This paper develops a novel non-intrusive ring-shaped electrostatic coupled capacitance sensor (ECCS) for the parameter measurement of gas-solid flow to eliminate the temperature drift of traditional capacitance sensor and to improve the reliability of velocity measurement. In ECCS, one source electrode and two detection electrodes are housed in a sensing head to simultaneously derive two pairs of capacitance and electrostatic signals, which can achieve the simultaneous measurement of the particle velocity, concentration and mass flow rate within the same sensing space of gas-solid flow system. The effects of the isolation electrodes on the capacitance sensitivity and the temperature drift of the sensor standing capacitance are further investigated. Then, a weighted velocity is determined by fusing the capacitance correlation velocity and the electrostatic correlation velocity based on the correlation coefficients, which are useful for the reliable measurement of gas-solid flow. Finally, experiments are carried out to test the performance of the developed ring-shaped ECCS. Results demonstrate that the developed ECCS triples the capacitance sensitivity for the radial position from -15 mm ∼15 mm. The temperature drift of the capacitance signal is less than 0.075 mV/^oC from the room temperature to 65 ^oC, and thus the sensor standing capacitance is almost impervious to the temperature. After calibrating the relationship between the particle concentration and the capacitance signal, the developed ECCS can measure the particle mass flow rate with a relative error less than ±8%.

本文开发了一种新型的非侵入式环形静电耦合电容传感器（ECCS），用于气固流参数测量，以消除传统电容传感器的温度漂移并提高速度测量的可靠性。在ECCS中，一个源电极和两个检测电极被容纳在一个传感头中，以同时导出两对电容和静电信号，从而可以在同一气体检测空间内同时测量粒子速度，浓度和质量流率。 -固体流系统。进一步研究了隔离电极对电容灵敏度和传感器固定电容温度漂移的影响。然后，通过基于相关系数融合电容相关速度和静电相关速度来确定加权速度，这对于可靠地测量气固流是有用的。最后，进行实验以测试开发的环形ECCS的性能。结果表明，开发的ECCS在-15 mm到15 mm的径向位置上的电容灵敏度是原来的三倍。电容信号的温度漂移小于0.075 mV / 结果表明，开发的ECCS在-15 mm到15 mm的径向位置上的电容灵敏度是原来的三倍。电容信号的温度漂移小于0.075 mV / 结果表明，开发的ECCS在-15 mm到15 mm的径向位置上的电容灵敏度是原来的三倍。电容信号的温度漂移小于0.075 mV /^ø从室温至65℃ ^Ò C，并且因此传感器站在电容几乎是不可渗透的温度。在校准了颗粒浓度和电容信号之间的关系之后，开发的ECCS可以测量颗粒质量流率，相对误差小于±8％。