CN207318694U - A kind of non-contact type current instrument on-line calibration device - Google Patents
A kind of non-contact type current instrument on-line calibration device Download PDFInfo
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- CN207318694U CN207318694U CN201721069664.9U CN201721069664U CN207318694U CN 207318694 U CN207318694 U CN 207318694U CN 201721069664 U CN201721069664 U CN 201721069664U CN 207318694 U CN207318694 U CN 207318694U
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Abstract
Metering device detection field is the utility model is related to, especially a kind of non-contact type current instrument on-line calibration device, a kind of non-contact type current instrument on-line calibration device, it is characterised in that：Including two magnetic cores, two magnetic core is a main magnetic core and an auxiliary magnetic core, the auxiliary magnetic core is used for the leakage field for circuit to be checked, excitation loss is detected, the auxiliary magnetic core is by leakage field, excitation loss is sent to compensation control module by detection winding, the compensation control module is connected with the control terminal of compensation power module, the compensation power module provides compensation by compensative winding for main magnetic core, the sensed position of the main magnetic core is provided with a Hall sensor, the Hall sensor is connected with a sampling processing module, the voltage output end of the Hall sensor is in parallel with a sampling resistor, the sampling resistor is connected with a display module；Two magnetic core is designed using opening, for exempting from dismounting access with the busbar of circuit to be checked, carries out non-contact measurement.
Description
Technical field
Metering device detection field is the utility model is related to, especially a kind of non-contact type current instrument on-line calibration dress
Put.
Background technology
Electric instrument cabinet is widely used in electric power enterprise, manufactures electric current, the monitoring work of voltage of enterprise.In view of should
With the particularity of industry, as a rule, these enterprises can not power off operation, so for the electricity on electric instrument cabinet
Flow instrument can not be completed with regard to conventional metered dose mode, the work of its magnitude tracing, this will cause monitoring, the measurement of electric instrument instrument
There are larger potential risk, therefore the importance of the research to the on-line metering of current instrument increasingly highlights.
Traditional current measurement is to concatenate to return into current measurement by current transformer, current divider and current sensor etc.
Road measures, and this method still needs to power operation, can not meet industrial requirement.And loop current tester, clamp on amperemeter etc.
Can open type contactless current instruments due to opening leakage field it is larger, without compensation function, cause its accuracy
Grade is relatively low, can not meet the calibration to instrument.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided and it is a kind of rational in infrastructure, it is contactless, effectively
Compensation, a kind of high non-contact type current instrument on-line calibration device of accuracy.
The technical scheme adopted by the utility model is that：
1st, a kind of non-contact type current instrument on-line calibration device, it is characterised in that：Including two magnetic cores, which is one
Main magnetic core and an auxiliary magnetic core, the auxiliary magnetic core are used for the leakage field for circuit to be checked, and excitation loss is detected, the auxiliary
Leakage field, excitation loss are sent to compensation control module by magnetic core by detection winding, and the compensation control module is connected with compensation
The control terminal of power module, the compensation power module provide compensation, the sensing of the main magnetic core by compensative winding for main magnetic core
Position is provided with a Hall sensor, which is connected with a sampling processing module, the voltage of the Hall sensor
Output terminal is in parallel with a sampling resistor, which is connected with a display module.
The advantages of the utility model and good effect are：
In the utility model, using bimag structure and detection winding, compensative winding, which is engaged, to be compensated, auxiliary magnetic core
It is detected for the leakage field to circuit to be checked and excitation loss by the way of contactless, passes through magnetic recording level in detection process
Weighing apparatus principle is by due to the error of leakage field and excitation generation, winding is sent to compensation control module after testing, compensation control module control
Compensation power module will compensate main magnetic core by compensative winding due to the error of leakage field and excitation generation, and eventually through
Hall sensor sensing is transmitted to sampling processing module, and in detection process, the class of accuracy of current measurement will be far below electricity
The grade of measurement is pressed, because the collection current signal of Hall sensor can be converted to the output of voltage signal by sampling resistor,
Easy to improve the accuracy of detection, and the information detected can be read out by display module.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
Embodiment
With reference to embodiment, following embodiments, which are illustrative, are not limited is further illustrated to the utility model
, it is impossible to limit the scope of protection of the utility model with following embodiments.
A kind of non-contact type current instrument on-line calibration device, the innovation of the utility model is, including two magnetic cores, this two
Magnetic core is a main magnetic core and an auxiliary magnetic core, and the auxiliary magnetic core is used for for the first winding shown in circuit, that is, Fig. 1 to be checked
Leakage field, excitation loss are detected, which is sent to compensation control mould by leakage field, excitation loss by detection winding
Block, the compensation control module are connected with the control terminal of compensation power module, and the compensation power module is by based on compensative winding
Magnetic core provides compensation, and the sensed position of the main magnetic core is provided with a Hall sensor, which is connected with a sampling
Processing module, the voltage output end of the Hall sensor is in parallel with a sampling resistor, which is connected with a display mould
Block.
In the present embodiment, core material of the magnetic core selection with wider frequency range, it is corresponding can to obtain preferable frequency.
In the present embodiment, accessed using the punching busbar for meeting 1000A as magnetic core.
The course of work of utility model：
In the utility model, using bimag structure and detection winding, compensative winding, which is engaged, to be compensated, auxiliary magnetic core
It is detected for the leakage field to circuit to be checked and excitation loss by the way of contactless, passes through magnetic recording level in detection process
Weighing apparatus principle is by due to the error of leakage field and excitation generation, winding is sent to compensation control module after testing, compensation control module control
Compensation power module will compensate main magnetic core by compensative winding due to the error of leakage field and excitation generation, and eventually through
Hall sensor sensing is transmitted to sampling processing module, and in detection process, the class of accuracy of current measurement will be far below electricity
The grade of measurement is pressed, because the collection current signal of Hall sensor can be converted to the output of voltage signal by sampling resistor,
Easy to improve the accuracy of detection, and the information detected can be read out by display module.
The utility model provide it is a set of there is Magnetic Flux Leakage Inspecting and leakage field compensation function, class of accuracy is not less than 0.2 grade
Non-contact type current instrument on-line calibration device.The device can be right in the case of low-voltage electrical instrument cabinet livewire work
The ammeter of below 1000A is directly calibrated.
Claims (2)
- A kind of 1. non-contact type current instrument on-line calibration device, it is characterised in that：Including two magnetic cores, which is a main magnetic Core and an auxiliary magnetic core, the auxiliary magnetic core are used for the leakage field for circuit to be checked, and excitation loss is detected, the auxiliary magnetic core By leakage field, excitation loss is sent to compensation control module by detection winding, and the compensation control module is connected with compensation power supply The control terminal of module, the compensation power module provide compensation, the sensed position of the main magnetic core by compensative winding for main magnetic core One Hall sensor is installed, which is connected with a sampling processing module, the voltage output of the Hall sensor End is in parallel with a sampling resistor, which is connected with a display module.
- A kind of 2. non-contact type current instrument on-line calibration device according to claim 1, it is characterised in that：Two magnetic Core is designed using opening, for exempting from dismounting access with the busbar of circuit to be checked, carries out non-contact measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721069664.9U CN207318694U (en) | 2017-08-25 | 2017-08-25 | A kind of non-contact type current instrument on-line calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721069664.9U CN207318694U (en) | 2017-08-25 | 2017-08-25 | A kind of non-contact type current instrument on-line calibration device |
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| Publication Number | Publication Date |
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| CN207318694U true CN207318694U (en) | 2018-05-04 |
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| CN201721069664.9U Active CN207318694U (en) | 2017-08-25 | 2017-08-25 | A kind of non-contact type current instrument on-line calibration device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646836A (en) * | 2018-06-22 | 2018-10-12 | 中国科学院高能物理研究所 | High-power Precision Current Component, batch calibrating installation, electric current generates and calibration method |
| CN109683009A (en) * | 2019-01-17 | 2019-04-26 | 上海崇林汽车电子有限公司 | A kind of magnetic circuit device of large range high precision Hall current sensor |
| CN111289919A (en) * | 2020-04-03 | 2020-06-16 | 广州市扬新技术研究有限责任公司 | Multi-range contact net leakage current detection device |
| CN111785510A (en) * | 2020-07-01 | 2020-10-16 | 南京丹迪克电力仪表有限公司 | Method for preparing high-accuracy two-stage split core type current transformer |
-
2017
- 2017-08-25 CN CN201721069664.9U patent/CN207318694U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646836A (en) * | 2018-06-22 | 2018-10-12 | 中国科学院高能物理研究所 | High-power Precision Current Component, batch calibrating installation, electric current generates and calibration method |
| CN109683009A (en) * | 2019-01-17 | 2019-04-26 | 上海崇林汽车电子有限公司 | A kind of magnetic circuit device of large range high precision Hall current sensor |
| CN111289919A (en) * | 2020-04-03 | 2020-06-16 | 广州市扬新技术研究有限责任公司 | Multi-range contact net leakage current detection device |
| CN111785510A (en) * | 2020-07-01 | 2020-10-16 | 南京丹迪克电力仪表有限公司 | Method for preparing high-accuracy two-stage split core type current transformer |
| CN111785510B (en) * | 2020-07-01 | 2022-03-15 | 南京丹迪克电力仪表有限公司 | Method for preparing high-accuracy two-stage split core type current transformer |
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