CN112068067A - On-load error detection system of epitope isolation transformer of assembly line metrological verification device - Google Patents
On-load error detection system of epitope isolation transformer of assembly line metrological verification device Download PDFInfo
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Abstract
The invention discloses an epitope isolation transformer loading error detection system of an assembly line metrological verification device, which comprises: the first single-phase standard meter is connected with a pulse output interface and a voltage and current interface of the assembly line metrological verification device, the second single-phase standard meter is installed on an epitope of the assembly line metrological verification device, the wireless data transmission module is in communication connection with the first single-phase standard meter and the second single-phase standard meter, and the data analysis module is in communication connection with the wireless data transmission module; when the error detection of the epitope isolation transformer after the loading is carried out, the assembly line metering and calibrating device raises voltage and current and sends out pulse signals, the first single-phase standard meter and the second single-phase standard meter respectively detect pulse data of the assembly line metering and calibrating device and the epitope isolation transformer after the loading, the wireless data transmission module receives the detected pulse data and sends the pulse data to the data analysis module, and the data analysis module obtains an error detection result of the epitope isolation transformer after the loading according to the pulse data.
Description
Technical Field
The invention relates to the technical field of standard meter detection, in particular to a system for detecting an on-load error of an epitope isolation transformer of an assembly line metrological verification device.
Background
At present, each metrological verification mechanism is provided with an automatic verification assembly line metrological verification device for use. According to the verification system, the verification period is 1 year, if a certain epitope error occurs in the two verification periods, all the intelligent electric energy meters detected in the verification period are traced, and the installed intelligent electric energy meters are dismantled for re-inspection. Due to the huge daily meter checking amount of the production line and the extremely fast meter checking process, once the problem meter position is not found in time, huge manpower, financial resources and material resources are lost.
According to the original detection method, only standard electric energy meters or no-load spot check epitopes are detected, and the accuracy of each epitope of the automatic detection system of the intelligent electric energy meter cannot be completely ensured. The problem of error accuracy of the verification system is not only influenced by external factors such as working environment and vibration, but also more influenced by factors such as the load capacity, the short-circuit relay state and the contact resistance of a line pressing mechanism of the isolation transformer with different epitopes. However, the current method for detecting the epitopes one by one in idle running by using a common standard electric energy meter by a detection department cannot accurately detect the real conditions of the epitopes after loading.
In view of the above, a technical scheme is needed to accurately detect the error of the epitope isolation transformer after loading and determine whether the epitope works normally, which can overcome the above disadvantages.
Disclosure of Invention
The invention discloses an epitope isolation transformer loading error detection system of an assembly line metering and calibrating device, which can be used for remotely detecting pulse errors and daily timing errors, analyzing line harmonic waves and comparing electric quantity errors on line by combining a single-phase standard meter and a wireless data transmission module, thereby more accurately measuring the real situation of an electric energy meter in use and monitoring the long-term running stability of the electric energy meter.
Specifically, the system comprises: the system comprises a first single-phase standard meter, a second single-phase standard meter, a production line metrological verification device, a wireless data transmission module and a data analysis module; wherein the content of the first and second substances,
the first single-phase standard meter is connected with a pulse output interface and a voltage and current interface of the assembly line metrological verification device, the second single-phase standard meter is installed on an epitope of the assembly line metrological verification device, the wireless data transmission module is in communication connection with the first single-phase standard meter and the second single-phase standard meter, and the data analysis module is in communication connection with the wireless data transmission module;
when the error detection of the epitope isolation transformer after the loading is carried out, the assembly line metering and calibrating device raises voltage and current and sends out pulse signals, the first single-phase standard meter and the second single-phase standard meter respectively detect pulse data of the assembly line metering and calibrating device and the epitope isolation transformer after the loading, the wireless data transmission module receives the detected pulse data and sends the pulse data to the data analysis module, and the data analysis module obtains an error detection result of the epitope isolation transformer after the loading according to the pulse data.
Furthermore, the voltage measuring range of the first single-phase standard meter and the second single-phase standard meter is 0-400V, the current measuring range is 0.1A-100A, and the accuracy is 0.02 grade.
Furthermore, the assembly line metrological verification device comprises a standard meter, an epitope isolation transformer and an epitope; the standard meter is connected with the first single-phase standard meter and the epitope isolation transformer, the detection accuracy of the standard meter is 0.1 level, the epitope isolation transformer is correspondingly provided with a plurality of epitopes, the accuracy of the epitope isolation transformer is 0.05 level, and the epitopes are used for installing a second single-phase standard meter.
Furthermore, the first single-phase standard meter is connected to the rear end of the standard meter in a current series connection and voltage parallel connection mode, and a pulse signal of the standard meter is directly connected into the first single-phase standard meter;
the pulse signal of the standard meter is also accessed into a second single-phase standard meter through an epitope isolation transformer and an epitope.
Further, the wireless data transmission module is an RS485 communication module, a Bluetooth communication module, a 3G module, a 4G module, a 5G module or a combination of the above modules.
Further, the data analysis module is a computer.
Further, the wireless data transmission module performs data transmission with the first single-phase standard meter and the second single-phase standard meter through RS485 communication or Bluetooth communication, and accesses a local wireless network to perform data transmission with a computer.
Further, when the system is used for error detection after the epitope isolation transformer is loaded, the method further comprises the following steps:
the method comprises the steps that a test voltage and a test current are raised by an assembly line metrological verification device, a power factor is set, a first single-phase standard meter and a second single-phase standard meter start to work, a wireless data transmission module receives pulse data detected by the two single-phase standard meters and sends the pulse data to a data analysis module, and after power is stabilized, an error detection result after an epitope isolation transformer is loaded is obtained by the data analysis module according to the pulse data; wherein the error detection result is obtained according to the following formula:
R＝(R1+R2+…+Rn) The method comprises the following steps of/n, wherein R is an error detection result of an epitope isolation transformer after loading; r1、R2、…、RnN error detection results measured according to the two single-phase standard tables;
adjusting the epitope mounted on the second single-phase standard meter, sequentially carrying out error detection on each epitope isolation transformer after loading, and respectively obtaining an error detection result of each epitope isolation transformer after loading;
and if the absolute value R is smaller than the error threshold value, judging that the error of the epitope isolation transformer after loading is qualified, and if the absolute value R is larger than or equal to the error threshold value, judging that the error of the epitope isolation transformer after loading is unqualified.
Further, the test voltage is 220V, and the test current adopts 5A, 20A and 60A.
Further, when the system is used for error detection after the epitope isolation transformer is loaded, the method further comprises the following steps:
and respectively adopting a test voltage 220V and a test current 5A, a test voltage 220V and a test current 20A, a test voltage 220V and a test current 60A according to preset test time to carry out error detection after the current epitope isolation transformer is loaded, so as to obtain an error detection result.
The invention provides an epitope isolation transformer loading error detection system of an assembly line metrological verification device, which consists of a single-phase standard meter, the assembly line metrological verification device, a wireless data transmission module and a data analysis module, wherein one single-phase standard meter is connected in series at the rear end of the device standard meter, the other single-phase standard meter is arranged at a tested meter position of the device, and pulse output interfaces of the device standard meter are respectively connected into the two single-phase standard meters; when error detection is carried out, the device raises voltage and current, errors of the standard meters of the two single-phase standard meter detection devices are read through the wireless data transmission module, and error difference values of different current points of the two different single-phase standard meters are calculated through the data analysis module, so that the loading error of the epitope isolation transformer is obtained; through the combination of the single-phase standard meter and the wireless data transmission module and the data analysis system, the error detection and analysis of different epitope isolation transformers during on-load operation can be realized, so that the on-load capacity of the epitope isolation transformer can be accurately measured, and the equipment abnormity caused by insufficient on-load capacity or faults of the epitope isolation transformer can be timely found.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an epitope isolation transformer loading error detection system of an assembly line metrological verification apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an assembly line metrological verification apparatus according to an embodiment of the present invention.
Detailed Description
The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, there is provided an epitope isolation transformer loading error detection system for an assembly line metrological verification apparatus, the system including: one single-phase standard meter is connected in series with the rear end of the device standard meter, the other single-phase standard meter is arranged on a tested meter position of the device, and pulse output interfaces of the device standard meter are respectively connected into the two single-phase standard meters; when error detection is carried out, the device raises voltage and current, errors of the standard tables of the two single-phase standard table detection devices are read through the wireless data transmission module, error difference values of different current points of the two different single-phase standard tables are calculated through the data analysis system, the average value is the loading error of an isolation transformer with a certain epitope, and therefore whether the isolation transformer with the epitope is qualified after loading is judged, and the working state of each table of the automatic verification assembly line metrological verification device is mastered in real time.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the invention.
Fig. 1 is a schematic structural diagram of an epitope isolation transformer loading error detection system of an assembly line metrological verification apparatus according to an embodiment of the present invention. As shown in fig. 1, the system includes: the system comprises a first single-phase standard table 1, a second single-phase standard table 2, an assembly line metrological verification device 3, a wireless data transmission module 4 and a data analysis module 5; wherein the content of the first and second substances,
the first single-phase standard meter 1 is connected with a pulse output interface and a voltage and current interface of the assembly line metrological verification device 3, the second single-phase standard meter 2 is installed on an epitope of the assembly line metrological verification device 3, the wireless data transmission module 4 is in communication connection with the first single-phase standard meter 1 and the second single-phase standard meter 2, and the data analysis module 5 is in communication connection with the wireless data transmission module 4;
when error detection is carried out after the epitope isolation transformer is loaded, the assembly line metering and calibrating device 3 raises voltage and current and sends out pulse signals, the first single-phase standard table 1 and the second single-phase standard table 2 respectively detect pulse data after the assembly line metering and calibrating device 3 and the epitope isolation transformer are loaded, the wireless data transmission module 4 receives the detected pulse data and sends the pulse data to the data analysis module 5, and the data analysis module 5 obtains an error detection result after the epitope isolation transformer is loaded according to the pulse data.
Specifically, when the system is used for error detection after the epitope isolation transformer is loaded, the detailed process is as follows:
step S1, raising the test voltage and the test current by the assembly line metrological verification device 3, and setting a power factor; the first single-phase standard table 1 and the second single-phase standard table 2 start to work; the test voltage is 220V, and the test current adopts 5A, 20A and 60A.
In the testing process, according to a preset testing time (for example, the time of each testing point is 5 minutes, and the total time for detecting 3 testing points 5A, 20A, and 60A is 15 minutes), error detection after the current epitope isolation transformer is loaded can be performed by respectively adopting a testing voltage 220V and a testing current 5A, a testing voltage 220V and a testing current 20A, and a testing voltage 220V and a testing current 60A.
Step S2, the wireless data transmission module 4 receives the pulse data detected by the two single-phase standard meters and sends the pulse data to the data analysis module 5, and after the power is stable, the data analysis module 5 obtains the error detection result of the epitope isolation transformer after loading according to the pulse data.
Wherein the error detection result is obtained according to the following formula:
R＝(R1+R2+…+Rn) The method comprises the following steps of/n, wherein R is an error detection result of an epitope isolation transformer after loading; r1、R2、…、RnThe test result is n error test results measured according to two single-phase standard tables.
Step S3, adjusting the epitopes installed in the second single-phase standard table 2, repeating the step S1 and the step S2, sequentially carrying out error detection on each epitope isolation transformer after loading, and respectively obtaining the error detection result of each epitope isolation transformer after loading;
and if the absolute value R is smaller than the error threshold value, judging that the error of the epitope isolation transformer after loading is qualified, and if the absolute value R is larger than or equal to the error threshold value, judging that the error of the epitope isolation transformer after loading is unqualified.
Each device in the system is described in detail below:
the voltage measuring range of the first single-phase standard table 1 and the second single-phase standard table 2 is 0-400V, the current measuring range is 0.1A-100A, and the accuracy is 0.02 grade. The single-phase standard meter has the RS485 communication and Bluetooth communication functions, the measurement function and the data micro-processing function. The communication function is used for uploading the data of the single-phase standard table to the wireless data transmission module; the measuring function is used for measuring the pulse error of the device; and the data micro-processing function is used for calculating and processing the pulse error.
Fig. 2 is a schematic structural diagram of an assembly line metrological verification apparatus according to an embodiment of the present invention. As shown in fig. 2, the assembly line metrological verification device 3 includes a standard meter, an epitope isolation transformer and an epitope; the standard meter is connected with the first single-phase standard meter 1 and the epitope isolation transformer, the detection accuracy of the standard meter is 0.1 level, the epitope isolation transformer is correspondingly provided with a plurality of epitopes, the accuracy of the epitope isolation transformer is 0.05 level, and the epitopes are used for installing the second single-phase standard meter 2.
The first single-phase standard meter 1 is connected to the rear end of the standard meter in a current series and voltage parallel mode, and a pulse signal of the standard meter is directly connected into the first single-phase standard meter 1; the pulse signal of the standard table is also accessed into a second single-phase standard table 2 through an epitope isolation transformer and an epitope.
The wireless data transmission module 4 is an RS485 communication module, a Bluetooth communication module, a 3G module, a 4G module, a 5G module or a combination of the above modules.
The data analysis module 5 is a computer, and may be a PC or a notebook computer with data analysis software.
The wireless data transmission module 4 performs data transmission with the first single-phase standard meter 1 and the second single-phase standard meter 2 through RS485 communication or Bluetooth communication, and accesses a local wireless network to perform data transmission with a computer.
For a clearer explanation of the epitope isolation transformer loading error detection system of the assembly line metrological verification device, a specific example is described below, however, it should be noted that the example is only for better explaining the present invention and is not to be construed as an undue limitation on the present invention.
Firstly, build the epitope isolation transformer on-load error detection system of assembly line metrological verification device, wherein include:
2 single-phase installation type standard electric energy meters (hereinafter referred to as single-phase standard meters) are arranged: 220V, 0.1A-100A, 0.02 grade.
Automatic examination assembly line metrological verification device (hereinafter "device") 1: the device consists of a standard table, an epitope isolation transformer and an epitope, wherein the accuracy grade of the device is 0.1 grade, and the accuracy grade of the isolation transformer is 0.05 grade.
The wireless data transmission module is 1: the device comprises a DC 5V power supply, two USB interfaces, a Bluetooth module and a WIFI module.
1, computer: a data analysis system is installed.
And connecting the first installation type standard meter with current in series and voltage in parallel to the rear end of the standard meter of the device, and simultaneously connecting the high-frequency pulse of the standard meter of the device into the first installation type standard meter.
And the second installation type standard meter is accessed into the first epitope of the device, and the standard meter pulse of the device is directly accessed into the second installation type standard meter after being modified.
The wireless data transmission module is connected with a 5V power supply, Bluetooth addresses of the two installation type standard meters are set through setting software, Bluetooth communication between the wireless data transmission module and the installation type standard meters is achieved, meanwhile, the wireless data transmission module is connected with a local wireless network, and connection with a wireless local area network of a computer is achieved.
And opening the computer and operating data analysis software.
In the testing process, the device raises voltage of 220V, current (the testing current is 5A, 20A and 60A, each testing point is about 5 minutes, and the total testing time is about 15 minutes), the power factor is 1.0, the two mounting type standard electric energy meters directly start to work, and the self error of the device and the error of the epitope isolation transformer after loading are respectively tested after the power is stable.
The wireless data transmission module uploads the instantaneous quantity parameters, the basic error original values and the trimming values measured by the two mounting type standard meters to a computer, and the error difference value of the epitope isolation transformer after loading is obtained through calculation.
And adjusting the second installation type standard electric energy meter to the next meter position, sequentially obtaining the error of each meter position isolation transformer, and if the error value is less than 0.05%, determining that the error of the isolation transformer after load is qualified, thereby judging the load capacity of the isolation transformer.
In this embodiment, the threshold of the error is related to the accuracy grade of the isolation transformer, and the grades of the isolation transformer used with the conventional metrological verification device for the automated verification assembly line are 0.05% and 0.1%, that is, the threshold of R may be set to be 0.05% or 0.1% (the threshold is set according to the nominal accuracy grade of the isolation transformer).
The invention provides an epitope isolation transformer loading error detection system of an assembly line metrological verification device, which consists of a single-phase standard meter, the assembly line metrological verification device, a wireless data transmission module and a data analysis module, wherein one single-phase standard meter is connected in series at the rear end of the device standard meter, the other single-phase standard meter is arranged at a tested meter position of the device, and pulse output interfaces of the device standard meter are respectively connected into the two single-phase standard meters; when error detection is carried out, the device raises voltage and current, errors of the standard meters of the two single-phase standard meter detection devices are read through the wireless data transmission module, and error difference values of different current points of the two different single-phase standard meters are calculated through the data analysis module, so that the loading error of the epitope isolation transformer is obtained; through the combination of the single-phase standard meter and the wireless data transmission module and the data analysis system, the error detection and analysis of different epitope isolation transformers during on-load operation can be realized, so that the on-load capacity of the epitope isolation transformer can be accurately measured, and the equipment abnormity caused by insufficient on-load capacity or faults of the epitope isolation transformer can be timely found.
The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an epitope isolation transformer on-load error detection system of assembly line metrological verification device which characterized in that, this system includes: the system comprises a first single-phase standard meter (1), a second single-phase standard meter (2), an assembly line metrological verification device (3), a wireless data transmission module (4) and a data analysis module (5); wherein the content of the first and second substances,
the first single-phase standard meter (1) is connected with a pulse output interface and a voltage and current interface of the assembly line metrological verification device (3), the second single-phase standard meter (2) is installed on an epitope of the assembly line metrological verification device (3), the wireless data transmission module (4) is in communication connection with the first single-phase standard meter (1) and the second single-phase standard meter (2), and the data analysis module (5) is in communication connection with the wireless data transmission module (4);
when error detection is carried out after the epitope isolation transformer is loaded, the assembly line metering and calibrating device (3) raises voltage and current and sends out pulse signals, the first single-phase standard meter (1) and the second single-phase standard meter (2) respectively detect pulse data after the assembly line metering and calibrating device (3) and the epitope isolation transformer are loaded, the wireless data transmission module (4) receives the detected pulse data and sends the pulse data to the data analysis module (5), and the data analysis module (5) obtains an error detection result after the epitope isolation transformer is loaded according to the pulse data.
2. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 1, wherein the voltage measurement range of the first single-phase standard table (1) and the second single-phase standard table (2) is 0-400V, the current measurement range is 0.1A-100A, and the accuracy is 0.02 level.
3. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 2, wherein the assembly line metrological verification device (3) comprises a standard meter, an epitope isolation transformer and an epitope; the standard meter is connected with the first single-phase standard meter (1) and the epitope isolation transformer, the detection accuracy of the standard is 0.1 level, the epitope isolation transformer is correspondingly provided with a plurality of epitopes, the accuracy of the epitope isolation transformer is 0.05 level, and the epitopes are used for installing the second single-phase standard meter (2).
4. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 3, wherein the first single-phase standard meter (1) is connected to the rear end of the standard meter in a current series connection and voltage parallel connection mode, and the pulse signal of the standard meter is directly connected into the first single-phase standard meter (1);
the pulse signal of the standard meter is also accessed into a second single-phase standard meter (2) through an epitope isolation transformer and an epitope.
5. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 1, wherein the wireless data transmission module (4) is an RS485 communication module, a Bluetooth communication module, a 3G module, a 4G module, a 5G module or a combination of the above modules.
6. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 5, wherein said data analysis module (5) is a computer.
7. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 5, wherein the wireless data transmission module (4) is used for carrying out data transmission with the first single-phase standard meter (1) and the second single-phase standard meter (2) through RS485 communication or Bluetooth communication, and is connected to a local wireless network for carrying out data transmission with a computer.
8. The system for detecting the error of the epitope isolation transformer in the assembly line metrological verification device according to claim 1, wherein when the system is used for detecting the error of the epitope isolation transformer after being loaded, the system further comprises:
the method comprises the steps that a test voltage and a test current are raised by an assembly line metrological verification device (3), a power factor is set, a first single-phase standard meter (1) and a second single-phase standard meter (2) start to work, a wireless data transmission module (4) receives pulse data detected by the two single-phase standard meters and sends the pulse data to a data analysis module (5), and after power is stable, an error detection result of an epitope isolation transformer after loading is obtained by the data analysis module (5) according to the pulse data; wherein the error detection result is obtained according to the following formula:
R＝(R1+R2+…+Rn) The method comprises the following steps of/n, wherein R is an error detection result of an epitope isolation transformer after loading; r1、R2、…、RnN error detection results measured according to the two single-phase standard tables;
adjusting the epitope installed on the second single-phase standard table (2), sequentially carrying out error detection on each epitope isolation transformer after loading, and respectively obtaining the error detection result of each epitope isolation transformer after loading;
and if the absolute value R is smaller than the error threshold value, judging that the error of the epitope isolation transformer after loading is qualified, and if the absolute value R is larger than or equal to the error threshold value, judging that the error of the epitope isolation transformer after loading is unqualified.
9. The system for detecting the on-load error of the epitope isolation transformer of the assembly line metrological verification device as claimed in claim 8, wherein the test voltage is 220V voltage, and the test current is 5A, 20A and 60A.
10. The system for detecting the error of the epitope isolation transformer in the assembly line metrological verification device according to claim 9, wherein when the system is used for detecting the error of the epitope isolation transformer after being loaded, the system further comprises:
and respectively adopting a test voltage 220V and a test current 5A, a test voltage 220V and a test current 20A, a test voltage 220V and a test current 60A according to preset test time to carry out error detection after the current epitope isolation transformer is loaded, so as to obtain an error detection result.
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| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
| CN113030838B (en) * | 2021-03-25 | 2024-02-02 | 河南省计量科学研究院 | Electric energy meter calibrating device for on-line on-load calibration |
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