Obstacle detection by global shutter image sensor
AssigneeBlack Sesame International Holding Limited
InventorsJizhang Shan, Kuochin Chang
Life of this patent
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Abstract
A system to avoid obstacles, having an infrared emitter emitting an infrared pulse, an infrared receiver aligned with the infrared emitter so as to receive a reflection of the infrared pulse, a timer coupled to the infrared emitter and infrared receiver, the timer controlling a length of time the infrared emitter emits the infrared pulse and an exposure duration of the infrared receiver, the timer simultaneously initiates the emitting of the infrared pulse and an initiation of the exposure duration of the infrared receiver, and a controller coupled to the timer, the infrared emitter and the infrared receiver to adjust the exposure duration of the infrared receiver to determine a distance of an object reflecting the emitted infrared pulse.
Claims20
A system to avoid obstacles, comprising:
- an infrared emitter emitting an infrared pulse;
- an infrared receiver aligned with the infrared emitter so as to receive a reflection of the infrared pulse;
- a timer coupled to the infrared emitter and infrared receiver, the timer controlling a length of time the infrared emitter emits the infrared pulse and an exposure duration of the infrared receiver, the timer simultaneously initiates the emitting of the infrared pulse and an initiates the exposure of the infrared receiver;
- and
- a controller coupled to the timer, the infrared emitter and the infrared receiver to adjust the exposure duration of the infrared receiver to determine a distance of an object reflecting the emitted infrared pulse.
A method to avoid obstacles, comprising:
- emitting a ground truth infrared pulse;
- receiving a reflection of the ground truth infrared pulse within a ground truth exposure duration, wherein an initiation of the emission of the ground truth infrared pulse and an initiation of the ground truth exposure duration coincide temporally;
- determining a ground truth object distance based on a received reflection of the ground truth infrared pulse;
- emitting a second infrared pulse;
- receiving a second reflection of the second infrared pulse within a second pulse exposure duration, wherein an initiation of the emission of the second infrared pulse and an initiation of the second pulse exposure duration coincide temporally, and wherein the second pulse exposure duration exceeds the ground truth exposure duration;
- and
- determining a second object distance based on a received reflection of the second infrared pulse.
Dependencies are inferred from the claim text.