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What measuring instruments are needed in the construction site? ,

The measuring instruments needed in the construction site are:

1, level:

Level is an instrument to establish a horizontal line of sight and measure the height difference between two points on the ground. The principle is to measure the height difference between ground points according to the leveling principle.

The main components are telescope, pipe level (or compensator), vertical shaft, base and anchor screw. According to the structure, it is divided into micro-tilt level, automatic level, laser level and digital level (also known as electronic level). According to the accuracy, it is divided into precision level and ordinary level.

2, theodolite:

Theodolite is a precise measuring instrument for measuring angles in measuring tasks, which can be used for measuring angles, setting out projects and measuring rough distances. The whole instrument consists of instrument and tripod.

3, total station:

Total station is a high-tech measuring instrument integrating optics, mechanics and electricity. It is a surveying and mapping instrument system which integrates the functions of collecting water, measuring vertical angle, distance (oblique distance and horizontal distance) and height difference. Because it can place instruments at one time to complete all the measurement work on the station, it is called total station.

It is widely used in the field of precision engineering survey or deformation monitoring, such as large buildings above ground and underground tunnel construction.

4, plumb hammer:

A plumb hammer, also known as a wire pendant, has a light wire above it and a heavy lead block hanging below it. The lead block forms an inverted cone. After being suspended vertically by gravity, it points vertically downward to the center of the earth. Compared with the vertical line, it can be determined whether the object next to it is vertical, which is mostly used for architectural survey.

5, rangefinder:

Rangefinder is a tool for measuring length or distance, which can cooperate with angle measuring equipment or modules to measure parameters such as angle and area. There are many forms of rangefinder, generally a long cylinder, which consists of objective lens, eyepiece, display device (which can be built in), battery and so on.

The accuracy of laser rangefinder mainly depends on the calculation accuracy of laser sending and receiving time. According to the technology and application, laser rangefinder can be divided into conventional laser rangefinder (mainly used for outdoor sports, hunting, etc. ) and high-precision laser rangefinder are used in surveying and mapping, land survey, construction, engineering application, military and other occasions with high precision requirements.

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