NCSLab

Installation

• Install Node.js

• Install three.js and a build tool Vite

Launch

cd ~/NCSLab/workspace
python3 main.py
python3 mjpeg_server.py

PWM波控制可变电源

输出电压与PWM波占空比关系如下：

参考：

• PWM原理 PWM频率与占空比详解

输出电流稳定在20mA。

Picamera2

update:2024.6.14 下面这个方案已废弃

update:2024.5.17 先运行/src/online/Camera_test/server_camera.py 在localhost:8091/video_feed下开启视频流 然后/src/online/main.py 运行主网页

Reference

• ⭐️ https://github.com/barry-ran/raspberry-webcam
• ⭐️ How to Install & Setup OpenCV on Raspberry Pi 4
• ⭐️ https://github.com/raspberrypi/picamera2/blob/main/examples/preview.py
• Installing OpenCV on Raspberry Pi 4B

识别电压电流数据

测试图片如下：

注意到，底色和内容颜色都是单一的，因此我们首先通过二值化将两者分离开来。

Release Note

• v2.1.4:
  • fix issue #11 #12 #19
• v2.1.3:
  • self defined html & js
• v2.1.2:
  • rectangle-module and submit
• v2.1.1:
  • support video streaming
• v2.1.0:
  • support continuous channel switch
  • support check for invalid input

Contributor

• Circuit Design: Xizhe Hao, Hongjin Tang
• Video Promotion：Zixuan zhong， Yuxiao Hua
• Web Design： Yuxiao Hua
• Patent Drafting: Yuxiao Hua, Xizhe Hao, Yifeng Zhang
• Patent Application:Xizhe Hao, Yuxiao Hua