Military physical training management based on 433MHz+125KHz dual-frequency RFID
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1. Project background
Military physical training and appraisal standards are the common basic requirements of soldiers of different services and arms, and they are also an important prerequisite for completing their duties. Long-distance running is an important training item of military physical training, and it is of great significance to improve the physical fitness of soldiers. But for a long time, the difficulty of multi-person training and the cumbersome multi-person assessment have been a difficult and long-standing problem. This scheme adopts the latest RFID dual-frequency technology, the equipment of the scheme is low-cost, simple and convenient to install, and can realize accurate management of long-distance running training assessment, timing, lap counting, and counting.
2. Program features and advantages
1. The most healthy and environmentally friendly electronic tags: electronic tags are usually in standby mode, do not generate electromagnetic radiation, and only emit signals when they enter the excitation zone. They have ultra-low power consumption, no radiation damage, and safe and reliable use.
2. Electronic tags have a long service life of more than 5 years.
3. Reliable and accurate positioning recognition: Since the excitation boundary error of 125KHz is 30CM and the excitation distance is adjustable from 1 to 5 meters, the excitation distance of this program is set to 3 meters, and the system positioning accuracy can reach 3 meters, which is equivalent to long-distance running. The error of the score is within 0.3 seconds, and the effective recognition rate can reach 100%.
4. In view of the extremely strong diffraction performance of 125KHz and the characteristics of 433MHz active RFID technology such as strong penetrability, strong diffraction, long transmission distance, and suitable for various complex environments, the electronic tag can be worn anywhere on the body. The exciter at the signal receiving end also only needs to be placed in a suitable location nearby and connected to a computer.
Three, the principle of the scheme
The system consists of “monitoring computer”, “125KHz exciter”, “125KHz antenna” and “125KHz+433MHz dual-frequency RFID electronic tag (hereinafter referred to as electronic tag)”.
Distribute an electronic tag to each officer and soldier participating in the running to realize one card per person. Lay a carpet at the starting point of the runway. 2 to 4 excitation antennas are installed in the carpet. The excitation antennas are connected to the exciter through wires. In this way, a 125KHz signal excitation band with a width of 6 meters is formed within 3 meters on both sides of the carpet. When officers and soldiers carrying electronic tags enter the 125KHz excitation zone, the electronic tags are awakened and 433MHz radio frequency signals are sent to the outside. The “exciter” obtains the electronic tag signal and transmits the information to the monitoring computer. The monitoring computer records the reading time of each electronic tag signal and the number of times it enters the 125KHz excitation zone to automatically calculate the number of running laps and results;
In addition, when needed, multiple excitation belts can be set at the runway passing points to avoid the situation of not training according to the prescribed path, and at the same time to record the time of passing the way points.
Fourth, the schematic diagram of the scheme
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