High-frequency pulse digital ground resistance tester

A resistance tester, high-frequency pulse technology, applied in the direction of grounding resistance measurement, measuring resistance/reactance/impedance, instruments, etc., can solve the problems of single frequency, slow change, can not respond well to grounding impedance, etc., to achieve easy portability , Reduce external interference, and facilitate field operations

Pending Publication Date: 2020-02-28
成都奥力斯电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used grounding resistance tester, shaker type or digital type, uses high and low voltage low frequency AC, high voltage and low frequency AC, high and low voltage variable frequency AC, high and low voltage DC to flow through the measured bod

Method used

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  • High-frequency pulse digital ground resistance tester

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Embodiment Construction

[0037]In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0038] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0039] Those skilled in the art should understand that in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", ...

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Abstract

The invention discloses a high-frequency pulse digital ground resistance tester. The high-frequency pulse digital ground resistance tester comprises a power source, a high-frequency pulse generator, ameasured ground resistor circuit, an analog-to-digital conversion circuit, an MCU and a display device. The power source is used for supplying electric power to the tester. The high-frequency pulse generator is used for generating 20KHz square waves with the duty ratio being 50%, and inputting the square waves into the measured ground resistor circuit. The analog-to-digital conversion circuit isused for converting testing voltage of the measured ground resistor circuit into a digital signal and transmitting the digital signal to the MCU to process. The MCU calculates the received digital signal and calculates a resistance value of a measured ground resistor. The waveform of a square wave of a measured grounding point is displayed in the display device. The MCU is also used for controlling the analog-to-digital conversion circuit. The tester has the advantages that voltage waveforms of to-be-measured points can be displayed through a display screen, and the types of ground resistors of the to-be-measured points can be further determined; the high-frequency pulse digital ground resistance tester is powered by a rechargeable battery, external interferences are reduced, field operations are facilitated, the tester is portable, and testing is facilitated.

Description

technical field [0001] The invention relates to the field of grounding resistance testers, in particular to a high-frequency pulse digital grounding resistance tester. Background technique [0002] In order to meet the needs of work and safety in the power system, it is often necessary to connect some parts of the power system and its electrical equipment to the ground. Because the earth contains conductive substances such as water in nature. It is therefore also conductive. When a charged conductor is in contact with the earth, a hemispherical "earth electric field" with the ground point as the center of the sphere will be formed. At this time, the grounding current flows into the earth from the grounding point through the conductor, and spreads around in a hemispherical shape. Whether the grounding device is good or not is directly related to the safety of people and equipment, and even involves the normal and stable operation of the system. Grounding can prevent peopl...

Claims

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Application Information

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IPC IPC(8): G01R27/20
CPCG01R27/205
Inventor 张皓
Owner 成都奥力斯电子科技有限公司
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