Experimental Study on Sensing of Ion-exchange Polymer Metal Composite in Uniform Flow
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摘要: 离子聚合物金属复合材料IPMC(Ion-exchange polymer metal composite,IPMC)具有驱动和传感功能。本文利用IPMC的传感能力,设计了一种海流速度信息传感器,基于3种模型分别使用ANSYS和MATLAB软件对不同条件的情况进行仿真,并设计测试系统进行实验,分析验证了片状IPMC在均匀流速下的传感能力。研究结果表明:片状IPMC的初始稳定电压以及测量灵敏度均与材料面积正相关;随着流速的增大,IPMC达到稳定输出电压的时间缩短,且材料输出电压在达到稳定前与时间呈现二次多项式函数关系,函数最大值即为实验所测得的稳定输出电压;各组次实验的重复性良好。
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关键词:
- 离子交换聚合金属材料 /
- 传感特性 /
- 均匀流速 /
- 输出电压
Abstract: Ion exchange polymer metal composite (IPMC) has both driving and sensing functions. In this paper, based on the sensing ability of IPMC, an ocean current velocity information sensor is designed. Based on the three models, ANSYS and MATLAB software are used to simulate different conditions. A test system was designed to analyze and verify the sensing ability of the IPMC under uniform flow rate. The results show that: the initial stable voltage and measurement sensitivity of IPMC are positively correlated with the material area; the time for IPMC to reach the stable output voltagewith the increasing of flow rate is shortened; before reaching the stable output voltage, the output voltage is a quadratic polynomial function with time, and the maximum value of the function is the measured stable output voltage; the repeatability of each group of experiments is good. -
表 1 在25 ℃条件下各介质的密度和黏度
介质 密度/( kg·m−3) 黏度 /(Pa·s) 海水 1070 0.8949 × 10−3 酒精 785.06 1.2 × 10−3 油 850 0.05 表 2 IPMC的样品数据
样品号 厚度h/mm 长a/mm 宽b/mm 流向夹角α/( °) 1 0.2 30 5 90 2 0.2 30 10 90 3 0.2 30 10 60 4 0.2 30 10 30 表 3 基于不同环境介质的各模型输出电压
介质 流速/
(m·s−1)输出电压/mV 1 2 3 海水 0.01 2.84 2.27 2.45 0.10 4.95 4.88 4.74 1.00 13.65 13.31 13.77 10.00 30.87 30.45 30.65 酒精 0.01 1.31 1.05 1.13 0.10 1.84 1.82 1.77 1.00 13.33 13.01 13.46 10.00 25.66 25.31 25.48 油 0.01 1.51 1.21 1.31 0.10 2.28 2.24 2.18 1.00 16.36 15.95 16.50 10.00 27.78 27.41 27.59 表 4 基于不同尺寸、流向夹角的IPMC的各模型输出电压
流体速度/
(m·s−1 )样品号 输出电压/mV 1 2 3 0.01 1 2.84 2.27 2.45 2 1.25 1.49 1.42 3 0.92 1.14 1.08 4 0.63 0.81 0.66 0.10 1 4.95 4.88 4.74 2 11.72 11.69 11.57 3 4.54 4.51 4.47 4 3.06 3.04 3.01 1.00 1 13.65 13.31 13.77 2 23.92 23.89 24.84 3 19.60 19.58 20.35 4 13.72 13.70 14.24 10.00 1 30.87 30.45 30.65 2 53.98 53.38 53.22 3 39.48 39.04 38.92 4 22.34 22.09 22.02 表 5 不同介质下的输出电压u和流速v的关系
介质 模型1 模型2 模型3 海水 u = −0.8553v2 +
11.314v + 3.2483u = −0.8585v2 +
11.3385v +
2.9141u = −0.9050v2 +
11.8228v +
2.9171酒精 u = −1.1067v2 +
13.5479v + 0.8531u = −1.0902v2 +
13.3614v +
0.7166u = −1.3613v2 +
14.0911v +
0.6979油 u = −1.4048v2 +
16.7259v + 1.0010u = −1.3813v2 +
16.4708v +
0.8375u = −1.4399v2 +
17.0755v +
0.8301表 6 不同材料长宽比下的输出电压u和流速v的关系
a/b 模型1 模型2 模型3 6 u = −0.8553v2 +
11.3148v + 3.2483u = −0.8585v2 +
11.3385v +
2.9141u = −0.9050v2 −
11.8228v +
2.91713 u = −1.5962v2 +
20.8470v + 5.1221u = −1.5859v2 +
20.6722v +
5.2433u = −1.7080v2 +
21.8934v +
5.0858表 7 不同流向夹角下的输出电压u和流速v的关系
α 模型1 模型2 模型3 30° u = −1.1777v2 +
13.9051v +
1.0551u = −1.1679v2 +
13.7734v +
1.1472u = −1.2422v2 +
14.5227v +
1.015060° u = −1.5893v2 +
19.6804v +
1.6070u = −1.5797v2 +
19.528v +
1.7165u = −1.6762 v2 +
20.4928v +
1.615690° u = −1.5962v2 +
20.8470v +
5.1221u = −1.5859v2 +
20.6722v +
5.2432u = −1.7080v2 +
21.8934v +
5.0858表 8 IPMC材料尺寸
样品编号 厚度h/mm 长a/mm 1 0.2 30 2 0.2 30 表 9 1号IPMC测得数据
电压u/ mV 流速v /(m·s−1) 时间t /s 16.1 0 0 17.6 0.01 66.7 27.4 0.10 22.5 表 10 2号IPMC测得数据
电压u /mV 流速v /(m·s−1) 时间t/ s 9.7 0 0 12.4 0.01 50.0 14.2 0.1 25.0 表 11 IPMC样品输出电压的模拟计算值与实验值对照
a×b
流速/
(m·s−3)电压
变化值/mV模拟值/
mV误差/ % 30×10 0.01 1.5 5.33 71.86 5.45 72.48 5.31 71.75 0.10 11.3 7.19 57.16 7.29 55.01 7.26 55.65 30×5 0.01 2.7 3.36 19.64 3.03 10.89 3.04 11.18 0.10 4.5 4.37 2.97 4.04 11.39 4.09 10.02 -
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