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Fiber-optic gyroscope based angular displacement measuring device and method

A technology of fiber optic gyroscope and measurement method, which is applied in the field of measurement, can solve the problems of poor test adaptability, etc., and achieve the effect of less measurement steps, high test accuracy and small size

Inactive Publication Date: 2012-11-14
ZHEJIANG MEASUREMENT SCI RES INST
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  • Claims
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Problems solved by technology

[0005] The above measurement methods all have the defect of poor test adaptability

Method used

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  • Fiber-optic gyroscope based angular displacement measuring device and method
  • Fiber-optic gyroscope based angular displacement measuring device and method
  • Fiber-optic gyroscope based angular displacement measuring device and method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing:

[0030] The fiber optic gyroscope is a sensor that measures angular velocity, and its output expression is:

[0031] F=KΩ+D 0 (3)

[0032] In the formula, F is the output of the fiber optic gyroscope, K is the scaling factor of the fiber optic gyroscope, Ω is the input angular velocity, D 0 is the zero bias of the fiber optic gyroscope. K and D 0 is the quantity calibrated in advance, the input angular velocity Ω can be calculated according to the output F of the fiber optic gyroscope. When the fiber optic gyroscope and the rotating device under test are fixed and the measurement axis of the fiber optic gyroscope is parallel to the rotation axis of the rotating device under test, the measured angular velocity is the angular velocity of the rotating device under test, which can be integrated Obtain the angular displacement of the rotating device under test.

[0033]...

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Abstract

The invention discloses a fiber-optic gyroscope based angular displacement measuring device and method. The fiber-optic gyroscope based angular displacement measuring device comprises a fiber-optic gyroscope and an operation processing unit which are connected with each other. The fiber-optic gyroscope based angular displacement measuring method comprises the following steps of: (1) fixing the fiber-optic gyroscope on a rotary device to be measured, and enabling a measuring axis of the fiber-optic gyroscope to be parallel to a rotation axis of the rotary device to be measured; (2) enabling the operation processing unit to receive output values of the fiber-optic gyroscope and calculate the mean value of output values within test time when the rotary device to be measured is on the static state; (3) enabling the rotary device to be measured to rotate an angle, wherein output values of the fiber-optic gyroscope are continuously recorded by the operation processing unit in the rotation process; and (4) obtaining the angular displacement of the rotary device to be measured, which is caused by rotation, through the calculation carried out by the operation processing unit according to the scale factor of the fiber-optic gyroscope, the mean value of the output values obtained in the step (2), and various output values of the fiber-optic gyroscope obtained in the step (3). The device and the method, which are disclosed by the invention, have the advantages of strong test adaptability, simple structure and high measurement precision.

Description

technical field [0001] The invention relates to measurement technology, in particular to a device and method for measuring angular displacement based on a fiber optic gyroscope. Background technique [0002] Angular displacement is the angle by which a rotating device is turned about its axis of rotation. In many occasions of industrial production, it is necessary to accurately measure the angular displacement of the rotating device. At present, the more common methods include theodolite method and encoder measurement method. [0003] The theodolite method requires a rectangular prism placed outside the rotating device as a reference, and then a rectangular prism is placed on the rotating device. Before the rotation, use the theodolite to calibrate the angle θ between the normal lines of the two prisms 1 , after the rotation, use the theodolite to calibrate the angle θ between the normals of the two prisms 2 , then θ 2 -θ 1 It is the angle that the rotating device has r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/26
Inventor 茅振华周闻青陈挺周一览金杭
Owner ZHEJIANG MEASUREMENT SCI RES INST
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