Digital closed loop servo circuit applied to quartz flexible accelerometer

An accelerometer and flexible technology, applied in the direction of measuring acceleration, speed/acceleration/impact measurement, measuring devices, etc., can solve problems such as loss of precision, achieve good system errors, eliminate errors, and achieve compensation effects

Inactive Publication Date: 2009-12-02
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The invention provides a digital closed-loop servo circuit of a quartz flexible accelerometer to overcome the pro

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  • Digital closed loop servo circuit applied to quartz flexible accelerometer
  • Digital closed loop servo circuit applied to quartz flexible accelerometer
  • Digital closed loop servo circuit applied to quartz flexible accelerometer

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] refer to Figure 5 The digital closed-loop servo circuit of the quartz flexible accelerometer of the present invention includes a differential capacitance detection circuit, a pre-filter amplifier circuit, an A / D conversion circuit, a digital signal processing circuit, a triangular wave generation circuit, a D / A conversion circuit, and a drive amplifier circuit . Among them, the model parameters and detailed schematic diagrams of the pre-filter amplifier circuit, A / D conversion circuit, triangular wave generation circuit, D / A conversion circuit, and drive amplifier circuit are shown in Figure 7 As shown, the detailed schematic diagram of the differential capacitance detection circuit is shown in Figure 4 As shown, the signal processing flow chart of the digital signal processing circuit is as follows Ima...

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Abstract

The invention relates to a digital closed loop servo circuit applied to a quartz flexible accelerometer, which comprises a differential capacitor detection circuit, a triangular wave generating circuit, a pre-filtering amplifying circuit, an A/D conversion circuit, a D/A conversion circuit, a drive amplifying circuit and a digital signal processing circuit, wherein the triangular wave generating circuit is connected with the input end of the differential capacitor detection circuit, the differential capacitor detection circuit is connected with a differential capacitor of a meter mechanical part of the quartz flexible accelerometer, the differential capacitor detection circuit is connected with the pre-filtering amplifying circuit, the pre-filtering amplifying circuit is connected with the A/D conversion circuit, the digital signal processing circuit is connected with the A/D conversion circuit, the digital quantity output by the digital signal processing circuit is connected with a navigation computer through an output end and is connected with the D/A conversion circuit through the output end at the same time, the D/A conversion circuit is connected with the drive amplifying circuit, and a current signal output by the drive amplifying circuit is connected with a torque coil of the meter mechanical part of the quartz flexible accelerometer through the output end of the drive amplifying circuit.

Description

Technical field: [0001] The invention relates to a digital closed-loop servo circuit of a quartz flexible accelerometer used for measuring carrier acceleration, which belongs to the technical field of detection circuits. Background technique: [0002] At present, the quartz flexible accelerometer is composed of two parts: the mechanical part of the meter head and the analog servo circuit part. The mechanical part of the meter head is composed of a torque coil, a quartz pendulum, and an upper and lower torque device; and the analog servo circuit part is composed of a differential capacitance detection circuit. , an integrating circuit, and a transconductance compensation amplifier circuit. Among them, when there is an acceleration input, the quartz pendulum deviates from the equilibrium position, so the differential capacitance value of the mechanical part of the meter head changes. The differential capacitance detection circuit in the analog servo circuit converts the diffe...

Claims

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Application Information

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IPC IPC(8): G01P15/125
Inventor 张春熹李琳张晞李立京许文渊董全林周海涛
Owner BEIHANG UNIV
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