JP2022136253A - Fraud prevention system for filling facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fraud prevention system for a filling device which can effectively detect fraud related to a filling amount.

SOLUTION: A fraud prevention system (100-1) for a filling facility (40) of the present invention includes an information processor (42-1: for example, a tablet) which has a block (42B-1) having a function for comparing a change rate per unit time (a first change rate) of a flow rate indicated by a counter (28) of a filling device (2) and a change rate per unit time (a second change rate) of a measurement result of a flowmeter for calibration (7), and a block (42C-1) having a function for determining that there is no fraud when the comparison result indicates that they are the same, and determines that there is fraud when the comparison result by the comparison block (42B-1) indicates that they are different.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a filling facility (for example, a so-called "hydrogen station") in which a filling device for filling hydrogen, for example, in a fuel cell vehicle (FCV) or the like is installed. The present invention relates to technology for preventing tampering with instrumental errors of flowmeters to be measured and other fraudulent measurement of flowmeters.

In order to accurately measure the flow rate of the fluid (e.g., hydrogen) to be filled and to ensure that the flow meter in the filling device has not been tampered with, the prior art follows predetermined rules to control the flow of the filling device. calibrating.
For such calibration, for example, in the case of a hydrogen filling device, there is a case where calibration is performed while filling hydrogen into a vehicle (for example, a fuel cell vehicle) using a calibration device with a built-in small Coriolis flow meter (master meter). (See Patent Document 1, for example).

Calibration work in the prior art using such a calibration device will be described with reference to FIG.
In FIG. 14 , a hydrogen filling hose 4 is connected to the hydrogen filling device 2 , and the hydrogen filling hose 4 is configured to be connectable/removable to the calibrating device 3 . The calibration device 3 incorporates a reference flowmeter 7 (master meter), and the calibration device 3 can be connected/removed to a receptacle 10 of, for example, a fuel cell vehicle 1 (FCV) via a flowmeter discharge hose 8 and a filling nozzle 9. is.
When the on-vehicle tank of FCV 1 is filled by the hydrogen filling device 2 through the calibration device 3, the reference flow meter 7 of the calibration device 3 accurately measures the filled hydrogen filling amount, so the outlet flow meter in the hydrogen filling device 2 22 accuracy can be evaluated.
The outlet flow meter 22 in the hydrogen filling device 2 is provided with a pulse signal transmitter 24 that transmits the measurement result of the flow meter 22. Based on the pulse signal from the transmitter 24, the measurement result of the flow meter 22 is transmitted to the counter 28. sent to and displayed.
The hydrogen filling device 2 has a control unit 30 and executes hydrogen filling control according to a hydrogen filling protocol. The control unit 30 also includes an instrumental error adjustment unit 32 that records and stores an instrumental error of the flowmeter 22 .
In FIG. 14, a hydrogen filling facility 40 including the hydrogen filling device 2 is an external device of the hydrogen filling device 2, and is capable of exchanging information (for example, stored instrumental error) with the hydrogen filling device 2. It includes an apparatus, for example an office 34 .
When the calibrating device 3 detects the instrumental error of the flow meter 22 in the hydrogen filling device 2, the detected instrumental error is recorded by the instrumental error adjustment unit 32 of the control device 30, for example.

Here, if the flowmeter 22 can be disassembled or the device error can be adjusted without permission, the accuracy of the flowmeter 22 and the filling accuracy of the hydrogen filling device 2 cannot be maintained.
Furthermore, it becomes possible to change or tamper with the instrumental error, and various frauds in the filling amount by the hydrogen filling device 2 become possible.
However, as for the technology to prevent tampering with the flow meter 22 in the hydrogen filling device 2, there is an electronic sealing technology such as a password. However, no technology has yet been proposed for effectively detecting fraudulent filling amounts of the hydrogen filling device 2 .

Patent No. 6611026

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art, and provides a fraud prevention system for a filling device that can detect falsification of instrumental error or effectively detect fraud related to the filling amount. It is an object.

The anti-fraud system (100) of the filling facility (40) associated with the present invention comprises:
A block (42A: reception block) having a function of receiving the flow rate (mass flow rate) displayed by the counter (28) of the filling device (2) and the measurement result of the calibration flowmeter (7: mass flowmeter); ,
A block (42B: comparison block) having a function of comparing the flow rate displayed by the counter (28) of the filling device (2) and the measurement result of the calibration flow meter (7);
If the comparison result by the comparison block (42B) is the same (if the difference is within ±0.5%), it is determined that there is no fraud, or if the comparison result by the comparison block (42B) is not the same (± a decision block (42C) having the function of determining that fraud exists if there is a difference greater than 0.5%;
is characterized by including an information processing device (42: for example, a tablet) having
Here, the fluid includes both liquids such as oil and gases such as hydrogen. That is, the filling device (2) of the present invention means both a hydrogen filling device and a fueling device.

The fraud prevention system (100-1) of the filling facility (40) of the present invention comprises:
A block (42A-1: reception block) having a function of receiving the flow rate (mass flow rate) displayed by the counter (28) of the filling device (2) and the measurement result of the flow meter for calibration (7: mass flow meter) When,
A first change rate calculation block (42E-1: counter display flow rate change calculation block) and
A second change rate calculation block (42F-1: the flow meter measurement result change rate calculation block),
The rate of change per unit time (first rate of change) of the flow rate (mass flow rate) displayed by the counter (28) of the filling device (2) calculated in the first rate of change calculation block (42E-1); , a comparison block having a function of comparing the rate of change per unit time (second rate of change) of the measurement result of the calibration flowmeter (7) calculated by the second rate of change calculation block (42F-1) (42B-1) and
If the comparison result by the comparison block (42B-1) is the same (if the difference is within ±0.5%), it is determined that there is no fraud, or if the comparison result by the comparison block (42B-1) is the same a decision block (42C-1) having the function of determining that if not (if there is a difference greater than ±0.5%) fraud exists;
is characterized by including an information processing device (42-1: for example, a tablet) having

In addition, the fraud prevention system (100-2) of the filling facility (40-2) related to the present invention is
receiving the sealed instrumental error when the electronic seal (such as a password) of the instrumental error stored in (instrumental error adjustment unit 32) in the controller (30) of the filling device (2) is released; a block (42A-2: receiving block) for receiving instrumental errors stored outside (for example, office 34) of the filling device (2);
The instrumental error stored in (instrumental error adjustment unit 32 of) the controller (30) of the filling device (2) and the instrumental error stored outside (for example, the office 34) of the filling device (2) a comparison block (42B-2) having a function of comparing;
If the comparison result of the instrumental error by the comparison block (42B-2) is the same (if the difference is within ±0.5%), it is determined that the instrumental error has not been tampered with, or if the instrumental error is not the same a decision block (42C-2) having the function of determining that the instrumental error has been tampered with (if there is a difference greater than ±0.5%);
is characterized by including an information processing device (42-2: for example, a tablet) having

The fraud prevention method using the fraud prevention system (100) related to the present invention described above,
A step of inputting the flow rate (mass flow rate) displayed on the counter (28) of the filling device (2) into the information processing device (42);
a step of inputting the measurement result of the calibration flowmeter (7: mass flowmeter) into the information processing device (42);
The flow rate displayed by the counter (28) of the filling device (2) input to the information processing device (42) and the measurement result of the flow meter (7) for calibration input to the information processing device (42) a comparing step of comparing;
As a result of the comparison, if the flow rate displayed by the counter (28) of the filling device (2) and the measurement result of the flow meter (7) for calibration are the same (if the difference is within ±0.5%), there is fraud. It is characterized by having a judgment step of judging that it does not exist, or judging that fraud exists if it is not identical (if there is a difference greater than ±0.5%).

The fraud prevention method of the present invention using the fraud prevention system (100-1) of the present invention described above (the fraud prevention method using the fraud prevention system for filling facilities of claim 1) is as follows:
a step of inputting the flow rate (mass flow rate) displayed on the counter (28) of the filling device (2) into the information processing device (42-1);
A step of inputting the measurement result of the calibration flowmeter (7: mass flowmeter) into the information processing device (42-1);
A first change rate calculation step (counter display flow rate change rate) of calculating the change rate per unit time (first change rate) of the flow rate (mass flow rate) displayed by the counter (28) of the filling device (2) calculation process) and
A second change rate calculation step (measurement result of the flow meter 7 of the calibration device 3 change rate calculation step),
The rate of change (first rate of change) per unit time of the flow rate (mass flow rate) displayed by the counter (28) of the filling device (2) calculated in the first rate of change calculation step, and the second rate of change a comparison step of comparing the rate of change per unit time (second rate of change) of the measurement result of the calibration flowmeter (7) calculated in the rate calculation step;
As a result of the comparison step, the comparison result of the rate of change (first rate of change) calculated in the first rate of change calculation step and the rate of change (second rate of change) calculated in the second rate of change calculation step are identical (if the difference is within ±0.5%), then there is no fraud, and/or if they are not identical (if there is a difference greater than ±0.5%), there is fraud It is characterized by having a judgment step of judging that it is.

Furthermore, in the fraud prevention method related to the present invention,
When the electronic seal (password, etc.) of the instrumental error stored in (instrumental error adjustment unit 32) in the controller (30) of the filling device (2) is released, the sealed instrumental error is detected by the information processing device. (42-2) inputting;
a step of inputting the instrumental error stored outside (for example, the office 34) of the filling device (2) into the information processing device (42-2);
The instrumental error stored in (instrumental error adjustment unit 32 of) the controller (30) of the filling device (2) and the instrumental error stored outside (for example, the office 34) of the filling device (2) a comparing step of comparing;
If the comparison result in the comparison step is the same (for example, if the difference is within ±0.5%), it is determined that the instrumental error has not been tampered with, and/or if it is not the same (for example, the difference is ± and determining that the instrument error has been tampered with (if there is a difference greater than 0.5%).

In carrying out the present invention, a flow meter (mass flow meter 46) is incorporated,
A receptacle (47) on the suction side of the flow meter (46) and a nozzle (48) on the discharge side are provided. not equipped with a valve,
As the nozzle (48), it is preferable to use a filling nozzle (45) detachably attached to the receptacle (10) of the fuel cell vehicle (FCV1).
The filling nozzle (45) is preferably provided with a support device (50) (on which the nozzle 45 is placed).
And when calibrating using the filling nozzle (45),
At the end of calibration, only depressurization in the hydrogen filling device (2) is performed, and the filling nozzle (45) containing the flow meter (22) in the hydrogen filling device (2) and the separately provided flow meter (46) Do not depressurize.

The tamper-proof system (100, 100-1) of the filling facility (40) according to the present invention or related to the present invention having the configuration described above can, for example, control the flow rate inside the filling device (2) without tampering with the instrumental error. Even if the pulse signal from the meter (22) is illegally converted to change the display of the counter (28) (tampering with the pulse signal from the flow meter 22), the counter (28) of the filling device (2) will not display Compare the measured flow rate and the measurement result of the flow meter (7) for calibration, or the rate of change per unit time of the flow rate displayed on the counter (28) of the filling device (2) and the flow rate for calibration A judgment block that compares the rate of change per unit time of the measurement results of total (7) and judges that there is no fraud if the comparison results are the same, and judges that fraud exists if the comparison results are not the same. Since the information processing device (42, 42-1) having (42C, 42C-1) is included, if such fraud occurs and the display of the counter (28) is different from the actual filling amount, the fraud is immediately determined. can do
Therefore, even if fraud cannot be determined without manually inspecting the inside of the filling device (2) (for example, if the pulse signal from the flow meter 22 described above has been tampered with), the presence or absence of fraud can be accurately and quickly detected. can judge.
Further, the presence or absence of such fraud can be determined each time measurement is performed by the calibration flowmeter (7) (each time calibration is performed), thereby increasing the deterrence against such fraud.

Further, according to the fraud prevention system (100-2) of the filling facility (40-2) related to the present invention, the The instrumental error stored outside the filling device (2) is compared with the instrumental error stored outside the filling device (2). If the same, it is determined that the instrumental error has not been tampered with. Since it includes an information processing device (42-2) having the function of performing ) is not tampered with, the tampering can be detected.
Since such tampering detection can be performed each time filling is performed using the filling device (2), tampering detection can be performed reliably in a short period, and the deterrence against tampering can be enhanced.

In the present invention, a flow meter (mass flow meter 46) is incorporated, a receptacle (47) on the suction side of the flow meter (46) and a nozzle (48) on the discharge side are provided, and the receptacle (47) is the hydrogen filling device ( 2) A filling nozzle (45) that is detachable from the nozzle (5) on the side, has no check valve, and is detachable from the receptacle (10) of the fuel cell vehicle (FCV1). is used, the hydrogen filling nozzle (5) of the hydrogen filling device (2) and the receptacle (47) of the flow meter (46) are connected, and the nozzle (48) of the flow meter (46) is connected to the fuel cell vehicle (FCV1) By connecting to the receptacle (10) of the fuel cell vehicle (FCV1), hydrogen gas can be filled. With such filling, the mass flow rate of hydrogen gas can be measured by the flow meter (46), so calibration can be performed while filling.
In addition, since the nozzle (45) does not require a hose on the discharge side of the flowmeter (46) for calibration, the master meter (7) in the conventional calibration device (3) and the nozzle ( 9) does not require a hose (8) connecting to the hydrogen filling system.
Furthermore, if the hydrogen filling nozzle (45) is calibrated, only a small amount of hydrogen gas remains in the hydrogen filling nozzle (45) after the calibration is completed. ) side pressure release mechanism (pressure release valve 13, pressure release line 14), there is no need to provide a pressure release structure for the nozzle (45), and the pressure release work by the operator is not required. No need. In addition to this, a check valve or the like for preventing reverse flow from the depressurization system is not required.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the outline|summary of the filling facility which concerns on 1st Embodiment of this invention. 3 is a functional block diagram of a tablet according to the first embodiment; FIG. 4 is a flowchart showing control of the first embodiment; FIG. 5 is a functional block diagram of a tablet according to a second embodiment of the invention; 9 is a flowchart showing control of the second embodiment; FIG. 11 is an explanatory diagram showing an overview of a hydrogen station according to a third embodiment of the present invention; FIG. 11 is a functional block diagram of an instrumental error adjustment unit in the hydrogen filling device used in the third embodiment; FIG. 11 is a functional block diagram of a tablet in the third embodiment; FIG. 9 is a control flowchart of the third embodiment; FIG. 2 is an explanatory diagram of a hydrogen filling nozzle suitable for use in an embodiment of the present invention; FIG. 11 is an explanatory diagram of calibration work using the hydrogen filling nozzle shown in FIG. 10; FIG. 11 is an explanatory diagram of a support device in the hydrogen filling nozzle shown in FIG. 10; FIG. 13 is a work flow chart at the end of calibration in calibration using the hydrogen filling nozzle shown in FIGS. 10 to 12; FIG. It is an explanatory view showing calibration in the conventional technology.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the illustrated embodiment, hydrogen stations 40 and 40-2 are described as filling facilities.
1 to 9, members similar to those in FIG. 14 are denoted by the same reference numerals as in FIG.
First, a first embodiment of the present invention will be described with reference to FIGS. 1-3. In the first embodiment, fraudulent modification of the pulse transmitter 24 of the flow meter 22 in the hydrogen filling device 2 to deceive the flow rate displayed on the counter 28 is detected. Specifically, the flow rate displayed on the counter 28 of the hydrogen filling device 2 is compared with the measurement result of the flow meter 7 of the calibration device 3 to determine whether or not there has been unauthorized modification.
Reference numeral 100 (100-1) in FIG. 1 is used to comprehensively indicate the fraud prevention system 100 according to the first embodiment and the fraud prevention system 100-2 according to the second embodiment.
In FIG. 1, a hydrogen station 40 to which the fraud prevention system 100 according to the first embodiment is applied has a hydrogen filling device 2 . The hydrogen filling device 2 is connected to, for example, a receptacle 10 of a fuel cell vehicle 1 (FCV) via a hydrogen filling hose 4, a calibration flowmeter 7 (master meter) of the calibration device 3, and a filling nozzle 9. When the FCV 1 is filled with hydrogen, the hydrogen gas flows through the calibration flowmeter 7, the mass flow rate of the filled hydrogen gas is measured by the calibration flowmeter 7, and the flowmeter 22 of the hydrogen filling device 2 is calibrated. can do

A filling system (not shown) of the hydrogen filling device 2 is interposed with a flow meter 22, and the measurement result of the flow meter 22 is sent as a pulse signal from a pulse signal generator 24 to a counter 28 via a signal line SL1. transmitted and displayed on the counter 28.
The hydrogen filling device 2 has a control unit 30 and has a function of executing hydrogen filling control according to a hydrogen filling protocol. The control unit 30 includes an instrumental error adjustment unit 32 that records and stores an instrumental error of the flowmeter 22 .
The hydrogen station 40 is provided with an office 34 outside the hydrogen filling device 2 , and the office 34 includes a storage device 36 for storing the instrumental error of the flowmeter 22 . Information (for example, information about hydrogen filling) can be exchanged between the storage device 36 in the office 34 and the hydrogen filling device 2 .

In FIG. 1, the fraud prevention system 100 of the first embodiment includes a tablet 42 as an information processing device, and the tablet 42 is held by, for example, an operator.
The tablet 42 and the counter 28 of the filling device 2 can communicate with each other, for example, by infrared communication (IR communication). is sent to the tablet 42 via the
The tablet 42 and the calibration flowmeter 7 can also communicate with each other, for example, by infrared communication (IR communication). is sent to the tablet 42 via the
Such transmission can be performed by another wireless device not shown, or can be performed via a signal line not shown.
In the illustrated embodiment, the hydrogen station 40 is shown as the filling facility, but it can also be applied to a fueling device that fills a liquid such as gasoline or light oil.

As shown in FIG. 2, the tablet 42, which is an information processing device, has a reception block 42A, a comparison block 42B, a judgment block 42C and a judgment result display block 42D.
The receiving block 42A has a function of receiving "the flow rate (mass flow rate) displayed on the counter 28" from the counter 28 of the filling device 2 via the communication line CL1. Further, the reception block 42A has a function of receiving "measurement result of the flowmeter 7 for calibration" from the flowmeter 7 (mass flowmeter) of the calibration device 3 via the communication line CL2.
The "flow rate displayed by the counter 28" received by the receiving block 42A is transmitted to the comparison block 42B via the signal line SL2, and the "measurement result of the flow meter 7 for calibration" received by the receiving block 42A is a signal It is sent to comparison block 42B via line SL3.

The comparison block 42B has a function of comparing the "flow rate displayed on the counter 28" and the "measurement result of the flow meter 7 for calibration" transmitted from the reception block 42A. The comparison result of comparison block 42B is sent to decision block 42C via signal line SL4.
The judgment block 42C has a function of judging the presence or absence of fraud based on the comparison result received from the comparison block 42B. That is, if the difference between the "flow rate (mass flow rate) displayed on the counter 28" and the "measurement result of the flow meter 7 for calibration" (hereinafter referred to as "both") is within ±0.5%, the same and judge that there is no fraud. Also, if the difference between the two is greater than ±0.5%, for example, it is determined that they are not the same, and that fraud exists.
The determination result by the determination block 42C is transmitted to the determination result display block 42D via the signal line SL5. The judgment result display block 42D has a function of displaying the judgment result received from the judgment block 42C on a display (not shown) of the tablet 42. FIG. The operator (staff in charge of fraud prevention) can check the presence or absence of fraud based on the judgment result displayed, and can deal with fraud prevention.

Next, with reference to FIGS. 1 and 2, and mainly with reference to FIG. 3, the control procedure in the first embodiment will be described.
In FIG. 3, in step S1, the operator operates the tablet 42 to request the counter 28 of the filling device 2 to transmit the "flow rate displayed on the counter 28" via the communication line CL1 (wireless). . It also requests the flowmeter 7 of the calibration device 3 to transmit the "measurement result of the flowmeter 7" via the communication line CL2 (wireless). Then, the process proceeds to step S2 and step S3.
In step S2, based on the request from the tablet 42 in step S1, the "flow rate displayed on the counter 28" is input to the reception block 42A of the tablet 42 via the wireless communication line CL1 (input step).
In step S3, based on the request from the tablet 42 in step S1, the "measurement result of the flow meter 7 for calibration" is input to the reception block 42A of the tablet 42 via the wireless communication line CL2 (input step).

In step S4, the "flow rate displayed on the counter 28" input in step S2 is compared with the "measurement result of the flow meter 7 for calibration" input (in the reception block 42A) in step S3 (comparison step ). Such a comparison process is performed by the comparison block 42B of the tablet 42. FIG.
In the next step S5, the result of the comparison in step S4 is received, and it is determined whether or not the "flow rate displayed on the counter 28" and the "measurement result of the flow meter 7 for calibration" are the same (determination step). . As described above, if the difference between the "flow rate displayed on the counter 28" and the "measurement result of the flow meter 7 for calibration" is, for example, within ±0.5%, the two are judged to be the same, and the difference is For example, if it is greater than ±0.5%, it is determined that the two are not the same. Such a determination is made by decision block 42C of tablet 42. FIG.
As a result of the determination in step S5, if the "flow rate displayed on the counter 28" and the "measurement result of the flow meter 7 for calibration" are the same ("Yes" in step S5), the process proceeds to step S6, and "the flow rate displayed on the counter 28 If the "displayed flow rate" and the "measurement result of the flow meter 7 for calibration" are not the same ("No" in step S5), the process proceeds to step S7.

Step S6 (if both are the same) determines "no cheating" by decision block 42C. On the other hand, in step S7, the decision block 42C decides that "injustice exists" (decision step).
The determination results of the determination block 42C in steps S5 to S7 are displayed on the display of the determination result display block 42D and visualized, thereby serving as anti-fraud measures for the operator.

According to the fraud prevention system 100 according to the first embodiment shown in FIGS. are the same (if the difference is within ±0.5%), it is judged that fraud does not exist, and if the comparison results are not identical (if the difference is greater than ±0.5%), it is judged that fraud exists It has a decision block (42C) that
Therefore, although the instrumental error is not tampered with, even if the pulse signal from the flow meter 22 inside the filling device 2 is illegally converted to change the display of the counter 28, the display of the counter 28 may change due to such illegality. If it differs from the filling amount, it is possible to immediately judge fraud. Since the determination of the presence or absence of such fraud can be made each time measurement is performed by the calibration flowmeter 7 (each time calibration is performed), the deterrence against such fraud increases.

As described above, in the first embodiment shown in FIGS. 1 to 3, the flow rate displayed on the counter 28 of the filling device 2 is compared with the measurement result of the flow meter 7 for calibration (of the calibration device 3). The presence or absence of fraud is detected. Here, the change rate of the flow rate displayed on the counter 28 and the change rate of the measurement result of the flow meter 7 for calibration are obtained, and by comparing the change rates, unauthorized modification of the pulse transmitter 24 can be detected. can be done. The second embodiment shown in FIGS. 4 and 5 is proposed based on such knowledge, and the rate of change per unit time of the flow rate displayed on the counter 28 of the filling device 2 and the flow meter for calibration Unauthorized modification of the pulse transmitter is detected by comparing the rate of change per unit time of the measurement results of 7.
With reference to FIG. 4 which is a functional block diagram of the tablet 42-1 in the fraud prevention system 100-1 (see FIG. 1) according to the second embodiment and FIG. An embodiment will be described.
In FIG. 4, the tablet 42-1 includes a reception block 42A-1, a first change rate calculation block 42E-1 (counter display flow rate change rate calculation block), and a second change rate calculation block 42F-1 (calibration device block), a comparison block 42B-1, a determination block 42C-1, and a determination result display block 42D-1.
In the following description, mainly the parts different from the block diagram of the tablet 42 of the first embodiment shown in FIG. 2 will be described.

The reception block 42A-1 receives the "flow rate (mass flow rate) displayed on the counter 28" received from the counter 28 of the filling device 2 via the wireless communication line CL1, and converts it to the first rate of change via the signal line SL6. It has a function of transmitting to the calculation block 42E-1 (counter display flow rate change rate calculation block).
In addition, the receiving block 42A-1 receives the "measurement result of the flowmeter 7 for calibration" received from the flowmeter 7 (mass flowmeter) for calibration (of the calibration device 3) via the wireless communication line CL2, It has a function of transmitting to the second change rate calculation block 42F-1 (change rate calculation block of the measurement result of the flowmeter of the calibration device) via the signal line SL7.
Based on the received "flow rate displayed by the counter 28", the first change rate calculation block 42E-1 also uses the measurement result of the timer 42G-1 to calculate "per unit time of the flow rate displayed by the counter 28 has a function of calculating the rate of change of (first rate of change). The calculation result of the first change rate calculation block 42E-1 is sent to the comparison block 42B-1 via the signal line SL8.
The second rate-of-change calculation block 42F-1 uses the measurement result of the timer 42G-1 based on the received "measurement result of the flow meter 7 of the calibration device 3" to calculate the "measurement result of the flow meter 7 of the calibration device 3 It has a function of calculating the rate of change (second rate of change) per unit time of the measurement result. The calculation result of the second change rate calculation block 42F-1 is sent to the comparison block 42B-1 via the signal line SL9.

The comparison block 42B-1 receives the "rate of change per unit time of the flow rate displayed by the counter 28" received from the first change rate calculation block 42E-1 and the second change rate calculation block 42F-1. It has a function of comparing the "change rate per unit time of the measurement result of the flow meter 7 of the calibration device 3".
The comparison result of comparison block 42B-1 is sent to decision block 42C-1 via signal line SL10.
The judgment block 42C-1 has a function of judging the presence or absence of fraud based on the comparison result received from the comparison block 42B-1.
That is, the difference between "the rate of change per unit time of the flow rate (mass flow rate) displayed on the counter 28" and "the rate of change per unit time of the measurement result of the flow meter 7 for calibration" is ±0.5, for example. % or less, it is determined that they are the same, and if they are the same, it is determined that there is no fraud. If the difference between the two is greater than, for example, ±0.5%, it is determined that they are not the same, and if they are not the same, it is determined that fraud exists.
The determination result of the determination block 42C-1 is transmitted to the determination result display block 42D-1 via the signal line SL11.

While referring to FIGS. 1 and 4, mainly referring to FIG. 5, the control procedure of the second embodiment will be described. In describing the control of the second embodiment, the differences from the work procedure of the first embodiment shown in FIG. 3 will be mainly described.
In FIG. 5, in step S11, the operator operates the tablet 42-1 to request the counter 28 of the filling device 2 to transmit the "flow rate displayed on the counter 28", and 7 is requested to send the "measurement result of the flow meter 7". Then, the process proceeds to steps S12 and S13.
In step S12, based on the request from the tablet 42-1 in step S11, the "flow rate displayed on the counter 28 of the filling device 2" is input to the receiving block 42A-1 of the tablet 42-1 via the communication line CL1. (input step). Then, the process proceeds to step S14.
In step S14, "the rate of change per unit time (first rate of change) of the flow rate displayed by the counter 28" is calculated (step of calculating the flow rate change rate displayed by the counter). This calculation is executed by the first change rate calculation block 42E-1 (counter display flow rate change rate calculation block). Then, the process proceeds to step S16.

In step S13, based on the request from the tablet 42-1 in step S11, the "measurement result of the flow meter 7 for calibration" is input to the reception block 42A-1 of the tablet 42-1 via the communication line CL2. (input process). Then, the process proceeds to step S15.
In step S15, the "rate of change per unit time (second rate of change) of the measurement result of the flow meter 7 of the calibration device 3" is calculated (rate of change calculation step of the measurement result of the flow meter 7 of the calibration device 3). . This calculation is executed by the second change rate calculation block 42F-1 (change rate calculation block for the measurement result of the flowmeter of the calibration device). Then, the process proceeds to step S16.
In step S16, the "change rate per unit time of the flow rate displayed by the counter 28" calculated in step S14 and the "change rate per unit time of the measurement result of the flow meter 7 for calibration" calculated in step S15 are calculated. Compare (comparison step). The comparison process is performed by the comparison block 42B-1 of the tablet 42-1.

In the next step S17, based on the comparison result in step S16, "rate of change per unit time of the flow rate displayed on the counter 28 of the filling device 2" and "per unit time of the measurement result of the flowmeter 7 for calibration" It is judged whether or not the rate of change is the same (judgment step).
In the determination process of step S17, the difference between "the rate of change per unit time of the flow rate displayed on the counter 28" and "the rate of change per unit time of the measurement result of the flow meter 7 for calibration" is, for example, ±0. If the difference is within 5%, the two are determined to be the same, and if the difference is greater than ±0.5%, for example, the two are determined not to be the same. This decision is made by decision block 42C-1.
As a result of the determination in step S17, if the "change rate per unit time of the flow rate displayed on the counter 28" and the "change rate per unit time of the measurement result of the flow meter 7 for calibration" are the same (step S17 "Yes") proceeds to step S18. On the other hand, if the "change rate per unit time of the flow rate displayed on the counter 28" and the "change rate per unit time of the measurement result of the flow meter 7 for calibration" are not the same (step S17 is "No"), Go to step S19.

At step S18 (if the first and second rates of change are the same), decision block 42C-1 determines that "fraud does not exist" (decision step).
On the other hand, in step S19 (if the first and second rates of change are not the same), decision block 42C-1 decides that "fraud exists" (decision step).
In the second embodiment shown in FIGS. 4 and 5 as well, it is possible to determine the presence or absence of unauthorized modification each time calibration is performed. Other configurations and effects of the second embodiment shown in FIGS. 4 and 5 are the same as those of the first embodiment shown in FIGS.

Next, a third embodiment of the present invention will be described with reference to FIGS. 6 to 9. FIG.
In the fraud prevention systems 100 and 100-1 of the first embodiment and the second embodiment of FIGS. or the rate of change thereof to detect unauthorized modification of the pulse signal transmitter 24 . On the other hand, in the fraud prevention system 100-2 of the third embodiment shown in FIGS. Detects whether or not the difference has been tampered with.
A hydrogen station 40-2 shown in FIG. 6 is similar to the hydrogen station 40 in FIG. However, in FIG. 1 (first and second embodiments), the tablet 42 (42-1) can communicate with the counter 28 and calibration flowmeter 7 of the filling device 2 via wireless communication lines CL1 and CL2. 6 (third embodiment), the tablet 42-2 can communicate with the instrumental error adjustment unit 32 of the control device 30 and the storage device 36 in the office 34 via the communication lines CL3 and CL4. is configured to
In FIG. 6, the filling nozzle 9 at the tip of the filling hose 4 is directly connected to the receptacle 10 of the fuel cell vehicle 1 without going through the calibration flowmeter, and tampering with the instrumental error is checked during filling. Similar to FIG. 1, when the FCV 1 is filled with hydrogen via the calibration flowmeter 7, it is possible to check for instrumental error tampering.

In FIG. 6, the control unit 30 of the filling device 2 includes an instrumental error adjustment unit 32, which records and stores the instrumental error of the flow meter 22 of the filling device 2 in an electronically sealed state. there is
Although not clearly shown, the control device 30 of the hydrogen filling device 2 is configured to exchange information with a storage device 36 in an external office 34 . The instrumental errors recorded in the instrumental error adjustment unit 32 are then stored in the storage device 36 in the office 34 according to existing procedures.
In other words, in the storage device 36 in the office 34, the same instrumental error as recorded and stored in the instrumental error adjustment unit 32 is stored in an electronically sealed state if it is in an appropriate state. set to always be the same. If both instrumental errors are compared and the two are different, it can be determined that the instrumental error has been tampered with.
The tablet 42-2 can communicate with the instrumental error adjustment unit 32 of the control device 30 via the wireless communication line CL3. 42-2. The tablet 42-2 can communicate with the storage device 36 in the office via the wireless communication line CL4, and the instrumental error stored in the storage device 36 is transmitted to the tablet 42-2 via the wireless communication line CL4. be.

In FIG. 7, the instrumental error adjustment unit 32 has a transmission/reception block 32A, a seal release judgment block 32B, a sealing block 32C, a storage block 32D and an instrumental error setting block 32E.
The transmission/reception block 32A receives a request for instrumental error reference from the tablet 42-2 (for example, a request to transmit a password for releasing the electronic seal) via the communication line CL3, and seals the request signal via the signal line SL12. It has a function of transmitting to the cancellation determination block 32B.
The seal release determination block 32B has a function of determining whether or not the seal can be released based on the instrument error reference request received from the transmission/reception block 32A (based on a password transmission request for electronic sealing, etc.). If the seal can be released (appropriate), an electronic seal release signal is sent from the seal release determination block 32B to the seal block 32C via the signal line SL13. As a result of the determination, if the seal cannot be released (improper), the request for instrument error reference from the tablet 42-2 is rejected, and the electronic seal release signal is not sent to the seal block 32C.
The sealing block 32C has a function of releasing the sealing of the instrumental error in the instrumental error adjustment unit 32 when receiving the electronic sealing release signal from the sealing release judgment block 32B. After releasing the seal, the sealing block 32C transmits an instrumental error transmission signal (a signal indicating permission to transmit an instrumental error) to the storage block 32D via the signal line SL14.

The storage block 32D has a function of transmitting the instrumental error recorded and stored in the storage block 32D to the transmission/reception block 32A via the signal line SL15 based on the instrumental error transmission signal received from the sealing block 32C. . The unsealed instrumental error is transmitted from the transmission/reception block 32A to the tablet 42-2 via the wireless communication line CL3.
The instrumental error setting block 32E has a function of newly setting an instrumental error. For example, if the instrumental error is different from the previous one as a result of calibration, or if the instrumental error has been tampered with as described later, the instrumental error setting command transmitted via the signal line SL16 A new instrumental error is set by the setting block 32E. The new instrumental error set by the instrumental error setting block 32E is transmitted to the memory block 32D via the signal line SL17, and the new instrumental error is recorded in the memory block 32D.

In FIG. 8, a tablet 42-2 as an information processing device has a reception block 42A-2, a comparison block 42B-2, a determination block 42C-2 and a determination result display block 42D-2.
The receiving block 42A-2 receives the "instrumental error stored in the instrumental error adjusting unit 32 (filling apparatus 2 side)" from the instrumental error adjusting unit 32 of the controller 30 of the filling apparatus 2 via the wireless communication line CL3. It has a function to receive.
Further, the reception block 42A-2 transmits the "instrumental error stored in the storage device 36 (office 34 side)" from the storage device 36 arranged in the office 34 outside the filling device 2 to the wireless communication line CL4. It has the function of receiving via In order for the reception block 42A-2 of the tablet 42-2 to acquire the instrumental error from the instrumental error adjustment unit 32 in the control device 30 and the storage device 36 in the office 34, a procedure (password , etc.), the procedure for releasing the electronic seal has been described above with reference to FIG. 7, so the illustration of the procedure for releasing the seal is omitted in FIG.
The "instrumental error stored in the instrumental error adjustment unit 32" received by the receiving block 42A-2 is transmitted to the comparing block 42B-2 via the signal line SL18, and the "storage device 36 is transmitted to comparison block 42B-2 via signal line SL19.

The comparison block 42B-2 has the function of comparing the "instrumental error stored in the instrumental error adjustment unit 32" and the "instrumental error stored in the storage device 36" transmitted from the reception block 42A-2. ing. The comparison result of comparison block 42B-2 is sent to decision block 42C-2 via signal line SL20.
The judgment block 42C-2 has a function of judging whether or not there is fraud (falsification) based on the comparison result received from the comparison block 42B-2. As a result of comparing the "instrumental error stored in the instrumental error adjusting unit 32" and the "instrumental error stored in the storage device 36 (of the office 32) outside the instrumental error adjusting unit 32", the difference between the two is is within ±0.5%, for example, it is determined that they are the same, and that the instrumental error has not been tampered with. On the other hand, if the difference between the two is greater than ±0.5%, for example, it is determined that they are not the same, and that the instrumental error has been tampered with.
The determination result of the determination block 42C-2 is transmitted to the determination result display block 42D-2 via the signal line SL21.
The judgment result display block 42D has a function of displaying the judgment result received from the judgment block 42C on a display (not shown) of the tablet 42. FIG.

Next, the control of the third embodiment will be described mainly with reference to FIG. 9 while referring to FIGS. 6 to 8. FIG.
In FIG. 9, in step S21, the operator operates the tablet 42-2 to send the message "stored in the instrumental error adjusting unit 32" to the instrumental error adjusting unit 32 of the filling device 2 via the wireless communication line CL3. "Transmit instrumental error". It also requests the storage device 36 in the office 34 to "transmit the instrumental error stored in the storage device 36" via the wireless communication line CL4. Then, the process proceeds to steps S22 and S23.
In step S22, a request for instrumental error transmission is received from the tablet 42-2, the electronic seal of the instrumental error adjustment unit 32 is released, and the process proceeds to step S24. The release of the electronic seal is executed by the seal release determination block 32B of the instrumental error adjustment unit 32, taking into consideration the password for releasing the electronic seal in the request for the instrumental error transmission. If the password or the like is not correct, the electronic seal is not released, and the instrumental error of the instrumental error adjustment unit 32 is not transmitted to the tablet 42-2.
In step S24, "the instrumental error stored in the instrumental error adjustment unit 32 on the filling device side" is transmitted to the tablet 42-2 (the instrumental error is called to the tablet 42-2). When calling the instrumental error, the instrumental error adjustment unit 32 transmits the "stored instrumental error" to the tablet 42-2 via the wireless communication line CL3, and the reception block 42A-2 of the tablet 42-2 receives it. (input process). Then, the process proceeds to step S26.

In step S23, the request for transmission of the instrumental error is received from the tablet 42-2 in step S21, the electronic sealing of the instrumental error recorded in the storage device 36 on the office side is released, and the process proceeds to step S25. The electronic seal is released by the storage device 36 in consideration of the electronic seal release password or the like in the instrumental error transmission request. If the password or the like is not correct, the electronic seal is not released, and the instrumental error of the storage device 36 is not transmitted to the tablet 42-2.
In step S25, "the instrumental error stored in the storage device 36 on the office side" is transmitted to the tablet 42-2 (the instrumental error is called to the tablet 42-2). When calling the instrumental error, the storage device 36 transmits the "stored instrumental error" to the tablet 42-2 via the wireless communication line CL4, and the reception block 42A-2 of the tablet 42-2 receives it. (input process). Then, the process proceeds to step S26.

In step S26, the "instrumental error stored in the instrumental error adjustment unit 32 (filling device side)" input in step S24 and the "instrumental error stored in the storage device 36 (office side)" input in step S25. The "instrumental error" is compared (comparison step). The comparison process is performed by comparison block 42B-2.
In the next step S27, the comparison result of step S26 is received, and the "instrumental error stored in the instrumental error adjustment unit 32 (filling device side)" and the "instrumental error stored in the storage device 36 (office side)."difference" is the same (judgment step).
This determination step is executed by the determination block 42C-2 as described above, and the "instrumental error stored in the instrumental error adjustment unit 32 (filling device side)" and the "instrumental error stored in the storage device 36 (office side)" are determined. If the difference in "instrumental error" is, for example, within ±0.5%, the two are determined to be the same, and if the difference is greater than, for example, ±0.5%, the two are determined not to be the same.
As a result of the determination in step S27, if the "instrumental error stored in the instrumental error adjustment unit 32 (filling device side)" and the "instrumental error stored in the storage device 36 (office side)" are the same (step If S27 is "Yes"), the process proceeds to step S28. On the other hand, if the "instrumental error stored in the instrumental error adjustment unit 32 (filling device side)" and the "instrumental error stored in the storage device 36 (office side)" are not the same ("No" in step S27). ) proceeds to step S29.

At step S28 (if both are the same), the decision block 42C-2 determines that "the instrumental error has not been tampered with".
On the other hand, in step S29 (if the two are not the same), the decision block 42C-2 decides that "instrumental error has been tampered with".
The determination results of steps S27 to S29 are displayed and visualized on the display of the determination result display block 42D-2, and are used for anti-fraud measures.

According to the fraud prevention system 100-2 for the filling device 2 according to the third embodiment of the present invention shown in FIGS. The instrumental errors stored in the storage device 36 installed in the office 34 outside the apparatus 2 are compared, and if they are the same, it is determined that the instrumental error has not been tampered with. judged to have been
Therefore, even if the instrumental error is tampered with by a fraudulent act, both the instrumental error of the instrumental error adjustment unit 32 in the filling apparatus 2 and the instrumental error stored in the storage device 36 of the office 34 outside the filling apparatus 2 are deleted. As long as it is not tampered with to the same numerical value, the tampering can be detected.
Further, since such tampering detection can be performed each time filling is performed using the filling device 2, tampering detection can be reliably performed in a short cycle, thereby enhancing the deterrence against tampering.

In the illustrated embodiment, instead of using the calibration device 3 as shown in FIG. 14, it is preferable to calibrate with a nozzle having a mass flow meter and thus determine the instrumental error.
When such a nozzle is used, the mass flowmeter provided with the nozzle is used as the calibration flowmeter.
Nozzles (nozzles with mass flow meters) suitable for use in the illustrated embodiment are described below with reference to FIGS. 10-13. In FIGS. 10 to 13, members similar to those shown in FIGS. 1, 6 and 14 are indicated by the same reference numerals.
In FIG. 10, a hydrogen filling nozzle suitable for use with the illustrated embodiment is indicated generally at 45 .
The filling nozzle 45 incorporates a flowmeter 46 (mass flowmeter) and has a flowmeter suction side receptacle 47 and a flowmeter discharge side nozzle 48 . The filling nozzle 45 also has a support device 50 which will be described later with reference to FIG.
The flowmeter suction side receptacle 47 is detachably attached to the filling nozzle 5 at the tip of the filling hose 4 of the hydrogen filling device 2 (FIG. 11). The flowmeter suction side receptacle 47 does not incorporate a check valve.
The flowmeter discharge side nozzle 48 is configured in the same manner as the nozzle 9 shown in FIGS. It is configured.

In FIG. 11, the hydrogen filling device 2 includes a depressurizing mechanism (a shutoff valve 12, a depressurizing valve 13, a depressurizing It has a system 14).
10 and 11, the filling nozzle 5 of the hydrogen filling device 2 is connected to the receptacle 47 on the flow meter suction side of the hydrogen filling nozzle 45, and the flow meter discharge side nozzle 48 of the hydrogen filling nozzle 45 is connected to the receptacle 10 of the FCV 1. Then, when the FCV 1 is filled with hydrogen, hydrogen gas flows through the flowmeter 46 through the hydrogen filling device 2, the filling hose 4, the filling nozzle 5, and the flowmeter suction side receptacle 47. is measured and calibrated.

Compared to the conventional calibration shown in FIG. 14, the hydrogen filling nozzle 45 shown in FIG. 10 does not have the hydrogen filling hose 8 (FIG. 14) on the discharge side of the flow meter, so the heat capacity and pressure loss in the hydrogen filling system are reduced accordingly. , hydrogen filling according to the hydrogen filling protocol can be performed with the filling characteristics in the defined filling protocol.
The mass flow rate measured by the flow meter 46 is transmitted to an information processing device (eg, tablet 42: FIGS. 1 and 6) held by the operator by a wireless transmission device (eg, infrared communication) not shown. In the tablet, it is possible to calculate the instrumental error of the flow meter (22: FIGS. 1, 6, and 14) on the side of the hydrogen filling device 2 based on the measurement result of the flow meter 46 and create a calibration report. is.
The hydrogen filling nozzle 45 is a nozzle that functions as a calibration device, and by using this hydrogen filling nozzle 45, calibration can be performed in the same manner as normal hydrogen filling.

As noted above, there is no fill hose between flow meter 46 and FCV 1 receptacle 10, and receptacle 47 does not incorporate a check valve. The amount of hydrogen gas remaining in the hydrogen filling nozzle 45 after hydrogen filling is very small. It is automatically discharged by the depressurizing mechanism (depressurizing valve 13, depressurizing system 14) on the device 2 side.
Therefore, it is not necessary to provide a depressurization mechanism in the filling nozzle 45, and the work of depressurizing the filling nozzle 45 side by the operator is unnecessary, and the equipment used for calibration is also simplified.

In FIG. 12, a support device 50 for supporting the filling nozzle 45 is provided.
The support device 50 includes a body portion 51 and a carriage portion 52 , and the filling nozzle 45 is mounted and fixed near the upper end of the body portion 51 . The filling nozzle 45 placed on the body portion 51 can be rotated (arrow A1) about the longitudinal direction of the body portion 51 of the support device 50, and the horizontal plane (not shown) of the filling nozzle 45 can be rotated. The tilt can be adjusted as indicated by arrow A2.
Since the heavy filling nozzle 45 containing the flow meter 46 is supported by the support device 50, the heavy weight of the filling nozzle 45 is not applied to the receptacle 10, and damage to the receptacle 10 can be prevented.
Further, since the carriage portion 52 on which the main body portion 51 is placed is provided, the support device 50 with the heavy filling nozzle 45 placed thereon can be easily moved.
Further, in the illustrated support device 50, the longitudinal length of the body portion 51 is adjustable by a known mechanism, and the height position of the flow meter discharge side nozzle 48 is adjustable in the vertical direction (arrow A3 direction). and

With reference to FIG. 13, a procedure for completing calibration when the illustrated filling nozzle 45 is used will be described.
In step S31, it is determined whether or not to end the filling (or calibration). During hydrogen filling, the pressure is checked by the pressure gauge 22 (FIGS. 1 and 6) arranged on the discharge side of the hydrogen filling device 2 (FIG. 11), so that the pressure on the discharge side of the hydrogen filling device 2 is kept at a predetermined level. A value (for example, 80 MPa) or more is determined, and if the pressure reaches a predetermined value or more, it is determined that "filling (calibration) is completed".
In step S31, if the filling is finished ("Yes" in step S31), the process proceeds to step S32.

In step S32 (finish filling), the cutoff valve 12 (FIG. 11) of the hydrogen filling device 2 is closed, and the process proceeds to step S33.
In step S33, the depressurization valve 13 (FIG. 11) of the hydrogen filling device 2 is opened to depressurize the hydrogen gas remaining in the hydrogen filling device 2 through the depressurization system 14 (FIG. 11).
By opening the depressurization valve 13, the hydrogen gas remaining in the filling hose 4 (FIG. 11) and the filling nozzle 5 (FIG. 11) on the hydrogen filling device 2 side is discharged and remains in the hydrogen filling nozzle 45. Even a very small amount of hydrogen gas passes through the receptacle 47 on the intake side of the flow meter, which does not have a built-in check valve, the filling nozzle 5 on the side of the hydrogen filling device 2, and the filling hose 4. It is discharged (automatic depressurization) through the system 14 .

In step S34, it is determined whether or not the automatic depressurization of the hydrogen filling device 2 in step S33 has ended. In step S34, when the pressure on the discharge side of the hydrogen filling device 2 becomes equal to or lower than the reference pressure (for example, 1 MPa) for depressurization, it is determined that "automatic depressurization is completed".
If automatic depressurization is completed in step S34 ("Yes" in step S34), the process proceeds to step S35.
In step S35 (automatic depressurization ends), the cutoff valve 12 of the hydrogen filling device 2 is opened and the depressurization valve 13 is closed. Then, the process proceeds to step S36.
In step S36, the flowmeter discharge side nozzle 48 of the filling nozzle 45 is removed from the receptacle 10 on the FCV1 side. Since the hydrogen in the hydrogen filling nozzle 45 is depressurized in step S33, it is not necessary to depressurize the hydrogen filling nozzle 45 in step S36. In other words, if the filling nozzle 45 shown in the figure is used, only the depressurization in the hydrogen filling device 2 is performed at the end of calibration, and the flow meter in the hydrogen filling device 2 is separately provided in the filling nozzle 45. The flow meter 46 is not depressurized.

It should be noted that the illustrated embodiment is merely an example and is not intended to limit the technical scope of the present invention.

1... fuel cell vehicle (FCV)
2... Filling device (hydrogen filling device)
3... Calibration device 4... Filling hose on the hydrogen filling device side 5... Nozzles on the hydrogen filling device side 7, 46... Flow meter (mass flow meter)
8 Flowmeter discharge side hose 9 Filling nozzle 10 Receptacle (receptacle on fuel cell vehicle side)
22 Flow meter on filling device side 28 Counter 30 Control device 32 Instrument error adjustment unit 34 Office 36 Storage devices 42, 42-1, 42-2・・・Tablet (information processing equipment)
42A, 42A-1, 42A-2 ... reception blocks 42B, 42B-1, 42B-2 ... comparison blocks 42C, 42C-1, 42C-2 ... decision blocks 42D, 42D-1, 42D- 2 ... Judgment result display block 42E-1 ... First change rate calculation block (counter display flow rate change rate calculation block)
42F-1: Second rate of change calculation block (rate of change calculation block for the measurement result of the flow meter of the calibration device)
45 Filling nozzle 47 Flowmeter suction side receptacle 48 Flowmeter discharge side nozzle 50 Support devices 100, 100-1, 100-2 Fraud prevention system

Claims (2)

a block having a function of receiving the flow rate indicated by the counter of the filling device and the measurement result of the flow meter for calibration;
a first rate-of-change calculation block that calculates the rate of change per unit time of the flow rate displayed by the counter of the filling device;
a second rate-of-change calculation block for calculating the rate of change per unit time of the measurement result of the flowmeter for calibration;
The rate of change per unit time of the flow rate displayed by the counter of the filling device calculated by the first rate of change calculation block and the unit of the measurement result of the flow meter for calibration calculated by the second rate of change calculation block a comparison block having the ability to compare rates of change over time;
A judgment block having a function of judging that there is no fraud if the comparison results of the comparison block are the same, or judging that fraud exists if the comparison results of the blocks to be compared are not the same;
A fraud prevention system for a filling facility, comprising an information processing device having A step of inputting the flow rate displayed on the counter of the filling device into the information processing device;
A step of inputting the measurement result of the flow meter for calibration into the information processing device;
a first rate-of-change calculation step of calculating the rate of change per unit time of the flow rate displayed on the counter of the filling device;
a second rate-of-change calculation step of calculating the rate of change per unit time of the measurement result of the flowmeter for calibration;
The rate of change per unit time of the flow rate displayed on the counter of the filling device calculated in the first change rate calculation step and the unit of the measurement result of the flow meter for calibration calculated in the second change rate calculation step a comparing step of comparing rates of change over time;
judging that there is no fraud if the comparison result of the change rate calculated in the first change rate calculation step and the change rate calculated in the second change rate calculation step is the same as a result of the comparison step; and / Or, a fraud prevention method for a filling facility, characterized by having a judgment step of judging that fraud exists if they are not the same.

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