Photoelectric sensor is photoelectric components as the test components, widely used in the field of automation. Photoelectric sensor can be used for material handling, error detection, processing, manufacturing automation, can also be used to long distance object detection or fault detection. Photoelectric sensor has a unique advantage in the object distance detection, but there will be some technical problems in the specific use environment, this needs us organized technical judgment.

In the application of photoelectric sensors to detect the distance between the objects, the problems many users use is no output signal after photoelectric sensors to detect objects, subsequent data analysis. Average person see no signal output tend to some wrong judgment of sensors, such as some people because of the judge is the sensor working directly. But in fact is not like that, no output after photoelectric sensors to detect objects, the reason may have a lot, we need to step by step to do.

The first thing to consider is the problem of connection or configuration. For correlation type photoelectric sensor must be used by cast light and by light combination, both sides need to power supply; And regression reflection type must be used by the sensor probe and regression reflection plate; At the same time, the user must provide stable power supply to the sensor, if the dc power supply, must confirm is negative, if is no negative connection error will lead to the output signal.

The analysis of the causes of the above consideration of photoelectric sensor itself, we also need to consider is the location of the test object, if the test object is not in the detection area, the detection is futile. Detection object must, in the area of the sensor can detect namely photoelectric can sense range. Did next, want to consider sensor optical axis alignment problem, correlation type cast light and the light of the optical axis must be aligned, the corresponding regression reflection type probe and reflector optical axis must be aligned. Also consider the inspection object whether accord with a standard object or the minimum standard, inspection object can not be less than the minimum standard of the object, so as to avoid causing correlation type and reflection type cannot very good detection of transparent objects, like reflective has asked to test the color of the object, the deeper the color, the detection distance is closer.

Can clearly make out if the above situation, we need to do is test environment interference factors. Such as light intensity can't exceed the rated range; If the field environment with dust, we need to regular cleaning photoelectric sensor probe surface; Or is closely to install multiple sensors, interfere with each other; Still have a kind of influence is less electrical interference, if there is a high power equipment around, the disturbance when must have the corresponding anti-interference measures. If done the given above, these factors can be explicitly excluded or no signal output, suggested that returned to the factory inspection judgement.