Switched mode digital displacement transducer
A digital displacement and switching technology, which is applied in the direction of instruments, measuring devices, electric/magnetic solid deformation measurement, etc., can solve the problems of high shielding requirements, difficulty in obtaining displacement sensors, and inability to obtain measurement data, so as to achieve high reliability and stability Good performance and low cost
Inactive Publication Date: 2007-07-18
TSINGHUA UNIV
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Problems solved by technology
In many displacement measurement tasks in scientific research and engineering practice, it is still difficult to obtain displacement sensors with high measurement stability, and it may even be impossible to obtain measurement data.
This is mainly because the anti-interference ability of current sensors is difficult to meet the requirements of these measurement environments
For example, potentiometers, resistance strain gauges, etc. are sensitive to temperature and humidity, and sensors with electromagnetic measurement principles such as capacitive, inductive, and magnetic grids generally have high shielding requirements. These limitations will reduce the reliability of displacement measurement.
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[0014] The basic idea of the digital switch type displacement sensor proposed by the present invention is: its displacement sensing circuit is composed of two parts, one part is a grid strip fixed on an object, and the other part is fixed on another object that generates relative displacement The movement of the object drives the sliding body (that is, the switching part) to slide on the motherboard (that is, the grid belt). Different positions of the sliding body on the motherboard will give different switching signals, so that the sliding body can be judged. The position of the object on the motherboard can be used to obtain the displacement of the detected object.
[0015] The material used for the above-mentioned grid can be a metal conductor, and the corresponding conductive material slide also uses a metal conductor; the grid can also use photoelectric materials, and the corresponding conductive material slide is replaced by a light source.
[0016] 1. The grid uses a ...
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A digital displacement transducer of switching mode consists of a lattice belt including lattices being able to conduct electricity and connecting each lattice to a power supply loop which is off at position of lattice, and a switching component moving itself on lattice in following relative displacement generated by two objects to conduce loop of lattice and outputting electrical signal from the loop. The relative displaced amount of two objects can be expressed after the electrical signal is processed.
Description
Technical field: [0001] The invention relates to a sensing device for measuring the displacement or strain of an object. The device has a strong ability to resist electromagnetic interference and temperature, humidity changes, etc., and is suitable for displacement measurement with a large range. Background technique: [0002] Currently, there are many sensing devices for measuring displacement and strain. These displacement sensing devices can be divided into analog type and digital type, mainly including potentiometer, resistance strain type, capacitive type, inductive type, eddy current type, photoelectric type, grating type, induction synchronizer type and magnetic grid type. These sensing devices are relatively mature in technology, and their products can meet the test requirements under a suitable working environment. (Huang Jichang, Xu Qiaoyu, Zhang Haigui, etc., Working Principles and Application Examples of Sensors, People's Posts and Telecommunications Press, 199...
Claims
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IPC IPC(8): G01B7/02G01B7/16
Inventor 陈轮
Owner TSINGHUA UNIV