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Current sensor and measuring apparatus including current sensor

A current sensor and magnetic induction technology, applied in the field of measurement, can solve the problems of poor magnetic field uniformity and low measurement accuracy of current sensors, and achieve the effects of low installation requirements, improved accuracy and anti-interference ability, and low use

Inactive Publication Date: 2017-04-05
BEIJING JIAYUE TONGLEJI ELECTRONICS
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Problems solved by technology

[0005] In addition, since the magnetic induction unit 2 is arranged on the short side of the magnetic core 1, the gap 4 is close to the corner of the magnetic core 1, and the uniformity of the magnetic field in the gap 4 is poor, resulting in low measurement accuracy of the current sensor.

Method used

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  • Current sensor and measuring apparatus including current sensor
  • Current sensor and measuring apparatus including current sensor
  • Current sensor and measuring apparatus including current sensor

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Embodiment Construction

[0043] In order to make those skilled in the art better understand the technical solutions of the present invention, the current sensor and the measuring device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0044] like Figure 2a As shown, the current sensor provided in this embodiment includes a pair of magnetic induction units 13 and a processing unit 18 . The input end of the processing unit 18 is electrically connected to the output end of the magnetic induction unit 13 , wherein the magnetic induction unit 13 is used to sense the flow through the tested wire 19 The magnetic field generated by the current and the induction signal (voltage signal or current signal) corresponding to the size of the magnetic field is obtained; the processing unit 18 obtains the current value flowing through the tested wire 19 through differential operation, and the deviation of the induction signal can be eliminated by using ...

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Abstract

The invention provides a current sensor and a measuring apparatus. The current sensor includes a magnetic induction unit and a processing unit provided on the outside of the wire to be measured, the magnetic induction unit is used for sensing a magnetic field generated by a current flowing through the wire to be measured and obtaining an induced signal corresponding to magnetic field intensity; the input end of the processing unit is electrically connected with the output end of the magnetic induction unit to process the induced signal, and at least one pair of magnetic induction units are arranged on the outside of the wire to be measured, the processing unit obtains the value of the current flowing through the measured wire through differential operation based on the paired induced signals. The current sensor is high in measurement accuracy, high in anti-interference capability, and low in installation requirement.

Description

technical field [0001] The present invention relates to measurement technology, in particular to a sensor and a measurement device including the sensor. Background technique [0002] Electrical equipment in the fields of smart grid, wind power generation, metallurgy, chemical industry, etc. often needs to use current sensors to continuously measure the current in operation. Moreover, with the continuous improvement of related technologies in recent years, the current sensor also needs to be continuously improved and perfected in terms of technology, design and performance. [0003] Currently used current sensors include closed-loop current sensors and open-loop current sensors. figure 1 It is a schematic diagram of the structure of a closed-loop current sensor. like figure 1 As shown, the closed-loop current sensor includes a magnetic core 1 , a magnetic induction unit 2 and a compensation coil 3 wound on the outside of the magnetic core 1 . The magnetic core 1 includes ...

Claims

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Application Information

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IPC IPC(8): G01R19/00
Inventor 不公告发明人
Owner BEIJING JIAYUE TONGLEJI ELECTRONICS
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