JP4727522B2 - Fuel supply management system - Google Patents

Description

  The present invention relates to a fuel supply management system, and more particularly to a fuel supply management system configured to monitor the presence or absence of an abnormality in a reciprocating flow meter disposed in a fuel supply path for supplying fuel.

  2. Description of the Related Art In recent years, a fuel supply management system in which a maintenance company inspects and repairs a fuel supply station that supplies fuel such as gasoline or light oil to a fuel tank of a vehicle has been introduced (for example, see Patent Document 1).

  In this type of fuel supply machine management system, each device (for example, flow meter, pump, solenoid valve, etc.) mounted on a meter (fuel supply machine) is regularly checked. Are managed by a POS or a management terminal device. And when the inspection item of each apparatus becomes the predetermined number of elapsed days or months, the maintenance staff dispatched from the maintenance company inspects each apparatus.

  Also, depending on the equipment of the weighing machine, even if an abnormality occurs, the staff at the service station may not immediately notice the occurrence, and the maintenance staff will not be aware of the abnormality even when checking the specified inspection items. There is a case. For example, as a flow meter mounted on a weighing machine, a reciprocating flow meter configured such that four pistons are arranged in a cross shape and each piston is interlocked via a cam provided in the center portion thereof. (Also referred to as a reciprocating piston type positive displacement flow meter) is used (see, for example, Patent Document 2).

In this type of reciprocating flowmeter, the instrumental error that has been adjusted and verified at the shipping stage is incorporated in the weighing machine, but the instrumental error decreases as the wear of the parts gradually increases. Since the error of the flow rate value displayed on the display is small, the staff at the liquid supply station and the maintenance personnel often do not notice the abnormality of the flow meter. Here, the instrumental difference E of the flow meter is a value obtained by subtracting the actual amount Q passed through the flow meter from the indicated amount I of the flow meter (E = I−Q), or a percentage of the actual amount of the value {E = ( (I−Q) / Q) × 100 (%)}.
JP 2003-31798 A Japanese Patent Laid-Open No. 7-55526

  Therefore, in the fuel supply management system that manages the meter (fuel supply machine) using the reciprocating flow meter configured as described above, maintenance of the reciprocating flow meter is regularly performed. However, if the measurement accuracy gradually decreases as the mechanical parts such as pistons and cams wear, there is a problem that this decrease in the measurement accuracy of the reciprocating flow meter is not noticed until the next periodic inspection or maintenance. there were.

  In view of the above circumstances, an object of the present invention is to provide a fuel supply management system that solves the above-described problems.

  In order to solve the above problems, the present invention has the following means.

The present invention includes a fuel supply machine having a fuel supply path for supplying fuel,
A reciprocating flow meter having a plurality of pistons for measuring the flow rate of fuel supplied by the fuel supply path ;
An instrumental difference adjusting mechanism that is provided on any one of the plurality of pistons and adjusts an amount of flow measurement of the reciprocating flow meter by adjusting a feed amount by the piston;
A fuel supply management system having a management device for managing the state of the reciprocating flow meter,
Storage means for storing flow rate change data associated with the measurement operation of the reciprocating flow meter;
Of the flow rate change data stored in the storage means , the difference between the lower limit value of the pulsation amplitude based on the change in flow rate due to the feed amount of the piston having the instrument difference adjusting mechanism and the preset reference value is a predetermined determination. Pulsation monitoring means for monitoring whether or not the value is greater than or equal to,
A determination unit that determines that an abnormality has occurred when the difference between the lower limit value of the pulsation amplitude and a preset reference value is greater than or equal to a predetermined determination value by the pulsation monitoring unit;
By providing the above, the above-mentioned problem is solved.

Further, according to the present invention, the pulsation monitoring means has a pulsation amplitude based on a change in flow rate due to a feed amount of a piston having the instrumental difference adjustment mechanism among flow rate change data stored in the storage means as time elapses . By monitoring whether or not the difference between the lower limit value and a preset reference value is greater than or equal to a predetermined determination value , the above problem is solved.

Moreover, this invention solves the said subject by having an alerting | reporting means which alert | reports that there exists abnormality in the said reciprocating flow meter when it determines with abnormality generation | occurrence | production by the said determination means.

According to the present invention, the lower limit of the pulsation amplitude based on the change in the flow rate due to the piston feed amount having the internal difference adjustment mechanism of the flow rate change data stored in the storage means along with the measurement operation of the reciprocating flow meter. When the difference between the value and the preset reference value is greater than or equal to the predetermined criterion value, it is determined that an abnormality has occurred.Therefore, the instrumental error decreases due to mechanical wear of the reciprocating flow meter, resulting in a measurement error. It becomes possible to confirm that there is an abnormality in the reciprocating flow meter when the staff at the liquid supply station or maintenance personnel inspects it, and the supply error of the supplied fuel increases. The reciprocating flow meter can be repaired and the instrumental error can be adjusted before, and the measurement accuracy of the reciprocating flow meter can always be maintained in the verification state, thereby improving the reliability of the fuel supply accuracy.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a fuel supply machine management system according to the present invention. As shown in FIG. 1, the fuel supply machine management system 10 is installed in a measuring machine 12 installed in the liquid supply stations A to Z, a management terminal device 14 that manages the measuring machine 12, and a maintenance company 13. It comprises a maintenance terminal device 17.

  The management terminal device 14 is connected so as to be communicable with the measuring machine 12 of the liquid supply station. Further, the management terminal device 14 can communicate with the maintenance terminal device 17 and the portable terminal device 50 possessed by maintenance personnel via the public line and the Internet 15. For example, an abnormality occurs from the control circuit 16 of the weighing machine 12. When a signal or data is received, an abnormality e-mail is transmitted to the maintenance terminal device 17 and the portable terminal device 50, for example, notification means for notifying a flow meter difference abnormality is provided.

  Furthermore, the maintenance terminal device 17 stores past abnormality data in the database 17 </ b> A based on the abnormality notification transmitted from the management terminal device 14.

Since the abnormality notification is sent from the management terminal device 14 to the portable terminal 50 possessed by the maintenance staff in charge of the area, the maintenance staff immediately receives the malfunctioning e-mail. You can move to the supply station where the abnormality occurred.
The portable terminal 50 is a liquid crystal that displays a communication device that communicates via the Internet 15 and abnormal data (information such as the name of a liquid supply station, the number of a measuring device in which an abnormality has occurred, and the content of the abnormality) downloaded via the Internet 15. This is a portable mobile device having a monitor and a keyboard.

  The maintenance staff can check the contents of the abnormality with the portable terminal 50 when there is an abnormality notification, so that when it arrives at the liquid supply station, it becomes possible to immediately check and repair the abnormal part, Maintenance time can be shortened.

  The control circuit 16 of the weighing machine 12 is communicably connected to the management terminal device 14 installed in the office of the liquid supply station via a communication line (SS-LAN) 18.

  The management terminal device 14 includes liquid supply information output from the weighing machine 12 (for example, including information such as the amount of liquid supplied to the vehicle, the type of oil, the amount of liquid supplied, etc.) and maintenance information ( (Including abnormal information such as presence / absence of repair). And the management terminal device 14 will memorize | store the information separately transmitted from each measuring machine 12 in the memory | storage device 19, if the liquid supply to a vehicle is performed.

  Further, the control circuit 16 of the weighing machine 12 transmits liquid supply information and maintenance information to the management terminal device 14 every time liquid supply is completed. When there is abnormal data in the maintenance information transmitted from the control circuit 16 of the weighing machine 12, the management terminal device 14 sends the abnormal data to the maintenance terminal device 17 of the maintenance company 13 through the public line and the Internet 15. Send.

  When the maintenance terminal device 17 of the maintenance company 13 receives the abnormal data from the management terminal device 14 of each liquid supply station that has a maintenance contract, the database 17A receives the abnormal data as information on the measuring machine 12. To remember.

  Therefore, the employee of the maintenance company 13 confirms the contents of the abnormality data of the liquid supply station stored in the maintenance terminal device 17 to confirm on the spot where the liquid repair station needs to be inspected and repaired. be able to. Furthermore, the worker who performs maintenance can check the abnormality data of each measuring machine that performs inspection and repair on the day based on the latest information obtained from the maintenance terminal device 17 before the departure from the sunrise.

  The measuring machine 12 includes a liquid supply pump 22, a reciprocating flow meter 24, and a flow rate control valve 26 in a liquid supply line 20 that pumps oil liquid from an underground tank (not shown) buried underground in the liquid supply station. Is provided. A liquid supply nozzle 30 is provided at the tip of the liquid supply hose 28 communicated with the discharge port of the flow control valve 26. The flow control valve 26 is opened by a valve opening signal from the control circuit 16 and is closed when the valve opening signal is turned off.

  The liquid supply nozzle 30 is hooked on a nozzle hook 32 provided on the side surface of the housing of the liquid supply apparatus 12, and is removed from the nozzle hook 32 when the fuel is supplied to the vehicle. The nozzle hook 32 is provided with a nozzle switch 34 for detecting the presence or absence of the liquid supply nozzle 30. The nozzle switch 34 is turned on when the liquid supply nozzle 30 is hooked on the nozzle hook 32, and is turned off when the liquid supply nozzle 30 is removed from the nozzle hook 32.

  The casing of the liquid supply apparatus 12 includes a pump motor 36 that drives the liquid supply pump 22, a pulse transmitter 38 that outputs a flow rate pulse proportional to the flow rate measured by the reciprocating flow meter 24, and a vehicle. And an indicator 40 for displaying the integrated value supplied to the liquid.

  The control circuit 16 is electrically connected to each device of the flow control valve 26, the nozzle switch 34, the pump motor 36, the pulse transmitter 38, and the display 40.

  When an OFF signal is input from the nozzle switch 34, the control circuit 16 starts the pump motor 36 and opens the flow rate control valve 26 to enable liquid supply. Further, when the flow rate pulse is output from the pulse transmitter 38 by the valve opening operation of the liquid supply nozzle 30, the control circuit 16 displays the liquid supply amount calculated from the integrated value of the flow rate pulse on the display 40. Execute control processing.

  Then, when the nozzle switch 34 is turned on, the control circuit 16 stops the pump motor 36, stops the pump motor 36, closes the flow control valve 26, and calculates and displays a charge corresponding to the amount of liquid supplied. Let

  The control circuit 16 reads the control program stored in the memory 42 and performs liquid supply control, and the memory 42 stores a control program (stores flow rate change data accompanying the measurement operation of the reciprocating flow meter 24 ( The storage means 16A), the control program (pulsation monitoring means 16B) for monitoring whether or not the lower limit value of the pulsation has changed over time, and the lower limit value of the pulsation were detected from the flow rate change data. A control program (determination means 16C) that determines that an abnormality has occurred, and a control program (notification means) for notifying that there is an abnormality in the reciprocating flow meter 24 when the determination means determines that an abnormality has occurred. 16D) each control program for performing control processing is stored.

  Here, the configuration of the reciprocating flow meter 24 will be described. FIG. 2 is a cross-sectional view of the reciprocating flow meter 24. FIG. 3 is a longitudinal sectional view of the reciprocating flow meter 24.

  2 and 3, the reciprocating flow meter 24 is formed in the casing 60 so that four cylinders 62a to 62d protrude radially in the X and Y directions at intervals of 90 degrees. Pistons 64a to 64d are inserted into the cylinders 62a to 62d so as to be able to reciprocate. The piston rods 66a to 66d of the pistons 64a to 64d extend toward the center of the casing 60, and rollers 68a to 68d are supported at the ends thereof.

  Each of the rollers 68 a to 68 d is in sliding contact with a cam surface formed on the outer periphery of an eccentric cam 72 coupled to the rotation shaft 70. Further, in the cam chamber 74 provided with the eccentric cam 72, piston rods 66a, 66c of the piston rods 66a to 66d sliding in the same direction (X direction or Y direction) extend in the X direction. The piston rods 66b and 66d are connected by a connecting rod 78 extending in the Y direction.

  Therefore, the pistons 64a and 64c reciprocate in the X direction via the connecting rod 76, and the pistons 64b and 64d reciprocate in the Y direction via the connecting rod 78. A rotary valve 80 is fitted in an intermediate portion of the rotary shaft 70. The rotary valve 80 includes a supply hole 80a communicating with the inlet 60a of the casing 60 and a discharge hole 80b communicating with the outlet 60b. Are provided at intervals of 180 degrees. The rotary valve 80 is synchronized so that the cylinder 62a to 62d that performs the suction process communicates with the supply hole 80a, and the cylinder 62a to 62d that performs the discharge process and the discharge hole 80b communicate with each other. Rotate.

  Therefore, when any of the pistons 64a to 64d performs the suction process, the fuel (oil liquid) fed by the pump 22 flows into the cylinders of the suction processes of the cylinders 62a to 62d and the piston 64a. The fuel (oil fluid) in the cylinder that performs the discharging operation among ˜64d is discharged to the outlet 60b by the piston discharging step that moves in the cylinder. The reciprocating motions of the pistons 64a to 64d are transmitted to the eccentric cam 72 via the rollers 68a to 68d to rotate the rotary shaft 70. As a result, the rotary valve 80 fitted to the rotary shaft 70 rotates at a speed synchronized with the reciprocating motion of the pistons 64a to 64d to supply fuel into the cylinders of the cylinders 62a to 62d, and each cylinder 62a to 62d. The supply hole 80a and the discharge hole 80b are moved in the circumferential direction so as to discharge the fuel in the cylinder 62d.

  In addition, any one of the pistons 64a to 64d shown in FIG. 2 can be adjusted. A device difference adjusting mechanism (not shown) for adjusting the piston feed amount is for correcting the device difference of the flowmeter 24, and is provided so as to reciprocate with a different stroke from the other pistons. Yes.

  In the configuration in which such a device difference adjusting mechanism is provided in only one of the pistons 64a to 64d, the flow rate change pattern of the fuel discharged in the discharge process of each piston 64a to 64d is not uniform. A change in pulsation as shown in FIG. FIG. 4 is a graph showing changes in the flow rate of fuel measured at a predetermined sampling frequency. The graph shown in FIG. 4 shows an example of measurement data when a constant flow rate is measured.

  From this graph, the flow rate change at each sampling is detected in a pulse manner, and the flow rate change P1 indicated by the black arrow in FIG. 4 is due to the piston having the instrumental error adjusting mechanism, and is indicated by the white arrow in FIG. The flow rate changes P2 to P4 are due to the piston not having the instrumental error adjusting mechanism. From the waveform of this graph, one flow rate change P1 with relatively large fluctuations and three flow rate changes P2 to P4 with relatively small fluctuations are repeated, and pulsations linked to the reciprocation of the pistons 64a to 64d are observed. It can be seen that it occurs periodically.

  Such pulsation is caused by the structure of the reciprocating flow meter 24. When the pistons 64a to 64d reciprocate due to the movement of the fuel, the rollers 68a to 68d press the eccentric cam 72 and cause the rotating shaft 70 to move. There is a top dead center and a bottom dead center at which the piston speed becomes zero to rotate. Since the movement of the piston stops instantaneously at this top dead center, the rotational movement similarly stops. As a result, a decrease in flow rate occurs at the top dead center, and periodic pulsation as shown in FIG. 4 occurs even when a constant flow rate of fuel is supplied.

  Looking at the lower limit peak value of this pulsation, it can be seen that a flow rate lower than the others is generated at a frequency of once every four times. This is because, as described above, the instrument difference adjusting mechanism for adjusting the feed amount is provided to any one of the four pistons 64a to 64d, and other instrument difference adjusting mechanisms are provided. No piston and pulsation amplitude are different.

  It is determined whether or not the instrumental difference of the flow meter 24 has changed by monitoring the change in the lower limit peak value of the flow rate change P1 having the largest amplitude among the flow rate changes P1 to P4 associated with the reciprocation of the pistons 64a to 64d. It becomes possible to do. In the present embodiment, for example, in FIG. 4, when a reference value is set and the lower limit peak value of the flow rate change P1 falls below this reference value, the components of the reciprocating flow meter 24 are worn and measurement accuracy is increased. Is determined to have fallen below the standard.

  Note that abnormalities occurring in the reciprocating flow meter 24 include wear and deformation of camshafts, piston cups, rollers, and the like, and instrumental differences due to clearance changes caused by them.

  In this way, since not all the pulsations of the pistons 64a to 64d are monitored, but only the lower limit value of the flow rate change P1 having the largest amplitude is monitored, the burden of the monitoring process is reduced. When it is determined that the lower limit peak value of the flow rate change P1 has fallen below this reference value, the control circuit 16 of the weighing machine 12 indicates that an abnormality has occurred in the reciprocating flow meter 24. 14 and the maintenance terminal device 17.

  As a result, the maintenance company can recognize that an abnormality has occurred in the reciprocating flow meter 24 of the weighing machine 12, and also transmits the abnormality data to the portable terminal 50 to dispatch maintenance personnel to the liquid supply station. The inspection of the reciprocating flow meter 24 and the adjustment of the instrumental error can be immediately performed.

  Here, processing executed by the control circuit 16 of the weighing machine 12 will be described with reference to a flowchart shown in FIG. The control circuit 16 checks whether or not the nozzle switch 34 is off in S11. When the liquid supply nozzle 30 is removed from the nozzle hook 32 and the nozzle switch 34 is turned off (YES in S11), the process proceeds to S12 and the pump 22 is activated. In the next S13, it is checked whether or not the flow rate (instantaneous flow rate) measured by the reciprocating flow meter 24 has reached the maximum discharge flow rate (for example, 48 L / min) of the weighing machine 12.

  When the flow rate measured by the reciprocating flow meter 24 reaches the maximum discharge flow rate (in the case of YES in S13), the flow proceeds to S14, and the flow rate data measured by the reciprocating flow meter 24 is sampled at a predetermined frequency. A graph of sampling data as shown in FIG. 4 is created. In S15, the sampling data is stored in the memory 44 (storage means).

  In next S16, it is checked whether or not a predetermined time (usually, as an average time required for refueling, for example, about 10 seconds) has elapsed since the start of refueling. In S16, if the predetermined time has not elapsed (NO in S16), the process proceeds to S17 to check whether the flow rate (instantaneous flow rate) measured by the reciprocating flow meter 24 has become zero. . In S17, when the flow rate is not zero (NO in S17), the process returns to S14 and the processes of S14 to S17 are repeated.

  In S17, if the flow rate is zero (YES in S17), the process proceeds to S18 to check whether the nozzle switch 34 is on. In S18, when the nozzle switch 34 is OFF (NO in S18), the process returns to S13, and the processes after S13 are performed. In S18, when the nozzle switch 34 is on (YES in S18), the liquid supply nozzle 30 is returned to the nozzle hook 32, so the process proceeds to S20 and the pump 22 is stopped.

  If the predetermined time has elapsed in S16 (YES in S16), the process proceeds to S19 to check whether the nozzle switch 34 is on. In S19, when the nozzle switch 34 is OFF (NO in S19), the liquid supply nozzle 30 remains detached from the nozzle hook 32, so that the standby state is entered. In S19, when the nozzle switch 34 is ON (YES in S19), the liquid supply nozzle 30 has been returned to the nozzle hook 32, so the process proceeds to S20 and the pump 22 is stopped.

  In the next S21, a plurality of lower limit peak values (set A) of pulsation amplitudes are picked up from sampling data (see the graph of FIG. 4) of flow rate data measured by the reciprocating flow meter 24 (monitoring means). Then, it progresses to S22 and the flow volume in the top dead center of the piston which has an instrumental difference adjustment mechanism is extracted (set B). Then, the flow rate at the top dead center of another piston that does not have the instrumental error adjusting mechanism is extracted (set C).

  In next S23, each average value (Cave) of the lower limit peak value at the top dead center of the piston having the instrumental adjustment mechanism is calculated from the set B. In S24, in order to determine the validity of the average value, a difference between the average value and the reference value is set in advance with a flow rate verified at the time of shipment as a reference value (Cbase) (allowable range of instrumental error). ) Check whether or not it is above (determination means).

  In S24, when the difference between the average value and the reference value is less than the determination value (NO in S24), the process proceeds to S25 and is determined to be normal. In S24, when the difference between the average value and the reference value is equal to or larger than the determination value (YES in S24), the process proceeds to S26 to determine that an abnormality has occurred and notify the management terminal device 14 of the occurrence of the abnormality ( Notification means).

  After the process of S25 or S26, the process proceeds to S27, and the flow rate data and sampling data stored in the memory 44 are deleted.

  Next, control processing executed by the management terminal device 14 will be described with reference to the flowchart of FIG. In S31 shown in FIG. 6, the management terminal device 14 receives a signal indicating that an abnormality has occurred in the reciprocating flow meter 24 from the control circuit 16 of the weighing machine 12 (in the case of YES in S31), the process proceeds to S32. Then, the storage device 19 stores data indicating an abnormality in the reciprocating flow meter 24.

  In the next S33, the mobile terminal 50 owned by the maintenance staff is notified of the occurrence of an abnormality by e-mail. This e-mail is accompanied by information such as the liquid station where the abnormality has occurred, the weighing machine, and the content of the abnormality (abnormality error in the flowmeter).

  Subsequently, in S34, the maintenance terminal device 17 of the maintenance company 13 is notified of the occurrence of an abnormality by e-mail. The contents of the e-mail to the maintenance terminal device 17 are the same as the contents of the e-mail to the maintenance staff.

  As a result, the maintenance staff can check the details of the abnormality by an e-mail displayed on the liquid crystal panel of the portable terminal 50, and can quickly adjust the instrumental difference of the return flow meter 24.

  Next, a modified example will be described. FIG. 7 is a flowchart showing a modification of the control process executed by the control circuit 16 of the weighing machine 12. FIG. 8 is a flowchart showing a modification of the control process executed by the management terminal device 14.

  In FIG. 7, the processing of S41 to S53 is the same as the processing of S11 to S23 of FIG. In S54, the control circuit 16 of the weighing machine 12 transmits, to the management terminal device 14, data of each average value (Cave) of the lower limit peak value at the top dead center of the piston having the instrumental difference adjusting mechanism calculated in S53. To do.

  In S55, the flow rate data and sampling data stored in the memory 44 are deleted.

  Further, when the management terminal device 14 receives the abnormality notification in S61 shown in FIG. 8 (YES in S16), the management terminal device 14 proceeds to S62 and stores the received abnormality notification in the storage device 19.

  In the next S63, in order to determine the validity of the data of each average value (Cave), a determination value in which the difference between the average value and the reference value is set in advance with the flow rate verified at the time of shipment as the reference value (Cbase) ( It is checked whether it is equal to or greater than the allowable range of instrumental error (determination means).

  In S63, when the difference between the average value and the reference value is less than the determination value (NO in S63), the process proceeds to S64 and is determined to be normal. In S63, if the difference between the average value and the reference value is equal to or greater than the determination value (YES in S63), the process proceeds to S65, where it is determined that an abnormality has occurred and the portable terminal device 50 held by the maintenance personnel has an abnormality. The occurrence is notified by e-mail (notification means). This e-mail is accompanied by information such as the liquid station where the abnormality has occurred, the weighing machine, and the content of the abnormality (abnormality error in the flowmeter).

  Subsequently, in S66, the maintenance terminal device 17 of the maintenance company 13 is notified of the occurrence of abnormality by e-mail (notification means). The contents of the e-mail to the maintenance terminal device 17 are the same as the contents of the e-mail to the maintenance staff.

  As a result, the maintenance staff can check the details of the abnormality by an e-mail displayed on the liquid crystal panel of the portable terminal 50, and can quickly adjust the instrumental difference of the return flow meter 24.

  Thus, in this modification, the control circuit 16 of the weighing machine 12 monitors the change in the pulsation of the return flow meter 24, and the pulsation data (average values of the lower limit peak values at the top dead center of the piston). ) To the management terminal device 14, the management terminal device 14 can determine whether there is an abnormality based on the pulsation of the return flow meter 24.

  In the above-described embodiment, the case where fuel such as gasoline is supplied to the vehicle has been described as an example. However, the present invention is not limited to this, and the case where fuel other than gasoline (for example, gas such as LPG, LNG, and CNG) is supplied. Of course, the present invention can also be applied.

  Moreover, although the said Example demonstrated the case where notification of abnormality occurrence was notified by e-mail from the management terminal device 14 to the portable terminal device 50 possessed by the maintenance personnel, the present invention is not limited to this. The maintenance terminal device 17 that has received the e-mail can notify the mobile terminal 50 of the occurrence of an abnormality by e-mail.

  Further, in the above-described embodiment, the case where the management terminal device 14 notifies the mobile terminal device 50 possessed by the maintenance staff by e-mail when it is determined that an abnormality has occurred due to a change in the pulsation of the return flow meter 24 is described. However, the present invention is not limited to this, and for example, it is possible to call the maintenance staff via a method other than e-mail, for example, a mobile phone.

It is a block diagram which shows one Example of the fuel supply machine management system by this invention. 3 is a cross-sectional view of a reciprocating flow meter 24. FIG. 3 is a longitudinal sectional view of a reciprocating flow meter 24. FIG. It is a graph which shows the flow volume change of the fuel measured with the predetermined sampling frequency. It is a flowchart which shows the control processing which the control circuit 16 of the weighing machine 12 performs. It is a flowchart which shows the control processing which the management terminal device 14 performs. 10 is a flowchart showing a modification of control processing executed by the control circuit 16 of the weighing machine 12. It is a flowchart which shows the modification of the control processing which the management terminal device 14 performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fuel supply machine management system 12 Weighing machine 14 Management terminal device 16 Control circuit 17 Maintenance terminal device 19 Memory | storage device 22 Liquid supply pump 24 Reciprocating flow meter 30 Liquid supply nozzle 32 Nozzle hook 34 Nozzle switch 38 Pulse transmitter 50 Carrying Terminals 62a to 62d Cylinders 64a to 64d Pistons 68a to 68d Roller 70 Rotating shaft 72 Eccentric cams 76, 78 Connecting rod 80 Rotating valve

Claims (3)

A fuel supply machine having a fuel supply path for supplying fuel;
A reciprocating flow meter having a plurality of pistons for measuring the flow rate of fuel supplied by the fuel supply path ;
An instrumental difference adjustment mechanism that is provided on any one of the plurality of pistons and adjusts the amount of flow of the reciprocating flow meter by adjusting the delivery amount of the piston;
A fuel supply management system having a management device for managing the state of the reciprocating flow meter,
Storage means for storing flow rate change data associated with the measurement operation of the reciprocating flow meter;
Of the flow rate change data stored in the storage means , the difference between the lower limit value of the pulsation amplitude based on the change in flow rate due to the feed amount of the piston having the instrument difference adjusting mechanism and the preset reference value is a predetermined determination. Pulsation monitoring means for monitoring whether or not the value is greater than or equal to,
A determination unit that determines that an abnormality has occurred when the difference between the lower limit value of the pulsation amplitude and a preset reference value is greater than or equal to a predetermined determination value by the pulsation monitoring unit;
A fuel supply machine management system comprising: The pulsation monitoring means is preset with a lower limit value of the pulsation amplitude based on a change in flow rate due to a feed amount of a piston having the instrumental difference adjustment mechanism among flow rate change data stored in the storage means over time. 2. The fuel supply machine management system according to claim 1, wherein whether or not a difference from the reference value is equal to or greater than a predetermined determination value is monitored.   3. The fuel supply management system according to claim 1, further comprising a notification unit configured to notify that the reciprocating flow meter has an abnormality when the determination unit determines that an abnormality has occurred. 4. .

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