In this paper, a simple design of a short-range non-inductive capacitance-type level sensor which is developed for closed tanks (like fuel tanks of vehicles) is proposed. The level sensor is analytically and experimentally verified for measuring the level of non-conducting liquids. Second-generation current conveyor (CCII) based interface circuit is used to measure the capacitance of the level sensor which gives output in the form of frequency. The developed capacitance-based level measurement system is simple in design, low-cost and it is found that the error in the measurement of a level is very small in the range of 0.04% for a non-conducting liquid level from 10 to 145 mm of the sensor length.

中文翻译：

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使用基于 CCII 的接口的电容式液位测量系统的性能增强

在本文中，提出了一种针对封闭式油箱（如车辆油箱）开发的短程无感电容式液位传感器的简单设计。液位传感器经过分析和实验验证，可用于测量非导电液体的液位。基于第二代电流传送器 (CCII) 的接口电路用于测量液位传感器的电容，并以频率形式输出。开发的基于电容的液位测量系统设计简单，成本低，发现液位测量误差非常小，对于10-145 mm的非导电液位在0.04%范围内传感器长度。