penderia suhu frekuensi radio Menggunakan penderia gentian optik

Peranan penderia suhu ablasi frekuensi radio

Dalam sistem frekuensi radio, elektrod frekuensi radio ialah peranti utama yang digunakan untuk menghubungi atau mendekati tisu manusia yang dirawat dan melepaskan tenaga frekuensi radio. Elektrod frekuensi radio digunakan untuk menukar isyarat frekuensi radio kepada medan suhu dan merawat tisu manusia melalui kesan haba.
Disebabkan oleh fakta bahawa tisu ablated biasanya terletak di dalam badan dan tidak kelihatan dan boleh disentuh oleh doktor seperti pembedahan tradisional, pengukuran suhu dan impedans tisu memainkan peranan yang sangat penting dalam menentukan keadaan ablasi tisu. Dalam teknologi sedia ada, pelbagai sistem ablasi frekuensi radio mempunyai satu atau lebih penderia yang dipasang berhampiran elektrod frekuensi radio, tipikal yang penderia suhu dan sensor impedans. Antaranya, penderiaan suhu digunakan untuk memantau tahap pemanasan tisu, untuk mengawal proses ablasi dan menilai kesan ablasi. Selain tujuan yang sama, pemantauan impedans juga boleh membantu dalam menentukan status hubungan antara probe dan tisu dalaman. Contohnya, jika impedans adalah tinggi semasa pergerakan kuar, ia mungkin disebabkan oleh detasmen probe dan tisu daripada sentuhan, dan doktor boleh melaraskan kedudukan probe dengan sewajarnya. Maklum balas arus dan voltan biasanya digunakan dalam sistem kawalan gelung tertutup masa nyata komputer untuk mengawal proses ablasi.

Jenis ablasi RF penderia suhu

Penderia suhu konvensional, seperti termokopel dan termistor, are made of metal conductive materials. Conductive materials generate induced currents under high-frequency electromagnetic fields. Based on the principle of electromagnetic induction, they produce discharge phenomena or their own temperature increases, causing serious interference in temperature measurement, resulting in significant errors in temperature readings or inability to perform stable temperature measurements. Dalam teknologi sedia ada, infrared temperature measurement can also be used for temperature measurement in radio frequency environments, but it has certain limitations. The measured temperature point must be within the visible range of the infrared sensor, and infrared temperature measurement can only measure the surface temperature of objects; The accuracy of infrared temperature measurement is affected by the emissivity of the surface material of the object. Different materials of the object being measured result in different infrared emissivity, leading to different measured temperature values. Fluorescence temperature measurement can overcome some of the shortcomings of the above methods. During measurement, the fluorescent material is placed in contact with the surface of the object being measured, and an excitation light source is input from the other end of the optical fiber. The excitation light is transmitted through the optical fiber to the head to activate the fluorescent material. After the excitation light pulse, the afterglow of the fluorescent material is exported from the original optical fiber, filtered out the spectrum, and its afterglow time constant is measured to convert the temperature of the object being measured.

RF fluorescence fiber optic temperature sensor

Technical parameters of peranti pengukuran suhu gentian optik pendarfluor

Menyediakan 1-8 position DIP switches
Provide two switch signal outputs
Julat pengukuran suhu: -40 ℃~200 ℃
Ketepatan pengukuran suhu: ± 1 ℃
Temperature measurement resolution: 0.1 ℃
Bilangan saluran: 3 saluran (can be expanded to 16 saluran)
Antara muka komunikasi: dual RS485 communication interface
Temperature measurement frequency: 1Hz

AC/DC universal power supply: wide voltage 100-300V/50Hz
Penggunaan kuasa<6W
Communication protocol: Standard Modbus RTU
Saiz pemasangan: 123.5mm x 48mm (length x width)
Operating temperature: -20 ℃~65 ℃
Suhu penyimpanan: -40 ℃~85 ℃
Gentian optik sensing probe with a withstand voltage of 100KV (40mm menahan panjang, 5min withstand time) and an inspection report issued

Sensor suhu gentian optik, Sistem pemantauan pintar, Pengeluar gentian optik yang diedarkan di China