JP2700948B2 - Pachinko ball detection device and its filter circuit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pachinko ball detection device and a filter circuit thereof.

"Conventional technology" For example, in a pachinko game machine,
Accurately grasping what is called a ball and a ball as a prize for a ball that has entered the safe hole for each pachinko game machine is the most important information in profit management of a game hall and customer management. In order to grasp the incoming and outgoing balls, a pachinko game machine has been developed with a metal detecting device that detects the passage of pachinko balls along the board surface.

As such a metal detection device, an attempt has been made to detect the passage of a pachinko ball by providing a metal sensor having detection units in a matrix form by a transmission line and a reception line along the surface of a pachinko game machine.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, since pachinko game machines generally generate noise of various frequencies, if the frequency of the noise matches the transmission frequency to be used, the pachinko ball will There is a problem that the detection accuracy is deteriorated.

In order to solve this problem, it is conceivable to use the transmission frequency by switching between two types of frequencies, but for that purpose, two filter circuits suitable for each frequency must be provided, and the metal detection There is a problem that the space cannot be effectively used and the price cannot be reduced due to the downsizing of the device.

The present invention has been made in view of such a problem, and can independently deal with two types of transmission frequencies.
It is an object of the present invention to provide a pachinko ball detection device and a filter circuit thereof that can achieve effective use of space and cost reduction by downsizing.

"Means for Solving the Problems" The gist of the present invention for achieving the object is: (1) a filter provided in a pachinko ball detection device provided along the board of a pachinko game machine; The filter includes a first capacitor on the input side, and the first capacitor.
A first resistor connected at its output to a capacitor; and a transformer with a trimmer connected at its output to the first resistor, the transformer with a trimmer having a second capacitor at a primary side. And a third capacitor and a second resistor on the secondary side of the filter device of the pachinko ball detection device.

2. A pachinko ball detection device attached along the surface of a pachinko game machine, wherein a plurality of parallel folded transmission lines are attached to one surface of a substrate, and a plurality of parallel transmission lines whose electromagnetic characteristics change when the pachinko balls approach. The folded receiving line is electromagnetically coupled in a direction intersecting with the transmitting line, and is arranged on the opposite surface of the substrate to form a pachinko ball detection sensor having a planar detection matrix. A transmission circuit for sequentially transmitting an amplified signal of a frequency, a filter circuit for shaping a waveform for a transmission signal of the transmission circuit, and a reception circuit for sequentially receiving an amplified signal from each reception line in synchronization with the transmission circuit. And a pachinko ball detection device.

[Operation] When processing two types of transmission signals having different frequencies, the first capacitor on the input side cuts the direct current of the transmission signal based on the digital signal. The second capacitor and the third capacitor tune to two kinds of transmission frequencies, and the first resistor and the second
Set the input / output impedance with a resistor. The trimmer is adjusted so that the magnitudes of the transmission signals of the two frequencies are equal. In this way, a signal having a sine waveform with little distortion can be obtained by processing with the transformer with a trimmer.

In the pachinko ball detection device, when a current is applied to the folded transmission line forming the detection matrix to generate a magnetic field,
An electromotive force is generated in the reception line that is electromagnetically coupled to the transmission line due to a mutual induction action. At this time, when the pachinko ball approaches the pachinko ball detection sensor, an eddy current is generated on the surface of the metal in a direction to cancel the magnetic flux by the pachinko ball detection sensor. The impedance of the transmission line changes due to the influence of the eddy current, thereby changing the current. In response, the receiving line changes the magnitude of the electromotive force. At this time, the transmission line and the reception line are detected, and the position of the metal in the detection matrix can be grasped as coordinates from the intersection position. In this case, when the frequency of the transmission signal matches or approaches the frequency of the noise generated from the pachinko game machine or the like, the transmission signal is output at a frequency that is not affected by the noise. The filter circuit can obtain a sine waveform transmission signal with little distortion by processing with a transformer with a trimmer.

In the pachinko game machine, the movement of the pachinko ball can be tracked on the board as a change in coordinates, and the progress of the game is monitored by associating a pachinko ball detection sensor with key points such as safe holes and out holes on the board, Know the situation of incoming and outgoing balls,
It is used as a data for nailing control, checking for abnormalities caused by improper management, nail adjustment, etc.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 17 show an embodiment of the present invention. In the first embodiment, a case is described in which a pachinko ball detection device is configured by using a metal sensor as a pachinko ball detection sensor and applied to the pachinko game machine 10.

As shown in FIGS. 2 and 3, a pachinko game machine
A detection matrix 20 that constitutes a pachinko ball detection sensor is provided along the board surface 11 of the panel 10.

On the board 11 of the pachinko game machine 10, the inside of the guide rail 12 forms a game area, into which a large number of nails 13,13 ... that play pachinko balls are driven, and safe holes 14a, 14a ...
Has been established, and an out hole 15 has been established at the lower end of the game area.

The front glass cover covering the panel surface 11 has a double structure including a front glass body 16 and an inner glass body 17.

On the front of the pachinko game machine 10, a launching handle 33 for performing a pachinko ball launching operation, and a ball tray for receiving a launching ball.
34 are provided.

As shown in FIG. 4, the plurality of transmission lines 22 are formed in a parallel folded shape (or loop shape) in which one transmission line 22 makes a U-turn at the folded portion 61, and these are arranged in parallel in one direction. Are arranged on the same plane. Also, the plurality of reception lines 26
Similarly, one reception line 26 is formed in a parallel folded shape (or loop shape) by making a U-turn, and these are arranged on the same plane in parallel in one direction. The transmission terminal 23 and the reception terminal 27 are arranged at the lower end of the inner glass body (front glass) 17 in a vertical relationship when mounted on a pachinko game machine.

Each reception line 26 is electromagnetically coupled to each transmission line 22 and is arranged in a cross direction perpendicular to a plane parallel position to each transmission line 22 so that the electromagnetic characteristics change due to the approach of a metal such as a pachinko ball. The transmission line 22 and each reception line 26 constitute a detection matrix 20.

In the front view of FIG. 4, each transmitting line 22 and each receiving line 26 intersect.
Are formed as detection units 20a, 20a,... For detecting a pachinko ball by an impedance change which is an electromagnetic characteristic value. Some of the detection units 20a, 20a ... correspond to the safe holes 14a, 14a ... as shown in FIG. The detection matrix 20 is provided on an inner glass body (front glass) 17 which is on the inner side and on the side of the board among two glass bodies covering the board 11 as shown in FIG.

FIG. 5 (A) is an enlarged sectional view of the inner glass body,
(B) shows an enlarged view of a part circled by a broken line in (A). The inner glass body 17 includes an inner protective glass plate 17a which is a protective sheet for the receiving line 26 (shown in FIG. 4), a receiving glass base substrate 17b, a transmitting glass base substrate 17c, and a transmitting line 22 (FIG. 4). Has a four-layered structure of an outer glass plate 17d which is a protective sheet for the above. The inner glass body (front glass) 17 typically has a vertical length a of 367 mm.
A glass substrate having a square shape with a size of ± 10 mm and a lateral length b of 405 mm ± 10 mm, and having a thickness of 3.0 to 3.5 mm. The inner protective glass plate 17a and the outer glass plate 17d
The vertical length is shorter than the receiving glass base substrate 17b and the receiving glass base substrate 17c, and the inner glass body 17 has a lower end 1
7p is exposed.

A plurality of parallel folded receiving lines 26 are sandwiched between the inner protective glass plate 17a and the receiving glass base substrate 17b, and between the transmitting glass base substrate 17c and the outer glass plate 17d, A plurality of parallel folded transmission lines 22 are sandwiched. Accordingly, the inner glass body 17 forms the transmission line 22 on one surface of the transmission-side glass base substrate 17c with the transparent adhesive layer 1.
8a, and the outer glass plate 17
d is adhered by the transparent adhesive layer 18b, and the receiving line 26 is formed on the other surface of the receiving-side glass base substrate 17b by the transparent adhesive layer 18c.
And placed on top of it, with an internal protective glass plate
17a is adhered by a transparent adhesive layer 18d, and the other surface of the transmission-side glass base substrate 17c and the reception-side glass base substrate 1
7b is bonded to the other surface by a transparent adhesive layer 18e.

A transparent conductive film for shielding is provided on the entire surface of the outer glass plate 17d, which is the front side of the transmission lines 22. The transparent conductive film is formed of an indium oxide (ITO) film, a tin oxide film, or the like.

As shown in FIG. 4, a rectangular transmission-side glass base substrate 17c is bonded to a transmission-side folded substrate 19a formed of an elongated flexible printed circuit board (FPC) along one side in the vertical direction, and the opposite side in the vertical direction. An L-shaped transmission-side routing board 19b, also made of a flexible board, is adhered along a part of the side of the lower end and the side of the lower end. As shown in FIG. 6, the transmission-side folded substrate 19a has a plurality of, specifically, 32 arc-shaped folded portions 61 formed in a line by a metal pattern made of copper foil, and as shown in FIG. One end 61a of each folded part 61 is connected to one end 6 of a wire 62.
2a is connected by soldering using solder 63 or welding.

FIG. 8 is an enlarged view of a portion circled by a broken line in FIGS. 4 and 5. As shown in FIG. 7, the lower end of the transmission side routing board 19b on the opposite side has a plurality of, specifically 64, metal patterns made of copper foil on a part of the side thereof along the edge thereof. A transmission terminal 23 for external connection extending in the vertical direction is formed.

As shown in FIG. 5 (A), the transmission terminal 23 is disposed at the lower end 17p of the inner glass body 17 and is exposed without being covered by the outer glass plate 17d. That is, the outer glass plate 17d is
It is bonded on the transmission line 22 excluding the transmission terminal 23 on the transmission-side glass base substrate 17c. The terminal side of each transmission line 22 is the transmission terminal 23 of each transmission line 22 and the routing part to each transmission terminal 23.
64. The routing portion 64 for each transmission terminal 23 is formed on the transmission side routing substrate 19b by a metal pattern, and extends from each transmission terminal 23 along the transmission side routing substrate 19b.

In FIG. 6, the other end 62b of the wire 62 extending from one end 61a of each folded portion 61 is provided with a tension on the wire 62, and a solder 63 using a solder 63 is provided at the starting point 64a of the corresponding wrapping portion 64 on the terminal side. It is connected by attachment or welding and connected to the transmission terminal 23 via the routing portion 64. It should be noted that the routing unit 64 connects two straight portions by a circular arc portion 64R in order to remove high-frequency interference.

Similarly, the rectangular receiving-side glass base substrate 17a is
The receiving-side folded substrate 29a is bonded along one side of the upper end in the horizontal direction, and the elongated receiving-side routing substrate 29b is bonded along a part of the lower side in the horizontal direction. Similarly to the transmission-side folded substrate 19a, the reception-side folded substrate 29a forms a plurality of, specifically, 32 arc-shaped folded portions 61 with a metal pattern made of copper foil, and a wire 62 is attached to one end 61a of each folded portion. Is connected by soldering using a solder 63 or welding.

At the lower end of the opposite receiving-side routing substrate 29b, on the edge thereof, along a part of the side, when the receiving-side glass base substrate 17b is bonded to the transmitting-side glass base substrate 17c, they do not overlap each other. A plurality of, specifically 64, receiving terminals 27 for external connection extending in the vertical direction are formed by a metal pattern made of copper foil at non-opposing positions.

The receiving terminal 27 is, as shown in FIG.
And is exposed at the lower end 17p without being covered by the inner protective glass plate 17a. That is, the inner protective glass plate 17a
Is bonded on the receiving line 26 excluding the receiving terminal 27 on the receiving-side glass base substrate 17b. The terminal side of each reception line 26 has a reception terminal 27 of each reception line 26 and a routing section 64 to each reception terminal 27. The routing section 64 to each receiving terminal 27 is
It is formed on the receiving side routing board 29b by a metal pattern, and extends from each receiving terminal 27 along the receiving side routing board 29b.

The other end 62b of the wire 62 extending from one end 61a of each folded portion 61
Is the wire 62 with tension, and the corresponding terminal side
The starting point 64 a of the base plate 64 is connected to the receiving terminal 27 via the routing part 64 by being connected by soldering or welding using the solder 63.

As described above, the transmission line 22 and the reception line 26
a, 29a, the folded portions 61 formed on the routing boards 19b, 29b, the wires 62, the wires 62, the transmission terminal 23 forming the end of the transmission line 22, and the reception line. The receiving terminal 27 which is the end of 26
It is composed of Each wire 62 has a matte-treated black surface to prevent light reflection in order to make it inconspicuous to the player.

Detection matrix 20 suitable for normal pachinko game machine 10
Is a pattern in which the transmission line 22 has 32 rows, the reception line 26 has 32 columns, and the number of detection units 20a is 1024 in total. In FIG. 4, the patterns other than the outer patterns are omitted.

The thickness of the wires constituting 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. 4, the entire widths c and d of the transmitting terminal 23 and the receiving terminal 27 are each 126 mm, and as shown in FIG. 19b
Each of the widths e and f of the portions extending in the vertical direction is formed to be 10 mm or less.

As shown in FIG. 8, the width g of each of the transmission terminal 23 and the reception terminal 27 is 1.5 mm. Routing section 64
By setting the widths e and f to 10 mm or less, the transmission-side folded board 19a and the transmission-side wiring board 19b are hidden by the mounting frame for the inner glass body (front glass) 17 of the pachinko game machine, It is not visible from the front of the building.

As shown in FIG. 9, a transmission circuit board 66a and a reception circuit board 66b are installed in the lower portion inside the mounting frame, and the transmission circuit board 66a has a transmission circuit for transmitting to the plurality of transmission lines 22 of the detection matrix 20. The circuit 40 is provided, and the receiving circuit 50 for receiving from the plurality of receiving lines 26 is provided on the receiving circuit board 66b. On these boards 66a and 66b, a transmission connector 67a and a reception connector 67b are provided at positions corresponding to the transmission terminal 23 and the reception terminal 27.

The transmission connector 67a is an edge connector for detachably connecting the transmission terminal 23 to the transmission circuit 40 on the transmission circuit board 66a, and the reception connector 67b is configured to detach the reception terminal 27 from the reception circuit 50 on the reception circuit board 66b. It is an edge connector for making possible connections. That is, the transmission connector 67a and the reception connector 67b are connected to the transmission circuit board 66a and the reception circuit board 66a.
A groove 68a is formed along the length of the elongated insulator 68 along the length of the insulator 68 along the length thereof, and each circuit board is formed at the bottom of the groove 68a.
A large number of conductive wires connected to 66a, 66b are buried in the direction perpendicular to each of the substrates 66a, 66b in a state of being insulated by a base rubber so as not to contact each other.

The transmission terminal 23 and the reception terminal 2 are provided in the groove 68a of each insulator 68.
The inside glass body (front glass) 17 on which the 7 is arranged can be inserted, the transmission connector 67a contacts the transmission terminal 23 of the transmission line 22 with the inside glass body 17 sandwiched from both sides, and the reception connector 67b In this state, it is connected to the receiving terminal 27 of the receiving line 26.

The connection between the transmission terminal 23 and the reception terminal 27 and the transmission circuit 40 and the reception circuit 50 is performed by positioning the reception terminal 23 and the reception terminal 27 below the inner glass body 17 so as to be connectable to the transmission connector 67a and the reception connector 67b. This is performed by inserting the inner glass body 17 into a mounting frame so as to insert the inner glass body 17 into the mounting frame so that the transmitting terminal 23 and the receiving terminal 27 are securely connected to the transmitting connector 67a and the receiving connector 67b.

A signal processing system constituting a pachinko ball detection device for detecting a pachinko ball is as shown in FIG. 10 to FIG.

As shown in FIG. 10, the detection matrix 20 is under the control of the CPU memory control board 172 via the matrix I / O transmission / reception board 171. The CPU memory control board 172 can communicate with the communication line 179, and can read and use the data of the RAM card 173. RAM card 173 has safe holes 14a, 14a
., The detection algorithm of the pachinko balls entering the safe holes 14a, 14a, and the like are recorded.

The option 174 connected to the CPU memory control board 172 is a device for recording a trajectory of a pachinko ball moving between the board surface 11 of the pachinko game machine 10 and the inner glass body 17. The option 174 may be of a type that stores data in a semiconductor memory or the like.However, during a time period when the number of players increases, the operation rate of the pachinko game machine 10 increases, so a huge storage capacity is required, and a huge storage capacity is required. Since a required semiconductor memory is generally expensive or requires a larger space, the movement of a pachinko ball is recorded using a hard disk. The recorded data is applied to a computer incorporating software for analyzing the trajectory of a pachinko ball, and is subjected to arithmetic processing, whereby necessary data can be obtained in a pachinko game hall (hall).

The matrix I / O transmission / reception board 171 has a transmission circuit board 66a provided with the transmission circuit 40 and a reception circuit board 66b provided with the reception circuit 50.

The transmission circuit 40 includes a transmission connector 41 as shown in FIG.
The amplifier 42 and the channel switching logic 43 connected to the transmission connector 41, the analog multiplexer 44 connected to the amplifier 42 and the channel switching logic 43, and the analog multiplexer 44, and a plurality of, specifically, Is composed of 32 PNP + NPN totem pole drivers 45 connected to the transmission line 22 side of 32 circuits, respectively.

The channel switching logic 43, as shown in FIG.
The operation is performed by two control lines for clock and reset by effectively utilizing the counter IC 43a.

The receiving circuit 50 includes a receiving connector 55 as shown in FIG.
, Specifically, 32 CT sensors (current transformers) 51 connected to the receiving line 26 side of 32 circuits, respectively, and a CT sensor 51
, An amplifier 53 and a channel switching logic 54 connected to the analog multiplexer 52, and an amplifier 53 and a channel switching logic 54
And a receiving connector 55 connected to the receiving connector.
The CT sensor 51 includes a receiving line 26 and an analog multiplexer 52.
And amplifies the signal from each reception line 26 by 10 times. The channel switching logic 54 is a member similar to the channel switching logic 43 of the transmission circuit 40.

As shown in FIG. 14, CPU memory control board 1
On the transmitting side, a CPU connector 46 connected to the CPU unit 30, a sequence control circuit 47 for transmitting a transmission clock in accordance with a start signal from the CPU unit 30 via the CPU connector 46, and a transmission clock receiving the transmission clock It has a bandpass filter 48 for transmitting a signal, and an amplifier 49 for amplifying a transmission signal and transmitting the amplified signal to a transmission connector. Sequence control circuit 47
Is configured to send transmission clocks for two transmission frequencies, f ₁ (1 MHz) and f ₂ (1.3 MHz).

The bandpass filter 48 has the configuration shown in FIG. 1 in detail. That is, the bandpass filter 48 is
The first capacitor (C1) 81 on the input side and the first capacitor 81
A first resistor (R1) 82 connected at its output to the
It has a transformer with a trimmer 83 connected at its output to the resistor 82. The primary side of the transformer 83 with a trimmer has a second capacitor (C2) 84, and the secondary side thereof has a third capacitor (C3) 85, a second resistor (R2) 86, and a third resistor (C2). R3) 87. The transformer 83 with a trimmer is designed to adapt to the intermediate frequency f ₀ (1.15 MHz) in order to support two transmission frequencies of f ₁ (1 MHz) and f ₂ (1.3 MHz). See Figure 17).

On the receiving side, the CPU memory control board 172 includes an amplifier 71 that amplifies a signal received from the receiving connector 55.
, A band-pass filter 72 that receives the amplified signal, a full-wave rectifier / amplifier 73 that receives the signal received from the band-pass filter 72, and a signal 2 that receives the received signal from the full-wave rectifier / amplifier 73.
Stage low-pass filters 74a, 74b and low-pass filter 74b
An A / D converter 75 that receives a received signal from the controller and sends digital data to the bidirectional RAM 76 under the control of the sequence control circuit 47, receives the digital data, writes the received data under the control of the sequence control circuit 47, It has a bidirectional RAM 76 that sends received data to the CPU unit 30 via the CPU connector 46 in response to a read signal from the connector 46.

The bidirectional RAM 76 has a counter inside, and all the processing of the matrix data of pachinko balls is performed by the counter. Further, the CPU memory control board 72 has a power supply unit 77.

The voltage waveform to the transmission line 22 has a frequency of 1 to 1.3 MHz.
A continuous sine wave centered at 0V is preferred.

 Next, the operation will be described.

Address signals and control signals from the CPU unit 30 are passed through the CPU connector 46 to the pachinko game machine 10.
Is transmitted to

In the pachinko game machine 10, on the transmitting side, the sequence control circuit 47 receives a start signal, divides the 16 MHz original clock as necessary, and switches between two types of transmission clocks. Outputs a clock for the transmission frequency that is not affected by noise. In this way, when the frequency of the transmission signal matches or approaches the frequency of the noise generated from the pachinko game machine 10, etc., it is possible to prevent the influence of the noise.
At this time, the transmission frequencies are f ₁ (1 MHz) and f ₂ (1.3M) as frequencies not affected by the noise of the pachinko game machine 10.
Hz).

The transmission clock from the sequence control circuit 47 is shaped by a bandpass filter 48 from a digital signal to an analog signal.

In the band-pass filter 48, in order to process two types of transmission signals having different frequencies, the first capacitor 81 on the input side cuts the DC of the transmission signal based on the digital signal.
A second capacitor 84 and a third capacitor 85 tune to two types of transmission frequencies, and a first resistor 82 and a second resistor 86 set the input / output impedance. Trimmer 83
As a result, as shown in FIG. 17, f ₁ (1 MHz) and f ₂ (1.3 MHz
Adjustment is made so that the magnitudes and sensitivities of the transmission signals of the two types of frequencies are equal. In this way, a signal having a sine waveform synchronized with the digital signal with little distortion can be obtained by the processing in the transformer 83 with the trimmer.

After waveform shaping by the bandpass filter 48, the transmission signal is 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. The analog multiplexer 44 sequentially operates the totem pole driver 45 on the channel switched by the channel switching logic 43, whereby the totem pole driver 45 sequentially transmits the signal amplified by the amplifier 42 to the transmission line 22 at a predetermined cycle. Output (No. 15
(See FIG. 91).

On the receiving side, as shown in FIG. 13, a current as an electromagnetic characteristic value appearing on the plurality of receiving lines 26 is detected by the CT sensor 51 for 10 times.
It is amplified twice. Because amplification is performed by the CT sensor 51,
As a result, it is not necessary to increase the degree of amplification of the amplifier on the receiving side. Since the amplification by the CT sensor 51 is performed while insulating each reception line 26 from the analog multiplexer 52, the amplification can be performed without generating noise. This allows the OP
As compared with the case where an amplifier is used, it is possible to prevent the occurrence of noise and DC drift due to the OP amplifier itself, and to improve the detection accuracy of the received signal. The use of the CT sensor 51 makes the OP generally larger than the CT sensor.
Eliminates the need to use an amplifier, matrix I / O transmission
The size of the receiving board 71 can be reduced.

The analog multiplexer 52 switches signals from the respective receiving lines 26 that have passed through the CT sensor 51 by the channel switching logic 54, and sequentially outputs the signals at a predetermined cycle. The signal from the analog multiplexer 52 is output by the amplifier 53 to 100
It is doubled (see step 92 in FIG. 15).

The reception signal is amplified and filtered through a reception connector 55, an amplifier 71, and a band-pass filter 72. The received signal from the band-pass filter 72 is an analog signal in which several cycles constitute one scan, as shown in FIG. This analog signal is subjected to waveform shaping by a full-wave rectifier / amplifier 73 as shown in FIG. 16 (B).

The signal from the full-wave rectifier / amplifier 73 is averaged by an integration process as shown in FIG. 16 (C) by a low-pass filter 74a.
Then, as shown in FIG. 16D, averaging is performed. As a result, the noise is also averaged with the received signal,
The amount of noise is extremely small compared to the signal, and errors due to noise can be ignored. Low pass filter 74a,
When averaging is performed by 74b, since the noise has already passed through the band-pass filter 72, there is no noise enough to cause an error.

Next, the received signal is sent to A / D converter 75. A / D
The converter 75 converts a signal from the detection matrix 20 into a digital signal in a predetermined bit unit, for example, 12 bits,
The received data is recorded in the bidirectional RAM 76 under the control of the sequence control circuit 47 (see step 93 in FIG. 15). This processing speed is as high as 25,000 times per second.
The bidirectional RAM 76 records received data irrespective of the operation of the CPU unit 30 by a write signal from the sequence control circuit 47, and then inputs one clock to increase the address by +1 (see step 94 in FIG. 15). ). Two-way RA
The capacity of M76 is, for example, 2048 bytes.

Thus, the analog multiplexer 52 of the receiving circuit 50
Switches the signal from each reception line 26 (step 95 in FIG. 15).
The above steps are repeated 32 times according to the 32 reception lines 26 (see step 96 in FIG. 15). After 32 repetitions, the analog multiplexer 44 of the transmitting circuit 40
(See step 97 in FIG. 15), and the signal processing is repeated again.

The CPU unit 30 reads data on the position of the pachinko ball recorded in the bidirectional RAM 76 by a read start signal as necessary, and performs an arithmetic process. Then, CPU unit 30 repeats this process. The respective circuits of the CPU memory control board 172 and the CPU unit 30 perform processing while ignoring each other's waiting time.
Is reduced, and the processing speed of the CPU unit 30 can be increased.

If the algorithm of ball detection is a simple one, it is sufficient to use an inexpensive 8-bit CPU. If a complicated algorithm is required, the CPU unit 30 performs high-speed processing. It is better to select one that uses a 16-bit CPU. In any case, the scanning speed of the pachinko ball is not affected by the CPU because the scanning is not performed via the CPU.

In this manner, a current is caused to flow through the folded transmission line 22 to generate a magnetic field, and the reception line 26 electromagnetically coupled to the transmission line 22 is generated.
When an electromotive force is generated by the mutual induction action, when a pachinko ball is applied to the detection unit 20a, an eddy current is generated on the surface of the pachinko ball, which is a metal, in a direction in which the magnetic flux generated by the detection matrix 20 is canceled. This changes the impedance which is the electromagnetic characteristic of the detection matrix 20 at that position,
26 changes the magnitude of the electromotive force. Transmission line 2 at this time
, And the corresponding receiving lines 26, 26,... Can be detected by scanning.

Therefore, the position of the pachinko ball can be grasped as the coordinates of the position where the receiving lines 26, 26... Where the impedance has changed and the transmitting lines 22, 22,. Detection unit
The number of 20a is 32 lines for transmission line 22 and 32 columns for reception line 26, totaling 102
Since there are four pachinko balls, the safe holes 14a
And can also be detected through the out hole 15.

Since the voltage waveform to the transmission line 22 is a continuous sine wave centered on 0 V, there is no generation of noise such as a rectangular wave, and the influence on other devices such as the CPU unit 30 is prevented. Can be.

In addition, the transparent conductive film on the surface of the outer glass plate 17d has a function of shielding the electrical influence of a metal or a derivative from the outside and increasing the reaction sensitivity to pachinko balls.

The CPU unit 30 reads the data of the positions of the detection units 20a, 20a... Corresponding to the key points such as the safe holes 14a, 14a. The progress of the game is monitored by tracking the movement of the pachinko ball on the board 11 as a change in coordinates. By knowing the situation of incoming balls, outgoing balls, and the like, it is possible to use them as data for nailing control, checking for abnormalities due to improper management, illegal operations, and the like. The RAM card 73 may be replaced with a new one when the new pachinko game machine 10 monitors the state of the insertion of pachinko balls. RAM card 173 is the same model of pachinko game machine 10
, One card can be copied and manufactured.

Note that the connection is made by using the weight of the inner glass body (front glass) 17 so that the transmission terminal 23 and the reception terminal 27 are placed on the lower side and connected to the transmission connector 67a and the reception connector 67b inside the lower part of the mounting frame. The connection can be performed simultaneously when the inner glass body 17 is mounted on the mounting frame.

Further, since the folded portion 61 of the transmission line 22 and the reception line 26 is formed by a conductor pattern, the transmission line 22 and the reception line
Since the manufacture of the transmission line 22 and the reception line 26 is facilitated, and the routing part 64 of the transmission line 22 and the reception line 26 is formed by a metal pattern, the transmission line 22 and the reception line 26 are further easily manufactured.

Further, since the transmission line 22 and the reception line 26 are configured by the wires 62, and the folded portions 61 and the wrapping portions 64 are formed by a metal pattern, by forming the wires 62 for detecting pachinko balls thin, The pachinko ball detection unit does not block the board 11 of the pachinko game machine 10 and is inconspicuous from the player.

When the routing portions are formed on both surfaces of the routing substrate, the width of the routing portions can be easily reduced.

In the embodiment, the folded substrate and the routing substrate are:
One or both are flexible printed circuit boards (FP
Instead of C), it may consist of a thin glass epoxy substrate. Since the glass epoxy substrate is milky white, it is inconspicuous when used, and is resistant to heat, so that it is prevented from being broken by heat when soldering the wires of the transmission line and the reception line.

In the embodiment, the transmission terminal and the reception terminal are:
Although the inner glass body (front glass) is arranged at the lower end thereof in a vertical relationship when attached to the pachinko game machine, it may be arranged at the upper end of the inner glass body. In this case, the transmission connector 67a, the reception connector 67b, the transmission circuit board 66a, and the reception circuit board 66b can be made inconspicuous.

In the embodiment, the option 174 records the movement of the pachinko ball using any one of an optical disk, an optical / magnetic disk, an analog or digital tape recorder, and a video tape in addition to the hard disk. There may be.

Further, the transmission frequency may be switched between 1 MHz and 1.3 MHz and a frequency of another value.

[Effects of the Invention] According to the pachinko ball detection device and the filter circuit thereof according to the present invention, when the frequency of the noise generated by the pachinko game machine or the like and the transmission frequency match or approach, the pachinko ball or the like is affected by the noise. In order to prevent the metal detection accuracy from deteriorating, when switching to a frequency that is not affected by noise among the two types of frequencies and transmitting,
Since a single filter circuit can cope with two types of transmission frequencies, it is possible to achieve effective use of space and cost reduction by downsizing the pachinko ball detection device.

In particular, with pachinko game machines, data such as the track of pachinko balls on the board, the number of pachinko balls hit by the player, and the ball entry rate into the safe hole can be easily and without being affected by the noise of pachinko game machines. Since it is possible to obtain the information quickly and to know the details of the game remotely, it is possible to raise the level of counting control of the pachinko game machine, and it is easy for anyone to adjust the nails of the pachinko game machine. be able to.

[Brief description of the drawings]

1 to 17 show an embodiment of the present invention.
FIG. 2 is a circuit diagram showing a detailed configuration of the bandpass filter, FIG. 2 is a perspective view conceptually showing the pachinko game machine and the detection matrix in an exploded manner, FIG. 3 is a partial longitudinal sectional view of the pachinko game machine, FIG. 4 is a front view of the detection matrix, FIG. 5 is an enlarged sectional view of an inner glass body having the detection matrix,
FIG. 6 is a detailed front view of the transmission line, FIG. 7 is an enlarged sectional view of the transmission line showing the connection state of the wires, FIG. 8 is an enlarged front view of the transmission terminal, and FIG. And a perspective view showing a state connected to a receiving connector, FIG. 10 is a schematic configuration diagram of a pachinko ball detection device, and FIG. 11 is a matrix I /
O Block diagram of the transmission circuit of the transmission / reception board, FIG. 12 is a block diagram showing the main part of the channel switching logic, FIG.
FIG. 13 is a block diagram of a reception circuit of a matrix I / O transmission / reception board, FIG. 14 is a block diagram of a reception and transmission circuit of a CPU memory control board, FIG. 15 is a flowchart of scanning of a detection matrix, FIG. FIG. 17 is a waveform diagram showing signal processing of a received signal, and FIG. 17 is a graph illustrating adjustment of a transmission frequency. B ... Pachinko ball, 10 ... Pachinko game machine 11 ... Board, 13 ... Nail 14a ... Safe hole, 15 ... Out hole 17 ... Inner glass body 19a, 29a ... Folded board 19b, 29b ... Wiring board 20: Detection matrix, 22: Transmission line 23: Transmission terminal, 26: Reception line 27: Reception terminal, 30: CPU unit 46: CPU connector 47: Sequence control circuit 48: Band-pass filter 61 ... folded part, 62 ... wire 64 ... routing part 67a ... transmission connector, 67b ... reception connector 75 ... A / D converter 76 ... bidirectional RAM 81 ... first capacitor, 82 First resistor 83 Transformer with trimmer 84 Second capacitor 85 Third capacitor 86 Second resistor 87 Third resistor

Continuation of front page (56) References JP-A-1-104283 (JP, A) JP-A-64-58286 (JP, A) JP-A-1-119788 (JP, A) JP-A-2-279186 (JP) , A) Real opening 51-75139 (JP, U)

Claims (2)

(57) [Claims] 1. A filter provided in a pachinko ball detection device provided along a surface of a pachinko game machine, the filter comprising a first capacitor on an input side and an output side connected to the first capacitor. And a transformer with a trimmer connected on the output side to the first resistor, the transformer with a trimmer has a second capacitor on a primary side, and a secondary A filter device for a pachinko ball detection device, comprising a third capacitor and a second resistor on the side. 2. A pachinko ball detection device provided along a surface of a pachinko game machine, wherein a plurality of parallel folded transmission lines are attached to one surface of a substrate, and electromagnetic characteristics are changed by the approach of the pachinko balls. A plurality of parallel folded reception lines, which are electromagnetically coupled in a direction crossing the transmission lines, are arranged on the opposite surface of the substrate to form a pachinko ball detection sensor having a planar detection matrix; A transmission circuit for sequentially transmitting an amplified signal of a predetermined frequency to a line; a filter circuit for shaping a waveform for a transmission signal of the transmission circuit; and sequentially receiving an amplified signal from each reception line in synchronization with the transmission circuit. A pachinko ball detection device, comprising: a receiving circuit.