Multi-channel measurement of physical effects by confluent pulse technique, with particular reference to the analysis of strain

Measurement in impedance bridges by pulse excitation is discussed, and an application described in which the indications of ten resistance strain gauges are displayed on a single cathode-ray tube either in waveform or in amplitude. Frequencies of 0¿3000 c/s are resolved, and at maximum sensitivity 1 mm on the screen corresponds to 0.001% strain. The performance of the method of pulse excitation is discussed with particular reference to strain gauges, but impedance gauges can be devised for the measurement of other physical effects.