Optical reflection sensor
First Claim
1. An optical reflection sensor comprising:
- a light emitter for emitting light towards a target object;
a light receiver for receiving reflected light from said target object;
a signal processor for carrying out specified measurements on the reflected light received by said light receiver;
a display device incorporated in a housing for said sensor;
calculating means for calculating repeatability of measured values obtained by a plurality of said measurements; and
display control means for causing calculated result of said repeatability to be displayed on said display device.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical reflection sensor emits light and its reflection from a target object is received. A signal processor carries out a measurement on the received reflected light such as the distance to the target object each time the reflected light is received. Repeatability of measured values is calculated and displayed on a display device incorporated into the housing of the sensor. The display device may have two display areas such that the calculated repeatability and the measured value can be displayed simultaneously. The calculated repeatability may be compared with a specified threshold value, with the result of the comparison displayed. The housing may also incorporate an input device through which a required level of accuracy may be set.
29 Citations
20 Claims
-
1. An optical reflection sensor comprising:
-
a light emitter for emitting light towards a target object;
a light receiver for receiving reflected light from said target object;
a signal processor for carrying out specified measurements on the reflected light received by said light receiver;
a display device incorporated in a housing for said sensor;
calculating means for calculating repeatability of measured values obtained by a plurality of said measurements; and
display control means for causing calculated result of said repeatability to be displayed on said display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20)
-
-
12. An optical reflection sensor comprising:
-
a light emitter for emitting light towards a target object;
a light receiver for receiving reflected light from said target object; and
a signal processor for carrying out a specified measurement on the reflected light received by said light receiver, making a comparison between the result of said measurement and a specified threshold value and outputting a result of said comparison, said signal processor including;
accuracy calculating means for calculating repeatability of measured values obtained by a plurality of said measurements; and
setting means for setting a threshold width on the basis of the calculated repeatability.
-
-
16. An optical reflection sensor comprising:
-
a light emitter for emitting light towards a target object;
a light receiver for receiving reflected light from said target object; and
a signal processor for carrying out a specified measurement on the reflected light received by said light receiver and outputting a result of said measurement;
said signal processor including;
an input device for setting a required accuracy level for the outputted result of said measurement;
averaging means for carrying out an averaging process for averaging a specified number of measured values obtained from each cycle of said reflected light while varying said specified number; and
accuracy calculating means for calculating repeatability of a plurality of the averaged measured values;
said signal processor continuing said specified measurement at least until the calculated repeatability reaches said required accuracy level set through said input device.
-
Specification