Design scheme of wireless signal shielding system in examination room

　　Design scheme of wireless signal shielding system in examination room

　　In recent years, new forms of cheating in exams have appeared frequently, and exam cheating methods and cheating tools have become a professional and high-tech development trend. High-tech cheating methods with radio cheating as the main form pose a serious threat to the normal exam order. Some non-communication frequency cheating devices such as walkie-talkies, wireless invisible headphones, bone conduction headphones, wireless digital transmission and reception tools (cheating erasers, watches, rulers, writing pens, glasses probes, etc.) make traditional cheating prevention and control The equipment is helpless. Driven by interests, cheating in exams has evolved from individual single-handedness to organized and planned group cheating. Frequent cases of cheating in examinations have severely endangered the fairness, justice and credibility of the national education examinations, and have brought severe challenges to the competent departments of education examinations. The "National Medium and Long-term Educational Reform and Development Plan Outline (2010-2020)" document requires "strengthening examination safety responsibilities, strengthening the construction of a credit system, and resolutely preventing and severely investigating fraudulent examinations."

　　According to the "Notice of the Ministry of Education on Vigorously Promoting the Construction of Standardized Test Centers for National Education Examinations" (Teaching [2011] No. 1) and the "Notice of the Provincial Department of Education and the Provincial Department of Finance on Doing a Good Job in the Upgrade and Construction of Standardized Test Centers for National Education Examinations in Jiangsu Province" "(Su Jiao Kao [2017] No. 18) The deployment spirit of the principles of "unified planning, unified standards, overall coordination, step-by-step implementation, efficient and pragmatic", etc., needs to be further strengthened and improved in the construction of the cheating prevention and control system in standardized examination rooms. Requirements analysis The cheating prevention and control system requires that the cheating prevention and control blocker can shield the classroom (-50dBm, indoor transparent environment, depending on the distance of the surrounding base stations): including all the mobile phone signals of the three major operators such as 2G, 3G, 4G, and 5G The signal is shielded according to the current tentative spectrum, and it should be promised to upgrade freely according to the actual 5G commercial spectrum during the warranty period, and shield other signal types: walkie-talkie U-segment, walkie-talkie V-segment, WIFI, Bluetooth, wireless invisible headset, bone conduction headset, wireless Digital transmission and reception tools (eraser for cheating, watch, ruler, writing pen, glasses probe, etc.); other signal types can be added, modified, customized, and expanded: GPS (satellite positioning), 5G, etc.; adopt national CCC standards Switching power supply, equipped with a precise voltage regulator circuit, even if the voltage fluctuates greatly, it will not affect the operation of the host. At the same time, it is equipped with an intelligent control system platform, which can be unified and centralized control across cities, multiple units, and remote networking; B/S architecture, browser login management or C/S client architecture; can support remote control of device switches; support remote monitoring Equipment operating status; supports timing planning, group planning to turn on and off equipment and other functions; supports real-time feedback of the operating status of the signal blocker, and automatically alarms the failure of the blocker; supports switch control, supports 7*24 hours, continuous work, Stable performance; support manual query, automatic query, fault blocker alarm, support log query status browsing, support data backup, recovery authority division, etc.

　　The wireless signal jammer in the examination room has a network interface and supports networking functions. It can be used for independent shielding occasions and also for networking shielding occasions. The wireless signal shielding function can be realized by powering on and turning on the power switch. It can also realize functions such as automatic search equipment, online query of equipment working status and location information, remote control, remote parameter setting, reporting equipment status information, group management, and remote interference adjustment capabilities through the network.

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