| 摘要 |
The present invention relates to an inductive sensor circuit. The inductive sensor circuit according to one embodiment of the present invention for improving the response speed of a sensor comprises: a detection circuit unit comprising a condenser, which is connected in parallel to the inductor of the sensor and forms an oscillation circuit, a first operational amplifier for receiving as an input and amplifying the electrical signal of an oscillation waveform generated by the oscillation circuit, a filter unit for receiving as an input, rectifying, and smoothing the electrical signal amplified by the first operational amplifier, and a first control unit for converting into a first digital signal and outputting the electrical signal rectified and smoothed by the filter unit; a linearization circuit unit comprising a second control unit for receiving as an input an analogue signal measured by the micrometer of the sensor, converting same into a second digital signal, comparing the second digital signal with the first digital signal, and outputting a linearized data signal, a zero adjuster for adjusting the zero point of the data signal, and a span adjuster for adjusting the maximum value of the zero point; an output circuit unit comprising a third control unit for receiving as an input, converting into an analogue voltage signal, and outputting the data signal output by the second control unit, a second operational amplifier for reading and outputting the code of the voltage signal input by the third control unit, and a third operational amplifier for amplifying and transmitting to an external output terminal the voltage signal input by the second operational amplifier; and a power circuit unit for providing a constant voltage for circuit operation and supplying a reference voltage to an A/D converter embedded in the second control unit. |
