Method of measuring the angular deflexion in a dynamometer
M. Axson, J M Magarshack · Journal of Scientific Instruments · 1960
In the method to be described, unidirectional square-wave current pulses are produced with a mark-to-space ratio proportional to the deflexion of the spring system in a dynamometer. The pulses are fed to a moving-coil meter which has a sufficiently slow response to read the mean current. The reading is then proportional to the deflexion. Two systems for producing the square-wave pulses are discussed. The first is robust and simple in construction and can be applied when the forces to be measured are large. The second system can be used for the measurement of small forces where it is undesirable to make any physical contact with the dynamometer.