【摘要】 本文详细报道了用折射率调制型光纤传感器测量溶液浓度的原理及实验装置．为了消除光源光强的不稳定性对测量精度提高的影响，我们提出用光学双稳态装置稳定光源的输出功率并将它用于实际测量中，实验结果表明：本方法用于测量溶液的浓度在灵敏度、精度和稳定度方面都有较大的提高，并且可用于在线监测．更多还原

【Abstract】 This paper introduces the principle and the experimental device of measuring solution density by use of the refractive index modulation typed optic fiber sensor in detail.Because the sensitivity,precision and stability of measuring results of the optical sensor are mainly decided by the stability of output light intensity of the optical source,we present to stabilize the output light intensity by using the bistable optical device and use this new device with refractive index modulation typed sensor to measure the solution density.The experimental results show that the sensitivity,precision and stability of the measuring results using the optic fiber sensor are largely improved and the device can be used on line measurement.更多还原