Development Of On-Line Monitoring Platform Of Radioactive Source Based On The Internet Of Things

Since the supervision of radioactive sources is not scientific and only monitors certain parameters, this paper, entitled: "Radioactive sources: on-line monitoring platform development based on the Internet of things technology", will evaluate the results of the research conducted on the implementation of the on-line monitoring technology(informatization, automation and networking) of radioactive sources. The studies on the platform consist of an on-line monitoring method of radioactive sources based on RFID(radio frequency identification) technology. This includes setting up indoor radiation sources, as well as developing an information monitoring terminal for outdoor radioactive sources. These will define the rapid on-site online monitoring parameters, thereby reducing the risk of losing control of radioactive sources. After all, safety states, that the timely appraisal of safety parameters of radioactive sources can be obtained through the improvement of supervision and early warnings. At the same time improving the networking technology of the safety control of radioactive sources with the application of reference significance and academic value. The research here for was financed by the special funds for safety production in Guangdong province in 2013(No.2013-101).This paper will analyse the research and clarify the Chinese and the foreign on-line monitoring of radioactive sources and the RFID indoor rapid positioning technology. The results of which will determine the content of this study. The main points of this paper are:⑴ Focus on the indoor supervision of radioactive sources through manual inspections. By using video surveillance combined with the Internet of Things, networking measurements and control technology we propose a scheme of indoor online monitoring of radioactive sources based on RFID technology in order to monitor the state of radioactive sources. The coordination of video information will establish a monitoring subsystem of status information, according to the different states of radioactive sources, through the mechanism of the RFID. This status information is then automatically updated and analysed by the systems coding, modulation etc. Additionally, RFID technology will be used to build a security system in order to improve safety supervision. The reliabil ity of the subsystems will further be improved with a 16 bit cyclic redundancy check method that creates link error detection, by setting the indoor reference tags and requiring readers to build RFID positioning subsystems one can coordinate the positioning information of radioactive sources. The video information monitoring system uses a network of hard disk recorders in order to establish and define the function of remote monitoring and motion detection.⑵Due to the advantages of the low cost and simplicity of the Received Signal Strength Indication(RSSI) and the RFID positioning system it is possible to analyse the indoor wireless channel loss model. We will discuss the advantages and disadvantages of the algorithm mechanism of LANDMARC, VIRE and RFID classic positioning based on the RSSI. When then combined with the radial basis function method and the quantum behaved particle swarm it becomes an optimization algorithm, the RBF-QPSO algorithm. Simulation has shown that by using RBF-QPSO localization algorithm accuracy has improved significantly, with only a margin of error of roughly 0.167 m. Compared to the Line ar-QPSO and the VIRE algorithm the accuracy of RBF-QPSO algorithm demonstrates an increase of 80.17% and 84.5% respectively.⑶Based on the need of monitoring external radioactive sources it is necessary to establish an overall framework of external on-line monitoring terminal. It is necessary to analyse the sensor acquisition module’s signal processing and the central control module as well as the wireless sensor interaction module. The working principle will be analysed according to the field parameters such as position, dose, integrity and temperature whose measuring accuracy and s ensing network interface of the sensor acquisition module will incorporate.In order to improve the accuracy of the sensor data the field data processing algorithm must be explored and a moving average measurement method must be put forward. In order to imp rove measurement system reliability and real-time effectively the design of FIR filter and IIR+FIR filter with a process of front-end signal, such as position, dose and temperature, will be used. The design of the reliable mechanism of data transmission in cludes proposing a circular buffer mechanism in order to avoid the congestion and loss of front-end data. By selecting BCH coding it is possible for transmitted data to be calibrated and errors can be corrected with the use of a Ping Pong method, whereby t ransmitted data can be processed faster than before.⑷Test the positioning data and verify the integrity of the switch module and testing the temperature data and the dose data in different testing conditions. These test results show that by moving the average measurement algorithm the jitter and random error of positioning data can be effectively reduced. The FIR filter in turn can be used to improve the SNR of the 5.151 d B in the common indoor environment. And that by using the designed IIR+FIR filter the relative error of temperature sensor measures is reduced to less than 0.67%. The accuracy of measurements can also be improved by 0.27%~1.25% in the standard test environment of 20 ~38 degrees.