Digital levelling system, method, composite coding levelling staff and production method thereof

A technology of leveling ruler and composite coding, applied in the science and field of surveying and mapping, can solve the problem of excessive production process requirements, and achieve the effects of reducing costs, simplifying production processes, and reducing production accuracy requirements.
CN102829757AActive Publication Date: 2012-12-19HENAN DERUIPU SURVEYING & MAPPING INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HENAN DERUIPU SURVEYING & MAPPING INSTR CO LTD
Publication Date
2012-12-19

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Abstract

The invention relates to a digital levelling system, a method, a composite coding levelling staff and a production method thereof. The composite coding levelling staff is provided with a fine coding area and a reading area on the surface thereof, wherein the fine coding area is provided with indicating circles with equal interval and same size and arranged in single row, and locations of the centers of the indicating circles to the bottom of the levelling staff can be calculated from the reading area arranged correspondingly. According to invention, the above arrangement is simple in structure and easy to realize. During the production technology, by using a template duplicating form to produce the composite coding levelling staff, each levelling staff has a high degree of consistency, so that a high-precision reading can be ensured by calibrating the template with high precision and correcting with a mathematics model, and production technology is simplified and cost is reduced at the same time. The instrument system can meet levelling standards of national first and second grades. A high-precision indium steel rule uses an indium steel band as a base steel, and can achieve a resolution of 0.01 mm through cooperating with a high-resolution area array CCD, thereby greatly improving measure precision.
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Description

technical field

[0001] The invention belongs to the field of surveying and mapping science and technology, and relates to a composite coded level gauge, a production method thereof, and a digital level measurement system and method using the composite coded level gauge. Background technique

[0002] A digital level measuring instrument is generally composed of a coded leveling rod and a leveling instrument. In order to realize the automation and high precision of the leveling measurement reading, the coding design of the leveling rod is very important. An accurate reading of the height of the horizontal line of sight on the leveling staff. There are currently many digital levels, such as the Leica DNA series (formerly Leica Measurement Systems Co., Ltd.) of Hexagon in Sweden, the DINI series of Trimble in the United States (formerly Zeiss in Germany), and the DL series of Topcon in Japan. Wuhan University in China also designs digital levels; all current digital levels are ...

Claims

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