High-Pressure Container Pressure Monitoring Under Sensor Abnormality
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Solution Overview
Problem
High pressure container systems face reliability issues when a pressure sensor abnormality is detected, as estimated measurements are not sufficiently reliable, leading to potential decreases in system operation reliability.
Innovation Solution
A high pressure container system with an upstream pressure sensor and multiple downstream pressure sensors, where the control device monitors internal pressure using measured values from both sets of sensors, switching to redundant upstream sensor measurements when a downstream sensor abnormality is detected to maintain reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second pressure sensor is not made redundant and operations are continued by estimating its measured value from the first pressure sensor, then the system can continue operating without stopping, but the reliability of operations based on estimated values is insufficient
Solution Approach 1:
The system performs preliminary abnormality detection of the second pressure sensor before estimating its measured value. By detecting abnormalities in advance through comparison with the first pressure sensor's measured value, the system can switch to using the first pressure sensor's data, thereby maintaining both operational continuity and measurement reliability
Solution Approach 2:
The system establishes a feedback mechanism where the first pressure sensor's measured value is used to verify the normality of the second pressure sensor. When an abnormality is detected, the system switches to using the first pressure sensor's feedback data for control decisions, ensuring reliable operation continuity
2Reliability
If multiple pressure sensors are used to monitor internal pressure, then reliability is maintained during sensor abnormalities, but the device complexity increases
Solution Approach 1:
The first pressure sensor, originally positioned upstream of the pressure regulating valve, is made multi-functional by using it for both its original pressure monitoring function and as a backup for the second pressure sensor. This universal usage of the first pressure sensor provides redundancy without adding new hardware components
Solution Approach 2:
The system creates a functional copy of the second pressure sensor's measurement capability by utilizing the first pressure sensor's measured value. When the second sensor fails, the first sensor's data serves as a copy, providing redundant measurement information without duplicating the physical sensor hardware
Data Source
AI summary
A high pressure container system is equipped with an upstream side pressure sensor that measures an internal pressure of high pressure containers upstream of a pressure regulating valve, a plurality of downstream side pressure sensors that measure the pressure of the fluid downstream of the pressure regulating valve, and a control device. At a normal time of the downstream side pressure sensors, a control device monitors the internal pressure of the high pressure containers on the basis of the measured values of the downstream side pressure sensors, and at an abnormal time when any one of the downstream side pressure sensors is abnormal, the control device monitors the internal pressure of the high pressure containers on the basis of the measured values of the downstream side pressure sensors, and the measured value of the upstream side pressure sensor.