Without the mounting of a rotary encoder for the engine, a crank angle signal of 360 pulses/revolution can be generated in real-time by multiplying the output from the position sensor on the plate/crank vehicle parts.
The amount of belt displacement can be measured using this output timing as a measurement trigger signal.
A crank position pulse multiplier is something which converts the signal from a crank position sensor to the equivalent output of a 360p/r encoder. Experimental measurements in engine combustion testing. For example, take measurements by mounting an optical encoder on the crankshaft. But instead of a newly mounted optical encoder, by taking measurements using the signal from the crank position sensor on an actual vehicle, which is then input to an ECU, mounting an optical encoder is not necessary.