-
公开(公告)号：US4800759A
公开(公告)日：1989-01-31
申请号：US91219
申请日：1987-08-31
CPC分类号： G01L9/065
摘要： A semiconductor pressure converter wherein a drive voltage is applied to a power supply end of a shearing type gage formed at the strain generating part of a semiconductor diaphragm, and an output voltage appearing at the output end thereof is amplified with an amplifier. The zero point is adjusted by applying a bias voltage to the amplifier which is related to the drive voltage. The span is adjusted without interference to the zero point by changing the feedback voltage of the amplifier. Linear compensation, temperature zero point compensation and temperature span compensation are attained without any mutual interference.
摘要翻译： 一种半导体压力转换器，其中驱动电压被施加到形成在半导体膜片的应变发生部分的剪切型计量器的电源端，并且其输出端出现的输出电压用放大器放大。 通过将偏置电压施加到与驱动电压相关的放大器来调整零点。 通过改变放大器的反馈电压来调节量程而不影响零点。 实现线性补偿，温度零点补偿和温度范围补偿，没有任何相互干扰。
-
12.发明授权Device for limiting switching frequency of a parallel capacitor reactive power compensation network 失效用于限制并联电容器无功补偿网络开关频率的装置
公开(公告)号：US4771225A
公开(公告)日：1988-09-13
申请号：US22789
申请日：1987-03-06
申请人： Tadashi Nishikawa
发明人： Tadashi Nishikawa
CPC分类号： H02J3/1864 , Y02E40/12
摘要： A reactive power compensation device has minimum residual reactive power and avoid hunting. The compensation device is connected to an AC power supply network with a variable reactive load. Capacitor banks are connected in parallel with the load, and a pertinent number of banks are switched on and off periodically at a pre-determined time interval. The reactive power in both the load and the capacitor banks are detected and used for controlling the capacitor banks.
摘要翻译： 无功补偿装置具有最小的残余无功功率，避免狩猎。 补偿装置连接到具有可变无功负载的交流电源网络。 电容器组与负载并联连接，并且以预定的时间间隔周期性地打开和关闭有关数量的存储体。 检测负载和电容器组中的无功功率，并用于控制电容器组。
-
公开(公告)号：US4524622A
公开(公告)日：1985-06-25
申请号：US514864
申请日：1983-07-18
CPC分类号： G01N29/4445 , G01N29/0618 , G01N29/0645 , G01N29/11 , G01N29/225 , G01N29/265 , G01N29/38 , G01N2291/044 , G01N2291/2693
摘要： A method and an apparatus of ultrasonic flaw detection suitable for detecting internal cavern defects of a material, the method involving the mounting on a rotary body of a plural number of skew probes in equidistant positions in the circumferential direction of the rotary body to provide a corresponding number of channels for transmitting and receiving ultrasonic beams in a direction intersecting the axis of rotation of the rotary body at different depths in an inspection zone of a material positioned opposingly to the probes. The rotary body is turned to revolve the probes through 360.degree. about the axis of rotation while transmitting and receiving the ultrasonic pulses. Selected flaw patterns are produced from the peak values of the echoes received at the detection gates of the respective channels in relation with the direction of incidence of the ultrasonic beams. The direction, inclination, size and depth of a detected defect is deciphered by correlation processing of the detected flaw patterns with a number of predetermined reference patterns in order to provide for judging the harmfulness of the detected defect.
摘要翻译： 一种用于检测材料的内部洞穴缺陷的超声波探伤的方法和装置，该方法和装置包括在旋转体的圆周方向等距位置上安装多个偏斜探针的旋转体的旋转体，以提供对应的 在与探针相对的材料的检查区域中，在与旋转体的旋转轴线的旋转轴线相交的方向上发送和接收超声波束的通道数量。 旋转体旋转以使探头围绕旋转轴旋转360°，同时发射和接收超声波脉冲。 从相应通道的检测门处接收到的回波的峰值与超声波束的入射方向相关，产生选择的缺陷图案。 检测到的缺陷的方向，倾斜度，尺寸和深度通过检测到的缺陷图案与多个预定参考图案的相关处理来解密，以便提供用于判断检测到的缺陷的有害性。
-
公开(公告)号：US5009108A
公开(公告)日：1991-04-23
申请号：US423042
申请日：1989-10-18
申请人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
发明人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
CPC分类号： G01L9/0019 , G01K7/32 , H04R23/006
摘要： A vibrating type transducer wherein an H-shaped vibrator, formed integrally with a silicon substrate and having a hollow chamber provided therearound, is kept self oscillating at its natural resonance frequency together with an amplifier. A physical quantity, such as force, pressure, differential pressure, or the like, which is applied to the silicon substrate is detected by a change in the natural frequency arising at the vibrator corresponding to the physical quantity. The invention also includes a method for manufacturing such transducer using a semiconductor technique, including steps for keeping a vacuum internally in the hollow chamber, imparting an initial tension to the vibrator, and then operating the amplifier to have stable self oscillation.
摘要翻译： 一种振动型换能器，其中与硅衬底一体形成并且具有设置在其周围的中空腔的H形振动器与放大器一起以其固有谐振频率自振荡。 通过对应于物理量的振动器产生的固有频率的变化来检测施加到硅衬底的力，压力，压差等的物理量。 本发明还包括一种使用半导体技术制造这种换能器的方法，包括在中空室中内部保持真空，向振动器施加初始张力，然后操作放大器以使其具有稳定的自振荡的步骤。
-
公开(公告)号：US4966649A
公开(公告)日：1990-10-30
申请号：US424510
申请日：1989-10-20
申请人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
发明人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
CPC分类号： G01H13/00 , G01L9/0019 , Y10T29/49103
摘要： A vibrating type transducer wherein an H-shaped vibrator, formed integrally with a silicon substrate and having a hollow chamber provided therearound, is kept self oscillating at its natural resonance frequency together with an amplifier. A physical quantity, such as force, pressure, differential pressure, or the like, which is applied to the silicon substrate is detected by a change in the natural frequency arising at the vibrator corresponding to the physical quantity. The invention also includes a method for manufacturing such transducer using a semiconductor technique, including steps for keeping a vacuum internally in the hollow chamber, imparting an initial tension to the vibrator, and then operating the amplifier to have stable self oscillation.
摘要翻译： 一种振动型换能器，其中与硅衬底一体形成并且具有设置在其周围的中空腔的H形振动器与放大器一起以其固有谐振频率自振荡。 通过对应于物理量的振动器产生的固有频率的变化来检测施加到硅衬底的力，压力，压差等的物理量。 本发明还包括一种使用半导体技术制造这种换能器的方法，包括在中空室中内部保持真空，向振动器施加初始张力，然后操作放大器以使其具有稳定的自振荡的步骤。
-
公开(公告)号：US4926143A
公开(公告)日：1990-05-15
申请号：US245681
申请日：1988-09-16
申请人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
发明人： Kinji Harada , Kyoichi Ikeda , Hideki Kuwayama , Takashi Kobayashi , Tadashi Nishikawa , Tetsuya Watanabe , Takashi Yoshida
CPC分类号： G01H13/00 , G01L9/0019 , Y10T29/49103
摘要： A vibrating type transducer wherein an H-shaped vibrator, formed integrally with a silicon substrate and having a hollow chamber provided therearound, is kept self oscillating at its natural resonance frequency together with an amplifier. A physical quantity, such as force, pressure, differential pressure, or the like, which is applied to the silicon substrate is detected by a change in the natural frequency arising at the vibrator corresponding to the physical quantity. The invention also includes a method for manufacturing such transducer using a semiconductor technique, including steps for keeping a vacuum internally in the hollow chamber, imparting an initial tension to the vibrator, and then operating the amplifier to have stable self oscillation.
摘要翻译： 一种振动型换能器，其中与硅衬底一体形成并且具有设置在其周围的中空腔的H形振动器与放大器一起以其固有谐振频率自振荡。 通过对应于物理量的振动器产生的固有频率的变化来检测施加到硅衬底的力，压力，压差等的物理量。 本发明还包括一种使用半导体技术制造这种换能器的方法，包括在中空室中内部保持真空，向振动器施加初始张力，然后操作放大器以使其具有稳定的自振荡的步骤。
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.049 秒)