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Angular velocity measurement device and method, and carrier

A measurement device and measurement method technology, applied in the measurement field to achieve the effect of rapid measurement

Active Publication Date: 2019-04-02
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

But the above-mentioned laser Sagnac interferometer can only measure the relative angular velocity

Method used

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  • Angular velocity measurement device and method, and carrier
  • Angular velocity measurement device and method, and carrier
  • Angular velocity measurement device and method, and carrier

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Embodiment approach

[0066] Preferably, in an embodiment of the present invention, the voltage signal generated by the high-bandwidth detector first passes through a low-pass filter whose bandwidth is half of the repetition frequency, and then is collected by a high-speed data collector, which can remove the In the non-coherent part, the continuous interference signal 401 is obtained directly, and the sampling period of the high-speed data collector can also be set arbitrarily.

[0067] In another embodiment of the present invention, the high-speed data collector directly collects the voltage signal generated by the high-bandwidth detector. At this time, the sampling period of the high-speed data collector is the repetition frequency of the local oscillator optical comb signal 201, and by adjusting phase to maximize the sampling signal-to-noise ratio.

[0068] The optical frequency comb signal is represented as a femtosecond-level carrier envelope pulse in the time domain, and the signal optical f...

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Abstract

The invention discloses an angular velocity measurement device and method, and a carrier. After a measurement optical comb signal is divided into a first optical comb signal and a second optical combsignal which are oppositely transmitted in a measurement loop through a first optical splitter, the first optical comb signal and the second optical comb signal are combined on the first optical splitter and a combined optical comb signal is output; the combined optical comb signal and a local oscillator optical comb signal generate multi-heterodyne interference and an interference signal is output; when the measurement loop rotates, the first optical comb signal and the second optical comb signal generate a Sagnac effect on the first light splitter, and the interference signal is analyzed through multi-heterodyne interference with the local oscillator optical comb signal, so that the absolute angular velocity of the rotation of the measurement loop can be obtained. According to the embodiments, the absolute angular velocity can be measured accurately and rapidly by only one single-point detector.

Description

technical field [0001] The invention relates to the field of measurement, in particular to an angular velocity measurement device, method and carrier thereof. Background technique [0002] The Sagnac interferometer using the Sagnac effect (Sagnac effect) is a high-precision interferometer, and the Sagnac interferometer is used to measure relative angular velocity. [0003] The characteristic of the Sagnac interferometer is that the laser beam is divided into two beams of reflection and transmission, propagates along the closed optical path in opposite directions, and finally converges to the beam splitter and returns to the detector. When the closed optical path rotates around an axis perpendicular to the plane of the closed optical path in the inertial space, there will be an optical path difference between the two columns of light waves propagating oppositely in the optical path due to the inertial motion of the light waves, resulting in two beams of coherent light waves ...

Claims

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Application Information

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IPC IPC(8): G01C19/72
CPCG01C19/723
Inventor 倪凯马茹玉余浩洋周倩吴冠豪李星辉王晓浩
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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