CN114063000A - Direct current ammeter calibration device and calibration method thereof - Google Patents
Direct current ammeter calibration device and calibration method thereof Download PDFInfo
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- CN114063000A CN114063000A CN202111365485.0A CN202111365485A CN114063000A CN 114063000 A CN114063000 A CN 114063000A CN 202111365485 A CN202111365485 A CN 202111365485A CN 114063000 A CN114063000 A CN 114063000A
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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
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a DC voltage ammeter calibration device and a calibration method thereof, wherein the device comprises a computer module connected with a display module, and a constant-current and constant-voltage source module connected with a DC voltage ammeter and used for receiving instructions sent by the computer module; the switching power supply is connected with the constant-current and constant-voltage source module and provides a current voltage source for the switching power supply, and the display module is connected with the computer module and displays the operation process and the result of the computer module. The device has high precision of outputting constant voltage or constant current, small volume, light weight and high integration; a plurality of points of the required calibration points can be set for automatic output, and the required voltage or current can be manually and randomly set for output to automatically adjust the corresponding output voltage; reading the set value through communication, collecting and automatically recording a production report, greatly improving the calibration efficiency and being paperless; the coverage range is wide and the driving capability is strong.
Description
Technical Field
The invention relates to the field of electronic instrument measurement, in particular to a direct current ammeter calibration device and a calibration method thereof.
Background
The voltmeter is an instrument for measuring voltage, and the application fields comprise engineering measurement, completion of conversion of large-scale integrated circuits, application of large-scale digital measurement, application of integrated circuits and application of other circuits. The direct current ammeter is an instrument for measuring the current intensity in a direct current circuit, and the application fields comprise a solar photovoltaic power generation system, a performance test of a communication machine room distribution wire and cable plant, an industrial direct current control system, a metallurgical industry, an electroplating industry, an electrolysis industry, a wind power generation system, a direct current excitation system and the like.
The digital display current-voltage meter is a current-voltage test instrument with digital display function, and along with the continuous development of digital technology and microcomputer technology, the digital display meter and a novel display and recording instrument using a single chip microcomputer as a core are more and more widely applied to the fields of industrial automation and industrial control. The digital display meter is matched with various sensors and transmitters like a pointer meter, measures electric quantity, pressure, material level, liquid level, flow, temperature and the like, and directly displays the measured result in a digital form.
The prior calibration device and method for the direct current voltage ammeter have the following technical problems:
1. the coverage range is small, the volume is large, the output is required to be manually controlled, and the automatic multipoint strip-by-strip output aiming at different ranges cannot be realized;
2. compared with the conventional voltage and current source, the method can not realize automation by using a communication protocol, greatly improves the calibration efficiency, reduces the labor power and saves the cost aiming at the batched voltage and current meters;
3. at present, a part of pointer type ampere meters can not be driven when multiple functions are utilized.
Disclosure of Invention
The invention aims to solve the technical problems of the existing direct-current voltage ammeter calibration device and method in the background art, and designs a direct-current voltage ammeter calibration device and a direct-current voltage ammeter calibration method.
The technical scheme of the invention is that the direct current voltage ammeter calibrating device comprises a computer module connected with a display module, and a constant current and constant voltage source module which is connected with a direct current voltage ammeter and receives an instruction sent by the computer module; the switching power supply is connected with the constant-current and constant-voltage source module and provides a current voltage source for the constant-current and constant-voltage source module; and the display module is connected with the computer module and is used for displaying the operation process and the result of the computer module.
In order to further supplement the technical scheme, the computer module and the constant-current and constant-voltage source module are connected and communicated by adopting an RS485 bus.
In order to further supplement the technical scheme, the display module is an industrial control screen.
A method of calibrating a dc voltage ammeter, comprising the steps of:
S1: the switching power supply is turned on to provide a current voltage source for the constant-current and constant-voltage source module, and then the computer module sends an instruction to the constant-voltage and constant-current source module through a 485 protocol to output a constant current AConstant temperatureOr constant voltage VConstant temperature；
S2: setting an ideal calibration coefficient c to be 1, recording the feedback quantity m or n fed back to the display module by the voltmeter or the ammeter at the moment, then outputting a current sampling resistor R, and outputting an output current ATransfusion systemOr the output voltage VTransfusion systemSampling, recording the feedback quantity m 'or n' of the ammeter or voltmeter to the display module at the moment to form negative feedback, wherein the formula of the computer module is as follows:
S3: and c is compared with w or k, finally, the computer module sends data through a 485 protocol to perform precision compensation, calibration is completed, meanwhile, the display module collects the fed back data to generate a required report, data of N calibration points are automatically output, automatic recording is realized, and paperless operation is realized.
To further supplement the present solution, the N calibration points may be set to be automatically output or manually output at will.
The beneficial effects are that:
1. the instrument has high precision of outputting constant voltage or constant current, small volume, light weight and high integration;
2. a plurality of points of the required calibration points can be set for automatic output, and the required voltage or current can be manually and randomly set for output to automatically adjust the corresponding output voltage;
3. the set value is read back through communication, and a production report is collected and automatically recorded, so that the calibration efficiency is greatly improved, and no paper is needed.
4. The coverage range is wide and the driving capability is strong.
Drawings
FIG. 1 is a schematic structural diagram of a DC ammeter calibration device according to the present invention;
fig. 2 is a flowchart of implementation of dc current table calibration provided in embodiment 1 of the present invention;
FIG. 3 is a flowchart of an implementation of calibration of a DC voltmeter provided in embodiment 2 of the present invention
In the figure, 1, a computer module; 2. a constant current and constant voltage source module; 3. a display module; 4. a switching power supply; 5. and a direct current voltage ammeter.
Detailed Description
The invention is described in detail with reference to the accompanying drawings, and as shown in fig. 1, the dc ammeter calibration device comprises a computer module connected to a display module, wherein the display module is an industrial control screen, and the dc ammeter calibration device further comprises a constant-current and constant-voltage source module connected to a dc ammeter and receiving instructions sent by the computer module; the switching power supply is connected with the constant-current and constant-voltage source module and provides a current voltage source for the constant-current and constant-voltage source module; and the display module is connected with the computer module and is used for displaying the operation process and the result of the computer module. And the computer module and the constant-current and constant-voltage source module are connected and communicated by adopting an RS485 bus.
A method for calibrating a DC voltage ammeter comprises the following steps:
S1: the switching power supply is turned on to provide a current voltage source for the constant-current and constant-voltage source module, and then the computer module sends an instruction to the constant-voltage and constant-current source module through a 485 protocol to output a constant current AConstant temperatureOr constant voltage VConstant temperature；
S2: setting a desired calibration systemRecording feedback quantity m or n fed back to the display module by the voltmeter or ammeter at the moment when the number c is 1, then outputting a current sampling resistor R, and outputting an output current ATransfusion systemOr the output voltage VTransfusion systemSampling, recording the feedback quantity m 'or n' of the ammeter or voltmeter to the display module at the moment to form negative feedback, wherein the formula of the computer module is as follows:
S3: and c is compared with w or k, finally, the computer module sends data through a 485 protocol to perform precision compensation, calibration is completed, meanwhile, the display module collects the fed back data to generate a required report, data of N calibration points are automatically output, automatic recording is realized, and paperless operation is realized.
Example 1
As shown in fig. 2, a method for calibrating a dc current meter includes the following steps:
S1: the switching power supply is turned on to provide a current voltage source for the constant-current and constant-voltage source module, and then the computer module sends an instruction to the constant-voltage and constant-current source module through a 485 protocol to output a constant current AConstant temperature；
S2: setting an ideal calibration coefficient c to be 1, recording a feedback quantity m fed back to the display module by the ammeter at the moment, and then outputting a current sampling resistor R1Output current ATransfusion systemSampling, recording the feedback m of the ammeter to the display module at the moment1' forming negative feedback, the computer module formula is as follows:
S3: c and w are1And finally, the computer module sends data through a 485 protocol to perform precision compensation and complete calibration, and meanwhile, the display module acquires the data fed back to generate a required report, so that the data of N calibration points are automatically output, the data are automatically recorded, and paperless effect is realized.
Example 2
As shown in fig. 3, a method for calibrating a dc voltage meter includes the following steps:
S1: the switching power supply is turned on to provide a current voltage source for the constant-current and constant-voltage source module, and then the computer module sends an instruction to the constant-voltage and constant-current source module through a 485 protocol to output a constant voltage VConstant temperature；
S2: setting an ideal calibration coefficient c to be 1, recording a feedback quantity n fed back to the display module by the voltmeter at the moment, and then outputting a current sampling resistor R1Output voltage VTransfusion systemSampling back, recording the feedback quantity n of the voltmeter to the display module at the moment1' forming negative feedback, the computer module formula is as follows:
S3: c and k are1And finally, the computer module sends data through a 485 protocol to perform precision compensation and complete calibration, and meanwhile, the display module acquires the data fed back to generate a required report, so that the data of N calibration points are automatically output, the data are automatically recorded, and paperless effect is realized.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (5)
1. A DC voltage ammeter calibration device comprises a computer module connected with a display module, and is characterized by also comprising a constant-current and constant-voltage source module connected with a DC voltage ammeter and used for receiving instructions sent by the computer module; the switching power supply is connected with the constant-current and constant-voltage source module and provides a current voltage source for the constant-current and constant-voltage source module; and the display module is connected with the computer module and is used for displaying the operation process and the result of the computer module.
2. The device for calibrating the DC voltage ammeter according to claim 1, wherein the computer module and the constant current and constant voltage source module are connected and communicated by an RS485 bus.
3. The device according to claim 1, wherein the display module is an industrial control screen.
4. A calibration method for a direct current voltage ammeter is characterized by comprising the following steps:
S1: the switching power supply is turned on to provide a current voltage source for the constant-current and constant-voltage source module, and then the computer module sends an instruction to the constant-voltage and constant-current source module through a 485 protocol to output a constant current AConstant temperatureOr constant voltage VConstant temperature；
S2: setting an ideal calibration coefficient c to be 1, recording the feedback quantity m or n fed back to the display module by the voltmeter or the ammeter at the moment, then outputting a current sampling resistor R, and outputting an output current ATransfusion systemOr the output voltage VTransfusion systemSampling, recording the feedback quantity m 'or n' of the ammeter or voltmeter to the display module at the moment to form negative feedback, wherein the formula of the computer module is as follows:
S3: and c is compared with w or k, finally, the computer module sends data through a 485 protocol to perform precision compensation, calibration is completed, meanwhile, the display module collects the fed back data to generate a required report, data of N calibration points are automatically output, automatic recording is realized, and paperless operation is realized.
5. The method according to claim 4, wherein the N calibration points are set to be automatically output or manually output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365485.0A CN114063000A (en) | 2021-11-17 | 2021-11-17 | Direct current ammeter calibration device and calibration method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111365485.0A CN114063000A (en) | 2021-11-17 | 2021-11-17 | Direct current ammeter calibration device and calibration method thereof |
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| Publication Number | Publication Date |
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| CN114063000A true CN114063000A (en) | 2022-02-18 |
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| CN202111365485.0A Withdrawn CN114063000A (en) | 2021-11-17 | 2021-11-17 | Direct current ammeter calibration device and calibration method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110691A (en) * | 2023-10-23 | 2023-11-24 | 威海锐恩电子股份有限公司 | Power equipment data acquisition system |
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2021
- 2021-11-17 CN CN202111365485.0A patent/CN114063000A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110691A (en) * | 2023-10-23 | 2023-11-24 | 威海锐恩电子股份有限公司 | Power equipment data acquisition system |
| CN117110691B (en) * | 2023-10-23 | 2024-05-07 | 威海锐恩电子股份有限公司 | Power equipment data acquisition system |
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Application publication date: 20220218 |