Object detecting apparatus and irregularity detecting device for the same
First Claim
1. An object detecting apparatus for detecting an object or a distance from the object, the object detecting apparatus comprising:
- a case;
an electromagnetic wave generation portion disposed in the case to generate and radiate a searching electromagnetic wave;
a projection window portion disposed in the case, the projection window portion having a wave passing surface made of a wave permeating material for passing through the searching electromagnetic wave generated from the electromagnetic wave generation portion;
an electromagnetic wave receiving portion disposed in the case for receiving a reflected wave of the searching electromagnetic wave, reflected from the object;
an entrance window portion disposed in the case, the entrance window portion having a wave passing surface made of a wave permeating material for passing through the reflected wave before being received to the electromagnetic wave receiving portion;
a first light receiving element disposed in the case to detect a light quantity of a direct current part of light entering from at least one of the projection window portion and the entrance window portion; and
an irregularity determining portion which determines a state of at least one of the projection window portion and the entrance window portion using at least the detected light quantity of the first light receiving element.
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Accused Products
Abstract
An object detecting apparatus for detecting an object or a distance with the object includes at least one light receiving element for detecting a light quantity entering from a sensor window portion for example, a projection window portion and an entrance window portion through which an electromagnetic wave from an electromagnetic wave generation portion toward an object and a reflected electromagnetic wave from the object pass. Furthermore, an irregularity determining portion determines a state of at least one of the projection window portion and the entrance window portion using at least the detected light quantity of the light receiving element. For example, the light receiving element includes a first light receiving portion and a second light receiving portion which receive the light quantities of direct current part of light entering from the first and second light receiving portions.
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Citations
17 Claims
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1. An object detecting apparatus for detecting an object or a distance from the object, the object detecting apparatus comprising:
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a case;
an electromagnetic wave generation portion disposed in the case to generate and radiate a searching electromagnetic wave;
a projection window portion disposed in the case, the projection window portion having a wave passing surface made of a wave permeating material for passing through the searching electromagnetic wave generated from the electromagnetic wave generation portion;
an electromagnetic wave receiving portion disposed in the case for receiving a reflected wave of the searching electromagnetic wave, reflected from the object;
an entrance window portion disposed in the case, the entrance window portion having a wave passing surface made of a wave permeating material for passing through the reflected wave before being received to the electromagnetic wave receiving portion;
a first light receiving element disposed in the case to detect a light quantity of a direct current part of light entering from at least one of the projection window portion and the entrance window portion; and
an irregularity determining portion which determines a state of at least one of the projection window portion and the entrance window portion using at least the detected light quantity of the first light receiving element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. An object detecting apparatus for detecting an object or a distance from the object, the object detecting apparatus comprising:
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a case;
an electromagnetic wave generation portion disposed in the case to generate and radiate a searching electromagnetic wave;
a projection window portion disposed in the case, the projection window portion having a wave passing surface made of a wave permeating material for passing through the searching electromagnetic wave generated from the electromagnetic wave generation portion;
an electromagnetic wave receiving portion disposed in the case for receiving a reflected wave of the searching electromagnetic wave, reflected from the object;
an entrance window portion disposed in the case, the entrance window portion having a wave passing surface made of a wave permeating material for passing through the reflected wave before being received to the electromagnetic wave receiving portion;
a light receiving element disposed in the case at a position where a direct current part of light entering from at least one of the projection window portion and the entrance window portion is restricted to be received, so as to detect a scattering light part of the direct current part, which generates when dirt adheres on at least one of the projection window portion and the entrance window portion; and
an irregularity determining portion which determines a state of at least one of the projection window portion and the entrance window portion using the detected light quantity of the light receiving element.
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11. An irregularity detecting device for an object detecting apparatus including a sensor window portion through which an electromagnetic wave from an electromagnetic wave generating portion toward an object and a reflected electromagnetic wave from the object pass, the irregularity detecting device comprising:
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a light receiving element disposed to detect a light quantity entering from the sensor window portion; and
an irregularity determining portion which determines a state of the sensor window portion using the detected light quantity of the light receiving element. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification