Patent ID: 7806603
Filing Date: 2010-10-05
Classification: G08C

Abstract:
1. An optical power supply sensing system comprising: a sensor unit including a light/electric power converter for converting light to electric power and a sensor for measuring physical quantity; a measurement unit including a light source for supplying light energy and a light reception device for receiving optical data; an optical output device mounted to said measurement unit; a first optical fiber which is optically coupled to said optical output device and is arranged in said sensor unit; a second optical fiber which is optically coupled to said optical output device and is arranged in said sensor unit; a light shielding mechanism which is mounted between one end of said first optical fiber and one end of said second optical fiber in said sensor unit, for selecting a shielding light or a penetrating light of the light transmitted from said first optical fiber to said second optical fiber; a determination circuit for controlling the shielding light or the penetrating light of said light shielding mechanism based on the output of said sensor; and a third optical fiber for connecting a light reception area of said light/electric power converter to said light source.