A Segmented Mutual Capacitance Displacement Sensor for Roof Delamination Monitoring

A displacement sensor, top plate separation technology, applied in the direction of using electrical devices, electromagnetic means, instruments, etc., can solve the problems of increasing absolute measurement error and large sensor size, and achieve the effect of reducing requirements and simplifying the production process
CN103267474BActive Publication Date: 2016-08-10SHANXI COAL TRANSPORTATION & SALES GRP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI COAL TRANSPORTATION & SALES GRP
Publication Date
2016-08-10

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Abstract

The invention discloses a subsection mutual capacitance displacement sensor for monitoring top plate roof separation. The subsection mutual capacitance displacement sensor comprises 2-50 fixed pole plates, a sliding plate and a capacitance measuring circuit. The fixed pole plates are of a subsection electric conduction unit structure. The subsection electric conduction unit comprises receiving electrodes and emission electrodes. The receiving electrodes are mutually independent. The emission electrodes are connected together. Consequently, an overall emission electrode of the fixing pole plates is formed. The overall emission electrode and the receiving electrodes are connected with the capacitance measuring circuit. The sliding pole plate covers the subsection conducting unit and is connected with a measuring rope of deep base points and shallow base points. According to the subsection mutual capacitance displacement sensor, the fixed pole plates are of the subsection conducting unit structure, the overall length of the fixed pole plates is equal to the length to be detected plus the length of the sliding pole plate and is far less than two times of an existing length to be detected, moreover, the absolute measuring error is less the largest error when the sliding pole plate is measured with a subsection electric conduction unit unit.
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Description

technical field

[0001] The invention belongs to the technical field of roof detachment monitoring of underground roadways in coal-measure strata mines, and in particular relates to a segmented mutual capacitance displacement sensor used for roof detachment monitoring. Background technique

[0002] At present, the sensors involved in the monitoring of the surrounding rock separation layer of the mine underground roadway in the coal-measure strata are mainly displacement sensors. According to the monitoring principle, the displacement sensors can be divided into resistive displacement sensors, capacitive displacement sensors, inductive displacement sensors, gratings, and magnetic gratings. , Capacitive grid displacement sensor and magnetostrictive displacement sensor and so on. Among them, the most studied are: 1) Resistive displacement sensor. The sensor has the characteristics of simple structure and convenient collection; 2) Photoelectric, magnetoelectric pulse coded displ...

Claims

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