Abstract

The necessity of radiation measurement has beenincreasing since the accident at the Fukushima nuclear powerplant. But general radiation detector is very expensive. So itis difficult to increase the number of radiation monitoringstations. On the other hand, inexpensive radiation measuringinstruments have been sold for private use. So our purpose isto develop the system that enables us to collect and transmitradiation information with using a portable radiation detector.Then we developed sensor network to collect radiationinformation using a portable radiation detector. Powerconsumption of sensor nodes were reduced about 40% bysleep function. We confirmed operation with four sensornodes. We developed web application that helps to collectand transmit radiation information of both wireless sensornetwork and radiation monitoring stations operating inMaizuru.

Highlights

  • Since the Fukushima nuclear accident in the Great East Japan Earthquake of March 2011, there has been a growing interest in the radiation of personal belongings

  • This graph shows radiation dose in transition from 9am to 12am on January 9th, 2015. This graph shows radiation information obtained through the sensor network and from radiation measurement stations running in Maizuru

  • We have developed the system that functions to collect and transmit radiation information

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Summary

Introduction

Since the Fukushima nuclear accident in the Great East Japan Earthquake of March 2011, there has been a growing interest in the radiation of personal belongings. There has been an increasing demand in the information of Spatial Distribution of radiation dose in the region and continuous measurement(1)(2). Seven monitoring stations are insufficient in number to grasp spatial distribution of radiation in Maizuru. One of the reasons why there are not enough monitoring stations in Maizuru is that instruments for measuring the spatial distribution of radiation is generally expensive, and that it is costly to install radiation monitoring stations. These days, we can buy a reasonable radiation detector and radiation detector kits for private use. We are able to upload measured radiation dose to website. It have never reported a system that continuously collect radiation dose and upload collected information to website. We develop a system that collect and transmit the radiation information by developing sensor network through wireless communication

System Configuration
Constitution of sensor network
Constitution of radiation information collection transmitting unit
An overview of the wireless sensor network
Components
Operation of sensor node
Operation of coordinator
Collection information with radiation monitoring stations
Sending out information
Emergency notice of radiation information
Measurement of power consumed by sensor nodes
The prototype of sensor network
Web Application
Checking the operation of emergency notification function
Findings
Summary
Full Text
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