公开(公告)号：US20030235233A1

公开(公告)日：2003-12-25

申请号：US10461365

申请日：2003-06-16

Applicant: NOHKEN INC.

Inventor： Hiroshi Kawakatsu

IPC: G01K011/22

CPC classification number: G01F23/2967 ,  G01K7/203 ,  G01N2291/02836

Abstract: A magnet is provided to a vibrating plate within a detection pipe unit and an electromagnet is placed opposite to the magnet with a slight gap therebetween. A drive circuit applies, to a coil at every predetermined measurement cycle, an alternating current at a frequency which is swept over a predetermined range centered at a resonance frequency of the vibrating plate. When the alternating current is applied, a phase comparison circuit detects a change in phase that is caused according to whether or not an object contacts the vibrating plate. A microcomputer determines presence/absence of the object based on the detected change in phase, measures the temperature based on the detected change in phase in a former half cycle of the predetermined measurement cycle and changes the swept frequency based on the result of measurement of the temperature in a latter half cycle of the predetermined cycle.

Abstract translation: 将磁体设置在检测管单元内的振动板上，并且电磁体与磁体相对放置，其间具有微小的间隙。 驱动电路在每个预定的测量周期向线圈施加以以振动板的共振频率为中心的预定范围扫过的频率的交流电。 当施加交流电流时，相位比较电路根据物体是否与振动板接触而检测相位变化。 微型计算机基于检测到的相位变化来确定物体的存在/不存在，基于检测到的预定测量周期的前半周期中的相位变化来测量温度，并且基于测量结果来改变扫频 在预定周期的后半周期中的温度。

公开(公告)号：US20070013578A1

公开(公告)日：2007-01-18

申请号：US11486086

申请日：2006-07-14

Applicant: Tadamitsu Iritani ,  Kazuhiro Wakabayashi

Inventor： Tadamitsu Iritani ,  Kazuhiro Wakabayashi

IPC: G01S13/08

CPC classification number: G01S13/36 ,  G01S2007/356

Abstract: A transmission unit emits an electromagnetic wave having the same frequency f as an output signal from a sending unit in a direction of a measurement axis. A detecting unit performs synchronous detection on a reflected wave detected by a directional coupler by an in-phase signal and a quadrature signal of the transmission signal, and by extracting DC component from the detection signal, detects the in-phase component and quadrature component of the reflected wave. An analysis signal generating unit mixes the in-phase component and quadrature component of the reflected wave and signals having periodicity corresponding to a prescribed distance, and using only one of the resulting side bands, generates an analysis signal. Fourier transform unit finds distance to the object of measurement from a profile obtained by Fourier transform of the analysis signal.

Abstract translation: 传输单元沿着测量轴的方向发射具有与来自发送单元的输出信号相同的频率f的电磁波。 检测单元通过定向耦合器通过同相信号和发送信号的正交信号对反射波进行同步检测，并且通过从检测信号中提取DC分量来检测同步分量和正交分量 反射波。 分析信号生成单元将反射波的同相分量和正交分量与具有对应于规定距离的周期的信号进行混合，仅使用所产生的一个边带产生分析信号。 傅立叶变换单元从通过分析信号的傅立叶变换获得的轮廓中找到与测量对象的距离。

公开(公告)号：US6101873A

公开(公告)日：2000-08-15

申请号：US649203

申请日：1996-05-17

Applicant: Hiroshi Kawakatsu ,  Kouichi Tanaka ,  Hiroshi Uematsu

Inventor： Hiroshi Kawakatsu ,  Kouichi Tanaka ,  Hiroshi Uematsu

IPC: G01F23/26

CPC classification number: G01F23/268 ,  G01F23/266

Abstract: Switching member SW20 which receives detection signals for detecting capacitance outputted from a control part 35, controls each of switches so as to measure capacitance between electrodes positioned adjacently (an electrode TE1 and an electrode TE2, and so on) before measuring capacitance of measuring object. Capacitance initially measured between the adjacent electrodes are stored in a storing circuit 30. The initial capacitance are averaged to calculate an averaged initial value. Upon calculating the averaged initial value, correction values which represent difference between the averaged initial value and the initial capacitance are calculated. Actual measured values are corrected using the correction values when level of measuring object is measured. It is therefore possible to measure level of measuring object without influence of floating items or the like with stability, because level measurement is conducted by utilizing capacitance measured between adjacent electrodes. Also, actual measured values are corrected with the corrected value after measuring initial values. Therefore, level measurement of the measuring object can be conducted with high stability and accuracy.

Abstract translation: 接收检测从控制部35输出的电容的检测信号的开关部件SW20，在测量对象物体的电容量之前，控制每个开关以测量邻近的电极之间的电容（电极TE1和电极TE2等）。 最初在相邻电极之间测量的电容被存储在存储电路30中。初始电容被平均以计算平均的初始值。 在计算平均初始值时，计算表示平均初始值和初始电容之间的差的校正值。 当测量对象的电平时，使用校正值校正实际测量值。 因此，可以通过利用在相邻电极之间测量的电容来进行电平测量，从而可以稳定地测量测量对象的水平而不影响浮动物品等。 此外，在测量初始值之后，用校正值校正实际测量值。 因此，能够以高稳定性和精度进行测量对象的液位测量。

公开(公告)号：US07479921B2

公开(公告)日：2009-01-20

申请号：US11486086

申请日：2006-07-14

Applicant: Tadamitsu Iritani ,  Kazuhiro Wakabayashi

Inventor： Tadamitsu Iritani ,  Kazuhiro Wakabayashi

IPC: G01S13/08 ,  G01S13/00

CPC classification number: G01S13/36 ,  G01S2007/356

Abstract: A transmission unit emits an electromagnetic wave having the same frequency f as an output signal from a sending unit in a direction of a measurement axis. A detecting unit performs synchronous detection on a reflected wave detected by a directional coupler by an in-phase signal and a quadrature signal of the transmission signal, and by extracting DC component from the detection signal, detects the in-phase component and quadrature component of the reflected wave. An analysis signal generating unit mixes the in-phase component and quadrature component of the reflected wave and signals having periodicity corresponding to a prescribed distance, and using only one of the resulting side bands, generates an analysis signal. Fourier transform unit finds distance to the object of measurement from a profile obtained by Fourier transform of the analysis signal.

Abstract translation: 传输单元沿着测量轴的方向发射具有与来自发送单元的输出信号相同的频率f的电磁波。 检测单元通过定向耦合器通过同相信号和发送信号的正交信号对反射波进行同步检测，并且通过从检测信号中提取DC分量来检测同步分量和正交分量 反射波。 分析信号生成单元将反射波的同相分量和正交分量与具有对应于规定距离的周期的信号进行混合，仅使用所产生的一个边带产生分析信号。 傅立叶变换单元从通过分析信号的傅立叶变换获得的轮廓中找到与测量对象的距离。

公开(公告)号：US06922065B2

公开(公告)日：2005-07-26

申请号：US10467633

申请日：2002-05-02

Applicant: Hiroshi Kawakatsu

Inventor： Hiroshi Kawakatsu

IPC: G01V3/10 ,  G01R27/02 ,  G01H1/00

CPC classification number: G01V3/101 ,  G01F23/0076 ,  G01F23/0092 ,  G01F23/2967 ,  G01H11/00 ,  G01N11/16

Abstract: A triangular wave generating circuit (21) generates a sweep voltage of a triangular wave, a VCO (22) generates a sweep of a frequency according to the sweep voltage, and a driving coil (4) is driven by the sweep voltage. From the current flowing through the driving coil (4), an interference component is extracted and rectified by a rectifier circuit (27). A peak hold circuit (28) holds a peak value of an interference voltage within a period corresponding to one sweep. The peak value thus held is compared by a comparator circuit (29) with a predetermined value and accordingly, a relay circuit (30) outputs a signal indicative of whether an object is present or not.

Abstract translation: 三角波发生电路（21）产生三角波的扫描电压，VCO（22）根据扫描电压产生频率扫描，驱动线圈（4）由扫描电压驱动。 从流过驱动线圈（4）的电流，通过整流电路（27）提取并整流干扰成分。 峰值保持电路（28）将干扰电压的峰值保持在对应于一个扫描的周期内。 这样保持的峰值由具有预定值的比较器电路（29）进行比较，因此继电器电路（30）输出指示对象是否存在的信号。

公开(公告)号：US6105425A

公开(公告)日：2000-08-22

申请号：US250171

申请日：1999-02-16

Applicant: Hiroshi Kawakatsu

Inventor： Hiroshi Kawakatsu

IPC: G01F23/22 ,  G01F23/296 ,  G01F23/28

CPC classification number: G01F23/2966 ,  G01F23/2967

Abstract: A base of a detection pipe is fixed. A vibration piece has its one end fixed to a closing portion and the other end provided with a permanent magnet. An electromagnet is closely attached inside the detection pipe such that it is arranged in a direction of axis of the permanent magnet, thereby forming a folded cantilever. Vibration is detected by a distortion detecting element, and the output therefrom is amplified by an amplification circuit for driving the electromagnet. Thus, the detection pipe, closing portion and vibration piece are repeatedly vibrated.

Abstract translation: 检测管的底座是固定的。 振动片的一端固定在封闭部分，另一端设有永久磁铁。 电磁铁紧密地安装在检测管内，使其沿永磁体的轴线方向排列，从而形成折叠的悬臂。 振动由失真检测元件检测，其输出由用于驱动电磁体的放大电路放大。 因此，检测管，关闭部和振动片重复地振动。

公开(公告)号：US5247832A

公开(公告)日：1993-09-28

申请号：US836648

申请日：1992-02-14

Applicant: Takayuki Umezawa ,  Takao Kawakita

Inventor： Takayuki Umezawa ,  Takao Kawakita

IPC: G01F23/22 ,  G01F23/296

CPC classification number: G01F23/22 ,  G01F23/2967

Abstract: In a vibrator-type level sensor, a detection pipe (14) is provided projecting from a base unit (1) to be mounted to a wall of a container (8) containing a substance (100) to be detected. The detection pipe (14) has an internal vibration plate (12) attached with a vibrating piezo-electric device (16) thereon and the internal vibration plate (12) is mechanically connected through an end cap (13) to the free end of the detection pipe (14, 140) to form a folded cantilever unit (30) which responds when the end cap (13) or pipe (14) are contacted by the material being sensed in the container.

公开(公告)号：US4740726A

公开(公告)日：1988-04-26

申请号：US888523

申请日：1986-07-21

Applicant: Takayuki Umezawa

Inventor： Takayuki Umezawa

IPC: G01F23/296 ,  H01L41/08

CPC classification number: G01F23/2967

Abstract: A vibrator-type level sensor having a detecting pipe (20) in which an inner vibration member (22) with piezo-electric devices (8a) (8b) (8c) is mounted, the detecting pipe (20) and the inner vibration member (22) constituting a folded cantilever.

Abstract translation: 一种具有检测管（20）的振动器型液位传感器，其中安装有压电装置（8a）（8b）（8c）的内振动件（22），所述检测管（20）和所述内振动件 （22）构成折叠悬臂。