UWB Tool Control Network for Low-Latency Factory Communication
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Solution Overview
Problem
Industrial tools used in production chains face communication latency and interference issues due to multi-path phenomena, particularly in environments with metal and human obstacles, which degrade Wi-Fi and other radio communication standards like Zigbee and Bluetooth, leading to unreliable data transmission and control.
Innovation Solution
Implementing an ultra-wide band (UWB) communication network for bidirectional data exchange between tools and anchors, using TDMA standards to alternate control and location information transmission, and combining this with Wi-Fi for high-bandwidth data transfer, optimizing bandwidth and minimizing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Wi-Fi communication is used for data transmission between tools and production management system, then high data transfer speed is achieved, but communication reliability deteriorates due to multi-path interference from metal obstacles and human bodies
Solution Approach 1:
The communication system is segmented into two distinct parts: Wi-Fi for high-speed data transfer and UWB for reliable control commands and location tracking. This segmentation allows each communication protocol to operate in its optimal performance zone, with Wi-Fi handling bulk data and UWB handling critical control functions不受multi-path interference
Solution Approach 2:
The UWB communication acts as an intermediary layer between the tool and production management system for control functions. UWB's time-of-flight measurement capability provides accurate location information that mediates between physical tool position and digital control system, enabling reliable workstation verification independent of Wi-Fi signal quality
2Device complexity
If traditional radio communication standards (Zigbee, Bluetooth) are used in production environments with metal obstacles, then device complexity is reduced, but communication latency increases due to signal interference
Solution Approach 1:
The system changes the fundamental parameter of radio frequency from traditional 2.4GHz (Wi-Fi, Bluetooth, Zigbee) to ultra-wideband frequency range. This parameter change enables signals to penetrate metal obstacles and human bodies more effectively, reducing communication latency in industrial environments while maintaining relatively simple device implementation through standardized UWB modules
3Adaptability or versatility
If tools are moved between different workstations with different radio access points, then production flexibility is improved, but manual parameter reconfiguration is required increasing operation time
Solution Approach 1:
The system implements self-service through automatic workstation identification. When a tool enters a workstation, the anchor automatically detects the tool's presence and retrieves the tool's identifier. The system then automatically configures the appropriate control parameters and establishes communication without requiring manual operator intervention, enabling seamless tool movement between workstations
Data Source
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AI summary
The invention relates to a tool control system (1) comprising at least one tool and at least one fixed anchor (5), the tool being equipped with at least one ultra-wideband radio communication means and a memory. The at least one fixed anchor (5) is equipped with an ultra-wideband radio communication means, a control means, and a memory. The radio communication means of said tool (1) and said at least one anchor (5) communicate bidirectionally, providing control or command information and tool location information. In this way, the ULB network is used not only to determine the tool's location but also to exchange data with it related to its operation. This type of network is less susceptible to radio reflection phenomena and can exchange tool command and control data very quickly.