Wireless Communication Route Selection for Stacker Crane Safety
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Solution Overview
Problem
Existing wireless communication systems often establish connections unintentionally when power is turned on, leading to unforeseen consequences, and lack control over operation modes, which can result in unexpected operations and instability.
Innovation Solution
A method for establishing wireless communication that requires specific conditions to be met before establishing a second wireless communication route, including the industrial machine being in manual operation mode, registered communication partners, and no existing connections, with separate communication routes for emergency signals to ensure reliability and prevent unintended operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If automatic pairing is performed when power is turned on, then wireless communication can be established quickly, but unintended connections and unexpected operations may occur
Solution Approach 1:
The system performs preliminary registration of communication partners and operation modes before actual wireless communication establishment. The machine-side communication device stores advance determination results about whether manual operation mode is active and whether a partner is registered, so that when a connection request arrives, the system can quickly verify these pre-checked conditions without delaying the connection process.
Solution Approach 2:
The patent introduces an intermediary verification mechanism where the machine-side communication device acts as a mediator that checks connection establishment conditions (manual operation mode status and partner registration) before allowing wireless communication to be established. This intermediary check prevents unintended connections while maintaining efficient connection establishment when conditions are met.
2Productivity
If wireless communication is established without checking operation mode, then connection speed is improved, but unexpected machine operations may occur
Solution Approach 1:
The system determines and stores the operation mode (manual or automatic) in advance before wireless communication establishment. The machine-side communication device holds this determination result, allowing it to quickly verify whether manual operation mode is active when a connection request arrives, preventing unexpected operations while maintaining fast connection speed.
Solution Approach 2:
The patent applies preliminary anti-action by pre-determining the operation mode and storing this information before connection establishment attempts. This pre-established knowledge allows the system to immediately reject connection requests when automatic operation mode is active, preventing harmful unexpected operations before they can occur.
3Reliability
If connection establishment conditions are strictly checked, then system safety is improved, but connection establishment complexity increases
Solution Approach 1:
The patent extracts the complexity of connection establishment condition checking from the connection request handling process itself. Instead of implementing complex verification logic during connection establishment, the system separates the determination of conditions (manual operation mode status, partner registration) into independent pre-checks performed by the machine-side communication device, which stores these determination results for quick reference during connection attempts.
Data Source
AI summary
A portable operation interface transmits an instruction to switch an operation mode to a stacker crane with an automatic operation mode and a manual operation mode via a first wireless communication route. A second receiver is connected to the stacker crane. For example, a portable operation interface including a portable remote controller wirelessly transmits to the second receiver a connection request to establish wireless communication in the second wireless communication route. The second wireless communication route is a different route from the first wireless communication route. The second receiver that receives the connection request determines whether a first condition that the stacker crane is in the manual operation mode is satisfied. The second receiver establishes wireless communication via the second wireless communication route with the portable operation interface when it is determined that the first condition is satisfied.