To provide an operating time measuring apparatus 21 which has less restrictions on installation of a sensor part 23 and in which the sensor part 23 can be easily installed.
The sensor part 23 is arranged on the outside of a motor. The sensor part 23 is provided with a magneto-electric conversion element 32 which detects a magnetic flux generated by operation of the motor to output an electric signal. A rotation discrimination part 40 is provided which discriminates the operation of the motor on the basis of the electric signal outputted from the sensor part 23. An integration part 41 is provided which integrates the operation time while the rotation discrimination part discriminates that the motor is operated. A display part 27 on which the operation time integrated by the integration part 41 is displayed is provided to the instrument 21.
FUJINAKA YOSHIFUMI
JPS58203588A | 1983-11-28 | |||
JP2002365311A | 2002-12-18 | |||
JPH038771U | 1991-01-28 |
Satoshi Kabazawa
Tetsuya Yamada