Force closed-loop large linear displacement sensor

A linear displacement, sensor technology, applied in the direction of instruments, measuring devices, etc., can solve the problems of large measurement error of the system, non-constant force phenomenon of spring tensioning system, etc.

Inactive Publication Date: 2018-10-16
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Abstract
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Problems solved by technology

However, the measurement system is an open loop; and the spring tension system has a non-constant force phenomenon in the full measurement range, and the system has a large measurement error

Method used

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  • Force closed-loop large linear displacement sensor

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] figure 1 It is a side view of the design method of the force closed-loop large linear displacement sensor according to the embodiment of the present invention. figure 2 It is a model diagram of the design...

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Abstract

The invention discloses a force closed-loop large linear displacement sensor. A wire rope is wound on a first flexible wheel, the centers of the first flexible wheel and a second flexible wheel are coincident, two light-emitting diodes are mounted on the inner side of the first flexible wheel, two photoresistors are mounted on the outer side of the second flexible wheel, two light-emitting diodesare on a straight line passing through the center of the circle, the two photoresistors are on the straight line passing through the center of the circle, the two straight lines are not coincident, aflexible spoke is located between the first flexible wheel and the second flexible wheel, the flexible spoke is S-shaped, when the wire rope is pulled, the flexible spoke is deformed, the positions ofthe photoresistors and the light-emitting diodes are relatively changed, one side of the second flexible wheel is connected to an encoder, the other side is connected to a speed reducer, and the other side of the speed reducer is connected to a stepping motor. The sensor can improve the accuracy of the displacement measurement and eliminate the limitation of the tension of a traditional open-looppulling line large displacement sensor and a measurement length.

Description

technical field [0001] The invention relates to the field of displacement measurement, in particular to a force closed-loop large linear displacement sensor. Background technique [0002] Due to its advantages of convenient installation, low price, large measuring distance, strong anti-interference ability and many other advantages, it is widely used in testing, instrument measurement, transportation, robot, hydraulic device, pneumatic device, industrial automation, motion control and other fields. widely. The traditional pull-wire displacement sensor is tensioned by an internal spring, and the displacement measurement is realized through the sensor. However, the measurement system is an open loop; and the spring tension system has a non-constant force phenomenon in the full measurement range, and the system has a large measurement error. Contents of the invention [0003] The purpose of the present invention is to provide a force closed-loop large linear displacement se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 何广平毕富国赵磊李欣王杨
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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