Surgical Robot Motion Enable Circuit for Misoperation Prevention
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Solution Overview
Problem
Existing robotic-assisted surgical systems rely on sensors to detect operator intentions, which cannot prevent misoperations caused by software failures or other single failures, leading to potential hazards during surgical procedures.
Innovation Solution
An operation enable control system that utilizes two independent control loops of software control and hardware signal to activate a motion enable state for the automated surgical device, incorporating a logic AND circuit, a control device, and a switch element to ensure reliable power supply management and prevent unexpected misoperations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If emergency stop switch is used to prevent unexpected movement, then the operator can stop the device, but this step requires more response time and hazard may have already occurred
Solution Approach 1:
The system requires preliminary action in the form of deliberate switch activation before the automated driving system can enter motion enable state. This preliminary hardware confirmation ensures that the operator has consciously intended to activate the system before it becomes operational, preventing unexpected movement from the outset rather than requiring corrective action after movement has begun.
Solution Approach 2:
The hardware control loop with switch element serves as a preliminary anti-action mechanism that prevents unintended operation before it can occur. By requiring deliberate manual activation through the switch, the system proactively counteracts potential harmful actions from software failures or sensor errors, rather than relying on reactive emergency stopping after hazardous movement has already begun.
Data Source
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AI summary
An operation enable control system and a robotic-assisted surgical device with the operation enable control system are disclosed. The operation enable control system includes a control device, a switch element and a logic AND circuit; the control device comprises an input terminal and an output terminal, and the input terminal of the control device is connected with a robotic-assisted surgical system; a terminal of the switch element is connected with an external power supply system, and another terminal of the switch element is connected with an automated driving system of the robotic-assisted surgical system; the logic AND circuit comprises a first input terminal and a second input terminal, the first input terminal of the logic AND circuit is to obtain a sensor status of the robotic-assisted surgical system, the second input terminal of the logic AND circuit is connected with the output terminal of the control device, an output terminal of the logic AND circuit is connected with a control terminal of the switch element, the logic AND circuit performs a logical AND operation on signals received by the first input terminal and the second input terminal, and a result of the operation is output to control on and off of the switch element.