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Piezoelectric vibration sensor

A vibration sensor and sensor technology, applied in the sensor field, can solve the problems of low space utilization, low efficiency, low degree of automation, etc., and achieve the effects of reducing space occupancy, expanding the scope of use, and improving production efficiency

Pending Publication Date: 2019-01-25
SUZHOU ACCROBALANCE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common piezoelectric acceleration sensor generally includes a concave lower housing, a concave upper housing, and a mounting mechanism placed between the upper housing and the lower housing. The mounting mechanism is used to fix the piezoelectric For ceramics and circuit boards, the space utilization rate of the above structure is low, the product is large in size, inconvenient to use, and it needs to be produced and assembled one by one during production, with low degree of automation and low efficiency

Method used

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  • Piezoelectric vibration sensor
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  • Piezoelectric vibration sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] See Figure 1 ~ Figure 3 , a piezoelectric vibration sensor, comprising an upper cover structure, a positioning plate 1, a lower cover structure, a piezoelectric element 2 and a circuit mechanism 3, the positioning plate 1 includes a positioning plate body 11 and is arranged on the positioning The positioning through hole 12 on the plate body 11, the upper cover plate structure includes the upper cover plate body and the first chamber surrounded by the upper cover plate body, and the lower cover plate structure includes the lower cover plate The plate body and the second chamber surrounded by the lower cover plate body, the upper cover plate structure, the positioning plate 1 and the lower cover plate structure are arranged in sequence, the first chamber, the positioning through hole 12 and the second The two chambers are connected to form a cavity, and the positioning plate body 11 is also provided with a channel 13 , one end of the channel 13 communicates with the cav...

Embodiment 2

[0028]The difference between the second embodiment and the first embodiment is that the sensor further includes one or two mass blocks 8 , and the mass blocks 8 are arranged at the movable end of the piezoelectric element 2 . When the sensor is provided with a mass block 8, the mass block 8 can be arranged on the upper surface or the lower surface of the movable end of the piezoelectric element 2, such as Figure 5 As shown, the mass 8 is arranged on the upper surface of the movable end of the piezoelectric element 2 . When the sensor is provided with two masses 8 , one mass 8 is arranged on the upper surface of the piezoelectric element 2 , and the other mass 8 is arranged on the lower surface of the piezoelectric element 2 . Setting the mass block 8 can improve the sensitivity of the sensor.

[0029] The above-mentioned sensors are all plate-shaped stacked structures. When producing the first plate body 41, the second plate body 42, the third plate body 51, the fourth plate...

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PUM

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Abstract

The invention discloses a piezoelectric vibration sensor, which comprises an upper cover plate structure, a positioning plate, a lower cover plate structure, a piezoelectric element and a circuit mechanism, wherein the upper cover plate structure, the positioning plate and the lower cover plate structure are sequentially arranged, and form a cavity therein; a channel is formed in a plate body of the positioning plate, one end of the channel is communicated with the cavity, and the other end is communicated with the environment; one end of the piezoelectric element is arranged in the channel, and the other end is arranged in the cavity; the circuit mechanism is arranged on the plate body of the positioning plate and located in a first chamber; and the piezoelectric element leads out an upper electrode and a lower electrode, and is accessed to the circuit mechanism. The piezoelectric vibration sensor adopts a stacked structure, the piezoelectric element is embedded in the cavity of the cover plates, the product space occupation rate is reduce, the size is small, the application range is expanded, the design of the stacked structure enables batch processing during production or enables large-scale automatic production, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a piezoelectric vibration sensor. Background technique [0002] The vibration sensor is one of the key components in the testing technology. Its main function is to receive the mechanical quantity and convert it into a proportional electric quantity. Since it is also an electromechanical conversion device, we sometimes call it a transducer, a vibration pickup, etc. The vibration sensor takes the original mechanical quantity to be measured as the input quantity of the vibration sensor, and then receives it by the mechanical receiving part to form another mechanical quantity suitable for transformation, and finally converts it into electricity by the electromechanical transformation part. [0003] Vibration sensors mainly include piezoelectric acceleration sensors, piezoresistive acceleration sensors, variable capacitance acceleration sensors, etc., among which piezoelectric acceleration se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/08
CPCG01H11/08
Inventor 钱平
Owner SUZHOU ACCROBALANCE ELECTRONICS CO LTD