In-die measurement represents one of the most important advances in stamping technology. Proper implementation is the key to realizing the potential of this technology. This means selecting the right sensor, mounting it securely in the right place, and wiring it to minimize the possibility of damage and electrical noise. Analog sensors are ideal for in-die measurement. Unlike a digital sensor's output that trips when the target reaches a specific distance from the sensor, an analog sensor's output tracks the target parameter within its sensing range, changing as the target's characteristics --distance, pressure, temperature, etc. --change. For in-die measurement, an analog sensor that measures distance is called a displacement sensor, of which there are three types: Linear-variable-differential-transformer (LVDT) sensors, analog proximity sensors and laser-displacement sensors. Here, we'll focus on analog proximity sensors.
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