IR sensor （红外传感器）What is ir-sensor？ https://www.fierceelectronics.com/sensors/what-ir-sensor版权声明：本文为weixin_42932072原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。原文链接：https://blog.csdn.net/weixin_42932072/article/details/105996129