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Detection device for MHD angular-rate sensor

An angular rate sensor and detection circuit technology, which is applied to devices using fluids, devices using electrical/magnetic methods, and measuring devices, etc., can solve the problem that the output signal of the sensitive element of the MHD angular rate sensor is weak and the detection circuit has high detection accuracy. , low noise level, etc., to achieve the effect of obvious bandwidth expansion, saving operational amplifiers, and reducing noise level

Active Publication Date: 2016-04-13
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

The output signal of the sensitive element of the MHD angular rate sensor is very weak, and there is low-frequency attenuation. The conventional detection circuit cannot meet the requirements of high detection accuracy, low noise level and wide working bandwidth at the same time.

Method used

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  • Detection device for MHD angular-rate sensor
  • Detection device for MHD angular-rate sensor
  • Detection device for MHD angular-rate sensor

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0032] The MHD angular rate sensor detection circuit involved in the present invention includes functional modules such as a differential amplification module (4), a bandwidth expansion module (5), and a band-pass filter module (6).

[0033] The inductance coil (2) in the sensor sensitive element (1) produces a voltage signal V proportional to the angular rate in1 , V in2 , detection circuit (3) for V in1 , V in2 After corresponding processing, the output signal V of the whole machine of the sensor is obtained o . Since V in1 , V in2 It has the characteristics that the differential mode component is much smaller than the common mode component, and the differential amplification mode is more suitable for V in1 , V in2 Therefore, the differential amplifier module (4) is used as the first stage of the detection circuit (3). In order to obt...

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Abstract

The invention relates to a detection circuit for a magnet-hydro-dynamics (MHD) angular-rate sensor. The detection circuit is formed by function modules: a differential amplification module, a bandwidth expansion module and a band-pass filtering module and the like, and can control noise level of the sensor effectively, improve weak signal detection capability and expand work bandwidth. Besides, the detection circuit can achieve the effect of suppressing zero position bias and zero position temperature drift of the sensor under the condition of not adding a special zero position bias adjusting module and a zero position temperature drift compensation module.

Description

technical field [0001] The invention relates to a detection device for an MHD angular rate sensor, belonging to the technical field of test and measurement. Background technique [0002] Magnetic hydrodynamic effect angular rate sensor (Magnet-Hydro-Dynamics, hereinafter referred to as MHD angular rate sensor) has the advantages of high precision, high bandwidth, high reliability, etc., and can be applied to optical path alignment equipment, imaging system motion measurement compensation system, Spacecraft load platform stability and vibration characteristics monitoring, etc. [0003] The working principle of the MHD angular rate sensor is based on the magnetohydrodynamic effect and electromagnetic induction. The sensor is mainly composed of two parts: a sensitive element and a detection circuit. When an angular rate signal around the sensitive axis of the sensor acts on the sensor, the fluid inside the sensor maintains the original motion state due to the inertial characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/46G01P3/26G01P21/02
CPCG01P3/26G01P3/46G01P21/02
Inventor 廉杰张瀚金小锋刘海涛邹江波孙延东
Owner BEIJING RES INST OF TELEMETRY
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