What is the sensor of the laser cutting machine?
The laser cutting head incorporates a sensor that automatically adjusts the height when encountering uneven obstacles or changes in the workpiece shape. This constant distance between the cutting head and the workpiece surface allows for efficient material processing without constant supervision. In both domestic and international applications, capacitive displacement sensors are commonly used. These sensors are designed to be compatible with the processing head, featuring a detection signal processing unit. Displacement measurement is a fundamental task in this context.
Displacement sensors can be categorized into two types based on their interaction with the workpiece: contact and non-contact sensors. Non-contact sensors offer several advantages over their contact counterparts. They provide high resolution, quick dynamic response, and minimal hysteresis error, sometimes even down to zero. It is due to these characteristics that non-contact sensors are preferred in laser cutting applications. By ensuring accurate and precise measurements, these sensors contribute to enhanced processing efficiency.
Proximity sensors, also known as non-contact sensors, were initially designed as proximity switches that trigger a switch signal when an object is detected at close proximity to the sensor probe. However, modern proximity sensors have evolved to not only detect the mere presence of an object, but also measure the distance between the object and sensor probe, providing valuable information about the shape and spatial position of the workpiece. These sensors can also be used to measure the displacement of moving objects, which is why they are also referred to as non-contact displacement sensors. Popular types of displacement sensors include hysteresis and contraction displacement sensors, eddy current displacement sensors, capacitive displacement sensors, and inductor displacement sensors, among others.