Telemetry instrumentation for acceleration track test system

A special purpose telemetry system was developed to transmit data from a test vehicle moving on a mostly enclosed multiple curved track. The test vehicle contained a multipole switch, whose contacts were actuated at different acceleration levels. Acceleration profile wave shape and switch closure information was transmitted to a telemetry receiving station from the track (total length 110 ft 33.5 m) by means of a magnetic field coupler. Problems encountered during the design of the magnetic field coupler and telemetry system are discussed. An analog simulation of a noise problem encountered during the testing phase is also described. The results of the simulation are used to aid in the solution of the problem.