Electromagnetic balanced type force sensor based on optical lever and electronic balance

Abstract

The invention provides an electromagnetic balanced type force sensor based on an optical lever, and an electronic balance. The sensor comprises the optical lever, a PSD element, an electromagnetic coil and a closed-loop detection system; the optical lever is used for producing a beam, and reflecting the beam to the PSD element; the PSD element is used for detecting displacement of an optical leverreflecting light spot; the PSD element is connected with the closed-loop detection system, and the closed-loop detection system is connected with an electromagnetic coil. A photoelectric system for displacement detection of the existing electronic analysis balance is skillfully replaced with a displacement detection system composed of the optical lever and the PSD element; the optical lever technology, the PSD element and the electromagnetic force sensor are integrated so as to further improve the detection sensitivity of the existing electronic analysis balance.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to an optical lever-based electromagnetic balance force sensor and an electronic balance. Background technique [0002] Electronic balance integrates sensing technology, analog electronic technology, digital electronic technology, computer technology, intelligent information processing technology, materials and precision manufacturing technology. It is also a comprehensive product of many technological developments. Compared with mechanical balances, it has fast weighing, Easy to operate, automatic calibration, fault self-diagnosis and other functions and advantages. Once the electronic balance came out, it quickly entered the field of measurement and weighing, and became a necessary testing instrument in the fields of scientific research, production, military industry, and medicine. [0003] According to its accuracy, electronic balances can be divided into ultra-micro electronic balances (...

AI Technical Summary

Problems solved by technology

In recent years, China has focused on solving the problems of signal processing, temperature drift compensation, magnetic steel performance stability and feedback control in the research of electronic balances in China, which has significantly improved the development level of my country's electronic analytical balances, making my country's electronic balances with an accuracy of 1 / 10,000 The development is close to the world's leading level, but due to the limitations of materials and precision manufacturing processes, the consistency and reliability of my country's electronic balances are still far behind the international advanced level of instrument performance, and there are still many technologies that need to be further studied and further improved

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