Why is the infrared camera flashing?

Why does the infrared camera appear flickering? When the illumination intensity is lower than the threshold, the infrared lamp turns on. Closes above the threshold. The situation when the illumination intensity is slightly lower than the threshold: the photosensitive element detects that the illumination intensity is slightly lower than the threshold value, controls the infrared lamp to turn on and emits light, and the detected illumination is increased (plus the infrared light that is reversed back) after the infrared lamp emits light, and When the threshold value is exceeded, controlling the infrared lamp to turn off causes the detected illumination to decrease, and the infrared lamp is turned on again. This does not stop, causing the image to flicker.

Why does the infrared camera appear to flicker? Then how to solve this problem?

The ambient illumination detected by the photosensitive element is slightly lower than the threshold, which is a problem. There are two situations:

First, at a certain time in the evening, for a short time, this problem arises. If we do not want to increase the cost, we should use general mindsets. Our idea is to explain the reasons to users and tolerate it.

Second, this issue must be resolved when the lighting intensity is stable.

1. Change the threshold.

In the same model, the thresholds are also different and there is a discrepancy. The problem may be solved by replacing a product.

Manufacturers provide products with different design thresholds for replacement.

Products with higher threshold design parameters are less likely to flicker.

2, using high-quality low illumination with backlight compensation anti-glare camera film, especially special IR lens;

In addition, when a person or other object near an infrared camera reflects infrared light, the detected illuminance changes repeatedly, causing flicker. For example, when doing demo tests, inspections, and the installation position of the camera is low, when an object covers the camera at close range.

This is not a problem. When the infrared camera is in the normal installation position, this phenomenon will naturally disappear. As a demonstration, just pay attention not to direct infrared light from a very close distance back to the photosensitive element.

3, change the environment

Change the intensity and angle of lighting.

A slight change in the installation angle of the infrared camera, moving up and down, the illuminance detected by the detector will change a lot, it will leave the vicinity of the threshold, so as to solve the problem of flicker.

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