Industrial Wireless System Frequency Hopping for Noise Interference
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Solution Overview
Problem
Industrial facilities face challenges with signal line disconnection risks and limited design freedom due to extensive wiring requirements for movable parts, which hinders the integration of intelligent systems.
Innovation Solution
An industrial wireless communications system that enables wireless connection and communication between a master device and slave devices using a broadcast system with frequency hopping, reducing the risk of signal line disconnection and improving design flexibility by utilizing a 2.4 GHz band with low power transmission to minimize noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is used for movable parts, then the risk of signal line disconnection is reduced, but interference from noise sources increases
Solution Approach 1:
The patent changes the frequency parameter of wireless communication to 2.4 GHz, which is higher than the noise frequencies generated by industrial equipment (power supply lines, robots, welding guns, motors). This frequency parameter change allows the communication signal to operate in a less noisy environment, reducing the harmful effects of noise interference while maintaining connection reliability
2Reliability
If extensive wiring is used to connect control devices, then communication coverage is improved, but design freedom and installation flexibility are reduced
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system. Instead of using physical signal lines and power cables to connect control devices to movable parts, the system uses wireless signals transmitted at 2.4 GHz frequency. This substitution eliminates the constraints of physical wiring, thereby improving installation flexibility and design freedom while maintaining communication coverage through wireless signal propagation
3Reliability
If wireless communication power is increased to overcome noise, then communication reliability is improved, but interference with other communication equipment increases
Solution Approach 1:
The patent changes the frequency parameter to 2.4 GHz, which is higher than the noise frequencies from industrial equipment. This frequency selection allows the system to achieve reliable communication without increasing transmission power, because the signal operates in a frequency range less affected by noise. Consequently, the system maintains communication reliability while minimizing interference with other communication equipment in the same area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces signal line disconnection risks and enhances design freedom in industrial facilities by ensuring reliable wireless communication with movable parts, allowing for faster setup and reduced interference with other communications.
Implementation Method 1
connection processing and transmission and reception of signals are carried out wirelessly between the master wireless device, which is connected to a computer (for example, a PLC or the like), and slave wireless devices installed in various hardware devices
Data Source
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AI summary
An industrial wireless communications system (10) includes a PLC (12) that performs at least monitoring within an industrial facility, at least one master wireless device (18) connected to the PLC (12) by a fieldbus (16), a plurality of slave wireless devices (22), which are installed corresponding to respective hardware devices (20), and carry out wireless communications with the master wireless device (18), a connection processing unit (30) that carries out a connection process wirelessly between the master wireless device (18) and the slave wireless devices (22), and a transmission/reception processing unit (36) that transmits and receives data wirelessly between the master wireless device (18) and the slave wireless devices (22).