sensor and processing temperature information through I2And C, transmitting the digital interface to a central control unit.
6. The device for monitoring the functional failure of the clamp for detecting the laboratory electrical measuring equipment as claimed in claim 1, wherein the 4G module unit is used for sending fault information to a mobile phone of a worker according to an instruction of a central control unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210231213.XA CN114460525A (en) | 2022-03-10 | 2022-03-10 | Clamp function failure monitoring device for detecting laboratory electrical measuring equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210231213.XA CN114460525A (en) | 2022-03-10 | 2022-03-10 | Clamp function failure monitoring device for detecting laboratory electrical measuring equipment |
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| CN114460525A true CN114460525A (en) | 2022-05-10 |
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| CN202210231213.XA Pending CN114460525A (en) | 2022-03-10 | 2022-03-10 | Clamp function failure monitoring device for detecting laboratory electrical measuring equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105629164A (en) * | 2016-02-16 | 2016-06-01 | 云南电网有限责任公司昆明供电局 | Device and method for monitoring state of energy storage spring of circuit breaker |
| CN106646024A (en) * | 2016-11-03 | 2017-05-10 | 谢梦 | Rapid line tester |
| CN209248008U (en) * | 2018-11-29 | 2019-08-13 | 云南电网有限责任公司楚雄供电局 | Device for energy meter standard terminal compression joint mechanism with pressure monitoring function |
| CN110187301A (en) * | 2019-06-25 | 2019-08-30 | 广东电网有限责任公司 | A kind of temp measuring system of electric energy meter calibrating apparatus and its meter adapting-seat binding post |
| CN111044896A (en) * | 2019-12-23 | 2020-04-21 | 云南恒协科技有限公司 | Strut type circuit breaker on-line monitoring system |
| CN217112682U (en) * | 2022-03-10 | 2022-08-02 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Clamp function failure monitoring device for detecting laboratory electrical measuring equipment |
-
2022
- 2022-03-10 CN CN202210231213.XA patent/CN114460525A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629164A (en) * | 2016-02-16 | 2016-06-01 | 云南电网有限责任公司昆明供电局 | Device and method for monitoring state of energy storage spring of circuit breaker |
| CN106646024A (en) * | 2016-11-03 | 2017-05-10 | 谢梦 | Rapid line tester |
| CN209248008U (en) * | 2018-11-29 | 2019-08-13 | 云南电网有限责任公司楚雄供电局 | Device for energy meter standard terminal compression joint mechanism with pressure monitoring function |
| CN110187301A (en) * | 2019-06-25 | 2019-08-30 | 广东电网有限责任公司 | A kind of temp measuring system of electric energy meter calibrating apparatus and its meter adapting-seat binding post |
| CN111044896A (en) * | 2019-12-23 | 2020-04-21 | 云南恒协科技有限公司 | Strut type circuit breaker on-line monitoring system |
| CN217112682U (en) * | 2022-03-10 | 2022-08-02 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Clamp function failure monitoring device for detecting laboratory electrical measuring equipment |
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Application publication date: 20220510 |