【摘要】：提出了一套基于FPGA(fiber-Bragg-grating)和DS18B20的溫度布拉格光柵的波長標定方法�；贒S18B20對外界溫變的實時響應特性,將數(shù)字溫度傳感器DS18B20與連接了光譜儀的溫度光纖布拉格光柵FBG置于同一溫度場中,以現(xiàn)場可編程門陣列FPGA(field-programablegate-array)作為數(shù)據(jù)處理和控制芯片,設計了通過串口發(fā)送智能指令對溫場變化的實時監(jiān)控和顯示系統(tǒng)。方法中不需要溫箱進行恒溫控制,降低了FBG波長標定的成本及功耗。實驗表明,標定出的波長-溫度曲線線性度為0.999,測得光柵的溫度靈敏度系數(shù)為9.899pm/℃,與用恒溫箱測得的結果10.468pm/℃相差0.569pm/℃,在系統(tǒng)允許誤差0.619pm/℃范圍內(nèi),驗證了該方法的準確性。
[Abstract]:A wavelength calibration method of temperature Bragg gratings based on FPGA (fiber-Bragg-grating) and DS18B20 is proposed. Based on the real-time response of DS18B20 to external temperature variation, the digital temperature sensor DS18B20 and the temperature fiber Bragg grating FBG connected to the spectrometer are placed in the same temperature field. Using the field programmable gate array FPGA (field-programablegate-array) as the data processing and control chip, a real-time monitoring and display system for the temperature field change by sending intelligent instructions through serial port is designed. The constant temperature control of the temperature box is not needed in the method, which reduces the cost and power consumption of FBG wavelength calibration. The experimental results show that the linearity of the calibrated wavelength-temperature curve is 0.999, and the temperature sensitivity coefficient of the grating is 9.899pm/ 鈩，

本文編號：2503986