可定量检测的天线传感器的设计与应用研究
发布时间：2019-04-18 12:39
【摘要】：天线传感器因具有制作简单,体型微小等优点而被广泛研究应用于诸如生物传感器,气体传感器,应变传感器等实例中。但目前关于天线传感器的研究还存在以下问题:1、为获得精准详细的检测数据,通常采用诸如网络分析仪等专业设备进行天线传感器的检测,这种检测方式操作复杂、技术要求高,只适于学术研究;2、使用诸如RFID阅读器、智能手机等轻便设备进行检测虽然操作简单、方便迅速,但大多只能给出定性的检测结果,在无线传感网中的应用有局限性。本论文在使用轻便设备进行检测的工作基础上,研究可定量检测的天线传感器的设计与应用。具体研究内容如下:一、本论文首先设计了基于蓝牙技术的主动式天线传感器。在前人工作的基础上,初步分析了蓝牙信号的传播模型,并提出使用全向性天线的方法解决因空间角度的不确定性而无法简化模型的问题,进一步优化了传播模型,实现了定量检测待测参数的目标。最终得到的定量检测模型为:(,(9)=1)()-109)lg((9)。本论文据此制作了湿度传感器和应变传感器两种传感器,并在实际演示实验中验证了定量检测模型的可靠性。湿度传感器使用铅笔印迹作为敏感材料,定标测试实验中得到的检测函数为:=-38.54-14.507)2)((9)-30.42,误差为±3.59 dBm。从实际的测试结果来看,实验误差要小于理论误差,同时在动态的环境湿度下,也能快速的检测湿度的变化,有力的证明了定量检测函数的可靠性;应变传感器使用S-RGO油墨作为敏感材料,其定标测试实验中得到的检测函数为:??????=-13.35-14.507)2)((9)-27.20,误差为±2.93 dBm。应变传感器设计了四组演示实验,演示实验的检测结果正确反应出了手指弯曲,人体呼吸等动作引起的应力变化情况,并与检测模型完全相符。二、针对被动式传感器,本论文设计了双RFID天线传感器。两个天线一个作为参考标签,一个用于感知检测。本论文详细分析了双天线反馈信号强度的变化情况,并据此建立了反馈信号强度差值与待测参数关系的函数模型。双天线的检测位置相近是工作的前提,通过这种方式可以减小因天线位置差异造成的信号强度差别,最终实现RFID传感器的定量检测。该检测模型为:=2)()。在检测方案的实际应用研究中,本论文设计了基于双RFID天线结构的湿度传感器。湿度传感器的检测函数是:?=-5.94-2.22,误差为±0.40 dBm。从演示实验测试结果来看,?均值的波动变化符合检测模型的理论预期,能较好的检测湿度变化。总体而言,本论文分别从主动式传感器和被动式传感器两个方面入手,为天线传感器的制作提供了两种不同的可定量检测方案。两种定量检测方案都具有良好的可靠性,并可以实际应用在传感器的研制中。论文中可定量检测方案的实现不仅促进了天线传感器在实际生活中的应用,同时也为学术研究中天线传感器的信号模型简化问题提供了新的思路。
[Abstract]:Antenna sensors have been widely used in many applications such as biosensors, gas sensors, strain sensors and so on because of their advantages such as simple fabrication, small size and so on. However, at present, there are still the following problems in the research of antenna sensor: 1. In order to obtain accurate and detailed detection data, professional equipment such as network analyzer is usually used to detect antenna sensor, and the operation of this detection mode is complex. High technical requirements, only suitable for academic research; 2. Using portable devices such as RFID reader, smart phone and other portable devices, although the operation is simple and convenient and quick, most of them can only give qualitative detection results, and the application in wireless sensor networks has its limitations. In this paper, the design and application of the antenna sensor which can be quantitatively detected are studied on the basis of the portable equipment. The main contents are as follows: firstly, the active antenna sensor based on Bluetooth technology is designed in this paper. On the basis of previous work, the propagation model of bluetooth signal is analyzed preliminarily, and the method of omnidirectional antenna is proposed to solve the problem that the model cannot be simplified because of the uncertainty of space angle, and the propagation model is further optimized. The objective of quantificationally detecting the parameters to be tested is achieved. The final quantitative detection model was: (, (9) = 1) ()-109) lg (9). In this paper, two kinds of sensors, humidity sensor and strain sensor, are made, and the reliability of the quantitative detection model is verified in the practical demonstration experiment. The humidity sensor uses pencil imprinting as sensitive material. The detection function obtained in calibration test is: =-38.54 脳 14.507) 2) (9)-30.42, and the error is 卤3.59 dBm.. From the actual test results, the experimental error is smaller than the theoretical error. At the same time, under the dynamic environment humidity, it can also quickly detect the change of humidity, which effectively proves the reliability of the quantitative detection function. The strain sensor uses S-RGO ink as the sensitive material. In the calibration test, the detection function is:? =-13.35? 14.507) 2) (9)-27.20, and the error is 卤2.93 dBm.. Four sets of demonstration experiments have been designed for strain sensors. The results of the demonstration experiments correctly reflect the stress changes caused by finger bending and human respiration, and are in good agreement with the detection model. Secondly, a dual RFID antenna sensor is designed for passive sensor. Two antennas are used as reference tags and one for sensing detection. In this paper, the variation of the two-antenna feedback signal intensity is analyzed in detail, and a functional model of the relationship between the feedback signal intensity difference and the parameters to be measured is established. The close detection position of dual antennas is the premise of work. By this way, the difference of signal intensity caused by antenna position difference can be reduced, and finally the quantitative detection of RFID sensor can be realized. The detection model is: = 2) (). In the practical application of the detection scheme, a humidity sensor based on dual RFID antenna structure is designed in this paper. The detection function of the humidity sensor is:? =-5.94? 2.22, and the error is 卤0.40 dBm.. Judging from the test results of the demonstration experiment,? The variation of the mean value accords with the theoretical expectation of the detection model and can detect the humidity change better. In general, this paper starts with active sensor and passive sensor, and provides two different quantitative detection schemes for antenna sensor. Both of the two quantitative detection schemes have good reliability and can be used in the development of sensors. The realization of quantitative detection scheme not only promotes the application of antenna sensor in real life, but also provides a new way to simplify the signal model of antenna sensor in academic research.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
本文编号：2460047
[Abstract]:Antenna sensors have been widely used in many applications such as biosensors, gas sensors, strain sensors and so on because of their advantages such as simple fabrication, small size and so on. However, at present, there are still the following problems in the research of antenna sensor: 1. In order to obtain accurate and detailed detection data, professional equipment such as network analyzer is usually used to detect antenna sensor, and the operation of this detection mode is complex. High technical requirements, only suitable for academic research; 2. Using portable devices such as RFID reader, smart phone and other portable devices, although the operation is simple and convenient and quick, most of them can only give qualitative detection results, and the application in wireless sensor networks has its limitations. In this paper, the design and application of the antenna sensor which can be quantitatively detected are studied on the basis of the portable equipment. The main contents are as follows: firstly, the active antenna sensor based on Bluetooth technology is designed in this paper. On the basis of previous work, the propagation model of bluetooth signal is analyzed preliminarily, and the method of omnidirectional antenna is proposed to solve the problem that the model cannot be simplified because of the uncertainty of space angle, and the propagation model is further optimized. The objective of quantificationally detecting the parameters to be tested is achieved. The final quantitative detection model was: (, (9) = 1) ()-109) lg (9). In this paper, two kinds of sensors, humidity sensor and strain sensor, are made, and the reliability of the quantitative detection model is verified in the practical demonstration experiment. The humidity sensor uses pencil imprinting as sensitive material. The detection function obtained in calibration test is: =-38.54 脳 14.507) 2) (9)-30.42, and the error is 卤3.59 dBm.. From the actual test results, the experimental error is smaller than the theoretical error. At the same time, under the dynamic environment humidity, it can also quickly detect the change of humidity, which effectively proves the reliability of the quantitative detection function. The strain sensor uses S-RGO ink as the sensitive material. In the calibration test, the detection function is:? =-13.35? 14.507) 2) (9)-27.20, and the error is 卤2.93 dBm.. Four sets of demonstration experiments have been designed for strain sensors. The results of the demonstration experiments correctly reflect the stress changes caused by finger bending and human respiration, and are in good agreement with the detection model. Secondly, a dual RFID antenna sensor is designed for passive sensor. Two antennas are used as reference tags and one for sensing detection. In this paper, the variation of the two-antenna feedback signal intensity is analyzed in detail, and a functional model of the relationship between the feedback signal intensity difference and the parameters to be measured is established. The close detection position of dual antennas is the premise of work. By this way, the difference of signal intensity caused by antenna position difference can be reduced, and finally the quantitative detection of RFID sensor can be realized. The detection model is: = 2) (). In the practical application of the detection scheme, a humidity sensor based on dual RFID antenna structure is designed in this paper. The detection function of the humidity sensor is:? =-5.94? 2.22, and the error is 卤0.40 dBm.. Judging from the test results of the demonstration experiment,? The variation of the mean value accords with the theoretical expectation of the detection model and can detect the humidity change better. In general, this paper starts with active sensor and passive sensor, and provides two different quantitative detection schemes for antenna sensor. Both of the two quantitative detection schemes have good reliability and can be used in the development of sensors. The realization of quantitative detection scheme not only promotes the application of antenna sensor in real life, but also provides a new way to simplify the signal model of antenna sensor in academic research.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
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