Dynamic Error Detection Time for Obstacle Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing obstacle detecting apparatuses using bus topology struggle to quickly and accurately detect communication errors, often resulting in delayed error reporting or false alarms due to fixed error determination times.
Innovation Solution
Implementing a dual error determination time period, where the first error determination time is shorter for initial communication and longer for subsequent communications, allowing for rapid detection of communication errors at startup while minimizing false reports of temporary errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed error determination time is used for all communication phases, then the system structure is simple, but communication errors cannot be detected quickly at startup and false alarms occur during temporary errors
Solution Approach 1:
The error determination time is changed from a fixed value to a dynamic value that varies according to the communication phase. During the initial communication phase, a first error determination time is used, and during subsequent communication phases, a second error determination time is used. This dynamic adjustment allows the system to detect errors quickly at startup while avoiding false alarms during temporary errors, thereby improving detection accuracy without requiring complex additional hardware.
Solution Approach 2:
The error determination time parameter is changed based on the communication phase. The system sets a first error determination time for initial communication and a second error determination time for subsequent communication. This parameter change enables the system to adapt to different communication conditions, achieving quick error detection at startup while reducing false alarms during temporary communication interruptions.
2Reliability
If a long error determination time is used, then false alarms are reduced, but communication errors are not reported quickly
Solution Approach 1:
The error determination time is dynamically adjusted based on the communication phase. During the initial communication phase, a shorter first error determination time is used to quickly detect errors and report them promptly. During subsequent communication phases, a longer second error determination time is used to avoid false alarms during temporary errors. This dynamic adjustment resolves the contradiction between quick error detection and reduced false alarms.
Solution Approach 2:
The system performs preliminary communication to establish a baseline for normal communication before applying the longer error determination time. During this initial phase, the system learns the communication characteristics and then switches to the second error determination time, which is optimized for avoiding false alarms while maintaining timely error detection for actual errors.
3Loss of time
If a short error determination time is used, then communication errors are detected quickly, but false alarms occur during temporary errors
Solution Approach 1:
The error determination time is dynamically changed according to the communication phase. A shorter first error determination time is used during initial communication to detect errors quickly, while a longer second error determination time is used during subsequent communication to avoid false alarms. This dynamic adjustment allows the system to achieve both quick error detection and high detection accuracy.
Solution Approach 2:
The communication process is segmented into an initial communication phase and subsequent communication phases. Different error determination times are applied to different segments: a shorter time for the initial phase to enable quick detection, and a longer time for subsequent phases to reduce false alarms. This segmentation allows the system to optimize error detection for each phase's specific requirements.
Data Source
AI summary
An obstacle detecting apparatus includes sensors and a control device. The sensors detect an obstacle and are connected to the control device through a bus. The control device includes communication error determination and detection means. The communication error determination means determines an occurrence of a communication error if communication with the sensors is impossible for a preset error determination time period. The communication error detection means detects the communication error. The communication error determination means sets in advance, as the error determination time period, a preset first error determination time period in the case of the first communication with the sensors and a preset second error determination time period in the case of communication with the sensors after the first communication with the sensors is normally performed. The first error determination time period and the second error determination time period are set so as to be different.