CN211453926U - Automatic calibration system of digital multimeter - Google Patents
Automatic calibration system of digital multimeter Download PDFInfo
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- CN211453926U CN211453926U CN201921561118.6U CN201921561118U CN211453926U CN 211453926 U CN211453926 U CN 211453926U CN 201921561118 U CN201921561118 U CN 201921561118U CN 211453926 U CN211453926 U CN 211453926U
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Abstract
The utility model relates to the technical field of universal meter calibration, in particular to an automatic calibration system of a digital universal meter, which comprises a standard source, a wiring base, a camera, an output control module and an image identification module; the standard source is used for outputting voltage, resistance or current signals and is respectively connected with the output control module and the wiring base; the output control module is used for controlling the standard source to output signals; a plurality of digital multimeters can be placed on the wiring base; the camera is connected with the image recognition module, the camera is used for collecting the indicating value image of the digital multimeter, and the image recognition module is used for recognizing the indicating value image and reading and recording the indicating number. The utility model discloses in, through intelligent control output signal and automatic data acquisition, the digital multimeter who has solved and has existed among the prior art relies on manual operation to carry out data acquisition always, leads to the problem that the data accuracy can not be guaranteed to appear.
Description
Technical Field
The utility model relates to an universal meter calibration technical field refers in particular to a digital universal meter's automatic calibration system.
Background
The digital multimeter is an instrument which converts analog quantity into digital form to measure, calculate and display by adopting a digital measurement technology, and can generally measure parameters such as alternating current and direct current voltage, alternating current and direct current, resistance and the like. Digital multimeters are largely classified into three types: laboratory, bench and hand-held, applied to various tests in power system operations. The national measurement administration sets up the calibration standard of the digital multimeter, and the digital multimeter needs to be calibrated regularly to ensure the accurate measurement value.
The digital multimeter has no program control interface, can only display the reading through the LED nixie tube, and is difficult to realize the automatic acquisition of data, so the data acquisition and the record in the calibration process of the digital multimeter are always carried out by manual operation. In the calibration process, the setting of the standard source output value and the recording of the measured representation value need to be carried out manually and repeatedly, so that the problems of artificial reading deviation, illegible handwriting, recording errors and the like can be avoided, the time consumption of manual transcription of data is long, and the accuracy cannot be ensured; and in the calibration process, the phenomenon of burning out of the digital multimeter due to overcurrent of current ranges caused by improper operation of testers often occurs.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: rely on manual operation to carry out data acquisition always in order to solve the digital multimeter that exists among the prior art, lead to the problem that the data accuracy can not be guaranteed to appear, the utility model provides an automatic calibration system of digital multimeter.
In order to solve the problems existing in the prior art, the utility model adopts the following technical scheme:
an automatic calibration system of a digital multimeter comprises a standard source, a wiring base, a camera, an output control module and an image identification module; the standard source is used for outputting voltage, resistance or current signals and is respectively connected with the output control module and the wiring base; the output control module is used for controlling the standard source output signal; a plurality of digital multimeters can be placed on the wiring base; the camera with the image recognition module is connected, the camera is used for gathering the indicating value image of digital multimeter, the image recognition module is used for discerning the indicating value image and reading the record indicating number.
As an improvement of the technical proposal of the automatic calibration system of the digital multimeter, the standard source is provided with an output end; an input terminal group is arranged on the wiring base, and the output end is connected with the input terminal group.
As an improvement of the technical scheme of the automatic calibration system of the digital multimeter, the output end comprises a voltage or resistance output end and a current output end; the input terminal group comprises a voltage input terminal, a resistance input terminal and a current input terminal, and the output terminal is correspondingly connected with the input terminal.
As the utility model discloses digital multimeter's automatic calibration system's a technical scheme's improvement, it is used for fixing to be provided with six on the wiring base digital multimeter's epitope, and every epitope all be provided with the link that input subunit is connected, the link with digital multimeter is connected.
As an improvement of the technical solution of the automatic calibration system of the digital multimeter of the present invention, the input terminal group further comprises a micro-current input terminal, the micro-current input terminal is connected with the connecting end, and the micro-current input terminal is connected with the output end; and a current protection module is arranged between the connecting end and the output end.
As the utility model discloses digital multimeter's automatic calibration system's a technical scheme's improvement, the region that the image was gathered to the camera is the collection area territory, the collection area territory covers on six epitopes.
As an improvement of the technical scheme of the automatic calibration system of the digital multimeter, the standard source is a FLUKE5522A type calibrator.
As the utility model discloses digital multimeter's automatic calibration system's a technical scheme's improvement, digital multimeter is FLUKE179 type digital multimeter.
As an improvement of the technical scheme of the automatic calibration system of the digital multimeter of the utility model, the camera is a HF900 wide dynamic industrial camera.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the output control module controls the standard source to output voltage, resistance or current signals, so that the intelligent control of the output signals is realized;
2. the indicating value image is collected through the camera, the indicating number in the indicating value image is identified through the image identification module, and the recorded data is read, so that the automation of data collection is realized;
3. through intelligent control output signal and automatic data acquisition, the problem that the accuracy of data can not be guaranteed because a digital multimeter in the prior art always depends on manual operation to acquire data is solved.
Drawings
Fig. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic diagram of the calibration voltage or resistance of the present invention;
fig. 3 is a schematic diagram illustrating the principle of the calibration current of the present invention.
Description of reference numerals: 1-standard source; 2-a wiring base; 3-a camera; 4-an output control module; 5-an image recognition module; 6-an output end; 7-input terminal group; 8-voltage or resistance input terminals; 9-current input terminal; 10-micro current input terminal; 11-a current protection module; 12-epitope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
As shown in FIG. 1, the automatic calibration system of the digital multimeter comprises a standard source 1, a wiring base 2, a camera 3, an output control module 4 and an image identification module 5.
The standard source 1 is used for outputting voltage, resistance or current signals, the standard source 1 is respectively connected with the output control module 4 and the wiring base 2, the output control module 4 is used for controlling the output signals of the standard source 1, and the wiring base 2 can be used for placing a plurality of digital multimeters. The camera 3 is connected with the image recognition module 5, the camera 3 is used for collecting the indicating value image of the digital multimeter, and the image recognition module 5 is used for recognizing the indicating value image and reading and recording the indicating number.
In the time of the calibration, place many digital multimeters on wiring base 2, through output control module 4 control standard source 1 to wiring base 2 output voltage, resistance or current signal, voltage, resistance or current signal all have numerical value to show behind many digital multimeters on many digital multimeters, treat that numerical value is stable back, gather the indicating value image through camera 3, through the indicating number in the image recognition indicating value image of image recognition module 5 discernment and read the record indicating number, digital multimeter's automatic calibration has been realized.
The utility model discloses in, through 1 output voltage in output control module 4 control standard source, resistance or current signal, realized output signal's intelligent control, then through camera 3 collection indicating value image, then through the registration in the 5 discernment indicating value images of image recognition module and read the record, solved the digital multimeter that exists among the prior art and relied on manual operation to carry out data acquisition always, lead to the problem that the data accuracy can not be guaranteed to appear.
Furthermore, an output end 6 is arranged on the standard source 1, an input end group 7 is arranged on the wiring base 2, and the output end 6 is connected with the input end group 7. Furthermore, the output terminal 6 includes a voltage or resistance output terminal and a current output terminal, the input terminal group 7 includes a voltage or resistance input terminal 8 and a current input terminal 9, and the output terminal 6 is connected to the input terminals.
Specifically, the input terminal group 7 includes a current input terminal 9 and a voltage or resistance input terminal 8, and the voltage or resistance input terminal 8 can be a resistance input terminal or a voltage input terminal according to an input signal. The output terminal 6 includes a current output terminal, a voltage or resistance output terminal, and the voltage or resistance output terminal can become a resistance output terminal or a voltage output terminal according to the output signal. The output end 6 is correspondingly connected with the input end group 7, namely when the output end 6 is a current output end, the current output end is connected with the current input terminal 9; when the output end 6 is a voltage output end, the voltage output end is connected with the voltage input terminal; when the output terminal 6 is a resistance output terminal, the resistance output terminal is connected to the resistance input terminal.
Six epitopes 12 used for fixing the digital multimeter are arranged on the wiring base 2, each epitope 12 is provided with a connecting end connected with the input terminal group 7, and the connecting ends are connected with the digital multimeter, so that the calibration and the data acquisition of the six digital multimeters through one standard source 1 can be realized.
Furthermore, the input terminal group 7 further comprises a micro-current input terminal 10, the micro-current input terminal 10 is connected with the connecting end, the connecting end is connected with the output end, a current protection module 11 is arranged between the output end and the connecting end, and when the current input by the micro-current input terminal 10 is larger than a specified value, a current loop can be automatically cut off to protect the digital multimeter. The current protection module 11 functions similar to a fuse, and is not described in detail herein.
The region of the camera 3 for collecting images is a collecting region, the collecting region covers six epitopes 12, and data of six digital multimeters can be collected by the camera 3 at one time. And the acquisition regions are covered on the six epitopes 12, so that the camera 3 can acquire the indication value image more accurately.
As shown in fig. 2, as a first embodiment of the present invention, when a voltage signal of the digital multimeter needs to be collected, the voltage or resistance input terminal 8 becomes a voltage input terminal. Under the control of the output control module 4, a voltage output end in the standard source 1 outputs a voltage signal to a voltage input terminal, the output voltage signal is a standard voltage signal, the voltage signal is simultaneously provided for six digital multimeters through a parallel loop, after the readings of the digital multimeters are stable, the cameras 3 collect the indicating value images one by one, and then the image identification module 5 identifies the indicating value images and reads and records the indicating values.
As shown in fig. 2, as a second embodiment of the present invention, when a resistance signal of the digital multimeter needs to be collected, the voltage or resistance input terminal 8 becomes a resistance input terminal. Under the control of the output control module 4, the resistance output end in the standard source 1 outputs voltage signals to the resistance input terminal, the resistance signals are sequentially provided for six digital multimeters through a parallel loop, after the readings of the digital multimeters are stable, the cameras 3 collect indicating value images one by one, and then the image recognition module 5 recognizes the indicating value images and reads and records the readings.
As shown in fig. 3, as the utility model discloses a third embodiment, when the current signal of digital multimeter needs to be gathered, current output end in the standard source 1 is to current input terminal 9 output current signal, and the current signal of output is standard current signal, and current signal provides six digital multimeters simultaneously through series circuit, treats digital multimeter registration stabilization back, gathers the indicating value image one by camera 3, then 5 discernment indicating value images of image recognition module read the record indicating value.
The utility model discloses in, through output control module 4 control standard source 1's signal output, can be voltage signal, resistance signal or current signal through the signal of output control module 4 intelligent control standard source 1 output, also can be through the size of output control module 4 control standard source 1 output signal, realized the intelligent control of standard source 1 output. After the camera 3 collects the indicating value images of a plurality of digital multimeters, the data in the indicating value images can be identified through the image identification module 5, and the data is recorded, so that the data collection effect is realized, and the calibration efficiency is improved.
Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Claims (9)
1. An automatic calibration system of a digital multimeter is characterized by comprising a standard source, a wiring base, a camera, an output control module and an image identification module; the standard source is used for outputting voltage, resistance or current signals and is respectively connected with the output control module and the wiring base; the output control module is used for controlling the standard source output signal; a plurality of digital multimeters can be placed on the wiring base; the camera with the image recognition module is connected, the camera is used for gathering the indicating value image of digital multimeter, the image recognition module is used for discerning the indicating value image and reading the record indicating number.
2. The automatic calibration system of a digital multimeter of claim 1, wherein an output is provided on the standard source; an input terminal group is arranged on the wiring base, and the output end is connected with the input terminal group.
3. The automatic calibration system for a digital multimeter of claim 2 wherein the output comprises a voltage or resistance output and a current output; the input terminal group comprises a voltage input terminal, a resistance input terminal and a current input terminal, and the output terminal is correspondingly connected with the input terminal.
4. The automatic calibration system of a digital multimeter of claim 2, wherein six epitopes for fixing the digital multimeter are arranged on the wiring base, and each epitope is provided with a connection end connected with the input terminal group, and the connection end is connected with the digital multimeter.
5. The automatic calibration system of a digital multimeter of claim 4 wherein said set of input terminals further comprises a micro-current input terminal, said micro-current input terminal being connected to said connection terminal and said output terminal; and a current protection module is arranged between the connecting end and the output end.
6. The automatic calibration system of a digital multimeter of claim 5, wherein the area where the camera captures images is a capture area, the capture area being overlaid on the six epitopes.
7. The system for automatic calibration of a digital multimeter of claim 1 wherein the calibration source is a FLUKE5522A type calibrator.
8. The system for automatic calibration of a digital multimeter of claim 1, wherein the digital multimeter is a FLUKE model 179 digital multimeter.
9. The automatic calibration system for a digital multimeter of claim 1 wherein the camera is an HF900 wide dynamic industrial camera.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921561118.6U CN211453926U (en) | 2019-09-19 | 2019-09-19 | Automatic calibration system of digital multimeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921561118.6U CN211453926U (en) | 2019-09-19 | 2019-09-19 | Automatic calibration system of digital multimeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557983A (en) * | 2020-11-20 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Digital multimeter intelligent calibration gear shifting device based on image recognition |
| CN113884962A (en) * | 2021-09-23 | 2022-01-04 | 刘正祥 | Automatic metering and calibrating device of track insulation measuring instrument based on image recognition |
| CN114089247A (en) * | 2021-11-19 | 2022-02-25 | 国网新疆电力有限公司电力科学研究院 | Automatic calibrating installation of universal meter based on image recognition technology |
-
2019
- 2019-09-19 CN CN201921561118.6U patent/CN211453926U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557983A (en) * | 2020-11-20 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Digital multimeter intelligent calibration gear shifting device based on image recognition |
| CN113884962A (en) * | 2021-09-23 | 2022-01-04 | 刘正祥 | Automatic metering and calibrating device of track insulation measuring instrument based on image recognition |
| CN114089247A (en) * | 2021-11-19 | 2022-02-25 | 国网新疆电力有限公司电力科学研究院 | Automatic calibrating installation of universal meter based on image recognition technology |
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