为了实现低成本、远距离地对产品进行计数,设计了一种采用1N4148玻封二极管为光电传感器的光电计数电路.采用2 kHz激光调制光源、二阶高通滤波电路提高电路的抗干扰能力,同时采用半导体激光器作为光发射器件,1N4148玻封二极管作为光接收元件.结果表明,设计的光电计数电路实现了对不同时段产品的计数,验证了1N4148作为新型光电传感器与半导体激光器配合使用的可行性.因半导体激光器价格低廉,电路具有低成本、计数距离远等优点,具有应用前景.
In order to achieve a lower cost and long-distance counting of products, a photoelectric counting circuit using 1N4148 glass encapsulated diode as photoelectric sensor is designed. In this paper, a 2 kHz laser modulated light source and a second-order high pass filter circuit are used to improve the anti-interference ability of the circuit. At the same time, the semiconductor laser is used as the optical emission device, and the 1N4148 glass sealed diode is used as the optical receiving element. The experimental results show that the designed photoelectric counting circuit can count the products in different periods of time, and it verifies the feasibility of using 1N4148 as a new photoelectric sensor in ayuction with the semiconductor laser. AS semiconductor laser is cheap, the circuit has the application prospect because of its low cost and long counting distance.
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