Current Direction Element for Safety-Critical Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for electrical actuation of safety-critical systems are costly due to complex manufacturing and installation requirements, involving multiple switches and terminals, which complicates reliable scanning of connection patterns and increases circuitry and software outlay.
Innovation Solution
A device with at least two terminals, one switch, and a current direction element that allows unidirectional or bidirectional current flow between terminals for different operating states, enabling precise identification of states through distinct potentials, and optionally featuring redundant design with multiple switches and current direction elements to distinguish multiple states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If six switches and six terminals are used to achieve three different switching states, then the connection patterns can be reliably scanned, but the manufacturing and installation complexity increases significantly
Solution Approach 1:
The patent extracts and eliminates redundant switches and terminals from the system. By using only two terminals instead of six, and employing current direction elements (diodes) to replace multiple switches, the invention removes unnecessary components while preserving the ability to distinguish three switching states through bidirectional/unidirectional current flow patterns.
Solution Approach 2:
The invention changes the parameter of current flow direction (bidirectional vs. unidirectional) to encode switching states. Instead of using multiple switches to create different connection patterns, the system uses the directionality of current flow between two terminals to represent different states, thereby reducing component count while maintaining state discrimination capability.
2Adaptability or versatility
If six electric terminals and six electric lines are provided for connection, then three different switching states can be represented, but the circuitry and software outlay increases
Solution Approach 1:
The two terminals in the invention serve multiple functions: they carry current in different directions to represent different switching states, and their potential differences are used for scanning and identification. This multi-functionality eliminates the need for separate terminals for each switching state, reducing the overall system complexity while maintaining full adaptability.
Solution Approach 2:
Instead of using multiple terminals to represent different states directly, the invention inverts the approach by using a single pair of terminals with current flowing in different directions (bidirectional vs. unidirectional) to encode the switching states. This inversion reduces the number of terminals and connected lines from six to two, significantly lowering circuitry and software requirements.
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 solution simplifies the electrical actuation of safety-critical systems by reducing complexity and enhancing redundancy, allowing safe and reliable determination of operating states and enabling error detection and control, thus improving system security and reducing costs.
Implementation Method 1
at least one current direction element is provided so that for at least one of the at least two operating states a unidirectional current flow occurs between the at least two terminals
Data Source
AI summary
For a device for the electrical actuation of a safety-critical system, having at least two terminals, at least one switch, an operator control element, by means of which at least two operating states for the system are selectable, by means of which switching positions of the at least one switch are determined, it is proposed that at least one current direction element is provided, so that for at least one of the at least two operating states a unidirectional current flow occurs between the at least two terminals.