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Micro-displacement sensor

A technology of displacement sensor and reed switch sensor, applied in the field of sensors, can solve the problems of large error, short service life, low sensitivity, etc., and achieve the effects of low cost, long service life and improved sensitivity

Inactive Publication Date: 2013-03-27
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

The sensor slide rail is connected to a steady-state DC voltage, allowing a small current of microamperes to flow. The voltage between the slide and the starting end is proportional to the length of the slide. By generating a voltage change signal, the magnitude of the displacement is verified. After the sensor is used for a long time, there will be a gap between the slide plate and the slide rail, and the signal generated by the sensor will have low sensitivity, large error, and short service life.

Method used

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Embodiment Construction

[0016] figure 1 The shown micro-displacement sensor is composed of a displacement transmission mechanism 1, an acceleration mechanism 2, and a pulse generating device 3, and the displacement transmission mechanism 1 and the acceleration mechanism 2 are mechanically transmitted; the pulse signal generator device 3 is composed of a rotor 6 and a stator 5 , the rotor 6 and the stator 5 are respectively provided with a magnetic block 7 and a reed switch 8 interacting with each other, the rotor 6 is installed on the output shaft 13 of the transmission mechanism 2, the reed switch 8 is installed on the stator 5, and the reed switch 8 The two contacts are connected to the pulse counter. The displacement transmission mechanism 1 is wound with a steel wire rope on a round wheel. The round wheel is installed on the input shaft 4 of the acceleration mechanism 2. When the wire rope moves linearly, the input shaft rotates, so that the linear displacement becomes amount of rotation. Speed-...

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Abstract

The invention discloses a micro-displacement sensor which comprises a displacement transmission mechanism, an acceleration mechanism and a pulse signal generation device. A steel wire rope is wound on a disc wheel to form the displacement transmission mechanism, and the disc wheel is mounted on an input shaft of the acceleration mechanism, and the steel wire rope is drawn to convert linear displacement motion into rotation of the acceleration mechanism; the acceleration mechanism comprises the input shaft, a multi-stage speed changing gear and an output shaft; and the pulse signal generation device comprises a rotor and a stator, magnetic blocks and reed switches are respectively arranged on the rotor and the stator and interact with one another, the rotor is mounted on the output shaft of the acceleration mechanism, the reed switches are mounted on the stator, and two contact points of each reed switch are connected onto a pulse counter. The rotor rotates during displacement, so that the reed switches generate pulse signals, and the displacement is computed according to pulse data.

Description

technical field [0001] This application relates to the field of sensors. Background technique [0002] At present, in many industrial fields, it is necessary to measure displacement. For example: for the measurement of the displacement of the roof in the coal mine, the displacement measurement generally uses a sensor made of a potentiometer. value. The sensor slide rail is connected to a steady-state DC voltage, allowing a small current of microamperes to flow. The voltage between the slide and the starting end is proportional to the length of the slide. By generating a voltage change signal, the magnitude of the displacement is verified. After the sensor is used for a long time, there will be a gap between the slide plate and the slide rail, and the signal generated by the sensor will have low sensitivity, large error, and short service life. Contents of the invention [0003] In order to overcome the deficiency of the potentiometer type displacement micro sensor, the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
Inventor 孙克孙伟方亓涛郭晓冬任志舶王晓达
Owner SHANDONG UNIV OF SCI & TECH
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