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公开(公告)号：US4891519A
公开(公告)日：1990-01-02
申请号：US257635
申请日：1988-10-14
申请人： Tadashi Nohira , Tsuneo Imatsu , Ikuzo Kagami
发明人： Tadashi Nohira , Tsuneo Imatsu , Ikuzo Kagami
CPC分类号： G01N21/534 , G01N21/8507 , G01J1/1626 , G01J2001/444 , G01N2201/0612 , G01N2201/0806
摘要： A turbidimeter for measuring a turbidity of a test liquid including a hollow main body having openings formed at its lower end through which the test liquid is introduced into a measuring optical path within the main body, a semiconductor laser diode arranged in the main body at its upper end and emitting a laser light, a first prism arranged within the main body and guiding the laser light into the measuring optical path, a second prism arranged within the main body and guiding light emanating from the measuring optical path to the upper end of the main body, first and second semiconductor photodiodes arranged within the main body at its upper end such that the light emanating from the second prism is exclusively made incident upon the first semiconductor photodiode, and first and second operational amplifiers arranged within the main body at its upper end and amplifying output signals supplied from the first and second semiconductor photodiodes, respectively. Output signals generated from the first and second operational amplifiers are supplied to a differential amplifier to derive a difference therebetween, the difference corresponding to the turbidity of the test liquid. The differential amplifier is arranged remote from the main body, so that any error in the measured turbidity due to the temperature variation can be compensated for.
摘要翻译： 一种浊度计，用于测量包括中空主体的测试液体的浊度，所述中空主体在其下端形成开口，所述测试液体通过所述开口被引入到所述主体内的测量光路中;半导体激光二极管，其设置在所述主体中 上端并发射激光，第一棱镜布置在主体内并将激光引导到测量光路中，第二棱镜布置在主体内，并将从测量光路发出的光引导到测量光路的上端 主体，第一和第二半导体光电二极管，其上端设置在主体内，使得从第二棱镜发出的光仅专门入射在第一半导体光电二极管上，第一和第二运算放大器布置在主体的上部 分别结束和放大从第一和第二半导体光电二极管提供的输出信号。 从第一和第二运算放大器产生的输出信号被提供给差分放大器以导出它们之间的差异，该差值对应于测试液体的浊度。 差分放大器远离主体布置，可以补偿由于温度变化引起的测量浊度的任何误差。
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