Object detection using sonic waves
First Claim
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1. An apparatus having a sensor including an output unit for outputting a sonic wave and an input unit for inputting a sonic wave from outside, the apparatus comprising:
- a control unit configured to cause the output unit to output a first sonic wave for a first time period and a second sonic wave for a second time period following the first time period and which is shorter than the first time period; and
a determination unit configured to determine whether there is an object in a first area, based on a first reflected wave of the first sonic wave input to the input unit after the output unit outputs the first sonic wave and after a first masking period longer than the first time period and overlapping with the first time period, and to determine whether there is an object in a second area which is closer to the apparatus than the first area, based on a second reflected wave of the second sonic wave input to the input unit after the output unit outputs the second sonic wave and after a second masking period longer than the second time period and overlapping the second time period and which is shorter than the first masking period.
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Abstract
A transmission unit is caused to transmit a first wave from a transmission unit that transmits waves, and a second wave. Based on a first reflected wave of the first wave and a second reflected wave of the second wave, it is determined whether there is an object outside of the apparatus.
31 Citations
12 Claims
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1. An apparatus having a sensor including an output unit for outputting a sonic wave and an input unit for inputting a sonic wave from outside, the apparatus comprising:
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a control unit configured to cause the output unit to output a first sonic wave for a first time period and a second sonic wave for a second time period following the first time period and which is shorter than the first time period; and a determination unit configured to determine whether there is an object in a first area, based on a first reflected wave of the first sonic wave input to the input unit after the output unit outputs the first sonic wave and after a first masking period longer than the first time period and overlapping with the first time period, and to determine whether there is an object in a second area which is closer to the apparatus than the first area, based on a second reflected wave of the second sonic wave input to the input unit after the output unit outputs the second sonic wave and after a second masking period longer than the second time period and overlapping the second time period and which is shorter than the first masking period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method executed in an apparatus having a sensor including an output unit for outputting a sonic wave and an input unit for inputting a sonic wave from outside, the method comprising:
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causing the output unit to output a first sonic wave for a first time period and to output and a second sonic wave for a second time period following the first time period and which is shorter than the first time period; and determining whether there is an object in a first area, based on a first reflected wave of the first sonic wave input to the input unit after the output unit outputs the first sonic wave and after a first masking period longer than the first period and overlapping with the first time period, and determining whether there is an object in a second area which is closer to the apparatus than the first area, based on a second reflected wave of the second sonic wave input to the input unit after the output unit outputs the second sonic wave and after a second masking period longer than the second time period and overlapping the second time period and which is shorter than the first masking period.
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Specification