| 摘要 |
A proximity sensor (10) is provided with a sensor element (11) and a detection circuit (16). The sensor element is provided with a base material (13) wherein coil-like carbon fiber (12) is dispersed. A high frequency oscillation circuit (19) of the detection circuit (16) supplies the sensor element with a high frequency signal. A detector (22) in the detection circuit (16) receives an output signal from the sensor element (11) and detects proximity of an object (24). In one example, the coil-like fiber is contained in the base material by 1-20 mass%. In another example, a high frequency oscillation circuit generates a high frequency signal of 100-800kHz. |
