In the utility model, the shape of the carrier plate is a cuboid, the front of the carrier plate is provided with a test paper placing groove which is a rectangular groove; Printing n two-dimensional codes on the test paper placed in the test paper placing groove, wherein n is a positive integer; Each QR code is a test question;
Each two-dimensional code corresponds to a digital number; The random number generator and the 1 display screen are respectively fixed on the carrier board, and the display signal output end of the random number generator is connected with the display signal input end of the 1 display screen; The optical sensor, the controller and the No.2 display screen together form a two-dimensional code scanning device. The utility model is suitable for the examination process.
Signal shielding instrument is a common tool for shielding mobile phone signals in conference rooms, examination rooms and other occasions, in order to avoid the influence of mobile phone communication on meetings and other exams, and to prevent information leakage, cheating in exams and other special purposes. When the mobile phone works, it is connected with the base station through radio waves within a certain frequency range.
The transmission of data and sound is completed at a certain baud rate and modulation mode. The signal shielding instrument scans from the low-end frequency to the high-end frequency of the forward channel at a certain speed in the working process, which will cause garbled interference when the mobile phone receives the message signal, but the current signal shielding instrument is directly carried by the invigilator.
Without any protective measures, it is easy to damage the signal shielding instrument, and the signal shielding instrument with protective measures is inconvenient to use at present, so a student anti-cheating device is proposed to solve the above problems.
Extended data:
Since the examinee entered the examination room, the four subsystems of this system have been working at the same time. As long as someone turns on the computer, the examination platform and the test center monitoring room will immediately give an alarm prompt. The system includes four subsystems, namely, access control system, seat terminal system, podium host system and monitoring room main station system.
The access control system first screens candidates. If you bring a mobile phone into the entrance, the system will automatically call the police. If the mobile phone is turned off when entering the venue, but turned on during the exam, the positioning terminal system will accurately locate the candidates who are using the mobile phone.
And upload the candidate's seat number and personal information to the rostrum hosting system within one second. At this point, the host will call the police and upload the information of cheating candidates to the monitoring room.
Baidu encyclopedia-anti-cheating artifact