The Research On The Application Of The Embedded System In Optical Fiber Measurement

Nowadays, our country's information industry is developing at a phenomenal rate, through the traditional media to transfer the information have failed to meet the increased needs. The optical fiber as a new carrier has many merits, such as the lower spoilage, broader band width, larger capacity and the enough material, so it is the best choice to replace the traditional carrier. At present, the main device to detect the optical fiber is Optical Time Domain Reflector. Because in the project it is essential, so the demand is very big in our country, but the majority of instruments rely on in import. So it is not advantageous to the independence of our country's intellectual property rights. Therefore we must develop one kind of low cost, suitable project application OTDR.Firstly, this paper introduce the present situation of the optical fiber examination technology and the basic optics principle and basic principle of work, in this foundation, proposing the embedded system is the best choice to realize this function. The embedded system is a popular research area, it widely applies in the electron, the medical service, the aviation and the automobile industry. Nest I introduce the digital platform, on this basis, I raised the main chip is ADSP-BF531, and the peripheral chips are FLASH,SDRAM and CPLD. After that, I introduced how to program according to the BOXcar principle. Last, I introduced the methods of system debugging.Mainly, I emphasized the function of main chip ADSP-BF531 and the main algorithm: BOXcar algorithm. ADSP-BF531 is ADI corporation's new generation of high speed DSP product, this new product is designed for the communication and internet applications, and it can process the massive images, the sound, the text and data stream. The BOXcar algorithm is a kind of improvement algorithm, which based on the BOXcar device, it overcome a lot of shortcoming of the device.The experiments prove that this system can test the attenuation and the length of the optical fiber accurately according to the international standard.