| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain a dishwasher capable of securely measuring turbidity of washing water by absorbing variations in light-emitting and light-receiving parts and installing variations thereof even under a condition where a light-emitting amount or a light-receiving amount decreases. <P>SOLUTION: A turbidity sensor device has a light-emitting element 2 and a light-receiving element 3 oppositely arranged across a pipe of a washing water circuit, a light-emitting control circuit 6 for controlling the light-emitting amount of the light-emitting element 2 by a PWM output from a microcomputer device, and a light-receiving circuit 7 for extracting a voltage value input to the microcomputer device from a current flowing at the light-receiving element 3. The microcomputer device has a plurality of voltage levels in a software program as reference values to be compared with voltage values extracted from the light-receiving circuit 7, thereby measuring turbidity of washing water stably and securely even if a light-receiving current is small when a light-emitting amount or a light-receiving amount decreases due to variations in the respective elements and parts and installing variations thereof. <P>COPYRIGHT: (C)2013,JPO&INPIT |
