| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a torque sensor that increases measurement accuracy by performing a transmission/reception of a detection signal by a contactless method and a power supply thereby, and does not require a maintenance operation conventionally required.SOLUTION: The torque sensor comprises: a torque detection shaft 1 that is configured to be rotatably supported by side walls 8a and 8b of an enclosure 9, and have respective strain gauges 2 provided on four plates 1a, 1b, 1c and 1d serving as a strain part; a detection circuit 31 that is provided on a substrate 3 fixed to the torque detection shaft 1 and connected to the strain gauge 2, processes an electric signal from the strain gauge 2 and transmits the processed electric signal as a detection signal by infrared communication; an output detection circuit 32 that is provided on a substrate 7a fixed to the enclosure 9, receives the detection signal from the detection signal 31 and externally outputs the detection signal; an electric power source 33 that is provided on the substrate 7a, and supplies an externally supplied electric power to the output circuit 32; and a rotary transformer that is composed of a fixture side coil 6 having the electric power supplied from the electric power source 33 and a shaft side coil 5 contactlessly supplying the electric power to the detection circuit 31.</p> |
