US 12,092,553 B1
Integrated broadband energy collecting and sensing device for rod-cable structure
Chunli Zhang, Hangzhou (CN); Qichen Wen, Hangzhou (CN); and Weiqiu Chen, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed on Apr. 9, 2024, as Appl. No. 18/630,978.
Claims priority of application No. 202310371573.4 (CN), filed on Apr. 10, 2023.
Int. Cl. G01M 5/00 (2006.01); H02N 2/18 (2006.01)
CPC G01M 5/0066 (2013.01) [G01M 5/0025 (2013.01); G01M 5/0041 (2013.01); H02N 2/188 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An integrated broadband energy collecting and sensing device for a rod-cable structure, comprising: an inner layer sleeve, an outer layer sleeve, a first piezoelectric thin film sensor, a self-powered module and a control communication module; wherein the inner layer sleeve and the outer layer sleeve are coaxially fixed; the self-powered module is arranged between an outer side surface of the inner layer sleeve and an inner side surface of the outer layer sleeve; the first piezoelectric thin film sensor is arranged on an inner side surface of the inner layer sleeve; and the self-powered module supplies a power for the control communication module;
the self-powered module comprises a plurality of vibrator groups; each vibrator group comprises a plurality of piezoelectric vibrators arranged in sequence along a circumferential direction of the inner layer sleeve; each piezoelectric vibrator comprises an elastic substrate, a piezoelectric ceramic sheet and a mass block; the piezoelectric ceramic sheet is fixed on a side surface of the elastic substrate; an inner end of the elastic substrate is fixed with the outer side surface of the inner layer sleeve; the mass block is fixed at an outer end of the elastic substrate; an included angle θ is formed between the side surface of the elastic substrate and an axis of the inner layer sleeve; and a value of θ is 30° to 60°;
a plurality of amplitude limiting blocks with the same number as the piezoelectric vibrators are fixed on the inner side surface of the outer layer sleeve; the amplitude limiting blocks are fixed on the inner side surface of the outer layer sleeve; in a circumferential direction of the inner side surface of the outer layer sleeve, the mass block on any piezoelectric vibrator is located between two adjacent amplitude limiting blocks; a second piezoelectric thin film sensor is fixed on one or two side surfaces of part or all of the amplitude limiting blocks; and the amplitude limiting block restrains a swing amplitude of the piezoelectric vibrator;
qualities of mass blocks in different vibrator groups are different; resonance frequencies of the piezoelectric vibrators in different vibrator groups are all within a vibration frequency range of a rod structure or a cable structure of a monitored building; and
in a working process, signals of the second piezoelectric thin film sensor and the first piezoelectric thin film sensor are collected to analyze a vibration condition of the rod structure or the cable structure of the building, a vibration signal received by the first piezoelectric thin film sensor corresponds to a structural vibration; and a vibration signal received by the second piezoelectric thin film sensor corresponds to combination of a wind-induced vibration and a structural vibration.