Industrial radio remote controller

Abstract

The invention discloses an industrial wireless remote control comprising a transmitter and a receiver, wherein the transmitter includes a baseband containing a micro-processor and a transmitting passage containing a frequency synthesizer, the receiver comprises the baseband containing a micro-processor and a receiving passage containing a frequency synthesizer, both the transmitter and the receiver futher include a wideband receiver and are designed as a double core structure containing a digital signal processor, the frequency synthesizers of the transmitter and the receiver use direct digital frequency synthesizers formed by phase accumulators, D / A converters and low pass filters. The invention has an excellent anti-interference performance, especially co-channel interference resistance, safe and reliable work, strong aseismatic performance, can satisfy operation of an industrial device under various complex conditions.

Description

technical field [0001] The invention relates to an industrial wireless remote controller. Background technique [0002] The industrial wireless remote control is used for remote control of industrial equipment. It usually consists of a transmitter and a receiver. The transmitter and receiver of the current industrial wireless remote control still use simplex working mode, and the transmission channel of the transmitter adopts MSK and FM Secondary modulation scheme: the subcarrier modulation adopts the MSK system, the local oscillator in the transmitter adopts a phase-locked frequency synthesizer, and the baseband adopts a single core (a microprocessor). The transmitter completes the scanning of the button switch by the microprocessor in the baseband, forms a serial instruction code, and performs channel coding on the instruction to form a transmitted data stream; Carrier MSK modulation; after the MSK modulation signal is filtered, linear FM modulation is performed to finall...

AI Technical Summary

Problems solved by technology

The main defect of this kind of remote control is the poor anti-interference performance, especially the poor anti-interference performance of the same frequency. Since the transmitter and receiver adopt simplex working mode, when the receiver has interference, the transmitter cannot perform interference discrimination and automatic replacement. channel, and there are disadvantages such as slow channel replacement

Therefore, when there is co-channel interference on the working channel, the interference cannot be eliminated or the interference channel cannot be exited

At the same time, the local oscillators in the receiver and transmitter use a phase-locked frequency synthesizer with poor anti-vibration characteristics, and the frequency change is slow (usually it takes about 80ms to change a channel)

As all kinds of industrial equipment become more and more complex, the control accuracy requirements are getting higher and higher, and the situation that several devices use several remote controls at the same time will continue to appear, so the current industrial remote control can no longer meet the requirements of industrial remote control. needs

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