Hydrogen Tank Temperature Sensor Drift Detection via Reference Comparison
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Solution Overview
Problem
Temperature sensors in hydrogen tanks can malfunction, leading to inaccurate measurement of internal tank temperature, which can result in incorrect calculation of remaining gas quantity and potential exceeding of threshold temperature limits during filling operations.
Innovation Solution
A fuel gas station with a first temperature acquiring unit for the tank's internal temperature, a second unit for the supplied fuel gas temperature, a calculation unit to determine the temperature difference, and an operation control unit that adjusts fuel flow or quantity based on a predetermined threshold, ensuring accurate temperature determination and preventing excessive filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is disposed in the inside of a hydrogen tank to measure temperature, then temperature management can be performed during filling operation, but the temperature sensor may malfunction due to drift leading to inaccurate temperature measurement
Solution Approach 1:
The patent introduces a reference temperature sensor disposed in the hydrogen station as an intermediary reference point. By comparing the temperature sensor in the hydrogen tank with this reference sensor, the system can detect drift and malfunctions in the tank sensor without requiring direct access to the tank for calibration.
Solution Approach 2:
The system continuously compares the temperature readings from the tank sensor with the reference sensor and provides feedback to the control unit. When a discrepancy exceeds a predetermined threshold, the system generates an abnormality determination, enabling real-time monitoring and correction of sensor drift.
2Reliability
If the temperature of the inside of the hydrogen tank is used to control filling operation, then the threshold limit temperature can be maintained, but incorrect temperature measurement may cause premature termination or excessive filling
Solution Approach 1:
The control unit continuously monitors the temperature sensor output and compares it with the reference temperature sensor. When the difference exceeds a predetermined threshold, the system determines abnormality and adjusts or terminates the filling operation, preventing both premature termination and excessive filling.
Solution Approach 2:
The system establishes a predetermined threshold value for temperature difference before filling begins. This pre-set cushioning mechanism prevents incorrect operations by stopping the filling process before dangerous conditions can develop, accounting for potential sensor drift.
3Device complexity
If only the temperature sensor in the hydrogen tank is used for temperature determination, then the system is simple, but the correctness of temperature information cannot be verified
Solution Approach 1:
The patent introduces a reference temperature sensor disposed in the hydrogen station as an intermediary reference point. By comparing the temperature sensor in the hydrogen tank with this reference sensor, the system can detect drift and malfunctions in the tank sensor without requiring direct access to the tank for calibration.
Solution Approach 2:
The system creates a reference copy of the temperature measurement environment by placing a reference temperature sensor in the hydrogen station. This reference copy allows verification of the tank sensor's accuracy without directly interfering with the tank's internal conditions.
Data Source
AI summary
A fuel gas station, a fuel gas filling system, and a fuel gas filling method which can check whether information on temperature of the inside of a fuel tank is correct, so that a fuel tank is properly filled. The fuel gas station calculates a difference of temperature between a temperature of the inside of the fuel tank and a temperature of fuel gas to be supplied to the fuel tank after supplying of fuel gas for a predetermined length of time. When the calculated difference of temperature exceeds a predetermined threshold value, the fuel gas station determines that the information on temperature of the inside of the fuel tank is abnormal, and reduces at least one of supply flow and supply quantity of fuel gas as compared to when such information is normal.