The 2023 e-sports competition has started. After looking at the questions, there are a few questions with a little idea, and I will share them with you. I don't know if it's right or not, welcome to discuss together.
Question C_Inductance and capacitance measurement device
For the digital bridge solution, there are open source solutions on the Internet, you can look for them. ADI has an integrated chip AD5933 , which measures impedance, you can see if it can be used. refer to:
https://www.armbbs.cn/forum.php?mod=viewthread&tid=107200&extra=page%3D1
Question F_Intelligent positioning system based on sound propagation
The principle of sound wave (ultrasonic) distance measurement measures four distances, and then calculates the position through the positioning algorithm. refer to:
The positioning algorithm can use the Chan algorithm, refer to
https://item.taobao.com/item.htm?spm=a21dvs.23580594.0.0.1d293d0dIubG5H&ft=t&id=731807117815
H question signal separation device
AD collects the signal after the adder, and FFT analyzes the waveform and amplitude of the signal. Then use two DACs to restore the waveform. (Not sure if it's right).
Problem K
The microphone amplifies and AD collects the sound, and the FFT calculates the sound frequency to judge the sound source. A passive buzzer can be used for sound performance, refer to:
source code:
https://item.taobao.com/item.htm?spm=a1z10.1-c.w4004-8192824768.12.458d1b9d8L2zaF&id=679567748409