Automatic Milking Machine Control Locking for Safe Remote Operation
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Solution Overview
Problem
Automatic milking machines face safety issues due to potential personal injury risks when remotely controlled, and dual control interfaces can lead to uncertainty about the effectiveness of control commands and parameter settings.
Innovation Solution
A control system that locks the milking machine into single-control mode, ensuring operations are exclusively managed by a single control source, either the local user interface or a remote terminal, with visual and acoustic indicators to reflect the operation mode, and status data transmission to remote terminals to prevent unauthorized control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If remote control interfaces are provided for automatic milking machines, then operational flexibility and efficiency are improved, but safety risks increase due to potential personal injury when operators are near the machine during remote control
Solution Approach 1:
The control system dynamically switches between single-control mode and dual-control mode based on operational requirements. In single-control mode, only one interface (local or remote) can control the machine at a time, preventing conflicting commands and improving safety. In dual-control mode, both interfaces are available but with restrictions on critical functions. This dynamic adaptation resolves the contradiction by providing flexibility when needed while maintaining safety through mode-specific constraints.
Solution Approach 2:
The system changes the operational parameters of control interfaces by implementing a lock mechanism that prevents certain control functions from being executed when in dual-control mode. Specifically, control commands related to cluster attachment/detachment and machine movement are blocked when both local and remote interfaces are active, while non-critical functions remain accessible. This parameter change approach maintains operational flexibility for monitoring and non-critical tasks while eliminating safety risks associated with simultaneous control.
2Ease of operation
If dual control interfaces are provided, then operational flexibility is improved, but reliability decreases due to uncertainty about whether control commands are actually effected at the machine
Solution Approach 1:
The system implements comprehensive feedback mechanisms that provide real-time status information to operators about the actual state of the milking machine and whether their control commands have been executed. The feedback system includes visual indicators on both local and remote interfaces that show current operational mode, command status, and machine state. This feedback ensures operators can verify command effectiveness, resolving the reliability concern while maintaining dual-interface flexibility.
Solution Approach 2:
Before allowing control commands to be executed, the system performs preliminary checks to determine which control interface has priority based on the current operational mode. In single-control mode, the active interface is predetermined and locked, so operators know in advance that their commands will be executed. In dual-control mode, the system checks whether the commanded action is permitted before execution, providing preliminary confirmation to the operator about command effectiveness.
3Reliability
If single-control mode locking is implemented, then safety and predictability are improved, but device complexity increases due to lock/unlock mechanisms and mode management
Solution Approach 1:
The control system uses a universal lock mechanism that can be activated from either the local or remote interface, and that locks out the other interface. This multi-functional approach means the same locking logic and indicator system handle both single-control and dual-control mode transitions, reducing the need for separate complex control paths. The lock mechanism serves multiple purposes: preventing conflicting commands, indicating active control source, and managing transition between operational modes, thereby reducing overall system complexity.
Solution Approach 2:
The system uses visual indicators (such as color-coded lights or display elements) to clearly indicate the current operational mode and which control interface is active. For example, different colors may indicate single-control mode versus dual-control mode, or which interface currently has control priority. This visual feedback simplifies the user's understanding of system state without requiring complex interface changes, and provides intuitive guidance for safe operation while reducing the cognitive load associated with mode management.
Data Source
AI summary
A control unit that controls an automatic milking machine to operate in accordance with control commands and/or parameter settings received from either of a local user interface fixedly arranged at the milking machine or a remote terminal, where the control unit, in response to receiving a lock command from one of the local user interface or the remote terminal, causes the automatic milking machine to operate in a single-control mode in which it operates exclusively to commands and/or parameter settings received from the one of the local user interface or the remote terminal that generated the lock command, in order to ensure predictable and safer operation of the milking machine particularly in view of personnel located in proximity of the milking machine.