Ultrasonic wave echo-type switch

Details Ultrasonic wave echo-type switch Ultrasonic wave echo-type switch

1976-12-09

1978-12-26

Farley, Richard A.

Communications: electrical

Selective

340 3E, G01S 966

Patent

active

041318722

ABSTRACT:
An echo-type switch using ultrasonic wave for detecting any object present in a predetermined area with reliable operation irrespective of environmental variations or foreign waves. After the wave is once radiated, the detection is suspended for a fixed time period T.sub.1 and presence or absence of reflected wave received is confirmed during another period T.sub.2. If reflected wave is received in the period T.sub.2, this period is again set for further confirming if the received wave continues and, until absence of the received wave is confirmed after several times of the waves received during the period T.sub.2, next ultrasonic wave is not radiated. Only in case the reflected wave received continues for more than two of the periods, the presence of the object to be detected in the area is indicated.

REFERENCES:
patent: 3474400 (1969-10-01), Auer, Jr. et al.
patent: 3500302 (1970-03-01), Moss, Jr. et al.

Affiliated with

Also associated with

Rating

Ultrasonic wave echo-type switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultrasonic wave echo-type switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic wave echo-type switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1131025