摘要
由全反射定律知,光波不是绝对地在界面上被全部反射回第一介质,而是透入第2种介质一定深度,并沿着界面流过一定深度后重新返回第一介质,沿反射光方向射出,即在第2种介质中存在隐失波(EW)。由朗伯-比尔(Lambert-Beer)定律知,当入射光的波长λ处于第2介质的吸收波长附近,则会出现光的吸收,造成隐失波能量的损耗,致使全反射率小于1,产生衰减全反射现象。该文从这一物理现象和理论出发,将光反射能量的大小与具有实用意义的电解液的浓度测量联系起来,而电解液的浓度又与铅酸蓄电池剩余容量有着一一对应的函数关系,从而通过测量铅酸蓄电池电解液浓度就可知晓蓄电池的容量状态。实验研究表明,此法能很好地实现铅酸蓄电池容量的在线检测。该传感器具有测量准确,反应灵敏,使用寿命长等优点,可广泛用于汽车铅酸蓄电池电量测试、电力行业的工业铅酸蓄电池电量测试、溶液浓度测试、海水的盐度测试,具有广阔的应用前景。
According to the total reflection law, we can see that the optical wave is not absolutely reflected into the first medium on the interface, but permeate into the second species medium with a certain depth. When returns to the first medium it has flowed through a certain of depth along the interface, ejecting along the reflected light direction, which is evanescent wave（EW） exists in the second medium. On the other hand,according to the LambertBeer law, we can also see the appearance absorption of light, causing loss of evanescent wave light energy, making the total reflectivity less than 1, generating the attenuated total reflection（ATR） phenomena, when the incident light wavelength A nearby the absorption wavelength of the second medium. Just according to the physical phenomena and the theory, this paper makes the reflex energy relate to the concentration testing of the electrolyte, at the same time concentration of the electrolyte is related to the residual capacity of lead-acid battery on a corresponding function relation. So we can know the capacity state of the lead-acid batter according to the measurement on the electrolyte＇s concentration. The results of the experiment and theory analyses show that this method is easy to realize the on-line testing of the capacity of lead-acid battery. This sensor has many merits such as precise measurement, sensitive reaction, long-life use etc. It can be widely used in the electric capacity testing of the automobile lead-acid batter, the electric capacity testing of the industry lead-acid battery, liquor＇s concentration testing and salinity testing of the sea with bright future.
出处
《压电与声光》
CSCD
北大核心
2009年第5期652-655,共4页
Piezoelectrics & Acoustooptics
基金
重庆市教委应用基础基金资助项目(KJ090620
KJ080604)
