JP3948717B2 - Walking cycle fluctuation measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a walking cycle fluctuation measuring device that detects a walking cycle and measures a fluctuation characteristic of the walking cycle based on the detected walking cycle.
[0002]
[Prior art]
A healthy person's walking cycle shows 1 / f fluctuation. In addition, there are rhythms with fluctuations in the left foot and the right foot, and the left and right fluctuations are synchronized with each other. By measuring this fluctuation, it is possible to determine whether or not the patient is in a healthy state in light of the judgment criteria obtained empirically.
This fluctuation is caused by disorders of orthopedic motors such as trauma, internal diseases such as muscles and nerves, disturbance of nerve reflexes and rhythm generation in the spinal cord, and higher central nervous or mental disorders. However, it changes to a unique pattern. Of course, it changes only from stress.
[0003]
Various devices have been tried for measuring the fluctuation characteristics of the walking cycle. For example, a device that walks on a pressure-sensitive plate (force plate) measures several steps. I can only do it. Non-Patent Document 1 discloses a floor parallel installation type, Non-Patent Document 2 discloses a self-made walking path type, and Non-Patent Document 3 discloses an insole type. Non-Patent Documents 4 to 8 disclose ones using foot switches.
[0004]
[Non-Patent Document 1]
CROUSE J, WALL JC and MARBLE AE; Measurement of the temporal and spatial parameters of gait using a microcomputer based system.J.biomed Engng 9,64-68,1987
[Non-Patent Document 2]
GARDNER GM, MURRAY MP; A method of measuring the duration of foot-floor contact during walking.Phys.Ther. 11,751-756,1975
[Non-Patent Document 3]
GIFFORD G, HUGHES JA; Gait analysis system in clinical practice.J.biomed.Engng 5,297-301,1983
[Non-Patent Document 4]
ALEXANDERl I, CHAO EY and JOHNSON KA; The assessment of dynamic foot-to-ground contact forces and plantar pressure distribution; a review of the revolution current techniques and clinical applications.Foot Ankle 11,152-167,1990
[Non-Patent Document 5]
LIGGINS AB, BOWKER P; A simple low cost footswitch.J.biomed.Engng 13,87-88,1991
[Non-Patent Document 6]
MINNS RJ; A conductive rubber footswitch design for gait analysis.J.biomed.Engng 4,328-330,1982
[Non-Patent Document 7]
ROSS JD, ASHMANN RB; A thin foot switch.J.Biomechanics 20,733-734,1987
[Non-Patent Document 8]
WINTER DA, GREENLAW RK and HOBSON DA; A microswitch shoe for use in locomotion studies.J.Biomechanics, 5,553-554,1972
[0005]
[Problems to be solved by the invention]
Among those described above, the floor parallel installation type and the self-made walking path type have problems that the apparatus is large and expensive. The insole type has a problem that it is difficult to set the switching threshold.
Moreover, all of these and those using foot switches measure and calculate the fluctuation of the walking cycle after data is once recorded on a magnetic tape or the like by an analog data recorder. There is a problem of being affected by fluctuations of the equipment. In addition, there is a need for a device for storing analog data, and there is a problem that it takes time and effort to extract and analyze the stored data.
[0006]
The present invention has been made in view of the circumstances as described above. Since digital data is directly handled, the data processing / arithmetic circuit can be simplified and portable without being affected by fluctuations of analog devices. An object of the present invention is to provide an inexpensive and simple walking cycle fluctuation measuring device that is not limited to wiring and does not limit the measurement location.
[0007]
[Means for Solving the Problems]
In the walking cycle fluctuation measuring device according to the first aspect of the invention, the switches provided on the left and right soles are separated from the walking surface of the soles. / According to contact Off / on In the walking cycle fluctuation measuring device that detects each walking cycle of the left and right feet and measures the fluctuation characteristics of each walking cycle based on each detected walking cycle, the switch of the switch Off / on Means for wirelessly transmitting the status and the means transmitted by the means Off / on Receiving means for receiving the status, means for creating a clock of a predetermined period, and the receiving means received the clock created by the means Off / on Condition is Off to on And a counting means for counting during the time of change, wherein the fluctuation characteristics are measured based on the number of clocks counted a plurality of times.
[0008]
In this walking cycle fluctuation measuring device, the switches provided on the left and right soles are separated from the walking surface of the soles. / According to contact Off / on Thus, each walking cycle of the left and right feet is detected, and the fluctuation characteristics of each walking cycle are measured based on each detected walking cycle. The means of transmission is the switch on the left and right foot Off / on The status is transmitted wirelessly, and the receiving means sends it Off / on Receive status. The creating means creates a clock of a predetermined period, and the counting means receives the created clock by the receiving means. Off / on Condition is Off to on Fluctuation characteristics are measured based on the number of clocks counted a plurality of times by the counting means.
As a result, since digital data is directly handled, the data processing / arithmetic circuit can be simplified without being affected by the fluctuations of analog devices, and it is portable, inexpensive, and easy to use without being restricted by wiring and measuring location. A walking cycle fluctuation measuring device can be realized.
[0009]
A walking cycle fluctuation measuring device according to a second aspect of the present invention is the walking cycle fluctuation measuring device that detects the walking cycle and measures the fluctuation characteristics of the walking cycle based on the detected walking cycle. Switching means that operates according to the acceleration detected by the acceleration detector, means for generating a clock having a predetermined period, and a count for counting the clock generated by the means during the time when the switching means is operated. Means for measuring the fluctuation characteristics based on the number of clocks counted a plurality of times by the counting means.
[0010]
In this walking cycle fluctuation measuring device, the walking cycle is detected, and the fluctuation characteristic of the walking cycle is measured based on the detected walking cycle. The switch means operates according to the acceleration detected by the acceleration detector to be carried on the waist, and the creating means creates a clock with a predetermined period. The counting means counts the generated clock during the time when the switch means is operated, and measures the fluctuation characteristics based on the number of clocks counted a plurality of times by the counting means.
As a result, since digital data is directly handled, the data processing / arithmetic circuit can be simplified without being affected by fluctuations of analog devices, and can be integrated with a pedometer (registered trademark). An inexpensive and simple walking cycle fluctuation measuring device that is not restricted and the measurement place is not restricted can be realized.
[0011]
A walking cycle fluctuation measuring device according to a third aspect of the present invention comprises means for counting the number of times counted by the counting means, determination means for determining whether the number of times counted by the means has reached a predetermined number, and the determination means Means for outputting a sound for notifying that the predetermined number of times has been reached, and the counting means determines that the determination means has reached the predetermined number of times. In this case, the counting is stopped.
[0012]
In this walking cycle fluctuation measuring device, the counting means counts the number of times counted by the counting means, and the determination means determines whether or not the counted number has reached a predetermined number. When the output means determines that the determination means has reached the predetermined number of times, it outputs a sound for notifying that the predetermined number of times has been reached, and the counting means determines that the determination means has reached the predetermined number of times When the counting stops.
Thereby, the subject can be notified that the measurement is completed, and the subject does not have to perform the termination operation when the measurement is completed.
[0013]
A walking cycle fluctuation measuring device according to a fourth aspect of the present invention further comprises means for calculating an autocorrelation function of the time-series fluctuation of each clock number, and means for illustrating the autocorrelation function calculated by the means, The means is characterized in that the fluctuation characteristic is shown by the illustrated autocorrelation function.
[0014]
In this walking cycle fluctuation measuring device, the calculating means calculates the autocorrelation function of the time-series fluctuation of each clock number, and the illustrated means illustrates the calculated autocorrelation function, and the illustrated means is illustrated. Since the autocorrelation function shows the fluctuation characteristics of the walking cycle, it is easy to determine whether or not there is an abnormality in the fluctuation of the walking cycle.
[0015]
The walking cycle fluctuation measuring apparatus according to the fifth invention is characterized in that the predetermined cycle of the clock is set to 50 milliseconds or less.
[0016]
In this walking cycle fluctuation measuring device, the predetermined period of the clock is set to 50 milliseconds or less, so that the fluctuation of the walking cycle can be measured without causing a large error, and the measurer determines the characteristics of the fluctuation. I can do it.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
FIG. 1 is an explanatory diagram showing a usage pattern of the first embodiment of the walking cycle fluctuation measuring apparatus according to the present invention. In this walking cycle fluctuation measuring device, foot switches 4 (switches) attached to the heels of both feet of a subject are connected to a transmitter wireless network adapter 2 (transmission means) attached to a belt on the waist of the subject by a cord. It is connected.
[0018]
The foot switch 4 is a flat and flexible tape-like switch that can set a threshold value of the force to be switched by the elasticity of the base fiber, and the ON / OFF state thereof is confirmed (determined) through the transmission-side wireless network adapter 2.
The on / off state confirmed (determined) through the transmission-side wireless network adapter 2 is received through the reception-side wireless network adapter 3 (reception means) connected to the reception-side device 1 that is a personal computer, and is received by the reception-side device 1. Given.
Since the subject can walk freely without being aware of the measurement being performed within the range where the radio wave of the transmitting-side wireless network adapter 2 can reach, the measurement data of the fluctuation of the walking cycle that is not influenced by the subject's consciousness can be obtained. I can do it.
[0019]
FIG. 2 is a block diagram illustrating a configuration example of a main part of the walking cycle fluctuation measuring apparatus illustrated in FIG. 1. In this walking cycle fluctuation measuring device, left and right foot switches 4 are connected to a transmitting-side wireless network adapter 2.
The reception-side wireless network adapter 3 is connected to the I / O port 11 of the reception-side device 1, and the I / O port 11 includes a keyboard 6, a storage unit 9, a display 13 (means shown). ), The printer 12 and the information processing unit 10 are connected. The information processing unit 10 is connected to a counting unit 7 (counting unit) that counts a 10 msec clock created by the timing generator 8 (creating unit).
[0020]
Hereinafter, the operation of the walking cycle fluctuation measuring apparatus having such a configuration will be described with reference to the flowchart of FIG.
When the start operation is performed with the keyboard 6 or a mouse (not shown) (S2), the information processing unit 10 of the receiving device 1 resets the parameter N (S4).
When the walking cycle fluctuation is not being measured (S2), the information processing unit 10 returns to perform processing other than the walking cycle fluctuation measurement.
The transmitting-side wireless network adapter 2 outputs the on / off state of the foot switch 4.
[0021]
When the information processing unit 10 confirms that the right foot switch 4 is switched from OFF to ON through the receiving-side wireless network adapter 3 (S6), the information processing unit 10 causes the counting unit 7 to start counting the right foot (S8).
Next, when the information processing unit 10 confirms that the foot switch 4 of the left foot has been turned on from OFF through the receiving side wireless network adapter 3 (S10), the information processing unit 10 causes the counting unit 7 to start counting the left foot (S12). .
Note that the left and right foot switches 4 naturally return from on to off after being turned on from off, but the information processing unit 10 ignores this operation.
[0022]
Next, when the information processing unit 10 confirms that the right foot switch 4 is switched from OFF to ON through the receiving wireless network adapter 3 (S14), the information processing unit 10 causes the counting unit 7 to finish counting the right foot (S16). The counting result is stored in the storage unit 9 as walking cycle data of the right foot (S18), and the counting unit 7 is again started to count the right foot (S20).
Next, when the information processing unit 10 confirms that the foot switch 4 of the left foot has been turned on from OFF through the receiving side wireless network adapter 3 (S22), the counting unit 7 ends counting of the left foot (S24). The counting result is stored in the storage unit 9 as the left foot walking cycle data (S26).
[0023]
Next, the information processing unit 10 adds 1 to the parameter N (S28), and determines whether or not the added parameter N has reached 128 (S30).
When the parameter N has not reached 128 (S30), the information processing unit 10 causes the counting unit 7 to start counting the left foot again (S12), and the right foot switch 4 is connected via the receiving-side wireless network adapter 3. It waits to confirm that it has been turned on from off (S14). When it is confirmed that the right foot switch 4 is turned on from off, the counting unit 7 finishes counting the right foot (S16), and the counting result is stored in the storage unit 9 as the right foot walking cycle data (S18). .
[0024]
The information processing unit 10 repeats the above-described operation until the parameter N reaches 128 (S30). After the parameter N reaches 128 (S30), the left and right autocorrelation functions are calculated (S32). The left and right autocorrelation functions are displayed on the display 13 (S34) and the process returns. At this time, the calculated autocorrelation function can be printed by the printer 12.
[0025]
When the parameter N reaches 128 (S30), the storage unit 9 stores 128 walking cycle data for each of the right foot and the left foot, and when these are displayed on a graph, for example, as shown in FIG. . The number of samplings is from the first time (first step) to the 128th time (128th step on each of the left and right), which are arranged in time series. If these data are subjected to discrete Fourier transform, the power spectrum thereof is obtained and displayed in a logarithmic power spectrum-logarithmic frequency graph, if the subject is healthy, as shown in FIG. A graph close to the straight line will be shown.
Therefore, even if the power spectrum is obtained from the stored walking cycle data and displayed on the logarithmic power spectrum-logarithmic frequency graph, the presence or absence of the disease can be determined to some extent.
[0026]
The autocorrelation function deviates from the average value of the product f (t) f (t + τ) of the value f (t) at t and the value f (t + τ) at t + τ that fluctuates in time series or spatially. It is expressed as a function of τ. When the autocorrelation function of the data when the subject shown in FIG. 4 is healthy is illustrated, the left and right curves shown in FIG. 5 are gentle curves.
On the other hand, if the subject has a disease, it becomes a broken line with a significant bending frequency, as shown in FIGS. FIG. 6A is an example in the case where the influence of the peripheral disease is on the right foot, and FIG. 6B is an example in the case where the influence of the central disease is on the left foot.
Thus, if the autocorrelation function of the collected data is calculated and shown, it becomes easy to determine the position where the disease exists, the type of the disease, and the like.
[0027]
FIG. 8 shows an example (a) of collected data when the walking cycle is counted with a clock having a frequency of 50 milliseconds, and an example (b) of obtaining a power spectrum of the collected data and displaying it on a logarithmic power spectrum-logarithmic frequency graph. ).
On the other hand, FIG. 9 shows an example (a) of collected data when the walking cycle is counted with a clock having a frequency of 100 milliseconds, and the power spectrum of the collected data is obtained from the same subject. It is the example (b) displayed on the graph of frequency.
8 and 9, it can be seen that the fluctuation characteristics of the walking cycle can be measured by counting with a clock having a frequency of 50 milliseconds or less.
[0028]
Embodiment 2. FIG.
FIG. 10 is an explanatory diagram showing a usage pattern of the second embodiment of the walking cycle fluctuation measuring apparatus according to the present invention. This walking cycle fluctuation measuring device 20 is used by being attached to a belt on the waist of a subject. The walking cycle fluctuation measuring device 20 includes an acceleration detector, and detects the acceleration in the horizontal direction or the vertical direction that occurs as the subject walks. In this case, the right foot and the left foot are not distinguished, but the fluctuation of each walking cycle can be measured.
Since the subject can freely walk without being aware that the measurement is being performed, measurement data of the walking cycle fluctuation that is not affected by the subject's consciousness can be obtained.
[0029]
FIG. 11 is a block diagram illustrating a configuration example of a main part of the walking cycle fluctuation measuring apparatus illustrated in FIG. 10. The walking cycle fluctuation measuring device 20 is an acceleration detector and a switch that is turned on when the acceleration detected by the acceleration detector exceeds a predetermined acceleration and turned off when the acceleration falls below a predetermined acceleration lower than the predetermined acceleration. An acceleration switch 28 (switch means) consisting of the following is connected to the I / O port 26. Chattering is prevented by making the acceleration at which the switch turns on / off different.
In addition, an operation unit 27, a storage unit 24, a display 25 (means shown), an information processing unit 23, and a buzzer 29 (means for outputting sound) are connected to the I / O port 26. The information processing unit 23 is connected to a counting unit 22 (counting unit) that counts the 10-msec clock generated by the timing generator 21 (creating unit).
[0030]
Below, operation | movement of the walking period fluctuation measuring apparatus 20 of such a structure is demonstrated, referring the flowchart of FIG. 12 which shows it.
When the start operation is performed on the operation unit 27 (S40), the information processing unit 23 resets the parameter N (S42), rings the buzzer 29 (S43), and the walking cycle fluctuation measuring device 20 starts measuring the subject. Make sure you have done that.
When the start operation is not performed (S40), the information processing unit 23 determines whether the operation unit 27 performs a power-off operation (S64). If the power-off operation is not performed, the information processing unit 23 starts the operation unit 27. It is determined whether or not an operation has been performed (S40). If the power is turned off (S64), the power is turned off (S66) and the process is terminated.
[0031]
After the buzzer 29 is ringed (S43) and the acceleration switch 28 is turned on (S44), the information processing unit 23 causes the counting unit 22 to start counting (S46). The acceleration switch 28 naturally returns from on to off after being turned on from off, but the information processing unit 23 ignores the operation of returning from on to off.
Next, when the acceleration switch 28 is turned on from off (S48), the information processing unit 23 causes the counting unit 22 to finish counting (S50), and stores the counting result in the storage unit 24 as walking cycle data (S52). ).
[0032]
Next, the information processing section 23 adds 1 to the parameter N (S54), and determines whether or not the added parameter N has reached 256 (S56).
When the parameter N has not reached 256 (S56), the information processing unit 23 causes the counting unit 22 to start counting (S46), waits for the acceleration switch 28 to be turned on (S48), and the acceleration switch When 28 is turned on from off, the counting unit 22 finishes counting (S50).
[0033]
The information processing unit 23 repeats the above-described operation until the parameter N reaches 256 (S56). When the parameter N reaches 256 (S56), the buzzer 29 is sounded (S58), and the subject finishes the measurement. Notice.
At this time, the storage unit 24 stores 256 walking cycle data, and when this is displayed on a graph, it becomes the same as the graph shown on either the left or right side of FIG. However, the sampling number is from the first time (first step) to the 256th time (256th step with both feet). If these data are subjected to discrete Fourier transform, the power spectrum thereof is obtained, and displayed on a logarithmic power spectrum-logarithmic frequency graph, if the subject is healthy, as shown on either the left or right side of FIG. A graph close to a straight line of f will be shown.
[0034]
In addition, since the left and right foot data are alternately arranged in 256 walking cycle data, the left and right cannot be specified if they are arranged every other one, but can be used as the respective walking cycle data. In addition, it is possible to specify left and right by determining from which foot to start walking after the start of measurement.
[0035]
The information processing unit 23 sounds the buzzer 29 (S58), calculates the autocorrelation function of the data stored in the storage unit 24 (S60), and starts displaying the calculated autocorrelation function on the display 25. (S62) Return.
The description of the autocorrelation function is the same as that in the first embodiment, and the subject can determine whether or not there is an abnormality in the body based on the graph of the autocorrelation function displayed on the display 25. Is possible.
[0036]
Next, the information processing unit 23 determines whether or not a power-off operation has been performed by the operation unit 27 (S64). If the power-off operation has not been performed, the information processing unit 23 determines whether or not a start operation has been performed by the operation unit 27. (S40). If the power is turned off (S64), the power is turned off (S66) and the process is terminated.
Since the walking cycle fluctuation measuring device 20 described in the second embodiment can be housed in a small housing, for example, it is housed in the same housing as a pedometer and the walking cycle is counted while counting the number of steps. It is also possible to measure so as to be able to judge physical abnormalities.
[0037]
Embodiment 3 FIG.
FIG. 13 is a block diagram showing a configuration example of the third embodiment of the walking cycle fluctuation measuring apparatus according to the present invention. The walking cycle fluctuation measuring device 20 a includes an acceleration detector 30 and an AD converter 31 that performs analog / digital conversion of an acceleration detection signal detected by the acceleration detector 30 and supplies the signal to the I / O port 26. Other configurations are the same except for the walking cycle fluctuation measuring device 20 shown in FIG.
The usage pattern of the walking cycle fluctuation measuring device 20a is the same as the usage pattern of the walking cycle fluctuation measuring device 20 shown in FIG.
[0038]
The walking cycle fluctuation measuring device 20a measures the walking interval time based on the increase or decrease of the acceleration in the horizontal direction or the vertical direction. The acceleration detected by the acceleration detector 30 while the subject is walking and read in the sampling period changes as shown in FIG. Therefore, after a predetermined time (for example, a safety time of about 0.3 seconds) from the time A when the acceleration exceeds 0 and becomes positive, after the time B when the acceleration changes from positive to negative, the time after A becomes negative. Then, after a predetermined time, the time from the positive point to the negative point B is measured.
[0039]
FIG. 14 (a) shows the case of a normal walking speed and a small stride, (b) shows the case of a slow walking speed and a small stride, and (c) shows a slightly large stride at a normal walking speed. Is the case. In any case, it can be seen that the change in acceleration is stable at time B when the acceleration is reversed from positive to negative.
Further, since the walking cycle fluctuation measuring device 20a has the above-described configuration, chattering may be ignored depending on the setting because the on / off switch is not used and sampling is performed discretely. I can do it.
[0040]
Hereinafter, the operation of the walking cycle fluctuation measuring apparatus 20a having such a configuration will be described with reference to the flowchart of FIG.
When the start operation is performed by the operation unit 27 (S70), the information processing unit 23 sounds the buzzer 29 (S72), causes the subject to confirm that the walking cycle fluctuation measurement device 20a has started measurement, and sets the parameter N. Reset (S74).
When the start operation is not performed (S70), the information processing unit 23 determines whether the operation unit 27 performs a power-off operation (S112). If the power-off operation is not performed, the information processing unit 23 starts the operation unit 27. It is determined whether or not an operation has been performed (S70). If a power-off operation is performed (S112), the power is turned off (S114) and the process ends.
[0041]
After resetting the parameter N (S74), the information processing unit 23 reads the acceleration (S76), and when the acceleration changes from negative to positive (S78), after waiting for 0.3 seconds (S80), Further, acceleration is read (S82).
Next, when the acceleration changes from positive to negative (S84), the information processing unit 23 causes the counting unit 22 to start counting the clock (S86).
[0042]
Next, the information processing section 23 reads the acceleration (S88), and when the acceleration changes from negative to positive (S90), waits for 0.3 seconds (S92), and then reads the acceleration again. (S94).
Next, when the acceleration changes from positive to negative (S96), the information processing unit 23 causes the counting unit 22 to finish counting the clock (S98), and stores the counting result in the storage unit 24 as walking cycle data (S100). ).
Next, the information processing section 23 adds 1 to the parameter N (S102), and determines whether or not the added parameter N has reached 256 (S104).
When the parameter N has not reached 256 (S104), the information processing section 23 causes the counting section 22 to start counting (S86) and reads the acceleration (S88).
[0043]
The information processing unit 23 repeats the above-described operation until the parameter N reaches 256 (S104). When the parameter N reaches 256 (S104), the buzzer 29 is sounded (S106), and the subject finishes the measurement. Notice.
The information processing unit 23 sounds the buzzer 29 (S106), calculates the autocorrelation function of the data stored in the storage unit 24 (S108), and starts displaying the calculated autocorrelation function on the display 25. (S110).
[0044]
Next, the information processing unit 23 determines whether or not a power-off operation has been performed by the operation unit 27 (S112). If the power-off operation has not been performed, the information processing unit 23 determines whether or not a start operation has been performed by the operation unit 27. (S70). If the power is turned off (S112), the power is turned off (S114) and the process is terminated. The description of other operations is the same as the description of the operations described in the second embodiment, and will not be repeated.
[0045]
【The invention's effect】
According to the walking cycle fluctuation measuring apparatus according to the first aspect of the invention, since digital data is directly handled, the data processing / arithmetic circuit can be simplified and portable without being affected by fluctuations of analog equipment, and limited to wiring. An inexpensive and simple walking cycle fluctuation measuring device that is not restricted and the measurement location is not limited can be realized.
[0046]
According to the walking cycle fluctuation measuring apparatus according to the second invention, since digital data is directly handled, the data processing / arithmetic circuit can be simplified and integrated with a pedometer without being affected by fluctuations of analog equipment. Therefore, it is possible to realize an inexpensive and simple walking cycle fluctuation measuring device that is not limited to wiring and is not limited to a measurement location.
[0047]
According to the walking cycle fluctuation measuring apparatus according to the third aspect of the invention, the subject can be notified that the measurement has been completed, and the subject does not have to perform the termination operation when the measurement is completed.
[0048]
According to the walking cycle fluctuation measuring apparatus according to the fourth invention, it is easy to determine whether or not there is an abnormality in the fluctuation of the walking cycle.
[0049]
According to the walking cycle fluctuation measuring apparatus according to the fifth aspect of the present invention, the fluctuation of the walking cycle can be measured without causing a large error, and the measurer can determine the characteristics of the fluctuation.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a usage pattern of an embodiment of a walking cycle fluctuation measuring apparatus according to the present invention.
2 is a block diagram showing an example of a configuration of a main part of the walking cycle fluctuation measuring apparatus shown in FIG. 1. FIG.
FIG. 3 is a flowchart showing the operation of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 4 is a graph showing an example of measurement data of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 5 is a graph showing an example of an autocorrelation function of measurement data of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 6 is a graph showing an example of an autocorrelation function of measurement data of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 7 is a graph showing an example of a power spectrum of measurement data of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 8 is a graph showing measurement data and its power spectrum for explaining the period of the measurement clock of the walking period fluctuation measuring device according to the present invention.
FIG. 9 is a graph showing measurement data and its power spectrum for explaining the period of the measurement clock of the walking period fluctuation measuring device according to the present invention.
FIG. 10 is an explanatory diagram showing a usage pattern of the embodiment of the walking cycle fluctuation measuring device according to the present invention.
11 is a block diagram illustrating an exemplary configuration of a main part of the walking cycle fluctuation measuring apparatus illustrated in FIG. 10;
FIG. 12 is a flowchart showing the operation of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 13 is a block diagram showing a main configuration of an embodiment of a walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 14 is an explanatory diagram showing the operation of the walking cycle fluctuation measuring apparatus according to the present invention.
FIG. 15 is a flowchart showing the operation of the walking cycle fluctuation measuring apparatus according to the present invention.
[Explanation of symbols]
1 Receiving device
2 Sending side wireless network adapter (transmission means)
3 Receiving side wireless network adapter (reception means)
4 Foot switch (switch)
7,22 Counting unit (counting means)
8,21 Timing generator (means to create)
9,24 storage unit
10, 23 Information processing section
13, 25 display (means shown)
20 Walking cycle fluctuation measuring device
28 Acceleration switch (acceleration detector, switch)
29 Buzzer (means to output sound)
30 Acceleration detector
31 AD converter

Claims (5)

The switches provided on the left and right soles are turned off / on according to the separation / contact with the walking surface of the soles to detect each walking cycle of the left and right feet, and based on each detected walking cycle, In the walking cycle fluctuation measuring device for measuring the fluctuation characteristics of each of the walking cycles,
Means for wirelessly transmitting the off / on state of the switch, receiving means for receiving the off / on state transmitted by the means, means for creating a clock of a predetermined period, and a clock created by the means, Counting means for counting during the time when the off / on state received by the receiving means changes from off to on, and the fluctuation means should measure the fluctuation characteristics based on the number of clocks counted a plurality of times. A walking cycle fluctuation measuring device characterized by being made. In the walking cycle fluctuation measuring device for detecting the walking cycle and measuring the fluctuation characteristics of the walking cycle based on the detected walking cycle,
An acceleration detector to be carried on the waist, a switch means that operates in accordance with the acceleration detected by the acceleration detector, a means for generating a clock having a predetermined period, and a clock generated by the means is operated by the switch means. A walking period fluctuation measuring apparatus, characterized in that the fluctuation means includes a counting means for counting between the time points, and the characteristic of the fluctuation is measured based on the number of clocks counted by the counting means a plurality of times. Means for counting the number of times counted by the counting means, determination means for determining whether the number of times counted by the means has reached a predetermined number of times, and when determining that the determination means has reached a predetermined number of times, Means for outputting a sound for notifying that the predetermined number of times has been reached, and the counting means is adapted to stop counting when the determining means determines that the predetermined number of times has been reached. The walking cycle fluctuation measuring device according to claim 2. Means for calculating an autocorrelation function of the time-series fluctuation of each clock number, and means for illustrating the autocorrelation function calculated by the means; The walking cycle fluctuation measuring device according to any one of claims 1 to 3, wherein the walking cycle fluctuation measuring device is designed to exhibit characteristics. The walking cycle fluctuation measuring device according to any one of claims 1 to 4, wherein the predetermined cycle of the clock is set to 50 milliseconds or less.

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