JPH0713799B2 - Rhythm recognition device and rhythm response toy using the same - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rhythm recognition device and a rhythm response toy using the same, and more particularly to a rhythm recognition device for detecting a rhythm of music and obtaining an output synchronized with the rhythm. The present invention relates to a rhythm response toy that performs a predetermined operation according to the output of a rhythm recognition device.

[Prior Art] Conventionally, as a device for generating a mechanical vibration by adding an output synchronized with a music level to an electric hammer, for example, Japanese Utility Model Laid-Open No. 60-115296 (hereinafter referred to as prior art 1) is known. There is. In the conventional technology, when listening to rock music with a particularly strong rhythm, a mechanical vibration synchronized with the rhythm is generated on the sofa where the listener sits to make the music feel not only auditory but tactile. It is for deepening the feeling of.

Further, conventionally, there has been a toy that reacts to sound (hereinafter referred to as Conventional Technique 2). Prior art 2 has a simple configuration in which a sensor detects a sound, only a loud sound is discriminated by a threshold value, amplified, and given to a drive mechanism. Therefore, the operation is performed only in response to a loud sound.

[Problems to be Solved by the Invention] In the related art 1, since the external music signal detected by the microphone is subjected to the intensity envelope detection to derive the rhythm represented by the strength of the sound, the amplitude is externally applied. When high noise comes from, the noise is falsely detected as a part of music,
Unable to detect accurate rhythm. Further, when mechanical vibration is generated based on the rhythm detection signal of the conventional technique 1, a time lag occurs between the detection of the music signal and the generation of vibration.
Therefore, there is a sense of discomfort because there is a time lag between the vibration actually felt by the skin in a music hall or the like and the vibration caused by the rhythm detection device.

Since the prior art 2 is based on the peak detection, the same problem as the prior art 1 occurs.

Therefore, the main object of the present invention is to provide a novel rhythm recognition device capable of correctly detecting the rhythm of music without being affected by sounds other than rhythm instruments and irregular sounds with high peak values such as external noise. It is to be. Another object of the present invention is to provide a rhythm response toy using a rhythm recognition device that is driven almost in synchronization with the rhythm of music.

[Means for Solving Problems] The rhythm recognition device of the first invention of the present application is configured by a block diagram showing the basic concept as shown in FIG. That is, the rhythm recognition device according to the first aspect of the invention comprises an electric signal generating means 1 for generating an electric signal according to the level of the sound from the music source,
Rhythm signal extraction means 2 including a filter means and a peak detection means and extracting a peak signal as a rhythm signal
An interval data calculation means 3a for calculating interval data by counting intervals at which peak signals occur, and a storage means 3b for sequentially storing the interval data calculated by the interval data operation means.
And a cycle discriminating means 4 for deriving a rhythm synchronization signal based on the regularity of a plurality of interval data stored in the storage means.
With. The cycle determining means derives the rhythm synchronization signal at a timing which is earlier than the generation timing of the rhythmic cycle signal by a predetermined time.

On the other hand, a rhythm response toy using the rhythm recognition device of the second invention of the present application has, in addition to the first invention, a mechanism part including a base and a movable part, a drive means for moving the movable part, and a drive means. And an output control means for energizing.

[Operation] In the first invention, the electric signal generating means 1 generates an electric signal according to music and gives it to the rhythm signal extracting means 2.
In the rhythm signal extraction means 2, the filter means allows the signal in the frequency band corresponding to the sound of the rhythm musical instrument to pass through among the electrical signals, and the peak detection means detects the peak of the signal passed by the filter means. The detected peak signal is extracted as a rhythm signal. The interval data calculation means counts intervals at which peak signals occur and obtains interval data. The storage unit sequentially stores the interval data obtained by the interval data calculation unit. Period discrimination means 4
Is for obtaining interval data having a high occurrence frequency based on a plurality of interval data stored in the storage means 3, determining the rhythm cycle based on the regularity of the interval data, and generating the determined rhythm cycle signal. The rhythm synchronization signal is derived at a timing earlier than the timing by a predetermined time.

In the second aspect of the invention, the output control means 5 energizes the electric drive means 6 in response to the synchronization signal from the cycle discrimination means 4 of the rhythm recognition device. The electric driving means 6 gives a displacement to the movable portion 7b in accordance with the electric urging by the output control means 5. In response, the mechanical unit 7 in the shape of a dynamic toy performs a predetermined action such as moving the body left and right or up and down in response to the rhythm of music.

[Embodiment] FIGS. 2A and 2B are external views showing an embodiment of the present invention. In the figure, this embodiment shows a base 8 and a doll 9.
And a solenoid 10. The doll 9 has a human shape and is composed of a head 11, an arm 12, a body 13 and a foot 14. The head 11 is integrally formed on the upper end of the arm 12. Arm
12 includes forearm members 15 and 16 forming the respective forearm portions (from the elbow to the tip of the hand) of the right arm and the left arm, and upper arm members 17 and 18 forming the upper arm portion (from the elbow to the shoulder).
One end of each of the forearm members 15 and 16 is a free end. The other ends of the forearm members 15 and 16 are rotatably supported by the one ends of the upper arm members 17 and 18, respectively. The other end of each of the upper arm members 17 and 18 is a trunk
It is rotatably supported by 13. Upper arm member 17,18
From each of the other ends, protrusions 19 and 20 extend obliquely upward and obliquely downward. One ends of link plates 21 and 22 are rotatably connected to the respective tips of the protrusions 19 and 20. The other end of each of the link plates 21 and 22 is a connecting plate rotatably supported by a motor or the like at substantially the center of the body 13.
It is rotatably connected to one end and the other end of 23. In such a configuration, the left and right forearms can rotate with respect to the left and right upper arms. Further, the left and right upper arms can rotate with respect to the body portion 13. Further, since the right arm and the left arm are connected by the link plates 21, 22 and the connecting plate 23, they interlock with each other in a predetermined relationship.
The arm portion 12 is not electrically displaced, but is positioned in an arbitrary state by the operation of the user.

On the other hand, the foot portion 14 is the upper leg members 24 and 25 forming the upper thighs (from the knee to the root of the foot) of the right foot and the left foot, and the lower leg member forming the lower thighs (from the knee to the tip of the foot). 26 and
Including 27 and The upper end of each of the upper leg members 24 and 25 is the trunk 13
It is rotatably supported at the lower end of. The lower ends of the upper leg members 24 and 25 are rotatably connected to the upper ends of the lower leg members 26 and 27, respectively. The lower ends of the lower leg members 26, 27 are rotatably supported by the base 8. In such a structure, the left and right upper legs can rotate with respect to the body 13. Further, the left and right lower legs can rotate with respect to the upper leg and the base 8.

Inside the base 8, a solenoid 10 as an example of an electric drive means is provided.
Is stored. One end of a shaft 28 is connected to the plunger of the solenoid 10. The shaft 28 extends upward, penetrates the upper surface of the base 8 and has the other end at the body portion 13.
It is rotatably connected to the body 13 by a pin 29 on the back surface of the. A coil spring 30 is inserted between the solenoid 10 and the upper surface of the base 8 on the shaft 28. This coil spring
The upper end of 30 is fixed to the outer circumference of the shaft 28.

The basic operation or form of the embodiment of FIGS. 2A and 2B in the above-mentioned configuration will be described below. FIG. 2A shows the solenoid 10 in a deenergized state. In this state, the shaft 28 is pushed upward by the action of the coil spring 30. Therefore, the shaft 28 pushes the body portion 13 upward, so that the doll 9 is in an upright state. On the other hand, FIG. 2B shows a state where the solenoid 10 is energized. In this state, the solenoid 10
Attracts against the elastic force of the coil spring 30. Therefore, the body 13 receives a downward force. Depending on the upper leg member 2
4, 25 and the lower leg members 26, 27 rotate and are displaced so that the crotch just expands. Therefore, the torso portion 13 is lowered, and the height of the doll 9 is lower than that in the upright state of FIG. 2A.

As described above, the doll 9 moves up and down by the deenergization and urging of the solenoid 10, but this up and down movement is performed according to the rhythm of music, as will be described later. Although the arm 12 is positioned by the user as described above, the arm 12 makes a random movement within the given degree of freedom by the vibration caused by the vertical movement of the doll 9.

3A and 3B are external views showing another embodiment of the present invention. In the figure, this embodiment shows a base 8 and a doll.
31 and a pair of left and right solenoids 32, 33. In this embodiment, the doll 31 is formed in the shape of a gorilla. The gorilla 31 is composed of an upper half body 34 and a lower half body 35 rotatably connected by a pin 36. A skeleton member 37, which is a skeleton of the upper body 34, is rotatably supported on the pin 36. Also,
A frame member 38, which is a frame of the lower body 35, is rotatably supported on the pin 36. The frame member 38 is formed in an inverted T shape, and one end and the other end of the lower side thereof are rotatably connected to one ends of movable pieces 39 and 40, respectively. These movable pieces 39, 40 are arranged inside the right foot and the left foot of the gorilla 31, but are not fixed to the lower body 35, and their displacement allows the right foot and the left foot of the gorilla 31 to be displaced. Also, the movable piece 3
The shape of 9,40 is formed as a slender plate with a bent shape at the center. Each central portion of the movable pieces 39, 40, that is, the bent portion is pivotally supported by the base 8 and is rotatable. The other ends of the movable pieces 39, 40 are connected to the base 8
Penetrates through the upper surface of and extends inside. These movable pieces
In 39 and 40, the plungers 41 and 42 of the solenoids 32 and 33 are rotatably connected to the central portion of the portion that has entered the base 8. Further, one ends of tension springs 43 and 44 are fixed to the other ends of the movable pieces 39 and 40, respectively. The other end of each of the tension springs 43, 44 is fixed to a protrusion 45 extending downward from the inner wall of the upper surface of the base 8.

The basic operation or appearance of the embodiment shown in FIGS. 3A and 3B in the above-mentioned configuration will be described below. First, as an example of the electric driving means, the solenoids 32 and 33 are deenergized, or one of them is energized. That is, the solenoids 32 and 33 cannot be energized with both at the same time, and when either one is energized, the other is always deenergized. FIG. 3A shows a state in which the solenoids 32 and 33 are both deenergized. In this state, neither of the plungers 41, 42 is applied with any force by the solenoids 32, 33. Therefore, the movable pieces 39, 40 have tension springs 43, 44 at their other ends.
By the same force in the direction of the protrusion 45. Therefore, the movable pieces 39 and 40 tend to rotate counterclockwise and clockwise around the pivot point of the base 8. Since this turning force is evenly applied to both ends of the lower side of the frame member 38, the frame member 38 does not tilt in either the left or right direction, and the gorilla 31 stands upright with its legs slightly extended.

On the other hand, the third light B indicates that only the left solenoid 32 is energized. In this state, the plunger 41 is pulled in by the bias of the solenoid 32. Therefore, the movable piece 39
Tries to strongly rotate clockwise by the force of the tension spring 43. The turning force of the movable piece 39 is transmitted to the movable piece 40 by using the lower side of the frame member 38 as a link, and the movable piece 39 and the movable piece 39 are connected.
The balance of power with 40 is broken. Therefore, the movable pieces 39 and 40
Both rotate clockwise. Therefore, the frame member
38 leans to the left, and the lower body 35 of the gorilla 31 leans to the left accordingly. In addition, the upper body 34 is a lower body 35 by the pin 36.
Since it is rotatably supported by, and receives no force from the solenoids 32, 33, it swings with the movement of the lower body 35, but finally maintains the same state as in FIG. 3A. Therefore,
The shoulders remain horizontal, and only the waist is swung to the right.

Conversely, if only the left solenoid 33 is energized, the
Contrary to Fig. 3B, the hips are swung to the left with the shoulders kept horizontal.

The three modes can be switched according to the rhythm of music, as described later.

Although the doll is formed in the shape of a human or an animal in the above two embodiments, it may be formed in the shape of a robot, a fantasy creature, or a character such as a manga. Other than the doll, the shape of a vehicle or the shape of a plant may be adopted. In short, various shapes that can be dynamic toys can be adopted.

FIG. 4 is a block diagram showing an embodiment of the present invention.
In the figure, a microphone as an example of an electric signal generating means.
46 is connected to the preamplifier 47. The output of the preamplifier 47 is given to the rhythm signal extraction circuit 48. The rhythm signal extraction circuit 48 includes a low pass filter 49, a full wave rectifier 50, a low pass filter 51 and a peak detector 52. The output of the peak detector 52 is given to the CPU 55 via the I / O port 54 included in the microprocessor 53. This CPU 55 includes a counter CT ₀ in addition to a well-known arithmetic function. This counter CT ₀
Is a fixed period output from the clock circuit 56 (for example, 0.01
It receives a reference clock CLK (second −10 ms) and counts this reference clock. The count value of the counter CT ₀ is used as interval data of the rhythm signal extracted by the rhythm signal extraction circuit 48. In addition, the CPU55 has an I / O port 54
RAM57 and ROM58 are connected via. The microprocessor 53 has these I / O ports 54, CPU 55, clock circuit 56, RAM
It consists of 57 and ROM58. A keyboard 59 and an output control circuit 60 are connected to the I / O port 54. keyboard
The numeral 59 includes a plurality of switches such as a start / stop switch and a pattern selection switch, and is provided on the base 8. The user can operate the keyboard 59 to instruct start and stop of the apparatus, and can select and set the movement pattern of the doll from a plurality of predetermined types. The output control circuit 60 includes a driver circuit,
It controls the operation of the solenoids 10, 32, 33 described above. Note that only the solenoid 10 is used when the embodiment of FIGS. 2A and 2B is used as the mechanism portion, and the solenoids 32 and 33 are used when the embodiment of FIGS. 3A and 3B is used.

FIG. 5 is a diagram schematically showing the storage area of the RAM 57 shown in FIG. In the figure, the RAM 57 includes, for example, a selection pattern storage area 61, an interval data storage area 62, a total data storage area 63 and a working area 64. The selection pattern storage area 61 stores, for example, six types of operation patterns of the doll 9 or 31 preset by the keyboard 59 shown in FIG. The detailed data of this operation pattern is stored in the output pattern storage area 66 (see FIG. 6) of the ROM 58. In each area of the selection pattern storage area 61, the head address of the area of the output pattern storage area 66 corresponding to the set operation pattern is stored.

The interval data storage area 62 stores interval data (count value of the counter CT ₀ ) of the rhythm peak (extracted by the rhythm signal extraction circuit 48) of the music entering the microphone 46. The interval data storage area 62 includes a fixed number (for example, 30) of areas and stores, for example, 30 pieces of interval data. In addition, the interval data storage area 62
When the interval data is written to, the write address is circulated so that when the interval data storage area 62 is full, the newest interval data is written in the area of the oldest written interval data. .

The totalized data storage area 63 uses 1 byte thereof as a counter and includes, for example, 11 counters CT _{1 to} CT ₁₁ . The total data storage area 63 is used for classifying and totalizing the interval data stored in the interval data storage area 62 within a predetermined time range by a predetermined time interval. In this embodiment, interval data within a time range of 0.2 seconds to 1.3 seconds is aggregated in 0.1 second (100 ms) steps. For example, the counter CT ₁ counts the frequency of occurrence of interval data of 0.2 seconds or more and less than 0.3 seconds. The counter CT ₂ counts the frequency of occurrence of interval data of 0.3 seconds or more and less than 0.4 seconds. The same applies hereinafter. In this embodiment, the interval data to be aggregated is selected in the range of 0.2 to 1.3 seconds. Generally, in music, if the slowest tempo (eg Largo), one beat cycle is about 1 second. This is because the fastest tempo (for example, Allegro Presto) has a period of about 0.33 seconds per beat, which is enough to cover this.

The working area 64 includes various pointers and registers. The pointer PN ₁ is used to specify the write address of the interval data storage area 62. The pointer PN ₂ is used to specify the read address of the interval data storage area 62. The pointer PN ₃ is used to specify _one of the counters CT _{1 to} CT ₁₁ whose count value should be read (that is, the read address of the totalized data storage area 63). Pointer
PN ₄ is used to specify the read address of the selection pattern storage area 61. The pointer PN ₅ is used to specify the read address of the output pattern storage area 66 of the ROM 58, which will be described later. The register W stores the detected music cycle data (obtained by the arithmetic processing). The registers X and Y are stored in each counter of the total data storage area 63.
It is used to detect the value of the highest frequency of occurrence of interval data per second. That is, the register X stores the value of the highest occurrence frequency that has been checked up to that point during the detection process. The register Y stores the count value of each counter, that is, the occurrence frequency, which is sequentially read from the total data storage area 63. Then, the value of the occurrence frequency stored in the register X is compared with the value of the occurrence frequency stored in the register Y, and if the register Y is larger, the storage content of the register Y is transferred to the register X. The register Z stores the value of the interval data corresponding to the counter that stores the occurrence frequency of the largest value. The register A is for storing the data read from the selection pattern storage area 61 by addressing the pointer PN ₄ (the start address of any pattern data stored in the output pattern storage area 66 of the ROM 58). The register B is for storing the read address of the output pattern storage area 66 in the ROM 58.

FIG. 6 is a diagram schematically showing the storage area of the ROM 58 shown in FIG. In the figure, ROM 58 includes, for example, a program storage area 65 and an output pattern storage area 66. The program storage area 65 stores an operation program of the CPU 55 (see FIG. 4) (for example, an operation program as shown in FIGS. 7A to 7C). The output pattern storage area 66 includes a plurality of types (for example, pattern A) relating to the movement pattern of the doll in order to change the movement of the doll 9 or 31.
To four types of data) are stored. Each operation pattern (-output pattern) is from OO to OF (however, 16
It is a decimal number. In the following, when representing a hexadecimal number, H is added after the number. ) 16 bytes. One byte is composed of 8 bits D _{0 to} D ₇ . In the embodiment shown in FIGS. 2A and 2B, only bit D ₀ is used. Logic "0" in the bit D _0, the solenoid 10 by a "1" is de-energized, biasing. Also, bits D ₁ and D ₂ are used in the embodiment shown in FIGS. 3A and 3B. That is, the logic "1" of the bit D ₁ activates the solenoid 32,
Solenoid 33 with a logic "1" of the D ₂ is energized. The four types of pattern data stored in the output pattern storage area 66 can be selected and set in advance by the user operating the keyboard 59 (see FIG. 4).
Then, the start address of each of the selectively set patterns is loaded into the selected pattern storage area 61 (see FIG. 5).

7A to 7C are flowcharts for explaining the operation of the embodiment of the present invention. Note that FIG. 7C shows the details of the subroutine of step S38 shown in FIG. 7B. 8A and 8B are time charts for explaining the operation of the embodiment of the present invention. The operation of the above embodiment will be described below with reference to these drawings.

First, the operation of the rhythm signal extraction circuit 48 shown in FIG. 4 will be described with reference to FIG. 8A. When music is played, the microphone 46 converts voice into an electric signal. The voice signal (music signal) converted into the electric signal is amplified by the preamplifier 47 and then given to the rhythm signal extraction circuit 48.
In the rhythm signal extraction circuit 48, the low pass filter 49 first removes the high frequency component of the audio signal from the preamplifier 47, and the 8th A
A low frequency conversion signal as shown in FIG. Only a half wave of the low-frequency converted signal is taken out by the full-wave rectifier 50 (see FIG. 8A (b)) and is given to the low-pass filter 51. The low-pass filter 51 envelope-detects the output of the full-wave rectifier 50 and outputs a signal as shown in FIG. 8A (c). The peak detector 52 discriminates the output of the low-pass filter 51 by a certain threshold value and outputs a signal representing the peak (see FIG. 8A (d)). The peak signal thus obtained represents the peak of the rhythm of music.
Therefore, based on the output of the rhythm signal extraction circuit 48,
The rhythm cycle of music can be detected. This detection is achieved by arithmetic processing in the microprocessor 53.

That is, the microprocessor 53 classifies the intervals of the rhythm peaks in 0.1 second increments and totals them, and determines the interval data with the highest frequency of occurrence as the rhythm cycle. At this time, the interval between the peaks of each rhythm is counted by the counter CT ₀ . That is, the counter CT ₀ is completely independent of the operation steps of the CPU 55 (FIGS. 7A to 7C) and the clock circuit 56.
The reference clock CLK (10 ms cycle) from is always counted. Then, every time the rhythm peak is detected, the counter CT ₀ is written in any area of the interval data storage area 62 of the RAM 57 as the rhythm peak interval data, and is reset almost at the same time to the next interval. Count the data. Therefore, the count value of the counter CT ₀ indicates the time interval of the rhythm peak. The clock circuit
By shortening the period of 56 reference clocks CLK,
The resolution of the calculation processing of the rhythm cycle in the microprocessor 53 can be increased.

Next, the overall operation of the above embodiment will be described focusing on the operation steps of the CPU 55.

First, when a power supply (not shown) is turned on, the operation shown in FIG. 7A is started, and key input waiting and operation pattern selection setting are performed in steps S1 to S5. That is, in step S1, initial reset is performed. By this initial reset, all data in the RAM 57 is cleared. Next, in step S2, it is determined whether or not there is a key input from the keyboard 59. If there is no key input, the operation of step S2 is repeated to enter the standby state. If there is a key input, the process proceeds to step S3, and it is determined whether or not the operation pattern has been selected. If the operation pattern is selected, the process proceeds to step S5,
Selected pattern storage area in the order of set operation patterns
The head address of the corresponding pattern area of the output pattern storage area 66 is written in each area 61. Then, the operation returns to step S2 again. When the start key (not shown) is turned on after the pattern selection is completed, that is the step S4.
And the next operation is performed.

Next, in steps S6 to S13, the operation of storing the interval data counted by the counter CT ₀ in the interval data storage area 62 is performed. First, in step S6, it is determined whether or not the rhythm signal from the rhythm signal extraction circuit 48 has risen. If the rhythm signal rises, step S7
Then, it is determined whether or not the count value of the counter CT ₀ is equal to or less than a certain value (for example, the count value corresponding to 0.1 second). If the count value is less than or equal to a certain value, noise is erroneously detected, and this is ignored so that the operation is not loaded and the operation returns to step S6.
Depending on the music, as shown in (d) of FIG. 8A,
The rhythm interval may become extremely short during the music, such as between the fifth and sixth pulses from the left, but in this case the interval between the fifth and sixth pulses. The data is ignored. However, in this embodiment, there is no problem because statistics of a plurality of interval data are obtained to obtain the entire rhythm cycle. On the other hand, if it is determined in step S7 that the count value of the counter CT ₀ is greater than or equal to a certain value, the process proceeds to step S8, and the count value of the counter CT ₀ is designated by the pointer PN ₁ (initially 0) Loaded at 62. Initially, the interval data is loaded into area 1 of the interval data storage area 62. Next, in step S9, the counter CT ₀ is reset. As a result, the counter CT ₀ newly starts counting the time interval from the current input pulse to the next input pulse. Then, in step S10, the pointer PN ₁ is incremented and the read address of the interval data storage area 62 is incremented. Next, in step S11, the value of pointer PN ₁
It is determined whether or not it has reached 30. If the number is not 30, the process directly goes to the operation step shown in FIG. 7B. However, in the case of 30, the pointer PN ₁ points to the area next to the last area of the interval data storage area 62. Pointer PN
₁ is set to 0, and addressing is performed again from the head area of the interval data storage area 62. Therefore, the read address of the interval data storage area 62 circulates (0 to 29).
Thus, the newest interval data is written in the area of the oldest written interval data. As a result, the data in the interval data storage area 62 is erased in order from the oldest written interval data. If it is not determined in step S6 that the rhythm signal has risen, the process proceeds to step S12, and it is determined whether the counter CT ₀ overflows (for example, 2 seconds or more). If there is no overflow, move to the operation of FIG. 7B.

Next, in steps S14 to S25 shown in FIG. 7B, the interval data is classified and tabulated. First, step S1
At 4, the pointer PN ₂ is set to 1. And
In step S15, the interval data of the address designated by the pointer PN ₂ is read from the interval data storage area 62. Succeedingly, in a step S16, it is determined whether or not the read interval data is 0, and if not, it is determined in a step S17 whether or not the interval data is less than 0.2 seconds. If the interval data is 0 or less than 0.2 seconds, it is considered as noise or false detection and the following steps are skipped.
Go directly to S20. On the other hand, if the interval data is 0.2 seconds or more, the process proceeds to step S18, and it is determined whether the interval data is less than 0.3 seconds. At this time, the interval data is less than 0.3 seconds (strictly speaking,
If it is 0.2 seconds or more and less than 0.33 seconds), the counter CT ₁ of the total data storage area 63 is incremented by ₁ in step S19. Then, the process proceeds to step S20 and the pointer PN ₂
Is incremented by 1 and the read address of the interval data storage area 62 is incremented. Next, in step S21, the value of pointer PN ₂
It is judged whether it is 30 or not. Pointer PN ₂ when the interval data in the final area of the interval data storage area 62 is not read
Since the value of is less than 30, the process returns to step S15 again, and the interval data of the next area is read out and totaled. On the other hand, if it is determined in step S18 that the interval data is not less than 0.3 seconds, the process proceeds to step S22, and it is determined whether the interval data is less than 0.4 seconds (strictly, 0.3 seconds or more and less than 0.4 seconds). . If this determination is YES, the process proceeds to step S23, the counter CT ₂ is incremented by 1, and the process proceeds to step S20. After that, in the same manner, the read interval data
It is determined in 0.1 second steps to which the range belongs, and the count value of the corresponding counter is incremented. Finally, in step S24, it is determined whether the interval data is less than 1.3 seconds (strictly 1.2 seconds or more, less than 1.3 seconds),
If the determination is YES, the counter CT ₁₁ is incremented in step S25 and the process proceeds to step S20. On the other hand, when the interval data is 1.3 seconds or more, neither counter is incremented and the operation proceeds to step S20. Therefore, in this embodiment, the interval data read from the interval data storage area 62 is classified and aggregated to which time area divided by 0.1 seconds in the range of 0.2 seconds to 1.3 seconds. It Here, the interval data to be aggregated is 0.2
The reason for selecting the range of seconds to 1.3 seconds is as described above. As a result of the processing in steps S14 to S25, each counter CT
_{1 to} CT ₁₁ store the occurrence frequency of interval data belonging to the corresponding time region.

Next, in steps S26 to S33, the interval data having the maximum occurrence frequency is detected. First, step S26
At 1, the pointer PN ₃ is set to 1. And
In step S27, the value of the counter in the totalized data storage area 63 designated by the pointer PN ₃ is loaded into the register X, and the interval data corresponding to this counter (each counter in advance) is loaded.
Corresponding interval data is defined for each CT _{1 to} CT ₁₁ )
Is loaded into register Z. Subsequently, the pointer PN ₃ is +1 in step S28, the read address of the aggregated data storage area 63 is incremented. Then, in step S29, the value of the counter designated by the pointer PN ₃ is loaded into the register Y. Then, in step S30, the value of the register X and the value of Y are compared to determine which is larger.
When the value of register X is larger than the value of register Y, the operations of steps S31 and S32 are skipped and step S is directly executed.
If the value of the register Y is larger than the value of the register X, the process proceeds to step S31, and the value of the register Y is transferred to the register X. As a result, the value of the counter with the maximum occurrence frequency is always stored in the register X. Next, interval data corresponding to the counter designated by the pointer PN ₃ proceeds to step S32 is loaded into the register Z. Therefore, the register Z stores the interval data having the maximum occurrence frequency. Then, step S33.
Then, it is determined whether or not the pointer PN ₃ has reached 11, that is, whether or not the processing up to the final counter CT ₁₁ of the total data storage area 63 has been completed. If the value of the pointer PN ₃ is smaller than ₁₁ , the processing up to the counter CT ₁₁ has not been completed, and thus the operation returns to the operation of step S28, and the same operation as described above is repeated.

On the other hand, when the value of the pointer PN ₃ is 11, the process proceeds to step S34, and it is determined whether the value of the register X is 5 or more. If the value of the register X is less than 5, it is assumed that the interval data of a sufficient number for determining the rhythm cycle data has not been aggregated, and the process returns to the operation of step S6 shown in FIG. Data is detected and aggregated.
On the other hand, when the value of the register X is 5 or more, step S35
Then, the interval data stored in the register Z is determined as the rhythm cycle data T, and this is loaded into the register W.

Next, in steps S36 to S39, output control, that is, drive control of the doll is performed. First, in step S36, calculation of the start timing of the drive control (Ta = T-t ₀₎ is performed. Here, t ₀ is the response delay time of the drive mechanism of this embodiment. This is to eliminate the discrepancy between the operation of the doll 9 or 31 and the actual rhythm of music by setting the drive control start timing in consideration of the response delay time of the drive mechanism. In step S37, the counter C
It is determined whether T ₀ has reached the time Ta. Here, the counter CT ₁ newly starts counting from step S9 described above, but since the operations from step S9 to step S36 are processed at high speed by the CPU 55, the counter CT ₁ is counted before proceeding to the operation of step S37. CT ₀ can never reach the Ta time. When the counter CT ₀ reaches the time Ta, the process proceeds to step S38, and the pattern data is read from the output pattern storage area 66 and its output control is performed in a preset order. The details of the subroutine of this step S38 are the seventh
Shown in Figure C. The operation will be described below.

First, in step S100, the start address of the preset operation pattern from the address of the selection pattern storage area 61 designated by the pointer PN ₄ (initially 0) (any one of the pattern data areas in the output pattern storage area 66) The top address of the area) is read and loaded into register A. Succeedingly, in a step S101, the value of the pointer PN ₅ (initially 0) is added to the register A, and the addition result is loaded into the register B. Then, after the pointer PN ₅ is incremented by 1 in step S102, step S103
And the value of pointer PN ₅ is 10H (however, the value before H is 16
(Indicating that it is a hexadecimal display).
That is, in step S103, it is determined whether the reading is completed up to the final address of one pattern (for example, OFH of pattern A). If the pointer PN ₅ is not 10H, the process proceeds to step S108, the pattern data of the address of the output pattern storage area 66 designated by the register B is read, and the solenoid drive control signal is sent to the output control circuit 60 based on the logic. Given. In response, the solenoid 10 or 32, 33 is driven, and the doll 9 or 31 is displaced accordingly. The solenoid drive control signal is output earlier than the actual cycle T by the response delay time t ₀ of the mechanical section (see FIG. 8A (e)).

On the other hand, in step S39 in FIG. 7B, all pointers (except the pointer PN _4, PN ₅₎ is reset, and returns to the operation of step S6 in Figure 7A. The same operation as described above (detection of interval data, totalization and determination of cycle data) is performed again, and the operation shown in FIG. 7C is resumed. At this time, the pointer PN ₅
Has been stepped up at the previous step S102, so the pattern data read from the output pattern storage area 66 is advanced by one address. After that, the same operation is repeated,
At the read cycle of the last address of one pattern (consisting of 16 bytes), the pointer PN ₅ becomes 10H,
By the determination in step S103, the process proceeds to step S104. In this step S104, the pointer PN ₅ is reset. Then, in step S105, the pointer PN ₄ is incremented by one. As a result, the read address of the selected pattern storage area 61 is advanced by one. Succeedingly, in a step S106, it is determined whether or not the pointer PN ₄ is 6. That is, step S106
Then, it is determined whether or not the reading of the last set data (start address) set in the selection pattern storage area 61 is completed. If the value of pointer PN ₄ is not 6, step S
Proceeding to 106, the reading and output control of the pattern data is performed in the same manner as described above. On the other hand, if the pointer PN ₄ is 6, the pointer PN ₄ is reset in step S107,
Continue to 108.

By the operation of FIG. 7C described above, 16 byte data of each pattern are sequentially output to the output control circuit 60 in the order of preset operation patterns. FIG. 8B shows an example of the output pattern. Pattern A is used especially in the embodiment shown in FIGS. 2A and 2B, and patterns B-D
Is particularly used in the embodiment shown in FIGS. 3A and 3B. In pattern A, the solenoid 10 is energized at its high level portion and deenergized at its low level portion.
Therefore, in pattern A, the solenoid 10 is repeatedly energized and deenergized for each cycle of the rhythm, and accordingly the doll 9 moves up and down in synchronization with the rhythm. On the other hand, in patterns B to D, the signal S ₁ is a drive control signal for the solenoid 32,
S ₂ is a drive control signal for the solenoid 33. Then, the corresponding solenoid is energized at the high level portion of each signal and deenergized at the low level portion. For example, when the signal S ₁ is high level, the solenoid 32 is energized and the doll 31 moves to the third B
Shake your hips to the right as shown. On the other hand, when the signal S ₂ is at a high level, the solenoid 33 is energized and the doll 31 swings to the left, contrary to FIG. 3B. And, in the repetition of 16 rhythms, the combination of how to swing the hips is made different for each pattern. Therefore, by selecting and setting these patterns, the doll can perform extremely complicated and interesting motions in accordance with the rhythm of music. In addition, in FIG. 8B, FIG. 2A and FIG.
Only one type of pattern (pattern A) used in the illustrated embodiment is shown, but the vertical movement is not performed alternately for each cycle of the rhythm, but is performed every two or three times. Also, it is possible to form a pattern by combining them in a complicated manner. In this case, several kinds of operation patterns can be made in addition to the basic pattern A, so that it may be appropriately selected and set.

Next, when the music stops, the rhythm signal is not output from the rhythm signal extraction circuit 48, so that the overflow of the counter CT ₀ is determined in step S12 described above. for that reason,
In step S40, the cycle data stored in the register W is cleared. Then, in step S41, the interval data 62
All interval data of is cleared and the operation returns to step S6. After that, steps S6 and S1 until the music starts playing again.
The operation of 2, S40, S41 is circulated. It should be noted that step S42 as shown by the dotted line in FIG. 7A may be added to clear all other data in the RAM 57.

[Effects of the Invention] As described above, according to the rhythm recognition device of the first invention,
The regularity of the rhythm of the input music is detected, and the rhythm synchronization signal is output at a timing earlier than the rhythm recording signal by a predetermined time, so irregularities with high peak values such as sounds other than rhythm instruments and external noise are generated. It is possible to output a synchronization signal that enables accurate synchronization with surrounding music without being affected by various sounds.

According to the second aspect of the present invention, the conventional dynamic toy that performs an operation accurately synchronized with the regularity of the rhythm of the surrounding music,
It is possible to obtain a dynamic toy having a new function that has never been seen. In addition, the movement can strongly attract the interest of the user, and the movement can be varied by changing the music or the music, which makes it less likely to get tired and more interesting. Furthermore, since the child's sense of rhythm can be cultivated while playing, it is also highly effective as an educational toy.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic concept of the present invention.
2A and 2B are external views showing an embodiment of the present invention. 3A and 3B are external views showing another embodiment of the present invention. FIG. 4 is a block diagram showing an embodiment of the present invention. FIG. 5 is a diagram schematically showing a storage area of the RAM. FIG. 6 is a diagram schematically showing the storage area of the ROM. 7A to 7C are flowcharts for explaining the operation of the embodiment of the present invention. 8A and 8B are time charts for explaining the operation of the embodiment of the present invention. In the figure, 1 is an electric signal generation means, 2 is a rhythm signal extraction means, 3 is a storage means, 4 is a processing means, 5 is an output control means, 6 is an electric drive means, 7 is a mechanical section, and 7a is a base. , 7b
Is a movable part, 8 is a base, 9 and 31 are dolls, 10, 32 and 33 are solenoids, 46 is a microphone, 48 is a rhythm signal extraction circuit, 53 is a microprocessor, 59 is a keyboard, and 60 is an output control circuit. .

Claims (7)

[Claims] 1. A rhythm recognition device which is provided independently of a music source and recognizes a rhythm based on music from the music source. The rhythm recognition device is an electrical device according to a level of a sound from the music source. Electric signal generating means for generating a signal, filter means capable of passing a signal in a frequency band corresponding to the sound of a rhythm instrument among the electric signals, and peak detecting means for detecting a peak of the signal passed by the filter means A rhythm signal extracting means for extracting the detected peak signal as a rhythm signal, interval data calculating means for calculating interval data by counting intervals at which the peak signal occurs, and a storage area for storing a plurality of interval data. Storage means for sequentially storing the interval data obtained by the interval data calculation means, and a plurality of intervals stored in the storage means The interval data having a high frequency of occurrence based on the data, determining the rhythm cycle based on the regularity of the interval data, and providing a cycle determining means for deriving a rhythm synchronization signal synchronized with the determined rhythm cycle, The rhythm recognition device for deriving the rhythm synchronization signal, wherein the cycle determination means derives the rhythm synchronization signal at a timing which is earlier than the generation timing of the rhythm cycle signal by a predetermined time. 2. A rhythm response toy using a rhythm recognition device which is provided independently of a music source and operates in response to a rhythm based on music from the music source. , An electric signal generating means for generating an electric signal according to the sound level, a filter means capable of passing a signal in a frequency band corresponding to the sound of a rhythm instrument among the electric signals, and a filter means for passing the signal. A rhythm signal extracting means for extracting the detected peak signal as a rhythm signal, an interval data calculating means for calculating interval data by counting intervals at which the peak signal occurs, A storage unit including a storage area for storing the interval data, for sequentially storing the interval data obtained by the interval data calculation unit; The rhythm cycle is determined based on the regularity of a plurality of interval data stored in, and the rhythm synchronization signal that is synchronized with the determined rhythm cycle is advanced by a predetermined time earlier than the generation timing of the rhythm cycle signal. Cycle determining means for leading out, a mechanism part having the shape of a toy and including a base and at least one movable part provided on the base, an electric drive means for moving the movable part when electrically biased, And a rhythm response toy using a rhythm recognition device, comprising output control means for urging the electric drive means in response to a rhythm synchronization signal output from the cycle determination means. 3. The storage means sequentially stores the interval data in the storage area, stores a fixed number of the interval data, and then stores the new interval data in the storage area of the oldest interval data in an updated manner. A rhythm response toy using the rhythm recognition device according to claim 2. 4. The rhythm recognition device according to claim 2, wherein the movable portion includes a lateral displacement mechanism that is displaced left and right, and a pivoting mechanism that pivots in conjunction with the lateral displacement. There was a rhythm response toy. 5. The left-right displacement mechanism includes a pair of link mechanisms whose lower ends are pivotally supported by the base, and one of the link mechanisms is pivotally connected to the electric drive means via a connecting rod. A rhythm response toy using the rhythm recognition device according to claim 4, which is supported. 6. A rhythm response toy using a rhythm recognition device according to claim 2, wherein said cycle discriminating means generates a synchronization signal every time a certain number of rhythm synchronization signals occur. 7. The cycle discrimination means derives the signal as a signal synchronized with the cycle of the rhythm at a timing earlier than the generation timing of the cycle signal of the rhythm by the operation response time of the movable portion. A rhythm response toy using the rhythm recognition device according to item 2 or 6.