| 摘要 |
<p>The output from a strain gauge bridge 13 on a shaft is transmitted to a fixed detector 27, 29, 31 using only two coupling capacitors 19, 23, and 21, 25, each with a rotating plate 19 or 21 and a fixed plate 23 or 25, by applying the voltage from the bridge to a voltage to frequency converter 15 also mounted on the shaft. The converter 15 provides a square wave signal with frequency proportional to strain. This is received by the detector circuit as a differentiated square wave. A squaring amplifier 29 and frequency to voltage converter 31 reconstitute a voltage proportional to strain.</p> |
