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High-voltage excited Wheatstone bridge measurement method

A measurement method, high-voltage excitation technology, applied in the direction of using electric/magnetic devices to transmit sensing components, etc., can solve the problem of low measurement sensitivity of the Wheatstone bridge, reduce measurement power consumption, reduce heat generation, and increase drive voltage Effect

Active Publication Date: 2021-05-28
CHONGQING KAIJIN TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention provides a high-voltage excitation Wheatstone bridge measurement method, which solves the above-mentioned technical problem of low measurement sensitivity of the Wheatstone bridge

Method used

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  • High-voltage excited Wheatstone bridge measurement method

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Embodiment Construction

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention. In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0020] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be direc...

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Abstract

The invention relates to the technical field of instrument and meter detection, in particular to a high-voltage excited Wheatstone bridge measurement method, which comprises the following steps of: S1, converting a bridge arm fixed voltage of a Wheatstone bridge into an excitation pulse voltage, cancelling fixed voltage supply, and dynamically adjusting the amplitude of the excitation voltage of excitation pulse according to a sensitivity coefficient of measured equipment; S2, when the excitation pulse voltage enters a stable holding interval, starting ADC sampling; and S3, when data sampling is completed, triggering the excitation pulse voltage for turning off the Wheatstone bridge, stopping the voltage supply to the Wheatstone bridge, enabling the whole to enter a descending interval, and stopping ADC sampling. By modifying a conventional bridge and introducing a pulse measurement mode, the driving voltage of the Wheatstone bridge can be greatly improved, the sensitivity can be improved, the measurement power consumption can be reduced, and the heating problem caused by long-term direct current power supply can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of instrumentation detection, in particular to a high-voltage excitation Wheatstone bridge measurement method. Background technique [0002] The Wheatstone bridge is a very important key technology in common stress and strain measurement. The Wheatstone bridge is a bridge circuit composed of four resistors. These four resistors are called the bridge arms of the bridge. The Wheatstone bridge Changes in physical quantities are measured using changes in resistance. It is often used in the collection of weak signals such as various weighing and medical equipment. [0003] Due to the principle of the Wheatstone bridge balance bridge. The system has very high sensitivity and can output a very good signal after passing through the instrumentation amplifier. However, if the sensitivity of the component under test is not high enough, the signal after passing through the instrumentation amplifier still cannot meet ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/16
CPCG01D5/16
Inventor 秦小虎刘亚蒙黄畅悦万成
Owner CHONGQING KAIJIN TECH CO LTD
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