一种现场实时折射计已被开发用于测量吸收机中的吸收剂浓度。吸收液的折射率是通过测量浸泡在溶液中的光纤电缆的光损耗来确定的。通过从硬包层光纤的中心移除一部分包层，露出一段纤芯，对光纤进行了修改。纤维芯的暴露部分放置在吸收机内需要测量吸收浓度的点上。所有改性光纤的入口面都用光源照明。测量从每根光纤的纤芯到光纤周围的吸收体溶液损失的光量，该光量与溶液的折射率直接相关。 因为溶液的折射率是温度的函数，所以在每根暴露的光纤附近放置一个热电偶结，以测量和补偿局部溶液温度。通过使用独立确定的方程式，根据折射率确定吸收液的成分。单位:双引文:研讨会，ASHRAE交易，1986年，第92卷，pt。2B，波特兰，或

An in-situ, real-time refractometer has been developed for the measurement of absorbent concentration in absorption machines. The refractive index of the absorber fluid is determined by measuring light loss from optical fiber cables that are immersed in the solution. The optical fibers have been modified by removing a portion of the cladding from the center of hard clad fiber optics to expose a segment of the core. The exposed portions of the fiber cores are placed at points within an absorption machine for which the measurement of absorbent concentration is desired. The entrance face of all modified fibers is illuminated with a light source. The amount of light lost from the core of each fiber to the absorber solution surrounding the fiber is measured and is directly related to the refractive index of the solution. Because the refractive index of a solution is a function of temperature, a thermocouple junction is placed adjacent to each of the exposed fibers to measure and compensate for local solution temperature. The composition of the absorber fluid is determined from the refractive index through use of an independently determined equation.Units: Dual