| 1. | Im - dm : intensity modulation - direction modulation
直接强度调制 |
| 2. | Light intensity modulation
光强度调制 |
| 3. | Study of intensity modulation - direct detection laser system for detection of sound vibration
强度调制直接探测型远距离激光声探测系统研究 |
| 4. | Then , it describes the applications of intensity modulation fiber - optic sensor , interferometric fiber - optic sensor , fiber - optic grating and fiber - optic acoustic emission sensor
同时，文章阐述了强度调制型光纤传感器、干涉型光纤传感器、光纤光栅和光纤声发射传感器的应用。 |
| 5. | The paper focuses on the following work : ( 1 ) analyzes fiber sensing theory of intensity modulation ; deduces modulation formula of reflex sensor and studies its characteristics using computer ; experiments the sensing characteristics of reflex types and fiber bundles
其中的强度调制型光纤传感技术最具有实用化性，本论文将研究其调制特性并进行强度调制型光纤真空度传感实验，主要的研究工作包括： 1分析了强度调制型光纤传感原理。 |
| 6. | Fiber technology has been developed for many applications in both fiber optic communication and sensor systems . fiber sensors have presented a direction to modern measurements for their unique characteristics , among them intensity modulation fiber sensors own strong applications
光纤技术无论是在光纤通信领域还是在光纤传感领域都可称得上是一个具有革命性的技术开拓，光纤传感本身具有的优点使其成为研究热点，为现代测量技术的发展提供了一个方向。 |
| 7. | 1 . firstly , the mathematical model of fiber pair with the factors of reflector shape and inclination is established . then , the numerical simulation is fulfilled , along with a series of rules of the influence on intensity modulation property caused by multimode fiber parameters , the factors of reflector shape and inclination
然后，采用数值仿真的方法系统地研究了多模光纤参数(包括光纤对轴间距、光纤芯径和光纤数值孔径) 、反射面倾斜因子以及形状因子对rim - fos强度调制特性的影响规律。 |
| 8. | Fiber - optic fabry - perot sensor is a kind of high precision interferometric fiber - optic sensor , so this kind of sensor has a bright future . this sensor can be classified into 3 kinds of sensors by their demodulation device . these are intensity modulation / demodulation fiber - optic fabry - perot sensor , phase modulation / demodulation fiber - optic fabry - perot sensor and white - light interferometer modulation / demodulation fiber - optic fabry - perot sensor
按照信号解调装置的不同该种传感器可分为三类：强度调制解调型、相位调制解调型和白光干涉仪调制解调型光纤fp传感器，其中后两种采用宽光谱光源，是白光干涉型光纤fp传感器。 |
| 9. | Based the research on the laser beam drift feedback control technique , analysing the beam drift and its frequency components , a laser beam directional stability method is studied in the thesis in detail , with its measurement and control circuit system that combines the laser beam intensity modulation and the beam drift feedback control technique . in this method , at first the laser beam intensity is modulated with the acoustooptic modulator , then the lock - in amplifier is applied to detect and demodulate the modulating signal , at last a feedback control signal is generated by the dsp control circuit at last , including : 1
本文在原有的激光光束漂移量反馈控制准直技术的基础上,对光束漂移量信号的数据和频谱进行了分析,重点研究了一种集声光调制光强与光束漂移量反馈控制准直技术于一体的激光光束方向稳定方法及其测控电路系统,该方法通过声光调制实现光强调制,接着通过锁相放大电路检测并解调调制信号,然后通过dsp控制电路进一步对光束的漂移量进行反馈控制。 |
| 10. | The paper analyzes in detail the mechanics and optics theory . in the light of the characteristic of the intensity modulation optical fiber sensor , the reference - way is presented to compensate the error signals which are caused by the bias light , dark current of photoelectric detector , temperature drift of pre - amplifier
文中详细分析了这种传感器的力学和光学工作原理，并且针对所选用的强度调制型光纤传感器的工作特点，提出采用参考通道补偿由于背景光、光电探测器的暗电流、前置放大器温漂等因素引起的误差。 |
