Direct-reading laser height measuring instrument

Abstract

The invention provides a direct-reading laser height measuring instrument, belonging to height measuring instruments. The direct-reading laser height measuring instrument comprises a base and one fixing leg and two adjustable legs which are below the base as well as a bubble level at the center of a base panel, and is characterized by being provided with a stand column which is vertically fixed on the base; a spindle at the upper end of the stand column is movably sleeved on a dial on the spindle; a reading scale which is calibrated according to a horizontal spacing between the center of the dial and the bottom of a measured object is movably sleeved on a handle at the back of the dial and on the same spindle with the dial; and a laser emitter closing to an edge of the dial and fixed on the handle emits red laser beams in the radial direction of the dial, wherein the red laser beams is close to a dial surface. The reading scale is calibrated in accordance with an equation H=Ltan Alpha+H0, wherein H is a height value of a measured object point, L is the horizontal spacing between the center of the dial and the bottom of the measured object; Alpha is an included angle between a laser beam and a horizontal line, and H0 is a vertical height between the center of the dial and the bottom of the measured object. The trial result shows that the direct-reading laser height measuring instrument is simple, easy and practical, visualized and convenient, and higher in the correctness of a measuring result.

Description

technical field [0001] The invention belongs to height measuring instruments, in particular to a direct-reading laser height measuring instrument. Background technique [0002] Existing height measuring instruments, such as the height measuring instrument disclosed in Document 1 Chinese Patent Application No. 201110197568.6, include: a bearing frame, an adjustable foot, an angle measuring device, a display device, a laser transmitter, and are characterized in that it also includes: a microprocessor Among them, the lower end surface of the bearing frame is provided with several adjustable brackets for adjusting the level, the upper end of the bearing frame is provided with a laser emitter, the laser emitter and the bearing frame are connected by a hinge, and the laser emitter can be hinged The axis rotates 180 degrees, the angle between the laser emitter and the horizontal plane is obtained by the angle measuring device, and the angle value obtained by the angle measuring dev...

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Problems solved by technology

[0003] The height measuring instrument disclosed in Document 1, on the one hand, needs to perform two measurements of angles α and β, three distances h, L and S at two positions, and the measurement errors caused by five consecutive measurements will inevitably make the measurement results The resulting systematic error and random error are both increased due to the increase in the number of measurements, which affects the correctness of the measurement results; on the other hand, its structure is complex, not only difficult to use and maintain, but also difficult to manufacture, expensive, and difficult to popularize use

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