Dual Y-type cavity dual frequency laser accelerometer

An accelerometer and dual-frequency laser technology, applied in directions such as acceleration measurement using inertial force

Inactive Publication Date: 2010-05-05
龙兴武 +2
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Generally speaking, the above schemes have their own characteristics, but due to their inherent shortcomings in principle...

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  • Dual Y-type cavity dual frequency laser accelerometer
  • Dual Y-type cavity dual frequency laser accelerometer
  • Dual Y-type cavity dual frequency laser accelerometer

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Embodiment Construction

[0046] An implementation example of the present invention will be described in detail below in conjunction with the accompanying drawings. But it should not limit the protection scope of the present invention.

[0047] Such as Figure 5 As shown, the dual-Y-cavity dual-frequency laser accelerometer is composed of an optical module 18 , a working point selection and control module 17 , and a signal acquisition and processing module 16 . Among them, the working point selection and control module 17 is used to select and control the working point of the accelerometer, and adopts the method of light intensity difference to stabilize the frequency of the dual-frequency laser; the signal acquisition and processing module 16 is used to receive two Y-cavity dual-frequency lasers The output beat frequency signal of the accelerometer system is the final output signal after calculating the difference between the two beat frequencies; the optical module 18 is the core of the whole system...

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Abstract

A dual Y-type cavity dual frequency laser accelerometer belongs to the technical field of laser and precise measurement. The dual Y-type cavity dual frequency laser accelerometer comprises an optical module, a working point selecting and controlling module, a signal collecting and processing module and the like. The optical module consists of two symmetrical Y-type cavity dual frequency lasers and a gaseous film box. The gaseous film box is used as a primary acceleration sensitive element to convert the input acceleration into refractive index variation of sensitive gas in the gaseous film box, so as to be converted into beat frequency output of the Y-type cavity dual frequency lasers, and then the dual Y-type cavity structure is used for differentiating the beat frequency of the two Y-type cavity dual frequency lasers to obtain the final output signal. The working point selecting and controlling module is used for selecting and controlling the working point of the accelerometer to stabilize the frequencies of the dual frequency lasers by adopting a method of light intensity difference. The signal collecting and processing module is used for receiving the output beat frequencies of the two Y-type cavity dual frequency lasers, and calculating the difference between the two beat frequencies to be as the final output signal of the accelerometer system. The inventive dual Y-type cavity dual frequency laser accelerometer measures the acceleration of a carrier by measuring the variation of the difference between the two beat frequencies of the two dual frequency lasers, thus having advantages of high resolution ratio, large scale factor, good linearity, digital output and the like.

Description

technical field [0001] The invention relates to a high-precision novel laser accelerometer, in particular to a gas bellows type dual-frequency laser accelerometer, which belongs to the technical field of laser and precision measurement. Background technique [0002] The accelerometer is an important component in the inertial navigation and guidance system, which converts the motion acceleration of the controlled or measured carrier along its input axis into electrical signals or other forms of signals. The development of accelerometers has gone through decades of history and there are many types. The development of modern laser technology, optical fiber sensing technology, and micro-manufacturing technology has provided favorable conditions for the research of optical accelerometers. Optical accelerometers have gradually become a hot spot in the research of accelerometers at home and abroad because of their high sensitivity and strong anti-electromagnetic interference capabi...

Claims

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Application Information

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IPC IPC(8): G01P15/03
Inventor 龙兴武肖光宗张斌
Owner 龙兴武
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