Abstract
A cross-capacitance liquid level sensor is based on the principle of cross capacitance. This study designed a new single-tube cross-capacitance fuel-level sensor. The fuel-level measurement model is established for a single-tube cross-capacitive sensor, and the relationship between the measured liquid level and sensor output capacitance is derived. The characteristics of the sensor were tested experimentally. The experimental results demonstrate that the linearity error of the liquid-level sensor of the single-tube calculation for the spacecraft is ±0.48%, the repeatability error is ±0.47%, and the hysteresis error is ±0.68%. The cross-capacitive fuel-level sensor developed in this study can be used in the fuel tank of spacecrafts owing to its low weight and high precision.
Highlights
As a reference for impedance, cross-capacitance is the highest measurement level in the field of electromagnetic metrology, except for quantum voltage and quantum resistance
Cross-capacitance can be used in the development of new sensors owing to less error sources and high stability
New sensors based on cross-capacitance principle can replace conventional capacitive sensors
Summary
As a reference for impedance, cross-capacitance is the highest measurement level in the field of electromagnetic metrology, except for quantum voltage and quantum resistance. Cross-capacitance can be used in the development of new sensors owing to less error sources and high stability. Real-time and accurate measurement of the liquid level of the spacecraft fuel tank can ensure the optimal utilization of propellants, while ensuring the normal and safe operation of spacecraft engines This has considerable practical significance for improving the effective carrying capacity and efficiency of rockets [9]. Cross-capacitance is used to develop new sensors owing to its advantages of fewer error sources and high stability [10,11]. The characteristics of theliquid sensor are model is established forand the sensor developed sensor, and the relationship between the measured level experimentally tested, and theis linearity, repeatability, and of hysteresis ofare theexperimentally designed sensor are and sensor output capacitance derived. The linearity, repeatability, and hysteresis of the designed sensor are examined
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