公开(公告)号：US5793199A

公开(公告)日：1998-08-11

申请号：US748471

申请日：1996-11-08

申请人： Riichiro Kasahara ,  Yoshihisa Nozawa ,  Masanori Miyoshi ,  Osamu Kitamura

发明人： Riichiro Kasahara ,  Yoshihisa Nozawa ,  Masanori Miyoshi ,  Osamu Kitamura

IPC分类号： G01N15/06 ,  G01N27/72 ,  G01N33/28 ,  G01N27/74 ,  G01R33/12 ,  G08B21/00

CPC分类号： G01N15/0656 ,  G01N27/72 ,  G01N33/2858

摘要： A method of determining a concentration of magnetic powderly material in a sample is disclosed. In this method, a pair of series-connected exciting coils are disposed in such a manner that magnetic fields generated from the respective exciting coils oppose to each other. A detecting coil is disposed at a position where the magnetic fields from the pair of exciting coils cancel out each other. A sample mixed with magnetic powder is inserted into one of the pair of exciting coils. Then, the method detects a voltage induced in the detecting coil in association with the insertion of the sample into the exciting coil and determines the concentration of the magnetic powder in the sample based on the detected voltage.

摘要翻译： 公开了一种确定样品中磁性粉末材料浓度的方法。 在这种方法中，一对串联的励磁线圈以从各个励磁线圈产生的磁场彼此相对的方式设置。 检测线圈设置在来自一对励磁线圈的磁场彼此抵消的位置处。 将与磁粉混合的样品插入一对励磁线圈中的一个。 然后，该方法与检测线圈中感应的电压相关联，并将样品插入到励磁线圈中，并基于检测到的电压确定样品中的磁粉浓度。

公开(公告)号：US4885929A

公开(公告)日：1989-12-12

申请号：US254185

申请日：1988-10-06

申请人： Riichiro Kasahara ,  Tadashi Takada

发明人： Riichiro Kasahara ,  Tadashi Takada

IPC分类号： G01N27/00 ,  G01N1/00 ,  G01N27/12 ,  G01N27/416 ,  G01N33/00

CPC分类号： G01N33/0039 ,  G01N27/12

摘要： An ozone gas sensor comprising a film type semiconductor element including a substrate and a semiconductor film consisting of a metallic oxide formed on the substrate, and a layer of silica formed on a surface of the film type semiconductor element. At least one thin film layer of one or a plurality of types selected from metals and metal oxides is interposed between the semiconductor film and the layer of silica.