8results about How to "Reduce reading errors" patented technology

The utility model provides a rail brace outer facade vernier caliper, which is composed of an L-shaped main ruler, an F-shaped auxiliary ruler, a main ruler vernier, a main ruler frame, an auxiliary ruler frame and a plurality of fastening screws, the L-shaped upper jaw of the main ruler is matched with the upper inclined surface of the rail brace, the main ruler vernier is equipped with a main ruler vernier lower jaw which is attached to the lower inclined surface of the rail brace and used for measuring the outer facade height of the rail brace, the bottom of the main ruler is slidably matched with the main ruler frame, the main ruler frame is vertically fixedly connected with the horizontal auxiliary ruler frame, the auxiliary ruler frame is horizontally slidably matched with the horizontal auxiliary ruler, and the F-shaped right jaw of the auxiliary ruler is matched with the bottom side edge of the rail brace and used for measuring the outer facade width of the rail brace. The utility model has the advantages of few components, simple structure, simple operation, convenient reading, accurate, stable and reliable measurement results, and convenience in measuring the vertical height and width of the outer facade of the rail brace, and is suitable for promotion.

The utility model discloses a ground surface settlement monitoring device which comprises a horizontal plate and a transparent protective cover arranged above the horizontal plate, a graduated scale is arranged on the outer wall of the protective cover, an observation rod is arranged in the protective cover, the observation rod penetrates through the center of the horizontal plate and is movably connected with the horizontal plate, a settlement plate is arranged at the bottom end of the observation rod, and a reading mark post is arranged at the top end of the observation rod. Two ends of the reading marker post are slidably connected with the protective cover. During use, the settlement plate is located on the ground surface, along with ground surface settlement, the settlement plate drives the observation rod to descend, the reading marker post at the top end of the observation rod moves downwards, the settlement amount is obtained by reading the scales on the protective cover, and compared with the prior art, reading is convenient, and reading errors are reduced.