JP3208893B2 - Detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object having a high impedance such as a human body coming into contact with a detection unit (including proximity).
Alternatively, the present invention relates to a detection device that detects that the device is in a non-contact state.

[0002]

2. Description of the Related Art Conventionally, in various fields, detection devices for detecting that a high-impedance object such as a human body has come into contact with a switch or a handle have been used. For example, a pachinko gaming device is provided with a device for detecting a player's grip of a firing intensity adjustment handle of a pachinko ball firing device. This detection device incorporates an oscillation circuit in which a part of a circuit component is extended to a firing intensity adjustment handle, and an oscillation state detection circuit that detects an oscillation state of the oscillation circuit. Each circuit component is designed and adjusted so that the oscillation circuit oscillates or stops due to an impedance change caused by gripping. The contact state of a human body or the like is detected based on whether or not the oscillation circuit oscillates.

[0003]

However, the conventional detection device has the following problems. As an oscillation circuit in which oscillation continues or stops when a high-impedance object comes into contact, an LC oscillation circuit that is a simple high-frequency oscillation circuit, for example, a Colpitts-type or Hartley-type oscillation circuit is generally used. Even though these are simple oscillation circuits, they have a feedback circuit, so the number of circuit components is large, and considerable effort is required to adjust the feedback amplification factor and impedance to maintain the oscillation state. I needed it.

In addition, it has been extremely difficult in practice to accurately determine whether a high impedance object such as a human body is in contact or not with a binary determination of whether or not the oscillation circuit is oscillating. That is, the impedance value exhibited by the human body varies considerably depending on changes in the humidity of the environment, the state of sweating of the human body, age, constitution, and the like, and furthermore, varies depending on the state of contact with the detection unit (such as gripping, contacting, etc.)
It was extremely difficult to determine non-contact with a certain degree of accuracy or more.

The present invention solves such a problem, and has a simple and inexpensive circuit configuration with a small number of components, and a high impedance object is brought into contact with the detection unit (including the proximity state) without requiring complicated circuit adjustment and the like. ) Or a non-contact state can be determined with high accuracy, and the following configuration is adopted.

[0006]

A detection device according to the present invention uses a circuit component of a resonance circuit driven by an output signal from a microprocessor as a detection unit, and the resonance state of the resonance circuit is controlled by the microprocessor. Detecting a contact state of a high impedance object with respect to the detection unit by detecting the detection signal, wherein the microprocessor sequentially inverts the output signal based on a certain rule, thereby providing discrete signals in a predetermined frequency band. Frequency scanning means for simulating a typical multiple-frequency AC power supply and driving the resonance circuit at each frequency, and detecting and storing the impedance value of the resonance circuit driven by the frequency scanning means for the plurality of frequencies. Means for detecting and storing the impedance, and determining the maximum value of the detected impedance. Means for determining the maximum value of the impedance and 1 / n (n> 1) times the maximum value of the determined impedance as a determination reference value, and using the determination reference value and the plurality of frequencies stored by the impedance detection storage means. A comparison means for comparing the impedance value of the resonance circuit with the impedance value of the resonance circuit, and a determination means for determining contact or non-contact including a proximity state of the high impedance object to the detection unit based on a comparison result by the comparison means. And

[0007]

In the detecting device of the present invention having the above-described configuration, the frequency scanning means of the microprocessor simulates a plurality of discrete AC power supplies, and can drive the resonance circuit at each frequency. . The impedance value of the resonance circuit for each of the plurality of frequencies is detected and stored by the impedance detection storage unit. The maximum value is determined by the maximum value determining means.

Accordingly, 1 / n (n> 1) times the maximum value of the impedance determined by the maximum value determining means is compared with the impedance value of the resonance circuit at each of a plurality of frequencies by the comparing means, and the comparison result is obtained. Is comprehensively determined for the predetermined frequency band by the determination means, it is possible to determine the resonance state of the resonance circuit, that is, the contact (including the proximity state) or non-contact of the high impedance object with the detection unit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, an embodiment in which the detecting device of the present invention is applied to a pachinko ball firing device will be described below. First, a pachinko machine 1 using a detection device according to an embodiment of the present invention will be described with reference to the front view of FIG. The detection device of the embodiment is incorporated in the pachinko ball firing device 30 of the pachinko machine 1.

As shown in FIG. 1, a metal frame 3 is provided around an opening of a front frame 2 formed in a frame shape of the pachinko machine 1, and a glass door frame 4, a front plate 5 and Are provided to be freely opened and closed. Behind the glass door frame 4, a game board 6 removably attached to a game board fixed frame (not shown) fixed to the back surface of the front frame 2 is provided. On the front surface of the game board 6, a guide rail 8 for guiding a pachinko ball is planted in a substantially circular shape, and a game area 9 is formed in a region surrounded by the guide rail 8.

At the approximate center of the game area 9, a variable winning device 10 is provided. The variable winning device 10 has a pair of open / close wing pieces 11a and 11b, and holds the open / close wing pieces 11a and 11b under a certain condition for a predetermined time (for example, 30
Seconds) or until a certain number (for example, 10)
Opening is performed until a prize is won, and such an open state is repeated several times (for example, 16 times) to perform a big hit operation for generating a large amount of prize balls in a short time. A jackpot lamp 1a is provided on the back of the variable prize winning device 10. By blinking the lamp 1a during the jackpot operation,
The fact that a jackpot operation different from a normal game rule is being performed is visually displayed to the player.

A variable display 12 composed of a plurality of digital displays is formed below the variable winning device 10, and its display mode is such that pachinko balls are provided at starting winning openings 13a to 13c provided below the game area 9. Starts to change when a prize is won, and stops when a stop switch 14 provided on the front frame 2 is pressed or a predetermined time (for example, 5 seconds) elapses. Then, the display mode of the variable display 12 at the time of the stop is determined in a predetermined display mode (for example,
When the number is the same (three digits), the variable winning device 10 executes the big hit operation.

Further, in the game area 9, in addition to the above-mentioned variable winning device 10 and starting winning ports 13a to 13c, general winning ports 15a to 15d are provided. An out port 16 is formed for guiding a pachinko ball that has not been won.

On the surface of the front plate 5, premium balls (pachinko balls) paid out by the generation of winning balls are stored preferentially.
Further, an upper plate 18 for guiding the pachinko ball to the firing position is attached. Also, two lamps 1b,
1c is buried, and a state in which the player has started playing the game with the pachinko machine 1 or a game state in which cheating has been performed is explicitly displayed.

In addition, below the front frame 2, a firing intensity adjustment handle 20 operated by a player is projected and fixed. An adjustment lever X for adjusting the resilience of the pachinko ball is rotatably provided on the firing intensity adjustment handle 20. The adjusting lever X is formed of a metal annular member, and as described later, a pachinko ball firing device 30 is provided.
Of the circuit elements constituting the parallel resonance circuit 345 of FIG. Further, the firing intensity adjustment handle 20 is provided with a single shot switch 22. This one-shot switch 22
When this is operated, the solenoid clutch 4
8 is operated to interrupt the transmission of rotation of the pachinko ball firing motor, thereby interrupting the firing of pachinko balls. Note that a similar function can be realized by adopting a configuration in which the motor is stopped.

Below the front frame 2 and beside the firing intensity adjusting handle 20, a lower plate 23 for storing a premium ball to be paid out when the upper plate 18 is full is attached.

Next, the structure of the pachinko ball firing device 30 disposed on the back of the pachinko machine 1 at the position where the firing strength adjusting handle 20 is mounted will be described with reference to FIG. As shown in the figure, on the rear surface of the mounting position of the firing strength adjusting handle 20, a firing motor 32 composed of a stepping motor and a ball firing mechanism 40 driven by the rotational force of the firing motor 32 are provided.

The ball firing mechanism 40 includes a coil spring 42, a hitting rod 44 urged by the coil spring 42, a locking lever 46 which causes the hitting rod 44 to perform a hitting operation of a pachinko ball by a cam mechanism (not shown), and the like. It is a well-known thing.
When the firing motor 32 rotates, the rotation of a cam mechanism (not shown) first causes the locking lever 46 to pull the striking rod 44 leftward in the figure against the coil spring 42. Along with this, the coil spring 42 gradually expands. When the firing motor 32 rotates by a predetermined angle, the cam mechanism and the locking lever 46 are rotated.
Is released, and the striking rod 44 attempts to return to the original position at a stretch by the force of the coil spring 42, and at that time, hits the pachinko ball. The strength of the striking rod 44 striking the pachinko ball is determined by the state of extension of the coil spring 42 when the striking rod 44 returns, that is, the position at which the locking lever 46 is unlocked.
This position corresponds to the adjustment lever X of the firing intensity adjustment handle 20.
In the end, the pachinko ball is fired with the strength corresponding to the position of the adjustment lever X. When the single-shot switch 22 is operated, the transmission of the rotation of the firing motor 32 is interrupted.
By appropriately operating No. 2, it is also possible to use a single shot of a pachinko ball.

When the single-shot switch 22 is not operated, one pachinko ball is fired at a rate of one rotation of the firing motor 32. The strength of firing a pachinko ball is proportional to the amount of rotation of the adjustment lever X. In addition, one-shot switch 2
By operating No. 2, it is possible to make the firing of the pachinko balls spontaneous and sporadic while maintaining the strength of firing the pachinko balls.

The control of the rotation speed of the firing motor 32 for determining the firing state of the above-described pachinko ball firing is executed by a control circuit 34 arranged near the firing motor 32. FIG. 3 shows an electric circuit block diagram of the pachinko machine 1 centered on the pachinko ball firing device 30 including the control circuit 34, the firing motor 32, and the single-shot switch 22.

As shown in the figure, the control circuit 34 is composed mainly of a one-chip microcomputer (hereinafter referred to as MPU) 341 in which peripheral circuits are housed in one chip. That is, the MPU 341 has a built-in CPU serving as a core, a ROM storing various programs to be described later, and a timer system for measuring a real time from a clock signal of the clock circuit 342 and for temporarily storing information.
It has an external circuit of the AM and MPU 341 and an input / output port for supporting input / output of various information. Also, MP
U341 is a port PU to which an analog signal can be directly input.
, And can be input while converting an analog signal directly into a digital signal at a predetermined resolution (here, 8 bits).

The driver circuit 343 includes a monitor lamp L1.
A large power consumption load such as L3, solenoid clutch 48 and firing motor 32 is driven based on a control signal from MPU 341. Eight bits corresponding to control signals output from output ports PO1 to PO8 of MPU 341 are provided. Generates a signal. Among them, the 4-bit output signal of the driver circuit 343 is output to the connector CN1 via the current limiting resistors R1 to R4. The power supply voltage Vc (28 [V]) is also output to the connector CN1, and the monitor lamps L1 to L3 and the solenoid clutch 4 which receive the power supply voltage Vc via the connector CN1.
8 turns on or operates when the 4-bit output signal of the driver circuit 343 becomes low level.

The monitor lamps L1 to L3 indicate the operation mode of the control circuit 34, and are used to display various types of information such as the type of the control circuit 34 and the type of error when an error occurs.

On the other hand, another 4-bit output signal of the driver circuit 343 is directly used as an excitation signal for the firing motor 32. The firing motor 32 receives the excitation signal and the power supply voltage Vc via the connector CN2. MP
The U341 can control the rotation of the firing motor 32 by controlling the excitation signal. Note that the Zener diode ZD1 connected between the driver circuit 343 and the power supply Vc is for absorbing a surge caused by the L load.

The four input ports PI1 to PI1 of the MPU 341
The PI 4 is used to change the operating conditions of the MPU 341. The control program to be burned into the ROM of the MPU 341 of the present embodiment includes the input ports PI1 to PI
4 (high or low level), and is designed in advance to change operating conditions such as a branch condition, a control target, a control amount, and a control timing according to the result. In the control circuit 34, the connection points S1 to S4 and one of the connection points S1 to S4 are arranged close to each of the connection points S1 to S4 so that the states of the input ports PI1 to PI4 can be easily set. ]), An adjustment circuit 344 composed of two pairs of connection points SA and SB, the other of which is connected to the ground, is patterned. The above input port P
I1 to PI4 are connected to a connection point S of the adjustment circuit 344.
1 to S4, respectively, and the connection status between the connection points S1 to S4 of the adjustment circuit 344 and the connection points SA and SB is input. The adjustment circuit 3 shown in FIG.
Reference numeral 44 denotes a circuit example in which all the connection points S1 to S4 are connected to the connection point SA on the power supply Vcc side.

The other input port PIS of the MPU 341 is a port for detecting the operating state of the single-shot switch 22, and is connected to the single-shot switch 22 via a chattering removing integration circuit including resistors R5 and R6 and a capacitor C1, and a connector CN3. Is done. Since this signal line is pulled up by the resistor R7, an "H" level signal is input to the input port PIS unless the single-shot switch 22 is pressed. On the other hand, when the single switch 22 is pressed, the signal to the input port PIS changes to “L” level, and the operation state of the single switch 22 is determined. In addition,
The diode D1 is interposed for protection.

The rectangular wave output from the output port PS of the MPU 341 has a time constant τ (= R) due to the integrating action of the resistor R10 (resistance value R) and the capacitor C2 (capacitance value C).
C) Capacitor C3 to cut DC component
Is input to the parallel resonance circuit 345 via the. Here, the parallel resonance circuit 345 is a parallel-type resonance circuit composed of a coil L and a capacitance component of the adjustment lever X connected via a capacitor C4 and a resistor R11. In order to facilitate the connection with the connector, the connector CN4 is separated and used. The circuit constants of the constituent elements of the parallel resonance circuit 345 including the adjustment lever X are determined so as to show the sharpest resonance state when the player is in a non-contact state with the adjustment lever X.

The output signal of the output port PS has its cycle T changed within a predetermined range as shown in FIG. 4, and is controlled by the MPU 341 so that the parallel resonance circuit 345 becomes an AC power supply having a plurality of discrete frequencies. .

First, at the time of initial processing at the time of power-on of the MPU 341, a predetermined value B is soft-set in a compare register of a built-in timer system. On the other hand, this timer system is provided with a free running counter that operates independently of the operation of the MPU 341. Each time the counter value matches a predetermined value B set in a compare register, that is, a predetermined time (hereinafter, referred to as a “time counter”). The output port VREFE is inverted to a low level every Tb. As shown in FIG. 3, since this output port VREFE is connected to the interrupt request port IRQ of the MPU 341, the MPU 341 receives a negative logic interrupt request signal every reference time Tb, and repeatedly starts interrupt processing. Will do. The interrupt processing executed here is an output control program for determining a signal output timing from the output port PS. The output signal of the output port PS is sequentially inverted with the elapse of a predetermined switching time Tc. The variable m is gradually increased or decreased so that Tc becomes 1 / m of the reference time Tb (m is an integer and 1 ≦ m ≦ y). That is,
With the output control program, an AC signal having a cycle shorter than the reference time Tb can be output from the output port PS while using the reference time Tb as a reference.

In this way, discrete parallel AC signals of a plurality of frequencies simulated by the output control program are applied to the parallel resonance circuit 345. The input port PU of the MPU 341 is used to detect and store the impedance value of the parallel resonance circuit 345 under the condition. Therefore, the terminal voltage of the parallel resonance circuit 345 is
5 and is half-wave rectified by a diode D2, and is connected to a resistor R12 and a capacitor C6.
And the input port PU
Is input to Therefore, a voltage signal proportional to the magnitude of resonance of the parallel resonance circuit 345 is input to the input port PU. The input port PU is a port to which an analog signal can be input. Note that a resistor R13 is interposed between the signal line to the input port PU and the ground line for discharging the charge stored in the capacitor C6.

In addition, the control circuit 34 includes an MPU 341
Resistors R20 and R21 for delaying the reset timing of the power supply Vcc by a predetermined time from the rise of the power supply Vcc.
An integration circuit 346 including the capacitors C20 and C21 and the diode D10 is formed.
Connected to ET port. In addition, the power supplies Vc, Vcc
Power supply circuit 34 composed of a diode full-wave rectifier circuit, a smoothing circuit, a voltage stabilizing circuit using a Zener diode, and the like.
7 are formed.

The pachinko ball firing device 30 of the present embodiment configured as described above operates as follows. FIGS. 5 and 6 are a flowchart of a contact determination routine which is a part of the main program stored in the built-in ROM of the MPU 341 and an operation explanatory diagram thereof.

When the processing of the contact determination routine is started, the MPU 3
41 reads the switching time Tcn of the signal currently output from the output port PS (the subscript n indicates data at the time of executing the current contact determination routine) (step 500), and then performs this switching. The terminal voltage data ZDn of the parallel resonance circuit 345 at the time Tcn is input from the input port PU (Step 502). Next, it is determined whether the current switching time Tcn matches the maximum value (= reference time Tb) or the minimum value (Tb / y) of the switching time (step 504), and the switching time Tcn is still set to the maximum value or the minimum value. When it is determined that they do not match, that is, when it is determined that the switching time Tc is in a gradual increase or a gradual decrease state, the processing shifts to the following terminal voltage data storage and maximum value update processing (steps 506 to 510). .

In step 506, processing for storing terminal voltage data is performed. In this process, the terminal voltage data ZDn obtained by executing the current contact determination routine is stored in association with the switching time Tcn. Furthermore,
Processing for updating the maximum value of the terminal voltage (steps 508 to 5
10). This processing compares the magnitude of the current terminal voltage data ZDn with the magnitude of the terminal voltage data ZDn-1 stored by the previous execution of the present routine, and compares the current terminal voltage data ZDn with the previous data. Is exceeded, the terminal voltage data ZDn is set in the variable Zmax.

By repeating the above steps 500 to 510, the parallel resonance circuit 34 shown in FIG.
The basic data for determining the resonance state of the MPU 34
1 in the RAM. That is, as the switching time Tc is gradually increased or decreased, the frequency of the AC power supply (reciprocal of the switching time) applied to the parallel resonance circuit 345 changes at regular intervals as illustrated. That is, the horizontal axis in FIG. 6 can be regarded as the frequency axis. By storing the terminal voltage data ZD until the switching time Tc reaches the maximum value (Tb) or the minimum value (Tb / y), resonance data in a predetermined frequency band can be obtained. The maximum value of the terminal voltage data ZD is stored as the value of the variable Zmax.

FIG. 6 shows, for convenience of explanation, resonance data (drawing symbol A) when the player is not in contact with the adjustment lever X, which is a constituent element of the parallel resonance circuit 345, and when the player is in contact with the adjustment lever X. , The resonance data (drawing code B) are obtained, but these resonance data are exclusively obtained, and the processing of steps 500 to 510 can obtain either one of the resonance data (A or B). .

After all the resonance data of the parallel resonance circuit 345 in the predetermined frequency band has been obtained, Tcn = Tb or Tc
= Tb / y, and the contact / non-contact determination processing in step 520 and thereafter is executed.

At the beginning of this processing, the previously stored y
Terminal voltage data ZD1, ZD2, ZD3,..., ZD
A magnitude relationship between y and its maximum value, 1/2 times the variable Zmax, is determined (step 520). And Zma
When the number of terminal voltage data ZD greater than x / 2 is
It is determined whether the value is equal to or less than a predetermined value DB (step 522).

Such a judgment process means judging the sharpness Q of the resonance of the parallel resonance circuit 345, as is clear from the explanatory diagram of FIG. That is, the adjustment lever X
The parallel resonance circuit 345 itself designed to exhibit the sharpest resonance state when the player is in a non-contact state has the maximum impedance at the resonance frequency as designed and has large terminal voltage data ZD (FIG. 6). ZD4) is obtained, and the impedance value sharply decreases at a frequency slightly deviated from the resonance frequency. However, when the player is in contact with the adjustment lever X, the parallel resonance circuit 34
The resonance state of No. 5 is greatly distorted from the design time, and not only the maximum impedance Zmax at the resonance frequency becomes small, but also the impedance change at a frequency slightly shifted from the resonance frequency becomes dull. Therefore, the number of terminal voltage data ZD exceeding Zmax / 2 is extremely small when the player is in the non-contact state with the adjustment lever X, and extremely large when the player is in the contact state. According to the example shown in FIG. 6, the terminal voltage data ZD exceeding Zmax / 2 at the time of non-contact is “3”, and that at the time of contact is “6”.

Accordingly, when it is determined in step 522 that the value is “true”, that is, when the number of terminal voltage data ZD equal to or more than Zmax / 2 is equal to or less than the predetermined value DB,
The flag F for non-contact determination is reset to "0" and its state is confirmed (step 524), and the terminal voltage data ZD and the variable Zma so far are determined for the next contact determination processing.
x is deleted (step 526), and this routine ends. On the other hand, when it is determined that the value is “false” in step 522, the flag F is set to “1” (step 5).
28) Similarly, terminal voltage data and the like are erased (step 530), and this routine ends.

The contact / non-contact state of the adjustment lever X confirmed as the set / reset state of the flag F in this manner is determined by other routines of the main program, for example, a motor drive routine for controlling the rotation of the firing motor 32. Needless to say, it is used for various controls of the pachinko machine 1 such as being used.

According to the pachinko ball shooting device 30 incorporating the detection device of the present embodiment configured as described above, the following effects can be obtained. In this embodiment, a parallel resonance circuit 345 having a simple circuit configuration including the inductance of the coil L and the capacitance of the adjustment lever X is employed in order to detect a game state in which the player holds the adjustment lever X. For this reason, the constituent circuit elements of the whole pachinko ball launching device 30 are largely omitted, and the device can be configured to be small and inexpensive. Further, it is not necessary to perform any circuit adjustment such as the amplification factor and the feedback phase as in the conventional oscillation circuit, which simplifies the manufacturing process and enables mass production of products with stable quality.

The determination as to whether or not the player is holding the adjustment lever X is made by comparing a large number of terminal voltage data ZD with a half value of Zmax, which is the maximum value thereof. Numerical differences ("3" shown in FIG. 6,
"6"). Therefore, the accuracy of the determination is remarkably improved as compared with the conventional binary determination of whether or not the oscillation circuit is oscillating.

Further, the pachinko ball firing device 30 employs a firing motor 32 composed of a stepping motor that can be directly driven by the MPU 341 as a power source for firing a pachinko ball. For this reason, compared with the conventional large AC motor which requires a special electric circuit for starting, the pachinko ball firing device 30 does not need to route an AC power line, and can be configured to be small. Possible.

As described above, since the pachinko ball shooting device 30 incorporating the detection device of this embodiment can be configured extremely easily and in a small size, the shooting motor 32 and the control circuit 34 are separately formed as shown in FIG. Instead, they can be integrally configured. In addition, when the control circuit 34 and the firing motor 32 are integrally formed in this manner, since the whole occupied volume is extremely small, all of them can be built in the firing intensity adjustment handle 20. 1. Other components on the back of the launch intensity adjustment handle 20;
For example, a card reader for a card-type pachinko ball lending machine can be provided.

The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be carried out in various modes without departing from the gist of the present invention. is there. For example, in this embodiment, the holding state of the adjustment lever X is detected by the parallel resonance circuit 345, but a series resonance circuit may be employed instead. Further, in the present embodiment, the value of the terminal voltage data ZD is compared in magnitude with the 1/2 value of the variable Zmax, but may be compared with various values such as the 1/2 value and 1/3 value of the variable Zmax. . Further, the final contact / non-contact judgment is made by a predetermined value D.
The predetermined value DB is not required to be a constant value, but a plurality of values can be selected according to the installation status of the pachinko machine 1 or the value can be updated by learning control. Alternatively, the configuration may be such that errors due to environmental changes and aging are eliminated. Further, the parallel resonance circuit 345
Although the example in which the reference time Tb is software-divided and the frequency is scanned as the AC power source has been described, those skilled in the art can scan the frequency by various other methods. For example, an interval Tb at which an interrupt is generated at the interrupt request port IRQ may be changed, and the frequency may be changed using the interrupt interval.

In the present embodiment, the circuit constants are designed so that the parallel resonance circuit 345 exhibits the sharpest resonance state when the player does not hold the adjustment lever. May be designed so that the sharpest resonance state can be obtained in a state where the user grips the adjustment lever X.

In the illustration of the resonance state illustrated in FIG. 6, the change of the switching time Tc is roughened to increase the sampling interval in the resonance state for convenience of explanation, but the sampling interval is narrowed. It will be clear that the contact / non-contact judgment accuracy is further improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
Configuration applied to devices other than pachinko gaming devices, such as vending machines and devices that detect the operation status of switches of various devices,
Of course, the present invention can be implemented in various modes without departing from the gist of the present invention, such as a configuration in which the state of a plurality of detection units is detected by a single MPU 341.

[0050]

As described above, according to the detection device of the present embodiment, it is possible to accurately determine the contact state of a high-impedance object by using a resonance circuit having a simple structure. Wiring routing is omitted, and the occupied volume can be reduced. Further, the judgment is made comprehensively from a large number of impedance data, and the contact / non-contact state can be detected with high accuracy. Further, since the detection process is completed by a simple data size comparison, the time required for the process is reduced, and excellent responsiveness is exhibited.

[Brief description of the drawings]

FIG. 1 is a front view of a pachinko machine provided with a detection device according to an embodiment of the present invention.

FIG. 2 is a partial back view of the pachinko machine.

FIG. 3 is an electric circuit block diagram centering on a pachinko ball firing device 30 incorporating a detection device according to an embodiment.

FIG. 4 is an explanatory diagram of a signal output from an output port PS.

FIG. 5 is a flowchart of a contact determination routine executed by the pachinko ball firing device 30.

FIG. 6 is an explanatory diagram of a contact / non-contact determination process executed in the contact determination routine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pachinko machine 2 ... Front frame 3 ... Gold frame 4 ... Glass door frame 5 ... Front plate 6 ... Game board 8 ... Guiding rail 9 ... Game area 10 ... Variation winning device 11a, 11b ... Open / close wing piece 12 ... Variable display 13a-13c ... Start winning opening 14 ... Stop switch 15a-15d ... General winning opening 16 ... Out opening 18 ... Upper plate 20 ... Laser intensity control handle 20 ... Launch handle 22 ... Single switch 23 ... Lower plate 30 ... Pachinko ball firing Device 32: Launching motor 34: Control circuit 40: Ball launching mechanism 42: Coil spring 44: Hitting rod 46: Clutch 46: Locking lever 48: Solenoid clutch 341: MPU 342: Clock circuit 343: Driver circuit 344: Adjust circuit 345: parallel resonance circuit 346: integration circuit 347: power supply circuit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01V 3/08 A63F 7/02 308

Claims (1)

(57) [Claims] A high impedance to the detection unit is obtained by using a circuit component of a resonance circuit driven by an output signal from a microprocessor as a detection unit and detecting a resonance state of the resonance circuit by the microprocessor. A detection device that determines a contact state of an object, wherein the microprocessor simulates a plurality of discrete alternating-current power supplies in a predetermined frequency band by sequentially inverting the output signal based on a certain rule, Frequency scanning means for driving the resonance circuit at respective frequencies; impedance detection storage means for detecting and storing impedance values of the resonance circuit driven by the frequency scanning means for the plurality of frequencies; and the detected impedance. Maximum value determining means for determining the maximum value of 1 / n (n of the maximum value of the impedance
> 1) A comparison means for comparing the judgment reference value with the impedance value of the resonance circuit at the plurality of frequencies stored by the impedance detection storage means, and a comparison result by the comparison means. A determination unit for determining contact or non-contact including the proximity state of the high impedance object to the detection unit.