Browse Prior Art Database

Force Source and Impact Force Calibration

IP.com Disclosure Number: IPCOM000076865D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Lyon, RL: AUTHOR [+3]

Abstract

A simple reliable and quantitative source of force, to simulate, for example, the impact of print hammers striking during printing operations, can be obtained by the use of a pendulum provided with a suitable accelerometer. The device may also be used to dynamically calibrate force transducers.

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Force Source and Impact Force Calibration

A simple reliable and quantitative source of force, to simulate, for example, the impact of print hammers striking during printing operations, can be obtained by the use of a pendulum provided with a suitable accelerometer. The device may also be used to dynamically calibrate force transducers.

The arrangement comprises a suitable back plate or mounting, not shown, to which a support or pivot 3 is affixed in such manner, as by slotted fittings, so that it may be moved to selected horizontal and vertical positions, as indicated by the X and Y coordinate arrows.

A mass 5 is suspended from the pivot 3, to swing in the plane of the drawing. The suspension element 7 is preferably a section of rigid coaxial cable of appropriate dimensions, having a central conductor indicated by the dotted line 9. An accelerometer element 11, of any suitable type, is attached to mass 5, and is electrically connected to appropriate instrumentation, not shown, utilizing the coaxial cable, which acts as the pendulum suspension, as the electrical conductive path from the accelerometer, as will be apparent from the drawing. The use of the rigid coaxial cable, therefore, performs the double purpose of acting as a suitably flexible pendulum suspension, which adds appropriate damping to the suspension, and also as a channel for the accelerometer output signals. It is sufficiently rigid to control the path of the impacting mass, elements 5 and 11.

The p...