How to use the angle measuring instrument, how to measure the angle?

Angle measuring instruments? I don't understand.

Method 1: Spread your fingers as far as possible and place your palm on the surface of the angle you want to measure. The little finger should be at the bottom, representing 0°. The angle between the thumb and the little finger is 90°, and the angle between the little finger and the other fingers is ° and 60°, respectively.

Method 2: If you don't have a protractor, you can draw corners with the help of a triangular ruler, and the following demonstrates the skills of using a triangular ruler to draw corners:

1. First of all, the most basic, there are two triangular rulers, one of which is °; The other is two 45° and one 90°, and if you want to draw a 30° angle, take out the first triangle.

2. Then draw two straight lines along the 30° angle of the first triangular ruler to get a 30° angle, and the other angles are the same.

3. Another pair of three angles can not only draw °, but also draw the angle of the sum of any two of these three angles, such as using a pair of triangles to piece together a 70° angle (30°+45°).

4. At this time, draw two straight lines along the two triangle rulers to get a 75° angle, and the operation method of other angle patchwork is the same.

Method 3: A fixed-length thread (wool, sewing thread, etc.) is tied to the pen (chalk, pencil, etc.) at one end, the left thumb of both hands is fixed without the end of the pen, and the other hand drives the pen to rotate a circle.

A protractor is a drawing tool that allows you to draw the desired angle as needed. The specific steps are as follows:

1. The points coincide, that is, the center of the protractor coincides with the vertex of the angle. Place the protractor on top of the corner you are drawing, then find the vertices of the horn so that the center of the protractor coincides with the vertex of the horn, and then one side of the angle coincides with the zero tick mark.

2. The line edge coincides, that is, the "0" tick mark of the protractor should coincide completely with one side of the angle.

3. There are two situations when reading, the first case: when the opening of the angle is to the right, the inner circle of the protractor is generally measured by looking at the scale mark. The second case: when the opening of the angle is to the left, the angle is generally measured by looking at the scale mark of the outer ring of the protractor.

4. After measuring the angle, be sure to mark the degree of the angle at the position of the opening of the angle.

Categories of special cornersAcute angle: Angles greater than 0° and less than 90° are called acute angles.

Right angle: An angle equal to 90° is called a right angle.

Obtuse angle. Angles greater than 90° and less than 180° are called obtuse angles.

Flat angle: An angle equal to 180° is called a flat angle.

Optimal angle: greater than 180° and less than 360° is called optimal angle.

Inferior angle: greater than 0° and less than 180° is called inferior angle, acute angle, right angle, and obtuse angle are all inferior angles.

Circumferential angle: An angle equal to 360° is called a circumferential angle.

Negative angle: An angle that rotates in a clockwise direction is called a negative angle.

Positive Angle: The angle that rotates counterclockwise is a positive angle.

Zero angle: An angle equal to 0°.

According to the table, the details are as follows:

There are two rounds in the table, one of which contains two semi-cycles of destroyed rocks.

The first time: stand at point O read the macro slag disc on the left, first aim at point A reading left = 0 05 30 and then aim at point B Reading B left = 120 18 24 This completes a semi-round. The value is:

b Left - A Left = 120 12 54 Now adjust the reading Aim at point B first Reading B right = 300 13 30 Aim again at point A reading right = 180 05 42

Complete another half round, the value is: b right - a right = 120 12 48 . The rounded value is the average of two and a half rounds.

The second rounding: the algorithm is the same as the first time, except that b right - a right should be equal to 30 17 24 + 360 0 0-270 04 24 = 120 12 54 (plus a 360 degrees).

First draw a line segment, then use the middle point of the protractor to align one end of the line segment to measure the 70-degree angle, and then point the point of the 70-degree angle at the edge of the protractor, connecting the points with the endpoints.

For example: 1. Use a triangle plate to make an angle, so that BCA 302, take a point P arbitrarily on a ruler, and let it reach the end of the ruler O (that is, on the most edge of the ruler) The length is A

3. Take C as the center of the circle and A as the radius as the circle C, so that CB intersects C in B4, so that O moves on the straight line AC, and P moves on the circumference of the circle C

So BOC is 1 3 BCA=10

5. Use the triangle plate to make a 60-degree angle and add it together.

1. Horizontal angle measurement principle.

point, then the horizontal projection line o1

The angle between A1 and O1B1 is called the horizontal angle between the two directions of the ground direction line OA and OB. Therefore, the horizontal angle is the angle formed by the plumb projection of the direction line from a certain point on the ground to the two targets on the horizontal plane, and its value is 0° 360°.

Figure 3-1 Horizontal angle measurement principle.

In order to determine the size of the horizontal angle, it is assumed that a horizontal dial with clockwise uniform drawing is placed horizontally at any point O on the plumb line of point O, and a vertical plane is made by making a vertical plane in the left direction OA and the right direction OB to intersect with the plane of the horizontal dial, and the corresponding readings A and B are intercepted on the degree plate (as shown in Figure 3-1), then the horizontal angle is the right reading B minus the left reading A, that is.

B-A 2. Vertical angle measurement principle.

In the same vertical plane, the angle between the direction line from a point on the ground to the target and the horizontal line of sight is called the vertical angle. As shown in Figure 3-2, the direction line of the target is above the horizontal line of sight, and the vertical angle is positive (+ is called the elevation angle; The direction line of the target is below the horizontal line of sight and the vertical angle is negative (- is called the depression angle. So the vertical angle is 0° 90°.

Figure 3-2 Vertical angle measurement principle.

Like the horizontal angle, the angular value of the vertical angle is the difference between the readings in the two directions on a vertically placed and evenly marked vertical dial, except that one of the directions is the horizontal line of sight. For an optical theodolite, the vertical dial reading should be an integer multiple of 90° in the horizontal line-of-sight direction, so when measuring the vertical angle, the vertical angle can be calculated as long as the vertical dial reading is aimed at the target and read.

The commonly used optical theodolite is a kind of angle measuring instrument made according to the above-mentioned angle measurement principle and its requirements.

There are two rounds in the table One round has two and a half rounds The first time: stand at point O The reading disk is on the left, aim at point A first Reading a left = 0 05 30 Then aim at point B Reading B left = 120 18 24 This completes one and a half rounds.

Its value is: b left - a left = 120 12 54 Now adjust the reading (from the left to the right of the disk) Aim at point b first Reading B right = 300 13 30 Aim at point A again Reading a right = 180 05 42 Complete another half test and a half The value is: b right - a right = 120 12 48 One and a half rounds are completed The value of one and a half rounds is the average of the two and a half rounds.

The second rounding algorithm is the same as the first one, except that b right-a right should be equal to 30 17 24 +360 0 0-270 04 24 = 120 12 54 A 360 degree should be added here.

Question 1: What are the length angle measuring instruments The length measuring instruments are:

Vernier calipers Micrometer.

Dial gauge feeler gauge.

Dial gauge plates.

Outer diameter micrometer.

Rulers Angle measuring instruments are:

Question 2: What is the name of the tool for measuring the angle in the machinery industry The tool for measuring the angle in the machinery industry is called the universal angle ruler.

The universal angle ruler is also known as the angle gauge, vernier angle ruler and universal angle protractor, which is an angle measuring tool that uses the vernier reading principle to directly measure the angle of the workpiece or mark the line.

The universal angle gauge is suitable for internal and external angle measurement in machining, and can measure the outer angle of 0°-320° and the inner angle of 40°-130°.

Question 3: What are the instruments that can be used to measure angles in measurement work? There are many methods and instruments that can be used to measure angles, and the only instruments that can achieve a degree of accuracy are theodolite and total station.

Question 4: What are the measuring angle instruments? Angle sensor? Inclination sensors can measure angles.

Question 5: What is the name of the instrument and equipment for measuring the verticality and yin and yang angle of the house wall? The instrument that measures the verticality of the wall of a house and the angle of yin and yang is called a total station.

Question 6: What is the instrument that can complete the measurement of the angular distance, height difference coordinates and other measures at one station The instrument that can complete the measurement of the angle distance and height difference coordinates on one station is called a total station.

Question 7: What is the most commonly used instrument for angle measurement? Theodolite, total station.

Question 8: What is the measurement method and measuring instrument for the angle of the fan blade? There are a variety of measurement positions, such as: 1. Measure at the petiole more than 20 cm from the blade, 2. Measure at the end of the blade 20-30 cm;

1. a multi-functional bubble angle ruler for measuring instruments, 2. a plane angle ruler;

Reference: Ridge .

A rolling trace of respect = Wu Da Shen 180 =

1rad=180 degrees Wuzhou mill=180 degrees.