High Frequency Laser Ranging Sensor
The module operates with a laser wavelength of 905 nanometers, falling within the near-infrared spectrum, which ensures minimal transmission loss in the atmosphere and poses negligible risk of harm to human eyes. Laser sensors with a 700-meter (standard specs) range typically offer high accuracy and extensive ranging capabilities, making them well-suited for applications requiring long-distance measurements. These sensors find widespread use in military, aerospace, surveying, geological exploration, and other related fields.
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On June 18th, the national standard revision meeting for "Hongmu" (GB/T 18107-2000) was held, marking the official start of the revision process for the "Redwood" national standard. The current standard has been in place since May 2000, and after 13 years, it is now being updated to address several key areas. One major focus of the revision includes improving the list of redwood species and refining the methods used to identify them. Additionally, species listed under the CITES Convention are expected to be incorporated into the revised standard to better regulate the trade of redwood materials.
During the preparatory meeting of the drafting group, industry representatives and experts expressed caution regarding any significant changes to the scope of redwood species. While some believe that adjusting the coverage could help align the standard with market realities, others warn against over-expanding or reducing the list, as this could create confusion among consumers and impact the market significantly. The determination method for redwood is also under intense scrutiny, with concerns about its accuracy and reliability.
The current standard outlines four criteria for identifying redwood: plant taxonomy, wood structure, air-dry density, and heartwood color. However, experts argue that these methods may not be sufficient due to natural variations in wood characteristics. For instance, even if a tree belongs to the correct genus, its structure or density might not meet the standard, leading to potential misidentification. This highlights the need for more precise and scientifically sound testing procedures.
In addition to species identification, there are ongoing discussions about the practicality of the standard in real-world applications. Many companies report that the current testing methods are limited, often relying on sample-based analysis rather than comprehensive evaluation of entire furniture pieces. This can lead to inconsistencies, as certain parts of a piece may contain sapwood, which is not always prohibited but can affect the overall quality assessment.
Industry leaders emphasize the importance of making the standard more operable and user-friendly. They hope that the revised version will provide clearer guidelines for both manufacturers and consumers, ensuring transparency and fairness in the market. Some suggest that incorporating origin information and improving the testing process could help reduce fraud and enhance trust in the industry.
Overall, the revision of the "Redwood" standard represents a critical step toward modernizing the regulation of this valuable resource. With careful consideration of scientific advancements and market needs, the goal is to create a more reliable, accurate, and practical framework for the redwood industry.