JPH06214041A - Detecting device - Google Patents

Abstract

PURPOSE:To provide a detecting device for detecting the contact/non-contact state of a high impedance object which has an easy and inexpensive circuit structure and can perform a highly precise judgment while dispensing with complicated circuit regulation. CONSTITUTION:A control circuit 34 is constituted with a MPU 341 as a center, the output signal of an output port PS is controlled to be an AC power source of discrete plural frequencies to a parallel resonance circuit 345. The input port PU of the MPU 341 is used to detect the terminal voltage of the parallel resonance circuit 345, and this value is stored over a determined frequency band. The stored terminal voltage data group is compared with a judgment standard value which is 1/n (n>1) times the maximum value of the terminal voltage data, and the contact/non-contact of a player to a regulating lever X which is the constituting element of the parallel resonance circuit 345 is judged from the number of data exceeding the judgment standard value.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

[0003]

However, the conventional detecting device has the following problems. An LC oscillation circuit, which is a simple high-frequency oscillation circuit, such as a Colpitts-type or Hartley-type oscillation circuit, is generally used as an oscillation circuit in which oscillation is continued or stopped by contact with a high-impedance object. Although these are simple oscillation circuits, since they have a feedback circuit, the number of their 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 is actually extremely difficult to accurately judge contact / non-contact of a high-impedance object such as a human body by binary judgment as to whether or not the oscillation circuit is oscillating. That is, the impedance value presented by the human body varies considerably depending on the humidity change of the environment, the sweating state of the human body, the age, constitution, etc., and further varies depending on the state of contact with the detection part (holding, touching, etc.).
It was extremely difficult to judge non-contact with a certain accuracy or more.

The present invention solves these problems, has a simple and inexpensive circuit configuration with a small number of parts, and eliminates the need for complicated circuit adjustments, etc., while a high-impedance object comes into contact with the detection unit (including a proximity state). ) Or a non-contact state, the detection device capable of highly accurately determining the state is provided, and has the following configuration.

[0006]

According to another aspect of the present invention, there is provided a detection device which utilizes a circuit component of a resonance circuit driven by an output signal from a microprocessor as a detection unit and which causes the resonance state of the resonance circuit by the microprocessor. Is a detection device for determining the contact state of a high impedance object with respect to the detection unit by detecting the, the microprocessor, by sequentially inverting the output signal based on a certain rule, discrete in a predetermined frequency band. Frequency scanning means for simulating an alternating-current power supply having a plurality of frequencies and driving the resonance circuit at each frequency, and impedance values of the resonance circuit driven by the frequency scanning means are detected and stored for the plurality of frequencies. The impedance detection storage means and the maximum value of the detected impedance are determined. And a maximum value determination unit that determines 1 / n (n> 1) times the maximum value of the determined impedance as a determination reference value, and the determination reference value and the plurality of frequencies stored by the impedance detection storage unit. Comparing means for comparing the impedance value of the resonance circuit with that of the resonant circuit, and judging means for judging contact or non-contact including the proximity state of the high impedance object to the detection unit based on the comparison result by the comparing means. And

[0007]

In the detecting device of the present invention configured as described above, the frequency scanning means of the microprocessor imitates a discrete AC power source having a plurality of frequencies, and the resonance circuit can be driven 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 means. The maximum value determination means determines the maximum value.

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

[0009]

Embodiments In order to further clarify the structure and operation of the present invention described above, an embodiment in which the detection device of the present invention is applied to a pachinko ball launching 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 launching 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 and a front plate 5 are provided in the metal frame 3. Is openable and closable. Behind the glass door frame 4, a game board 6 detachably attached to a game board fixing frame (not shown) fixed to the back surface of the front frame 2 is arranged. 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 an area surrounded by the guide rail 8.

A variable winning a prize device 10 is provided almost at the center of the game area 9. The variable winning device 10 has a pair of open / close blades 11a and 11b, and these open / close blades 11a and 11b are kept under a constant condition for a predetermined time (for example, 30
Seconds) or a fixed number (for example, 10)
The jackpot operation is performed in which the winning state is released until a prize is won, and such an open state is repeated several times (for example, 16 times) to generate a large number of winning balls in a short time. Further, a jackpot lamp 1a is provided on the back surface of the variable winning device 10, and by blinking the lamp 1a during the jackpot operation,
It is displayed to the player that the jackpot operation different from the normal game rule is being performed.

A variable display 12 composed of a plurality of digital displays is formed below the variable winning device 10, and its display mode is a pachinko ball at starting winning openings 13a to 13c provided below the game area 9. Starts changing when a prize is won, and stops when the stop switch 14 provided on the front frame 2 is pressed or when a predetermined time (for example, 5 seconds) elapses. Then, the display mode of the variable display 12 at the time of this stop is a predetermined display mode (for example,
When the numbers are the same (three digits), the variable winning device 10 is designed to execute a jackpot operation.

Further, in the game area 9, general prize holes 15a to 15d are provided in addition to the variable prize device 10 and the starting prize holes 13a to 13c, and any of the prize devices or prize holes described above is provided. An out port 16 is formed through which a pachinko ball that has not won a prize is guided.

On the surface of the front plate 5, prize balls (pachinko balls) paid out by the generation of winning balls are preferentially stored,
Moreover, the upper plate 18 for guiding the pachinko ball to the firing position is attached. The front frame 2 has two lamps 1b,
1c is embedded, and a state in which the player has started playing a game on the pachinko machine 1 or a game state in which an illegal act has been performed is explicitly displayed.

In addition to this, below the front frame 2, a firing strength adjusting handle 20 that is operated by the player is fixed in a protruding manner. The firing strength adjusting handle 20 is rotatably provided with an adjusting lever X for adjusting the elastic force of a pachinko ball. The adjusting lever X is composed of a metal annular member, and is used for pachinko ball launching device 30 as will be described later.
It is also used as a part of the circuit element that constitutes the parallel resonance circuit 345. Further, the firing intensity adjusting handle 20 is provided with a single shot switch 22. This one-shot switch 22
When this is operated, the solenoid clutch 4 described later
8 is operated to interrupt the transmission of the rotation of the pachinko ball firing motor to interrupt the pachinko ball firing. The same function can be realized by adopting a configuration in which the motor is stopped.

Below the front frame 2 and to the side of the firing strength adjusting handle 20, there is attached a lower plate 23 for storing a prize ball which is further paid out when the upper plate 18 is full.

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

The ball firing mechanism 40 includes a coil spring 42, a ball striking rod 44 urged by the coil spring 42, and a locking lever 46 which causes the ball striking rod 44 to perform a ball striking motion of a pachinko ball by a cam mechanism (not shown). It is well known.
When the firing motor 32 rotates, the locking lever 46 first pulls the ball striking rod 44 against the coil spring 42 in the leftward direction by rotation of a cam mechanism (not shown). 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
The ball hitting rod 44 tries to return to its original position at once by the force of the coil spring 42, and at that time, hits the pachinko ball. The strength with which the batting rod 44 hits a pachinko ball is determined by the extension state of the coil spring 42 when the batting rod 44 returns, that is, the position where the locking lever 46 is unlocked.
This position is the adjustment lever X of the firing intensity adjustment handle 20.
Since it is determined by the amount of rotation of the pachinko ball, the pachinko ball is eventually fired with a strength corresponding to the position of the adjusting lever X. When the single-shot switch 22 is operated, the rotation transmission of the firing motor 32 is cut off.
By appropriately operating 2, it is possible to use it to shoot a pachinko ball in a single shot.

When the single-shot switch 22 is not operated, the pachinko balls are fired once per one revolution of the firing motor 32. The strength with which a pachinko ball is fired is proportional to the amount of rotation of the adjustment lever X. Also, single-shot switch 2
By manipulating 2, the pachinko ball firing strength can be kept the same, and the pachinko ball firing can be either sporadic or sporadic.

The rotation speed control of the firing motor 32 for determining the firing state of the pachinko ball firing described above is executed by the control circuit 34 arranged in the vicinity of the firing motor 32. An electric circuit block diagram of the pachinko machine 1 centering on the pachinko ball launching device 30 including the control circuit 34, the launch motor 32, and the single-shot switch 22 is shown in FIG.

As shown in the figure, the control circuit 34 is mainly composed of a one-chip microcomputer (hereinafter referred to as MPU) 341 in which peripheral circuits are contained in one chip. That is, the MPU 341 has a built-in CPU that serves as a core, a ROM that stores various programs to be described later, and a timer system that measures a real time from a clock signal of the clock circuit 342 and that temporarily stores information.
It incorporates an external circuit of the AM and MPU 341 and an input / output port that supports input / output of various information. Also, MP
U341 is a port PU that can directly input analog signals.
With a predetermined resolution (here, 8 bits), an analog signal can be directly input while being converted into a digital signal.

The driver circuit 343 has a monitor lamp L1.
Through L3, solenoid clutch 48, firing motor 32, and the like which drive a large power consumption based on a control signal from MPU 341, and 8 bits corresponding to the control signal output from output ports PO1 to PO8 of MPU 341. Generate the signal. Of these, 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 this 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 are lamps that 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, the other 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 U 341 can control the rotation of the firing motor 32 by controlling this excitation signal. 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 condition of the MPU 341. The control program burned in the ROM of the MPU 341 of this embodiment is the input ports PI1 to PI.
It is designed in advance so as to detect the state (4) (high or low level) and change the operation conditions such as the branch condition, the controlled object, the controlled variable, and the control timing according to the result. In order to easily set the states of the input ports PI1 to PI4, in the control circuit 34, the connection points S1 to S4 and the connection points S1 to S4, which are arranged close to each other, are connected to the power supply Vcc (5 [V ], And the adjusting circuit 344 is formed by patterning, and the adjusting circuit 344 is composed of two pairs of connection points SA and SB, the other of which is connected to the ground. Input port P above
I1 to PI4 are connection points S of the adjusting circuit 344.
1 to S4, and the connection status between the connection points S1 to S4 and the connection points SA and SB of the adjustment circuit 344 is input. The adjustment circuit 3 shown in FIG.
Reference numeral 44 shows an example of a circuit 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 operation status of the one-shot switch 22, and is connected to the one-shot switch 22 via a chattering elimination integrating circuit composed of resistors R5 and R6 and a capacitor C1 and a connector CN3. To be 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 one-shot switch 22 is pressed. On the other hand, when the one-shot switch 22 is pressed, the signal to the input port PIS changes to the “L” level, and the operation state of the one-shot switch 22 is determined. In addition,
The diode D1 is provided for protection.

The rectangular wave output from the output port PS of the MPU 341 has a time constant τ (= R) due to the integral action of the resistor R10 (resistance value R) and the capacitor C2 (capacitance value C).
C) Capacitor C3 that is annealed only and cuts the direct current component
Is input to the parallel resonance circuit 345 via. Here, the parallel resonance circuit 345 is a parallel type resonance circuit composed of the coil L and the capacitance component of the adjustment lever X connected via the capacitor C4 and the resistor R11, and the adjustment lever X at a separated position. In order to facilitate the connection with the connector CN4, the connector CN4 is used. The circuit constants of the constituent elements of the parallel resonance circuit 345 including the adjustment lever X are determined so that the sharpest resonance state is exhibited when the player is not in contact with the adjustment lever X.

The output signal of the output port PS has its period T changed within a predetermined range as shown in FIG. 4, and is controlled by the MPU 341 so as to be a discrete multiple-frequency AC power source for the parallel resonant circuit 345. .

First, at the time of initial processing when the MPU 341 is powered on, the predetermined value B is soft set in the compare register of the 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, and each time the counter value matches the predetermined value B set in the compare register, that is, for a fixed time (hereinafter The output port VREFE is inverted to the low level every Tb. As shown in FIG. 3, since the output port VREFE is connected to the interrupt request port IRQ of the MPU 341, the MPU 341 will accept a negative logic interrupt request signal at each reference time Tb, and repeatedly start interrupt processing. Will be done. The interrupt processing executed here is an output control program that determines the signal output timing from the output port PS, and sequentially inverts the output signal of the output port PS with the elapse of a predetermined switching time Tc, and the switching time thereof. The variable m is gradually increased or gradually 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, it is possible to output an AC signal having a cycle shorter than the reference time Tb from the output port PS while using the reference time Tb as a reference.

In this way, the parallel resonance circuit 345 is applied with discrete AC signals of a plurality of frequencies simulated by the output control program. Then, the input port PU of the MPU 341 is used to detect and store the impedance value of the parallel resonant circuit 345 under that condition. For this reason, the terminal voltage of the parallel resonant circuit 345 is the capacitor C
After being AC coupled by 5, the diode D2 is half-wave rectified to form a resistor R12 and a capacitor C6.
Smoothed by the integration circuit according to
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 that can input an analog signal. A resistor R13 is provided between the signal line to the input port PU and the ground line for discharging the electric charge charged in the capacitor C6.

In addition to this, the control circuit 34 includes an MPU 341.
Resistors R20, R21 for delaying the reset timing of the power supply Vcc by a predetermined time from the rise time of the power supply Vcc,
The integrating circuit 346 including the capacitors C20 and C21 and the diode D10 is formed, and the RES of the MPU 341 is
Connected to ET port. In addition, the power sources Vc and Vcc
Is generated from an AC power supply (AC24 [V]), a power supply circuit 34 including a diode full-wave rectification circuit, a smoothing circuit, a voltage stabilizing circuit using a Zener diode, and the like.
7 are formed.

The pachinko ball launching device 30 of the present embodiment configured as described above operates as follows. FIG. 5 and FIG. 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 process of the contact judgment routine is started, the MPU 3
Reference numeral 41 reads the switching time Tcn of the signal currently output from the output port PS (subscript n indicates the data at the time of this contact determination routine execution) (step 500), and then this switching The terminal voltage data ZDn of the parallel resonant circuit 345 at time Tcn is input from the input port PU (step 502). Next, it is judged 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 maximum value or the minimum value is still set. When it is determined that they do not match, that is, when it is determined that the switching time Tc is in the gradually increasing or gradually decreasing state, the process proceeds to the following storage of terminal voltage data and maximum value update processing (steps 506 to 510). .

At step 506, a process of storing the 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) is performed. In this process, the terminal voltage data ZDn of this time is compared with the terminal voltage data ZDn-1 stored by the execution of this routine last time, and the terminal voltage data ZDn of this time is compared with the previous data. When it exceeds, the terminal voltage data ZDn is set in the variable Zmax.

By repeating the above steps 500 to 510, the parallel resonant circuit 34 as shown in FIG. 6 is obtained.
Basic data for judging the resonance state of MPU34
No. 1 RAM. That is, as the switching time Tc is gradually increased or decreased, the frequency of the AC power supply applied to the parallel resonant circuit 345 (the reciprocal of the switching time) changes at regular intervals as shown in the figure. That is, the horizontal axis of FIG. 6 can be regarded as the frequency axis. By storing the terminal voltage data ZD until the switching time Tc reaches its maximum value (Tb) or 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.

In FIG. 6, for convenience of explanation, the resonance data (drawing symbol A) when the player is in a non-contact state with the adjusting lever X, which is a constituent element of the parallel resonance circuit 345, and the contact state. Although both resonance data (drawing code B) are shown, these resonance data are exclusively obtained, and any one of these resonance data (A or B) is obtained by the processing of steps 500 to 510. .

After all the resonance data of the parallel resonance circuit 345 in the predetermined frequency band are obtained in this way, Tcn = Tb or Tc in the judgment processing of the step 504.
= Tb / y is determined, and the contact / non-contact determination processing of step 520 and thereafter is executed.

At the beginning of this process, the previously stored y
Terminal voltage data ZD1, ZD2, ZD3, ..., ZD
The magnitude relationship between y and the maximum value of the variable Zmax, which is ½, is determined (step 520). And Zma
The data number of the terminal voltage data ZD larger than x / 2 is
It is determined whether or not the value is equal to or less than a predetermined value DB (step 522).

As is clear from the explanatory view of FIG. 6, such a judgment process means to judge the sharpness Q of resonance of the parallel resonance circuit 345. That is, the adjustment lever X
The parallel resonance circuit 345 itself designed to exhibit the sharpest resonance state when the player is in the non-contact state has the maximum impedance at the resonance frequency as designed and has a large terminal voltage data ZD (see 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 largely collapses from the time of designing, and not only the maximum impedance Zmax at the resonance frequency becomes smaller but also the impedance change at the frequency slightly deviated from the resonance frequency becomes dull. Therefore, the number of the terminal voltage data ZD exceeding Zmax / 2 is extremely small when the player is in the non-contact state with the adjusting lever X, and conversely is 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 is “3” when not in contact, and is “6” when in contact.

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

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

According to the pachinko ball launching device 30 incorporating the detecting device of the present embodiment configured as described above, the following effects can be obtained. In order to detect the game state in which the player holds the adjustment lever X, the present embodiment employs 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. Therefore, the circuit elements of the pachinko ball launching device 30 as a whole are largely omitted, and the device can be made compact and inexpensive. Further, unlike the conventional oscillation circuit, no circuit adjustment such as amplification factor and feedback phase is required, which simplifies the manufacturing process and enables mass production of stable quality products.

Further, the judgment as to whether or not the player is gripping the adjusting 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, and it is clear. Numerical difference (“3” shown in FIG. 6,
"6"). Therefore, as compared with the conventional binary determination as to whether the oscillation circuit is oscillating, the accuracy of the determination is significantly improved.

Further, this pachinko ball launching device 30 employs a launching motor 32 which is a stepping motor which can be directly driven by the MPU 341 as a power source for launching a pachinko ball. Therefore, as compared with the conventional large-sized AC motor that requires a special electric circuit for starting, the pachinko ball launching device 30 does not need to be laid around the AC power line, and can be made compact. It will be possible.

Since the pachinko ball launching device 30 incorporating the detection device of this embodiment can be constructed extremely easily and in a small size, the launching motor 32 and the control circuit 34 are separately constructed as shown in FIG. Instead, it is possible to configure them integrally. Moreover, in the case where the control circuit 34 and the firing motor 32 are integrally configured in this manner, since the entire occupied volume thereof is extremely small, it is possible to incorporate all of them in the firing strength adjusting handle 20. Other components on the back of the firing strength adjusting handle 20
For example, a card reader of a card-type pachinko ball lending machine can be provided.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. is there. For example, in the present embodiment, the holding state of the adjusting lever X is detected by the parallel resonance circuit 345, but instead of this, a series resonance circuit may be adopted. Further, although the value of the terminal voltage data ZD is compared with the 1/2 value of the variable Zmax in the present embodiment, it may be compared with various values such as the 1/2 value and the 1/3 value of the variable Zmax. . Furthermore, the final contact / non-contact judgment is determined by a predetermined value D.
Although this is performed in comparison with B, the predetermined value DB does not have to be a constant value, and 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. It is also possible to adopt a configuration in which an error due to environmental changes or aging changes is eliminated. In addition, the parallel resonance circuit 345
Although an example in which the reference time Tb is divided by software to scan the frequency is shown as the AC power source, the person skilled in the art can scan the frequency by various other methods. For example, it is possible to change the interval Tb for generating an interrupt at the interrupt request port IRQ and use the interrupt interval to change the frequency.

Further, in the present embodiment, the circuit constant is designed so that the parallel resonance circuit 345 exhibits the sharpest resonance state when the player is not holding the adjusting lever, but a general player May be designed so that the sharpest resonance state can be obtained when the adjustment lever X is gripped.

In the explanatory view of the resonance state illustrated in FIG. 6, the change of the switching time Tc is made rough and the sampling interval of the resonance state is widened for the convenience of the description sheet, but the sampling interval is narrowed. It will be clear that this improves the accuracy of contact / non-contact judgment.

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 game machines, such as devices that detect switch operating states of vending machines and various devices,
Needless to say, the present invention can be implemented in various modes without departing from the scope of the present invention, such as a configuration in which the states of a plurality of detection units are detected by a single MPU 341.

[0050]

As described above, according to the detection apparatus 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, which results in complicated circuit adjustment and Wiring can be 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. Furthermore, since the detection process is completed by simply comparing the sizes of the data, the time required for the process is shortened and excellent responsiveness is exhibited.

[Brief description of 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 rear view of the pachinko machine.

FIG. 3 is a block diagram of an electric circuit centering on a pachinko ball launching device 30 incorporating the detection device of the 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 launching device 30.

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

[Explanation of symbols]

 1 ... Pachinko machine 2 ... Front frame 3 ... Gold frame 4 ... Glass door frame 5 ... Front plate 6 ... Game board 8 ... Guide rail 9 ... Game area 10 ... Variable winning device 11a, 11b ... Opening / closing blade 12 ... Variable display 13a to 13c ... Start winning port 14 ... Stop switch 15a to 15d ... General winning port 16 ... Out port 18 ... Upper plate 20 ... Firing strength adjusting handle 20 ... Firing 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 ... Ball striking 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

Claims (1)

[Claims] 1. A high impedance for the detection unit by using a circuit component of a resonance circuit driven by an output signal from the microprocessor as a detection unit and detecting the resonance state of the resonance circuit by the microprocessor. A detection device for determining a contact state of an object, wherein the microprocessor sequentially inverts the output signal based on a certain rule, thereby simulating a discrete multiple frequency AC power supply in a predetermined frequency band, Frequency scanning means for driving the resonance circuit at each frequency, 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 multiplying criterion value is used as a criterion value, and the comparing criterion value is compared with the impedance values of the resonant circuits at the plurality of frequencies stored by the impedance detecting and storing means, and the comparison result by the comparing means. And a determination unit that determines contact or non-contact including a proximity state of the high impedance object to the detection unit.