| 摘要 |
<p>PURPOSE:To continuously perform a positive and negative nonlinear correction by a method wherein a sensing element converting a measured quantity into an electric signal is excited in proportion to a reference voltage to be obtained from the difference voltage between a variable voltage dividing point and a fixed voltage dividing point. CONSTITUTION:The output of a bridge circuit 20 having sensing elements Rg1-Rg4 converting a pressure et al into an electric signal is transferred to a receiving resistor 6 through a voltage/current converter 1. And further, a part of an output voltage is fed back to dividing resistors R01, R02 and a constant voltage Vz is fixedly divided and along with this, the variable voltage dividing circuit is formed from a variable resistor Rx and from the difference voltage of these, a reference voltage VR is obtained, thus, the bridge circuit 20 is controlled so as to be proportional to the reference voltage VR. As a result, the relation between an output current and the pressure can be made an approximate linear state by setting the variable resistor RX properly. Thus, with a simple structure, positive and negative nonlinea correction can be made smoothly.</p> |
