发明名称 |
TRASDUTTORE ALLO STATO SOLIDO CORRENTE-IN-PRESSIONE E CORRENTE-IN-MOVIMENTO |
摘要 |
<p>A transducer for converting an electrical current signal to a pneumatic pressure. A solid state element such as piezo-electric flapper element 48 is used to vary the pressure drop through a nozzle 46 to provide a controlled pressure supply 28. A micro-power electronic circuit 59 controls the flapper. A solid state pressure sensor 24 detects the output pressure and provides a feedback signal for use in a negative feedback loop to control the flapper element. The flapper element may be triangularly shaped to reduce its responsiveness to relatively low frequency mechanical vibrations. In a exemplary embodiment, where intrinsic safety requirements limit terminal voltages, the flapper element is driven by a transconductance amplifier 94 which is powered through a shunt regulator 82 and a voltage tripler 92. The shunt regulator provides operating potentials which are derived from the signal current.</p> |
申请公布号 |
IT1173491(B) |
申请公布日期 |
1987.06.24 |
申请号 |
IT19840020244 |
申请日期 |
1984.03.27 |
申请人 |
EDISON INTERNATIONAL INC |
发明人 |
PRESCOTT ROBERT C;GOLD CALMAN NMN;ANDERSON ERIC V |
分类号 |
G01D5/42;F15B5/00;G05D16/18;G05D16/20;(IPC1-7):G05B/ |
主分类号 |
G01D5/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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