Remote control is a device used to remotely control machinery
Modern remote control is mainly composed of integrated circuit boards and used to generate different messages (message definition in communication: it is composed of a group of interrelated meaningful symbols, which can express a complete meaning of information.) Composed of buttons.
The bus door remote controller uses the latest technology to encode and decode, and controls the door pump solenoid valve in a flashing way to open and close the automatic door. It is used to remotely open and close the doors of passenger cars (buses and medium buses) to avoid the trouble that drivers need to get on and open the doors every time. The main element of the transmitting part of the remote controller is an infrared light emitting diode. It is actually a special LED. Because its internal material is different from ordinary led, when a certain voltage is applied at both ends, it emits infrared rather than visible light. Influencing factors editing and broadcasting.

The main factors affecting the remote distance of RF remote control are as follows

Transmit power
Large transmitting power leads to long distance, but it consumes large power and is easy to produce interference;

Receiving sensitivity
The receiving sensitivity of the receiver is improved, and the remote control distance is increased, but it is easy to be disturbed, resulting in misoperation or out of control;

Antenna
Linear antennas are used, which are parallel to each other and have a long remote control distance, but occupy a large space. Lengthening and straightening the antenna in use can increase the remote control distance;height.The higher the antenna, the farther the remote control distance, but limited by objective conditions;stop

The wireless remote controller
used uses the UHF frequency band specified by the state. Its propagation characteristics are similar to that of light, with linear propagation and small diffraction. If there is a wall block between the transmitter and the receiver, the remote control distance will be greatly reduced. If it is a reinforced concrete wall, it will be even more affected due to the absorption effect of the conductor on the radio wave.