A self-powered wireless hydraulic pressure sensor based on piezoelectric technology

Abstract

The invention provides a self-powered wireless hydraulic pressure sensor based on a piezoelectric technology, which comprises a sensor body and a sensor metal head, wherein the sensor body comprises a packaged shell with a cavity; the cavity of the packaged shell is internally provided with a transition film; the transition film separates the cavity to an oil liquid cavity and an insulation cavity; the insulation cavity is internally provided with a circuit board and a piezoelectric module; the piezoelectric module is cylindrical and is transversely arranged in the insulation cavity; one end of the cylindrical piezoelectric module is tightly attached to the transition film; the oil liquid cavity is internally provided with a filter element; a damping hole is arranged in the sensor metal head; the damping hole is communicated with the cavity of the packaged shell through the filter element; the circuit board is provided with an energy management module, a signal processing module and a wireless transmission module; and the piezoelectric module comprises a pressure sensor unit and a piezoelectric energy harvester unit. The self-powered wireless hydraulic pressure sensor based on the piezoelectric technology is applicable to the pressure sensor field, no signal line is required for signal transmission, and no power line is required for power supply.

Description

technical field [0001] The invention relates to the technical field of hydraulic pressure sensors, in particular to a self-powered wireless hydraulic pressure sensor based on piezoelectric technology. Background technique [0002] With the development of coal mining technology, hydraulic supports are widely used. In the production process of the fully mechanized mining face, the hydraulic support is prone to failures such as automatic lowering, dead support, and inverted support. This requires real-time monitoring of changes in the liquid pressure of the hydraulic cylinder to understand the interaction between the hydraulic support and the roof. Determine if the stand is in good working order. Therefore, hydraulic pressure sensors play an important role in ensuring production safety. [0003] At the same time, due to the continuous movement and changes of the mining face during the production process, this increases the complexity of wired transmission cable wiring, and th...

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Problems solved by technology

[0003] At the same time, due to the continuous movement and changes of the mining face during the production process, this increases the complexity of wired transmission cable wiring, and the existence of wired cables limits the range of motion of the hydraulic support, causing cable damage and The phenomenon of tearing often occurs, which brings many safety hazards to coal mining work

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