BAIJIAN - Third party testing organization
The diameter of the outer circle of a circular object is called the outer diameter、 which is usually measured directly with a vernier caliper. The symbol Φ。 In engineering、 the outer diameter is usually an important indicator of quality issues、 so measuring it is a very important process. The traditional measurement methods are mostly contact method、 including caliper、 vernier caliper、 spiral micrometer、 resistance method、 and weighing method. There are also optical methods used、 such as optical microscopy、 interferometry、 scanning、 projection amplification、 comparison、 etc. Most of the above detection methods can basically meet production needs、 but for high-precision instrument measurement、 the drawbacks are also reflected: low detection speed、 low production efficiency、 high labor intensity、 and cannot keep up with the current needs of automated production. And contact measurement is very easy to cause secondary damage to the rolled material. The measurement results are prone to errors. The most commonly used products at home and abroad are laser scanning methods for measurement、 and there are also CCD photoelectric measurement methods for measurement. Among them、 the laser scanning measurement method has higher measurement accuracy、 but the laser scanning measurement method is more suitable for static high-precision measurement. When used for dynamic measurement、 the diffraction fringes will quickly move and become inaccurate due to the shaking of the measured rolling material、 and it is also difficult to quickly obtain measurement results. At the same time、 it also has disadvantages such as complex structure、 expensive structure、 and vulnerable rotating parts. CCD photoelectric measurement method adopts 4.7 μ The high-precision measurement method with m pixel resolution can effectively perform non-destructive measurements on the tested rolled material、 with low production costs and can achieve ultra-high precision measurements of 0.003mm. It can meet the measurement needs of various rolled materials、 and the use of adjustable spacing double measuring heads allows for a larger measurement range of rolled materials、 which is a super large range of rolled material measurement achieved by laser scanning method
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China