ULTRASONIC OBJECT DETECTORS USE

Brand	Owner (click to sort)	Address	Description
BACKUP NAVIGATOR	Mark Swannie	22 Golden Poppy Dr. Coto De Caza CA 92679	Ultrasonic object detectors for use on vehicles;
PARK ADDVANTAGE	Rostra Precision Controls, Inc.	2915 Dana Drive Laurinburg NC 28352	ultrasonic object detectors for use on vehicles;
PARKING NAVIGATOR	Mark Swannie	22 Golden Poppy Dr. Coto De Caza CA 92679	Ultrasonic object detectors for use on vehicles;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

An ultrasonic ranging method for measuring a distance to an object in an air includes the steps of generating a first and a second primary ultrasonic waves having a frequency f1 and f2, respectively, transmitting the first and the second primary ultrasonic waves in a same direction, wherein a secondary ultrasonic wave having a frequency corresponding to the difference of two frequencies fd=f1?f2 is created by a nonlinear property of the air and radiated to the object, detecting an echo pulse of the secondary ultrasonic wave reflected from the object, and measuring the distance to the object based on a propagation time of the secondary wave.