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针对以振弦作为弹性敏感元件的检测装置中存在的不足 ,提出以槽隙式光断续器作为振弦的拾振装置。槽隙式光断续器由红外发光二极管和光敏三极管组合而成 ,通过发光与感光而工作。把振弦置于槽隙的通光截面中 ,若合理选择振弦与通光截面的相对位置 ,光敏三极管的光电流中就会含有振弦的振动信息。论述了光断续器作为拾振装置的工作过程及理论依据 ,最后用MATLAB进行了仿真 ,结果证明了用光断续器作为振弦的拾振装置的可行性
Aiming at the shortcomings of the detection device with the vibrating wire as the elastic sensor, a slit-type photo-interrupter is proposed as the vibrating pick-up device. Slot-type photo interrupter by the infrared light-emitting diodes and phototransistors from the combination of light and light through the work. The vibrating wire is placed in the light transmission cross section of the slot. If the relative positions of the vibrating wire and the light transmitting section are reasonably selected, the phototransistor of the phototransistor will contain the vibration information of the vibrating wire. The working process and theoretical basis of the photo interrupter as the pick-up device were discussed. Finally, the simulation was carried out by MATLAB, and the feasibility of using the optical interrupter as the pickup device of the vibrating string was proved