﻿ 温度/湿度/光强多参数测量仪研制 Development of Temperature/Humidity/Light Intensity Multiparameter Measuring Instrument

Journal of Sensor Technology and Application
Vol. 06  No. 04 ( 2018 ), Article ID: 26993 , 9 pages
10.12677/JSTA.2018.64014

Development of Temperature/Humidity/Light Intensity Multiparameter Measuring Instrument

Ying Zhang, Degao Lan, Xiaofeng Zhao*

Key Laboratory of Electronics Engineering, College of Heilongjiang Province, Heilongjiang University, Harbin Heilongjiang

Received: Sep. 6th, 2018; accepted: Sep. 21st, 2018; published: Sep. 28th, 2018

ABSTRACT

In this paper, in order to monitor the indoor home environment, a temperature/humidity/light intensity multiparameter measuring instrument based on ATmega328p was designed. Temperature, humidity and light intensity were monitored using platinum thermal resistance temperature sensor (WZP-035), capacitive humidity sensor (HS1101) and photosensitive sensor (GL5537) respectively; the temperature monitoring ranges from −10˚C to 40˚C, the humidity monitoring ranges from 10% RH to 60% RH, and light intensity monitoring ranges from 10 lx to 1000 lx. Through analyzing the basic structure and working principle of sensors, the static characteristics of three sensors were calibrated. On this base, the signal processing circuit was designed and manufactured, and the single-chip microcomputer was adopted for data processing. The LCD12864 liquid crystal display was used to display signal. The results show that this system can monitor indoor temperature, humidity and light intensity, and display the value stably.

Keywords:Temperature Sensor, Humidity Sensor, Light Sensor, Environmental Parameter, Comfort

1. 引言

2. 传感器结构和原理

2.1. 铂热电阻的结构和原理

$Rt={R}_{0}\left[1+AT+B{T}^{2}+C\left(T-100\right){T}^{3}\right]$ (1)

$Rt={R}_{0}\left(1+AT+B{T}^{2}\right)$ (2)

Figure 1. Basic structure schematic diagram of platinum thermistor

2.2. 湿敏元件的结构和原理

${\epsilon }_{x}={\epsilon }_{0}+ku$ (3)

${C}_{x}=\frac{{\epsilon }_{x}S}{d}=\frac{{\epsilon }_{0}S}{d}+\frac{kS}{d}\cdot u$ (4)

${C}_{x}={k}_{1}+{k}_{2}u$ (5)

2.3. 光敏电阻的结构和原理

3. 传感器特性测试

3.1. 铂热电阻静态特性测试

Figure 2. Basic structure schematic diagram of humidity sensitive capacitance

Figure 3. Basic structure schematic diagram of photo resistance

3.2. 湿敏电容静态特性测试

3.3. 光敏电阻静态特性测试

4. 多参数测量仪设计与制作

4.1. 系统总体结构

4.2. 多参数测量仪硬件电路设计

Figure 4. Temperature characteristic test: (a) High-low temperature test chamber; (b) Experimental curves and fitting lines of temperature sensor

Figure 5. Humidity characteristic test: (a) Saturated salt solution; (b) Humidity characteristic curves

Figure 6. Photosensitivity test: (a) Testing system; (b) Photosensitive characteristic curve and fitting line

Figure 7. Design block diagram of monitoring system

Figure 8. Circuit principle diagram of multiparameter measuring instrument

4.3. 软件设计

5. 结果与讨论

(a) (b)(c)

Figure 9. Three different measured acquisition circuits: (a) Temperature acquisition circuit; (b) Humidity measuring circuit; (c) Light intensity acquisition circuit

Figure 10. The photograph of multiparameter measuring instrument

Figure 11. The relationship curves between experimental value and standard value: (a) Temperature; (b) Humidity; (c) Light intensity

6. 结论

Development of Temperature/Humidity/Light Intensity Multiparameter Measuring Instrument[J]. 传感器技术与应用, 2018, 06(04): 121-129. https://doi.org/10.12677/JSTA.2018.64014

1. 1. Zhang, Q., Yang, X.L., Zhou, Y.M., et al. (2007) A Wireless Solution for Greenhouse Monitoring and Control System Based on Zig Bee Technology. Journal of Zhejiang University Science A, 8, 1584-1587. https://doi.org/10.1631/jzus.2007.A1584

2. 2. 王磊, 李桂香, 王元麟. 基于Pt100热电阻的温度检测系统设计[J]. 中国仪器仪表, 2014(12): 33-35.

3. 3. Tucker, W.G. (1992) Characterizing Emissions and Health Effects of Sources of Indoor Air Contami-nants. Annals of the NewYork Academy of Sciences, 641, 1-6. https://doi.org/10.1111/j.1749-6632.1992.tb16526.x

4. 4. 常君, 李延. 湿度传感器HS1101在智能家居控制系统中的应用[J]. 电子测试, 2008(2): 77-80.

5. 5. 王卫兵, 张宏, 郭文兰. 传感器技术及其应用实例[M]. 北京: 机械工业出版社, 2015:5-9.

6. 6. 张红兵, 王华凌. 基于铂电阻PT100的温度传感器设计[J]. 电子科技, 2012(11): 36.

7. 7. 丁喜波. 电容式湿度传感器测试方法与测试系统研究[D]: [博士学位论文]. 哈尔滨: 哈尔滨理工大学, 2005.

8. 8. 马爱霞, 梁妍. 光敏电阻及其应用[J]. 科技资讯, 2017, 15(14): 33-35.

9. 9. 宁慧英. 基于光电传感器的智能小车自动寻迹控制系统[J]. 仪表技术与传感器, 2012(1): 108-110.

10. 10. Lan, D.G., Zhao, X.F., Wang, F., et al. (2018) Fabrication and Characteristics of the High-Sensitivity Humidity Sensor of Anodic Aluminum Oxide Based on Silicon Substrates. International Journal of Modern Physics B, 32, 1-10. https://doi.org/10.1142/S0217979218501990

11. 11. 杜一腾, 迟宗涛. 基于Arduino与yeelink平台的实时环境监测系统[J]. 单片机与嵌入式系统应用, 2014(10): 26-29.

12. NOTES

*通讯作者。