Measurement And Analysis To Wireless Sensor Netwoek Node Energy Consumption

Sensor network, a new popular technology in recently, was considered as one of the 21st century's most influential technologies. It consists of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, and to cooperatively pass their data through the network to a main location. It has very broad application prospects in the military, medical, transportation, construction and many other areas. But the energy efficiency is the key issues of the wireless sensor network, and the accurate measurement of energy consumption of the sensor nodes is the basis for assessment.At present, the development of the wireless sensor network at an early stage, the measuring equipment of the energy consumption of sensor network nodes is not a lot which can be divided into two methods. One is the software simulation methods, such as EmTOS, NS-2 and PowerTOSSIM. It uses the simulation tool to analyze and estimate the energy consumption of the running nodes, but it carry out under the given parameters, so it has a certain gap between the actual situation. The other is the hardware experimental method, which uses the extra hardware to monitor and measure the energy consumption of the nodes, such as Dutta and SPOT. But the both measurement methods of energy consumption of sensor network nodes are difficult to meet the long term, fine-grained and high-precision measurement needs. Therefore, this paper proposes a new measurement method which base on the hardware experimental method and achieves a measurement equipment of energy consumption of sensor network nodes.Comparing with above methods and equipments, the method this paper proposed is based on measurement circuit which composed by current sampling, high-speed analog to digital conversion chip and the field-programmable gate array. It has the following advantages:1. It can exactly measure the node energy consumption.2. It can continuously measure the node energy consumption, thus it can observe the energy consumption change of the node in a time period.3. When we obtained the measurement results from the equipment, it doing the next processing and analysis for the measurement data, and finally showing the results in a easy observing way for the users. Thus it contributes to analyze the sensor node relevance between the electricity consumption and power consumption in different modules, design and implement the sensor network protocols and applications of energy efficient.Finally, from analyzing the experimental results, the device is reliable and effective in the province of wireless sensor networks measurement.