High Pressure Tank Leakage Detection Using Concentration Sensors
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Solution Overview
Problem
High pressure tank apparatuses with resin-made liners face challenges in accurately distinguishing between temporary release fluid and leaked fluid during normal operation, leading to potential false judgments of abnormal leakage.
Innovation Solution
Incorporating a concentration sensor and pressure sensor to differentiate between temporary release fluid and leaked fluid based on internal pressure thresholds, with the control section using the sensors' data to accurately determine if a leak has occurred, thereby avoiding false alarms during normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a storage section and detection sensor are used to detect leaked fluid, then leakage detection capability is improved, but false judgment occurs when temporary release fluid is detected during normal operation
Solution Approach 1:
The patent changes the detection parameter from simple fluid presence detection to concentration-based detection. By measuring the concentration of fluid in the storage section and comparing it against threshold values, the system can distinguish between temporary release fluid (lower concentration) and leaked fluid (higher concentration), thereby eliminating false judgments while maintaining reliable leakage detection
Solution Approach 2:
The patent introduces concentration as an intermediary parameter between fluid detection and leakage judgment. Instead of directly judging leakage based on fluid presence, the system uses concentration measurement as an intermediate step to differentiate between normal temporary release and abnormal leakage, improving judgment accuracy
2Measurement precision
If concentration sensor and pressure sensor are added to differentiate fluid types, then judgment accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes the storage section serve multiple functions: it stores both temporary release fluid and leaked fluid, and also acts as the detection chamber for the concentration sensor. This multi-functionality reduces the need for separate detection chambers or additional structural components, thereby limiting the increase in device complexity despite adding concentration and pressure sensors
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the accuracy of leakage judgment by correctly identifying leaks during abnormal conditions while preventing false alarms during normal operation, ensuring the durability of the high pressure tank by effectively managing fluid release and storage.
Implementation Method 1
a concentration sensor that detects a concentration of the fluid inside the storage section
Implementation Method 2
a pressure sensor that detects an internal pressure of the high pressure tank
Implementation Method 3
in the case where an internal pressure detection value of the high pressure tank obtained by the pressure sensor is greater than a sensor selection threshold value, judging whether or not the leaked fluid has occurred, based on a detection result of the concentration sensor, and in the case where the internal pressure detection value is less than or equal to the sensor selection threshold value, judging whether or not the leaked fluid has occurred, based on a detection result of the pressure sensor
Data Source
AI summary
A high pressure tank of a high pressure tank apparatus includes: a resin-made liner; a reinforced layer covering an outer surface of the liner; and a supplying/discharging hole to which a supplying/discharging flow path is connected via a connecting section. A storage section is capable of storing a leaked fluid that has leaked from the connecting section and a temporary release fluid that has been led out from between the liner and the reinforced layer. A control section, when an internal pressure detection value of the high pressure tank due to a pressure sensor is greater than a threshold value, judges whether the leaked fluid has occurred, based on a detection result of a sensor detecting a concentration of a hydrogen gas inside the storage section, and otherwise does based on a detection result of the pressure sensor.