Ultrasonic label sensor
esp-4
microsonic
With a rapid pulse sequence, an ultrasonic transmitter beams upwards against the backing material. The effect of the sound pulses inducing the backing material to vibrate is for a markedly weakened sonic wave to be emitted on the opposite side.
The receiver receives this sonic wave and analyses it. The backing material signal level is different to that of the label or splice. And this difference in signal is analysed by the esp-4. The difference between backing material and label and/or between sheeting and splice can be very slight indeed. To ensure certainty with the difference, teach-in for the esp 4 sensor must firstly revolver around the signal level for the backing material/sheeting.
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