PVDF piezoelectric film impact monitoring sensor

Abstract

The invention discloses a PVDF piezoelectric film impact monitoring sensor which comprises a PVDF piezoelectric film, a positive electrode layer, a negative electrode layer, an upper protection layer and a lower protection layer. The upper surface and the lower surface of the PVDF piezoelectric film are covered with the positive electrode layer and the negative electrode layer respectively. By means of double-side pressure welding, a positive electrode wire and a negative electrode wire are connected with the positive electrode layer and the negative electrode layer; the positive electrode layer and the negative electrode layer are covered with insulating layers, a groove is formed in the surface of the lower protection layer, and the PVDF piezoelectric film covered with the positive electrode layer, the negative electrode layer and the insulating layers is placed in the groove of the lower protection layer; the upper protection layer and the lower protection layer are attached together through epoxy resin to form an empty cavity so as to seal and protect the PVDF piezoelectric film; the positive electrode wire and the negative electrode wire are led out of the cavity. The PVDF piezoelectric film impact monitoring sensor comprises a receiver which can be arranged in an impacted monitoring area to be used for directly receiving impact signals so as to obtain the impact stress value under the impact load effect.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a PVDF piezoelectric film impact monitoring sensor. Background technique [0002] At present, the piezoelectric film sensor made of PVDF (Polyvinylidene Fluoride) piezoelectric film is mainly pasted on the surface of the tested structure, and the test structure is impacted to cause structural vibration, but the PVDF piezoelectric sensor cannot be pasted at the impact point of the measured structure. , but a certain distance from the impact point, which is received by the signal processor in the form of an electrical signal. The PVDF piezoelectric film sensor cannot directly measure the impact load stress value at the impact point. Contents of the invention [0003] In order to solve the problems of the technologies described above, the object of the invention is to provide a PVDF piezoelectric film impact monitoring sensor, and the specific technical scheme is as follows: [...

AI Technical Summary

Problems solved by technology

[0002] At present, the piezoelectric film sensor made of PVDF (Polyvinylidene Fluoride) piezoelectric film is mainly pasted on the surface of the tested structure, and the test structure is impacted to cause structural vibration, but the PVDF piezoelectric sensor cannot be pasted at the impact point of the measured structure. , but at a certain distance from the impact point, it is received by the signal processor in the form of an electrical signal

The PVDF piezoelectric film sensor cannot directly measure the impact load stress value at the impact point

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