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1. 发明专利

JP2002296085A ULTRASONIC FLOWMETER 失效
公开(公告)号：JP2002296085A
公开(公告)日：2002-10-09
申请号：JP2001103757
申请日：2001-04-02
申请人： TOKYO KEISO KK , TECHNO DATA KK
发明人： KOBAYASHI TAMOTSU , SHIGETA KUNIKAZU , FUJII TORU
IPC分类号： G01F1/66
摘要： PROBLEM TO BE SOLVED: To provide an ultrasonic flowmeter capable of controlling properly the gain of an amplifier regardless of the quantity of impurities such as air bubbles or the like included in a fluid, executing flow measurement with a high S/N ratio even to the change of the kind or the temperature of the fluid, and executing stably always accurate flow measurement. SOLUTION: This flowmeter is constituted so that waveform data including at least a peak value in a received signal are digitally converted by an analog- digital converter 9 and preserved in a memory 11, and that a processor 10 selects the peak value in the case where the impurities such as the air bubbles, the solid powder or the like are not included in the fluid, as a selected peak value from among the peak values preserved in the memory at each prescribed time interval, compares the selected peak value with a peak set value set beforehand in the processor, transmits a control signal to a gain control terminal of the amplifier 5 based on the comparison result, and controls so that the peak value in an output signal of the amplifier becomes roughly in the same degree as the peak set value.

2. 发明专利

JP2929159B2 失效
公开(公告)号：JP2929159B2
公开(公告)日：1999-08-03
申请号：JP6445394
申请日：1994-03-08
申请人： TOKYO KEISO KK , KYO INSUTSURUMENTO KK
发明人： SUGI TOKIO , KATO SHIGEMI , YASUHARA TAKESHI
IPC分类号： G01F23/14

3. 发明专利

JPH11111131A FLOW SWITCH 失效
公开(公告)号：JPH11111131A
公开(公告)日：1999-04-23
申请号：JP28783497
申请日：1997-10-03
申请人： TOKYO KEISO KK
发明人： SUGI TOKIO
IPC分类号： H01H35/40
摘要： PROBLEM TO BE SOLVED: To provide a flow switch which has a simple structure and high durability, can be applicable to a wide range, and manufactured at low cost. SOLUTION: The base end part of an elastic material 2 is fixed in the inner wall of a flow pipe 1 through which a fluid flows while the other free end part of the elastic material is installed on the downstream side of the fluid in the flow pipe 1, a flow rate sensing body 4 which deflects the cantilever type elastic material by lift which is generated by the fluid flowing in the flow pipe, a magnet 5 is installed in the flow sensing body or near the body, and magnetism sensors 6a, 6b which are operated due to the approaching movement of the magnet and consequently whose output signals are reversed are installed in the outside of the flow pipe.

4. 发明专利

JPH11108710A AREA FLOWMETER 失效
公开(公告)号：JPH11108710A
公开(公告)日：1999-04-23
申请号：JP28783597
申请日：1997-10-03
申请人： TOKYO KEISO KK
发明人： WATANABE YASUSHI
IPC分类号： G01F1/22 , G01F1/24
摘要： PROBLEM TO BE SOLVED: To provide an area flowmeter capable of measuring a flow rate accurately and accurately detecting that the flow rate has reached a fixed value without malfunction. SOLUTION: A flout 3 having a magnet 2 is provided in a passage tube 1 for a fluid to be measured, magnetic-type proximity sensors 4a, 4b are provided outside the passage tube, the magnetic-type proximity sensors are provided with reed switches 5a, 5b opened normally but closed on detecting magnetic force exceeding a fixed value and bias magnets 6a, 6b for putting through the reed switches magnetic force of intensity between a working point to close the reed switches and an opening point to open the reed switches, and the magnetic-type proximity sensors 4a, 4b are installed outside the passage tube such that the reed switches 5a, 5b are situated nearer to the passage tube 1 and the bias magnets 6a, 6b are farther from the passage tube 1.

5. 发明专利

JPH10122923A ULTRASONIC FLOW METER 失效
公开(公告)号：JPH10122923A
公开(公告)日：1998-05-15
申请号：JP29333896
申请日：1996-10-15
申请人： TOKYO KEISO KK , IZUMI GIKEN KK
发明人： KOYANO KIYOSHI , USUI RYOKO , IGAWA TADASHI , SUGI TOKIO
IPC分类号： G01F1/66
摘要： PROBLEM TO BE SOLVED: To provide an ultrasonic flow meter which is provided with a detector made of a pipe body having the same diameter over the whole length, and which is small in diameter for the small flow rate, and compact. SOLUTION: A measuring pipe 1 is of the same diameter over the whole length, and two circular-ring-like ultrasonic vibrators 2A, 2B are provided in the axial direction of the measuring pipe at a specified distance from each other so that their inner peripheral surfaces are substantially brought into close contact with the outer peripheral surface of the measuring pipe. Since alternating electric energy is given to one vibrator of the two vibrators, transmitted ultrasonic waves are received by the other vibrator. By alternately switching the vibrators 2A, 2B on the transmission side and the reception side, the propagation time of ultrasonic wave from the upstream side to the downstream side, and the propagation time of ultrasonic wave from the downstream side to the upstream side, are respectively measured, and the difference between the propagation times is calculated by a calculation circuit 6 to determine the flow velocity of a fluid flowing in the measuring pipe. The measuring pipe 1 can be a linear pipe or a bent non-linear pipe.

6. 发明专利

JPH0743184A MASS FLOWMETER 失效
公开(公告)号：JPH0743184A
公开(公告)日：1995-02-10
申请号：JP20356393
申请日：1993-07-26
申请人： TOKYO KEISO KK
发明人： OCHIAI HIROSHI
IPC分类号： G01F1/68 , G01F1/698 , G01F15/04
摘要： PURPOSE:To provide a mass flowmeter which is never influenced by the temperature change of a fluid to be measured, has a high response speed to the flow rate change of the fluid, and can measure a minute flow rate. CONSTITUTION:Two temperature detecting elements 3, 4 for detecting the temperature of a fluid to be measured are provided on the outside of a conduit 1 for passing the fluid. Two self-superheating type resistors 5, 6 in which the resistance values are changed according temperature are arranged on the outside of the conduit on the lower stream side from the elements, and the resistors are paired with the temperature detecting elements one by one. The pairs are connected to two constant temperature difference control circuits 7, 8 for controlling the voltages applied to the resistors so that the temperature differences between the temperature detecting elements and the resistors are constant, respectively. Each constant temperature difference control circuit is connected to a subtracting circuit 11 for determining the difference in the voltage applied to the respective resistor by each constant temperature difference control circuit.

7. 发明专利

JPH0629754B2 失效
公开(公告)号：JPH0629754B2
公开(公告)日：1994-04-20
申请号：JP33086489
申请日：1989-12-20
申请人： TOKYO KEISO KK
发明人： SUNAKAWA YOSHIHIKO
IPC分类号： G01F23/62 , G01F23/56

8. 发明专利

JPH0342527A LIQUID LEVEL MEASURING INSTRUMENT 失效
公开(公告)号：JPH0342527A
公开(公告)日：1991-02-22
申请号：JP17837389
申请日：1989-07-10
申请人： TOKYO KEISO KK
发明人： OYAMA SHUICHI , TSUKAHARA KUNIKAZU , KOIKE TATSURO
IPC分类号： G01F23/62
摘要： PURPOSE:To improve the measurement precision by narrowing intervals of arrayed lead switches as a minimum read value without changing the measurement and detection capability of a measurement control part. CONSTITUTION:Positions of lead switches are detected in magnetic detecting units U1-U3...Ui, which are judged to have on-state lead switches, to convert a measured value to a digital quantity by an A/D converter 11 having the n bit resolution. When the number of lead switches arranged in each unit is set to in this case, all signal outputs in the on-state of respective lead switches can be substituted with an n-digit binary. Consequently, the liquid level measured value whose minimum read value is small is converted into the digital quantity without using a converter 11 of high resolution.

9. 发明专利

JPH0342525A MEASURING INSTRUMENT FOR LEVEL AND AVERAGE TEMPERATURE OF TANK 失效
公开(公告)号：JPH0342525A
公开(公告)日：1991-02-22
申请号：JP17837489
申请日：1989-07-10
申请人： TOKYO KEISO KK
发明人： SUGI TOKIO
IPC分类号： G01F23/00 , G01K1/02 , G01K3/02 , G08C15/00
摘要： PURPOSE:To shorten the time required for gathering of all data by receiving level data from a level measuring instrument by an average temperature measuring instrument to measure an average temperature corresponding to this level. CONSTITUTION:A level measuring instrument 2 has a function to communicate with a receiver 5 and an average temperature measuring instrument 3 by one unit 10b and the other unit 10a respectively. These devices are connected by an optical cable 4 and are operated. When receiving level data, the measuring instrument 3 selects an adapted thermometric element to measure the average temperature and transmits this data to the measuring instrument 2. The measuring instrument 2 stores received average temperature data in a memory together with level data. When a data request is issued from the receiver 5 to the measuring instrument 2, the measuring instrument 2 immediately returns level data and average temperature data stored in the memory to the receiver 5. Since the receiver 5 obtains level data and average temperature data immediately when issuing the data request, the data gathering time is shortened.

10. 发明专利

JPH0246885B2 失效
公开(公告)号：JPH0246885B2
公开(公告)日：1990-10-17
申请号：JP6985884
申请日：1984-04-07
申请人： TOKYO KEISO KK
发明人： SUNAKAWA YOSHIHIKO
IPC分类号： G01F23/26

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