Photoelectric sensor has the characteristics of high precision, fast response, non-contact measurement and simple structure. It is widely used in detection and control. Although the forms of photoelectric sensors are flexible and diverse, there are generally some technical problems that need to be further eliminated.

When many users detect objects, the sensor does not display signals. Most people often think that the photoelectric sensor is broken. In fact, this is not the case. Let’s analyze it for you.

The first thing to consider is the wiring or configuration.

For the opposite type photoelectric sensor, it must be combined by the light projection part and the light receiving part, and power supply is required at both ends;

The regression reflection type must be used by the combination of sensor probe and regression reflection plate;

At the same time, the user must provide a stable power supply for the sensor. If it is DC power supply, the positive and negative poles must be confirmed. If the positive and negative poles are connected incorrectly, the output signal will not be.

The above reason analysis is the consideration of the photoelectric sensor itself. We also need to consider the position of the detected object. If the detected object is not in the detection area, such detection is futile. The detected object must be in the area that can be detected by the sensor, that is, the range that can be perceived by photoelectric.

Secondly, whether the optical axis of the sensor is aligned or not should be considered. The optical axis of the projection part and the light receiving part of the opposite reflection type must be aligned, and the optical axis of the corresponding regression reflection type probe part and the reflector must be aligned.

Similarly, we should also consider whether the detection object meets the standard detection object or the minimum detection object standard. The detection object should not be less than the minimum detection object standard, so as to avoid that the reflection type and reflection type can not detect the transparent object well. For example, the reflection type has requirements for the color of the detection object. The darker the color, the closer the detection distance.

If the above conditions are eliminated, the next thing to do is to check the interference of environmental factors.

If the light intensity cannot exceed the rated range;

If there is dust in the on-site environment, we need to clean the surface of photoelectric sensor probe regularly;

Or multiple sensors are closely installed to interfere with each other; Another kind of influence is electrical interference. If there are high-power equipment around, corresponding anti-interference measures must be taken when interference occurs.

If these factors can be clearly eliminated after the above troubleshooting one by one, or there is no signal output, it is recommended to return it to the manufacturer for detection and judgment.
Responsible editor; zl

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