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Self-adaptive phase alignment module and method and vibration type gyroscope measurement and control circuit

A phase alignment and adaptive technology, applied in the inertial field, achieves the effects of high adaptive phase alignment, high accuracy, and strong robustness

Active Publication Date: 2020-07-21
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present disclosure provides an adaptive phase alignment module and method, and a vibrating gyroscope measurement and control circuit to at least partially solve the above technical problems

Method used

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  • Self-adaptive phase alignment module and method and vibration type gyroscope measurement and control circuit
  • Self-adaptive phase alignment module and method and vibration type gyroscope measurement and control circuit
  • Self-adaptive phase alignment module and method and vibration type gyroscope measurement and control circuit

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no. 1 example

[0055] In a first exemplary embodiment of the present disclosure, an adaptive phase alignment module is provided.

[0056] figure 1 It is a schematic structural diagram of an adaptive phase alignment module according to the first embodiment of the present disclosure.

[0057] refer to figure 1 As shown, the adaptive phase alignment module 1 of the present disclosure includes an adaptive phase alignment loop, and the adaptive phase alignment loop includes: an adjustable phase shifting module 11, which is used to adjust the input The phase-shifting operation is performed on the first signal; the phase-locking module 12 is used to perform phase-locking filtering on the specific information in the first signal after the adjustable phase-shifting module 11 performs the first phase-shifting operation; and a phase detector 13 is used for Phase comparison is performed between the specific information after the phase-locking filter processing by the phase-locking module 12 and the se...

no. 2 example

[0071] In a second exemplary embodiment of the present disclosure, an adaptive phase alignment method is provided.

[0072] figure 2 It is a flowchart of an adaptive phase alignment method according to the second embodiment of the present disclosure.

[0073] refer to figure 2 As shown, the adaptive phase alignment method of the present disclosure includes:

[0074] Step S21: performing a first phase-shifting operation on the input first signal according to the information of the control terminal;

[0075] In this embodiment, the first signal is a differential detection signal of the vibratory gyroscope, and the differential detection signal includes Coriolis displacement, quadrature error, noise, and the like.

[0076] In other embodiments, the first signal may also be a single-ended detection signal, and the single-ended detection signal includes Coriolis shift, quadrature error, noise, and the like.

[0077] In some embodiments, the first signal is converted into a volt...

no. 3 example

[0093] In a third exemplary embodiment of the present disclosure, a vibrating gyroscope measurement and control circuit is provided.

[0094] image 3 It is a schematic structural diagram of a vibrating gyroscope measurement and control circuit according to a third embodiment of the present disclosure.

[0095] refer to image 3 As shown, the vibrating gyroscope measurement and control circuit of the present disclosure includes: a detection path, which includes any adaptive phase alignment module mentioned in the present disclosure.

[0096] In some embodiments of the present disclosure, in the vibrating gyroscope measurement and control circuit, the detection path is an open loop or a closed loop. In this embodiment, an open-loop detection path is used as an example.

[0097] In some embodiments of the present disclosure, the main channel of the detection path also includes a mixer 16, and the phase-shifted differential detection signal output by the adjustable phase-shift...

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Abstract

The invention discloses a self-adaptive phase alignment module, a self-adaptive phase alignment method and a vibration type gyroscope measurement and control circuit. The self-adaptive phase alignmentmodule comprises a self-adaptive phase alignment loop. The self-adaptive phase alignment loop comprises an adjustable phase shift module used for carrying out phase shift operation on an input firstsignal according to information of a control end, a phase-locked module used for carrying out phase-locked filtering on specific information in the first signal subjected to the first phase shift operation by the adjustable phase shift module, and a phase discriminator used for carrying out phase comparison on the specific information subjected to phase-locked filtering by the phase-locked moduleand a second signal to obtain phase difference information, wherein the phase difference information or equivalent information of the phase difference information controls self-adaptive feedback adjustment and locking of the first phase shift operation, and phase alignment of the specific information and the second signal is realized during locking. The module reduces the phase jitter of specificinformation, achieves the high-precision and high-accuracy self-adaptive phase alignment, and is higher in robustness.

Description

technical field [0001] The disclosure belongs to the technical field of inertia, and relates to an adaptive phase alignment module and method, and a vibrating gyroscope measurement and control circuit. Background technique [0002] Compared with traditional gyroscopes, silicon MEMS gyroscopes have significant advantages such as low cost, low power consumption, small size, light weight and high reliability, and have been widely used in consumer electronics, automotive and industrial control fields. With the deepening of research in recent years, the performance of MEMS gyroscopes has gradually approached the inertial navigation level, and it has begun to be used in cutting-edge fields such as inertial navigation. [0003] Usually MEMS gyroscopes are vibrating gyroscopes, which sense angular velocity based on the Coriolis effect. If the gyroscope is driven to a stable oscillation on the X-axis, if a rotational angular velocity is input on the Z-axis at this time, a Coriolis d...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 陈华钟燕清范玉宝
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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