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Isotropy equilibrium acceleration sensor

An acceleration sensor, non-directional technology, used in the field of sensors

Inactive Publication Date: 2012-11-28
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] In view of this, the main purpose of the present invention is to provide a non-directional force balance acceleration sensor, to solve the generality of the force balance acceleration sensor in vibration measurement, to realize The purpose of measuring low-frequency vibration signals in different directions with a single sensor is to further expand the frequency measurement range of the acceleration sensor and improve measurement accuracy

Method used

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Embodiment Construction

[0061] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0062] figure 2 It is a schematic diagram of the circuit and signal processing principle of the non-directional force balance acceleration sensor of the embodiment of the present invention, as figure 2 As shown, the circuit includes an RC bridge oscillation circuit, an excitation signal application circuit, a detection circuit, a high-pass filter circuit and an output amplification circuit; wherein, the excitation signal application circuit includes an upper plate excitation signal circuit, a lower plate excitation The signal circuit and the middle plate output signal circuit. in:

[0063] 1) An RC bridge oscillation circuit, used to provide an AC excitation signal for the upper plate and the lower plate of the acceleration sensor. Since the upper and lower plates of the capacitor must apply an AC e...

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Abstract

The invention relates to a nondirectional force-balance acceleration transducer which comprises a circuit part and a mechanical part, wherein the circuit part comprises an RC bridge-type oscillating circuit, an actuating signal application circuit, a detection circuit, a high-pass filtering circuit and an output amplification circuit; and the mechanical part is a base of the transducer and comprises a magnetizer, a magnetic conduction cap, a zero rack, a coil, a variation capacitor, a reed and other parts and relevant accessories. The nondirectional force-balance acceleration transducer can overcome the disadvantages of direction selectivity of the prior force-balance acceleration transducer in vibrating mensuration, and improves the measuring range and measuring precision.

Description

technical field [0001] The invention relates to sensor technology in the field of middle and low frequency vibration (vibration) and structural vibration testing, in particular to a non-directional force balance acceleration sensor. Background technique [0002] The acceleration sensor is a test instrument used to convert the physical signal of acceleration into an electrical signal that is easy to measure. It is often used in many fields such as industry and national defense to measure shock and vibration. Sensors using this design principle have been widely used in the field of vibration signal measurement. This type of sensor is especially suitable for vibration measurement in the fields of earthquake, construction, military, transportation, machinery, and navigation. [0003] The force balance acceleration sensor is a relatively mature acceleration sensor product at present. Its basic features are: by means of excitation signal modulation and demodulation, the voltage si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/125G01H11/06
Inventor 李彩华李小军
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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