JPH0449436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pseudo-sound generating device capable of adding an engine-simulating sound to various power toys using a motor as a drive source.

"Prior Art" The present inventors first extracted a pulse corresponding to the rotational speed of a power system such as a drive shaft or a wheel, and based on the pulse signal, the idling sound of the engine was determined to be proportional to the rotational speed of the power system. This paper proposes a sound transmitting device for a powered toy that is configured to generate pseudo-sounds. (Utility Model Publication No. 60-39040) "Problems to be Solved by the Invention" However, in such conventional technology, the number of rotations from the power system such as the drive shaft or wheels is detected in pulses, and based on the pulse signal, the engine is simulated. Since it is configured to generate sound, it is possible to produce a change in the engine sound proportional to the rotation speed of the power system, specifically, a change in the engine sound when accelerating or decelerating the vehicle. However, it is impossible to produce a change in engine sound without changing the rotational speed of the power system, for example, a change in engine sound during gear change.

Further, in the above-mentioned conventional technology, a pulse oscillator is attached to a voltage-controlled variable frequency oscillator that generates a pulse train having a frequency corresponding to changes in the rotation speed, and when the power system is stopped rotating, the pulse oscillator is used to respond to idling noise. Since it is configured to output a pulse signal, the sound during idling is always in a steady state, making it impossible to produce sounds such as racing.

In view of the drawbacks of the prior art, the present invention creates pseudo-sounds that correspond to changes in engine speed, such as from revving to gear change while driving, in addition to pseudo-sounds that correspond to changes in engine speed from idling to driving. To provide a pseudo-sound generating device for a power toy that can produce a pseudo-engine sound that is even closer to the real thing and has a high sense of reality.

"Means for Solving the Problems" In order to achieve the technical problems, the present invention
Switching means 25 to 26, 75 to 76 for switching between idling and running states are provided on the transmitting device side, as well as at least an operating handle for forward and backward movement, and on the other hand, on the receiving device side, switching means 25 to 26, 75 to 76 for switching between idling and running states are provided, and on the other hand, on the receiving device side, ON/ OFF-controlled switching means 36, 86 and from OFF of the switching means
ON (from idling state to running state), from OFF
Integrating means 11 and 61 for integrating and blunting the DC voltage at the portions where the state changes from ON (running state to idling state), and means 9 for performing rapid charging and discharging of the blunted voltage change component;
12, 59, and 62, and is characterized in that it is configured to be able to generate an engine pseudo sound corresponding to the state change using the rapid discharge, and more preferably, the switching means is OFF.
(idling state), it is configured to be able to generate a pseudo sound corresponding to racing based on the signal obtained by operating the steering wheel for forward and backward movement, and on the other hand, when the switching means is in the ON state (running state). Furthermore, the present invention is characterized in that a pseudo sound corresponding to a gear change can be generated based on an acceleration or deceleration signal obtained by operating the forward/reverse steering wheel.

Incidentally, the switching means does not have to be constructed as an independent switching means, but can also be used as a power switch or the like.

Furthermore, as a preferred embodiment of the above technical means,
Switching means 36, 86 for creating an idling state by cutting off a drive signal guided to a drive motor of a power toy;
Means 353, 61 for changing the voltage level corresponding to the idling operation created by 6, and the means 353, 61 for changing the voltage level directly or after forming a sawtooth wave, for rapid charging or rapid discharging. without the pulse conversion means 14, 64.
(Means 10, Tr5, Tr6), it is possible to produce a change in the simulated engine sound equivalent to the engine revving sound during idling, which is even closer to the real thing and gives a high sense of realism. It is possible to create a simulated engine sound.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this example are as follows, unless otherwise specified.
This is not intended to limit the scope of the invention, but is merely an illustrative example.

FIG. 1 is a block diagram showing a circuit configuration according to an embodiment in which the present invention is applied to a radio-controlled power toy, particularly a radio-controlled car, in which A is a transmitting device that outputs a signal for driving the toy, and B is a power A receiving device built into the toy, C is the receiving device B
This is a control device for generating simulated engine sounds built into the engine.

As is well known, the transmitting device A includes an oscillation circuit 21 that oscillates a high frequency wave when a power switch is turned on, and a modulation circuit 22 that modulates the high frequency wave based on a control signal described later.
, a power amplification circuit 23 that amplifies the modulated high frequency and transmits it to the receiving device side, and a control pulse oscillation circuit 24 that outputs various drive pulse signals for forward/backward movement, right turn, and left turn. In particular, a one-shot pulse generator 25 is attached that oscillates a neutral pulse signal for switching between idling and running based on the ON-OFF operation of the changeover switch 26, and the neutral pulse signal is sent to the modulation circuit 22 side. The signal is guided and transmitted to the receiving device B side on a modulated high frequency wave.

Of the drive signals, the drive pulse signal for forward and backward movement is a signal whose pulse width is modulated by the modulation circuit 22 in response to acceleration/deceleration operations (including racing).

On the receiving device B side, the transmitted modulated high frequency signal is combined with the signal from the local oscillation circuit 32 in a mixing circuit 31, the intermediate frequency thereof is amplified in an amplifier circuit 33, and then the driving pulse is generated in a detection circuit 34. The signal and the neutral pulse signal are extracted and inputted to the control circuit 35.

The control circuit 35 converts the control signal extracted by the detection circuit 34 into a first signal, as shown in FIG.
The channel separation circuit 351 separates the signal, and the neutral pulse signal is input to the neutral pulse latch circuit 3.

On the other hand, among the drive pulse signals, the right/left turn signal is directly inputted from the second channel separation circuit 352 to the right/left turn servo circuit 38 to perform the right/left turn operation, but the acceleration/deceleration operation (including racing) is A correspondingly pulse-width-modulated forward/reverse signal is input to the forward/reverse servo circuit 37 via the switching circuit 36, and is also input to the channel separation circuit 35.
The pulse-width modulated forward/backward signal is integrated by the integrating circuit 353 on the output side of 2, and is input to the Miller integrating circuit 2 and the buffer amplifier 1 as a DC voltage signal proportional to the motor rotation speed.

The switching circuit 36 is configured to perform ON/OFF operation based on the inverted output signal from the neutral pulse latch circuit 3, and to guide a forward/reverse signal to the servo circuit 37 only when driving the power toy.

Next, the circuit configuration of the control device for generating engine pseudo-sound will be explained based on FIGS. 1, 3, and 4.

Buffer amplifier 1 consisting of operational amplifier OP1 has its output side connected to resistors R1 and R2 and capacitors C1 and C.
It is connected to the input side of a DC amplifier 13 via a two-stage integrating circuit 11 formed by FET Tr1, and is also bypassed between the input and output terminals of the integrating circuit 11 via a signal bypass circuit 10 consisting of FET Tr1. When the bypass circuit 10 is in operation, the output signal a from the buffer amplifier 1 bypasses the integrating circuit 11 and is guided directly to the DC amplifier 13.

The Miller integration circuit 2 consists of an operational amplifier OP2, a capacitor C3, and a resistor R3, and integrates the DC voltage signal and sends the output voltage signal d to the operational amplifiers OP3 and OP4 forming comparator circuits 4 and 4'.
It is configured to input to the + input terminal side of each of the + input terminals.

The comparison voltage generation circuit 6 is connected to a voltage dividing resistor R from the circuit power supply.
4, R5, and R6 are connected in series in triplicate, and a switching circuit 5 consisting of a switching transistor Tr2 is connected to the ground side of the operational amplifier OP, which constitutes the comparator circuits 4 and 4' during operation.
3. The configuration is such that comparison voltages e and f at a predetermined voltage level are applied to the negative input terminal side of OP4.

The comparator circuits 4 and 4' are connected in parallel to enable two gear changes from idling to high speed driving, and the comparison voltage is a DC voltage corresponding to high speed driving. The level is divided into three equal parts, and comparison voltages corresponding to 1/3 voltage level and 2/3 voltage level are respectively applied to the negative input terminal sides of operational amplifiers OP3 and OP4. It is possible to increase or decrease the number of comparator circuits 4, 4' depending on the number.

The neutral pulse latch circuit 3 is formed of a T-type flip-flop, and when no signal is input to the input side of the latch circuit 3, the inverted output signal is sent to the switching circuit 36 on the receiving device B side and the signal bypass circuit 10. The state in which the voltage is applied to the base side of FET Tr1 is maintained, and as a result, the switching circuit 36 on the receiver B side is turned off, signal transmission to the forward/reverse servo circuit is cut off, and the buffer amplifier becomes idling. 1, the output signal a is bypassed and guided to the DC amplifier 13.

When a signal is input to the input side of the latch circuit 3, the switching circuit 36 is turned on and the circuit enters the running state, and the bypass from the buffer amplifier 1 is released, and the output signal a is input to the integrating circuit 11, and the The non-inverted output signal from latch circuit 3 is
The voltage is applied to the base side of the transistor Tr2 constituting the switching circuit 5 connected to the ground side of the comparison voltage generating circuit 6, and the operational amplifiers OP3 and OP constituting the comparator circuits 4 and 4' during running.
It is configured such that predetermined comparison voltages e and f are inputted to the - input terminal side of 4, respectively.

On the other hand, differentiating circuits 7 and 8 consisting of capacitors C4 to C7, resistors R7 and R8, and diodes D1 and D2 are connected in parallel to the output sides of the comparator circuits 4 and 4'. The signals g and h are connected to the NPN transistor Tr3 constituting the quick discharge circuit 12 and the quick charge circuit 9, respectively.
The voltage is applied to the base side of the PNP transistor Tr4.

The rapid discharging circuit 12 is interposed between the output side of the integrating circuit 11 and the circuit voltage, and the rapid charging circuit 9 is interposed between the input side of the integrating circuit 11 and the ground.
is charged and discharged, and a sawtooth wave is formed in the changing portion of the DC voltage signal led from the integrating circuit 11 to the input side of the DC amplifier 13.

A voltage controlled variable frequency oscillator 14, a gain controllable power amplifier 15, and a speaker 16 are connected to the output side of the DC amplifier 13, respectively, but since these configurations have already been disclosed in the prior art shown above, Although a detailed description of the configuration will be omitted, the voltage controlled variable frequency oscillator 14 differs from the prior art described above in that it does not require a separate pulse oscillator for oscillating the idling sound.

Next, the operation of this embodiment will be explained separately during idling and when the vehicle is running.

B. When idling: First, by turning on the power switch of transmitting device A, the modulated high frequency signal is transmitted to the receiving device B side, and the modulated high frequency signal received by the receiving device B side is sent to the integrating circuit 353 on the receiving device B side. is applied to the input side of the buffer amplifier 1 as a DC voltage signal with a voltage level corresponding to the idling sound. When performing this, a part of the DC voltage signal is changed in a sawtooth shape by the integrating circuit 353, and the DC voltage signal having the changed part is applied to the input side of the buffer amplifier 1.

In this state, since the changeover switch 26 is not pressed, the inverted output signal from the neutral pulse latch circuit 3 is applied to the switching circuit 36 on the receiver B side, as described above.
Since the signal transmission to the servo circuit 37 is turned off, even if a drive signal for forward and backward movement is transmitted to the receiving device B side, the toy does not run and remains in an idling state.

The DC voltage signal a output from the buffer amplifier 1 is bypassed by the signal bypass circuit 10 and is directly applied to the input side of the DC amplifier 13 without passing through the integrating circuit 11.

Incidentally, the DC voltage signal is also input to the Miller integration circuit 2, and the sawtooth waveform corresponding to the above-mentioned racing is integrated, but since the non-inverted output signal from the latch circuit 3 is at the L level, The switching circuit connected to the ground side of the comparison voltage e, f generation circuit 6 is turned off, and therefore the operational amplifiers OP3, configuring the comparator circuits 4, 4'
Since a circuit voltage of a much higher level than the DC voltage signal is applied to the - input terminal side of OP4, no output signal is output to the output side of the comparator circuits 4 and 4', and the buffer Only the bypassed DC voltage signal a from the amplifier 1 is output to the DC amplifier 13.

(b) While driving When the selector switch 26 is next pressed and a neutral pulse signal is oscillated from the one-shot pulse generator 25, the neutral signal is sent to the neutral pulse latch circuit via the channel separation circuit 351 on the receiving device B side. 3 is input.

When a signal is input to the input side of the latch circuit 3, the switching circuit 36 is turned on and the circuit enters a running state, and the bypass from the buffer amplifier 1 is released and the output signal a is input to the integrating circuit 11. The non-inverted output signal from the latch circuit 3 is applied to the base side of the transistor Tr2 constituting the switching circuit 5 connected to the ground side of the comparison voltage e, f generation circuit 6, and the comparison voltage e,
Predetermined comparison voltages f and e are input from the f generation circuit 6 to the negative input terminal sides of operational amplifiers OP3 and OP4 constituting the comparator circuits 4 and 4', respectively.

On the + input terminal side of the comparator circuits 4 and 4',
A DC voltage signal integrated by the Miller integration circuit 2 is applied, and when the DC voltage signal reaches the comparison voltage e, f setting level during motor acceleration, a signal is output from the comparator circuit, and the signal is sent to the differentiator circuit. Trigger signals g and h obtained by differentiating signals 7 and 8 are led to a rapid discharge circuit 12 and a rapid charge circuit 9, respectively.

After being amplified by the buffer amplifier 1,
In the changing portion of the DC voltage signal d integrated by the integrating circuit 11, that is, the portion corresponding to the acceleration and deceleration of the motor, rapid discharge (during acceleration) or at a position corresponding to the set level of the comparison voltages e and f is generated. Rapid charging (during deceleration) is performed, and the signal i formed into a sawtooth wave at the changing portion is guided to the input side of the DC amplifier 13.

As a result, as shown in waveform chart i in Figure 4, the DC voltage changes in the sawtooth waveform corresponding to idling during idling, and the rotational speed during gear change during acceleration and deceleration. A DC voltage signal carrying sawtooth wave-like DC voltage changes corresponding to the changes is input to the DC amplifier 13 side.

Since the variation range of this DC voltage is minute, the DC voltage is amplified by the DC amplifier 13 and then input to the voltage controlled variable frequency oscillator 14 .

In the voltage controlled variable frequency oscillator 14, when the corresponding DC voltage is input during idling,
A pulse train j corresponding to the sound generated by the engine when idling at 800 to 1000 rpm is generated, while a pulse train j corresponding to the sound generated by the running engine at 2500 to 3500 rpm is generated during high-speed driving. The frequency of the pulse train j is changed in response to a change in the DC voltage level corresponding to a gear change, and when the vehicle is accelerated by operating a steering wheel for forward or backward movement, the frequency of the pulse train j is changed in response to a change in the DC voltage level corresponding to a gear change. While changing the frequency of j, during acceleration (at the start of driving) the frequency is increased from the frequency range during idling to the frequency range corresponding to high speed driving, and when decelerating, the frequency is similarly adjusted to correspond to the gear change. By intermittently changing the frequency of the pulse train j, the pulse train j can be formed from a frequency range during high-speed running to a frequency range during idling.

As a result, the pulse train j outputted from the voltage-controlled variable frequency oscillator 14 does not correspond to changes in the rotation speed of the power system such as the wheels or drive shaft of a radio-controlled car, but corresponds to changes in the engine rotation speed of a real car. In response to this, it is possible to configure the frequency to change when idling and when changing gears.

Then, the pulse train j is shaped by a gain controllable power amplifier 15 into a waveform k whose amplitude is increased or decreased in accordance with the increase or decrease in frequency, thereby making it possible to amplify the volume in response to changes in engine speed. Furthermore, by inputting this shaped pulse waveform k to the speaker 16, it is possible to generate an engine pseudo sound whose volume and sound quality change in response to changes in engine speed.

By connecting a fixed frequency oscillator (not shown) to the input side of the voltage controlled variable frequency oscillator 14, it is also possible to add a special sound such as a turbo sound.

5 to 7 show the circuit configuration of a general-purpose type radio-controlled powered toy that cannot perform rotational control during running, in other words, acceleration/deceleration. FIG. 5 is a block diagram showing the overall configuration, and FIG. The figure is a circuit diagram showing the circuit configuration of a control device for generating an engine pseudo sound, and FIG. 7 is a waveform diagram thereof.

According to this embodiment, since the motor rotation speed cannot be controlled, the DC voltage signal obtained from the receiving device B side does not vary linearly in voltage as in the above embodiment, and the DC voltage signal changes from the idling state to the running state. Also, when switching from the running state to the idling state (hereinafter referred to as state switching), the voltage rises (falls) in a rectangular shape.Digital signal of steady voltage level of H level (during driving) and L level ((during idling)) Since only 1 is obtained, this is integrated using an integrating circuit 61 and rounded to form a DC variation.

In addition, in this embodiment, the time constant of the integrating circuit 61 is made different using the transistor Tr7 at the time of idling in the idling state and at the time of gear change in the running state, and the sawtooth wave formed on the output side of the transistor Tr7 is changed. By changing the inclination of the engine, it is possible to generate different pseudo-sounds when revving and when changing gears, thereby increasing the sense of reality.

Further, in this embodiment, the DC voltage signal having a sawtooth wave corresponding to the idling formed by the integrating circuit 61 in the idling state is not rapidly charged or discharged, and the DC amplifier 6 is
Rapid charging/discharging circuits 59, 62 to lead to the 3rd side
On the base side of the transistors Tr8 and Tr9 constituting the battery, rapid charging/discharging inhibiting means 48 and 49 are provided, which are composed of transistors Tr5 and Tr6 and are operated by an H level signal in an idling state.

Next, the configuration of this embodiment will be briefly described.

As in the previous embodiment, the transmitter A' includes a high-frequency oscillation circuit 71, a modulation circuit 72, a high-frequency power amplification circuit 73, and a control pulse oscillation circuit 24 that outputs various drive pulse signals for forward/backward movement, right/left turns, and switching. A one-shot pulse generator 75 that oscillates a neutral pulse signal that switches between idling and running based on the ON-OFF operation of the switch 76.
and has.

On the receiver B' side, a wave detection circuit 81 extracts the drive pulse signal and the neutral pulse signal.
The control signal extracted by the wave detection circuit 81 is separated by the channel separation circuits 82 and 83, the neutral pulse signal is sent to the neutral pulse latch circuit 53, and the right turn left turn signal is sent to the right turn left turn solenoid 88 drive. The signal is input to the circuit 38 and operates the right-turn/left-turn solenoid 88.

Further, the digital signal A for forward and backward movement with the idling state set to L level and the running state set to H level is inputted to the motor 87 drive circuit 84 and buffer circuit 51 via the switching circuit 86.

Further, the channel separation circuit 82 generates a forward digital signal L which is at L level even when the vehicle is moving backward, and bypasses the switching circuit 86 to input this signal to the motor 87 drive circuit 84 and to the buffer circuit 52, respectively.

The reason for creating the digital signal RO for forward movement is to eliminate the gear change pseudo sound that occurs when driving in reverse, since no gear change is performed when driving in reverse.

After the digital signal B input to the buffer circuit 51 is buffered and amplified by the buffer circuit 51, the normal rotation signal is sent to the differentiating circuit 68, and the inverter 5
The inverted signal inverted by step 4 is input to the differentiating circuit 67, and the digital signal A rises or rises when the state changes from idling to running, or from running to idling. Generates a trigger signal when the signal goes down.

By passing the trigger signals H and G through monostable multivibrators 55 and 56, respectively, rising and falling rectangular waves are formed,
By passing this through a differentiating circuit 57 suspended from the circuit power supply and a differentiating circuit 58 connected to the ground side,
It generates rising and falling trigger signals, and leads them to the rapid discharge circuit 62 and the rapid charge circuit 59, respectively.

On the other hand, the forward digital signal B is a buffer circuit 52.
After buffering and amplifying the waveform, the rising and falling portions at the time of idling and gear change in the running state are integrated using the integrating circuit 61 and smoothed, thereby creating a sawtooth waveform during idling. Also, when changing gears, a linearly varying DC variation is formed, and
The direct current change at the time of gear change is rapidly discharged or rapidly charged to form a sawtooth wave.
(Waveform signal) In this case, a transistor Tr7 is connected to the ground side of one capacitor Cs that constitutes the integrating circuit 61,
When the vehicle is running, the transistor is
By applying an H level signal to the base side of Tr7, the time constant of the integrating circuit 61 is made different during idling and when changing gears while driving, and the sawtooth shape formed on the output side is made different. By changing the slope of the waves, it is possible to generate different pseudo-sounds when revving and when changing gears.

In addition, by applying the inverted output signal D from the neutral pulse latch circuit 53, which becomes H level in the idling state, to the base sides of Tr5 and Tr6 constituting the rapid charge/discharge inhibiting means 48, 49, rapid charge/discharge can be achieved. It is configured to stop the operation of the circuits 59 and 62.

The waveform signal having a sawtooth waveform is passed through a DC amplifier 6.
The pulse train shown in W is passed through a voltage controlled variable frequency oscillator 64 through a voltage controlled variable frequency oscillator 64 through a gain controllable power amplifier 65. This makes it possible to amplify the sound volume in response to changes in engine speed, as in the previous embodiment.

"Effects of the Invention" As described above, according to the present invention, in addition to the pseudo-sound corresponding to changes from idling sound to driving,
A pseudo-sound generation method for a power toy that produces pseudo-sounds that correspond to changes in engine speed, such as when revving or changing gears while driving, to produce pseudo-engine sounds that are even closer to the real thing and have a high sense of realism. It becomes possible to provide equipment.

The present invention is not limited to radio-controlled power toys, but is applicable to all motor-driven power toys.

[Brief explanation of the drawing]

1 to 4 show the circuit configuration of a radio-controlled power toy according to a first embodiment of the present invention, FIG. 1 is a block diagram showing the overall configuration, and FIG.
FIG. 3 is a block diagram showing the main parts of the receiver side, FIG. 3 is a circuit diagram showing the circuit configuration of a control device for generating an engine pseudo sound, and FIG. 4 is a waveform diagram thereof. 5 to 7 show the circuit configuration of a radio-controlled power toy according to a second embodiment of the present invention, and FIG.
6 is a block diagram showing the overall configuration, FIG. 6 is a circuit diagram showing the circuit configuration of a control device for generating engine pseudo-sound, and FIG. 7 is a waveform diagram thereof.

Claims (1)

[Scope of Claims] 1. A switching means for switching between idling and running states is provided on the transmitting device side as well as at least an operating handle for forward and backward movement, and on the other hand, on the receiving device side, an ON/OFF switch is provided on the receiving device side based on a signal from the switching means. Integration that integrates and blunts the DC voltage at the switching means that is OFF controlled and the portions of the switching means where the state changes from OFF to ON (idling state to running state) and from OFF to ON (from running state to idling state). and a means for rapidly charging and discharging the rounded voltage change component, and the power toy is configured to be capable of generating an engine pseudo sound corresponding to the state change using the rapid discharge. pseudo sound generator. 2. When the switching means is in the OFF state (idling state), it is configured to be able to generate a pseudo sound corresponding to racing based on the signal obtained by operating the steering wheel for forward and backward movement, and on the other hand, the switching means is in the ON state. (claim 1) configured to be able to generate a pseudo sound corresponding to a gear change based on an acceleration or deceleration signal obtained by operating the steering wheel for forward and backward movement during (driving state).
The pseudo-sound generating device for the power toy described above.