Method and apparatus for hard object detection

Details Method and apparatus for hard object detection Method and apparatus for hard object detection

1990-10-26

1992-01-07

Melius, Terry Lee

Crop threshing or separating

Means responsive to a sensed condition

Foreign material

460 3, 56 104, 56 108, 56DIG15, A01D 7518, A01F 1216

Patent

active

050786458

ABSTRACT:
A thin film highly directional audible sound sensor is mounted within a rotatable feed roll of a forage harvester to detect the presence of stones and other hard foreign objects in a crop material being fed past the feed roll to a cutter mechanism. Air-borne sound waves produced by the impact of foreign objects on metal parts of the harvester are detected by the sensor which produces a signal for stopping the crop feed mechanism before the foreign objects reach the cutter mechanism. The sensor is mounted on a stationary support within the rotatable feed roll. Output signals from the sensor control a stop mechanism for the crop feed mechanism via conductors extending through a stationary support shaft for the feed roll, thereby avoiding the need to commutate output signals from the detector.

REFERENCES:
patent: 3889249 (1975-06-01), Bennett, Jr. et al.
patent: 3959953 (1976-06-01), Garrott
patent: 3972156 (1976-08-01), Bennett, Jr. et al.
patent: 4193248 (1980-03-01), Gilleman
patent: 4261161 (1981-04-01), Colgrove et al.
patent: 4275546 (1981-06-01), Bohman et al.
patent: 4290255 (1981-09-01), Martenas
patent: 4353199 (1982-10-01), Chow et al.
patent: 4433528 (1984-02-01), Bohman
patent: 4720963 (1988-01-01), Weiss et al.
Machine Design, Oct. 23, 1986, pp. 105-110.

Affiliated with

Also associated with

Rating

Method and apparatus for hard object detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for hard object detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for hard object detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-818289