Elevator Brake Monitoring Circuit with Grouped Opening Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing holding brake monitoring systems in elevators are inefficient due to the need to scan output signals from each micro switch, which occupies a large number of ports in the judgment circuit, limiting the number of micro switches that can be configured and increasing costs.
Innovation Solution
A holding brake monitoring circuit system that pairs opening sensors into working groups to generate output signals for judging the status of holding brakes, reducing the number of ports required and improving monitoring efficiency by grouping sensors rather than scanning individual signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual micro switch output signals are scanned to monitor holding brake status, then monitoring accuracy is maintained, but the number of ports required in the judgment circuit increases significantly
Solution Approach 1:
The patent combines multiple micro switch output signals into a single monitoring line by using a shared circuit path. The holding brake assembly with multiple brakes (e.g., four brakes) connects their micro switches in parallel to a common monitoring circuit, allowing all brakes to be monitored through one port instead of requiring separate ports for each micro switch. This merging approach reduces the number of ports needed in the judgment circuit while maintaining the ability to detect the status of all holding brakes.
2Reliability
If individual micro switch signals are scanned sequentially, then all holding brakes can be monitored, but monitoring efficiency decreases
Solution Approach 1:
The patent implements continuous monitoring by connecting all holding brake micro switches to a shared monitoring circuit that operates simultaneously rather than sequentially. The circuit continuously detects the status of all holding brakes at the same time through the common monitoring line, eliminating the need for sequential scanning. This allows the system to maintain constant surveillance of all brakes, improving monitoring efficiency while ensuring reliable fault detection across all holding brakes in the assembly.
Data Source
AI summary
A holding brake monitoring circuit system, an elevator system, and a holding brake monitoring method. The holding brake monitoring circuit system includes a plurality of opening sensors corresponding to holding brakes, wherein the number of the opening sensors is an even number greater than 3, and the opening sensors are configured to be paired to form at least two working groups, and each of the working groups is configured to output an output signal for judging status of the holding brake(s).