This device is used for the detection of intensive, non-uniform light that typically arises by reason of arc welding and laser works of metallic work pieces. This device detects the existence as well as the non-existence of an arc and is made for error detection for automatic manufacturing processes. The system consists of the evaluation device ILD-1000 and the sensor IR-M12VA.
The system reacts to non-uniform (modulated) light in the infrared range. Therefore insensitivity to daylight and artificial ambient light is ensured. The device detects modulated light in frequency range of approximately 50 Hz to 1000 Hz only. The incoming signal is filtered and added up for a specific period of time. If the appropriate value exceeds a predetermined value then the switching output will be activated.
The switching threshold can be set via potentiometer. The period of filtering is 4-fold switchable via a DIP switch. The measuring range is 2-fold switchable for low and high illuminations. Furthermore an impulse stretching of 100 ms for the switching output can be activated via another DIP switch.
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