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Electrochemical Microseismometer

An electrochemical and wave detector technology, applied in the field of sensors, can solve the problems of system instability and DC drift of output signals, and achieve the effect of expanding the working range, reducing the complexity and being convenient to carry.

Active Publication Date: 2019-07-05
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using this method to expand the frequency band will cause system instability, and the output signal will produce DC drift. After the compensation circuit, a high-order band-pass filter is required to filter the output to ensure its output stability, but it cannot fundamentally Solve the problem of drift

Method used

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Embodiment Construction

[0051] The present invention proposes a force balance negative feedback mechanism suitable for small-scale MEMS electrochemical microseismic detectors based on the MEMS electrochemical microseismic detector, through the combination of signal processing circuit and mechanical structure, and using the control system principle , in order to achieve the purpose of expanding the working frequency band of the small MEMS electrochemical microseismic detector.

[0052] In an exemplary embodiment of the present invention, an electrochemical microseismometer is provided. figure 1 It is a schematic structural diagram of an electrochemical microseismometer according to an embodiment of the present invention. Such as figure 1 As shown, the microseismic detector of the present embodiment comprises:

[0053] base 10;

[0054] The inertial pendulum 20 is supported on the base 10, and an electrolyte space A is formed therein, and electrolyte is filled in the electrolyte space;

[0055] Sen...

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Abstract

The invention provides an electrochemistry microseism wave detector comprising an inertial pendulum body, a sensitive electrode, a signal processing circuit and a feedback assembly, wherein an electrolyte space is formed in the inertial pendulum body and is filled with an electrolyte, the sensitive electrode is fixed in the electrolyte in the electrolyte space, vibration signals are converted into electric signals via adoption of a electrochemistry principles, an input end of the signal processing circuit is electrically connected to the sensitive electrode and is used for processing electric signals output via the sensitive electrode, and therefore negative feedback signals can be obtained; an input end of the feedback assembly is electrically connected to the signal processing circuit and is used for applying force opposite to external vibration input force on the inertial pendulum body via use of the negative feedback signals, and therefore displacement of the inertial pendulum body caused by the external vibration input force can be reduced. According to the electrochemistry microseism wave detector, a work frequency band of a small-sized MEMS electrochemistry microseism wave detector can be expanded via a force balance negative feedback mechanism suitable for the small-sized MEMS electrochemistry microseism wave detector.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an electrochemical microseismic detector based on MEMS and force balance feedback technology. Background technique [0002] Microseismic geophones refer to sensors that can detect ground vibration signals, which can convert very small seismic signals that cannot be directly measured (such as physical quantities such as tiny displacements, microvelocities, and microaccelerations) into measurable signal forms (such as voltage signals , current signals, etc.), microseismic detectors play an irreplaceable role in the field of seismic monitoring and geophysical exploration. [0003] After the seismic signal is transmitted from the source to the ground, the energy of the seismic wave is mostly concentrated at the low frequency end and the amplitude is very small, so there is a high demand for the low frequency sensitivity and low frequency bandwidth of the microseismic detector. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/18
CPCG01V1/181G01V2210/144
Inventor 王军波李光磊陈德勇陈健孙振源陈连宏
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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