KR100670024B1 - Low frequency massager using a rhythm - Google Patents

Abstract

A low frequency stimulator using rhythm of music is provided to increase massage effects by letting speed and strength of a low frequency stimulator changed according to the rhythm of music. The low frequency stimulator includes a sound data management unit, a sound data signal processing unit and a low frequency stimuli unit. The sound data management unit downloads and manages sound data from a PC. The sound data signal processing unit receives selected sound data from the sound data management unit, and produces rhythm signal corresponding to the same sound data. The low frequency stimuli unit converts the rhythm signal produced by the sound data signal processing unit into low frequency signal and transmits the low frequency signal to a human body.

Description

Low frequency massager using a rhythm

1 is a block diagram of a low frequency stimulator tuned to the rhythm of music according to the present invention;

2 is a flowchart of a signal processing procedure performed by a signal processing processor.

3 is a waveform diagram of a music signal processed according to a signal processing process as shown in FIG. 2.

4 is a flowchart of a process of searching for a music start point by a signal processing processor;

5 is an exemplary diagram of a music starting point found according to a music starting point searching process as shown in FIG. 4.

6 is a waveform diagram of a typical music signal.

7 is a flowchart of a linear interpolation process performed by a signal processing processor.

8 is a waveform diagram of a rhythm signal finally signal processed by a low frequency stimulator tuned to the rhythm of music according to the present invention;

* Explanation of symbols for main parts of the drawings

100 .. Decoder 101 .. Flash memory

102 .. Micom 103 .. Key input

104 .. Signal processor 105. Buffer memory

106 .. Local Oscillators 107 .. D / A Converters

108 .. Filter 109 .. Mixer

110 .. Voltage regulator 111. Amplifier

112 .. Transformer 113 .. Pad

The present invention relates to a low frequency stimulator that is tuned to the rhythm of music, and more particularly, to prevent a strong low frequency stimulus caused by surge voltage, so that a gentle massage can be performed, and the speed of the stimulator according to the rhythm of the music selected by the user. The present invention relates to a low frequency stimulator that is tuned to the rhythm of music to increase the massage effect by allowing the massage to be performed while the intensity is automatically changed.

With the advent of the well-being age, people have a lot of interest in health, especially with the advent of an aging age, the interest in the medical physiotherapy device and its market is growing. Medical physiotherapy machines are mechanical devices that mechanically touch the body and perform massage functions, and low-frequency electric stimulators that perform massage functions by stimulating electricity having very low frequency components through the body.

In general, low frequency stimulator is a device for stimulating the nerves or muscles of the human body by using electrical signals consisting of low frequency pulses, it can provide the effect of tapping, kneading, massage, massage, acupressure, in particular nerve paralysis, Because of the advantage that can be performed by the user alone for the treatment of stiffness, pain, etc., it is widely used as a self-healing procedure at home.

Until now, the low frequency electric stimulator uses a method of generating pulses at regular intervals and applying stimulation of pulse electricity to the human body. It is built in advance so that the interval of pulse can be adjusted so that the user can select and operate according to various rhythms.

These low frequency stimulators are devices designed to relax and relax muscle tension by tapping or rubbing certain parts of the body.

However, when using the conventional low frequency stimulator as described above, the user has to spend the time in vain because the user has to lie down or lie down without doing anything while the low frequency stimulator operates.

On the other hand, rather than physically kneading or applying low frequency stimulation, muscle tension or low frequency stimulation is accompanied by low frequency stimulation in accordance with the rhythm of the music currently being listened to, while the massage effect is physical If the electrical stimulation and the mental listening music are motivated and the muscle stimulation occurs to the music, the effect will be greatly increased than otherwise.

In addition, the conventional low frequency stimulator has a problem that the surge voltage is generated in the rising or falling portion (discontinuity point) of the pulse to give the user a feeling of discomfort rather than a soft feeling. Therefore, it is necessary to prevent the occurrence of such a surge voltage.

The present invention has been made in view of the above-described problems, and does not generate a surge voltage even at the discontinuous point of the pulse to perform a smooth massage operation, and the speed and intensity of the low frequency stimulator is automatically changed to match the rhythm of the music. The goal is to provide a low-frequency stimulator that is synchronized with the rhythm of the music that allows the massage to increase the massage effect.

A low frequency stimulator tuned to the rhythm of music according to the present invention for achieving the above object, in a typical low frequency stimulator, music data management means for downloading and managing music data from a PC or the like; Music data signal processing means for receiving music data selected according to a user's request from the music data management means and generating a rhythm signal corresponding to the music data; And low frequency stimulation means for converting the rhythm signal generated by the music data signal processing means into a low frequency signal and delivering the same to the human body.

The music data management means may further include a speaker configured to convert the downloaded music data into an audible sound.

The music data signal processing means includes: music data preprocessing means for searching for a music starting point by signal processing while continuously reading music data selected by a user from among music data managed by the music data management means; And music data post-processing means for generating a rhythm signal by linearly interpolating the transition section and the attenuation section centering on the maximum value of each music start point retrieved by the music data pre-processing means.

The music data preprocessing means registers music data larger than a threshold set by the user as a candidate point of a music starting point, and wherein the time intervals of two candidate points registered successively among these registered candidate points are larger than a preset time interval. If it has a value, it is characterized by registering as a music starting point.

The music data preprocessing means comprises: filtering means for filtering music data using a low pass filter; Rectifying means for rectifying the music data filtered by the filtering means; Normalization means for normalizing the music data rectified by the rectification means; And undifferentiating means for undifferentiating the music data normalized by the normalization means.

The music data post-processing means linearly interpolates from a time point corresponding to a preset sampling value to a maximum value of the first music starting point searched by the music data preprocessing means, and from the maximum value of the first music starting point to the second music. The rhythm signal may be generated by linearly interpolating to a time point corresponding to a preset sampling value in the direction before the start point.

The low frequency stimulating means includes: a DAC for converting music data signal-processed by the music data signal processing means into an analog; A mixer for mixing the music signal output from the DAC and the oscillation frequency input from a local oscillator; A voltage regulator for adjusting the strength of the low frequency signal transmitted to the pad in contact with the human body; And a transformer for coupling the low frequency signal voltage adjusted by the voltage regulator to the pad.

The low frequency stimulating means may further include a low pass filter for removing a surge voltage of the rhythm signal processed from the DAC.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a block diagram of a low frequency stimulator tuned to the rhythm of music according to the present invention, FIG. 2 is a flowchart of a signal processing process performed by a signal processing processor, and FIG. 3 is a signal processing process of FIG. 4 is a waveform diagram of a music signal processed according to the present invention. FIG. 4 is a flowchart of a process of searching for a music starting point by a signal processing processor, FIG. 5 is an exemplary view of a music starting point searched according to a music starting point searching process as shown in FIG. 7 is a waveform diagram of a typical music signal, FIG. 7 is a flowchart of a linear interpolation process performed by a signal processing processor, and FIG. 8 is a rhythm signal finally signal processed by a low frequency stimulator tuned to the rhythm of music according to the present invention. Is a waveform diagram of.

In general, MP3 music files are sampled (sampling frequency 44.1KHz) to improve the sound quality and to accommodate high musical instrument sounds up to 22050Hz, and have two channel data for stereo.

The low frequency stimulator tuned to the rhythm of the music according to the present invention extracts the rhythm information from the MP3 music file as described above, generates a virtual rhythm signal suitable for the rhythm information, and then uses the rhythm signal to utilize the pad of the low frequency stimulator. The amount of current flowing in the variable is controlled.

The low frequency stimulator according to the present invention comprises music data management means for downloading and managing music data from a PC or the like, and processing music data selected according to a user's request to generate a rhythm signal corresponding to the music data. Means, and a low frequency transmission means for converting the rhythm signal generated by the music data signal processing means into a low frequency signal and transmitting it to the human body.

On the other hand, the music data management means is received via the USB port 115 under the control of the microcomputer 102 and the microcomputer 102 responsible for the overall control of the low frequency stimulator tuned to the rhythm of the music according to the present invention. A decoder 100 for signal processing music data, and a flash memory 101 for storing music data signaled by the decoder 100.

The music data management means further includes a speaker 116 that converts the music data signaled by the decoder 100 into an audible sound and outputs the audible sound. The decoder 100 of the music data management means Under the control of the microcomputer 102, the music data stored in the flash memory 106 is signal-processed and output to the speaker 116.

In addition, the microcomputer 102 controls the massage type, the operating strength, the driving time, etc. of the low frequency stimulator according to a user's command input through the key input unit 103 provided with a plurality of function keys.

On the other hand, the music data signal processing means is a music data preprocessing means for searching for a music starting point by continuously reading the music data selected by the user from among the music data managed by the music data management means and the music data preprocessing means. And a music data post-processing means for generating a rhythm signal corresponding to the rhythm of the music by linearly interpolating each music start point retrieved by the means into a transition section and attenuation section around the maximum value of the music start point.

The preprocessing operation and the postprocessing operation for the music data as described above are performed by the signal processing processor 104. That is, the signal processor 104 receives the music data from the decoder 100 under the control of the microcomputer 102, and stores the music data in the buffer memory 105 by a predetermined size (two seconds of music data in the present invention). Performs filtering, rectification, normalization, and differentiation of music data to search for music starting points, and performs linear interpolation with transition and attenuation sections on neighboring music starting points based on the found music starting points. It generates a rhythm signal corresponding to.

The filtering operation of the signal processing processor 104 is performed by the filtering means, and the filtering means draws about 2 seconds of MP3 music data from the buffer memory 105 under the control of the microcomputer 102 and passes the low frequency. Filtering is performed using a filter (not shown).

The rectifying operation of the signal processing processor 104 is performed by the rectifying means, and the rectifying means maintains only a value greater than '0' and less than '0' for the information filtered by the filtering means. Will perform the rectification operation to make '0'.

The normalization operation of the signal processing processor 104 is performed by the normalization means, which normalizes the maximum value to '1' for the music data rectified by the rectification means, and the remaining values are proportional to each other. It will perform the normalization operation.

The undifferentiating operation of the signal processing processor 104 is performed by the undifferentiating means, and the undifferentiating means in the present invention is a music data value immediately preceding the current music data value for the music data normalized by the normalization means. A differentiation operation to subtract is performed. As described above, the result of subtracting the immediately previous music data value from the current music data value becomes an approximate derivative value. Through this undifferentiated process, the music data having the maximum value can be found.

The derivative value is a positive value if the size of the music data behind it is larger than the one in front of it, and becomes a negative value if it is small. The starting point of the music is that the sound decreases and becomes larger. Since the present invention is a positive value, the present invention searches for a music starting point only by considering a portion where the derivative value becomes positive.

The preprocessing operation by the signal processor 104 will be described in more detail with reference to FIGS.

As described above, the signal processing processor 104 reads the music data by a predetermined size (2 seconds of music data as described above) and performs signal processing on a predetermined block basis to search for a music starting point. Hereinafter, music data of two seconds is referred to as a music data block. The signal processing processor 104 performs a signal processing operation on the music data for all of the music data files. Then, it is determined whether the music data file exists (S10) and the signal processing process is terminated when the file no longer exists.

Subsequently, if the result of the determination (S10) does not end the music data file, one music data block is read (S12) and the following signal processing is performed (S14 to S26).

That is, the signal processing processor 104 performs the filtering, rectifying, normalizing, and undifferentiating processes on the read one music data block as described above. FIG. 3 (a) shows the original music signal, and FIG. 3 (b) shows the music signal after the rectification process is completed by the signal processing processor 104.

Subsequently, the signal processor 104 compares the threshold voltage set by the user with each data size of the normalized music data block (S16), and maintains only when the data size is larger than the threshold voltage. Set to 0 '(S18). (C) of FIG. 3 exemplarily illustrates the threshold voltage.

Subsequently, when the data of the music data block having a magnitude larger than the threshold voltage is retrieved, the signal processor 104 determines whether the data is the beginning of all (one song) music data (S20). As a result of this determination (S20), if it is not the first of all the music data, a series of music starting point search operations as shown in Fig. 4 is performed, and if it is the first of all the music data, the music data block is read while reading the corresponding music data block. It is determined whether there is data having a size larger than '0' among the data of the block (S22, S24). 4 (d) shows only data of a music data block having a size larger than a threshold.

As a result of the determination (S24), when the music data has a value greater than '0', the signal processing processor 104 registers the point as the first candidate point of the music start point and then the music start point as shown in FIG. Perform a search operation.

Subsequently, the signal processing processor 104 performs a signal processing process as shown in FIG. 4.

That is, the signal processing processor 104 reads the data of one music data block including the candidate point after the candidate point of the music start point is searched as described above (S30) and the candidate point whose size is not '0'. If found, the value of the searched current candidate point minus the previous searched previous candidate point is greater than or less than 4410 (in the present invention, since the music signal is sampled at 44.1Khz as described above, indicating a time of 0.1 second). It is determined (S34).

Subsequently, as a result of the determination (S34), the signal processing processor 104 determines that the current candidate point belongs to the same group as the previous candidate point if the sampling number between both candidate points is less than 4410 (S36). The position of the candidate point is stored but the number of music starting points is not increased, and the next data is read.

Subsequently, as a result of the determination (S34), the signal processing processor 104 registers the current candidate point as a new music start point and increases the number of music start points if the number of samplings between both candidate points is greater than 4410. The position and value of the music start point are stored (S38). That is, the signal processor 104 has more than 4410 sampling numbers (or time) between the current candidate point and the previous candidate point (the time is approximately 0.1 seconds since the present invention has a sampling frequency of 44.1Kz). Judging whether there is a lot, if more, it is registered as a music starting point, and if less, the candidate point is not registered as a music starting point.

Subsequently, the signal processor 104 determines whether the number of music starting points is two (S40). As a result of this determination (S40), if the number of music starting points is not two, the process proceeds to step S30 to repeat a series of operations, and if the number of music starting points is two, as shown in FIG. The processing will be performed.

An example of a music starting point searched as described above is illustrated in FIG. 5.

On the other hand, the music signal can be generally divided into the beginning portion of the music, the transition section proceeding from the beginning to the maximum value, and the attenuation section gradually decreasing from the maximum value to the next starting point as shown in FIG.

The music data post-processing means is the first at a point in time before the predetermined number of sampling points from the first music start point retrieved by the music data pre-processing means as shown in FIGS. 7 and 8 (a) and (b) Linear interpolation using the 2Khz interpolation method up to the maximum value of the music starting point, and a rhythm signal is generated by linearly interpolating from the maximum value of the first music starting point to a previous number of sampling points set in advance from the maximum value of the second music starting point ( S50, S52). Here, the number of samplings can be set by the user. In the present invention, the music starting point is searched by setting up to 1000 samples from the music starting point (the time of about 0.021 seconds in time since the present invention has a sampling frequency of 44.1Kz). The interval of the transition section is shown as α in FIG. 8.

Subsequently, the signal processing processor 104 outputs the linearly interpolated rhythm signal to the DAC 107 of the low frequency stimulus means (S56) and resets the number of music start points to '0'. The signal processing as described above is repeated.

As described above, the rhythm signal linearly interpolated into the transition section and the attenuation section around each music start point is output by the signal processing processor 104 to the low frequency stimulating means at the rear end, and thus the low frequency stimulating means is linearly interpolated rhythm. Massage is performed by oscillating low frequency so as to have stimulus intensity suitable for signal.

The low frequency stimulus means includes a DAC 107 for converting a digital rhythm signal generated by a signal processing processor () of the music data signal processing means into an analog signal and an analog rhythm signal converted by the DAC 107. A filter 108 for eliminating the surge voltage by passing only a low frequency signal, a mixer 109 and a pad 113 for mixing the rhythm signal passing through the filter 108 with the oscillation frequency generated by the local oscillator 106. The voltage regulator 110 for controlling the stimulus intensity of the amplifier, the amplifier 111 for amplifying to increase the voltage gain for the rhythm signal adjusted by the voltage regulator 110 and the low frequency signal output from the amplifier 111 In addition to adjusting the voltage value, the pad 113 in contact with the human body and the transformer 112 for electrically separating the system is configured to include. Each of the above components is operated by receiving power from the power supply 114.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims and their equivalents.

As described above, the present invention has an effect of performing a gentle massage operation by preventing a surge voltage even at a discontinuous point of a pulse.

In addition, the present invention has the effect that the massage effect is increased by performing massage while the speed and intensity of the low frequency stimulator are automatically changed in accordance with the rhythm of the music.

Claims (8)

In a typical low frequency stimulator, Music data management means for downloading and managing music data from a PC or the like; Music data signal processing means for receiving music data selected according to a user's request from the music data management means and generating a rhythm signal corresponding to the music data; And A low frequency stimulus means for converting the rhythm signal generated by the music data signal processing means into a low frequency signal and transmitting the same to a human body; The music data signal processing means, From the music data managed by the music data management means, the music data selected by the user is continuously read and signal processed to register music data larger than a threshold set by the user as a candidate point of the music starting point, and the registered candidate point Music data preprocessing means for registering as a music starting point when a time interval of two candidate points which are registered successively among them has a value greater than a preset time interval; And Linear interpolation from a time point corresponding to a preset sampling value to a maximum value of the first music starting point retrieved by the music data preprocessing means, and set in advance from the maximum value of the first music starting point to the previous direction of the second music starting point. And a music data post-processing means for generating a rhythm signal by linearly interpolating to a time point corresponding to the sampling value. The low frequency stimulator synchronized with the rhythm of music. delete delete delete The method of claim 1, The music data preprocessing means, Filtering means for filtering music data using a low pass filter; Rectifying means for rectifying the music data filtered by the filtering means; Normalization means for normalizing the music data rectified by the rectification means; And And undifferentiating means for undifferentiating music data normalized by said normalization means. The method of claim 1, The music data post-processing means, Linear interpolation from the time corresponding to the preset sampling value to the maximum value of the first music starting point searched by the music data preprocessing means, And a rhythm signal generated by linear interpolation from a maximum value of the first music starting point to a time point corresponding to a sampling value preset in the direction preceding the second music starting point. The method of claim 1, The low frequency stimulating means, A DAC for converting music data processed by the music data signal processing means into analog; A mixer for mixing the music signal output from the DAC and the oscillation frequency input from a local oscillator; A voltage regulator for adjusting the strength of the low frequency signal transmitted to the pad in contact with the human body; And And a transformer for coupling a low frequency signal voltage adjusted by the voltage regulator to a pad. The method of claim 7, wherein The low frequency stimulating means, And a low pass filter for removing the surge voltage of the rhythm signal processed from the DAC.

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