| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a photoelectric-sensing sensitivity adjustment device of field equipment which can automatically adjust an amount of light of a light emitting element (LED etc.) without depending on an operator's sense and without exposing the inside of the apparatus to the outside air, and can perform a stable adjustment. <P>SOLUTION: The photoelectric-sensing sensitivity adjustment device includes: an LED which is supplied with energy (current or voltage) to emit light; an LED-driving regulator which supplies energy to the LED; a light receiving device which receives light emitted from the LED; a digital potentiometer which controls increase and decrease of energy to be supplied to the LED; a CPU which digitally controls increase and decrease of energy to be supplied to the LED according to a control program; and a light detecting unit which detects a light signal, converts the light signal into an electric signal, and then outputs the electric signal. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
