光电传感器是通过把光强度的变化转换成电信号的变化来实现控制的。
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　　Through continuous learning and publicity, we can make a positive contribution to fire warning, prevention and rescue, and at the same time enhance our own safety awareness and self-rescue ability. Everyone is ready to work together for the safety of themselves, their families, and their friends!
此外，光电开关的结构元件中还有发射板和光导纤维。
三角反射板是结构牢固的发射装置。它由很小的三角锥体反射材料组成，能够使光束准确地从反射板中返回，具有实用意义。它可以在与光轴0到25的范围改变发射角，使光束几乎是从一根发射线，经过反射后，还是从这根反射线返回。
。 This number "119" looks very "familiar" because it is consistent with the fire alarm number in our country.
⑴槽型光电传感器
Yiyang Wang Zihao's personal profile: table tennis
Which nine gold is Yiyang China
Spread fire safety knowledge to family members and children, so that safety awareness is rooted in the heart.
⑶反光板型光电开关
What does Yiyang Jiujin refer to
⑷扩散反射型光电开关
它的检测头里也装有一个发光器和一个收光器，但前方没有反光板。正常情况下发光器发出的光收光器是找不到的。当检测物通过时挡住了光，并把光部分反射回来，收光器就收到光信号，输出一个开关信号。 

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