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TDLAS检测系统的ARM主控型激光驱动电路的设计
资料介绍
可调谐激光二极管吸收光谱技术（TDLAS）是一种利用激光二极管的波长扫描和电流调谐特性对气体进行测量的技术，具有高选择性、高分辨率、高反应速度、高灵敏度等优点。TDLAS检测系统通常基于谐波检测的原理，通过高频调制某个依赖于频率的信号，使其扫过待测气体的吸收峰，再以调制频率的倍频作为参考信号进行信号处理。为了满足TDLAS检测系统对激光器驱动的需要，本文以ARM7系列的LPC2138为主控器，通过将DAC8830产生的锯齿波扫描信号和AD9958产生的一路正弦调制信号进行叠加，来实现TDLAS检测系统激光器的驱动。
Tunable Diode Laser Absorption Spectroscopy （TDLAS） is a technique used in gas detection based on the laser’s characteristics of wavelength scanning and current tuning. It has high selectivity, high resolution, high sensitivity and fast reaction speed. The TDLAS detection system is based on the principle of the harmonic detection. The principle is a technique making a signal modulated by a high frequency one scanning for the absorption peak of the gas to be detected, and then processing the detected signal using double frequency of the modulation signal as the reference. In this paper, we designed a laser driver circuit for the TDLAS detection system using the LPC2138 micro-contro...
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| 文件名 | 大小 |
| TDLAS检测系统的ARM主控型激光驱动电路的设计.pdf | 840K |
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