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1. 发明专利

JPH11344358A MEASURING SYSTEM USING OPTICAL FIBER BRAGG DIFFRACTION GRATING 失效
公开(公告)号：JPH11344358A
公开(公告)日：1999-12-14
申请号：JP7152199
申请日：1999-03-17
申请人： FURUKAWA ELECTRIC CO LTD , TOKYOTO GESUIDO SERVICE KK , FUJI ELECTRIC CO LTD
发明人： YASUI HIDETOSHI , IZUMO MASAKI , SAKAMOTO TOSHIKI , SAITO HIROSHI , HARADA TOSHIRO , IKOMA MASAKAZU , NAKAHARA YASUO , TANABE KINYA
IPC分类号： G01L1/24 , G01B11/00 , G01D5/26 , G01D5/353 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To make so that the measurement at a plurality of measuring points can be continued even with abnormalities such as wire break, etc., on an optical fiber, when measuring at a plurality of measuring points with FBGs provided at a plurality of points on the length of the optical fiber. SOLUTION: One end of an optical fiber 1 having FBG 21 -2n at a plurality of points on its length is connected to a first output port 13A of a measuring path switch 11, the other end is connected to a second output port 13B of the measuring path switch 11, an FBG reflected light measuring unit 4 is connected to an input port 12 of the measuring path switch, and the measuring path switch 11 is in a state of connecting the input port 12 and first output port 13A when no failure exists on the optical fiber, but when a failure occurs, the switch 11 is switched to a state of connecting the input port 12 and second output port 13B.

2. 发明专利

JP2001108553A SENSOR FOR MEASURING PRESSURE 失效
公开(公告)号：JP2001108553A
公开(公告)日：2001-04-20
申请号：JP28701799
申请日：1999-10-07
申请人： FURUKAWA ELECTRIC CO LTD , FUJI ELECTRIC CO LTD , TOKYOTO GESUIDO SERVICE KK
发明人： MATSUDA YOSHIKAZU , SAKAMOTO TOSHIKI , IKOMA MASAKAZU , TANABE KINYA , SAITO HIROSHI , HARADA TOSHIRO
IPC分类号： G01L19/00 , G01L11/00 , G01L11/02
摘要： PROBLEM TO BE SOLVED: To make highly reliable pressure measurements by preventing the deformation of a pressure receiving element even if the mounted condition of a base varies depending on the tightened conditions of bolts or vibration, etc. SOLUTION: In a sensor for measuring pressures, an FBG15a is fixed to a diaphragm 10a serving as a pressure receiving element, and the distortion of the diaphragm 10 is detected by the FBG15a so that the sensor measures the pressure applied to the diaphragm 10a The diaphragm 10a, the base 10b, and a collar part 10c provided on the outer edge of the base are formed integrally with each other and the collar part 10c is fixed to a case 11 by means of the bolts 14.

3. 发明专利

JP2001108549A PRESSURE MEASURING APPARATUS 失效
公开(公告)号：JP2001108549A
公开(公告)日：2001-04-20
申请号：JP28967399
申请日：1999-10-12
申请人： FURUKAWA ELECTRIC CO LTD , FUJI ELECTRIC CO LTD , TOKYOTO GESUIDO SERVICE KK
发明人： MATSUDA YOSHIKAZU , SAKAMOTO TOSHIKI , IKOMA MASAKAZU , TANABE KINYA , SAITO HIROSHI , HARADA TOSHIRO
IPC分类号： G01C13/00 , G01L11/00 , G01L11/02 , G01L19/00
摘要： PROBLEM TO BE SOLVED: To accurately measure external pressures imposed on a pressure gauge, regardless of its installation site, by preventing the intrusion of moisture into a pressure measuring apparatus. SOLUTION: Atmospheric pressure is introduced into an optical pressure gauge 10 from an absorbing part 24 provided at an optical connecting box 21 in a sewer and from an atmospheric pressure introduction pipe 23, and moisture in the atmosphere is absorbed by the absorbing part 24 to prevent the intrusion of the moisture into the pressure measuring apparatus. With the internal pressure of the pressure measuring apparatus coinciding with the atmospheric pressure in the sewer, external pressure applied to the optical pressure gauge 10 is measured.

4. 发明专利

JP2001108548A PRESSURE MEASURING DEVICE 失效
公开(公告)号：JP2001108548A
公开(公告)日：2001-04-20
申请号：JP28967299
申请日：1999-10-12
申请人： FURUKAWA ELECTRIC CO LTD , FUJI ELECTRIC CO LTD , TOKYOTO GESUIDO SERVICE KK
发明人： MATSUDA YOSHIKAZU , SAKAMOTO TOSHIKI , IKOMA MASAKAZU , TANABE KINYA , SAITO HIROSHI , HARADA TOSHIRO
IPC分类号： G01C13/00 , G01L11/00 , G01L11/02
摘要： PROBLEM TO BE SOLVED: To accurately measure an external pressure applied to a pressure gauge regardless of a set position. SOLUTION: In this pressure measurement device, the occurrence of an error in a measuring pressure accompanying an atmospheric pressure fluctuation is prevented by leading atmospheric pressure into the pressure gauge 10 from an atmospheric pressure lead-in pipe 17 provided in the same space as a space inside a sewer set with the pressure gauge 10 to offset the atmospheric pressure fluctuation, while the inflow of water and moisture into the pressure gauge 10 is prevented by blocking up an atmospheric pressure application part 17a with a variable capacity part 18.

5. 发明专利

JPS62276991A TESTING SYSTEM FOR MEASUREMENT CONTROL SYSTEM 失效
公开(公告)号：JPS62276991A
公开(公告)日：1987-12-01
申请号：JP11934386
申请日：1986-05-26
申请人： FUJI ELECTRIC CO LTD
发明人： IKOMA MASAKAZU
IPC分类号： G05B23/02 , G01D21/00 , H04L13/00 , H04L29/14 , H04Q9/00
摘要： PURPOSE:To monitor the abnormality of a field side device during measurement control by connecting the detection terminal equipment and the operation terminal equipment of the field side to the control device of a control center side through a transmission line and providing a data processing part and a data transmission part in these equipments respectively. CONSTITUTION:While the physical quantity detected in a detection terminal equipment 2 is converted into a digital signal in an input signal conversion part 21 and the digital signal and RAS information which shows the result of a self-diagnosis are stored in an internal memory a CPU 22, the information is transmitted to a control device 1 through a transmission input-output part 23. In a detection terminal equipment 3 the output signal from the device 1 is received at a transmission input part 33 to be stored in the internal memory of a CPU 32 and outputted through an output signal conversion part 31. In the device 1 the data received through a transmission input-output part 11 is properly processed by a CPU 12 and stored in a memory 13. The data in the memory 13 is displayed on a data display unit 1a and the data from a data input unit 1b is written in the memory 13. Thus the abnormality of the field side device can be monitored during the measurement control.

6. 发明专利

JPH10128086A DETECTION OF ABNORMALITY IN MEMBRANE TREATING SYSTEM AND CONTROL METHOD THEREFOR 失效
公开(公告)号：JPH10128086A
公开(公告)日：1998-05-19
申请号：JP29359296
申请日：1996-11-06
申请人： FUJI ELECTRIC CO LTD
发明人： YAMAGUCHI HIROHIDE , OODO TOKIO , IKOMA MASAKAZU
IPC分类号： B01D65/10 , C02F1/44
摘要： PROBLEM TO BE SOLVED: To perform not only abnormality detection but also control according to the number of membrane modules having abnormality by irradiating membrane treated water with light beams and outputting alarm signals when the number of scattered light pulses by fine particles in the treated water and the turbidity calculated from the scattered light quantity exceed set values. SOLUTION: Membrane treated water is measured by a device having both the functions of outputting an alarm signal PS when the membrane treated water is irradiated with light beam and the number of scattered light pulses by fine particles in the treated water or the number of light cutoff pulses exceeds a set value PL and of outputting an alarm signal DS when turbidity calculated by the scattered light quantity by fine particles in the treated water or the permeated light quantity exceeds a set value DL. When slight cracking occurs in the membrane at time t01 , with the progress of the cracking, fine particle number concentration P1 and turbidity D1 of the membrane treated water are increase. At this time, the system is controlled by pump operation control or a standby system is operated to secure the normal quantity of the treated water.

7. 发明专利

JPH0558320B2 失效
公开(公告)号：JPH0558320B2
公开(公告)日：1993-08-26
申请号：JP11934386
申请日：1986-05-26
申请人： FUJI ELECTRIC CO LTD
发明人： IKOMA MASAKAZU
IPC分类号： G05B23/02 , G01D21/00 , H04L13/00 , H04L29/14 , H04Q9/00

8. 发明专利

JPS63293677A DESIGNING DEVICE FOR LOOP CONTROLLER 失效
公开(公告)号：JPS63293677A
公开(公告)日：1988-11-30
申请号：JP12796587
申请日：1987-05-27
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM CORP
发明人： IKOMA MASAKAZU , NAKANO MASATO , NAGAI TETSUYA , TAKEUCHI YOSHITOMO , YOSHINO MINORU , MARUYAMA RYOSUKE
IPC分类号： G05B11/01 , G05B19/02 , G06F17/50
摘要： PURPOSE:To obtain a control function conforming to the purpose of a control object by securing a hierarchical structure for design information to be inputted in response to the detailed levels of control contents and inputting successively those design information in the order of higher levels. CONSTITUTION:A system forming part 2 receives the design information needed for acquisition of a loop control function of an object process from a design information input part 1 to perform a loop designing job and also displaying (plotting) this designing result at a display part 3. In this case, the design information has a hierarchical structure corresponding to the detailed levels of the control contents and is inputted successively in the order of higher levels. Thus even a complicated and high-level function can be easily obtained. The loop designing job is carried out with input of the design information at each level owing to the hierarchical structure of the design information.

9. 发明专利

JP2001188021A OPTICAL WATER LEVEL DETECTOR 失效
公开(公告)号：JP2001188021A
公开(公告)日：2001-07-10
申请号：JP2000320659
申请日：2000-10-20
申请人： FUJI ELECTRIC CO LTD
发明人： SANO YASUKAZU , HIRAYAMA NORITOMO , IKOMA MASAKAZU , TAKAMIZAWA SHINJI , ICHIISHI AKIHIRO , YOKOYAMA YASUHIRO
IPC分类号： G01F23/56 , G01F23/14 , G01F23/32 , G01L11/00 , G01L11/02
摘要： PROBLEM TO BE SOLVED: To detect whether or not a water level exceeds a specific value with simple constitution by reducing mechanical movable parts. SOLUTION: This detector is equipped with a float 20 which floats on water whose level should be detected, an up/down moving unit 13 which is able to move up and down in a detection cell 10 by being driven by the float 20, an input optical fiber 11 which makes detection light enter the detection cell 10, and an output optical fiber 12 that the light projected from the input optical fiber 11 through the up/down moving unit 13 enter in the detection cell 10. The up/down moving unit 13 is equipped with a 1st intermediate optical fiber 15 which is aligned with the input optical fiber 11 and output optical fiber 15 when the water level is below the set value and the up/down moving unit 13 is at its lower dead point and a 2nd intermediate optical fiber 16 which is aligned with the input optical fiber 11 and output optical fiber 12 when the water level is above the set value and the up/down moving unit 13 is at its upper dead point and also has FBG 19.

10. 发明专利

JPH09273987A METHOD AND APPARATUS FOR MEASURING PARTICLE SIZE, COUNT CONCENTRATION OR TURBIDITY OF FINE PARTICLE IN LIQUID 失效
公开(公告)号：JPH09273987A
公开(公告)日：1997-10-21
申请号：JP8039296
申请日：1996-04-03
申请人： FUJI ELECTRIC CO LTD
发明人： YAMAGUCHI HIROHIDE , OODO TOKIO , INOUE KOHEI , HIRAOKA MUTSUHISA , IKOMA MASAKAZU
IPC分类号： G01N15/14 , G01N21/47
摘要： PROBLEM TO BE SOLVED: To measure a particle size and a count concentration of fine particles in a liquid, by converting an intensity of scattering light beams from the fine particles to electric signals and counting in different measurement modes based on a count of pulses. SOLUTION: Light beams 1A of a light source 1 are scattered by fine particles 3 in a liquid to be measured which passes through a beam radiation area 2A of a flow cell 2. A part of the light beams is condensed by a condenser lens 4 and converted to electric signals by a scattering light photodetector 5 set on a condensing axis 5A of the scattering light. When a count concentration of the fine particles 3 is low, it is in a range of a particle count mode and therefore the electric signals of the scattering light are detected as pulses having a peak value corresponding to a particle size of the fine particles 3 and binarized, whereby the count concentration is measured. When the count concentration is high, pulses of the electric signals overlap, resulting in an error of missing of counting. In this case, an average scattering light mode is applied, so that the particle size and count concentration of the fine particles 3 are calculated from an average value and a standard deviation of the electric signals.

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