What are the tools for measuring the length of an object?

Common tools used to measure length are rulers, tape measures, vernier calipers, and spiral micrometers (also called micrometers). Other rulers, such as triangulation and tape measures, are also commonly used to measure length.

The short ones can be measured with a steel tape measure, and the long ones should be measured with a tape measure. Measuring long objects is measured in (meters) and objects measuring relatively short are measured in (millimeters). It is often assumed that the unit of measurement is centimeters.

The ruler that measures the length is the meter ruler. There are several types of meter rulers:

1. The meter ruler is made of wood or plastic, only one meter of the measurement length, and cannot be bent.

2. Tape measure plastic and other materials, ranging from one meter to two meters, can be bent, used for tailoring, and can also be used for physical education teaching (long jump, shot put when measuring length) 3, tape measure metal and other materials, 3 5 meters, to a certain extent, can be bent, used for decoration and other projects, can also be used in daily life. Before the use of extended materials, do three looks: 1. First, see whether the zero scale of the scale is worn, if it has been worn, a scale value should be re-selected as the starting point of measurement.

2. Secondly, look at the measurement range (i.e., measuring range) of the scale. In principle, the length measurement requires a measurement, if the measurement range is less than the actual length, it is necessary to move the scale to measure several times, which will produce a large error.

3. Finally, you should look at the minimum scale value of the scale. The length value represented by the smallest scale not only reflects the different accuracy of the scale, but also relates to the validity of the measurement results. The range and minimum scale value should be selected based on the actual measurement requirements.

A measuring tool is a tool for measuring a certain property. These include length, temperature, time, mass, force, current, voltage, resistance, sound, radio, refractive index, and average dispersion. The earliest tools used in mechanical engineering were some mechanical measuring tools, such as angle rulers, calipers, etc.

Multimeter, also known as multiplex meter, multi-meter, three-purpose meter, multi-meter, multi-meter, etc., is an indispensable measuring instrument for power electronics and other departments, generally for the main purpose of measuring voltage, current and resistance.

Multimeters are divided into pointer multimeters and digital multimeters according to the way they are displayed. It is a multi-functional, multi-range measuring instrument, generally multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, and some can also measure AC current, capacitance, inductance and some parameters of semiconductors (such as).

Tools for measuring length include vernier calipers, scale rulers, tape measures, laser rangefinders, spiral micrometers, etc.

1. Vernier caliper.

A measuring tool for measuring length, outer diameter and depth. The vernier caliper is composed of two parts: the main ruler and the vernier attached to the main ruler that can slide. The main ruler is generally in millimeters, and the vernier has or 50 sub-grids, according to the different sub-grids, vernier calipers can be divided into ten-degree vernier calipers, twenty-degree vernier calipers, fifty-degree vernier calipers, etc., the vernier is 10 divisions of 9mm, 20 divisions of 19mm, 50 divisions of 49mm.

2. a scale.

The scale of the scale is generally 1mm, and the student range of the general specification is 10cm, 15cm, and 20cm.

3. a tape measure. Measuring tools commonly used in daily life. What you often see is a steel tape measure, which is commonly used in construction and decoration, and is also one of the essential tools for families. It is divided into fiber tape measure, tape measure, waist circumference ruler, etc. Luban ruler, feng shui ruler, and Wen meter ruler are also steel tape measures.

4. Laser rangefinder.

An instrument that uses a certain parameter of a modulated laser to measure the distance to a target. The laser rangefinder measures in meters.

5. Spiral micrometer.

A tool that measures length more precisely than a vernier caliper, and can be used to measure length accurately, with a measurement range of a few centimeters. A part of it is machined into a thread with a pitch of the pitch, and when it rotates in the screw sleeve of the fixing casing B, it moves forward or backward, and the movable casing C and the screw rod are connected as a whole, and its periphery is equally divided into 50 sub-grids.

The length of an object can be measured with a scale, and the length units are nanometers, microns, millimeters, centimeters, decimeters, meters, kilometers, light years, etc., the shortest objects are often used in nanometers as units, and the longest objects are often used in light years as units.

The scale is a tool that uses the length unit as the standard to mark the scale and measure the length of the object, the graduation value of the scale is generally 1mm, and the student range of the general specification is 10cm, 15cm, and 20cm. Measuring length with a scale is a fundamental skill in physical experiments, and it is also the basis for correct readings from other measuring instruments.

A common tool used to measure length is a scale.

The graduation value of the scale is generally 1mm, and the student range of the general specification is 10cm, 15cm, and 20cm. When reading the result, it is generally necessary to estimate the next digit of the minimum scale value. If the minimum scale of the triangular ruler is mm, and the length of 2cm is measured with it, if it is exactly aligned on the scale line, the correct record should be, where is the number accurately read by the ruler surface, and since there is no estimated reading, it is necessary to add "0" to the 10th decile of the millimeter.

Common tools used to measure length include rulers, tape measures, vernier calipers, and spiral micrometers (also known as micrometers). Various other scales such as triangular rulers and tape measures are also commonly used to measure length.

Copyed from a textbook、、、I don't know if it can help you、The standard answer should be this。

Millimeter scales, vernier calipers, spiral micrometers, meter rulers, laser ranging, etc.

Rulers, vernier calipers, spiral micrometers, tape measures, tape measures.

Vernier calipers, scale rulers, meter rulers, laser rangefinders, spiral micrometers.

Scales (collectively referred to as 'scales').

Several commonly used length measuring tools, tape measure, tape measure and vernier caliper.

What are the tools for measuring length.