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A circular cake type free-field pressure sensor with integral structure

A pressure sensor and overall structure technology, applied in the direction of fluid pressure measurement using piezoelectric devices, can solve problems such as sensitivity nonlinearity, and achieve the effects of high sensitivity, enhanced pressure sensitivity, and good structural impact resistance.

Active Publication Date: 2019-04-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0008] (3) Non-linear sensitivity, such as ≤1%;

Method used

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  • A circular cake type free-field pressure sensor with integral structure
  • A circular cake type free-field pressure sensor with integral structure
  • A circular cake type free-field pressure sensor with integral structure

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Embodiment Construction

[0041] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0042] The present invention provides a round cake type free-field pressure sensor with integral structure, see attached figure 1 , 2 , including: diversion structure 1, positioning cylinder 2, elastic element 3, core electrode 4, piezoelectric element 5, pressure-bearing copper electrode 6, insulating positioning sleeve 7, signal line 8, O-shaped rubber ring 9, connector 10 and Cable connection seat 11;

[0043] See attached image 3 , 4 , the diversion structure 1 is composed of a support rod and a round cake to form an overall structure, the axis of the round cake and the axis of the support rod intersect perpendicularly, the end face of the round cake and the side surface of the support rod are processed into a smooth transition plane; the two end faces of the round cake are The inclined plane of the axis, the tip composed of two annular inclined p...

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Abstract

The invention discloses a free field pressure sensor with a round cake-like integral structure, and belongs to the technical field of explosive shock wave overpressure field measurement. The sensor comprises a deflector structure, a positioning barrel, elastic elements, a core electrode, piezoelectric elements, pressure-bearing copper electrodes, an insulting positioning sleeve, a signal line, a connector and a cable connecting base. The core electrode is sleeved in a round cake-like axial through hole of the deflector structure. Two piezoelectric elements and two pressure-bearing copper electrodes are respectively arranged at two ends of the core electrode. The insulting positioning sleeve sleeves outer circumference surfaces of the core electrode, the piezoelectric elements and the pressure-bearing copper electrodes. The positioning barrel and two elastic elements are all sleeved in a gap between the insulating positioning sleeve and the round cake-like axial through hole of the deflector structure. One end of the connector is fixed in the axial through hole of a supporting rod of the deflector structure. The cable connecting base is installed in the other end of the axial through hole. Two ends of the signal line are respectively fixed in a through hole of the core electrode and on the cable connecting base. According to the invention, the free field pressure sensor with a round cake-like integral structure has the advantages that the water tightness and the impact resistance are relatively good, and the demands of an outdoor explosion test can be met.

Description

technical field [0001] The invention belongs to the technical field of explosion shock wave overpressure field measurement, and in particular relates to a round cake type free-field pressure sensor with an integral structure. Background technique [0002] The peak overpressure and impulse of the air shock wave generated by the explosive in the air are an important parameter of the energy characteristics of the explosive, and also an important index to measure the damage effect of the ammunition, especially the blasting and killing—blasting warhead. When directly measuring the shock wave overpressure passing vertically over the surface of the sensitive element of the component in the air explosion or water explosion shock wave overpressure field, a free field pressure sensor must be used; when installing this sensor, the support rod of this sensor must point to the center of the explosion. In field explosion tests, this free-field pressure sensor is suitable for direct measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L9/08
CPCG01L9/08
Inventor 吕中杰黄正平黄风雷刘彦段卓平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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