Ordinary measurement requirements - ruler
Features:
A ruler is the most common ruler, usually straight and made of wood, plastic, or metal materials. Its scale is usually clear and its length is 15cm、30cm Waiting for multiple specifications. For example, the length of the ruler used by students is generally 15 - 20cmEasy to carry and perform simple length measurements on books and workbooks, with a scale accuracy of up to 1mmCan meet the measurement of line segment length, graphic edge length, etc. in daily learning.
Application Scenario:
Learning purpose: In mathematics and geometry learning, it is used to measure the length of line segments, draw straight lines, measure the side length and height of shapes, etc. For example, when learning the edge length relationship of a triangle, accurately measuring the lengths of the three sides with a ruler is used to verify the triangle trilateration theorem.
Office use: It can be used for simple paper size measurement in the office, or to assist in drawing straight lines when drawing simple charts. For example, when making a simple bar chart, use a ruler to ensure that the edges of the column are straight, and measure the height of the column to ensure correct proportions.
Measurement with high precision requirements - vernier caliper
Features:
A vernier caliper is a precision measuring tool consisting of a main ruler and a vernier attached to the main ruler that can slide. It can achieve more accurate measurements by matching the scale on the cursor with the scale on the main ruler. Common vernier calipers can be precise to 0.02mm or 0.05mmThe measurement range is generally 0 - 150mm、0 - 200mm Capable of measuring the inner diameter, outer diameter, depth, and other dimensions of objects in various specifications.
Application Scenario:
Mechanical processing: In the field of mechanical manufacturing, it is used to measure the dimensions of mechanical parts, such as the diameter of shafts, the inner diameter of holes, etc. For example, when machining a metal shaft on a lathe, the diameter of the shaft is accurately measured with a vernier caliper to ensure that its size meets the design requirements and the error is controlled within a very small range to ensure the accuracy of the fit between the part and other components.
Mold manufacturing: Measurement of mold dimensions is also crucial. For example, in the manufacturing of injection molds, it is necessary to accurately measure the size of the mold cavity. A vernier caliper can accurately measure the size of each part, ensuring the dimensional accuracy of the plastic products produced by the mold.
Measurement of long objects - tape measure
Features:
Tape measures are usually made of thin steel sheets or plastic strips that can be curled and stored. Its length is usually 3m、5m、10m Waiting for various specifications, some even longer. The scale accuracy is generally 1mmIts advantage is that it can measure longer distances and is easy to carry and operate.
Application Scenario:
In the construction industry, it is used to measure the room size, door and window size, wall length, etc. of buildings. For example, when decorating a house, workers use a tape measure to measure the length, width, and height of the room in order to calculate the wall area and floor area, and determine the amount of decoration materials needed.
Home life: It is also very practical in the home, such as measuring the size of furniture to see if it is suitable to be placed in a certain space, or measuring the length of curtains, etc.
Measurement of curves or irregular shapes - tape measure
Features:
A flexible ruler is usually made of cloth or plastic, which can bend and easily fit the curved shape of an object. The accuracy of the scale varies depending on its purpose, and is generally 1mm - 5mm.
Application Scenario:
Clothing production: Used in the process of clothing design and production to measure body dimensions such as chest circumference, waist circumference, hip circumference, etc. Because the human body has an irregular shape, a tape measure can fit the body curve well, obtain accurate dimensions, and ensure that the clothing produced fits well.
Handmade: When making handicrafts with curved shapes, such as pottery, weaving, etc., a tape measure can be used to measure the circumference of the work, the length of the curved part, etc. |