发明授权
- 专利标题: Process for compensating temperature variations in surface wave devices and pressure transducer utilizing this process
- 专利标题(中): 利用此过程补偿表面波装置和压力传感器的温度变化的过程
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申请号: US149244申请日: 1980-05-12
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公开(公告)号: US4338575A公开(公告)日: 1982-07-06
- 发明人: Pierre Hartemann
- 申请人: Pierre Hartemann
- 申请人地址: FRX Paris
- 专利权人: Thomson-CSF
- 当前专利权人: Thomson-CSF
- 当前专利权人地址: FRX Paris
- 优先权: FRX7912458 19790516
- 主分类号: G01L1/00
- IPC分类号: G01L1/00 ; G01H11/08 ; G01L9/00 ; G01P15/08 ; H03H3/08 ; H03H9/25 ; H03L1/02 ; G01N27/00 ; H03B3/04 ; H03H9/42
摘要:
An arrangement for temperature compensating transducers including two elastic surface wave oscillators whose frequencies are mixed to produce an output frequency that is a function of a parameter to be measured such as force, pressure or acceleration. A delay element such as a transmission line having a delay that is a function of temperature is inserted into the loop of at least one of the oscillators to balance oscillator frequency deviations resulting from temperature changes.
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