Differential magnetic detector for monitoring cheating in examination room

Abstract

The invention relates to a differential magnetic detector for monitoring cheating in an examination room. The main structure of the differential magnetic detector comprises a box, a frame, a circuit board, batteries, a power circuit, a signal indicator switch, a monitoring indicator alternation switch and a radiator; and nine sub-circuits constitutes the integral circuit. The differential magnetic detector can confirm the position of cheating and display signals by adopting a monitoring circuit composed of the chips of a magnetic field sensor to compare the magnetic induction intensity of the existing special-shaped substances on the basis of the magnetic field generated by a wireless earphone, therefore, cheaters can be located accurately. The magnetic detector has the advantages of reasonable design, compact structure, small size, high portability and convenient operation and application; the magnetic detector powered by a positive 9V DC supply covers a monitoring radial distance of 200mm to 300mm in a straight line with the monitoring accuracy being higher than 95%, therefore, the differential magnetic detector is an ideal magnetic detecting device for monitoring the cheating activity in the examination room; and the differential magnetic detector fills in the scientific research blank for the similar technology.

Description

technical field [0001] The invention relates to a differential magnetic detector for monitoring cheating in an examination room, and belongs to the technical field of electronic equipment and methods for monitoring cheating in an examination room. Background technique [0002] With social progress and economic development, the demand for high-quality talents is increasing day by day. As an important form of talent assessment, examination is indispensable and an important link to test the quality of talents; in higher education, with The requirements for teaching level are constantly improving, and the influence of academic performance is increasing. At the same time, the problem of cheating in exams is also becoming more and more serious. There are always a few people who want to take shortcuts and cheat in the exam room, especially in large-scale national exams. For example, in the English CET-4 and CET-6 exams, and the postgraduate entrance exams, wireless communication an...

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Problems solved by technology

[0002] With social progress and economic development, the demand for high-quality talents is increasing day by day. As an important form of talent assessment, examination is indispensable and an important link to test the quality of talents; in higher education, with The requirements for teaching level are constantly improving, and the influence of academic performance is increasing. At the same time, the problem of cheating in exams is also becoming more and more serious. There are always a few people who want to take shortcuts and cheat in the exam room, especially in large-scale national exams. For example, in the English CET-4 and CET-6 exams, and the postgraduate entrance exams, wireless communication and wireless earphones are used to receive cheating transmission signals outside the exam room, and listen to and answer test questions immediately, or receive prompts. , Violation of discipline in the examination room leads to untrue results of candidates, burying candidates with real talents, resulting in a decline in the style of study and a decline in students' enthusiasm for learning

[0003] At present, in response to the phenomenon of cheating in exams, some electronic invigilation monitoring equipment have also been launched, such as "electronic dog", "examination master" and other products. Although these products can also detect audio signals and electromagnetic field signals when candidates cheat There is a certain range of cheating, but it is often impossible to accurately locate the examinee himself. This kind of product has certain limitations. In actual application, because the specific person cannot be identified, the cheating examinee escapes, which affects the fairness and impartiality of the exam. Painful, but helpless

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