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What Is The Measuring Instruments in Engineering Measurement

What Is The Measuring Instruments in Engineering Measurement

What Is The Measuring Instruments in Engineering Measurement

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  1. An instrument for measuring the height difference between two points.

Consists of telescopes, levelers ( or compensators ) and bases. By structure : fixed mirror level, rotary mirror level, micro tilt level, automatic level. Leveling instruments are widely used in control, topography and construction layout measurement. The series standards of Chinese level are : DS05, DS1, DS3, DS10, DS20 and so on ( ' DS ' means ' geodetic level ', ' 05, 1, 3,... 'is the accidental mean square error of the height difference median of each kilometer level measurement represented by the instrument in millimeters ). A laser leveler may be formed when special accessories are attached to the leveler.

 

2. A theodolite measuring horizontal and vertical angles.

It is composed of telescope, horizontal plate, vertical plate and base. By reading equipment is divided into cursor theodolite, optical theodolite and electronic ( automatic display ) theodolite. The theodolite is widely used in control, topography and construction lofting measurement. China theodolite series : DJ07, DJ1, DJ2, DJ6, DJ15, DJ60 six models ( ' DJ ' means ' geodetic theodolite ', ' 07, 1, 2,... 'The mean error in the horizontal direction of a measurement in seconds for such instruments, respectively. When special accessories are attached to the theodolite, it can be composed of laser theodolite, slope theodolite, etc.

 

3.Total station, namely Electronic Total Station, is a high-tech measuring instrument integrating light, machinery and electricity.

It is a surveying and mapping instrument system integrating horizontal angle, vertical angle, distance ( oblique distance, horizontal distance ) and height difference measurement function. Compared with optical theodolite, electronic theodolite converts optical disc to photoelectric scanning disc, and replaces manual optical measurement readings with automatic recording and displaying readings, which simplifies angle measurement operation and avoids reading error. Since the once-placed instrument can complete all the measurement work on the station, it is called the total station instrument. Widely used in precision engineering measurement or deformation monitoring of large buildings and underground tunnels.

 

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