System for implementing planar positioning in small space depending on two wave of different wave speed
A plane positioning, small space technology, applied in the direction of radio wave measurement system, positioning, measuring devices, etc., can solve the problems that the teacher cannot be accurately positioned, cannot be photographed, and the teacher's activity area is limited
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[0058] condition:
[0059] There are 15 receivers arranged on the ceiling of a certain classroom, numbered 1 to 15 respectively. Each sink has its own coordinates. In the classroom there is a transmitter worn by the teacher.
[0060] Positioning process:
[0061] 1. The scan command is sent by the information collector to determine the number and number of transmitters and receivers in the system. The process is shown in Figure 2.
[0062] 2. The information collector sends a positioning command to determine the positioning of the transmitter on the teacher.
[0063] 3. The transmitter sends out ultrasonic signals and electromagnetic wave signals at the same time after receiving the instruction.
[0064] 4. The receiver receives two different waves, and uses the time difference of the received signals to calculate the actual distance from each receiver to the transmitter.
[0065] 5. The software randomly selects the numbers of 3 receivers and the distance parameters bet...
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