What is a fiber optic grating demodulator-INNO

Apakah a penyahmodulator parut gentian optik

Dalam banyak majlis khas, penderia parut gentian optik mempunyai banyak ciri yang tidak dimiliki oleh penderia tradisional. Kisi Fiber Bragg, sebagai sensor pintar, mempunyai kelebihan saiz kecil, ringan, rintangan kakisan, rintangan yang kuat terhadap gangguan elektromagnet, penyepaduan yang mudah, dan struktur ringkas. Ia boleh ditanam di dalam objek dan bahan yang diuji untuk mengesan kuantiti fizikal seperti tekanan, suhu, tekanan, ketegangan, kadar aliran, kadar aliran, dan kelikatan.

Kisi Fiber Bragg (FBG) sensor telah menjadi komponen sensor yang sangat baik, mampu mengukur pelbagai kuantiti fizik seperti suhu, ketegangan, dan tekanan. Ia mempunyai kelebihan sensitiviti yang tinggi, tiada gangguan elektromagnet, prestasi kalis air yang baik, saiz kecil, ringan, kebolehpercayaan yang tinggi, dan boleh tertanam dalam bahan komposit. FBG memperoleh maklumat penderiaan dengan memodulasi panjang gelombang pusat pantulan melalui parameter luaran. Oleh itu, kunci kepada penyahmodulasi dalam sistem penderiaan FBG adalah untuk mengukur perubahan dalam panjang gelombang tengah puncak pantulannya.

Pada masa ini, FBG center wavelength demodulation methods can be divided into two categories: (1) methods based on grating diffraction spectroscopy measurement or tunable laser scanning, such as using CCD detection, tunable filters, dll; (2) Using fixed filters, such as edge filtering method. The use of tunable lasers has problems such as slow detection speed and high system cost; The edge filtering method has problems such as inconvenient multi-point multiplexing and conflicting range and accuracy. The CCD detection method using planar or volume gratings has been widely used due to its advantages such as fast spectral detection speed, low system cost, and simple multi-point multiplexing.

Principle of Fiber Bragg Grating Demodulator

The core work of demodulation for fiber optic grating sensing signals is to read and transform the return values of different center wavelengths of the fiber optic grating, and then obtain the changes in external information. The light from a broadband light source is incident into the sensing fiber through a 50:50 coupler with a certain bandpass. There are multiple FBG sensors with different reflection center wavelengths in the sensing fiber, and FBG sensors with different reflection center wavelengths are reflected at wavelengths that meet the Bragg condition, while light transmission at wavelengths that do not meet the condition occurs. At this point, external parameters are modulated into the reflected wavelength and enter the demodulator through a coupler for demodulation. The demodulator used in this article is based on the principles of multi-level diffraction gratings and linear array infrared CCD. The optical path adopts the principle of transmission grating dispersion. The reflected spectrum is processed by dispersion and projected onto the photosensitive surface of the linear array photodetector. Oleh itu, the reflected spectrum is converted into electrical signals on different pixels of the linear array photodetector, which are used for subsequent demodulation.

Price of Fiber Bragg Grating Demodulator

1. Looking at fiber optic sensor brands, a good sensor brand will be promoted in the market, and over time, it will gradually become a brand. There is still a considerable gap between branded and non branded products in terms of after-sales and service. Brand products value reputation and reputation, so fiber optic sensor brands are still good.

2. Kualiti, a high-quality fiber Bragg grating demodulator is not comparable to other unbranded products in terms of user experience. A high-quality product is very strict in production, which will result in sales prices that cannot be compared with inferior products and will be slightly more expensive.

3. Search more, you can search for relevant fiber optic demodulator products online, learn more about the quotations provided by different fiber optic grating sensor companies, and choose a product that you think is suitable for your application range. The market is very large, so compare and find some more favorable products.

Fiber Bragg grating demodulators have a wide range of applications in fields such as power energy, petrokimia, bangunan perindustrian dan awam, dan bidang lain yang memerlukan pemantauan suhu dan tekanan masa nyata. Penggunaan teknologi penderiaan parut gentian optik boleh mencapai ukuran jarak jauh dan pemantauan, dengan ciri-ciri julat ukuran yang luas, ketepatan yang tinggi, dan resolusi tinggi. Ia mempunyai kelebihan dalam persekitaran yang keras dengan gangguan elektromagnet yang kuat atau bahan mudah terbakar dan meletup.
Pengindustrian dan promosi skala penderia gentian optik menyesuaikan diri dengan keperluan pembangunan ekonomi negara. Penyelidikan dan perindustrian teknologi sensor gentian optik telah menjadi penderia yang digunakan dengan baik dalam industri kuasa dan lain-lain. Secara tradisinya, parut Bragg gentian didemodulasi menggunakan spektrometer, monokromator, dan meter panjang gelombang. Namun begitu, sistem penyahmodulasi ini mempunyai kelemahan seperti kos yang tinggi dan volum yang besar. Oleh itu, many simpler and more practical demodulation methods have been proposed. There are mainly interference demodulation technology, linear edge filtering technology, matched filtering demodulation technology, tunable filtering demodulation technology, dll. The interferometric demodulation technology has high measurement accuracy, but the measurement range is limited by the free spectral range of the interferometer. The testing range of linear edge filtering technology is inversely proportional to the resolution, while the matching filtering method is simple and practical, but the tuning range is small. The demodulation method based on tunable FP filters has advantages such as high sensitivity, high light energy utilization, operasi mudah, wide tuning range, and good system stability. A wavelength displacement monitoring system suitable for engineering applications.