Educational Apparatus to Collect the Data of Environmental Ionizing Radiations with the Landscape-Image of Survey Route

1. 环境电离辐射的教育用途。我们制作了一种简易的伽马射线计数器，由一台便携式测量仪和一台袖珍计算机组成。测量仪与袖珍电脑的接口电路是手工制作的。在福井沿着道路测量了环境伽马射线的相对强度。当穿过隧道或悬崖时，强度增加，并且在若坂地区观察到地质效应。我们可以将该系统作为计算机辅助测量的教材。建立了由袖珍计算机、数模转换电路、比较器电路和计数器电路组成的测量系统。该学生对该装置进行了实验，编写了测量和控制的程序制作机动，并采用窗型脉冲高度分析法测量了伽马射线的能谱。通过研究电子电路和计算机，他们可以加深对电离辐射的关注。我们制作了另一套测量环境伽马射线当量剂量率的仪器，并采集了调查路线的景观图像。它由伽马射线测量仪、模数转换器、笔记个人电脑和数字摄像机组成。我们拍摄了调查路线的景观照片，测量了环境辐射的等效剂量率。笔记型个人计算机累积等效剂量率数据。将记录仪上的数据和测路图像移至个人计算机上进行综合处理。因此，我们直观地了解了背景辐射与环境之间的关系。这对电离辐射的基础教育是有效的。

1. For the purpose of educational use of environmental ionizing radiations. we have made a simple gamma-ray counter consisted of a portable survey meter and a pocket-computer. The interface circuit of survey meter and pocket-computer was handmade. The relative intensities of environmental gamma-rays were measured along the road in Fukui. The intensities increased, when passing through tunnels or by cliffs, and the geological effects were observed at Wakasa district. We can use this system as a teaching material of computer-assisted measurement.2. The measurement system which combined the pocket computer, the digital to analog conversion circuit, the comparator circuit and the counter circuit was established. The student experimented with this device They did the program making maneuver for the measurement and control, and they measured the energy spectrum of gamma rays by the window type pulse height analysis method. Their concerns for the ionizing radiation can be deepened, studying the electronic circuits and the computer3. We made another apparatus to measre the equvalent dose rate of environmental gamma-rays and to collect the landscape-image of survey route. This consists of a gamma-ray survey meter, AD converter, a note personal-computer, and a digital video camera. We take a picture of the landscape of the survey route, measuring the equivalent dose rate of environmental radiation. The note personal-computer accumulates the data of equivalent dose rate. The data in note personal-computer and the image of survey-route are moved to a personal-computer and are synthesized. As a result, we intuitively understand the relation between the backgroud radiation and the environment. This is effective to the basic education of ionizing radiation.