Detection device
First Claim
1. A detection device for detecting conditions at a target position by irradiating a laser light to the target position, comprising:
- irradiation means for irradiating the laser light to the target position;
light reception means for receiving a laser light from the target position;
modulation means for modulating the laser light irradiated from the irradiation means;
distinction means for distinguishing whether a modulation state of the laser light irradiated from the irradiation means matches with a modulation state of the laser light received by the light reception means;
detection means for detecting conditions of the target position based on a light reception state in the light reception means when the distinction means distinguishes that the modulation state of the laser light irradiated from the irradiation means matches with the modulation state of the laser light received by the light reception means.
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Accused Products
Abstract
An object of the present invention is to provide a detection device which does not cause the false detection by receiving laser light from an oncoming car. The pulse laser light modulated with a modulation pattern set every target position is irradiated at the target position from a laser irradiation portion. DSP (Digital Signal Processor) decides that there is an obstacle at the target position only when the modulation pattern of the pulse laser light emitted from the laser emitting portion matches with the modulation pattern of the pulse laser light received by the laser receiving portion. It is suppressed that the detection device misdetects the conditions of the target position when receiving laser light from an oncoming car or the like because modulation pattern of laser light from own does not match with modulation pattern of laser light from the oncoming car or the like.
64 Citations
17 Claims
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1. A detection device for detecting conditions at a target position by irradiating a laser light to the target position, comprising:
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irradiation means for irradiating the laser light to the target position;
light reception means for receiving a laser light from the target position;
modulation means for modulating the laser light irradiated from the irradiation means;
distinction means for distinguishing whether a modulation state of the laser light irradiated from the irradiation means matches with a modulation state of the laser light received by the light reception means;
detection means for detecting conditions of the target position based on a light reception state in the light reception means when the distinction means distinguishes that the modulation state of the laser light irradiated from the irradiation means matches with the modulation state of the laser light received by the light reception means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A detection device for detecting conditions at a target position by irradiating a laser light to the target position, comprising:
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a irradiation portion for irradiating the laser light to the target position;
a light reception portion for receiving a laser light from the target position;
a modulation circuit for modulating the laser light irradiated from the irradiation portion;
a distinction circuit for distinguishing whether a modulation state of the laser light irradiated from the irradiation portion matches with a modulation state of the laser light received by the light reception portion;
a detection circuit for detecting conditions of the target position based on a light reception state in the light reception portion when the distinction portion distinguishes that the modulation state of the laser light irradiated from the irradiation portion matches with the modulation state of the laser light received by the light reception portion. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification