Automatic inspection system and method suitable for temperature measurement of terminal base of intelligent electric meter

Abstract

The invention provides an automatic inspection system and method suitable for temperature measurement of a terminal seat of an intelligent electric meter, the system comprises an upper computer, a communication unit, a temperature control unit and a heating unit, and the heating unit is connected with a wiring terminal of the intelligent electric meter; the upper computer is used for controlling the temperature control unit and the communication unit; the temperature control unit is controlled according to a preset temperature detection point, so that the temperature of the heating unit connected with the detected terminal of the intelligent electric meter is increased; the communication unit is used for collecting the heating temperature of the temperature control unit, reading the temperature value of the tested terminal of the intelligent electric meter, comparing the heating temperature and the temperature value to obtain the temperature deviation, and outputting the test data as a test report. The method has the characteristics of low cost, high safety, high efficiency and the like, and can be widely applied to automatic verification and production work of the intelligent electric energy meter with a terminal seat temperature measurement function.

Description

Technical Field

[0001] The invention relates to the field of electronic information and electric power inspection design, and in particular to an automatic inspection system for temperature measurement of a terminal seat of a new standard Internet of Things meter of a State Grid. Background Art

[0002] With the rapid development of smart Internet of Things technology, people's demand for smart grid security is also increasing.

[0003] The existing new IoT standard has added the function of terminal temperature measurement, but in the early stage, there was a lack of inspection equipment for terminal seat temperature measurement. There was no simple and automated device to inspect the temperature measurement accuracy, and it was impossible to accurately test whether the meter met the standard requirements. Summary of the invention

[0004] The purpose of the present invention is to address the problem of temperature detection of electric energy meter terminal seats and propose an automated inspection system and method suitable for temperature measurement of smart meter terminal seats. By configuring multiple temperature detection points and thresholds on the host computer, the heating rod is automatically controlled to heat up and the heating rod temperature and the smart meter terminal temperature are collected respectively. The two are compared and subtracted to accurately evaluate the temperature measurement performance of the smart meter terminal seat; it also supports single-phase and three-phase meter detection, and can selectively test different wiring terminals to achieve automation of the detection process without manual intervention.

[0005] The technical solution of the present invention is:

[0006] The present invention provides an automated inspection system suitable for temperature measurement of a terminal seat of a smart meter, comprising a host computer, a communication unit, a temperature control unit and a heating unit, wherein the heating unit is connected to the connection terminal of the smart meter;

[0007] The host computer is used to control the temperature control unit and the communication unit;

[0008] Controlling the temperature control unit according to a preset temperature detection point so that the heating unit connected to the measured terminal of the smart meter is heated;

[0009] The heating temperature of the temperature control unit is collected through the communication unit, and the temperature value of the tested terminal of the smart meter is read, the two are compared to obtain the temperature deviation, and the test data is output as a test report.

[0010] Furthermore, the host computer is also used to configure different temperature detection points, detection point thresholds, the number of temperature readings and comparisons when the temperature runs to the preset detection point, the time interval for multiple temperature readings at the same detection point, the temperature rise time corresponding to different temperatures, and the preset parameters of the temperature alarm upper limit.

[0011] Furthermore, the system is compatible with the terminal seat temperature detection of single-phase and three-phase Internet of Things meters, and can detect two single-phase meters or one three-phase meter at the same time; the terminal to be tested is selected according to the test requirements.

[0012] Furthermore, during the test, the host computer displays the communication status with the temperature control unit and the smart meter in real time, and displays the heating temperature and the temperature value of the tested terminal of the smart meter in real time.

[0013] Furthermore, the communication unit includes a 485 module and a Bluetooth module, the 485 module is used to collect the temperature of the heating rod connected to the temperature control unit, and the Bluetooth module is used to read the temperature value of the measured terminal of the smart meter.

[0014] Furthermore, the host computer powers on the isolated power supply through the 485 module, and the smart meter under test is powered on; after waiting for the smart meter under test to be powered on stably, the host computer communicates with the meter under test through the Bluetooth module, reads the original temperature in the meter and returns it to the host computer.

[0015] Furthermore, the temperature control unit adopts a temperature controller, and the heating unit adopts a heating rod.

[0016] A method for testing the system comprises the following steps:

[0017] Obtain preset parameters of multiple temperature detection points and corresponding thresholds;

[0018] According to the temperature detection point parameters, the upper computer controls the heating unit to increase the temperature according to the set temperature curve and stabilize it at the target temperature;

[0019] When the temperature of the heating unit reaches the target temperature of the preset temperature detection point and runs stably for the preset time, the host computer collects the current temperature of the heating unit from the temperature control unit through the 485 module, reads the current temperature of the measured terminal from the smart meter through the Bluetooth module, and compares and subtracts the two to obtain the temperature deviation value;

[0020] Determine whether the temperature deviation value exceeds a preset threshold, and if so, determine that the temperature detection point is unqualified;

[0021] Repeat the above temperature collection and comparison steps for each preset temperature detection point until the temperature deviation determination of all detection points is completed.

[0022] Furthermore, the temperature detection point parameters include target temperature, temperature rise time, stabilization time and collection interval time, and the threshold is an upper limit of temperature deviation.

[0023] Beneficial effects of the present invention:

[0024] The method of the present invention presets multiple temperature detection point parameters and thresholds, and uses a host computer to control the temperature controller to increase the temperature and stabilize according to the set curve; when the target temperature is reached and stabilized, the temperature of the heating rod and the terminal are collected and compared to determine whether the deviation exceeds the threshold. Repeat this process to complete the temperature deviation determination of all detection points, and finally output the inspection report and temperature curve diagram.

[0025] The present invention also supports automatic testing of functions such as terminal seat temperature alarm and overheat protection, and automatically triggers corresponding actions and records data by configuring different alarm points and conditions.

[0026] The system of the present invention realizes the comprehensive automation of the temperature detection of the electric energy meter terminal seat, improves the detection efficiency and accuracy, and provides a reliable guarantee for product quality control.

[0027] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0029] Figure 1 A block diagram of an automated inspection system for temperature measurement of a terminal block of a smart meter according to an embodiment of the present invention is shown.

[0030] Figure 2 A flow chart of an automated inspection method for temperature measurement of a terminal block of a smart meter according to an embodiment of the present invention is shown.

[0031] Figure 3 A schematic diagram of the host computer development architecture of an automated temperature measurement system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0033] Example 1

[0034] Figure 1 A block diagram of an automated inspection system for temperature measurement of a terminal block of a smart meter according to an embodiment of the present invention is shown.

[0035] like Figure 1As shown, the present invention provides an automated inspection system suitable for temperature measurement of a terminal seat of a smart meter, comprising a host computer, a communication unit, a temperature control unit and a heating unit, wherein the heating unit is connected to the connection terminal of the smart meter;

[0036] The host computer is used to control the temperature control unit and the communication unit;

[0037] Controlling the temperature control unit according to a preset temperature detection point so that the heating unit connected to the measured terminal of the smart meter is heated;

[0038] The heating temperature of the temperature control unit is collected through the communication unit, and the temperature value of the tested terminal of the smart meter is read, the two are compared to obtain the temperature deviation, and the test data is output as a test report.

[0039] In one example, the host computer is also used to configure different temperature detection points, detection point thresholds, the number of temperature readings and comparisons when the temperature runs to the preset detection point, the time interval for multiple temperature readings at the same detection point, the temperature rise time corresponding to different temperatures, and preset parameters for the temperature alarm upper limit.

[0040] In one example, the system also supports terminal seat temperature-related event recording, including terminal seat overheating alarm events, terminal seat overheating shutdown time, and terminal seat temperature imbalance event recording. During the inspection process, the corresponding temperature points are designed in the pre-parameter configuration. When an event is triggered, the event record of the measured meter will be automatically synchronized to the host computer for inspection and detection.

[0041] In this embodiment, the system is mainly used for single-phase and three-phase meters in the Internet of Things. It can realize the automatic verification of the temperature measurement related functions of the single-phase meter terminal block at a relatively low cost. As long as there is an automated host computer, two communication units, a temperature control unit and a heating unit, the terminal automatic heating and data automatic verification of the single-phase and three-phase meters can be efficiently performed.

[0042] The system is compatible with the terminal seat temperature detection of single-phase and three-phase IoT meters, and can detect two single-phase meters or one three-phase meter at the same time; the terminal to be tested is selected according to the test requirements.

[0043] During the test, the host computer displays the communication status with the temperature control unit and the smart meter in real time, and displays the heating temperature and the temperature value of the tested terminal of the smart meter in real time.

[0044] In one example, the communication unit includes a 485 module and a Bluetooth module, the 485 module is used to collect the temperature of the heating rod connected to the temperature control unit, and the Bluetooth module is used to read the temperature value of the measured terminal of the smart meter;

[0045] The host computer powers on the isolated power supply through the 485 module, and the smart meter under test is powered on; after the smart meter under test is powered on and stabilized, it communicates with the meter under test through the Bluetooth module, reads the original temperature in the meter and returns it to the host computer.

[0046] Example 2

[0047] Figure 2 A flow chart of an automated inspection method for temperature measurement of a terminal block of a smart meter according to an embodiment of the present invention is shown.

[0048] like Figure 2 As shown, the present invention provides a testing method, comprising the following steps:

[0049] Obtaining a plurality of preset temperature detection point parameters and corresponding thresholds; the temperature detection point parameters include target temperature, temperature rise time, stabilization time and collection interval time, and the threshold is the upper limit of temperature deviation;

[0050] According to the temperature detection point parameters, the upper computer controls the heating unit to increase the temperature according to the set temperature curve and stabilize it at the target temperature;

[0051] When the temperature of the heating unit reaches the target temperature of the preset temperature detection point and runs stably for the preset time, the host computer collects the current temperature of the heating unit from the temperature control unit through the 485 module, reads the current temperature of the measured terminal from the smart meter through the Bluetooth module, and compares and subtracts the two to obtain the temperature deviation value;

[0052] Determine whether the temperature deviation value exceeds a preset threshold, and if so, determine that the temperature detection point is unqualified;

[0053] Repeat the above temperature collection and comparison steps for each preset temperature detection point until the temperature deviation determination of all detection points is completed.

[0054] Specifically:

[0055] The first step is to enter the meter parameters on the host computer operation interface, including the meter number, communication baud rate, and calibration temperature point. After the host computer operation is successful, the meter hanging process will be performed.

[0056] The host computer powers on the isolated power supply through 485, so that the energy meter under test is powered on. After the host computer waits for a period of time, the energy meter under test is powered on and stable; Bluetooth communicates with the meter under test, reads the original temperature in the meter and returns the data to the host computer. The above steps can ensure that the energy meter under test and the two communication units are normal.

[0057] After the communication unit successfully communicates, the host computer will automatically heat up the temperature control unit. The temperature control unit will automatically rise to the first inspection point of 115 degrees within a period of time. Then, after stabilizing for a period of time, the host computer will send a temperature reading request to the measured electric energy meter via Bluetooth within the last minute. The measured meter returns the terminal temperature measurement data to the host computer via Bluetooth for display. This process will continuously read the terminal temperature multiple times, and finally take the maximum value as the final temperature measurement deviation. This data can clearly reflect whether the measurement accuracy of the measured electric energy meter meets the national grid standard (±5 degrees).

[0058] After the test of the first inspection point is completed, the host computer allows the heating unit to automatically rise to the second inspection point of 135 degrees within a period of time, and then stabilize for a period of time. In the last minute, the host computer sends a temperature reading request to the electric energy meter under test via Bluetooth. The meter under test returns the terminal temperature measurement data to the host computer via Bluetooth for display. This process will continuously read the terminal temperature for multiple times, and finally take the maximum value as the final temperature measurement deviation. This data can clearly reflect whether the measurement accuracy of the electric energy meter under test meets the national grid standard (±5 degrees).

[0059] After the two test points are calibrated, the host computer automatically powers off the power supply module, and the temperature control unit automatically performs a cooling operation, reducing the temperature to below 40 degrees within a period of time. At this time, the electric energy meter can be replaced and calibrated.

[0060] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An automated inspection system for temperature measurement of smart meter terminal blocks, characterized in that: It includes a host computer, a communication unit, a temperature control unit and a heating unit, wherein the heating unit is connected to the connection terminal of the smart meter; The host computer is used to control the temperature control unit and the communication unit; Controlling the temperature control unit according to a preset temperature detection point so that the heating unit connected to the measured terminal of the smart meter is heated; The heating temperature of the temperature control unit is collected through the communication unit, and the temperature value of the tested terminal of the smart meter is read, the two are compared to obtain the temperature deviation, and the test data is output as a test report.

2. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 1 is characterized in that: The host computer is also used to configure different temperature detection points, detection point thresholds, the number of temperature readings and comparisons when the temperature runs to the preset detection point, the time interval for multiple temperature readings at the same detection point, the temperature rise time corresponding to different temperatures, and the preset parameters of the temperature alarm upper limit.

3. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 1 is characterized in that: The system is compatible with the terminal seat temperature detection of single-phase and three-phase IoT meters, and can detect two single-phase meters or one three-phase meter at the same time; the terminal to be tested is selected according to the test requirements.

4. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 1 is characterized in that: During the test, the host computer displays the communication status with the temperature control unit and the smart meter in real time, and displays the heating temperature and the temperature value of the tested terminal of the smart meter in real time.

5. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 1 is characterized in that: The communication unit includes a 485 module and a Bluetooth module. The 485 module is used to collect the temperature of the heating rod connected to the temperature control unit, and the Bluetooth module is used to read the temperature value of the measured terminal of the smart meter.

6. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 5, characterized in that: The host computer powers on the isolated power supply through the 485 module, and the smart meter under test is powered on; After the smart meter under test is powered on and stabilized, the Bluetooth module is used to communicate with the meter under test, read the original temperature inside the meter and return it to the host computer.

7. The automatic inspection system for temperature measurement of the terminal seat of a smart meter according to claim 1, characterized in that: The temperature control unit adopts a temperature controller, and the heating unit adopts a heating rod.

8. A method for testing a system according to any one of claims 1 to 7, characterized in that The following steps are involved: Obtain preset parameters of multiple temperature detection points and corresponding thresholds; According to the temperature detection point parameters, the upper computer controls the heating unit to increase the temperature according to the set temperature curve and stabilize it at the target temperature; When the temperature of the heating unit reaches the target temperature of the preset temperature detection point and runs stably for the preset time, the host computer collects the current temperature of the heating unit from the temperature control unit through the 485 module, reads the current temperature of the measured terminal from the smart meter through the Bluetooth module, and compares and subtracts the two to obtain the temperature deviation value; Determine whether the temperature deviation value exceeds a preset threshold, and if so, determine that the temperature detection point is unqualified; Repeat the above temperature collection and comparison steps for each preset temperature detection point until the temperature deviation determination of all detection points is completed.

9. The automated inspection method for temperature measurement of a terminal block of a smart meter according to claim 8, characterized in that: The temperature detection point parameters include target temperature, temperature rise time, stabilization time and collection interval time, and the threshold is the upper limit of temperature deviation.

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