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1. 发明授权

EP0061359B1 Capacitive pressure transducer 失效
标题翻译：电容式压力变送器
公开(公告)号：EP0061359B1
公开(公告)日：1985-05-15
申请号：EP82400191.1
申请日：1982-02-04
申请人： THE BENDIX CORPORATION
发明人： Ohnesorge, David Henry , Antonazzi, Frank Joseph
IPC分类号： G01L9/12
CPC分类号： G01L9/12 , G01L9/0075 , G01L9/0086

2. 发明公开

EP0069647A3 Pressure ratio measurement system 失效
标题翻译：压力比测量系统
公开(公告)号：EP0069647A3
公开(公告)日：1983-04-13
申请号：EP82401191
申请日：1982-06-28
申请人： THE BENDIX CORPORATION
发明人： Antonazzi, Frank Joseph
IPC分类号： G01L15/00 , G01L09/12
CPC分类号： G01L9/12 , G01L15/00
摘要： A pressure ratio measuring system is disclosed. The system includes two quartz capacitive pressure transducers (16, 22). Each capsule contains a pressure sensitive capacitor (Csa, Csf) which is fed by an alternating excitation signal. Capacitance (Csa) is fed by excitation signal (Vr) and Capacitance (Csf) is fed out of phase by feedback excitation signal (-Vrf(N)). The outputs of the capacitance are combined in a summing junction (36) whose output is an error signal (1e) proportional to the pressure ratio. A feedback loop (26) is closed through a register (30) and a multiplying digital to analog converter (32) to generate the feedback signal (-Vrf(N)). The feedback loop (26) integrates the error signal (1e) by incremental changing the feedback signal (-Vrf(N)) with digital number (N) in a direction to null the loop. When the loop is nulled the digital number (N) is a representation of the ratio (Pa/Pb) of the pressure (Pa) sensed by capacitance (Csf).

3. 发明公开

EP0061359A1 Capacitive pressure transducer 失效
标题翻译：卡普塔特
公开(公告)号：EP0061359A1
公开(公告)日：1982-09-29
申请号：EP82400191.1
申请日：1982-02-04
申请人： THE BENDIX CORPORATION
发明人： Ohnesorge, David Henry , Antonazzi, Frank Joseph
IPC分类号： G01L9/12
CPC分类号： G01L9/12 , G01L9/0075 , G01L9/0086
摘要： Capacitive pressure transducer (26) having a multiplicity of signal plates (Cs, Cr, Csf, Crf) disposed on a first quartz disc (88). Opposing the signal plates (Cs, Cr, Csf, Crf) across a gap formed by an annular frit (92) is a common plate (94) disposed on a second quartz disc (86). The signal plates (Cs, Cr, Csf, Crf) and common plate (94) form capacitors which are operable to modulate alternating excitation signals applied to the signal plates. The capacitances vary the modulation during deflections of the discs (86,88) as a result of pressure changes and the common plate (94) algebraically sums the modulated excitation signals into a single output from the transducer (26).
摘要翻译：具有设置在第一石英盘（88）上的多个信号板（Cs，Cr，Csf，Crf）的电容式压力传感器（26）。跨越由环形玻璃料（92）形成的间隙的信号板（Cs，Cr，Csf，Crf）是设置在第二石英盘（86）上的公共板（94）。信号板（Cs，Cr，Csf，Crf）和公共板（94）形成可用于调制施加到信号板的交替激励信号的电容器。电容由于压力变化而导致盘（86,88）偏转期间的调制，并且公共板（94）将调制的激励信号代数地与来自换能器（26）的单个输出相加。

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