JPH0768011A - Metallic body detector - Google Patents

Abstract

PURPOSE:To reduce an electromagnetic effect leaking from a transmitting section used for a metallic body detector to he outside thereof. CONSTITUTION:A metallic detector has a matrix sensor 20 having a wide planer extent of a detecting region and functioning as a metallic body sensor and a signal processor 170 including a transmission/reception board 171 and control board 172 for driving the matrix sensor 20 and detecting the presence and position of a metallic body. Further, the transmission/reception board includes a transmission resistance delivering board 180 for reducing an electromagnetic effect on the outside. Thus, since the electromagnetic effect leaking to the outside can be reduced in a transmission section of the matrix sensor, mutual interference is not generated even if the matrix sensor 20 and signal processor 170 are provided close to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal body detecting device using a matrix sensor composed of a plurality of transmission lines and a plurality of reception lines, and more particularly, to an external electromagnetic effect generated in the transmission lines. The present invention relates to a small number of metal body detection devices.

[0002]

2. Description of the Related Art It is sometimes necessary to detect a position where a metal body exists in a predetermined area, particularly a planar area. For example, the movement locus of a metal body moving in a plane area may be detected. Further, when a metal body is distributed in a certain area, the distribution pattern may be detected. As an example of the former, specifically, detecting the movement trajectory of the game execution medium in the game machine can be mentioned.

There is a game machine in which a metal body, for example, a metal ball is moved within a specific space set in the game machine, and the presence or absence of a prize is determined according to the movement destination. As a typical example, for example, "pachinko ball"
There is a pachinko game machine that plays by dropping and moving a metallic ball called a metal ball in a space surrounded by parallel planes with many obstacles.

In general, a pachinko game machine is composed of a board surface (base board) forming a space for moving a pachinko ball, a glass plate covering the board surface at a constant interval, and a pachinko ball composed of the board surface and the glass plate. And a projection mechanism for projecting into the partitioned space. Pachinko game machine,
The board surface is installed so that it is substantially parallel to the vertical direction. On the board, a plurality of winning holes, which are awarded when the pachinko balls enter the board and are ejected from the board, and the pachinko balls that have not entered the winning holes are finally collected and ejected from the board. A discharge hole is provided.

In addition, a large number of pins (nails) have a length corresponding to the diameter of the pachinko ball so that the pachinko ball falling along the plate surface frequently collides with the board surface and causes fluctuations in the movement direction. It is provided substantially vertically while protruding from the board surface. These pins guide the colliding pachinko ball toward the winning hole in some cases, and in some cases, to move it away from the winning hole, while giving fluctuations in the direction of its movement. As described above, the distribution is determined and arranged on the board.

By the way, in a pachinko parlor in which a large number of such pachinko game machines are arranged, it is necessary to manage the winning situation in each pachinko game machine. That is,
This is because it is necessary to find a machine with an uneven trajectory of a pachinko ball or a machine with an abnormal trajectory, and perform replacement or repair. For example, if a machine that is unusually easy to win is left unattended, management damage to the pachinko parlor becomes great, so it is necessary to find such a machine. Also,
On the other hand, if there is a machine that is harder to win, the parlor will be disliked by the customer, so it is necessary to find such a machine. Also, it is necessary to detect an illegal act such as guiding a pachinko ball with a magnet or the like during the execution of the game.

Conventionally, as a metal body detecting device for such a purpose, there is one disclosed in Japanese Patent Application Laid-Open No. 2-279186.

[0008] This publication discloses a pachinko ball detection device. This detection device includes a transmission coil row group in which a plurality of transmission coil rows having continuous open ring transmission units are arranged in one direction, and a reception coil row having continuous open ring reception units inductively coupled to the transmission units. Has a metal sensor called a detection matrix composed of a group of receiving coils arranged in a direction intersecting with the group of transmitting coil rows. Then, connect this metal sensor to the management device,
By driving by this, it is detected whether or not the metal body is present in each portion where the transmission unit and the reception unit are superposed.

This metal sensor is attached to a glass plate that covers the board surface of the pachinko game machine, so that the position of the pachinko ball on the board surface of the pachinko game machine can be detected.

By the way, in this metal sensor, in order to improve the detection accuracy, it is necessary to provide a large number of transmitting coil rows and receiving coil rows. However, these have a complicated structure because they form an open ring-shaped coil,
The wiring density cannot be increased.

On the other hand, the applicant of the present invention has filed a patent application in Japan (Japanese Patent Application No. 2-244898, Japanese Patent Application Laid-Open No. 4-1).
In the specification of Japanese Laid-Open Patent Publication No. 22375), it is proposed that a sensor is configured by using a transmission line and a reception line instead of the coil array. That is, a plurality of parallel folded-back transmission lines are attached to one surface of the substrate, and a plurality of parallel folded-back reception lines are crossed with each other so as to be electromagnetically coupled to the transmission lines, and are opposite to the substrate. A sensing matrix is shown that is configured to be mounted on a surface. This detection matrix connects the transmission line and the reception line corresponding to the transmission circuit and the reception circuit of the management device, sequentially applies a signal current to each transmission line, and induces an induction current induced by the signal current for each reception line. By detecting the presence or absence of a metal body from the induced current received by the receiving circuit, knowing the combination of the transmission line carrying the signal current and the receiving line receiving the induced current, the metal The position of the body can be detected.

[0012]

However, in this conventional metal body detecting device, when a signal is passed through the transmission coil or the transmission line, the reception coil or the reception line only receives the signal. Instead, it may have an electromagnetic effect on the outside. In particular, when a metal body detection device is used in a pachinko game machine in a pachinko parlor installed adjacent to or opposite to each other, mutual interference may occur due to the influence of the transmission line of the adjacent metal body detection device.

The pachinko game machine 10 is usually a pachinko parlor, as shown in FIG.
In order that 0 can be easily used, the back surfaces are faced to each other, forming two rows, and a plurality of them are arranged adjacent to each other. Further, in the parlor, there are provided a group of pachinko game machines 10 arranged in this way, forming a so-called island shape. Here, FIG. 10 shows the distance between the pachinko game machines 10 facing each other and the general size of the interval between the adjacent game machines 10.

In the pachinko parlor, in order to increase the profit by arranging as many game machines as possible in the pachinko parlor, and to make the space available to the user as wide as possible and not to give the user a feeling of oppression. The game console 10
It is desirable to make the distance between them as small as possible. However, the smaller the distance between the pachinko game machines 10 is, the greater the influence from the game machines 10 that are adjacent to each other becomes, and the position determination accuracy is degraded.

It is an object of the present invention to provide a metal body detection device which has a small electromagnetic effect leaking from the transmitter used in the metal body detection device to the outside of the device.

[0016]

The above object is provided with a matrix sensor having a detection area having a planar spread, and a signal processing system for driving the matrix sensor to detect the presence and the position of a metal body, The matrix sensor has a transmission line group composed of a plurality of lines arranged in parallel, a reception line group composed of a plurality of lines arranged in parallel, and a substrate supporting the lines, and the transmission line group and the reception line group. In the metal body detection device, which is disposed on the substrate such that the groups intersect each other and the intersections are arranged in a matrix, the signal processing system sequentially scans each line of the transmission line group. A transmission circuit that sends a signal current to them, a reception circuit that sequentially scans each line of the reception line group and sequentially receives those reception signals, and a transmission line group and a reception line for the transmission circuit and the reception circuit, respectively. Flock The control circuit outputs a control signal for conducting the inspection, determines the presence or absence of metal from the signal received by the receiving circuit, and outputs the information indicating the transmitting line scanning position of the transmitting circuit and the information indicating the receiving line scanning position of the receiving circuit. And a signal processing device for detecting the position where the metal body is detected, and the transmission circuit transmits a signal current to a predetermined specific transmission line in the transmission line group to a signal to another transmission line. It can be achieved by a metal body detection device characterized by being limited below the current.

[0017]

The present invention comprises a matrix sensor having a transmission line group and a reception line group, and a signal processing system for driving the matrix sensor to detect the presence and the position of a metal body.

The transmission circuit and the reception circuit of the signal processing system scan the transmission line group and the reception line group, respectively. The transmission circuit sends a signal current to the transmission line group, and the reception circuit receives a reception signal from the reception line group.

Further, the signal processing device of the signal processing system outputs a control signal for causing the transmission circuit and the reception circuit to scan the transmission line group and the reception line group, respectively, and receives the signal in the reception circuit. From the above, the presence or absence of metal is determined, and the position where the metal body is detected is detected based on the information indicating the transmission line scanning position of the transmitting circuit and the information indicating the receiving line scanning position of the receiving circuit.

The transmission circuit further limits the signal current sent to a predetermined transmission line in the transmission line group to be lower than the signal currents to other transmission lines. Here, as the transmission line that limits the transmission current to a low level, the transmission line that most leaks the electromagnetic effect is selected.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Prior to the description of the embodiment, a pachinko game machine to which the embodiment of the present invention is applied will be described with reference to FIG.

In the pachinko game machine shown in FIG. 3, a board surface 11 which constitutes a space for moving the pachinko ball, a surface glass body 16 which covers the pachinko ball at a constant interval, a pachinko ball, and the board surface 11 and the glass body. And a projection mechanism for projecting into a space partitioned by 16. The pachinko game machine is installed such that the board surface 11 thereof is substantially parallel to the vertical direction.

A guide rail 12 is provided on the board surface 11. The board surface 11 has a game area 12a defined by an inner area surrounded by the guide rails 12. The guide rail 12 guides the pachinko ball hit by the projection mechanism along the guide rail 12 and sends the pachinko ball to the vertically upper position (upstream portion) of the game area 12a.

In the game area 12a, a plurality of winning holes 14a are provided, in which a pachinko ball enters there and is ejected from the board 11, and a special hole is provided in the center of the board between upstream and downstream. The winning prize device device 14b for realizing the winning state and the pachinko balls that have not entered the winning holes 14a are finally collected and ejected from the board surface 1
Two discharge holes 15 are provided. Prize winning device 14
b is a device that gives out a large number of pachinko balls as a prize when the state of the pachinko balls changes each time they enter a specific winning hole 14a and a certain condition is satisfied. For example, by arranging a rotating drum like a slot machine, rotating the drum for each winning, and when a predetermined pattern is aligned, it becomes a special winning state and is configured to give out a large number of pachinko balls. There is.

A large number of pins (nails) 13 are provided in the game area 12a of the board 11 so that the pachinko balls B falling along the board 11 frequently collide with each other to cause fluctuations in the movement direction. Has been. As shown in FIG. 4, these pins 13 are substantially vertically driven into the board surface 11 in a state of protruding from the board surface 11 by a length corresponding to the diameter of the pachinko ball B. These pins 13 are distributed and arranged on the board 11 for the purpose as described above.

On the front surface of the pachinko game machine 10,
A launching handle 33 for launching a pachinko ball
And a tray 34 for receiving the pachinko balls paid out as a prize. The handle 33 constitutes a part of the projection mechanism.

As shown in FIG. 4, the front glass covering the board surface 11 is along the board surface 11 of the pachinko game machine 10 and has a double structure of a surface glass body 16 and an inner glass body 17. . In addition, the inner glass body 17 includes the glass substrate 17a and the surface glass 1 adhered to both surfaces thereof.
7b and 17c.

The pachinko game machine 10 having the above-described structure is normally used in the pachinko parlor shown in FIG.
It is arranged as shown in. Pachinko game machine 10
In order to facilitate the use by the user 1000, the two are arranged in two rows with the back sides facing each other, and are arranged adjacent to each other. Furthermore, in the parlor, arranged in this way,
There are several groups of pachinko game machines 10 that form a so-called island shape. Here, in FIG. 12, the distance between the pachinko game machines 10 facing each other and the general size of the interval between the adjacent game machines 10 are shown.

Next, an embodiment of the metal body detecting device of the present invention will be described with reference to the drawings.

As shown in FIG. 6, the metal body detecting apparatus of the present embodiment has a matrix sensor 20 having a detection area having a planar spread and functioning as a metal sensor, and the matrix sensor 20 is driven to drive the metal body. Signal processing system (signal processing device) that detects the presence of the body and the position of the body
170 and. Here, the signal processing system 17
0 includes a transmission resistance distribution board 180 for reducing external electromagnetic effects, which is a feature of the present invention.

As shown in FIG. 5, the matrix sensor 20 has a plurality of transmission lines 22, a plurality of reception lines 26, and a substrate that supports these. The transmission line 22 is a pair of conducting wires 62 that form a forward path 62a and a return path 62b that are parallel to each other.
Composed of. The reception line 26 is also composed of a pair of conductors 62. In the present embodiment, the conductive wire 62 is, for example,
It consists of a wire made of copper wire that is insulation-coated with polyurethane. The pair of conducting wires 62 are configured such that the forward path and the returning path are connected at one end side, and the other end side serves as a signal input / output end.

The transmission line 22 and the reception line 26 are arranged so as to intersect with each other. Specifically, for example, the transmission lines 22 are arranged at regular intervals along the row direction, and the reception lines 26 are arranged at regular intervals along the column direction. The transmission line 22 and the reception line 26 are arranged in this way,
The intersections of the transmission lines 22 and the reception lines 26, which are the detection areas, are arranged in a matrix. Note that the arrangement in the row direction and the column direction is arbitrary, and either row may be arranged.

As shown in FIG. 6, the signal processing system 170 controls the transmission / reception board 171 functioning as a transmission / reception means for driving the matrix sensor 20, and the transmission / reception board 171 to detect a detection signal. It has a control board 172 which functions as a signal processing means for receiving and determining the presence or absence of a metal body based on the received signal and for detecting the position where the metal body is detected.

As will be described later, the transmission / reception board 171 transmits a transmission circuit 40 that sequentially scans designated lines of the transmission lines 22 and sends a transmission signal, and a transmission current of each line. A transmission resistance distribution board 180 (see FIG. 7) for limiting, and a reception circuit 50 (see FIG. 9) that sequentially scans designated lines among the reception lines 26 and sequentially receives the reception signals of the reception lines. Have. The control board 172 is different from the transmission / reception board 171 in that
Specify the transmission line and the reception line to be scanned, and
The presence or absence of metal is determined from the signal received by the receiving circuit 50, and the position where metal is detected is determined based on the information indicating the transmitting line scanning position in the transmitting circuit 40 and the information indicating the receiving line scanning position in the receiving circuit 50. To detect.

The transmission resistance distribution board 180 has 32 resistors 1801 to 1832 corresponding to each transmission line and individually limiting each transmission current. In this embodiment, the resistance value of each resistor is: resistor 1801 (corresponding to transmission output 1): 91Ω resistor 1802 (corresponding to transmission output 2): 39Ω resistor 1803 (corresponding to transmission output 3) to resistor 1831 ( It corresponds to the transmission output 31): 2.4Ω Resistor 1832 (corresponding to the transmission output 32): 51Ω. Here, as for each transmission output, as shown in FIG. 5, the transmission output 1 is connected to the transmission line 1 arranged at the top of the matrix sensor 20, and the transmission output 32 is arranged at the bottom of the matrix sensor 20. It is connected to each transmission line so as to be connected to the arranged transmission line 32.

Further, the control board 172 can obtain the movement trajectory of the pachinko ball by temporally accumulating the information indicating the existing position of the pachinko ball. Then, it is possible to know the characteristics of the pachinko game machine from the movement locus, and it is possible to detect an abnormal locus and determine whether a fraudulent act has been performed.

Next, the matrix sensor will be described in more detail.

As shown in FIG. 4, the matrix sensor 20 is formed in a planar shape inside the two glass bodies covering the board surface 11, that is, inside the inner glass body 17 on the board surface side, and therefore It is provided between the surface glass body 16 and the board 11.

As shown in FIG. 5, the matrix sensor 20
In, a plurality of transmission lines 22 are arranged in parallel in one direction and attached to one surface (surface on the front surface side) of the glass substrate 17a of the inner glass body 17. Each transmission line 22 is
The glass substrate 17a is arranged on the glass substrate 17a so as to have a U-shaped parallel folded-back shape.
Similarly, the plurality of reception lines 26 are also arranged in parallel in one direction and arranged on the opposite surface (surface on the board surface 11 side) of the glass substrate 17a of the inner glass body 17 and attached. Each of the reception lines 26 makes a U-turn at the end of the glass substrate 17a so as to have a parallel folded shape.
Is located in. Then, the transmission terminal portion 23 and the reception terminal portion 27, which function as the connecting portions of the transmission line 22 and the reception line 26, are concentrated on the lower end of the inner glass body 17 in a vertical relationship when attached to the pachinko game machine. It is arranged.

Each reception line 26 is perpendicular to the plane parallel position with respect to each transmission line 22 so as to be electromagnetically coupled to each transmission line 22, that is, in such a positional relationship that the magnetic flux from the transmission line 22 is linked. Are arranged in the crossing direction. Inner glass body 17
Each of the transmission lines 22 and each of the reception lines 26 using the substrate as a substrate form a planar matrix sensor 20.

As shown in FIG. 5, each transmission line 22 intersects.
Each square-shaped surrounding portion (detection position) surrounded by and each reception line 26 is a detection unit 20a, 2 for detecting a metal body.
0a ... In the present embodiment, the detection units 20a, 20a ... Are set to a size capable of detecting a pachinko ball.

The inner glass body 17 has, for example, a vertical length a.
Is a glass substrate having a square shape with a size of 367 mm ± 10 mm and a lateral length b of 367 mm ± 10 mm, and 3.0
It has a thickness of ~ 3.5 mm. Surface glass 17b, 1
7c has a shorter vertical length than the glass substrate 17a, and the lower end of the glass substrate 17a is exposed.

In the inner glass body 17, the transmission line 22 is placed on one surface of the glass substrate 17a by a transparent adhesive layer, and the surface glass 17c is attached by a transparent adhesive layer so as to cover it. . Also, the inner glass body 1
7, the reception line 26 is attached to the other surface of the glass substrate 17a by a transparent adhesive layer, and the surface glass 17b is attached by a transparent adhesive layer so as to cover it.

As shown in FIG. 5, this glass substrate 17a
On one surface, a folded board 19a is provided at the left end, and an L-shaped transmission side routing board 19b is provided at the right end. Further, the other surface is provided with a folding board 29a at its upper end and a routing board 29b at its lower end.

As shown in FIG. 5, the transmission line 22 is composed of folded portions 61 formed on the folded substrate 19a and wires 62a and 62b connected to these folded portions 61 by soldering. The input / output end of the transmission line 22 is connected to the transmission terminal portion 23 via the lead wiring.

On the other hand, the reception line 26, as shown in FIG. 5, is composed of the folded portions 61 formed on the folded substrate 29a and the wires 62a and 62b connected to the folded portions 61 by soldering. The lower end portion thereof is connected to the reception terminal portion 27 by the respective routing portions 64 formed on the routing substrate 29b bonded to the lower end of the other surface of the glass substrate 17a.

In order to make the wires 62a and 62b inconspicuous to the player, the surface of each of the wires 62a and 62b is black with a matte treatment, and is designed to prevent light reflection.

The pattern of the matrix sensor 20 suitable for the ordinary pachinko game machine 10 has three transmission lines 22.
There are two rows, the reception lines 26 are 32 columns, and the number of the detection units 20a is a total of 1024 patterns.
The case where the reception line 26 has two rows and 32 columns is illustrated. In addition, in FIG. 5, the pattern other than the outer side is omitted.

The thickness of the wires forming the transmission line 22 and the reception line 26 is preferably set to a value of 25 μm to 30 μm. In the case of this embodiment, as shown in FIG.
The total widths c and d of 3 and the reception terminal portion 27 are 126 mm, respectively, and the widths e and f of the longitudinally extending portions of the transmission-side folded board 19a and the transmission-side transmission-side routing board 19b are respectively It is formed to 10 mm or less. The width of each of the transmission terminal portion 23 and the reception terminal portion 27 is 1.5 mm.

Further, the matrix sensor 20 is provided with a connector mounting plate 66 at the lower end of the glass substrate 17a. The connector mounting plate 66 is integrally fixed to the inner glass body 17 with the lower end of the glass substrate 17a sandwiched from both sides. The connector mounting plate 66 is made of plastic or stainless steel, extends downward along the width of the inner glass body 17, and is on the extension surface of the inner glass body 17 of the matrix sensor 20.

A transmitting connector 67a and a receiving connector 67b are fixed to the connector mounting plate 66 at positions corresponding to the transmitting terminal portion 23 and the receiving terminal portion 27, and the above-mentioned transmitting terminal portion is provided through these connectors. 23 and each terminal of the reception terminal unit 27 are connected to the corresponding transmission circuit 40 and reception circuit 50.

The connector mounting plate 66 is thickest at the position where the transmitting connector 67a and the receiving connector 67b are provided. On the other hand, the transmission connector 67a and the reception connector 67b are low-profile type, and the connector mounting plate 66
The thickness of the thickest part is equal to or slightly thinner than the inner glass body 17 of the matrix sensor 20.

Then, on the connector mounting plate 66, a transmission / reception board 171 (see FIG. 6) connected to the transmission connector 67a and the reception connector 67b is arranged.
The transmission / reception board 171 is a transmission circuit 40 that transmits to the plurality of transmission lines 22 of the matrix sensor 20 (see FIG. 7).
And a receiving circuit 50 (FIG. 9) for receiving from a plurality of receiving lines 26.
Reference), and the transmission connector 67a and the reception connector 67.
b, and a joint connector (not shown) connected to each of them.

Here, the joint connector is the transmission connector 6
7a and the receiving connector 67b are connected to connect the transmitting terminal portion 23 to the transmitting circuit 40 and the receiving terminal portion 27 to the receiving circuit 50.

Next, a signal processing system for performing signal processing of the matrix sensor 20 will be described.

As shown in FIG. 6, the matrix sensor 20
Are under the control of a control board 172, which is arranged apart from the matrix sensor 20 via a transmission / reception board 171. The control board 172 has the information processing device 30 (shown in FIG. 10). The control board 172 can communicate with other systems via a communication line 179. Also, control board 17
2 has an interface unit 176 for the information processing device 30 to read the monitoring points from the card 173. Although neither of the information processing devices 30 is illustrated,
It has at least a central processing unit (CPU) and a memory for storing its programs and data.

The card 173 has an interface section 17
6 is a removable memory card. The card 173 shows the pachinko ball monitoring points such as the winning holes 14a provided in the board surface 11 of the pachinko game machine 10, the detection position of the pachinko ball projected in the game area, the position of the discharge hole 15 and the like. Data and winning holes 14a, 14a ...
At least a pachinko ball detection algorithm that enters the discharge hole 15 is recorded as monitoring data. In the present embodiment, the card 173 has scan designation information (scan information) that designates a transmission line and a reception line to be scanned.
Is further memorized.

A RAM, a mask ROM, an EPROM, a one-shot ROM, or the like can be used as the memory mounted on the card.

The storage device 174 connected to the control board 172 is a board surface 11 of the pachinko game machine 10.
This is a device for recording the trajectory of a pachinko ball moving around between the inside and the inner glass body 17. This storage device 174 is
For example, it can be configured by a hard disk type storage device.
The data recorded in the storage device 174 is applied to a computer 175 in which software for analyzing the trajectory of a pachinko ball is incorporated and subjected to arithmetic processing to obtain necessary data at a pachinko game hall. The storage device 174 may be configured to store all or part of the data indicating the monitoring points, the pachinko ball detection algorithm, and the scan designation information described above.

The transmission circuit 40 is a circuit for sequentially transmitting a signal of a predetermined frequency to each transmission line 22. The receiving circuit 50 is a circuit that sequentially receives signals from the respective receiving lines 26 in synchronization with the transmitting circuit 40. The voltage waveform to the transmission line 22 by the transmission circuit 40 has a frequency of 1 to 1.3 MHz.
A continuous sine wave centered at 0 V is preferable.

As shown in FIG. 7, the transmission circuit 40 includes a transmission connector 41 and an amplifier 4 connected to the transmission connector 41.
2 and a transmission line switching circuit 43 that sequentially switches the transmission line to which the signal current is to be transmitted each time a transmission line switching pulse is input.
a and a totem pole driver 45 of 32 circuits connected to one end side of the transmission line 22 of the 32 circuits via the transmission connector 67a. The transmission line switching circuit 43a is connected to the channel switching logic 43, the amplifier 42 and the channel switching logic 43, and performs switching to connect the amplifier 42 to the totem pole driver 45 of the designated transmission line 22. Have and. The totem pole driver 45 is configured by connecting an NPN transistor and a PNP transistor to each other with their emitters and bases connected to each other.

The output of each totem pole driver 45 in the transmission circuit 40 having the above configuration is
It is connected to the input of the resistors (resistors 1801 to 1832) corresponding to each of the transmission resistor distribution boards 180.

As shown in FIG. 8, the channel switching logic 43 has a counter IC 43a and operates with two control lines for clock and reset. Specifically, each time a transmission line switching pulse signal output from the transmission line switching pulse generation circuit 204 of the sequence control circuit 47 described later is input, the connection state of the analog multiplexer 44 is connected to the designated transmission line. As described above, they are sequentially switched.

As shown in FIG. 9, the receiving circuit 50 includes 32 CTs (current transformers) 51 and CT5s each connected to the receiving line 26 of the 32 circuits via a receiving connector 67b.
1, a receiving line switching circuit 54a that sequentially switches the receiving line to be detected each time a receiving line switching pulse signal is input, an amplifier 53 connected to the receiving line switching circuit 54a, an amplifier 53, and a receiving line. It has a receiving connector 55 connected to the line switching circuit 54a. The reception line switching circuit 54 a has an analog multiplexer 52 and a channel switching logic 54 connected to the analog multiplexer 52. Therefore, the receiving circuit 50 is
A signal is received from each reception line 26 via the.

The CT 51 insulates each reception line 26 from the analog multiplexer 52, and converts the signal from each reception line 26 into a signal having a magnitude 10 times larger. The analog multiplexer 52 is a channel switching logic 5
Based on the command of No. 4, signals are sequentially received from the designated CT 51. The amplifier 53 amplifies the signal from the analog multiplexer 52.

The channel switching logic 54 is the same element as the channel switching logic 43 of the transmission circuit 40. In this case, the analog multiplexer 5 is input at every falling edge of a reception line switching pulse signal output from a reception line switching pulse generation circuit 202 of the sequence control circuit 47, which will be described later (scanning cycle).
The input switching state of No. 2 is changed.

As shown in FIG. 10, the control board 172 has the information processing device 30, and the transmission side thereof has
A sequence control circuit 47 that sends a transmission clock in response to a start signal input from the information processing device 30 via the CPU connector 46, a bandpass filter 48 that receives the transmission clock and outputs a transmission signal, and a transmission signal is amplified. And an amplifier 49 for sending to the transmission connector 41.

On the receiving side of the control board 172, an amplifier 71 for amplifying the received signal from the receiving connector 55 and a bandpass filter 72 for receiving the amplified signal.
And a full-wave rectifier / amplifier 73 that receives the received signal from the band-pass filter 72, and two-stage low-pass filters 74a and 74b that receive the received signal from the full-wave rectifier / amplifier 73.
And the received signal from the low-pass filter 74b, and is controlled by the sequence control circuit 47 to convert the received signal into digital data and output the digital data.
5 and a bidirectional RAM 76 which is controlled by the sequence control circuit 47 to write this digital data and which sends this data to the information processing device 30 via the CPU connector 46 in response to a read signal from the CPU connector 46. There is.

The control board 172 has a power supply unit 77. The capacity of the bidirectional RAM 76 is, for example, 2048 bytes.

The sequence control circuit 47 has a function of outputting a basic clock which is a source of the signal input to the transmission line 22, and the reception line switching pulse signal (first signal) for controlling the channel switching logics 54 and 43. It has a function of outputting a timing signal) and a transmission line switching pulse signal (second timing signal).

That is, as shown in FIG. 1, the sequence control circuit 47 outputs a basic clock signal to the clock circuit 201, and the basic clock from the clock circuit 201 is frequency-divided into a reception line switching pulse signal. A reception line switching pulse generation circuit 202 that outputs (indicated by reference symbol RXCLK in FIG. 2) every scanning cycle (for example, one clock of a basic clock), and further divides the output of the reception line switching pulse generation circuit 202. By this, a pulse of two cycles is formed every time the reception line 26 is switched once (every time the reception line switching pulse signal is output 32 times), and two interrupt pulse signals (indicated by INT in FIG. Interrupt pulse signal generating circuit 203 for generating the interrupt pulse signal, and a timing of every other rising edge of the interrupt pulse signal. Then, the transmission line switching for outputting the transmission line switching pulse signals (shown by reference symbol TXCLK in FIG. 2 and having a pulse width extremely shorter than the reception line switching pulse signal) for the number of skips instructed by the information processing device 30. And a pulse generation circuit 204.

Although not shown, the sequence control circuit 47 has a circuit which outputs the transmission clock by dividing the basic clock.

In the detection operation, the information processing device 30 reads the scan information from the card 173 (storage medium), receives the interrupt pulse signal INT from the interrupt pulse signal generation circuit 203, and switches the reception line 26 once. A new skip number is set in the transmission line switching pulse generation circuit 204 every time the switch is performed. That is, in the case of the present embodiment, the information processing device 30 is at the timing of switching to the 17th receiving line during the switching of the series of receiving lines 26, as shown in FIG. 2, at the rising edge of the interrupt pulse signal INT. At this timing, when the transmission line which is going to transmit the input signal next time has not received the transmission designation, it instructs the transmission line switching pulse generation circuit 204 to skip the transmission line. Further, when there are a plurality of consecutive transmission lines that are not used for signal detection, the information processing device 30 commands the transmission line switching pulse generation circuit 204 to skip these transmission lines.

The transmission line switching pulse generation circuit 204 outputs the transmission line switching pulse signal TXCLR in the cycle next to the skip setting of the interrupt cycle (timing at which the first reception line is switched in FIG. 2). At this time, one pulse is output if the next transmission line is not skipped. As a result, the transmission line is switched to the next transmission line. However, when the next transmission line is skipped, the transmission line switching pulse signal TXCLR is subsequently output to switch to the next transmission line, and the next transmission signal should be transmitted. Transmission lines will be skipped. Therefore, when switching from the transmission line switching pulse generation circuit 204 to the next transmission line,
In the case where one transmission line switching pulse signal TXCLR skips one or more signal lines continuously, assuming that the number of signal lines to be skipped is n, (n + 1) transmission line switching pulse signals TXCLR are output. To be done.

Further, the information processing apparatus 30 reads the monitoring area data registered in the card 173 and detects the bidirectional RAM 76 independently of the detection operation under the control of the sequence control circuit 47 or the information processing apparatus 30. It is programmed to read the data and associate the detected data with the monitoring area data of the pachinko ball to monitor the pachinko ball.

Next, the operation of this embodiment will be described.
The address signal and the control signal from the information processing device 30 are output via the CPU connector 46. The processing flow is shown in FIG. First, a case where scanning is performed on all transmission lines will be described.

When the start signal is transmitted from the information processing device 30 to the sequence control circuit 47, the sequence control circuit 47 divides the basic clock of 16 MHz according to the required clock frequency to generate a transmission clock. hand,
Output. The transmission clock from the sequence control circuit 47 is waveform-shaped from the digital signal to the analog signal by the bandpass filter 48, amplified by the amplifier 49, and sent to the transmission connector 41.

Further, the transmission signal is amplified by the amplifier 42 in the transmission circuit 40. Analog multiplexer 44
Is a channel switched by the channel switching logic 43 to sequentially operate the totem pole driver 45, whereby the totem pole driver 45 sequentially outputs the signals amplified by the amplifier 42 to the transmission line 22 (step 91). .

Then, an electromotive force is generated in each reception line 26 that intersects the transmission line 22 to which the signal is transmitted due to the electromagnetic induction action. At this time, when the pachinko ball, which is a metal, approaches the detection unit 20a, the detection unit 20a is affected by the influence.
Then, the magnitude of the electromotive force (induced current) of the reception line 26 changes.

The reason for this is not always analyzed clearly at present, but it can be considered as follows. First, pachinko balls are ferromagnetic because iron is the main component. Therefore, it occurs on the transmission line 22,
The magnetic flux that has spread in the space will be focused on the pachinko ball, and the distribution of the magnetic flux that links the reception lines will change. In addition, an eddy current is generated in the pachinko ball in the direction of canceling the magnetic flux generated by the transmission line 22. Because of these, the induced current changes. Which is dominant depends on the relative positional relationship between the pachinko ball and the transmission line 22 and the reception line 26. Also, whether or not the magnetic flux interlinking the reception line 26 increases depends on the relative positional relationship with the pachinko ball. Furthermore, it also depends on whether or not metal is present in the background.

Here, the pachinko game machine 10 of the present embodiment.
In general, in use, the is installed in a pachinko parlor relatively adjacent to the same pachinko game machine 10, as shown in FIG. Therefore, if the distance between the game machines 10 is narrowed, the transmission line 22
If a signal is transmitted to any one of the above, it may affect not only the main body of the game machine 10 but also the adjacent game machines 10 and cause mutual interference.

In this embodiment, in order to reduce the mutual interference, the transmission resistance distribution board 180 is used as described above. As a result, the transmission output currents of the uppermost two transmission lines 1 and 2 and the lowermost transmission line 32 are set lower than the output currents of the other transmission lines by the resistors 1801, 1802, and 1832.

This combination of resistors was selected experimentally as the most effective combination. The reason why this combination is optimal is unknown. However, in the game machine 10 having the present embodiment, the influence from the transmission lines 22 located at the uppermost part and the lowermost part is most likely to leak from the device body to the outside due to their positional relationship. This is because it can be considered. Therefore, by limiting the output current of these transmission lines, it is considered that the electromagnetic effect is reduced.

Unlike the present embodiment, the matrix sensor 2
At 0, when the positional relationship between the transmission line 22 and the reception line 26 is reversed, the transmission lines 22 installed on the rightmost and leftmost
Similarly to the present embodiment, the resistance for restricting the output current of is lower than the transmission current to other transmission lines, so that it is possible to reduce the external electromagnetic effect.

Further, the transmission impedance may be limited by a coil or the like instead of limiting the transmission current by using a resistor as in the present embodiment.

Further, without limiting the transmission current as in the present embodiment, as shown in FIG. 13, the dummy lines 22d are arranged at the upper and lower ends of the transmission line group, and the transmission line (transmission line) at the end is arranged. It is also possible to absorb external influences generated by 1 and 32).

On the receiving side, the receiving circuit 50 is synchronized with the transmitting circuit 40 by the sequence control circuit 47, and each CT 51
A signal is received from each reception line 26 via. As shown in FIG. 9, the voltage due to the induced current appearing in the plurality of reception lines 26 is converted to 10 times the magnitude by the CT 51.
Since the conversion is performed by CT51, it is not necessary to increase the amplification degree of the amplifier on the receiving side. CT51
Are the receiving lines 26 and the receiving circuit 5 of the matrix sensor 20.
The analog multiplexer 52 of 0 is insulated, and noise from the pachinko game machine 10 is prevented from entering the receiving circuit 50.

The analog multiplexer 52 has a CT 51
The signal from each receiving line 26 passing through is switched by the channel switching logic 54 and sequentially output. The signal from the analog multiplexer 52 is amplified 100 times by the amplifier 53 (step 92).

The received signal is received by the receiving connector 55 and the amplifier 7.
1. Amplification and detection are performed through the bandpass filter 72. The received signal from the bandpass filter 72 is an analog signal, and this analog signal is
The full-wave rectification / amplifier 73 performs waveform shaping. The signal from the full-wave rectifier / amplifier 73 is supplied to the low-pass filter 7
Averaging is performed by integration processing at 4a and 74b.

Next, the received signal is the A / D converter 75.
Sent to. The A / D converter 75 converts the signal from the receiving line 26 into a digital signal in a predetermined bit unit such as 12 bits, and outputs the converted signal (detection data) under the control of the sequence control circuit 47. Then, it is registered in the bidirectional RAM 76 (step 93).

That is, the bidirectional RAM 76 receives the write signal from the sequence control circuit 47, and the information processing apparatus 3 receives the write signal.
After the detection data is recorded irrespective of the operation of 0, the address is incremented by +1 at each scanning cycle (for example, every one clock) based on the clock signal output from the sequence control circuit 47 (step 94) to detect the detection data. Is registered in a different address for each detection unit 20a.

The above operation is repeated every scanning cycle. That is, the analog multiplexer 5 of the receiving circuit 50 is provided every scanning cycle.
2 switches the signal from each receiving line 26 (step 9
5) The above operation is performed 32 times on the 32 reception lines 26. When this is completed (step 96), at that point, the analog multiplexer 44 of the transmission circuit 40 switches the transmission line 22 (see step 97), the same processing is repeated 32 times again, and the detection units 20a are sequentially detected. The detection data is registered in a different address of the bidirectional RAM 76 in association with the detection unit 20a.

Therefore, the information processing device 30 reads out the detection data registered in the bidirectional RAM 76, so that the information processing device 30 is independent of the detection signal processing operation, at which point (detection unit 20a), at which point. Whether or not the sphere exists can be determined at any time by using any search condition.

Therefore, the information processing apparatus 30 reads the detection data recorded in the bidirectional RAM 76 by a read start signal, performs arithmetic processing, and stores the detection data in the card 173, if necessary. It is possible to monitor pachinko balls in correspondence with the monitoring data of.

The above operation is repeated every scanning cycle.

Next, the case where no transmission signal is sent to part of the transmission line 22 will be described.

When the transmission signal is not sent, it is necessary to specify the information indicating the line where the transmission signal is not sent, that is, the scanning is not performed. This designation may be designation of a line not to be scanned or designation of a line to be scanned. In this embodiment, the card 173 provides the signal processing system with scanning information that specifies the transmission line 22 to be scanned.

The transmission line 22 whose detection is not designated by the scan information of the card 173 is skipped by the operation of the scanning system described above, and the detection is not performed. The reason why the card 173 is used to provide the transmission information is that the signal processing system can cope with the change even if the structure of the pachinko game machine is changed.

That is, the reception line switching pulse signal RX
The channel switching logic 54 and the analog multiplexer 52 sequentially switch the signal from each reception line 26 for each scanning cycle by CLK (see step 95). When the above operation is completed 32 times with respect to the 32 reception lines 26 (see step 96), the channel switching logic 43 and the analog multiplexer 44 switch the transmission line 22 based on the transmission line switching pulse signal TXCLK at that time (step 96). 97). Then, the same process is repeated 32 times again. Here, when the transmission line is switched, the number of pulses of the transmission line switching pulse signal TXCLK that is output is information processed at the timing of the leading edge of the interrupt pulse signal immediately before that point, as shown in FIG. Since the number of skips is set in the transmission line switching pulse generation circuit 204 by the device 30, the transmission lines 22 are skipped by the number corresponding to the number of skips.

For example, when the transmission line 22 to which a signal is to be input is not registered as a detection position according to the scan information registered in the card 173, the transmission line switching pulse signal TXCLK becomes As shown in 2, three pulses are output. Therefore, these two transmission lines 22 are skipped.

The transmission line switching pulse signal TXCL
Although K is shown in an exaggerated size of wavelength in FIG. 2, since the pulse width is actually extremely short, these skip operations are performed in a time considerably shorter than the scanning cycle. Therefore, since this skip requires a long time, the detection operation for the first reception line 26 immediately after switching the transmission line is not hindered.

Then, the information processing apparatus 30 determines the bidirectional RA.
By reading the detection data registered in M76, it is possible to determine, at any time, at which position (detection unit 20a) the pachinko ball was present, independently of the detection signal processing operation.
It can be judged by any search condition.

Therefore, the information processing device 30 reads the detection data recorded in the bidirectional RAM 76 by a read start signal as necessary, performs arithmetic processing, and stores the detection data in the card 173. It is possible to monitor pachinko balls in correspondence with the monitoring data of.

As described above, according to the metal body detecting apparatus of the above embodiment, the card 173 which can be arbitrarily set by the user.
According to the scan information of 1., the detection operation for the specific transmission line 22 is omitted, and the detection operation is performed only for the designated transmission lines 22 one after another. Based on this, the pachinko ball can be managed. .

Therefore, if it is used for detecting a pachinko ball, the scan information is set according to the type of the pachinko game machine and the minimum detection range required according to the type of the pachinko game machine is not wasted. Scan,
There is an effect that the detection speed can be improved.

In the above embodiment, the sequence control circuit 47 outputs the first timing signal for sequentially scanning each line to the receiving circuit 50, and the transmitting circuit 40 makes one round of scanning by the receiving circuit 50. The second timing signal for advancing the scanning to the next line is output every time. Therefore, the line that is not scanned is specified as
The transmission line group is scanned by the second timing signal. However, the present invention is not limited to this. For example, all transmission lines may be scanned and some reception lines may be skipped. In this case, in the circuit of FIG. 1, the transmission line and the reception line may be replaced with each other.

[0108]

According to the present invention, since the electromagnetic effect leaking to the outside in the transmitting section of the matrix sensor can be reduced, mutual interference does not occur even if the apparatus to which the present invention is applied is installed close to each other. .

[0109]

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a sequence control circuit used in an embodiment of the present invention.

FIG. 2 is a waveform diagram of various control signals output from the sequence control circuit.

FIG. 3 is a perspective view showing an example of a pachinko game machine to which the metal body detection device of the present invention is applied.

FIG. 4 is a side sectional view of a board surface of a pachinko game machine.

FIG. 5 is a front view showing a matrix sensor.

FIG. 6 is a block diagram showing the configuration of the first embodiment of the present invention.

FIG. 7 is a block diagram of a transmission circuit of a transmission / reception board.

FIG. 8 is a block diagram showing a main part of a channel switching logic.

FIG. 9 is a block diagram of a receiver circuit of a transmitter / receiver board.

FIG. 10 is a block diagram showing the configuration of a control board.

FIG. 11 is a flowchart of scanning of a matrix sensor.

FIG. 12 is a view showing an arrangement example of pachinko game machines in a pachinko parlor.

FIG. 13 is a front view showing a matrix sensor in which dummy transmission lines are arranged at the ends.

[Explanation of symbols]

10 ... Pachinko game machine, 11 ... Board surface, 12 ... Guide rail, 13 ... Pin, 14a ... Prize hole, 14b ... Prize winning device device, 15 ... Discharge hole, 16 ... Surface glass body, 17 ... Inner glass body, 20 ... Matrix sensor, 20a detection unit, 2
2 ... Transmission line, 23 ... Transmission terminal portion, 26 ... Reception line, 27 ...
Receiving terminal portion, 30 ... Information processing device, 33 ... Launching handle, 34 ... Receiving tray, 40 ... Transmitting circuit, 50 ... Receiving circuit, 61 ... Folding portion, 62 ... Conductive wire, 66 ... Connector mounting plate, 170 ... Signal processing device, 171 ... Transmission / reception board, 172 ... Control board, 173 ... Card,
174 ... Storage device, 175 ... Personal computer,
176 ... Interface unit, 179 ... Communication line, 18
0 ... Transmission resistance distribution board, 1000 ... User, 1801
~ 1832 transmission resistance.

Claims (5)

[Claims] 1. A matrix sensor having a detection area having a planar expanse, and a signal processing system for driving the matrix sensor to detect the presence and position of a metal body. A transmission line group composed of a plurality of lines, a reception line group composed of a plurality of lines arranged in parallel,
A metal body that has a substrate that supports these, and that is arranged on the substrate such that the transmission line group and the reception line group intersect each other and their intersections are arranged in a matrix. In the detection device, the signal processing system consists of a transmission circuit that sequentially scans each line of the transmission line group and sends a signal current to them, and a reception circuit that sequentially scans each line of the reception line group and sequentially receives those reception signals. And a control signal that causes the transmission circuit and the reception circuit to scan the transmission line group and the reception line group, respectively, and determines the presence or absence of metal from the signal received by the reception circuit. And a signal processing device for detecting the position where the metal body is detected based on the information indicating the scanning line scanning position of the receiving circuit and the information indicating the receiving line scanning position of the receiving circuit. Predetermined The signal current sent to a particular transmission line, the metal detection apparatus and limits lower than the signal current to the other transmission line. 2. The transmission line according to claim 1, wherein the transmission circuit limits the signal current to a low level, is one or more transmission lines arranged at at least one end of a transmission line group arranged in parallel. A metal body detection device characterized by being a line. 3. The transmission line according to claim 2, wherein the transmission circuit limits a signal current to a low level, is a plurality of transmission lines arranged at at least one end of a transmission line group arranged in parallel. The transmitter circuit further transmits a signal current sent to the transmission line arranged at the end of the plurality of transmission lines whose transmission currents are limited, to the remaining transmission lines. A metal body detection device characterized by being restricted to a lower level than the above. 4. The metal body detection device according to claim 1, wherein the transmission circuit has a resistor group including one or more resistors connected to the transmission line in order to limit a signal current. 5. The transmission line group according to claim 4, wherein the transmission line group is composed of a plurality of lines arranged in parallel vertically, the first resistance being connected to the transmission line arranged at an uppermost portion, and the first resistance being provided at a lowermost portion. A second resistor having a resistance value lower than the first resistance, which is connected to the transmission line arranged, and a resistance lower than the second resistance, which is connected to the transmission line arranged second from the top. A metal body detecting device, comprising: a third resistance having a value; and a plurality of fourth resistances having resistance values lower than the third resistance, which are connected to all of the other transmission lines.