What are the common failures of on-board hydrogen sensors, and what is the solution?

        Common failures of on-board hydrogen sensors include:

        1. Abnormal signal output: The sensor's internal components may be aging or damaged, resulting in unstable or incorrect output signals.

        2. Slow response: the sensor response time is prolonged, and it cannot quickly reflect the change of hydrogen concentration.

        3. Zero drift: After the sensor is used for a long time, the reference point (zero point) changes, resulting in deviation of the measurement results.

        4. Decreased sensitivity: Long-term exposure to high concentrations of hydrogen or harsh environments may reduce the sensitivity of the sensor.

        5. Circuit fault: power supply problem or internal circuit damage, resulting in the sensor can not work normally.

        For the above faults, the following solutions can be taken:

        1. If the signal output is abnormal: check whether the cable connecting to the sensor is damaged and try to replace the sensor or calibrate it. If the problem persists, you may need to replace the circuit board or the sensor itself.

        2. Slow response: Check whether the sensor needs to be cleaned or replaced, and whether there is too much dust or pollutants in the surrounding environment. Sometimes, recalibrating the sensor can also solve the response speed problem.

        3. Zero drift: zero calibration is carried out regularly to ensure that the reference value of the sensor is accurate. If the drift is severe, a professional may be required to correct or replace the sensor.

        4. Sensitivity loss: Sensitivity recovery test, such as cleaning gas by purging or using calibration gas. If it cannot be restored, consider replacing the sensor.

        5. Circuit fault: First check the power connection of the sensor to ensure normal power supply. Use a multimeter to check that all parts of the circuit, including the cell voltage, are within the normal range (for example, about 2.3V). Repair or replace damaged power supply or circuit parts.

        Note: Before performing any repair or calibration operations, ensure that you have read and understood the sensor's manual and safety guidelines, and if necessary, have professional technicians handle it to ensure safety and effectiveness.