Method for preventing illegal relocation and communication retransmission and device thereof

The device for preventing illegal relocation and communication retransmission, comprising a fixed terminal with an anti-removing mechanism and arranged in an electronic equipment service area and a movable terminal arranged in the electronic equipment, wherein fixed terminal comprises a signal sending module, a signal receiving module, a comparator, a clock and a microcontroller therein;

• under the control of the microcontroller, the signal sending module sends a detection signal to the movable terminal of the electronic equipment;
• after receiving the detection signal, the movable terminal starts an in-place confirming process and simultaneously starts to time until the time accumulated to a preset constant confirmation processing time and then makes an in-place confirming response;
• the signal receiving module receives a response feedback signal from the movable terminal;
• the clock records the response time of the procedure from the signal sending module sending the detection signal to the signal receiving module receiving the feedback signal;
• the comparator compares the time difference, which is determined by subtracting the constant confirmation processing time of the movable terminal from the response time, with a preset time;
• the electronic equipment with the movable terminal is illegally relocated or subjected to communication retransmission if the difference between the time difference and the preset time is larger than a setting range and contrarily the movable terminal is in normal use.