When the infrared range finder is set to meters, it is switched to the length unit. Just hold down the U key on the measuring instrument and wait for a few seconds to complete the switch. The laser ruler unit of infrared rangefinder is meter, and the distance is calculated by using the time required for light to travel back and forth between the target and the measuring instrument. We need to know the speed of light, atmospheric refractive index and other data to calculate the distance length.

When using infrared rangefinder to measure, it should be perpendicular to the target, otherwise the data will be inaccurate due to weak signal. The accuracy of infrared rangefinder is very high, and the maximum error is 65438±0mm, which can be used for high-precision measurement.

Second, what are the tools for measuring distance in home decoration?

1, vernier caliper

Among the measuring tools for home decoration, the commonly used measuring tools can mainly measure the length, inside and outside diameter and depth of materials. It consists of a main ruler and a sliding cursor, and can measure units within millimeters.

2. Scale

The scale is a traditional length measuring tool, which can only be used to measure the length unit of an object. The dividing value is 1 mm, and the measuring range is mainly 100 mm, 150 mm and 200mm.

3. Tape measure

Coils are not only commonly used in home decoration, but also widely used in life. For carpenters, steel tape measure is an indispensable measuring tool, and it is also used to measure the length.

4. Laser rangefinder

It is a professional measuring tool with very high measuring accuracy, that is, the infrared rangefinder mentioned above, which has a large measuring range and can be accurately measured within 5000 meters.