ULTRASONIC DETECTORS MEASURING ULTRASONIC

Brand	Owner	Address	Description
SYNCROCRAFT	SyncroCraft	16225 Camino Del Sol Los Gatos CA 95032	Ultrasonic detectors for measuring ultrasonic pressure;SYNCRO CRAFT;Consulting in the field of engineering; Design and testing of new products for others;
	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.