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1. 发明专利

JP2002098298A LIQUEFIED GAS TANK 失效
公开(公告)号：JP2002098298A
公开(公告)日：2002-04-05
申请号：JP2000291547
申请日：2000-09-26
申请人： MITSUBISHI HEAVY IND LTD , OSAKA GAS CO LTD , NIPPON YUSEN KK
发明人： SAKAMOTO DAISUKE , TANIGAWA MANABU , UEDA SHIN , IRIE TOSHIKAZU , OHASHI YOJI , TANAKA YASUO , MIHASHI KOJI
IPC分类号： G01K1/14 , B63B25/16 , F17C13/02
摘要： PROBLEM TO BE SOLVED: To dispense with the work on a large scale even when a problem is found on a temperature detecting means mounted in a tank, and to improve the maintenance workability. SOLUTION: Plural pipes are penetrated through a tank 3 storing the LNG liquid, from the external in a state that their lower end positions are different from each other, electric wires 10 respectively having temperature sensors 11 are mounted inside of the pipes, the pipes are communicated to each other to seal a H2 gas inside of plural pipes, plural temperature sensors 11 different from each other in the positions of liquid surfaces are mounted independently from the tank 3 to prevent the intrusion of the fuel in the tank 3 into the pipes, the tank can cope with a problem of the temperature detecting means without the work on a large scale, and the maintenance workability can be improved.

2. 发明专利

JP2002365104A ULTRASONIC TYPE VORTEX FLOWMETER 失效
公开(公告)号：JP2002365104A
公开(公告)日：2002-12-18
申请号：JP2001177541
申请日：2001-06-12
申请人： OSAKA GAS CO LTD , TOKICO LTD
发明人： OKAMOTO KUNIYOSHI , OHASHI YOJI , TASHIRO KOICHI , YOSHIKURA HIROSHI
IPC分类号： G01F1/32
摘要： PROBLEM TO BE SOLVED: To prevent delay of detection of change in pressure accompanied with occurrence of Karman vortexes by difference in length of a guiding paths. SOLUTION: In this ultrasonic type vortex flowmeter 70, a pair of passages 18A, 20A for propagation of ultrasonic waves, which penetrate in the extending direction of a body 16A for generating the vortexes, are arranged in side by side in the flowing direction (upstream and downstream sides) of fluid to be measured. In one ends of the passages 18A, 20A for the propagation of the ultrasonic waves, ultrasonic sensors for transmitting are opposed. In the other ends of the passages 18A, 20A for the propagation of the ultrasonic waves, ultrasonic sensors for receiving are opposed. Since total length of inlet and outlet holes 22A, 24A, 26A, 28A for the fluid are the same, timing of inflow when the fluid to be measured flows in from the inlet and outlet holes 22A, 26A for the fluid to the passages 18A, 20A for the propagation of the ultrasonic waves are the same as the timing of the inflow when the fluid to be measured flows in from the inlet and outlet holes 24A, 28A for the fluid to the passages 18A, 20A for the propagation of the ultrasonic waves. It is, therefore, possible to prevent increase in instrumental errors by the delay of the detection of the Karman vortexes 17.

3. 发明专利

JP2000039426A GAS PHYSICAL PROPERTY MEASUREMENT METHOD AND DEVICE 失效
公开(公告)号：JP2000039426A
公开(公告)日：2000-02-08
申请号：JP20753398
申请日：1998-07-23
申请人： OSAKA GAS CO LTD
发明人： FUJIMARU NAOYA , OHASHI YOJI
IPC分类号： G01N29/02 , G01N29/00 , G01N29/18
摘要： PROBLEM TO BE SOLVED: To measure physical properties related to the combustion of a combustible gas in real time by providing a sound velocity-deriving means or the like for obtaining the sound velocity of a gas to be measured from time when ultrasonic waves are propagated in the flow of the gas to be measured. SOLUTION: A gas to be measured flows in a specific direction in a measurement part 7. An ultrasonic wave is transmitted from one of ultrasonic transmitters/receivers to the other, and the sound velocity of the gas to be measured is obtained by a sound velocity-deriving means 18. The specific gravity of the gas to be measured is obtained from the sound velocity by a specific gravity-deriving means 20b. Regarding the specific gravity, since numeric values are related to the sound velocity of gas, the values are obtained from the sound velocity of the gas, thus obtaining the specific gravity of the gas, thus measuring the specific gravity of a product gas in real time. Also, a calorific value-deriving means 20a obtains the calorific value of the gas to be measured from the sound velocity, and an Wobbe index-deriving means 20c obtains a Wobbe index from the calorific value and the specific gravity.

4. 发明专利

JP2002031552A ULTRASONIC VORTEX FLOWMETER 失效
公开(公告)号：JP2002031552A
公开(公告)日：2002-01-31
申请号：JP2000216428
申请日：2000-07-17
申请人： OSAKA GAS CO LTD , TOKICO LTD
发明人： OKAMOTO KUNIYOSHI , OHASHI YOJI , YOSHIKURA HIROSHI , TASHIRO KOICHI , TANABE MINORU , INADA YUTAKA
IPC分类号： G01F1/32
摘要： PROBLEM TO BE SOLVED: To surely fix a sound absorbing member absorbing reflected wave in an ultrasonic wave propagation path. SOLUTION: An ultrasonic vortex flowmeter 10 is provided with a flowmeter main body 14 having a flow passage 12 allowing flow of fluid to be measured and a vortex generator 16 arranged inside the flow passage 12 in the flowmeter main body 14. In the upper and lower ends of the vortex generator 16, holding members 38 and 40 holding transmitting ultrasonic sensors 30 and 32 and receiving ultrasonic sensors 30 and 36 are arranged. A cylindrically formed sound absorbing member 43 and a ring-shaped clamping member 44 clamping both ends of the sound absorbing member 43 are installed in both ends of passages 18 and 20. The sound absorbing member 43 is housed in a recess part 45 and inserted into the passages 18 and 20 so as not to protrude, and both of upper and lower ends of the sound absorbing member 43 are clamped by means of the clamping member 44, so that the sound absorbing member is prevented from coming off while a temperature limitation of high-temperature liquid can be removed.

5. 发明专利

JP2000338093A METHOD AND APPARATUS FOR MEASURING NITROGEN GAS CONTENT IN METHANE GAS 失效
公开(公告)号：JP2000338093A
公开(公告)日：2000-12-08
申请号：JP14530399
申请日：1999-05-25
申请人： OSAKA GAS CO LTD
发明人： OHASHI YOJI , FUJIMARU NAOYA
IPC分类号： F17C13/00 , G01N29/00 , G01N29/02 , G01N29/18
摘要： PROBLEM TO BE SOLVED: To suppress a nitrogen gas content in the case of liquefying and storing nitrogen gas to a preset range by measuring the content of the gas mixed within a methane gas real time. SOLUTION: A BOG 6 generated from an LNG storage tank 4 of an LNG storage device 3 is reliquefied, and mixed gas having large nitrogen gas content is separated by a nitrogen separator 9. The separated gas is measured at its ultrasonic velocity in real time by utilizing an ultrasonic velocity measuring means 19 for measuring the speed by utilizing an ultrasonic speedometer 15. The relationship index between the nitrogen gas content in the mixed gas and the speed is previously obtained as the index for a standard gas having nitrogen gas contents of different concentrations, and stored in a relationship index storage means 17. A nitrogen concentration finding means 20 finds a nitrogen concentration, a regulation control command generating means 21 generates a control signal for regulating a valve travel of a flow control valve 14. A portion having high nitrogen concentration of the gas 11 is exhausted out of a system from the valve 14, and treated.

6. 发明专利

JPH11168941A DETECTOR FOR AMOUNT OF COLLECTED GRASS 失效
公开(公告)号：JPH11168941A
公开(公告)日：1999-06-29
申请号：JP36353397
申请日：1997-12-16
申请人： OSAKA GAS CO LTD , ISHIKAWAJIMA INSPECTION & INST , TOKYU KENSETSU KK
发明人： FUKUI EIICHIRO , IRIE TOSHIKAZU , OHASHI YOJI , HOZUMI SEISUKE , ANZAI MOTOI , SUZUKI TOSHIAKI , TAKASU MOTOYUKI , SUZUKI TOMOHISA
IPC分类号： A01D75/18 , A01D34/63 , A01D34/70
摘要： PROBLEM TO BE SOLVED: To provide the subject device equipped with a rotating sensor rotatably arranged in the course of an air stream and capable of detecting the amount of collected grass by the rotation of the rotating sensor and thereby accurately detecting the amount of the collected grass without any trouble. SOLUTION: This detector for the amount of collected grass is equipped with a rotating sensor 4 rotatably arranged in the course of an air stream and is capable of detecting the amount of the collected grass by the rotation of the rotating sensor 4 in the detector for the amount of the collected grass capable of conveying cut grass with the air stream and detecting the amount of the collected and cut grass. In the detector for the amount of the collected grass, the air stream can be led with a duct 3 and the rotating sensor 4 can be attached to the vicinity of an outlet part of the duct 3. Furthermore, the rotating sensor 4 has vanes of a windmill and is capable of detecting the rotation of the vanes in the detector for the amount of the collected grass.

7. 发明专利

JP2001215139A ULTRASONIC VORTEX FLOWMETER 失效
公开(公告)号：JP2001215139A
公开(公告)日：2001-08-10
申请号：JP2000023042
申请日：2000-01-31
申请人： OSAKA GAS CO LTD , TOKICO LTD
发明人： OKAMOTO KUNIYOSHI , OHASHI YOJI , YOSHIKURA HIROSHI
IPC分类号： G01F1/32
摘要： PROBLEM TO BE SOLVED: To ensure sealing of an ultrasonic sensor and prevent fluctuation of vibration characteristics. SOLUTION: An ultrasonic vortex flowmeter 10 has a flowmeter body 14 having a flow path where measuring fluid flows, and a vortex generator 16 provided inside the flow path in the flowmeter body 14. To the upper end and the lower end of the vortex generator 16, holding members 38 and 40 for holding ultrasonic sensors 30 and 32 for transmission and ultrasonic sensors 34 and 36 for reception are provided. Each ultrasonic sensor 30, 32, 34 and 36 is inserted in attachement holes 38a, 38b, 40a and 40b provided to the holding members 38 and 40 and held with a rubber packing 42 formed in annular shape and a press member 44 for pressing the rubber packing 42. Thus, they are sealed with the rubber packing 42, and vibration does not transmit to the holding member 38 and the vortex generator 16 so that S/N ratio of the reception signal in the ultrasonic sensors 34 and 36 for reception can be improved.

8. 发明专利

JP2000039425A GAS PHYSICAL PROPERTY-MEASURING DEVICE AND METHOD 失效
公开(公告)号：JP2000039425A
公开(公告)日：2000-02-08
申请号：JP20753298
申请日：1998-07-23
申请人： OSAKA GAS CO LTD
发明人： OHASHI YOJI , FUJIMARU NAOYA , SUMIDA KOICHI , OKAMOTO KUNIYOSHI
IPC分类号： G01N29/02 , G01N29/00 , G01N29/18
摘要： PROBLEM TO BE SOLVED: To obtain an easy-to-use gas physical property-measuring device where, for example, a timing for replacing operation cannot be limited. SOLUTION: A device is provided with a measurement pipe 70 where a gas to be measured is introduced and flows in the direction of a pipe axis inside, at the same time a detection part of a pair of ultrasonic transceiver 15a in parallel with the flow of the gas to be measured in the measurement pipe while they oppose each other, and a sound speed-deriving means 18 for capturing propagation time where ultrasonic waves are propagated in the flow of the gas to be measured from one ultrasonic transceiver 15a to the other 15a bi-directionally and for obtaining the sound speed of the gas to be measured according to the obtained pair of propagation time. Further, the device is provided with at least one of calory-deriving means 20a for obtaining the amount of generated heat of the gas to be measured according to a sound speed obtained from the sound speed-deriving means 18, a specific gravity-deriving means 20b for obtaining the specific gravity of the gas to be measured, or a Wobbe index-deriving means 20c for obtaining the Wobbe index of the gas to be measured.

9. 发明专利

JPH11175146A TRAVELING OBJECT CONTROLLER 失效
公开(公告)号：JPH11175146A
公开(公告)日：1999-07-02
申请号：JP36189597
申请日：1997-12-10
申请人： OSAKA GAS CO LTD , TOKYU KENSETSU KK
发明人： FUKUI EIICHIRO , IRIE TOSHIKAZU , OHASHI YOJI , TAKASU MOTOYUKI , SUZUKI TOMOHISA
IPC分类号： G05D1/02 , H04B5/00 , H02J17/00
摘要： PROBLEM TO BE SOLVED: To improve the degree of freedom of the arrangement of guide path wires by crossmgly arranging the guide path wires at a traveling object traveling along the guide path wires by allowing a current to flow the guide path wires and detecting an electromagnetic field induced on the outside of the guide path wires. SOLUTION: The controller for a traveling object 3 makes the object 3 travel along a guide path wire A by allowing a current to flow the guide path wires A and detecting the electromagnetic field 12 induced on the outside of the guide path wire A. In this case, the wire A is buried under the whole surface of a ground, e.g. to travel the object 3 with a mower along the wire A to automatically cut grasses on the whole surface of the ground. Guide path wires A and B are crossingly arranged at the controller like that. Namely, as the wire B is arranged to prevent a detector 2 from detecting the electromagnetic field 12 induced by the wire B, the object is surely controlled along the prescribed wire A in spite of crossing plural wires A and B. Thereby, the start position and the goal position of the wire A are made coincident with each other.

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