Elevator Bus Controller Group Polling for Response Speed
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Solution Overview
Problem
Existing communication systems for elevators are either overly complex or too slow to efficiently manage specific functions, necessitating an improved communication system that balances complexity and speed.
Innovation Solution
A communication system for elevators that incorporates a bus controller and multiple bus nodes, where the bus controller periodically sends requests to groups of bus nodes and receives responses, allowing for flexible and adaptable polling frequencies based on sensor urgency levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional communication systems are used for elevators, then system complexity is reduced, but communication speed and response frequency become too slow for specific functions
Solution Approach 1:
The system segments bus nodes into different groups based on sensor urgency levels. The bus controller selectively polls different groups at different frequencies, allowing critical sensors to be queried more frequently while non-critical sensors are polled less often. This segmentation enables faster communication for urgent functions without requiring all nodes to communicate at maximum speed, thus improving overall communication speed without proportionally increasing system complexity.
Solution Approach 2:
The communication system implements dynamic polling frequencies where the bus controller adapts the request frequency to different bus node groups based on their urgency levels. Critical sensors receive more frequent polling requests while non-critical sensors are polled less frequently. This dynamic adjustment optimizes communication speed for time-sensitive operations without maintaining uniformly high complexity across all system components.
2Adaptability or versatility
If uniform polling frequency is applied to all bus nodes, then system simplicity is maintained, but responsiveness to urgent sensor data is reduced
Solution Approach 1:
The system applies local quality by assigning different polling frequencies to different groups of bus nodes based on their specific urgency requirements. Critical sensors (e.g., safety-related) are polled at high frequencies while non-critical sensors are polled at lower frequencies. This localized differentiation improves adaptability to various urgency levels without requiring complete system redesign, as each group is optimized independently based on its specific needs.
3Productivity
If all bus nodes are polled frequently, then response frequency is increased, but system resource consumption and complexity increase
Solution Approach 1:
The system applies partial action by polling only the necessary subset of bus nodes at high frequencies rather than all nodes. Critical sensor groups receive frequent polling to ensure rapid response, while non-critical groups are polled less frequently. This selective approach increases the effective response frequency for urgent functions without the resource consumption and complexity that would result from uniformly polling all nodes at maximum frequency.
Data Source
AI summary
The communication system according to one embodiment for an elevator comprises a bus controller and a plurality of bus nodes. The bus controller periodically sends requests to all bus nodes and receives the responses from the bus nodes. The bus nodes receive requests from the bus controller and send responses to the bus nodes. The bus controller is designed to select a group of bus nodes for each of its requests and to wait for the responses of these bus nodes between two requests.