| 摘要 |
<p>An improved transducer bridge circuit in a pressure gauge having reactive transducer elements such as inductance coils (18,18 min ). The electrical bridge includes first and second legs (28,30) each having a fixed resistor (22,22 min ) in series with a coil (18,18 min ). The first and second legs (28,30) are connected in parallel whereby a resistor junction (24) and a coil junction (26) are formed at the extremities of the legs. A voltage oscillator (20) is connected to the resistor junction (24), and means (32) for maintaining a constant voltage are connected to the coil junction (26). A differential amplifier (36) is connected (A,B) to each leg between the fixed resistor (22,22 min ) and the coil (18,18 min ) such that the differential change in coil reluctances due to pressure variations, is amplified and manifested in a readout unit (34). This bridge is particularly advantageous when the oscillator (20) and electronic processing components (22,36,34) are to be located remotely, such as outside a nuclear containment building (10), relative to the sensing coils (18).</p> |
