Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site zehntel.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!zehntel!zinfandel!joe From: joe@zinfandel.UUCP Newsgroups: net.auto Subject: Re: measuring torque in-situ? Message-ID: <1707@zehntel.UUCP> Date: Fri, 14-Dec-84 19:17:03 EST Article-I.D.: zehntel.1707 Posted: Fri Dec 14 19:17:03 1984 Date-Received: Sun, 16-Dec-84 09:25:22 EST Sender: berry@zehntel.UUCP Organization: Zehntel Automation Systems Inc, Walnut Creek CA Lines: 29 Nf-ID: #R:cornell:-100:zinfandel:3200071:000:921 Nf-From: zinfandel!joe Oct 30 14:47:00 1984 Hi. I suppose that torque could be measured in situ by two magnet and sensors. The magnets would be at opposite ends of the drive shaft rotating past their respective detectors. The RPM of the shaft is avail- able, and by detecting the change in gap between the passage of the two magnets we would have the torsional displacement between the two spots. Given the distance between them on the shaft and the torsional resistance of the shaft cross section we would have both the torque and power output of the system to that point. torque = rotational stiffness * angular displacement ------------------------------------ length power = torque * RPM These would certainly be fun additions to a cars instrument panel. " Cogito ergo Spud. " ( I Think, therefore A Yam. ) Joseph Weinstein Zehntel Inc. (ihnp4!zehntel!zinfandel!joe) P.O. Box 8016 (415)932-6900 Walnut Creek California 94596