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1. 发明专利

JPS6080751A OPERATING CIRCUIT OF ORGANIC POLYMER TYPE HUMIDITY SENSOR 失效
公开(公告)号：JPS6080751A
公开(公告)日：1985-05-08
申请号：JP18918783
申请日：1983-10-12
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： SUGAWARA TOORU , KAWAKAMI HIROJI , TSUCHIYA SHIGEKI , KANESHIRO TOKUYUKI , OOHARA SHIYUUICHI , KASHIWAGI MITSUYOSHI
IPC分类号： G01N27/12
摘要： PURPOSE:To eliminate the possibility for deterioration of electrodes and to enable stable and sure detection operation by maintaining the voltage to be impressed between the terminals of a humidity sensor always at the prescribed value or below and setting the prescribsd value for the ionizing voltage of the electrodes. CONSTITUTION:The AC output voltage V of an AC voltage source 2 is straightly impressed to a sensor 1 and the current specified by the impedance of the sensor 1 and the voltage V is consequently flushed into an operational amplifier 31 and the logarithmically converted DC voltage thereof appears at an output terminal 5. If the impedance of the sensor 1 changes in accordance with the ambient humidity, logarithmic conversion is accomplished by the amplifier 31 and therefore the change in the humidity can by detected as the DC voltage changing in proportion to said change. On the other hand, the max. value of the AC voltage impressed between the terminals 15 and 16 of the sensor 1 in this stage is divided by the DC voltages VCC, VEE supplied to an operational amplifier 21 and the voltage dividing ratios of resistors 26, 27. The deterioration of the electrodes of the sensor 1 is thoroughly prevented by determining the voltage V at the prescribed value.

2. 发明专利

JP2003242014A DATABASE SYSTEM AND DUPLICATING METHOD 审中-公开
公开(公告)号：JP2003242014A
公开(公告)日：2003-08-29
申请号：JP2002040395
申请日：2002-02-18
申请人： HITACHI LTD
发明人： TSUCHIYA SHIGEKI
IPC分类号： G06F12/00 , G06F15/00
摘要： PROBLEM TO BE SOLVED: To enable the update for a plurality of databases of DB at a remote location to synchronize with global transaction. SOLUTION: A client terminal, not shown in the figure, in a DB system conducts business with a server machine 1, and, if any trouble occurs in the server machine 1, requests a server machine 14 to process the business. According to the business request from a client terminal, DB 5 managed by DBMS 15 and DB 6 managed by DBMS 16 in the global transaction 3 are updated. DBMS 15 and DBMS 16 updates the contents of their corresponding DB 8 and DB 10 for duplication, by their duplication function, to the contents of DB 5 and DB 6 respectively via a network 7. TM 2 then transfers the management information 13 of the transaction to acquire synchronization between DB 8 and DB 10, to TM 12 at a remote location. COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2000028635A ACCELERATION-DETECTING APPARATUS 失效
公开(公告)号：JP2000028635A
公开(公告)日：2000-01-28
申请号：JP19387799
申请日：1999-07-08
申请人： HITACHI LTD
发明人： SHIMADA SATOSHI , SUZUKI KIYOMITSU , TSUCHIYA SHIGEKI , UKAI SEIICHI , KANEYASU MASAMI , KUROIWA HIROSHI , YOKOTA YOSHIHIRO
IPC分类号： G01P21/00 , G01P15/125
摘要： PROBLEM TO BE SOLVED: To obtain a correct detection output by setting a means close to a detection means for stimulating and driving the detection means and carrying out online a self diagnosis or self calibration. SOLUTION: This detecting apparatus has a stimulating means 2, integrally set close to a detecting means, thereby applying a calibration signal through the means. A response delay from the detecting apparatus is brought about extremely few. Moreover, since a high-speed signal-processing circuit is used, the required time for a self calibration can be shortened in comparison with a change time of measured values. Even when self calibration is conducted during the measurement, an output of the detecting apparatus is not disturbed that is, the so-called 'online calibration' is enabled. More specifically, a multiplexer operates in accordance with a command from a microcomputer having a memory, takes an output signal of the detecting means 1 into an amplifier and an analog digital converter to covert the signal into a digital signal. Based on this value, a source voltage is supplied, the calibration signal is applied via the amplifier to the stimulating means 2, or the like. A highly accurate output that can correct errors is obtained accordingly.

4. 发明专利

JPH09133708A CAPACITANCE TYPE ACCELERATION SENSOR AND ITS CALIBRATION AND DIAGNOSING METHOD 失效
公开(公告)号：JPH09133708A
公开(公告)日：1997-05-20
申请号：JP27582496
申请日：1996-10-18
申请人： HITACHI LTD
发明人： SHIMADA SATOSHI , SUZUKI KIYOMITSU , TSUCHIYA SHIGEKI , UKAI SEIICHI , KANEYASU MASAMI , KUROIWA HIROSHI , YOKOTA YOSHIHIRO
IPC分类号： G01P21/00 , B81B3/00 , G01P15/125 , G01P15/13
摘要： PROBLEM TO BE SOLVED: To perform self diagnosis and self calibration in on-line mode by detecting acceleration based on capacitance between first and second electrodes. SOLUTION: A detector 5 is composed of a detecting means 1, an exciting means 2 provided integrally with and close to the detecting means 1 and a signal processing means 4. A multiplexer is actuated by an instruction from the microcomputer of the means 4, the output signal of the means 1 is converted into a digital signal and based on the value thereof, a power supply voltage is supplied or a correcting signal is added to the means 2. Thus, a detected output is obtained, which enables an error to be corrected. In an acceleration sensor, a load 53 and a cantilever 54 for supporting the load 53 are formed in a center silicon substrate 51 by anisotropic etching. Upper fixed electrodes 55a and 55b are formed in surfaces opposed to loads placed on upper and lower substrates 52a and 52b positioned on the upper and lower parts of this substrate 51, displacement is calculated from capacitance between the fixed electrode and the load (movable electrode) and acceleration is measured.

5. 发明专利

JPH05340960A 失效
公开(公告)号：JPH05340960A
公开(公告)日：1993-12-24
申请号：JP14928492
申请日：1992-06-09
申请人： HITACHI LTD
发明人： MATSUMOTO MASAHIRO , SUZUKI KIYOMITSU , MIKI MASAYUKI , TSUCHIYA SHIGEKI
IPC分类号： G01P15/125 , G01P15/13 , G01P15/18 , H01L29/84
摘要： PURPOSE:To obtain a highly accurate downsized multi-dimensional acceleration sensor. CONSTITUTION:Fixed electrodes 101-112 are disposed oppositely to respective faces of a regular hexahedral movable electrode 100. The fixed electrodes impart electrostatic servo power to the movable electrode 100 which is thereby levitated in the center of a space section surrounded by the fixed electrodes 101-112. When the movable electrode 100 makes a displacement in response to multi- dimensional acceleration, an electrostatic servo control system detects variation of capacitances of the movable electrode and respective fixed electrodes and provides each fixed electrode with an electrostatic servo control signal for returning the movable electrode to a reference position (i.e., the center of space section between fixed electrodes). Multi-dimensional acceleration is detected by processing the electrostatic servo signal or the signal representative of variation of capacitance between fixed electrodes or movable electrodes.

6. 发明专利

JPH04157369A CAPACITIVE ACCELERATION SENSOR 失效
公开(公告)号：JPH04157369A
公开(公告)日：1992-05-29
申请号：JP27904790
申请日：1990-10-19
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： MATSUMOTO MASAHIRO , SUZUKI KIYOMITSU , MIKI MASAYUKI , TSUCHIYA SHIGEKI , SUZUKI MASAYOSHI , KUBOTA MASANORI
IPC分类号： G01P15/125 , G01P15/13
摘要： PURPOSE:To reduce noise and detect acceleration highly accurately by comparing electrostatic capacity between a movable electrode and two respective fixed electrodes which are oppositely placed with each other and by integrating the outputs. CONSTITUTION:Electrostatic capacitance between a movable electrode 4 whose position varies in response to acceleration and respective fixed electrodes 2, 3 which are oppositely placed are compared 6 with each other, and time sequences of the comparison results are calculated. A voltage waveform sequence having duty according to the integrated value is generated by a rectangular wave generator 9 to be applied to the electrodes 2, 3, and static electric power corresponding to it functions. Such control is repeated with a constant time intervals so that inertial force and static electric power functioning to the electrode are balanced with each other. Therefore by obtaining the duty of the voltage waveform sequence, acceleration is detected. Noise generated by capacitance detection is distributed over frequency a half of repetitive frequency, when noise power is constant. Therefore raising the repetitive frequency allows the noise in a signal band to be reduced.

7. 发明专利

JPH0394168A SEMICONDUCTOR CAPACITY TYPE ACCELERATION SENSOR AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0394168A
公开(公告)日：1991-04-18
申请号：JP23037189
申请日：1989-09-07
申请人： HITACHI LTD
发明人： SUZUKI KIYOMITSU , TSUCHIYA SHIGEKI , MIKI MASAYUKI , MATSUMOTO MASAHIRO , YOKOTA YOSHIHIRO , SATO KAZUO , SATO MASAYUKI
IPC分类号： G01P15/13 , B60G17/00 , B60G17/015 , B60T8/00 , B60T8/171 , G01P15/12 , G01P15/125 , H01L29/84
摘要： PURPOSE:To provide the sensor having high safety and sensitivity by elastically supporting a movable electrode part by means of >=4 pieces of beams and specifying the length thereof to >=50% of one side of the movable electrode part. CONSTITUTION:The movable electrode part 2 of a quadrilateral shape which is a mass body is formed in the central part of a silicon substrate 2 by anisotropic etching and further 4 pieces of the beams 3 which elastically support the electrode part are formed along the respective sides 2a of the electrode part 2. In addition, the beam 3 length is specified to >=50% of the side length of the electrode part 2. The electrode part 2 is supported by the beams 3 and the displacement thereof is thereby stabilized. The stability, sensitivity and impact resistance are improved in this way.

8. 发明专利

JPH01260366A SPACE FILTER TYPE SPEED DETECTOR 失效
公开(公告)号：JPH01260366A
公开(公告)日：1989-10-17
申请号：JP8816388
申请日：1988-04-12
申请人： HITACHI LTD
发明人： TSUCHIYA SHIGEKI , MATSUMOTO MASAHIRO , SUZUKI KIYOMITSU
IPC分类号： G01P3/36
摘要： PURPOSE:To enable stable highly accurate detection of speed under varied conditions, by providing a space filter with a wavelength selecting means to remove effect of extraneous light on the speed detection. CONSTITUTION:An infrared monochromatic ray with a specified wavelength band is irradiated to a measuring field of view of an object 7 to be measured such as a road surface from a light emitting diode 2. A reflection optical image of the infrared monochromatic ray corresponding to the measuring field of view is focused onto a space filter detector 4 with an objective lens 1 through an interference filter 3, which has a pass area somewhat broader than a half width of a radiation spectrum centered on the center wavelength of the light emitting diode 2. An output of the space filter detector 4 is applied to a signal processing circuit 6 through a pre-amplifier 5.

9. 发明专利

JPS63277973A VELOCITY MEASURING INSTRUMENT FOR MOVING BODY USING SPATIAL FILTER 失效
公开(公告)号：JPS63277973A
公开(公告)日：1988-11-15
申请号：JP11232587
申请日：1987-05-11
申请人： HITACHI LTD
发明人： TSUCHIYA SHIGEKI , SUZUKI KIYOMITSU , MATSUMOTO MASAHIRO
IPC分类号： G01P3/36 , G02B27/46
摘要： PURPOSE:To enable an accurate measurement in spite of variation in the distance to a body to be measured by using a shield plate which has plural small holes or slit array or a Fresnel lens which has deep depth of focus as an image forming element for reflected light. CONSTITUTION:A surface image of a body 7 to be measured is projected on spatial filters 3 and 3' through a filter 6 and image forming elements 2 and 2' which have slits. The spatial filters 3 and 3' are varied in light transmissivity by constant pitch and light receiving elements 4 and 4' detect light passed through them. The outputs of the light receiving elements 4 and 4' are inputted to a processing circuit through amplifiers 5 and 5' to calculate the velocity to the body 7.

10. 发明专利

JPS60196659A Resistance measuring electrode for sensor 失效
标题翻译：电阻测量用于传感器的电极
公开(公告)号：JPS60196659A
公开(公告)日：1985-10-05
申请号：JP5218284
申请日：1984-03-21
申请人： Hitachi Ltd
发明人： TSUCHIYA SHIGEKI , KAWAKAMI HIROJI , SUGAWARA TOORU , KANESHIRO TOKUYUKI , OOHARA SHIYUUICHI
IPC分类号： G01K7/16 , G01K7/22 , G01N27/12
CPC分类号： G01N27/12
摘要： PURPOSE:To obtain an electrode excellent in mass productivity, by alternately laminating insulating layers and conductor layers and utilizing the cross-sectional area of the laminate to use the conductor layers as a resistance measuring electrode for a sensor. CONSTITUTION:A large number of conductor layers 5 and insulating layers 4 are alternately stacked. This process can be performed by utilizing a green sheet and thick film printing technique. Because the gaps between electrodes are determined by the thickness of each insulating layer 4, each gap can be reduced to about 10mum. Thereafter, right and left parts are cut and the cross-sectional area exposed by cutting is metallized to connect the conductor layers and a pair of comb shaped electrodes are formed while leads are attached to the metallized parts 6. Because of a structure only cutting the laminate of conductors and insulators as mentioned above, mass productivity is excellent.
摘要翻译：目的：为了获得优异的批量生产率的电极，通过交替层叠绝缘层和导体层并利用层压体的横截面积来使用导体层作为传感器的电阻测量电极。构成：大量导体层5和绝缘层4交替堆叠。该方法可以通过使用生片和厚膜印刷技术来进行。由于电极之间的间隙由每个绝缘层4的厚度确定，所以每个间隙可以减小到大约10微米。此后，切割右部分和左部分，并且通过切割暴露的横截面区域被金属化以连接导体层，并且形成一对梳状电极，同时引线附着到金属化部分6上。由于仅将切割如上所述的导体和绝缘体的层叠体，批量生产率极好。

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