Infrared emission tubes (IRLEDs), also known as infrared emission diodes, belong to the category of diodes. It is a kind of light-emitting device that can directly convert electric energy into near-infrared light (invisible light) and emit it. Mainly used for various photoelectric switches, touch screens, and remote control transmission circuits. The structure and principle of infrared emission tubes are similar to ordinary light-emitting diodes, except that the semiconductor materials used are different. Infrared light-emitting diodes are usually made of gallium arsenide (GaAs), Aluminium arsenide gallium (GaAlAs) and other materials, and are packaged with transparent or Baby blue or black resin.

Scope:

Infrared emission tube emission distance, emission angle (15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees), emission light intensity, and wavelength. The above are physical parameters, and it is necessary to understand their electrical performance parameters: commonly used low-power infrared emission tubes with diameters of 3mm and 5mm in the market, and high-efficiency high-power emission tubes with diameters of 8mm and 10mm. The forward voltage of the low-power emission tube is 1.1-1.5V, the current is 20mA, the maximum forward voltage rate is 1.4-1.65V50-100mA, and the forward voltage of the high-power emission tube is 1.5-1.9V200-350mA. Yuxing Electronics produces 1-10W high-power infrared emission tubes, which can be applied to infrared monitoring and lighting.

Principles of infrared tube recognition and infrared ranging system:

When you first come into contact with an infrared tube, it's not easy to distinguish between transmitting and receiving. Here is a simple recognition method. Infrared emission tubes and infrared receiver tubes are commonly referred to as infrared pair tubes. The shape of the infrared pair tube is similar to that of a regular circular light-emitting diode. It's just that the internal structure is different.

Infrared ray constitutes a tube. Assuming (a) is an infrared emission tube with a concave inner core, its shape is similar to a condenser. Similarly, (b) is an infrared receiving tube with an infrared photosensitive electrode inside the tube core. The length of the two pins 1 of the infrared tube is 1, and the long pin is the positive electrode, which is the same as a regular light emitting tube.

Because of its simple structure, small size and low cost, the infrared Distance measuring equipment is widely used in the mass production of opto mechatronics products. The system mainly consists of infrared tubes. This article will focus on the principle of an infrared distance measurement system based on an infrared pair tube.

The principle is that the infrared emitting diode of the infrared emitting circuit emits infrared light, which is reflected by an obstacle. The photosensitive receiving tube of the infrared receiving circuit receives the reflected light of the object in front of it to determine whether there is an obstacle. The obstacle ahead. The distance of the target can be determined by the intensity of the reflected light. Due to the variation of the light intensity received by the receiving tube with distance, the reflected light is strong when close, and weak when far away.

Due to the fact that infrared is an electromagnetic wave between visible light and microwave, it not only has the linear propagation, reflection, refraction and other characteristics of visible light, but also has some characteristics of microwave, such as strong penetration and the ability to penetrate some opaque materials. Substances, etc

According to the principle of infrared tube operation, infrared sensors include infrared emitting devices and infrared receiving devices. Objects in nature emit infrared radiation as long as their temperature is above zero. Therefore, infrared sensors must have strong transmission and reception capabilities.