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It can definitely be measured. The principle is the same as that of a telescope to measure distance, except that the accuracy of measuring distance is much lower than that of a theodolite.
The way to measure distance with a telescope is:
Pick up the telescope and adjust the interval and focal length of the eyepiece first, and you can clearly see that the glass plate of the right lens tube is engraved with crosshairs. From the intersection point, the left and right are called the direction division, and the upper and lower divisions are called the high and low divisions.
When measuring the direction angle, the direction is divided, and when the vertical angle is measured, the high and low are divided. When measuring, it is necessary to hold the telescope flat, aim at one end of the target with any direction division (or high and low division), and read out the number of dense positions between the other end of the target, that is, the direction angle (or high and low angle) of the target.
After measuring the direction angle (or high and low angle), and then according to the width (or height) of the known target, the distance can be calculated according to the following dense position formula.
Distance = target width (or height) 1000 dentures.
The scale of the level may also be a secret value, please refer to the description of the level for details. Can you reply to how much the scale of the level is equivalent to the entire circumference? Is it a secret position? Thank you!
o( o If mine is helpful to you, remember oh and appreciate.
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The difference between the upper wire and the lower wire reading of the level is multiplied by the line-of-sight constant (generally 100), if the upper wire reading is 1750 and the lower wire reading is 1000, the distance between the level and the tower ruler is (1750-1000) * 100 = 75 meters.
A level is an instrument that establishes a horizontal line of sight to determine 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 the telescope, the tube level (or compensator), the vertical axis, the base, the foot spiral.
According to the structure, it is divided into micro-inclination level, automatic leveling level, laser level and digital level (also known as electronic level). According to the accuracy, it is divided into precision level and ordinary level.
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Question 1: How to measure distance with a level? The distance measurement with the level is not very accurate, and the specific method is that the difference between the upper and lower wire readings * 100 (cm to m) is the distance from the front (back) ruler to the level. S2 accuracy is generally not less than.
Level: The level, commonly known as the level, is a measuring instrument for measuring the elevation difference of the observation point, mainly used for the level measurement of the engineering site. An instrument that measures the difference in height between points on the ground according to the principle of leveling.
The level came after the invention of the telescope and the level in the 17th and 18th centuries.
Question 2: How to measure the distance of the level line-of-sight method, the accuracy is not high, it is an approximate distance, and the difference between the upper and lower wire readings is multiplied by 100 when we practiced.
Question 3: The farthest distance measured by the level The requirements for leveling are different for different levels, and here, it is generally not about how far apart the stations are, but the length of the front and rear sight distances. What is the line-of-sight length, it is a station B, the scene is from A-B-C, A, C are the two points of the ruler, and the front and rear sight distance length L=AB+BC.
Each station must meet the requirements before it can be relocated. Therefore, there is no saying that the two stations are far apart, because one station is one station, and if one station does not meet the requirements, this station will have to be retested, and it has nothing to do with the previous station. The sight length of this specification is as follows:
First-class level, the front and rear sight distance length l 30m, the front and rear sight distance difference y=|ab-bc|, the whole process of cumulative parallax difference; Second-class level, the front and rear sight distance length l 50m, front and rear sight distance difference y=|ab-bc|, the whole process of cumulative parallax difference; Third-class level, the front and rear sight distance length l 65m, the front and rear sight distance difference y=|ab-bc|, the whole process of cumulative parallax difference; Fourth-class level, the front and rear sight distance length l 80m, and the front and rear sight distance difference y=|ab-bc|, the whole process of cumulative parallax difference;
Question 4: How does the level measure distance? It is recommended that you read the following library introduction in detail.
If your problem is solved.
Question 5: How to measure the distance with a level? I forgot the formula of the measurement, the distance between the two points, the difference between the upper and lower wires, and the master who knew it complained about it, and I just practiced and asked for advice.
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Level line-of-sight method to measure distance: the level generally uses the middle wire to measure the elevation, and there are two short transverse wires on and below the middle wire. The upper and lower wires are also called line-of-sight wires. The line-of-sight multiplication constant of a general level is 100
That is, the height difference on the ruler is equal to the distance from the center of the level to 10m. In other words, if you look at the level with a telescope, the difference between the upper and lower wires is equal to the visual distance of 100 m
Upper filament-lower filament) 100 = distance.
The line-of-sight measurement distance must be accurately read, and it is necessary to pay attention to the on-site proofreading, the error is about 5%, or the steel tape measure or rangefinder is more direct, not easy to make mistakes, and the accuracy is high.
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The level can estimate the distance using the line-of-sight method. The optical level is based on a large grid on the scale as the line-of-sight unit of 1 meter. The electronic level automatically calculates the distance.
The barge in the figure is commonly known as the fort, which is a stone masonry built along the slope for the purpose of protecting the river bank or slope, which is to stabilize the soil and stone slope and play the role of a retaining wall.
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1. Placement.
Placement involves mounting the instrument on a retractable tripod and placing it between two observation points. First, open the tripod and make the height moderate, use the visual estimation method to make the head of the tripod roughly level and check whether the tripod is secure, then open the instrument case and attach the leveling instrument to the tripod with the attachment spiral.
2. Coarse flat. Rough leveling is to make the line of sight of the instrument roughly horizontal, and use the foot spiral to place the circle level bubble in the circle of indicators. How to do it: Practice with an instrument. During the leveling process, the bubbles move in the same direction as the thumb movements.
3. Aim. Aiming is the use of a telescope to aim at a target accurately. The first step is to point the telescope at a bright background in the distance and turn the eyepiece focus spiral to make the crosshair clearest.
Then loosen the fixed spiral, rotate the telescope, align the connection between the illuminator and the front sight with the level, and tighten the fixed spiral. Finally, turn the objective lens to the light spiral, so that the level of the level clearly falls on the plane of the cross wire, and then rotate the micro motion spiral, so that the image of the level bar leans on the side of the cross wire.
4. Jingping. Precision leveling is to make the telescope's line of sight precisely level. The micro-tilt level is equipped with a set of prisms on the upper part of the leveling tube, which can refract the two ends of the bubble of the leveling tube into the observation window of the level next to the mirror tube, if the bubble is centered, the image at both ends of the bubble will be in a parabolic shape, indicating the level of sight. If the images at both ends of the bubble do not match, it means that the line of sight is not level.
At this time, the right hand can be used to turn the micro-tilting spiral to make the image of the two ends of the bubble completely match, and the instrument can provide a horizontal line of sight to meet the requirements of the basic principle of leveling. Note: The left half of the bubble moves in a direction that is not always the same as the direction of the right thumb.
5. Reading. Using a cross wire, take a screenshot of the reading on the level. The level is mostly an inverted telescope, and the reading should be carried out from top to bottom. Estimate millimeter readings first, then report all readings.
Note that the steps of using the level must be carried out in the above order, not reversed, especially the blister adjustment before reading, which must be carried out before reading.
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It is the line-of-sight measurement, when the vertical angle is 0 degrees (line of sight) :d=100L, (L is the difference between the readings of the upper and lower wires); When it is inclination, d=100*l*(cosa) 2, and a is the inclination angle.
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Foresight distance = (foresight upper wire - foresight lower wire)*100 If there is a red and black surface, the red and black surfaces on the top are each once, and then the average rear view distance is the same (the instrument must be leveled).
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The level can measure the settlement, can copy the elevation, can measure the closed route, and the branch wire··· You want to know which one.
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Turn it on, measure the distance, and you're done.
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The line-of-sight method, the accuracy is not high, it is an approximate distance, and when we practiced in that year, the difference between the readings of the upper and lower wires was multiplied by 100.
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Read the upper and lower wires of the ruler and multiply by 100
This is the line-of-sight. There is still a difference between the actual distance and the actual one.
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