Damage identifying piezoelectric sensor capable of repeated use
A technology of piezoelectric sensing and piezoelectric ceramic sheet, which is applied in the field of sensors, can solve the problems of damage identification result error, electrical signal difference, and natural vibration frequency difference, and achieve convenient processing, high practicability, and enhanced impact resistance Effect
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] 1. Specific examples
[0022] A reusable piezoelectric sensing device for identifying damage such as figure 1 , figure 2 , image 3 and Figure 4 As shown, it includes a piezoelectric ceramic sheet 1, and also includes a metal box body 3 for bonding with the surface of the measured component 2. The center of the top plate of the metal box body 3 is provided with a wire passing hole 4, and one side of the metal box body 3 The side wall extends vertically upwards to form a knocking surface 5 for knocking off the metal box body 3 and the component under test 2. The piezoelectric ceramic sheet 1 is located in the metal box body 3 and is tightly pasted and fixed on the bottom plate of the metal box body 3. The wire 6 of the electroceramic sheet 1 passes through the wire exit hole 4 and is connected to an external impedance analyzer (not...
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