Failure determination system, failure determination method, control device, and program
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Solution Overview
Problem
Gas concentration sensors may issue false alarms due to deterioration, making it difficult to determine whether the sensor failure or actual gas concentration is the cause, leading to unnecessary alerts.
Innovation Solution
A system comprising a gas concentration sensor, ventilation equipment, and a control device that receives alarm issuance information and determines sensor failure after a ventilation completion time, allowing remote assessment of sensor functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gas concentration sensor is used for a long time, then the sensor accumulates usage experience, but the sensor deteriorates and produces false alarms
Solution Approach 1:
The system performs preliminary actions by automatically activating ventilation equipment when an alarm is detected, and then determining sensor failure after the ventilation completion time has elapsed. This preliminary action sequence allows the system to address potential false alarms proactively by establishing a predetermined response protocol that distinguishes between actual gas concentration issues and sensor deterioration before final failure determination is made.
2Loss of information
If the gas concentration sensor issues an alarm, then safety monitoring is performed, but it is difficult to determine whether the alarm is due to actual gas concentration or sensor failure
Solution Approach 1:
The control device serves as an intermediary between the gas concentration sensor and the ventilation equipment. It receives alarm issuance information from the sensor, controls the ventilation equipment based on this information, and determines sensor failure after the ventilation completion time has elapsed. This intermediary role allows the system to systematically process alarm information and distinguish between actual gas concentration issues and sensor failures without requiring direct complex interaction between the sensor and ventilation system.
3Measurement precision
If remote determination of sensor failure is implemented, then unnecessary alarms are reduced, but system complexity increases
Solution Approach 1:
The system implements feedback by controlling the ventilation equipment based on alarm issuance information received from the gas concentration sensor, and then determining sensor failure after the ventilation completion time has elapsed. This feedback mechanism allows the control device to continuously monitor the relationship between alarm events and ventilation responses, progressively improving failure detection accuracy by learning from the system's own operational responses to alarm conditions.
Data Source
AI summary
A failure determination system (100) according to the present disclosure includes a ventilation equipment (2); a gas concentration sensor (1) that outputs a detected value corresponding to a gas concentration, issues an alarm on the basis of the detected value, and transits alarm issuance information; and a control device (3). The control device (3) includes a communication unit (31) which receives alarm issuance information, a ventilation control unit (32) which controls the ventilation equipment (2) to execute a ventilation operation on the basis of the alarm issuance information, and a determination unit (33) which determines whether the gas concentration sensor (1) fails on the basis of the alarm issuance information.