The dfr-v-4100gn series channel type radioactive monitoring system is mainly used to monitor whether the substances carried by trucks, containers, trucks and other vehicles contain excessive radioactive substances. The monitoring system is equipped with a plastic scintillator and a standard pressure He-3 medium pressure pipe (optional pressure). It has the characteristics of high sensitivity, low detection limit and rapid measurement. It can monitor various channels in real time and cooperate with speed detection.Video monitoring, license plate recognition, Auxiliary functions such as box number identification (optional) can effectively prevent the illegal carrying and diffusion of radioactive substances, and widely apply to the radioactive monitoring and control of nuclear power stations, customs, airports, railway stations and other places. The monitoring system complies with the relevant requirements of the national standard gbt24246-2009 monitoring system for radioactive substances and special nuclear materials.

1. System standard configuration

γ Detection assembly: plastic scintillator + low noise photomultiplier tube
① Support structure: column and anti-seepage box
② Detector collimation: 5-Sided ring lead box
③ Alarm device: one set of audible and visual alarm in the field and control
④ Management and control system: computer, hard disk, database and analysis software 1 set
⑤ Transmission component: 1 set of TCP / IP transmission component
⑥ Space occupying and velocity measuring device: infrared velocity measuring system

2. System (optional)

① Neutron detection assembly: long life helium 3 neutron tube
② License plate number recognition: 1 set of HD night vision continuous camera and photographing device
③ Vehicle passing Management: 1 set of on-site pole lifting system
④ Equipment installation foundation: 1 set of reinforced concrete body and steel platform

1. Background ignoring Technology

This technology can quickly detect low-level manufactured radioactive substances under the condition of low radiation background, and the detection time can reach 100 milliseconds. Meanwhile, it allows vehicles to detect radioactive substances under the condition of rapid movement, which is suitable for rapid detection, and can ensure that the equipment will not give false alarm due to the rise of the background; In addition, it can compensate for the reduction of the background count caused by the shielding of natural rays when the vehicle is occupied, which increases the authenticity of the inspection results and improves the detection probability, especially for the detection of weak radioactivity;

2. Characteristic sigma statistical algorithm

Through the characteristic sigma algorithm, the detection sensitivity of the equipment and the probability of false alarm can be easily adjusted, and the sensitivity can be improved to detect extremely weak radiation sources (such as loss of radiation sources) when necessary; Or in the process of on-line monitoring in the end of the year, prevent the equipment from false alarm, so as to achieve the same reception and release.

3. 1017 counting long-life imported helium 3 neutron proportional counter tubes

The service life of the conventional helium 3 counter is about 1011 counts, and the service life of the life detector adopted by our company can reach 1017 counts, which is suitable for on-line radiation monitoring and long-term operation in the radiation field.

4. Networking function

The measurement data can be uploaded to the management center through the Internet for system supervision; It can be connected to the radiation detection application platform of the logistics monitoring subsystem of the General Administration of customs.