Advantages and Disadvantages of Infrared Rangefinders
We have introduced the characteristics of infrared rangefinders, so what are the disadvantages of infrared? Comparison brings harm. Compared to ultrasonic rangefinders, let's take a look at the advantages and disadvantages of infrared rangefinders.
Firstly, active infrared ranging is achieved by actively illuminating and utilizing the infrared light reflected by the target from the infrared source. Active infrared night vision technology is a night vision technology that uses observation, and the corresponding equipment is an active infrared night vision device. Passive infrared night vision technology is an infrared technology that uses the infrared radiation emitted by the target itself to achieve observation. It discovers the target based on the temperature difference or thermal radiation difference between the target and the background or various parts of the target. Its equipment is a thermal imager. Thermal imaging devices have unique advantages that set them apart from other night vision devices, such as being able to work in foggy, rainy, and snowy weather, having a long operating range, and being able to recognize camouflage and resist interference. They have become a focus of development for night vision equipment abroad and will to some extent replace low light night vision devices. But its cost is also very high.
Secondly, infrared ranging is fast because the principle of infrared ranging is that one infrared LED emits light, and then another infrared receiver tube measures the intensity of the infrared light! When the sun shines, the intensity of the light is immediately at its maximum, and then the intensity decreases when there are obstacles. The indoor light intensity is directly proportional to the distance, but slightly inversely proportional outdoors, so the program runs incorrectly.
Thirdly, the disadvantage of infrared rangefinders is that the intensity of light returned by different surfaces is different. The data returned by black is much higher than that of white background, so the intensity of light and distance may not be completely proportional. As the material is changed, the corresponding relationship is also changed.
