CALIBRATION METHOD FOR CAPACITANCE LEVEL SENSING APPARATUS AND ANTI-INTERFERENCE METHOD FOR PLURAL CAPACITANCE LEVEL SENSING APPARATUSES

摘要

A calibration method for a capacitance level sensing apparatus (10) is applied for a tank measurement. A measurement signal generating circuit (102) generates a measurement signal (104) to proceed with the tank measurement. According to a measurement result measured through the measurement signal (104), a sensing circuit (108) transmits a sensing signal (110) to a control unit (112). According to the sensing signal (110), the control unit (112) determines whether the sensing signal (110) is in an effective range or not. If the sensing signal (110) is in the effective range, the control unit (112) sets a total capacitance in accordance with the sensing signal (110) as a measurement base value. If the sensing signal (110) is not in the effective range, the control unit (112) controls the measurement signal generating circuit (102) to adjust a measurement frequency of the measurement signal (104).

主权项

1. A calibration method for a capacitance level sensing apparatus (10) applied for a tank measurement, the calibration method comprising:
a. a measurement signal generating circuit (102) generating a measurement signal (104) to proceed with the tank measurement; b. according to a measurement result measured through the measurement signal (104), a sensing circuit (108) transmitting a sensing signal (110) to a control unit (112); c. according to the sensing signal (110), the control unit (112) determining whether the sensing signal (110) is in an effective range or not; d. if the control unit (112) determines that the sensing signal (110) is in the effective range, the control unit (112) setting a total capacitance in accordance with the sensing signal (110) as a measurement base value; and e. if the control unit (112) determines that the sensing signal (110) is not in the effective range, the control unit (112) controlling the measurement signal generating circuit (102) to adjust a measurement frequency of the measurement signal (104) until the sensing signal (110) is in the effective range, and then the control unit (112) controlling the measurement signal generating circuit (102) to stop adjusting the measurement frequency of the measurement signal (104).