公开(公告)号：US3886484A

公开(公告)日：1975-05-27

申请号：US48205074

申请日：1974-06-24

Applicant: HEWLETT PACKARD CO

Inventor： DIAS J FLEMING ,  KARRER HENRY E

IPC: H03B5/04 ,  H03B5/30 ,  H03B5/32 ,  H03H3/08 ,  H03H9/25 ,  H03H9/42

CPC classification number: H03B5/326

Abstract: More than one piezoelectric substrate or a single multifaceted piezoelectric substrate, each facet or substrate having interdigital transducers deposited thereon and coupled in cascade, comprise the acoustic surface wave device described herein which provides stable performance characteristics over broad temperature ranges.

公开(公告)号：US3878477A

公开(公告)日：1975-04-15

申请号：US40482974

申请日：1974-01-08

Applicant: HEWLETT PACKARD CO

Inventor： DIAS J FLEMING ,  KARRER HENRY E

IPC: G01L1/00 ,  G01B17/00 ,  G01D5/243 ,  G01D5/48 ,  G01L1/16 ,  G01L9/00 ,  G10K11/36 ,  H03B5/30 ,  H03C3/42 ,  H03H3/08 ,  H03H9/42 ,  G01B7/16 ,  H03B5/32 ,  H03B21/00

CPC classification number: G10K11/36 ,  G01L1/165 ,  G01L9/0025 ,  Y10S73/04

Abstract: An acoustic surface wave oscillator is employed as a forcesensing device. Dual acoustic surface wave oscillators coupled to a single substrate of piezoelectric material which inversely change their respective frequencies in response to a force applied normal to the surface of the substrate comprise a highsensitivity, temperature-compensated force-sensing device. The outputs of the oscillators are applied to an electronic mixer circuit to produce a difference frequency output signal which is a function of the applied force. Other configurations utilizing the force-sensing properties of acoustic surface wave oscillators are disclosed.

Abstract translation: 采用声表面波振荡器作为力传感装置。 耦合到压电材料的单个衬底的双声表面波振荡器响应于垂直于衬底的表面施加的力而相反地改变它们各自的频率，包括高灵敏度的温度补偿的力感测装置。 振荡器的输出被施加到电子混频器电路以产生作为所施加的力的函数的差频输出信号。 公开了利用声表面波振荡器的力感测特性的其它结构。