JP2002078697A - Body action sensing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body action sensing instrument capable of sensing user's body actions including evaluation information of a walk and rehabilitation of a cerebropathic patient, judging whether or not the actions are prescribed actions to display the information, and providing the person himself/herself or a observing person with the information for evaluation. SOLUTION: The body action sensing instrument has a function of judging types and strength of body actions based on a combination of the results of prescribed computation (e.g. dispersion of sensed waveform) on an acceleration output and rotational angular speed which are measured by a device at body side (e.g. wrist watch type) including an action sensor capable of sensing an acceleration in one direction (e.g. vertical direction) and a rotational angular speed in one surface (e.g. including forward/backward direction and vertical direction), and a function of displaying the results.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body movement sensing device capable of detecting a movement performed by a body and providing the information to an observer.

[0002]

2. Description of the Related Art There are many proposals for inventions which are attached to the body of a user, detect the movement of the body with a sensor, judge the exercise state of the user based on the data, and use the data for the purpose of health management and the like.
For example, (1) In the technology disclosed in Japanese Patent Application Laid-Open No. H10-2955651, a portable terminal having an accelerometer worn on the user (for example, at the waist) uses the personal data inputted and the exercise amount automatically measured. A telephone is sent to an external center computer for analysis and health checkup, and the result is received and displayed.

(2) In the technique disclosed in Japanese Patent Application Laid-Open No. 2000-41953, a body motion detected by a body motion sensor of a behavior data collection device (a user's body side) is primarily processed, and the behavior is received. The data output device (external personal computer side) outputs data that has been subjected to secondary processing using personal information. This eliminates the need for inputting personal information and storing a large amount of secondary processing information on the biological information collection device side, thereby reducing operability and memory capacity. (3) In Japanese Patent Application Laid-Open No. 2000-41952, in order to reduce the memory capacity of the behavior information detection device, the number of steps, walking pace, type of behavior, exercise intensity, Calculate biometric information such as consumed calories, and store, display, or transmit the calculation result every minute.

(4) In addition, a pedometer (pedometer (registered trademark)), a multifunctional wristwatch, or the like has a built-in acceleration sensor, measures the number of steps and exercise intensity, and provides health management information such as calorie consumption by exercise. It seems that there were also products and documents that let them know about the product. (5) In addition to the acceleration sensor, a rotational angular velocity sensor such as a vibrating gyroscope is added and specified for the purpose of monitoring the operation of a patient with a disability in behavior or performing emergency automatic notification for medical management purposes. Studies and experiments aimed at detecting the movement of humans have been reported in related academic societies. (6) On the other hand, looking at the motion sensor technology, the acceleration and the angular velocity are conventionally measured by separate sensors. Particularly in angular velocity sensors, a vibration gyroscope using a free bar or a two-leg tuning fork as a vibrator for detecting Coriolis force is being put into practical use.

[0005]

The above conventional example (1),
Looking at each embodiment of the invention in (2) and (3),
It cannot be said that a body-side device that is still sufficiently small and has a small burden on the user (often a patient with a physical disability) due to wearing is small. In the conventional example (4), progress has been made in terms of miniaturization of the device, but in these conventional examples, the information to be obtained is within the range of health management of healthy persons, and for example, such as evaluation of rehabilitation of patients. It is not a technology that can be used immediately for medical purposes.

[0006] Although the purpose of the study of the above conventional example (5) is in common with the present invention in that the purpose of the study is to improve medical technology, the specific purpose is to detect a specific disease and detect an action related thereto. There are many parts that are difficult to directly apply to the present invention, in which the movement of a palsy patient due to cerebral infarction is also taken into the field of view (for example, exercise that imposes a burden on the circulatory system disease and cardiac function).
In addition, there seems to be little mention of a specific optimal technique for actually mounting the motion sensor on the patient.

In the angular velocity sensor of the prior art cited in the prior art (6), the rotation axis capable of detecting the angular velocity is parallel to the longitudinal axis of the two-leg tuning fork or the rod-shaped vibrating body, that is, the rotational plane capable of being detected is the longitudinal axis. It is vertical. This necessarily increases the thickness of the bodyside device when the detectable plane of rotation is parallel to the main surface of the device worn on the body. Further, if the acceleration sensor and the angular velocity sensor are separate bodies, the body-side device becomes large. Under these circumstances, it is difficult at present to reduce the size and thickness of the device in order to reduce the burden of mounting. In many cases, other types of sensors have been proposed.

[0008] An object of the present invention is to detect the movement of the body of a user, determine that the movement is a predetermined movement, display the information, and provide the information to the person or the observer. It is to provide a high body motion sensing device. Another object of the present invention is to provide a body movement sensing device that enables at least walking measurement and rehabilitation evaluation.

[0009]

Means for Solving the Problems To achieve the above object, the body movement sensing device of the present invention has the following features. (1) A motion sensor capable of measuring an acceleration in one direction and a rotational angular velocity around one axis, and measuring the acceleration in the one direction and the rotational angular velocity around one axis for a predetermined period by the motion sensor. A body-side device that includes measurement circuit means and is attached to a predetermined part of the body; arithmetic circuit means for performing predetermined arithmetic operations on acceleration output and angular velocity output of the measurement circuit means; Determination circuit means for determining the type and intensity of the physical exercise in the predetermined period by a combination of the obtained acceleration output and angular velocity output, and display means for displaying the determined type and intensity of the physical exercise or the evaluation result thereof Having

[0010] The body movement sensing device of the present invention may further include at least one of the following features. (2) The motion sensor, the measurement circuit means, the arithmetic circuit means, the determination circuit means, and the display means
All must be built into a body-side device that is worn on a prescribed part of the body.

(3) Of the motion sensor, the measurement circuit means, the arithmetic circuit means, the judgment circuit means, and the display means, at least the motion sensor and the measurement circuit means are provided for a predetermined body. The body-side device attached to the part is built in, the other means is built-in to an external device that is not worn on the body, and the body-side device is provided with intermediate data transmission means, the external device is the Provision of means for receiving intermediate data.

(4) The acceleration in one direction detected by the motion sensor is substantially vertical acceleration of the body, and the angular velocity in one direction detected by the motion sensor is substantially vertical and forward and backward directions of the body. Angular velocity for rotational motion in the plane that contains it.

(5) The body-side device is a device to be worn on an arm, in which the angular velocity sensor section of the motion sensor is housed in a thin box-shaped container, and is the widest of the body-side device. The angular velocity sensor is arranged so as to be substantially parallel to the surface, and the rotational direction of detection of the angular velocity sensor is substantially parallel to the widest surface of the box-shaped container.

(6) The body-side device has a display device on the main surface thereof, and the box-shaped container of the motion sensor contains an integrated acceleration sensor and an angular velocity sensor. The container of the motion sensor is disposed in the body-side device substantially parallel to the display device, and the direction of acceleration detection of the motion sensor is a direction substantially parallel to the widest surface of the box-shaped container. thing.

(7) The predetermined calculation is to obtain a variance of at least one of the acceleration output and the angular velocity output.

(8) The predetermined calculation is to obtain a variance of at least one of the acceleration output and the angular velocity output, and further take a logarithm thereof.

[0017]

FIG. 1 is a block diagram of a first embodiment of a body movement sensing device according to the present invention. This device is a body-side device 1 that a user attaches to a predetermined part of the body.
And an external device 2 installed at a location like a medical center, for example. The internal configuration of the body-side device 1 includes an acceleration sensor 11 that detects acceleration in a specific direction, an angular velocity sensor 12 that detects an angular velocity of rotation parallel to a specific surface, and an excitation of these sensors that are mechanical vibrators. (The drive signals are P130 and P140) Also, the acceleration measurement circuit 13 and the angular velocity measurement circuit 14 which extract the detection signals P11 and P12 of the acceleration and the angular velocity, perform processing such as detection and amplification, and output a voltage proportional to the detected value, respectively. Contains.

The acceleration output P13 and the angular velocity output P14 within a predetermined period (various conceivable, such as being determined by the user himself or by a meeting between the user and a medical staff in advance, or the apparatus being determined by his / her own clock) are respectively considered. A predetermined operation is performed by the acceleration operation circuit 15 and the angular velocity operation circuit 16. The predetermined calculation is to process the waveforms of the signals P13 and P14 to convert the signals. For example, the peak value of the input waveform is extracted, the rectification / smoothing is performed, and the average is obtained. Calculate the variance of the peak value of the above, obtain the variance by sampling the signal in a predetermined period finely, obtain the logarithm thereof, or perform other mathematical processing, and calculate the period of the oscillating waveform And so on. The movement data, which are the outputs, are an acceleration calculation output P15 and an angular velocity calculation output P
Sixteen. These two outputs are transmitted together by the communication circuit 22 to the external device 2 as, for example, a radio wave output P22. Data transmission and reception are performed bidirectionally while the two communication circuits 22 and 23 cooperate and check each other's operations. Further, the control circuit 24 acts on each circuit in the body-side device 1, and controls signals P241, P242, P243, P24
4. Generates P245 and has a role of adjusting the operation timing of each circuit and the cooperative operation between the circuits.

The configuration and operation of the external device 2 are as follows. The communication circuit 23 that has received the exercise data included in the radio signal P22 demodulates it and converts it into an internal signal P23. The motion judging circuit 17 receives the internal signal P23, compares the two types of information included in the internal signal P23, that is, the acceleration calculation output and the angular velocity calculation output, with the respective numerical ranges previously obtained experimentally for some types of motion. Then, the type and the intensity of the exercise performed by the user during a certain period are determined. Alternatively, information on the evaluation of the determined exercise (for example, progress of rehabilitation) is also added.

The determination result signal P17 including the information is stored in the storage device 19 and sent to the display device 18 (including necessary circuits) to transmit the contents (kind of exercise, intensity,
The evaluation) is displayed together with the personal information of the user registered in advance, and is recorded in the recording device 21 to enable diagnosis of an observer such as a medical staff. Further, the storage signal P19 including the stored content is reproduced as needed by the reproduction circuit 20 as the reproduction signal P20, and displayed by the display device 18. The control circuit 26 operates on each circuit in the external device 2, receives the reception signal P231, and controls the control signals P251, P252, P253, P254, P255,
P256 is generated to adjust the operation timing of each circuit and the cooperative operation between the circuits.

FIG. 2 is a block diagram of a second embodiment of the body movement sensing device according to the present invention. In this example, the necessary circuits and the display device 1 already described in the body-side device 1
8 (the communication circuit becomes unnecessary), and there is an advantage that the information of the exercise situation and its evaluation is displayed and the user (wearer) himself can confirm it. Of course, the stored information can be reproduced later by the reproduction circuit 20 so as to be confirmed by a third party or the like or recorded in an external device. The control circuit 26 acts on each circuit in the body-side device 1, generates control signals P261, P262, P263, P264, and P265, and adjusts the operation timing of each circuit and the cooperative operation between each circuit.

FIGS. 3A and 3B show an example of the body-side device according to the embodiment of the present invention, wherein FIG. 3A is a partial plan view, and FIG. The body-side device 3 is substantially in the form of a wristwatch, and is provided with a band 36 around the arm and can be worn on the wrist. Motion sensor 31 and display device 3 as main components
2, the communication circuit module 33, the battery 34 as a power supply, and the operation switch 35 are shown. The body-side device 3 must be thin and small so that wearing does not burden the user.
The display device 32 is arranged on the widest surface of the body-side device 3 corresponding to the display surface of the wristwatch when importance is placed on visibility. The motion sensor 31 is also arranged on the same plane, and therefore parallel to the display device 32. Since the display device 32 can be a thin type such as a liquid crystal display panel, the motion sensor 31 must also be contained in a sufficiently thin package.

The reason for disposing the motion sensor 31 in parallel with the display device 32 is as follows. The optimal motion detection direction is
From the experimental results as described later, the acceleration indicates a linear motion in the vertical direction (vertical direction) of the body, that is, the X direction shown in FIG. 3A, and the rotation angular velocity indicates a rotation in a plane including both the vertical direction and the front-back direction of the body. (Ω direction in the figure), that is, a rotational movement around a horizontal rotation axis (parallel to the illustrated Z axis) in the left-right direction of the body. The body-side device 3 is like a wristwatch,
Assuming that the display surface is worn on the back side or palm side of the wrist (this is the most natural and desirable), when the upper body is upright and the elbow is naturally bent and stretched, the rotating surface is the display surface of the body-side device 3, that is, Since the sensor is parallel to the display device 32, if there is a thin angular velocity sensor having a rotation detection surface parallel to the widest surface, it is preferable to dispose the motion sensor 31 including it inside the display device 32 in parallel.

FIG. 4 is a plan view showing an internal structure of an example of the motion sensor according to the embodiment of the present invention. The structure of the motion sensor satisfies all of the above requirements regarding the shape, arrangement, and detection direction. Numeral 40 denotes a thin box-shaped airtight (preferably vacuum) container from which a lid (the ceiling portion of the container) has been removed to show the internal structure. Reference numeral 41 denotes a number of hermetic terminal pins penetrating the bottom of the container. Each pin is connected to each of the electrode film groups on the motion sensor vibrating body 50 by, for example, a wire bonding method, but the electrode film and the bonding wires are not shown. The motion sensor vibrating body 50 is formed from a single flat plate of a piezoelectric material, and the acceleration sensor unit and the angular velocity sensor unit are integrated. The motion sensor vibrator 50 includes a fixed portion A52 (shaded portion) on the back surface of the total base portion 51 and a fixed portion B64 (shaded portion) having a small area.
Is adhered and supported on a pedestal (not shown) on the container 40 side.

The angular velocity sensor section is a so-called tripod tuning fork-shaped portion, and the outer leg A53 and the outer leg B5 are parallel to each other.
5, a middle leg C54, a tuning fork base 56, and a fulcrum 57. The outer leg A53 and the outer leg B55 each have a cantilever shape and oscillate symmetrically with respect to an axis of symmetry (not shown) in the same manner as a normal two-legged tuning fork.
Excitation is performed at a constant amplitude by an excitation circuit (oscillation circuit) included in 13). The middle leg C54 is not excited, but has a surface electrode for detecting its deflection.
58A, 58 shown with hatching different from the fixing portion
B and 58C are additional masses, each of which is made of a thick metal plating layer applied to the tip of the leg to lower the natural frequency and make them equal to each other (the natural frequency of the middle leg C54 is the natural frequency of both outer legs). May be appropriately differentiated).

Now, when the motion sensor 50 rotates at an angular velocity Ω in the direction shown in the drawing, that is, about a rotation axis parallel to the Z axis perpendicular to the paper surface, Coriolis force proportional to the angular velocity Ω acts on both outer vibrating legs. . The direction is the longitudinal direction of the leg, and when a force toward the tip of the leg acts on the outer leg A53 at a certain moment, the outer leg B
A force is applied to 55 toward the base of the leg. The direction of the force changes sinusoidally in synchronization with the vibration of the legs and periodically reverses. 2
The two forces constitute a couple because the outer legs are separated in parallel,
The tuning fork base 56 is shaken, and a minute rotational vibration is generated around the fulcrum 57. When the vibration of the tuning fork base 56 caused by the moment due to the Coriolis force is sensed, the middle leg C54 vibrates with an amplitude proportional to the Coriolis force. The vibration voltage extracted by the detection electrode provided on the middle leg C54 is the detection signal of the angular velocity (P11 in FIG. 1).

The acceleration sensor portion of the motion sensor 50 includes a pair of parallel vibrating spring portions, a bar A61, a bar B62, and a load mass 60 (partial mass of a material plate having a large area and thick plating applied to the surface thereof). Two support springs 63 (members for supporting the load mass 60 and allowing a minute displacement in the Z direction in the figure), and fixing portions B (the load mass 60 is largely displaced particularly in the X direction). Part for supporting and fixing so that it does not occur. Bars A61 and B6, each fixed at both ends
Numeral 2 denotes an oscillation circuit (eg, an angular velocity measurement circuit 14 shown in FIG.
Is included).

Although the oscillation frequency is normally constant, when an acceleration in the X direction shown in the figure acts on the load mass 60, the load mass 60 compresses the rod A61 and the rod B62 in the longitudinal direction with a force proportional to the magnitude. The oscillation frequency is increased or decreased depending on the direction and magnitude of the force. Therefore, the acceleration in the X-axis direction can be obtained by comparing the separately provided reference frequency with the above oscillation frequency and knowing the direction and amount of change of the oscillation frequency. The external leg A5, which is not provided with the reference frequency source and is instead a vibrating body for the angular velocity sensor
3. There is also a possibility that the oscillation frequency of B55 can be used.

Next, various experiments performed to determine an optimum embodiment of the present invention will be described with reference to FIGS. First, FIG. 5 is an explanatory view of an experimental situation of a vibration response in body motion sensing. The human body 4 as a subject was erected, one leg was placed on the fixed table 5, and the other leg was placed on a table of a vibrator 6 vibrating in the vertical direction. The X, Y, and Z coordinate axes were set based on the human body 4 as shown in the figure. Human body 4
A black circle attached to indicates a site where the acceleration sensor is mounted.
First, the response of the sensor attached to each part to the vibration in the X direction (vertical direction) was obtained. Excitation is 4.9 sine wave
5 to 1000 Hz was swept at a constant acceleration of m / s * s. Note that the acceleration in the X direction is also essential data for calculating calorie consumption in ordinary exercise such as walking.

FIG. 6 is a graph showing the experimental results of the vibration response in the Z direction of the acceleration sensor attached to each part of the body when one sole is vibrated under the above experimental conditions. The horizontal axis is the vibration frequency. The vertical axis indicates the detected acceleration on a logarithmic scale. (A) crown, (b) chest pocket, (c) waist belt, (d) ankle, (e) wrist with extended elbow,
(F) is a case where each arm is attached to a wrist whose elbow is bent and leveled. (C) waist belt, (d) ankle, (e) elbow extended, (f) wrist with elbow bent. The two parts, which are mounted on a symmetrical part with respect to the left and right surfaces, are shown on the same diagram for easy comparison. Looking at these data, there is almost no difference between the response on the excitation side and the response on the symmetric side in the figure (e), and the waveform is the gentlest. In addition, the sole vibration having a frequency of about 20 Hz or more has a low transmissibility, and is expected to be stable in the detection of walking or running without being affected by the hardness of footwear or the ground. For these reasons, it can be seen that wearing a sensor on the wrist is generally best, unless the purpose is to measure a specific body part.

Next, motion detection of a "finger-nose test", which is an example of a test performed to evaluate the degree of a medical condition of a hemiplegic patient due to cerebral infarction, is performed by using an acceleration sensor and an angular velocity sensor attached to a wrist. I went. This allows the subject to repeatedly move his finger to his nose in accordance with the metronome signal. FIG. 7 is a graph showing the measurement results of the right and left hand movements in the finger-nose test as detection waveforms as they are, with the horizontal axis representing time (seconds) and the vertical axis representing detection values.
(A) and (b) show the case of a healthy person A, (c) and (d) show the case of a healthy person B, (e) and (f) show the case of a patient with left upper limb paralysis. As can be seen from these figures, the movement of the hand on either side has smooth and constant rhythms both in acceleration and angular velocity in the two healthy subjects, but the movement tempo is slow and the waveform is disturbed in hemiplegic patients. In particular, in the case of the upper limb on the paralyzed side, it is remarkable, so that the severity of the symptoms and the degree of improvement compared with the past data can be easily determined, and that the wrist-type body-side device is extremely effective. Understand.

Next, an experiment was conducted in which several types of walking were identified by using a motion sensor correctly mounted on the wrist using the measurement results of the acceleration and angular velocity in each direction. The coordinate axes are as shown in FIG. 5, the X axis is the vertical axis of the upright body, the Y axis is the front and rear axis, and the Z axis is the horizontal left and right axis. Subjects are 20-4
14 males and females in their 0s, the types of exercise are normal walking, fast walking, jogging, running, arm-restricted walking (arm folded, pocketed,
Data collection was performed for 20 steps or 50 steps collectively. The detected waveform is not processed as it is but is processed by processing. One is to detect the peak of the vibration (each peak value of the oscillating voltage waveform output from the measuring circuit according to walking), and the other is to multipoint sampling the waveform (waveform voltage during walking of 20 to 50 steps). Is sampled at 50 Hz) and the variance of the value at each point (the average of the square of the difference between each data and the average value) is calculated. The results are shown separately in FIGS. 8A is a diagram using the variance values of the acceleration waveforms on the X axis and the Y axis, and FIG. 8B is a diagram using the peak values of the acceleration waveforms on the X axis and the Y axis. FIG. 9A shows the X-axis acceleration and the Z-axis angular velocity, and FIG. 9B shows the Y-axis acceleration and the Z-axis angular velocity, all using the peak value of the detected waveform. FIG. 10A is a diagram using the variance values of the X-axis acceleration and the Z-axis angular velocity, and FIG.

Referring to each figure, first, in FIG. 8 (b) and FIGS. 9 (a) and 9 (b) in which peak values are combined, measurement points indicating various motions are hardened together and are considerably complicated. Therefore, there is a possibility that the movement cannot be reliably identified. On the other hand, in the example in which the variance values of the detected waveforms are combined, the separability of the motion is poor in FIG. 8A, which is the acceleration, but both figures in FIG. good. Among them, the vertical acceleration Gx and the vertical angular velocity Ωz in the front-rear plane were used (a).
The figure is considered to have slightly better discrimination.

From the above results, it is most suitable for the motion discrimination when it is general to use the vertical acceleration Gx and the vertical angular velocity Ωz in the vertical plane as the sensitive directions of the motion in the body-side device. It is also suitable for determination of rehabilitation as shown in FIG. 7 and can be realized by a body-side device having good wearability and usability as shown in FIG. 3 using a thin motion sensor having a detection direction as shown in FIG. Is shown.

The embodiments of the present invention are, of course, not limited to some of the embodiments described above. For example, the direction of the sensitivity of acceleration or angular velocity may select a different direction depending on the purpose of use of the device. Data transmitted / received between the body-side device and the external device may be any data as long as necessary exercise information is transmitted. The body-side device may have a function such as a clock or a mobile phone (the clock function may be used for timing control). Also, the mounting position of the body-side device is not necessarily limited to the wrist, but may be any position on the arm, for example. Also, the exercise measurement result is not always processed and displayed as shown in FIG.
Alternatively, the detected waveform of the acceleration or the angular velocity may be displayed as it is as shown in each of FIGS. In addition, there may be various cases in which the calculation processing of the measured value is performed in addition to the processing shown in the experiment, for example, obtaining an average of absolute values. It is also conceivable to measure acceleration or angular velocity in other directions and use it as auxiliary data to improve the accuracy of diagnosis or exercise evaluation.

The application of the present apparatus is not limited to the collection and evaluation of exercise data, but may be, for example, a communication tool. The user makes a request to the remote medical staff, such as "I want you to come immediately," and communicates several types of requests and intentions, as a signal of a pre-arranged body movement,
By analyzing the motion detection waveform on the external device side, the signal operation, that is, the intention can be known.

[0037]

The body movement sensing device of the present invention has the following features.
Since the acceleration in one direction and the rotational angular velocity in one direction are detected and a predetermined calculation is applied to them to judge or evaluate the motion, (1) a simple configuration and a body-side device using a minimum number of sensors and measurement circuits Has a basic effect that it can be made small, its power supply can have a margin, and it can be an easy-to-handle communication tool.

By adding the constituent features of claims 2 to 7 to the structure of claim 1, the following effects can be further added. (2) Since the operation determination result and the evaluation result can be read directly by the body-side device, there is an effect that the user can easily manage the self-health.

(3) Since the operation determination result and the evaluation result are displayed on the external device side by the data transmission from the body side device, the medical institution side observes and manages the state of a plurality of users (patients). Can be. In addition, there is an effect that a message from the user can be received and a corresponding treatment can be performed.

(4) By specifying the detection direction of the linear motion and the rotary motion of the body-side device with respect to the body, it is possible to obtain necessary and sufficient information according to the purpose with a small number of detection elements. In addition, since both particularly important walking and running movements and upper limb movements can be detected, for example, estimation of energy consumption and evaluation of rehabilitation can be performed.

(5) Since the widest surface of the body-side device, the widest surface of the thin motion sensor, and the detection rotation surface are substantially parallel to each other, there is an effect that a body-side device that is thin and has a small mounting burden can be realized. .

(6) Further, since the acceleration sensor is integrated with the angular velocity sensor and is superimposed on the display unit, there is an effect that the body-side device which is further reduced in size and in which the display is easy to see can be realized.

(7) By determining the variance of the acceleration output or the angular velocity output, there is an effect that the type of exercise can be more clearly identified.

(8) Further, by taking the logarithm of the exercise measurement value, the type of exercise can be more clearly identified.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 2 is a block diagram of a second embodiment of the present invention.

3A and 3B show an example of a body-side device according to an embodiment of the present invention, wherein FIG. 3A is a partial plan view, and FIG.

FIG. 4 is a plan view showing an internal structure of the motion sensor according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an experimental situation of a vibration response in body motion sensing.

FIGS. 6A and 6B are graphs showing the experimental results of the vibration response of each part of the body, where FIG. 6A shows the top of the head, FIG. 6B shows the breast pocket, FIG. 6C shows the waist belt, FIG. 6D shows the ankle, and FIG. Wrist with extended elbows,
(F) is a case of a wrist in which an elbow is bent and leveled.

FIGS. 7A and 7B are graphs showing measurement results of right hand and left hand movements in a finger-nose test, wherein FIGS.
(C) and (d) show the case of a healthy person B, (e) and (f) show the case of left upper limb paralysis.

8A and 8B are graphs showing experimental results obtained by performing various body exercises, performing arithmetic processing on motion data in each direction of the wrist, and combining the data, wherein FIG. 8A shows variance values of acceleration waveforms on the X axis and the Y axis,
(B) is a diagram using the peak values of the acceleration waveforms on the X axis and the Y axis.

FIGS. 9A and 9B are graphs showing experimental results obtained by performing various body exercises and calculating and combining exercise data in each direction of the wrist, where FIG. 9A is an X-axis acceleration and a Z-axis angular velocity, and FIG. It is a figure which took the axis acceleration and the Z-axis angular velocity, and all used the peak value of the detected waveform.

FIGS. 10A and 10B are graphs showing experimental results obtained by performing various physical exercises and calculating and combining exercise data in each direction of a wrist; FIG. 10A is an X-axis acceleration and a Z-axis angular velocity; FIG. FIG. 7 is a diagram using both variance values of axial acceleration and Z-axis angular velocity.

[Explanation of symbols]

 1, 3 Body side device 2 External device 4 Human body 5 Fixed base 6 Shaker 11 Acceleration sensor 12 Angular velocity sensor 13 Acceleration measuring circuit 14 Angular velocity measuring circuit 15 Acceleration computing circuit 16 Angular velocity computing circuit 17 Motion judging circuit 18 Display device 19 Storage device Reference Signs List 20 reproduction circuit 21 recording device 22, 23 communication circuit 24, 25, 26 control circuit 31 motion sensor 32 display device 33 communication module 34 battery 35 operation switch 36 arm band 40 sensor container 41 hermetic terminal pin 50 motion sensor vibrator 51 total Base 52 Fixed part A 53 Outer leg A 54 Middle leg B 55 Outer leg C 56 Tuning fork base 57 Support point 58A, 58B, 58C Leg added mass 60 Load mass 61 Bar A 62 Bar B 63 Support spring 64 Fixed part B G acceleration Z coordinate axis Ω angular velocity

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01P 9/04 A61B 5/10 310G 15/10 G01P 15/00 A (72) Inventor Norihiko Shiratori Kitasaku, Nagano Prefecture 1173 Kusukoshi, Miyota-machi, Gunchi 1394 Micro Stone Co., Ltd.

Claims (8)

[Claims] 1. A motion sensor capable of measuring an acceleration in one direction and a rotational angular velocity around one axis, and using the motion sensor to measure the acceleration in one direction and the rotational angular velocity around one axis for a predetermined period. Measuring circuit means for measuring,
A body-side device mounted on a predetermined part of the body, operation circuit means for performing predetermined calculations on the acceleration output and angular velocity output of the measurement circuit means, respectively, and the acceleration output and angular velocity output on which the predetermined calculation has been performed A determination circuit for determining the type and intensity of the physical exercise in the predetermined period by a combination of the above and a display for displaying the type and intensity of the determined physical exercise or the evaluation result thereof. Body movement sensing device. 2. The body-side device, wherein all of the motion sensor, the measurement circuit means, the arithmetic circuit means, the judgment circuit means, and the display means are mounted on a predetermined part of the body. The body movement sensing device according to claim 1, wherein 3. The motion sensor, the measurement circuit means, the arithmetic circuit means, the determination circuit means, and the display means, wherein at least the motion sensor and the measurement circuit means are in a predetermined part of a body. Embedded in a body-side device attached to the body, other means are incorporated in an external device that is not attached to the body, and the body-side device includes transmission means for intermediate data, and the external device is an intermediate device. 2. The apparatus according to claim 1, further comprising data receiving means.
Body movement sensing device. 4. The acceleration in one direction detected by the motion sensor is substantially vertical acceleration of the body, and the angular velocity in one direction detected by the motion sensor includes a substantially vertical direction and a front-back direction of the body. 4. The body motion sensing device according to claim 1, wherein the body motion sensing device is an angular velocity with respect to a rotational motion in a plane. 5. The body-side device is a device to be worn on an arm. Inside the body-side device, the angular velocity sensor section of the motion sensor is housed in a thin box-shaped container, and the widest surface of the body-side device is provided. The body motion according to any one of claims 1 to 4, wherein the rotation direction is substantially parallel to the widest surface of the box-shaped container. Sensing device. 6. The body-side device has a display device on a main surface, and an acceleration sensor unit and an angular velocity sensor unit having an integrated structure are housed in a box-shaped container of the motion sensor, The container of the motion sensor is disposed in the body-side device substantially parallel to the display device, and the acceleration detection direction of the motion sensor is a direction substantially parallel to the widest surface of the box-shaped container. The body movement sensing device according to claim 5, wherein: 7. The body motion sensing device according to claim 1, wherein the predetermined calculation is to obtain at least one of the variance of the acceleration output and the angular velocity output. 8. The body motion sensing apparatus according to claim 7, wherein the predetermined calculation is to obtain a variance of at least one of the acceleration output and the angular velocity output, and take a logarithm thereof.