Temperature and Humidity Measurement Based on Wireless Sensor Network Technology

2010 ◽  
Vol 439-440 ◽  
pp. 46-50 ◽  
Author(s):  
Xiao Chen
Keyword(s):  
Data Storage ◽  
Humidity Sensor ◽  
Low Cost ◽  
Wireless Sensor ◽  
Dual Function ◽  
Humidity Measurement ◽  
System A ◽  
Wireless Transceiver ◽  
Temperature And Humidity ◽  
Working Principle

To overcome the shortcomings of wired temperature and humidity measurement system, a temperature and humidity measuremet system based on wireless sensor networks was designed. the components of the system and its working principle were described in detail. Its nodes use a digital temperature and humidity sensor SHT15 for data collection, wireless transmission chip CC1100e for data short-range wireless transceiver and the wireless network, and AT89S52 microcontroller for controlling core. Nodes communicate with the background host through serial interfaces. The system can achieve environmental temperature and humidity dynamically and comprehensive real-time monitoring. Node has a dual function as terminals and routers, in addition to data processing, but also for other nodes to forward the temperature and humidity data storage, management, and integration, and taking in collaboration with other nodes to complete some specific tasks. The system has some advantages such as low cost, low power consumption and small size, which has a good application prospects.

scholarly journals Design and implementation of data collection module for WSN application

2015 ◽  
Vol 4 (1) ◽  
pp. 104
Author(s):  
Valentina Markova ◽  
Teodora Trifonova ◽  
Venceslav Draganov
Keyword(s):  
Data Collection ◽  
Power Management ◽  
Low Cost ◽  
Wireless Sensor ◽  
Remote Monitoring System ◽  
Design And Implementation ◽  
System A ◽  
Monitoring Applications ◽  
Reliable Performance ◽  
Proper Operation

This paper presents the design and implementation of universal low cost data collection module (DCM), which is an essential part of remote monitoring system based on wireless sensor network. The proposed module expands the capabilities of a measuring node for collecting data from greater number of sensors. The DCM includes four parts: one group multiplexers for data acquisition, second group multiplexers for power management, voltage to current converters and DC/DC converters. The universal DC/DC converters provide autonomous power supply for the sensors and the multiplexers, which can be turned on or off for a certain period of time. The data collecting, monitoring and logging functions are realized through a LabVIEW project.The proper operation and the reliable performance of the system were proved by practical experiment. The proposed module makes the WSN-based system a versatile solution for a variety of monitoring applications.

Performance Evaluation of a Smart Mobile Air Temperature and Humidity Sensor for Characterizing Intracity Thermal Environment

2020 ◽  
Vol 37 (10) ◽  
pp. 1891-1905
Author(s):  
Chang Cao ◽  
Yichen Yang ◽  
Yang Lu ◽  
Natalie Schultze ◽  
Pingyue Gu ◽  
...  
Keyword(s):  
Air Temperature ◽  
Humidity Sensor ◽  
Thermal Environment ◽  
Spatial Scales ◽  
Low Cost ◽  
Thermal Conditions ◽  
Absolute Humidity ◽  
Health Concern ◽  
Vegetation Fraction ◽  
Temperature And Humidity

AbstractHeat stress caused by high air temperature and high humidity is a serious health concern for urban residents. Mobile measurement of these two parameters can complement weather station observations because of its ability to capture data at fine spatial scales and in places where people live and work. In this paper, we describe a smart temperature and humidity sensor (Smart-T) for use on bicycles to characterize intracity variations in human thermal conditions. The sensor has several key characteristics of internet of things (IoT) technology, including lightweight, low cost, low power consumption, ability to communicate and geolocate the data (via the cyclist’s smartphone), and the potential to be deployed in large quantities. The sensor has a reproducibility of 0.03°–0.05°C for temperature and of 0.18%–0.33% for relative humidity (one standard deviation of variation among multiple units). The time constant with a complete radiation shelter and moving at a normal cycling speed is 9.7 and 18.5 s for temperature and humidity, respectively, corresponding to a spatial resolution of 40 and 70 m. Measurements were made with the sensor on street transects in Nanjing, China. Results show that increasing vegetation fraction causes reduction in both air temperature and absolute humidity and that increasing impervious surface fraction has the opposite effect.

Design and Implementation of RAM Operation Conflict Arbiter IC in LED/LCD Display Control System

2012 ◽  
Vol 268-270 ◽  
pp. 1574-1577
Author(s):  
Zhao Jie ◽  
Fei Yu ◽  
Jing Xia Wang ◽  
Liu Li
Keyword(s):  
Control System ◽  
Low Cost ◽  
Structure Design ◽  
Verilog Hdl ◽  
Design And Implementation ◽  
System A ◽  
Lcd Display ◽  
Working Principle ◽  
Fpga Chip ◽  
Display Control

To solve the writing and reading operation conflict to RAM in LED/LCD display control system, a new RAM operation conflict arbiter IC was proposed. Comparing the traditional dual ports RAM, the IC has the advantages of low-cost and high stability. By analyzing the working principle and structure design, the IC was designed in pure digital way with Verilog HDL, and passed the simulation verify. Finally the IC was realized by Alter FPGA chip and passed the actual test.

Research of Recognition Management System for Noise, Temperature and Humidity Based on ZigBee

2013 ◽  
Vol 753-755 ◽  
pp. 2390-2395
Author(s):  
Zheng Mao Li ◽  
Jun Wang ◽  
Di Zheng
Keyword(s):  
Pervasive Computing ◽  
Management System ◽  
Humidity Sensor ◽  
Noise Source ◽  
Noise Temperature ◽  
Wireless Sensor ◽  
Context Aware ◽  
Material Loss ◽  
Zigbee Technology ◽  
Temperature And Humidity

In order to reduce the acoustics material loss caused by the temperature and humidity varying of theatre environment as well as monitoring the noise changes, we have built a ZigBee technology based wireless sensor network. By using the temperature sensor, humidity sensor and the noise sensor we can get the environment information efficiently. Moreover, with the help of the context-aware concept in pervasive computing we build up the noise and temperature humidity cognitive management system. Experimental results show that, the system can effectively locate and recognize the noise source. At the same time it can complete effective early warning and propose according to different materials temperature and humidity characters so as to prolong the service life of the materials and improve their performance effectively.

scholarly journals Self-Powered Autonomous Wireless Sensor Node by Using Silicon-Based 3D Thermoelectric Energy Generator for Environmental Monitoring Application

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 674 ◽  
Author(s):  
Jong-Pil Im ◽  
Jeong Kim ◽  
Jae Lee ◽  
Ji Woo ◽  
Sol Im ◽  
...  
Keyword(s):  
Sensor Node ◽  
Humidity Sensor ◽  
Cold Start ◽  
Wireless Sensor ◽  
Small Scale ◽  
Wireless Sensor Node ◽  
Thermoelectric Energy ◽  
Temperature And Humidity ◽  
Rf Module ◽  
Self Powered

In this paper, we present the results of a preliminary study on the self-powered autonomous wireless sensor node by using thermoelectric energy generator based on Silicon (Si) thermoelectric legs, energy management integrated circuit (EMIC), Radio Frequency (RF) module with a temperature and humidity sensor, etc. A novel thermoelectric module structure is designed as an energy generator module, which consists of 127 pairs of Silicon legs and this module is fabricated and tested to demonstrate the feasibility of generating electrical power under the temperature gradient of 70K. EMIC has three key features besides high efficiency, which are maximum power point tracking (MPPT), cold start, and complete self-power operation. EMIC achieved a cold start voltage of 200 mV, peak efficiency of 78.7%, MPPT efficiency 99.4%, and an output power of 34 mW through only the Thermoelectric Generator (TEG) source. To assess the capability of the device as a small scale power source for internet of things (IoT) service, we also tested energy conversion and storage experiments. Finally, the proposed sensor node system which can transmit and monitor the information from the temperature and humidity sensor through the RF module in real time demonstrates the feasibility for variable applications.

Data Storage on CD-R and CD-RW - Future and Achieving

2001 ◽  
Vol 7 (S2) ◽  
pp. 826-827
Author(s):  
Ping-chin Cheng ◽  
Ming-Yish Chen
Keyword(s):  
Data Storage ◽  
Low Cost ◽  
Injection Molding Process ◽  
Molding Process ◽  
Cd Rom ◽  
Storage Media ◽  
Manufacture Process ◽  
Software Distribution ◽  
Working Principle ◽  
Main Steam

Low cost and reliability, optical storage media, in particular the CD-R, has become the main steam data storage media. This presentation is intended to discuss issues related to the CD-rewriteable technology and the longevity of the data stored.The working principle of CDs can be subdivided into three major categories, the CD-ROM, CD-R and CD-RW. The CD-ROM is primary used for music and software distribution and is manufactured by injection molding process. in contrast, CD-R and CD-RW are storage media allows data storage by users. The manufacture process involves spin-coating a layer of photo-sensitive organic dye on a polycarbonate substrate, then over-coated with a refractive coating. Writing of the data bits was achieved by photo-bleaching processes, which change the absorption properties of the dye. Considering the operation principle, there are many factors influence the reliability and storage life of the CD-R.

A New EV Energy Control System under V2G Mode

2012 ◽  
Vol 562-564 ◽  
pp. 1252-1255
Author(s):  
Zhen Po Wang ◽  
Hai Tao Li
Keyword(s):  
Control System ◽  
Power Supply ◽  
Low Cost ◽  
Energy System ◽  
Energy Control ◽  
Vehicle To Grid ◽  
System A ◽  
The World ◽  
Working Principle

Based on the summarization of the concept of Vehicle-to-Grid and its recent development in the world, two topologies of V2G are put forward accounting for the different power supply modes. According to the analysis of the nowadays EV driving and energy system, a new topology of EV energy control system, which is suitable for application under V2G mode, is put forward, and its working principle is developed. The characteristics of this system are efficient, low cost and high integration. 1. Introduction

scholarly journals Development of a Low-Cost Arduino-Based Weather Station

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Temilola M Adepoju ◽  
Matthias O Oladele ◽  
Abdulwakil A Kasali ◽  
Gbenga J Fabiyi
Keyword(s):  
Data Collection ◽  
Data Storage ◽  
Low Cost ◽  
Data Communication ◽  
Weather Data ◽  
Weather Station ◽  
Atmospheric Conditions ◽  
Rf Transceiver ◽  
Temperature And Humidity ◽  
Arduino Uno

A weather station is a facility located either on land or sea consisting of instruments and equipment which can be used to measure atmospheric conditions so as to provide weather forecasts information and to study the weather. The existing instruments used for measuring the weather elements are expensive which led to the development of a low-cost Arduino-based weather station. The developed low-cost weather station consists of three separate modules which are data collection, data storage, and data communication. These modules communicate serially with each other and are controlled by three separate microcontrollers (Arduino Uno). The data collection module is interfaced with a set of sensors that collects temperature and humidity. The weather data were viewed in real-time through a graphical user interface (GUI) located at the central station. The developed weather station was able to measure the temperature and humidity of a controlled environment, giving the reading at interval of five minutes. It was observed that the average temperature from results obtained (27.360C) with the developed low-cost Arduino based weather station falls within the range of the Accuweather readings (24.00-28.000C). Also, the average humidity of the developed low-cost Arduino based weather station (80.41%) falls within the range of the Weatherspark humidity (78-82%) on 20th August 2019. Therefore, this system can be adopted as a weather station facility. The design can be extended to be web-based in the future to make it available worldwide.Keywords— Arduino Uno, Humidity, RF Transceiver, Temperature, Weather Station

scholarly journals RANCANG BANGUN INSTRUMEN PENGUKUR SUHU DAN KELEMBAPAN UDARA MENGGUNAKAN DT-SENSE SHT11

2014 ◽  
Vol 14 (2) ◽  
pp. 113
Author(s):  
Imam Hidayat ◽  
Hesky Stevy Kolibu ◽  
Slamet Suyitno Raharjo
Keyword(s):  
Air Temperature ◽  
Low Cost ◽  
Measurement Instrument ◽  
Field Trials ◽  
Test Results ◽  
Standard Measurement ◽  
Humidity Measurement ◽  
Measurement Tools ◽  
Temperature And Humidity ◽  
The Difference

ABSTRAK Telah dilakukan pembuatan instumen pengukur suhu dan kelembapan udara menggunakan sensor DT-Sense SHT11 dan modul mikrokontroler DT-AVR Low Cost Micro System. Kemudian instrumen diuji dengan alat ukur standar. Pengujian dilakukan mulai bulan Juni 2013 dan berakhir bulan Oktober 2013di Laboratorium Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sam Ratulangi Manado dan pengujian lapangan dilakukan di Stasiun Meteorologi Kelas II Maritim Bitung. Hasil pengujian dianalisis dengan metode grafik, analisis Korelasi dan Uji t sampel berpasangan. Hasilnya berhasil dibuat dengan ketelitian pengukuran hingga 0,01oC untuk pengukuran suhu udara dan 0,0001% untuk pengukuran kelembapan udara. Terdapat selisih antara instrumen yang dibuat dengan alat ukur standar. Rata-rata 1,4 oC untuk suhu udara dan 3% untuk kelembapan relatif. Kata kunci: sensor, mokrokontroler, SHT11   DESIGN AND BUILD OF AIR TEMPERATURE AND HUMIDITY MEASUREMENT INSTRUMENT USING DT-SENSE SHT11 ABSTRACT Have been made a temperature and humidity measurement instrument using DT-Sense sensor SHT11 and microcontroller modules DT-AVR Low Cost Micro System.‎ Then the instrument was tested with standard measurement tools. The tests were conducted starting in June 2013 and ended in October 2013 at the Laboratory of Physics, Faculty of Mathematics and Natural Sciences, Sam Ratulangi University and field trials conducted in Class II Meteorological Station Maritime Bitung. The test results were analyzed by graphical method, correlation analysis and paired sample t test.The result of measurement accuracy up to 0,01oC for measuring air temperature and up to 0,0001% for air humidity measuring. The difference between the instruments are made with standard measurement tools. An average of 1.4 ° C for temperature and 3% for relative humidity. Keywords: sensor, microcontroller, SHT11

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