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公开(公告)号：US4644798A
公开(公告)日：1987-02-24
申请号：US770664
申请日：1985-08-28
申请人： Hisashi Tamura , Terutaka Hirata , Tetsu Odohira , Tadahiro Ogawa
发明人： Hisashi Tamura , Terutaka Hirata , Tetsu Odohira , Tadahiro Ogawa
CPC分类号： G01L9/0075 , G01L9/125
摘要： A capacitive type converter device, such as used for measuring pressure, comprising first and second rectifying circuits, each including an operational amplifier with a non-inverting input terminal connected to a reference point, to which a variable condenser is connected, the variable condenser having a capacitance which varies in response to a force being measured, such as pressure, and to which a reference condenser is connected, the reference condenser having a capacitance which is fixed independent of the force being measured. The device further comprises an oscillator, whose oscillation output is applied to the variable and reference condensers,and which is controlled by a control means in response to output of the first rectifying circuit, or in response to the output of the second rectifying circuit together with the output of the first rectifying circuit, whereby an output responsive to the capacitance of the variable condenser is obtained from the output of the second rectifying circuit, or an output relating to the difference between the capacitances of the condensers is obtained from the outputs of the first and second rectifying circuits. The device eliminates adverse influences of stray capacitances, non-linearity, offset signals, and parallel capacitances and forward voltages.
摘要翻译： 一种诸如用于测量压力的电容型转换器装置，包括第一和第二整流电路，每个包括具有连接到可变电容器的参考点的非反相输入端的运算放大器，可变冷凝器具有 响应于被测量的力例如压力而变化的电容，参考电容器连接到其上，参考电容器具有独立于被测量的力而固定的电容。 该装置还包括振荡器，其振荡输出被施加到可变和参考电容器，并且响应于第一整流电路的输出而由控制装置控制，或者响应于第二整流电路的输出连同 第一整流电路的输出，从第二整流电路的输出获得响应于可变电容器的电容的输出，或者从电容器的电容之间的差异获得与电容器的电容之间的差异的输出 第一和第二整流电路。 该器件消除杂散电容，非线性，偏移信号，并联电容和正向电压的不利影响。
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2.发明授权
公开(公告)号：US4372659A
公开(公告)日：1983-02-08
申请号：US285276
申请日：1981-07-20
申请人： Tadahiro Ogawa
发明人： Tadahiro Ogawa
摘要： This invention relates to an apparatus for taking a single, continuous photograph of the exterior of an article consisting of a center disk on which an article is to be placed and a larger concentric disk on which a slit camera, a light projector for illuminating the exterior of said article, a reflector for reflecting the light from said illuminated surface into the slit camera and a non-reflective background are placed, wherein either of said disks can rotate against the other.
摘要翻译： 本发明涉及一种用于拍摄物品外部的单一连续照片的装置，该物品由其上放置有物品的中心盘和较大的同心盘组成，其上设有狭缝相机，用于照亮外部的光投影仪 的反射器，用于将来自所述照明表面的光反射到狭缝相机中的反射器和非反射背景，其中所述盘中的任一个可以相对于另一个旋转。
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