Distance detection sensor and operating method thereof
AssigneeHyundai Autron Co., Ltd.
InventorChul Seung LEE
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Abstract
A distance detection sensor includes a current-to-voltage converter configured to convert a current corresponding to a detection signal reflected from a target to a voltage, an amplifier configured to amplify the converted voltage, a comparator configured to compare an output value of the amplifier with a reference value to generate a receive pulse, a reference value selector configured to select any one of a plurality of reference values as the reference value, and a time-to-digital converter configured to calculate time-of-light (TOF) time in response to the receive pulse output from the comparator. The reference value selector continuously changes different reference values respectively corresponding continuous receive pulses.
Claims14
A distance detection sensor comprising:
- a current-to-voltage converter configured to convert a current corresponding to a detection signal reflected from a target to a voltage;
- an amplifier configured to amplify the converted voltage;
- a comparator configured to compare an output value of the amplifier with a reference value to generate a receive pulse;
- a reference value selector configured to select any one of a plurality of reference values as the reference value;
- and
- a time-to-digital converter configured to calculate time-of-light (TOF) time in response to the receive pulse output from the comparator,
- wherein the reference value selector continuously changes different reference values respectively corresponding continuous receive pulses.
An operating method of a distance detection sensor, comprising:
- transmitting continuous transmit pulses to a target;
- changing a reference value corresponding to each of the transmit pulses;
- continuously receiving a signal corresponding to each of the transmit pulses according to is the changed reference value;
- calculating time-of-flight (TOF) peak time from received receive pulses respectively corresponding to the transmit pulses;
- and
- calculating a distance to the target from the TOF peak time.
Dependencies are inferred from the claim text.