Detailed description of level products


Release time:

2022-07-06

The widely used level is also called a level. In the past, it seems that a trench was dug directly in the land and water was released in it, making it a level standard. The use of drains and folding screens is documented. Pour water into a board with grooves on the upper surface of the board to determine the level of the board, and stretch the water line to match it to form a horizontal line.

Detailed description of level products

The widely used level is also called a level. In the past, it seems that a trench was dug directly in the land and water was released in it, making it a level standard. The use of drains and folding screens is documented. Pour water into a board with grooves on the upper surface of the board to determine the level of the board, and stretch the water line to match it to form a horizontal line.

The other water line is stretched at a position higher by a certain dimension as a reference line in the height direction. For levels, the ancestors found that the water was flat, and

It has been refined through a long history and has become a high-value tool. "The horizontal direction is the direction perpendicular to the direction of gravity."

The mechanism of the level also takes advantage of the physical characteristics that conform to this principle.

One of them is the bubble level, which takes advantage of the fact that the liquid surface always tends to be horizontal.

The other is a pointer level, which takes advantage of the fact that "when weight (weight) acts in the direction of gravity, it will stand still.

Bubble level

When the bubble position is in the center between the marked lines, the bubble level shows horizontal, vertical and gradient. The frame is made of aluminum, resin, or the like.

Pointer Type Level

A weight is attached to the other side of the pointer. When the axis of the pointer rotates and acts in the direction of gravity, the pointer indicates horizontal, vertical and gradient.

digital level

The digital level displays the angle, rise, and ratio numerically. You can set/unset any zero.

It is also called a handheld level and is a simple measuring instrument. Pedestrian survey to produce geological map roadmap, field survey before fine survey (preliminary survey), horizontal observation in field maintenance and landscaping work, growth observation of flowers and agricultural products (spike height), simple survey of mountain forest, etc. Accuracy and mountain area for unnecessary horizontal observation and slope observation.

Basically it is a low-power telescope with a bubble level attached to the top, a low magnification of about 3 to 5 times, or just a line-of-sight tube, which keeps the cylinder level and collimates the station. In addition to the horizontal special type with a fixed bubble tube, there is also a type of height protractor with a bubble tube on the top that can read the inclination.

If water is injected so that bubbles do not enter the middle, the liquid level at both ends will always remain level, which is used to determine or confirm the liquid level (height difference) between the two far points. The use of rubber tubes and glass tubes began around the middle of the Meiji era. To use it, two people are required to hold the end of the hose and calibrate the liquid level, but products with vertical barrels and electronic water level gauges that notify the liquid level to match through a buzzer on one side are also on sale. If you use these, you can work alone. The structure is mainly a hose, which is cheap and easy to operate, but with high precision.

Modern high-precision level and level (telescope level) are widely used, but it is difficult to use the level when the measuring points are more than several meters apart or the measuring points are uneven. Unless the line of sight between the sites is blocked by other objects or the space for the tripod on which the measuring instrument is installed cannot be ensured, the level cannot be used. In this case, water injection pipes are usually used. ..

 

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