Промышленные сенсорные мониторы имеют множество сенсорных методов. Обычными являются емкостные, резистивные и инфракрасные датчики. Однако информации об инфракрасных сенсорных мониторах относительно мало. Сегодня я познакомлю вас с инфракрасными сенсорными мониторами. Преимущества и характеристики и ситуация применения.
The advantage of the infrared touch screen is that it can be touched with a finger, a pen, or any object that can block light. The disadvantage of the infrared touch screen is that it does not feel good when used on a spherical display. This is because the infrared grating matrix that depends on the work obviously requires to be on the same plane. Therefore, the working plane that really senses touch has a larger distance from the curved display screen. Space, especially at the corners, but this shortcoming does not exist on flat-panel displays, such as liquid crystal displays.
It can be said that infrared touch screens have considerable advantages when used on flat-panel displays. Infrared detection technology can obtain a simple infrared detection method by using infrared emitting tube and infrared receiving tube (infrared pair tube for short) of the same wavelength:
As long as there is an object blocking the connection between the infrared pair of tubes, the received signal will drop sharply. Therefore, infrared can detect the blocking of objects and is widely used in anti-theft systems, automatic sensing systems, counters and other systems.
If infrared is applied in a short distance, the degree of blocking can be detected according to the attenuation of the received signal. This is the so-called analog method. The analog method uses a dense array of receiving tubes at the receiving end and can also be used for contrast imaging; to prevent interference, infrared detection is also Pulse method can be used,
That is, the infrared transmitting tube emits a fixed frequency signal, and the receiver only detects this frequency, and the pulse mode has a very strong anti-interference ability. If the pulse mode modulates the signal at the working frequency, it can also be used for digital communication. This is the famous infrared communication. The remote control of household appliances, the infrared communication of computers, and even the fastest optical fiber communication today are all due to this. Infrared communication has no effect on the human body.
