Displacement sensor equipped with automatic setting device for measurement region

A displacement sensor comprising:

• a light projecting element for illuminating a measurement aim object at a predetermined angle with light;
• a light receiving element for receiving a reflected light from the measurement aim object illuminated with light;
• an automatic measurement aim region setting device for automatically increasing a light receiving gain of the light receiving element by a predetermined quantity or a predetermined ratio at a time from a predetermined value thereof till two or more reflecting surfaces of a measuring aim object are acquired on the light receiving element, and automatically setting measurement regions for respective at least two reflecting surfaces acquired;
• and
• a displacement measuring device performing desired measurement of displacement based on a received light image of the receiving light element corresponding to the set measurement aim regions.

A displacement sensor comprising:

• a light projecting element for illuminating a measurement aim object at a predetermined angle with light;
• a light receiving element for receiving a reflected light from the measurement aim object illuminated with light;
• an automatic measurement aim region setting device for automatically increasing a light emitting quantity of the light projecting element and a light receiving gain of the light receiving element, both simultaneously, by a predetermined quantity or a predetermined ratio at a time from a predetermined value thereof till two or more reflecting surfaces of the measurement aim object are acquired on the light receiving element, and automatically setting measurement aim regions for respective at least two reflecting surfaces acquired;
• and
• a displacement measuring device performing desired measurement of displacement based on a received light image on the receiving light element corresponding to the set measurement aim regions.