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据英国 Engincers′ digest 报导,瑞士已把光导纤维技术应用于近距离的传感器。据认为这是现有传感器中最灵敏的一种光电传感器,它适合检测固体、液体及细如人发的粒状物料。测头很小,直径是4～5mm.测头通过光导纤维与结构紧凑的控制箱连接,控制箱内装有脉冲发生器,光源及放大电路.该传感器分阻挡式及反射式两种.阻挡式的发送器与接收器面对面的布置,被测物处于中间,这样接收器所接收的是被测物影响过的光束,感测距离可达250mm。反射式是采用双头的发送器与接收器,利用被测物反射回来的光束进行检测,感测距离可达40mm.两种型式都可以精细调正,使其聚焦在被测物的某一局部细节上.该仪器可以承受250℃的温度,并且光导纤维全部铠装,可免受机械力及高温的影响。
According to the British Engincers’ digest, Switzerland has applied optical fiber technology to close-range sensors. It is believed that this is the most sensitive of the existing sensors, a photoelectric sensor, which is suitable for detecting solid, liquid and fine as human hair granular material. The probe is very small, the diameter is 4 ~ 5mm. The probe is connected with the compact control box through the optical fiber, the control box is equipped with a pulse generator, a light source and an amplifier circuit. The transmitter and receiver face to face arrangement, the measured object in the middle, so that the receiver is received by the measured object affected by the beam, the sensing distance up to 250mm. Reflex is the use of double-headed transmitter and receiver, the use of the measured object reflected from the beam to detect the sensing distance up to 40mm. Both types can be fine-tuning, to focus on the measured object Local details. The instrument can withstand 250 ℃ temperature, and all optical fiber armored, can be protected from mechanical force and high temperature.