Method for diagnosing failure of flowmeter in measuring machine and hydrogen filling device

A method for diagnosing a failure of a flowmeter in a measuring machine, comprising:

• measuring a filling amount of hydrogen gas during filling by using a flowmeter in a case that a tank of a vehicle powered by the hydrogen gas is filled with the hydrogen gas;
• calculating a filling amount of the hydrogen gas into the tank from the measuring machine by using a pressure, a temperature, and a volume of the tank during the filling;
• and
• comparing the filling amount calculated and the filling amount measured at a same timing during the filling, determining whether or not the flowmeter fails according to a comparison result, and outputting a result.

A hydrogen filling device comprising:

• a measuring machine configured to measure a filling amount of hydrogen gas by using a flowmeter when a tank of a vehicle powered by the hydrogen gas is filled with the hydrogen gas;
• a reception circuit configured to receive information of a pressure, a temperature, and a volume of the tank;
• a filling amount calculation circuit configured to calculate a filling amount at an end of filling of the hydrogen gas into the tank from the measuring machine by using the pressure, the temperature, and the volume of the tank;
• a storage device configured to store a plurality of error values between a metering filling amount at the end of filling measured using the flowmeter and a calculated filling amount at the end of filling calculated using the pressure, the temperature, and the volume of the tank, the plurality of error values being based on a plurality of past performance data;
• a determination circuit configured to determine whether or not the flowmeter fails by using the plurality of error values based on the plurality of past performance data stored in the storage device and an error value at the end of filling of the hydrogen gas at a present time;
• and
• an output circuit configured to output an alarm indicating a failure of the flowmeter.

A hydrogen filling device comprising:

• a measuring machine configured to measure a filling amount of hydrogen gas during filling by using a flowmeter when a tank of a vehicle powered by the hydrogen gas is filled with the hydrogen gas;
• a filling amount calculation circuit configured to calculate a filling amount of the hydrogen gas into the tank from the measuring machine by using a pressure, a temperature, and a volume of the tank during the filling;
• a determination circuit configured to compare the filling amount calculated and the filling amount measured at a same timing during the filling and to determine whether or not the flowmeter fails according to a comparison result;
• and
• an output circuit configured to output an alarm indicating a failure of the flowmeter during the filling of the hydrogen gas, in a case that it is determined that the flowmeter fails.