At this stage, data signals are basically ubiquitous, and all electrical equipment will be surrounded by them. In the absence of mobile phones, the impact of such heavily surrounded data signals on other electrical equipment is rare. This is because when mobile phones are not used, there is no data communication between mobile phones and communication base stations, and it is unlikely to generate suddenly changed data signals. There is a relatively stable magnetic field around the electrical equipment, that is, a static data magnetic field, The magnetic field of such static data has almost zero impact on electrical equipment.
When the mobile phone is used, it has the data information communication between the mobile phone and the communication base station, which results in arbitrary sudden changes of data signals, generating a dynamic magnetic field around the electrical equipment. Such dynamic magnetic field data signals can magnetically induce sudden changes of electromagnetic interference, which is very easy to lead to neurological disorders of electrical equipment. When the mobile phone starts and rings, it can cause sufficient kinetic energy to cause spark discharge caused by light flame, which is likely to cause a fire accident. Crude oil, chemical plant, safety and other relevant departments have clearly stipulated that it is strictly prohibited to use mobile phones in gas stations. The implementation of wireless signal shielding equipment is not ideal at this stage.
The machines and equipment in the gas station are all controlled by computers. The data signal will endanger all the normal work of the machines and equipment, which will lead to the prohibition of metrological verification. More importantly, there will be flames on the mobile phone during the whole process of dialing, which is very likely to cause fire accidents and lead to the explosion of the gas station. Therefore, the gas station belonging to the important place of fire safety is not only prohibited from using mobile phones within the website, but also does not need to use mobile phones within two or three meters around the gas station. In addition, the gas filling station should set up a prominent sign on the mobile phone of "No Dialing", and increase publicity efforts on the importance of safety knowledge, so that everyone can understand that it is undoubtedly the same industry to use mobile phones in the gas filling station.
There are several fire accidents caused by the use of mobile phones throughout the country. The driver of a gas station in Henan Province used his mobile phone when giving fuel, which caused an explosion, leading to a huge safety accident with many casualties. There are also several fire accidents and emergencies caused by phone calls at gas stations in Shenzhen, Chongqing and other cities. The risks arising from the application of mobile phones in gas filling stations have already caused great attention from all aspects. Relevant departments in Beijing, Hubei Province, Inner Mongolia Autonomous Region, Guangdong Province, Henan Province, Shandong Province, Jiangxi Province, Sichuan Province, Chongqing City and other places have proposed to apply wireless signal shielding equipment to gas filling stations under their jurisdiction. Sinopec and the headquarters of PetroChina Company have been the first to apply wireless signal shielding equipment to gas filling stations in some regions.