DUAL RULER-INSTRUMENT INTEGRATED COMPOSITE LEVEL INSTRUMENT FOR OBSERVATION

摘要

A dual ruler-instrument integrated composite level instrument for observation. The level instrument is provided with a pillar-shaped ruler body (1) and a level (6). A leveling staff (2) parallel to an axis of the pillar-shaped ruler body (1) and an observation unit (3) which can slide up and down are fixed on the same cylindrical surface of the pillar-shaped ruler body (1). The observation unit (3) comprises an opposite-height signal recognizer (4) and a self-height signal recognizer (5) fixedly connected to each other. The collimation axis of the opposite-height signal recognizer (4) is perpendicular to the axis of the pillar-shaped ruler body (1). Point-to-point direct level measurement is fully realized. Point selection and point distribution are not limited by geographical environment, and level measurement can be implemented in a complicated terrain such as steep slopes, ditches, rivers and mountains conveniently.