A digital differential tension sensor based on a linear array CCD and a tension detection method using the sensor

Abstract

The invention relates to a digital differential tension sensor based on a linear array CCD and a tension detection method using the sensor. The sensor includes a suspension beam made from elastic material. The inner end of the suspension beam is fixed. The middle of the right side and the middle of the back side of the suspension beam are each provided with a mirror reflection region. The outer end of the suspension beam is a free force bearing end. A first laser emitter and a second laser emitter are symmetrically arranged above and below the inner end of the suspension beam. Optical paths ofthe two laser emitters are inclined and face the mirror reflection regions. A first linear array CCD element and a second linear array CCD element that can sense laser reflected light are symmetrically arranged above and below the outer end of the suspension beam. Signal output ends of the two linear array CCD elements are electrically connected with a control circuit. Through differential calculation, the detection method obtains a relationship between tension and pixel offset of the linear array CCD elements to obtain the tension. The digital differential tension sensor is simple in structure and is high in detection precision, linearity and sensitivity, is convenient and reliable, and realizes digital measurement of micro-tension.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a digital differential tension sensor based on a linear array CCD and a tension detection method using the sensor. Background technique [0002] Tension sensors mainly include strain type, piezoresistive type and piezoelectric type, etc. The sensitive elements of these sensors are in direct contact with mechanical elastic elements, and their ability to resist transient impact is weak, and the sensor is often damaged due to overload, which reduces the sensor's performance. service life. The tension sensor data is read as an analog signal, and then converted into a digital signal by a digital-to-analog converter, which makes the measurement cumbersome and increases the cost. [0003] Light and magnetism are commonly used as measurement media in non-contact measurement technology, and photosensitive devices and magnetic sensitive devices are used for detection components. In order ...

AI Technical Summary

Problems solved by technology

[0002] Tension sensors mainly include strain type, piezoresistive type and piezoelectric type, etc. The sensitive elements of these sensors are in direct contact with the mechanical elastic elements, and their ability to resist transient impact is weak, and the sensor is often damaged due to overload, which reduces the sensor's performance. service life

The tension sensor data is read as an analog signal, and then converted into a digital signal by a digital-to-analog converter, which makes the measurement cumbersome and increases the cost

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