An Electrostatic Field Tester Based on Hall Sensor

A Hall sensor, electrostatic field technology, applied in electrostatic field measurement and other directions, can solve the problems of electrostatic detection equipment being easily interfered by external signals, low test accuracy, etc., and achieve the effects of low cost, improved test accuracy, and high sensitivity

Active Publication Date: 2019-05-31
昆山兢美电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrostatic detection equipment disclosed in this patent is susceptible to external signal interference, and the test accuracy is low

Method used

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  • An Electrostatic Field Tester Based on Hall Sensor
  • An Electrostatic Field Tester Based on Hall Sensor
  • An Electrostatic Field Tester Based on Hall Sensor

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] according to figure 1 Shown, a kind of electrostatic field tester based on Hall sensor comprises the electrostatic field acquisition unit 100, signal amplifying unit 200, A / D conversion module 300, single-chip microcomputer storage system 400 and display unit 500 connected in sequence; The acquisition unit 100 includes a Hall sensor 110 and a constant current power supply module 120 that provides a stable operating voltage to the Hall sensor 110; since the reference voltage of the Hall sensor 110 is 2.6V, in real life, the general power supply voltage is 5V or 12V , therefore, the present invention sets a 2.6V constant current power supply module, such as figure 2 As shown, the constant current power supply module 120 includes a voltage regulator tube D1, a sliding rheostat RV1 and a +5V power supply, the cathode of the voltage regulator tube D1 is connected t...

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Abstract

The invention discloses a hall-sensor-based electrostatic field tester, comprising an electrostatic field acquisition unit, a signal amplifying unit, an A / D (analog / digital) conversion module, a single-chip microcomputer storage system and a display unit; the electrostatic field acquisition unit comprises a hall sensor and a constant-current power module providing stable operating voltage for the hall sensor; the signal amplifying unit comprises a differential input circuit, an in-phase amplifying circuit, an inverse phase amplifying circuit, a displacement circuit and a selector circuit, selection is made by the selector circuit, and a forward electric field or a reverse electric field is output. The hall-sensor-based electrostatic field tester is low in cost, small in size and high in sensitivity, has wide adaptive frequency and temperature ranges, and is suitable for measuring both constant electric fields and alternating electric fields.

Description

technical field [0001] The invention relates to the field of electrostatic testing, in particular to an electrostatic field tester based on a Hall sensor. Background technique [0002] With the rapid development of science and technology, especially the rapid rise of high-tech industries such as electronics, IT, and aerospace, a large number of electronic products use integrated circuits and VLSIs. However, many electronic devices are extremely sensitive to static electricity, commonly known as electrostatic sensitive devices. Although the energy of electrostatic discharge has little effect on traditional separation devices, the electrostatic field and electrostatic current generated by static electricity will become the fatal killer of devices, making their Functional failure or "soft breakdown" that is hard to find, resulting in product hardware damage or malfunction, directly affecting product quality, life, reliability and economy. In order to prevent the harm caused by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/12
CPCG01R29/12
Inventor 赵洪珍
Owner 昆山兢美电子科技有限公司
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