A Low-Cost Wireless Temperature Sensor: Evaluation for Use in Environmental Monitoring Applications (original) (raw)
Free related PDFsRelated papers
Free PDF
Wireless Sensor Node Application For Weather Monitoring
2018
This paper proposes a design idea of an automatic weather station. The system shall involve the implementation of drivers for capturing temperature, relative humidity, pressure and performing analog to digital conversions using SHT25, MS5611 and MCP3424 sensors respectively. They shall be open source providing additional functionalities missing in the proprietary firmware. The data (temperature, relative humidity, and pressure) shall be collected through the use of radio wireless sensor nodes (RSS2). The collected data shall be transmitted to the remote server. This data shall be accessed remotely by means of accessing the server via its IP address on to which the sink node shall be attached. This data shall be manipulated and used for forecasting purposes. The system shall include a graphic user interface application (SensorReader) that shall be used to access and store data on the server.
Free PDF
Free PDF
Free PDF
Wireless Sensor Network to Monitor Spatio- Temporal Thermal Comfort of Polyhouse Environment
Precision agriculture is an innovative technology, wherein the crops are cultivated in controlled environment. Emphasizing the need of precision agriculture, an electronic system is designed to provide thermal comfort to the crops of polyhouse environment, wherein an ubiquitous technology, Wireless Sensor Network (WSN) is deployed. To realize the establishment of wireless sensor network, a wireless sensor node is designed using embedded philosophy and presented in this paper. Availing promising features of AVR ATmega 8L microcontroller, the wireless sensor node is designed to monitor the thermal status of the polyhouse environment in spatio-temporal domain. The precision temperature sensor LM35 is employed to read the thermal status. Moreover, the signal conditioning circuit is wired about TLC 271, which operates on one power supply only and exhibiting very high input impedance with rail to rail input. An analog signal is digitized with on chip analog to digital converter with 10 bit resolution. The controlling unit is also designed to activate the heater as well as ventilators. To ensure wireless communication, the Zigbee model from Digi corporation is deployed as RF module. The sensor nodes are calibrated to the real unit and its performance is confirmed by comparing the results with standard digital thermometer. Each sensor node is assigned with network ID and it communicates the data with the respective ID in star topology. The present wireless sensor network is deployed in the polyhouse to monitor thermal status. It works continuously and precisely to hold control on temperature of the domain with great reliability.
Free PDF
Development of a WSN for Greenhouse Microclimate Distribution Monitoring
Annals ”Valahia” University of Targoviste - Agriculture, 2016
Precision greenhouse agriculture requires several measuring points in order to have a better overview of the whole cultivation area. Climate variability within the covered area of a greenhouse can result in a non-uniform plant development and reduced productivity. Therefore, a distributed system, capable of taking multi-point measurements would be able to catch the climatic gradients in order to provide growers with a more detailed depiction of the climate at any time and early warnings of potential threats. Furthermore, the distributed monitoring can offer the appropriate inputs to more sophisticated distributed or plant-based climate control algorithms. The significant price drop in embedded computer and wireless communication chips, as well as the overall maturity of the available, low-power platforms have made the deployment of Wireless Sensor Networks increasingly attractive in modern agricultural facilities. This paper presents a Wireless Sensor Network (WSN) deployed for long...
Free PDF
Free PDF
Application of Low-Cost Sensors for Accurate Ambient Temperature Monitoring
Buildings
In structures with reduced monitoring budgets, the high cost of commercial metering devices is always an obstacle for monitoring structural health. This might be an issue when temperatures must be measured for both structural and environmental reasons. To fill this gap, in this paper, a novel monitoring system is proposed for the accurate measurement of indoor temperature in buildings. This protocol is characterized by its generality, as it can be easily adapted to measure any structural or environmental parameters on site. The proposed monitoring system uses from one to eight low-cost sensors to obtain multiple measurements of the ambient temperatures. The accuracy ranges of the developed monitoring systems with different numbers of sensors are statistically analysed. The results indicate that the discrepancy of the measurements decreases with the increase in the number of sensors, as the maximum standard deviation of 10 sensors (0.42) decreases to 0.32 and 0.27 for clusters of 20 ...
Free PDF
A Study on the Development of a Wireless Climate Monitoring System
The aim of this study is to develop a wireless-controlled meteorological station. For this purpose, a microcontroller evaluating climatic factors such as air temperature, relative humidity, wind velocity, wind direction and rain was used. The data obtained from the sensors were transmitted to a climate-monitoring unit located in a control room, through a radio modem. Data, received from meteorological station, monitored on a LCD, were loaded into an EEPROM that is in microcontroller and sent to a PC via RS232 interface. All data transferred to PC also allows to save climate data over a longer period and to display data in graphs. In addition, if the air conditions come too close to peak point such as strong wind velocity, heavy rain and high temperature, an alarm is generated,.
Free PDF
Free PDF
