| 摘要 |
PURPOSE: A zero point adjustment system for a searching device is provided to achieve improved accuracy of adjustment by disposing a photo sensor at the center of the reference disk. CONSTITUTION: A zero point adjustment system comprises a reference disk(15) disposed in a pipe protruded from a chamber(10), and which has a photo sensor arranged at the center of the reference disk; a moving rail(7) opposed to the reference disk, and which has both ends fixed in the chamber through a fixing member(3); a horn antenna(1) arranged on the moving rail in such a manner that the horn antenna is movable; a laser pointer(4) disposed on the horn antenna, and which irradiates laser beam to the photo sensor arranged at the reference disk; and a signal processing unit(21) for processing the quantity of the laser beam irradiated to the photo sensor into signals. The signal processing unit includes a sensor signal processing part(16) for processing the sensing signal output from the photo sensor; a converter part(17) for converting the signal output from the sensor signal processing part into a digital signal; a control part(18) for converting the digital signal into a position value; and a display part(19) for displaying the position value.
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