| 摘要 |
FIELD: devices for determination of tunneling shield position relative to tunnel design axis by light beam of laser indicator; applicable in manual and automatic control of tunneling shield attitude in tunnel construction. SUBSTANCE: device has collecting lens, photosensor, modulator with zero position pickup. Modulator is made in form of two lightproof plates located at angle to each other. Modulator design makes it possible to increase accuracy of measurement and range of measurement of angular coordinates. Device is provided with two pendulum transducers of deviation from vertical. Modulator lightproof plates serve as measuring instrument of pendulum position. EFFECT: improved design of device. 3 cl, 3 dwg |
