Roller shutter door remote control system, generally roller shutter door remote control system is divided into two parts of transmission and reception, the transmission part is generally divided into two types, namely remote control and transmission module, remote control and remote control module is for the way of use, the remote control can be used independently as a whole machine, and the external lead line has a terminal pile head. The remote control module is used as a component in the circuit and is applied according to its pin definition. The receiving part can also be divided into two types, namely superheterodyne and super-regenerative receiving mode, super-regenerative demodulation circuit is also called super-regenerative detection circuit, which is actually a regenerative detection circuit working in intermittent oscillation state.
As far as the receiving part of the door remote control is concerned, it can be divided into two ways: superheterodyne and superregeneration. The super-regenerative demodulation circuit, also known as the ultra-regenerative detection circuit, is actually a regenerative detection circuit in an intermittent oscillating state. The superheterodyne demodulation circuit is similar to the superheterodyne radio, which is to set up a local oscillation circuit to generate an oscillation signal, mix with the received carrier frequency signal, and the obtained intermediate frequency signal is amplified and detected by the intermediate frequency, and then demodulated out the data signal. These two methods are often used in the configuration of the roller shutter remote control.
Superheterodyne demodulation circuit is the same as superheterodyne radio, it is set up a local oscillation circuit to generate an oscillation signal, mixed with the received carrier frequency signal, obtained an intermediate frequency (generally 465kHz) signal, through the intermediate frequency amplification and detection, demodulated out of the data signal.
In the configuration of the remote control can be divided into infrared remote control and wireless remote control, they are due to different carriers, infrared remote control is the use of infrared to transmit control signals, characterized by directionality, no obstruction in the middle, the distance is generally not more than 7 meters, and will not be affected by electromagnetic interference, TV remote control is used more is infrared remote control. Radio remote control is the use of radio waves to transmit control signals, characterized by non-directionality, there is a shield in the middle can also be controlled, the control distance is long, but it is susceptible to electromagnetic interference. It is very practical where long-distance penetration is required.
