A Displacement Sensor with Digital Frequency Output

A displacement sensor and frequency output technology, applied in the field of displacement sensors, can solve the problems of inability to connect digital systems, and achieve the effects of simple detection circuit, high quality factor, and strong anti-interference ability.

Active Publication Date: 2017-01-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that most of the displacement sensors in the prior art are analog and cannot be directly connected to the digital system, and propose a displacement sensor with digital frequency output

Method used

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  • A Displacement Sensor with Digital Frequency Output
  • A Displacement Sensor with Digital Frequency Output
  • A Displacement Sensor with Digital Frequency Output

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Embodiment Construction

[0020] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The invention provides a displacement sensor with digital frequency output, such as figure 1 As shown, it includes a detection coil 1 , a quartz crystal resonator 2 and an oscillator 4 , and the detection coil 1 , the quartz crystal resonator 2 and the oscillator 4 form a series loop.

[0022] Wherein, the detection coil 1 adopts a PCB printed coil or a solenoid type detection coil or the like. In the embodiment of the present invention, the detection coil 1 is a PCB printed coil, such as figure 2 and image 3 As shown, it includes a PCB board 11 and a printed coil 12 fabricated thereon.

[0023] The inductance of the detection coil 1 is less than 100 microhenries. In the embodiment of the present invention, the inductance of the detection coil 1 is 14 microhenries.

[0024] The quartz crystal resonator 2 is packaged in metal, and its nomina...

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PUM

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Abstract

The invention discloses a displacement sensor with digital frequency output, comprising a detection coil, a quartz crystal resonator and an oscillator. The detection coil, the quartz crystal resonator and the oscillator form a series loop. Among them, the output frequency of the displacement sensor with digital frequency output is determined by the relative displacement between the detection coil and the measured object. The sensor of the invention has good stability, simple structure, high sensitivity and digital frequency output.

Description

technical field [0001] The invention belongs to the technical field of displacement sensors, and in particular relates to the design of a displacement sensor with digital frequency output. Background technique [0002] Displacement sensors are widely used in various fields, mainly including resistance strain gauge type, grating type, capacitive type, inductive type, etc. The measurement range of the resistance strain gauge displacement sensor is 0.1-100 μm, which is only suitable for accurate measurement in a small range; the grating type displacement sensor has a large test range and high resolution, but the equipment is complicated and not easy to carry, and the optical signal is not easy to store and process; The displacement sensor has low cost and low power consumption, but its anti-interference ability is poor and it is easily affected by the environment. Moreover, most of these forms of sensor output are analog and cannot be directly connected to digital systems. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02
Inventor 陈向东丁星马文卓
Owner SOUTHWEST JIAOTONG UNIV
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