Detection apparatus, control method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsYuki Sawai, Megumi Maruyama
Life of this patent
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Abstract
A detection apparatus includes a second detection unit configured to detect lowering of a light reflectance of a reflection portion based on an output value based on light received by a light receiving portion while an object is moving on a conveyance path, without depending on at least a part of output values output based on light received by the receiving unit while the object is stopped on the conveyance path.
Claims17
A detection apparatus including a conveyance portion configured to convey an object via a conveyance path and discharge the object to a discharge portion, a reflection portion configured to reflect light, a light emitting portion configured to emit light in a direction where the reflection portion is positioned, and a light receiving portion configured to receive light from outside including light reflected from the reflection portion, the detection apparatus comprising:
- an acquisition unit configured to acquire an output value based on the light received by the light receiving portion;
- a first detection unit configured to detect, based on the output value, the object conveyed and passing through at least a part of a path of light through which light emitted by the light emitting portion passes after the light emitted by the light emitting portion is reflected by the reflection portion until the reflected light is received by the light receiving portion;
- and
- a second detection unit configured to detect lowering of a light reflectance of the reflection portion based on the output value output based on light received by the light receiving portion while the object is moving on a conveyance path, not based on at least a part of output values output based on light received by the receiving unit while the object is stopped on the conveyance path.
A control method of a detection apparatus including a conveyance portion configured to convey an object via a conveyance path and discharge the object to a discharge portion, a reflection portion configured to reflect light, a light emitting portion configured to emit light in a direction where the reflection portion is positioned, and a light receiving portion configured to receive light from outside including light reflected from the reflection portion, the control method comprising:
- acquiring an output value based on light received by the light receiving portion;
- detecting, by a first detection, the object conveyed and passing through at least a part of a path of light through which light emitted by the light emitting portion passes after the light emitted by the light emitting portion is reflected by the reflection portion until the reflected light is received by the light receiving portion, based on the output value;
- and
- detecting, by a second detection, lowering of a light reflectance of the reflection portion based on the output value output based on light received by the light receiving portion while the object is moving on a conveyance path, without depending on at least a part of output values output based on light received by the receiving unit while the object is stopped on the conveyance path.
A non-transitory computer-readable storage medium storing a program that causes a computer of an detection apparatus including a conveyance portion configured to convey an object via a conveyance path and discharge the object to a discharge portion, a reflection portion configured to reflect light, a light emitting portion configured to emit light in a direction where the reflection portion is positioned, and a light receiving portion configured to receive light from outside including light reflected from the reflection portion to execute a method, the method comprising:
- acquiring an output value based on the light received by the light receiving portion;
- detecting, by a first detection, the object conveyed and passing through at least a part of a path of light through which light emitted by the light emitting portion passes after the light emitted by the light emitting portion is reflected by the reflection portion until the reflected light is received by the light receiving portion, based on the output value;
- and
- detecting, by a second detection, lowering of a light reflectance of the reflection portion based on the output value output based on light received by the light receiving portion while the object is moving on a conveyance path, not based on at least a part of output values output based on light received by the receiving unit while the object is stopped on the conveyance path.
Dependencies are inferred from the claim text.