With the improvement of the living standards of people, coupled with the acceleration of the transmission of network assistant information. The domestic acceptance of new technologies and new things has been greatly improved compared to before. The hand-held laser rangefinder, which can completely replace our commonly used meter ruler, is becoming more and more popular. The convenience and accuracy of hand-held distance measurement bring great convenience to users. But some people still question the accuracy of this product. In response to this question, we will analyze this issue from the perspective of a R&D, design, and manufacturer:
First of all, from the principle of light rangefinder, laser rangefinder uses the characteristics of laser monochromaticity, coherence and collimation to achieve high-precision measurement. Most hand-held laser rangefinders with a range of 200 meters use the phase method laser ranging principle. It uses the frequency of the radio wave band to amplitude modulate the laser beam and measure the phase delay produced by the modulated light for a round trip, and then convert the distance represented by the phase delay according to the wavelength of the modulated light. That is, the indirect method is used to measure the time required for the light to pass through the line. The principle of this method will not be repeated here. There are a lot of comments on this principle on the Internet, and interested users can check it out.
In response to the principle of phase method ranging, how many key links are there to realize product manufacturing, and to manufacture products with good accuracy and quality?
- Accuracy of core electronic components. With the improvement of the domestic basic industry level, some chip technologies have been greatly improved. At present, the core chips of domestic machines basically use imported chips, and some of them use extremely high-performance domestic chips. APD technology has also been greatly improved. The rapid advancement of these core component technologies has greatly improved the quality of the current domestic-made rangefinders.
- Master the core technology. The ranging procedure is the key, of course a big concept. The ranging program is nothing more than a design based on the principle, but the key to the success of the design lies in the algorithm. Here is a core technology.
- With the improvement of the basic industry of optical components, a large number of joint ventures or domestic optical companies have emerged in China. The accuracy of their products can fully meet the requirements of the use of finished rangefinders.
- The precision manufacturing of the laser ranging module housing and the host main housing is not difficult in the domestic injection molding industry.
- The most important point is that the debugging and correction of the product by the OEM can completely solve the reasonable error problem in manufacturing.
Laser distance measure have been popular in China in the past year or two. Many users are using it, so how much do they know about the product? Let’s talk about measurement issues.
The measuring distance of the laser distance meter is a point-to-point measurement. In other words, it is the distance from the reference end of your laser distance meter to the laser pointer. Let me give an example to illustrate that your rangefinder is placed in a set location and needs to be measured on a wall with a relatively large slope in front. If you use two BOSCH rangefinders of the same brand to measure, it will definitely be Get different data. So is the accuracy of BOSCH’s instrument poor? Obviously not. Because the laser points measured by your two machines do not match the points on the wall. Some people may ask why my two instruments are placed at the same measuring point. First of all, because of the slope of the wall. In fact, for instruments produced by the same manufacturer, the laser dots are inconsistent due to inevitable accessory errors, but the manufacturer has dealt with this error through program correction. Of course, this treatment is within the allowable error range for qualified accessories.
Regarding the error of the laser distance meter, the error is 1 millimeter within 1 meter, then is the error of 100 millimeters at 100 meters? This simple superimposed understanding is obviously wrong. As an enterprise that develops, researches, and manufactures rangefinders, it will certainly not let such machines circulate to the market. This problem of increasing the stacking error according to the range will definitely be judged as a non-conforming product during the debugging process of the production plant. This is the inaccuracy caused by the excessive error of the accessories, and there is no way to correct it to the required accuracy during factory debugging. For a qualified product, the large-range error and the small-range error are basically in the same range, and the error increase is within 2 MM levels.
After more than ten years of precipitation and development in China, the rangefinder industry has reached a high level. Domestic machines have risen rapidly with excellent quality and ultra-low prices. As a user, whether you like Bosch, Leica, Leica, Tuya Obtained TRUEYARD, Stanley STANLEY imported brands, or domestically produced machines such as DEVON, CEM, XNOVO, TYRRY and other domestic machines, will have the magic of distance measurement to bring you extraordinary feelings. Let technology change life and become a real thing.
