Self-energy type thermal response monitoring device

Patent metadata

Field	Value
Publication number	US-12152944-B2
Application number	US-202117622248-A
Country	US
Kind code	B2
Filing date	Apr 25, 2021
Priority date	May 11, 2020
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

A self-energy type thermal response monitoring device includes a periphery constraint assembly, a variable-frequency beam arranged in the periphery constraint assembly, piezoelectric patches covering the variable-frequency beam, and an electric signal collector electrically connected to the piezoelectric patches. Deformation of the variable-frequency beam is limited by innovatively using rigid constraint, and a low-frequency thermal load is converted into a high-frequency post-buckling impact to trigger a piezoelectric material to generate an electric signal.

First claim

What is claimed is:

1. A self-energy type thermal response monitoring device, comprising a periphery constraint assembly, a variable-frequency beam arranged in the periphery constraint assembly, piezoelectric patches covering the variable-frequency beam, and an electric signal collector electrically connected to the piezoelectric patches,
wherein the upper support, the side constraint parts and the lower support are all made of a rigid material, the variable-frequency beam is an elongate flexible beam, and the variable-frequency beam is able to generate a post-buckling phenomenon to make the piezoelectric patches arranged at the two sides of the variable-frequency beam contact the side constraint parts.

2. The self-energy type thermal response monitoring device according to claim 1 , wherein the periphery constraint assembly comprises a lower support, side constraint parts fixedly connected to two sides of the lower support, and an upper support movably arranged at upper ends of the two side constraint parts; the variable-frequency beam is located in an accommodating space enclosed by the upper support, the lower support, and the side constraint parts; and an upper end and a lower end of the variable-frequency beam are fixedly connected to the upper support and the lower support respectively.

3. The self-energy type thermal response monitoring device according to claim 2 , wherein gaps are existent between the variable-frequency beam and the side constraint parts, and the variable-frequency beam is closer to one of the side constraint parts than the other one of the side constraint parts.

4. The self-energy type thermal response monitoring device according to claim 2 , wherein the variable-frequency beam has two sides correspond to the side constraint parts, two piezoelectric patches respectively cover the two sides of the variable-frequency beam; and the two piezoelectric patches are respectively connected to the electric signal collector through wires.

5. The self-energy type thermal response monitoring device according to claim 4 , wherein piezoelectric patches are each made of a piezoelectric material, the piezoelectric patches generate electric signals under pressure, and the electric signals are transmitted to the external electric signal collector through the wires.

Assignees

• Univ Zhejiang

Inventors

• Jiao Pengcheng
• Hou Bozhi
• Yang Jie
• Yang Yang

Classifications

• H02N2/18

  producing electrical output from mechanical input, e.g. generators (for measurement devices G01) · CPC title

• H02N2/186

  Vibration harvesters · CPC title

• G01B7/16

  for measuring the deformation in a solid, e.g. by resistance strain gauge · CPC title

• G01M5/0083

  by measuring variation of impedance, e.g. resistance, capacitance, induction · CPC title

• G01K5/58 Primary

  the solid body being constrained at more than one point, e.g. rod, plate, diaphragm (G01K5/62 takes precedence) · CPC title