Vehicle ultrasonic sensor control system and control method
AssigneeHyundai Mobis Co., Ltd.
InventorsTae Ho Lee, Young Hoon Kim
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Abstract
The present invention discloses a vehicle ultrasonic sensor control system including an ultrasonic sensor including an ultrasonic transducer generating ultrasonic waves and a control module controlling driving frequency of the ultrasonic waves emitted from the ultrasonic transducer, wherein a plurality of ultrasonic sensors are mounted on the outside of the vehicle; and a control unit setting a plurality of driving frequencies with a guard-band formed in between and controlling a control module so that the plurality of ultrasonic sensors emit and receive ultrasonic waves having driving frequencies different from each other.
Claims17
A system for controlling a vehicle ultrasonic sensor, comprising:
- a plurality of ultrasonic sensors attached to a vehicle, each ultrasonic sensor including (1) an ultrasonic transducer configured to generate ultrasonic waves and (2) a control module configured to control a driving frequency of the ultrasonic waves emitted from the ultrasonic transducer;
- and
- a control unit configured to (1) set a plurality of driving frequencies with a guard-band located therebetween and (2) control the control module such that each ultrasonic sensor emits and receives the ultrasonic waves, some sensors having a driving frequency different from that of the ultrasonic waves emitted and received from other ultrasonic sensors;
- wherein:
- the plurality of ultrasonic sensors is divided into a plurality of ultrasonic sensor groups, each ultrasonic sensor group comprising a plurality of ultrasonic sensors positioned adjacent to each other, and
- the control unit is configured to set the driving frequency of each ultrasonic sensor group to be different from each other;
- wherein:
- the control module includes a filter with a cutoff frequency set to filter the received ultrasonic waves, and
- the control unit is configured to set the guard-band based on a characteristic of the filter;
- and
- wherein:
- the filter includes a bandpass filter passing frequencies only within a preset frequency bandwidth, and
- the control unit is configured to set a bandwidth frequency of the guard-band to a value greater than the preset frequency bandwidth of the bandpass.
A method of operating a vehicle ultrasonic sensor for sensing a target, comprising:
- setting a plurality of driving frequencies for a plurality of ultrasonic sensors, wherein the plurality of driving frequencies are separated from each other with a guard-band located therebetween;
- controlling the plurality of ultrasonic sensors to emit and receive ultrasonic waves, wherein the ultrasonic waves emitted from and received by each ultrasonic sensor have a driving frequency different from that those of the ultrasonic waves emitted from and received by other ultrasonic sensors;
- setting the guard-band based on a characteristic of a filter, the filter having a cutoff frequency set to filter the received ultrasonic waves and including a bandpass filter passing frequencies only within a preset frequency bandwidth;
- setting a bandwidth frequency of the guard-band to a value greater than the preset frequency bandwidth of the bandpass;
- compensating a sensitivity of the ultrasonic waves reflected by and received from the target;
- and
- sensing the target based on the compensated sensitivity of the ultrasonic waves reflected by and received from the target.
Dependencies are inferred from the claim text.