Fraud detection device and fraud detection method

Abstract

To provide a fraud detection device and a fraud detection method which can prevent damage caused by a fraudulent activity using an illegal magnetic field generating source.SOLUTION: A fraud detection device installed in a game machine includes: a calculation part (32) which determines a non-fraud detection, when determining that, even when a magnetic field from a game machine (1) is a predetermined threshold value, it is due to a magnetic mechanism (10) within the game machine rather than variation of the magnetic field; and a timer (33) which measures a time during which the magnetic field from the game machine continues for the predetermined threshold value or more, after the non-fraud detection is determined. When a measured time is equal to or more than a predetermined time, the calculation part changes a detection result to a fraud detection.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an illegal detection device for identifying whether an illegal magnetic field source has approached or is installed in a gaming machine, and an illegal detection method.

Background Art

[0002] A gaming machine can launch an iron game ball, and the user can win by putting the game ball into a predetermined winning hole. Therefore, there may be an illegal act of approaching an illegal magnetic field source such as a magnet to the gaming machine and controlling the movement of the iron game ball to guide the game ball into the winning hole.

[0003] In a gaming machine, when a predetermined condition is satisfied, an internal magnetic mechanism such as a solenoid is operated to open a closed winning hole. Therefore, in order to suppress the above illegal act, it is necessary to determine whether it is a magnetic field generated by the internal magnetic mechanism or a magnetic field generated by an illegal magnetic field source.

[0004] As a countermeasure against the above illegal act, Patent Document 1 discloses a technique of installing a magnetic detection unit and analyzing the amount of change of the detection output with respect to time when a change indicating that the detection output from the magnetic detection unit rises, to determine whether it is a magnetic field generated by an illegal magnetic field source or a magnetic field generated by the operation of an internal magnetic mechanism.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the technology described in Patent Document 1, if the waveform of the magnetic field increase due to the operation of the internal magnetic mechanism and the waveform of the magnetic field increase due to the approach of an illegal magnetic field source show similar shapes, it may be mistakenly determined that the increase is due to the operation of the internal magnetic mechanism, even though it is actually due to an illegal magnetic field source. In the technology described in Patent Document 1, if a misjudgment occurs, there is no opportunity to review the judgment, which could lead to the continuation of fraudulent activities and significant damage.

[0007] One aspect of the present invention aims to propose a fraud detection device and fraud detection method that can suppress damage caused by fraudulent activities using illegal magnetic field sources. [Means for solving the problem]

[0008] To solve the above problems, a fraud detection device according to one aspect of the present invention is installed in a gaming machine and detects fraud when a magnetic field above a predetermined threshold is detected based on the magnetic field from the gaming machine. The device comprises a determination unit that determines that fraud is not detected if it is determined from the change in the magnetic field that the magnetic field from the gaming machine is above the predetermined threshold, and a time measurement unit that measures the time during which the magnetic field from the gaming machine remains above the predetermined threshold after the determination unit has determined that fraud is not detected. The determination unit changes the determination result to fraud detection when the time measurement unit's measurement time exceeds a predetermined time.

[0009] To solve the above problems, another aspect of the present invention provides a fraud detection method installed in a gaming machine, which detects fraud when a magnetic field above a predetermined threshold is detected based on the magnetic field from the gaming machine, and includes a determination step in which, even if the magnetic field from the gaming machine is above the predetermined threshold, the method determines that fraud is not detected if it is determined from the change in the magnetic field that the change is due to a magnetic mechanism inside the gaming machine; a time measurement step in which, after the determination step in which fraud is not detected, the time during which the magnetic field from the gaming machine continues to be above the predetermined threshold is measured; and a result changing step in which the determination result is changed to fraud detection when the time measured in the time measurement step exceeds a predetermined time.

[0010] According to the above configuration, the time measurement unit or time measurement step measures the time during which a magnetic field exceeding a predetermined threshold continues to be detected from the gaming machine after it has been determined that the magnetic field is caused by the internal magnetic mechanism. Then, in the judgment unit or result modification step, if the measured time exceeds a predetermined time, the judgment result is changed to fraud detection. This makes it possible to correct the erroneous judgment and prevent fraudulent activity from continuing, even if the judgment unit or judgment step mistakenly determines that an illegal magnetic field is caused by the internal magnetic mechanism.

[0011] The system may also include a magnetic detection unit that detects a magnetic field and outputs it to the determination unit. The determination unit may acquire the magnetic field from the gaming machine at a predetermined period, and the time measurement unit may reset the measured value when the magnetic field acquired by the determination unit is below a predetermined threshold. Furthermore, the system may also include a notification unit that outputs the determination result from the determination unit to the outside.

[0012] Furthermore, each aspect of the present invention may be implemented by a computer. In this case, a program for the fraud detection device that enables the computer to implement the fraud detection device by operating the computer as each part (software element) of the fraud detection device, and a computer-readable recording medium on which the program is recorded, also fall within the scope of the present invention. [Effects of the Invention]

[0013] According to one aspect of the present invention, it is possible to suppress damage caused by illegal activities using illegal magnetic field sources. [Brief explanation of the drawing]

[0014] [Figure 1] This is a diagram showing an example of a gaming machine. [Figure 2] This is a block diagram showing the configuration of the main parts of the fraud detection device according to Embodiment 1. [Figure 3] This is a diagram showing the appearance of a fraud detection device. [Figure 4]This is an example showing the detection range of the fraud detection device. [Figure 5] This is a flowchart showing an operation example of the fraud detection device according to Embodiment 1. [Figure 6] This is a diagram showing an example of the change in the magnetic field and the operation of the fraud detection device. [Figure 7] This is a block diagram showing the configuration of the main part of the fraud detection system according to Embodiment 2.

Mode for Carrying Out the Invention

[0015] 〔Embodiment 1〕 Hereinafter, an embodiment according to one aspect of the present invention (hereinafter also referred to as "this embodiment") will be described based on the drawings. For convenience of explanation, the same or corresponding parts are denoted by the same reference numerals and the description thereof will not be repeated.

[0016] §1. Application Example (Configuration of the Gaming Machine 1) FIG. 1 is a diagram showing an example of the gaming machine 1. The gaming machine 1 ejects a game ball (not shown) from the ejection mechanism 3 when the player operates the handle 2. The game ball ejected from the ejection mechanism 3 moves in the movement space 7 between the game board 5 and the transparent plate 6 provided in front of the game board 5. The game board 5 is provided with guide members 8 such as nails, and the game ball is guided by the guide members 8. Further, the game board 5 is provided with large and small winning holes 4 and 9, and the player adjusts the rotation amount of the handle 2 so that the game ball enters a hole (not shown) that opens the winning holes 4 and 9, thereby adjusting the arrival position of the game ball ejected from the ejection mechanism 3.

[0017] The winning holes 4 and 9 are closed until they satisfy a predetermined condition, and when they satisfy the predetermined condition, the magnetic mechanism (magnetic mechanism unit) 10 using a solenoid or the like operates to open. The time when the winning holes 4 and 9 open, that is, the time when the magnetic mechanism 10 operates, is less than the predetermined limited time B.

[0018] In such a gaming machine 1, there is a case where an illegal person controls the movement of the game balls and guides them to the winning holes 4 and 9 by installing or approaching an illegal magnetic field generation source 20 such as a magnet on the transparent plate 6.

[0019] The fraud detection device 30 according to the present embodiment is provided in the gaming machine 1 in order to detect such illegal fraudulent acts. In the fraud detection device 30, when a magnetic field of a predetermined threshold value A or more is detected based on the magnetic field from the gaming machine, it is regarded as fraud detection. However, even when a magnetic field of a predetermined threshold value A or more is detected, if it is determined that it is due to the internal magnetic mechanism part of the gaming machine from the change of the magnetic field, it is determined as non-fraud detection.

[0020] Then, in the fraud detection device 30, after it is determined as non-fraud detection, the time during which the magnetic field from the gaming machine continues to be equal to or higher than the predetermined threshold value A is measured. When the measured time becomes equal to or longer than the predetermined time B (when the measured time becomes equal to or longer than the predetermined time B), the determination result is changed to fraud detection.

[0021] Thereby, even when a fraudulent act is erroneously determined to be due to the internal magnetic mechanism part, the false determination can be corrected to detect fraud again in a relatively short time. Thereby, it is possible to prevent the fraudulent act from continuing.

[0022] §2. Configuration example (Opening / closing mechanism of winning holes) The magnetic mechanism 10 is a mechanism for opening the large and small winning holes 4 and 9 that are closed by a solenoid or the like, and is provided in each of the large and small winning holes 4 and 9. The magnetic mechanism 10 operates when the gaming machine 1 satisfies a predetermined condition, and the winning hole 4 (9) opens. The magnetic mechanism 10 continues to operate for a predetermined operating time, and stops operating when the operating time elapses. Thereby, the opened winning hole 4 (9) closes. The predetermined operating time is less than the predetermined time B described later. Note that the end condition of the operation is not limited to only time, and may be a case where a predetermined number of game balls enter the winning hole 4 (9). Since it becomes possible to win by the operation of the magnetic mechanism 10, the time (period) during which the magnetic mechanism 10 operates is limited.

[0023] The fraud detection device 30 is a device installed in the gaming machine 1 that detects magnetic fields inside and outside the gaming machine to detect fraudulent activity. Details of the fraud detection device 30 will be described later.

[0024] (cheating) Illegal players may control the movement of the game balls by placing a magnetic field source 20, such as a magnet, on or near the transparent plate 6. These actions constitute illegal and fraudulent activity in the game of the gaming machine 1. The fraud detection device 30 detects such fraudulent activity.

[0025] (Fraud detection device 30) Figure 2 is a block diagram showing the configuration of the main parts of the fraud detection device 30 according to Embodiment 1. The fraud detection device 30 includes a magnetic field detection unit 31, a calculation unit 32, a timer 33, and a notification unit 34.

[0026] The magnetic field detection unit 31 is a sensor that detects magnetic fields. The magnetic field detection unit 31 outputs the detected magnetic field to the calculation unit 32.

[0027] Figure 3 shows the external appearance of the fraud detection device 30. Figure 4 is an example showing the detection range 35 of the fraud detection device 30.

[0028] As shown in Figure 3, the magnetic field detection unit 31 can detect magnetic fields in three axes (X-axis, Y-axis, and Z-axis). In reality, the value obtained by vector summing the values ​​of the three axes is the actual magnetic field.

[0029] As shown in Figure 4, when the fraud detection device 30 is viewed from the front (left side of Figure 4), the detection range 35 is spread in a roughly circular shape, and when the fraud detection device 30 is viewed from the side (right side of Figure 4), the detection range 35 is spread in a roughly oval shape.

[0030] Returning to Figure 2, the calculation unit 32 consists of an A / D converter, CPU, clock circuit, memory, etc. The calculation unit 32 performs calculations based on the magnetic field detected in the gaming machine and detects fraudulent activity. The calculation unit 32 detects fraud when a magnetic field above a predetermined threshold A is detected based on the magnetic field from the gaming machine. Furthermore, even if the magnetic field from the gaming machine is above the predetermined threshold A, the calculation unit 32 determines that the change in the magnetic field is due to the magnetic mechanism 10 inside the gaming machine and determines that no fraud has been detected. In other words, the calculation unit 32 functions as a determination unit.

[0031] The determination of whether the detected magnetic field is due to the magnetic mechanism 10 can be made, for example, based on the amount of magnetic change. The amount of magnetic change caused by the illegal operator installing or placing the magnetic field source 20 near the magnetic field source is small compared to the amount of magnetic change caused by the start of operation of the magnetic mechanism 10. Therefore, based on the amount of magnetic change, it is possible to determine whether the detected magnetic field source is the magnetic mechanism 10 or the magnetic field source 20.

[0032] In this embodiment, the calculation unit 32 acquires the magnetic field from the gaming machine at predetermined intervals. That is, based on the information input from the magnetic field detection unit 31, the calculation unit 32 determines whether or not there is any fraud at regular intervals, and if fraud is detected, outputs a fraud detection determination output to the notification unit 34. Details of the operation of the calculation unit 32 will be described later. Note that the calculation unit 32 uses the information from the timer 33 for processing.

[0033] Timer 33 is a timer controlled by the arithmetic unit 32. Timer 33 outputs the measured time to the arithmetic unit 32.

[0034] The calculation unit 32 controls the timer 33 to measure the time during which the magnetic field from the gaming machine remains above a predetermined threshold A after it has been determined that no fraud has been detected. In other words, the calculation unit 32 and the timer 33 constitute a time measurement unit. When the measurement time exceeds a predetermined time B, the calculation unit 32 changes the determination result to fraud detection. In this embodiment, the calculation unit 32 resets the measured value if the magnetic field acquired by the calculation unit is below the predetermined threshold A.

[0035] The notification unit 34 outputs the judgment result to the outside. In this embodiment, when the notification unit 34 receives a judgment output indicating fraud detection from the calculation unit 32, it notifies the outside that fraud has been detected.

[0036] Such fraud detection device 30 is installed on the back side of the game board 5, and is positioned so that a magnetic field source 20, which is installed or placed near the illegal player to guide the game balls into the winning holes 4 or 9, falls within the detection range 35. A magnetic mechanism 10 may also fall within the detection range 35.

[0037] §3. Example of Operation Figure 5 is a flowchart showing an example of the operation of the fraud detection device 30 according to Embodiment 1. In this embodiment, when the calculation unit 32 detects a magnetic field greater than or equal to a predetermined threshold A, it calculates the amount of magnetic change, and if it falls within a predetermined range C which is assumed to be the amount of magnetic change due to the start of operation of the magnetic mechanism 10 provided in the gaming machine 1, it executes a cancellation process that continues the previous judgment output. The cancellation process starts when the cancellation flag is turned on and ends when the cancellation flag is turned off.

[0038] Cancellation processing is a process in which, when the detection output shows a rising change, the amount of change in the detection output with respect to time is analyzed, and if it is identified as a detection output indicating a change in the magnetic field due to the start of operation of the magnetic mechanism 10, the judgment output is not updated and the current judgment is continued. The start of operation of the magnetic mechanism 10 means that the magnetic mechanism 10 has switched from a stopped state to an operating state.

[0039] The calculation unit 32 measures the time during which the detected magnetic field remains above a predetermined threshold A after it has been determined that the operation of the magnetic mechanism 10 has started. In other words, it measures the duration of the cancellation process. When the measurement time exceeds a predetermined time B, the calculation unit 32 changes the judgment output to "false detection". The predetermined time B is set to, for example, a time slightly longer (by a few seconds) than the maximum operating time of the magnetic mechanism 10 in one cycle.

[0040] As shown in Figure 5, the calculation unit 32 determines whether the detected magnetic field value detected by the magnetic field detection unit 31 is equal to or greater than a predetermined threshold A (S10). The predetermined threshold A is the amount of magnetic field at which the calculation unit 32 can determine that an illegal magnetic field source 20 has been installed or is located nearby. The predetermined threshold A can be set, for example, to a magnetic flux density of 0.3 mT (3000 mG).

[0041] If the calculation unit 32 finds that the detected magnetic field is less than a predetermined threshold A (No in S10), that is, if the detected magnetic field is small, it proceeds to S20, goes through S21, and determines that no fraud is detected (S22). After that, it returns to S10. In S20, the calculation unit 32 turns off the cancel flag, and in S21 it resets the timer 33 (S21). If the cancellation process is being executed, the cancellation process ends in S20 and the timer 33 is reset in S21.

[0042] On the other hand, the calculation unit 32 calculates the amount of change in the magnetic field (S11) when it detects a magnetic field greater than or equal to a predetermined threshold A (Yes in S10), that is, when it detects a large magnetic field that can be expected to be caused by the approaching magnetic field source 20. The amount of change in the magnetic field is the difference from the previously detected magnetic field value.

[0043] The calculation unit 32 determines whether the amount of change in the magnetic field is within a predetermined range C (S12). The predetermined range C is the range within which it can be assumed that the change in the magnetic field is due to an illegal magnetic field source 20. The predetermined range C can be set to a range greater than 0.05 mT (500 mG) and less than 0.2 mT (2000 mG), for example. If it is within the predetermined range C (Yes in S12), that is, if the magnetic field detection unit 31 detects a slow change in the magnetic field, the process proceeds to S19.

[0044] In S19, the calculation unit 32 turns off the cancel flag and proceeds to S18, determining that fraud has been detected. As a result, if the calculation unit 32 is performing a cancellation process, it terminates the cancellation process and returns to S10.

[0045] If the amount of change in the magnetic field is outside the predetermined range C (No in S12), the calculation unit 32 turns on the cancellation flag (S13: determination step). The predetermined range C is outside the range if the change in the magnetic field is due to the magnetic mechanism 10, or if it is a rapidly changing change that can be assumed, or if it has hardly changed from the previously detected value of the magnetic field. When the cancellation flag is turned on, the cancellation process is executed, and the calculation unit 32 determines whether the timer 33 has been started (S14).

[0046] If timer 33 is already started (Yes in S14), the calculation unit 32 proceeds to S16. If timer 33 is not already started (No in S14), the calculation unit 32 starts timer 33, begins counting up, and then proceeds to S16 (time measurement step). If a cancellation process has already been executed, timer 33 is already started, and if a cancellation process is newly initiated, timer 33 is not started. In other words, timer 33 is started when the cancellation flag switches from off to on and the cancellation process begins.

[0047] In S16, the calculation unit 32 determines whether the elapsed time (count time) of the timer 33 is equal to or greater than a predetermined time B. The predetermined time B is set to a time at which it can be determined that a false detection has occurred, based on the maximum operating time of the magnetic mechanism 10 in one cycle. The predetermined time B is set to, for example, 30 seconds. If the elapsed time of the timer 33 is equal to or greater than the predetermined time B (Yes in S16), the calculation unit 32 proceeds to S18 (result change step).

[0048] If the elapsed time of timer 33 is less than the predetermined time B (No in S16), the calculation unit 32 determines whether the previous judgment result was a fraud detection or not (S17). If the previous result was no detection (No in S17), the calculation unit 32 proceeds to S22, and if the previous result was a fraud detection (Yes in S17), the calculation unit 32 proceeds to S18. In other words, although the amount of change in the magnetic field is within the range considered to be due to the magnetic mechanism 10, the time considered to be due to the magnetic mechanism 10 exceeds the predetermined time B, so a fraud detection is forcibly determined.

[0049] In the flow chart of Figure 5, if the cancel flag is off, the current judgment result is output as is. If the cancel flag is on and the timer 33 is less than the predetermined time B, the previous judgment result is output. If the timer 33 is equal to or greater than the predetermined time B, the current judgment result is forcibly marked as fraudulent. In other words, even if the magnetic field change was sufficiently steep because the amount of magnetic field change was outside the predetermined range C, if that state is maintained for a long time, the calculation unit 32 will determine that fraudulent activity has occurred by the player.

[0050] The predetermined threshold A in S10, the predetermined range C in S12, and the predetermined time B in S16 are arbitrary values ​​determined according to the type of gaming machine and are not particularly limited. For example, the predetermined threshold A is determined by the magnitude of the magnetic field produced by the solenoid used in the magnetic mechanism 10. The predetermined range C is determined according to the responsiveness of the solenoid used in the magnetic mechanism 10. The predetermined time B is a value greater than the maximum operating time of the magnetic mechanism 10.

[0051] (Change in magnetic field) Figure 6 shows an example of the operation of the fraud detection device 30 in relation to changes in the magnetic field. Reference numeral 201 is a graph showing the time change of the detected value of the magnetic field. Reference numeral 202 is a graph showing the change in the amount of change of the magnetic field for each sampling period. Reference numeral 203 is a timing chart showing the time change of the judgment result. In reference numerals 201 to 203, the solid lines show the magnetic quantity, magnetic change amount, and judgment output due to fraudulent activities that are mistakenly judged as being caused by the magnetic mechanism 10. The dashed lines show the magnetic quantity, magnetic change amount, and judgment output due to fraudulent activities that can be detected by conventional technology.

[0052] As shown in reference numerals 201 and 202, when the detected value shows a steep rise and the amount of change in the magnetic field falls outside the predetermined range C, the calculation unit 32 determines that it is due to the magnetic mechanism 10, and the determination result is not detected (normal).

[0053] However, after a predetermined time B has elapsed, the calculation unit 32 revises its judgment to determine that fraudulent activity is occurring because a large magnetic field has been detected for a long period of time, and changes the judgment result to fraud detection.

[0054] §4. Action and Effects With the above configuration, even if an illegal operator is engaging in fraudulent activity, the calculation unit 32 can forcibly determine that fraudulent activity is occurring when the timer 33 reaches a predetermined time B or longer. Therefore, it is possible to prevent disadvantages to the gaming facility.

[0055] Furthermore, by not directly notifying the player with the output value of the magnetic field detection unit 31, but by inserting processing by the calculation unit 32, the notification unit 34 can detect only appropriate fraudulent activities. This prevents the system from mistakenly detecting magnetic changes caused by the magnetic mechanism 10 as fraudulent activity, thereby preventing it from giving the player an unfair impression.

[0056] Furthermore, by providing a gaming machine 1 equipped with a fraud detection device 30, the psychological barrier to players engaging in fraudulent activities can be increased.

[0057] [Embodiment 2] Other embodiments of the present invention are described below. For the sake of clarity, components having the same function as those described in the above embodiments will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0058] Figure 7 is a block diagram showing the configuration of the main parts of the fraud detection system 30a according to Embodiment 2. The fraud detection system 30a consists of a fraud detection device 30b and a magnetic field sensor 30c. The magnetic field sensor 30c includes a magnetic field detection unit 31 and a detection output unit 36. The fraud detection device 30b includes a calculation unit 32, a timer 33 and a notification unit 34.

[0059] The detection output unit 36 ​​outputs the detected magnetic field value detected by the magnetic field detection unit 31 to the calculation unit 32 of the fraud detection device 30b.

[0060] In other words, in Embodiment 1, the fraud detection process, which was previously completed by a single fraud detection device 30, is divided and processed by the magnetic field sensor 30c and the fraud detection device 30b.

[0061] [Examples of implementation using software] The functions of the fraud detection devices 30 and 30b (hereinafter referred to as "devices") are programs that cause a computer to function as the device, and these can be realized by programs that cause a computer to function as each control block (particularly the arithmetic unit 32) of the device.

[0062] In this case, the device includes a computer having at least one control device (e.g., a processor) and at least one storage device (e.g., memory) as hardware for executing the program. By executing the program using this control device and storage device, the functions described in each of the embodiments are realized.

[0063] The above program may be recorded on one or more computer-readable recording media, not temporary ones. These recording media may or may not be provided by the above device. In the latter case, the program may be supplied to the above device via any wired or wireless transmission medium.

[0064] Furthermore, some or all of the functions of each of the above control blocks can also be realized by logic circuits. For example, an integrated circuit in which logic circuits functioning as each of the above control blocks are formed is also included in the scope of the present invention. In addition, it is also possible to realize the functions of each of the above control blocks by, for example, a quantum computer.

[0065] Furthermore, each process described in the above embodiments may be performed by AI (Artificial Intelligence). In this case, the AI ​​may operate on the control device described above, or it may operate on other devices (for example, an edge computer or a cloud server).

[0066] [Additional Notes] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0067] 1. Gaming machine 10 Magnetic mechanism (magnetic mechanism section) 20 Magnetic field sources 30, 30b Fraud detection device 31 Magnetic field detection unit 32. Calculation Unit (Determination Unit, Time Measurement Unit) 33 Timer (time measurement unit) 34 Hochi Department

Claims

1. An anti-fraud device installed in a gaming machine, which detects fraud when a magnetic field exceeding a predetermined threshold is detected based on the magnetic field from the gaming machine, A determination unit acquires the magnetic field from the gaming machine at predetermined intervals, and even if the acquired magnetic field from the gaming machine is above a predetermined threshold, if the amount of change in the magnetic field, which is the difference from the previously detected magnetic field value, is outside a predetermined range, it determines that the issue is due to the magnetic mechanism inside the gaming machine and that no fraud is detected. The system includes a time measurement unit that measures the time during which the magnetic field from the gaming machine remains above a predetermined threshold, starting from the point in time when the determination unit determines that no fraud has been detected due to the magnetic mechanism. The determination unit is a fraud detection device that, when the time measured by the time measurement unit exceeds a predetermined time, changes the determination result, which was previously considered as not fraud detected by the magnetic mechanism unit, to fraud detected.

2. The fraud detection device according to claim 1, further comprising a magnetic detection unit that detects a magnetic field and outputs it to the determination unit.

3. The fraud detection device according to claim 1 or 2, wherein even if the time measured by the time measurement unit has not yet exceeded a predetermined time, if the previous determination result was fraud detection, the determination unit changes the determination result, which was determined to be non-fraud detection by the magnetic mechanism unit, to fraud detection.

4. The fraud detection device according to claim 1 or 2, wherein the time measurement unit resets the measured value when the magnetic field acquired by the determination unit is less than the predetermined threshold.

5. The fraud detection device according to claim 1 or 2, further comprising a notification unit that outputs the determination result from the determination unit to the outside.

6. A fraud detection method installed in a gaming machine, which detects fraud when a magnetic field exceeding a predetermined threshold is detected based on the magnetic field from the gaming machine, The magnetic field from the gaming machine is acquired at predetermined intervals. Even if the acquired magnetic field from the gaming machine is above a predetermined threshold, if the amount of change in the magnetic field, which is the difference from the previously detected magnetic field value, is outside a predetermined range, the determination step is made that the issue is due to the magnetic mechanism inside the gaming machine and that no fraud is detected. From the point in the determination step where it is determined that no fraud is detected due to the magnetic mechanism, a time measurement step is taken to measure the time during which the magnetic field from the gaming machine continues to be above a predetermined threshold, A fraud detection method including a result modification step, in which, if the measurement time in the time measurement step exceeds a predetermined time, the determination result of not detecting fraud due to the magnetic mechanism is changed to detecting fraud.

7. A fraud detection program for causing a computer to function as a fraud detection device according to claim 1, wherein the computer functions as the determination unit and the time measurement unit.

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