TWI391880B - Wearable motion sensing device and method thereof - Google Patents

Description

Wearable activity sensing device and method thereof

The present invention provides a sensing activity device centered on a wearable activity sensing device, which can estimate and record the daily activity amount, and detect accidents such as falls, coma, and Appropriate warnings can be issued to remind users to increase the amount of activity, or to notify family members, relevant caregivers or medical institutions when an accident occurs.

Reconnaissance falls and activity are a very important part of the health maintenance of the elderly. According to relevant research, nearly one-third of seniors over 65 have at least one fall experience in one year, and about one-third Older people with falling experience have psychological fear of falling fear. Physical injury and psychological factors caused by falling will cause the activity to decrease. The decrease in activity will accelerate the aging process, and there will be problems of balance and gait. There is a decline in mental function, so it is necessary to create activities and fall detection systems, and provide reminders and alarms, so that the elderly can maintain a considerable amount of activity in health maintenance, so that medical personnel and caregivers can be accidentally Provide assistance in a timely manner when unfortunately occurs.

Acceleration sensors are known to be used to make fall detection and activity monitoring devices. For example, U.S. Patent Nos. 6,160,478, 6,433,690 B2, 7,093,531 B2, 2007/0030587 A1, 2007/0225947 A1, but in the prior art, existing system devices do not combine fall detection and activity monitoring functions, if desired At the same time, it is necessary to wear two systems or more to detect falls and record activities. Most of the existing systems are not equipped with daily routines. Common accessories (such as: US Patent Bulletin No. 7095331 B2, 2007/0030587 A1, 2007/0225947 A1), if you need to wear often increase the burden on the user, resulting in a decline in willingness to use, can not be used in a long-term and regular, lost the original In view of the intent of the invention, the present invention, in view of the deficiencies of the past system, proposes to match the portable acceleration sensor with daily necessities (watches and decorations), and simultaneously record activities and reconnaissance accidents, both functional and practical. Sex.

The present invention provides a faint detection by using the regional time function of the wristwatch in combination with the recording activity and the reconnaissance accident, such as: US Patent Publication No. 6160478, 6433690 B2, 7093531 B2, 2007/0030587 A1. 2007/0225947 A1) Considering the unusually large activities of the wearer, such as: falling, but not the abnormal activity, such as: fainting, for consideration, usually the instantaneous maximum acceleration or body angle change can be used Interpreting a fall event, and a long-term activity quiescent state during non-sleeping time may cause a fainting event for the user. An elderly person living alone or a solitude patient is most likely to lose help because of a fainting event. Ability, missed the critical time of first aid, and even lost life, so the existing system can not be released when the user is in a coma situation to improve the alarm, the present invention considers the coma state is very likely to appear too long in non-sleep time The body and limb activity are still, so combined with the regional timekeeping function and acceleration sensing to stop the abnormal activity for non-sleep time Conditions issued a warning, the first increase in activity prompted the wearer, if the user does not respond timely, relevant personnel will inform the wearer site visits to confirm whether the wearer is in an unexpected coma.

Therefore, in view of the shortcomings of the above-mentioned conventional structures, how to develop an innovative structure that is more ideal and practical, the consumers are eagerly awaiting, and the relevant industry must strive to develop the goal and direction of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

In the prior art acceleration measurement recording system technology (for example, US Patent Publication No. 6160478, 6433690 B2, 7095531 B2, 2007/0030587 A1, 2007/0225947 A1), it has not been applied to the system device for home care. At the same time, it also has regional time counting, fall detection and activity monitoring functions, and many of them are not combined with daily accessories (such as: US Patent Publication No. 7095531 B2, 2007/0030587 A1, 2007/0225947 A1), if necessary, additional extra The burden on the user, in addition, the situation of fainting is not taken into account, and there are not perfect improvements in care.

The invention provides a watch-type activity sensing system centered on the system, which can be implemented as a wristwatch. In addition to the general timing and display functions, the watch has built-in reconnaissance, recording and wireless transmission units, and its reconnaissance The unit has at least one wrist triaxial acceleration sensor, the storage unit of the recording unit uses a flash memory device, and the micro controller analyzes the communication between the information and the coordination component, and the wireless transmission chip is responsible for data transmission, and the wearing The system is equipped with more than one wireless sensing component for the user (patient or senior) body The wireless sensing component can be packaged into general accessories such as badges, buttons, jewelry, etc., and the sensing component includes at least one sensing end triaxial acceleration sensor, a micro controller, and a sensing end. The wireless module can measure the body activity and transmit data to the watch. The acceleration data of the body and the wrist can be used to estimate the daily activity, to record and track the long-term or regular activity, and to detect accidents such as accidents. : falls, coma, and can properly issue a warning to remind users to increase the amount of activity. In the event of an accident, the watch can also notify the family, relevant caregivers or medical institutions to prevent delays in medical treatment. Flash memory activity records can also be retrieved for users to self-assess or provide medical staff with a reference for clinical evaluation.

The invention combines regional time counting, fall detection and activity monitoring functions, can be used as a general watch, can also record daily activity amount, display cumulative activity report, detect fall event and detect suspected coma event according to regional time, and has The function of issuing a warning can prompt the user to increase the activity and contact the relevant personnel. When the accident happens, the elderly or the patient will not lose the chance to get rescued in the first time because they are in a solitude state. The regret caused by delay in medical treatment.

The above-mentioned objects, structures and features of the present invention will be described in detail with reference to the preferred embodiments of the present invention. .

The present invention provides a wearing activity sensing device and method thereof, which combines regional time counting, fall detection and activity monitoring functions, first to fifth The figure is a system appearance view of the wearing device of the present invention implemented as a wristwatch and a decoration, which comprises: at least one sensing component (2), which can be worn on any part of the body , a cover (3) and a start switch (4); a watch (1), the watch (1) is provided with a display interface (5) capable of displaying characters and drawings, the display interface (5) for LCD or OLED, the watch body has at least one control button (6) and a sound source output (7), and a sensor (10) is disposed on the watch body or the strap (8), the sensor (10) may be a temperature or optical sensor for detecting whether the user has worn the wristwatch (1), a buckle (9), and the sensor may also be disposed on the buckle (9) (10), according to whether the buckle (9) is buckled to determine whether the user has worn the watch (1), so when the user does not wear the watch (1), the activity record and fall The detection function can be suspended to reduce energy consumption and misjudgment opportunities. In addition, there is a mini USB (Universal Serial Bus) interface (13) for charging, and the rechargeable battery of the power supply (26) can be removed through the mini USB. Interface (13) and computer or charging The power connection is used for battery charging, and the wristwatch wireless module (25) and the sensing terminal wireless module (35) are respectively built in the wristwatch (1) and the sensing component (2), so that the sensing component (2) will be The collected data is transmitted wirelessly (12) to the watch (1) for storage or analysis.

In the wristwatch (1), the basic circuit component configuration is as shown in the second figure, at least one circuit board (21) has a circuit component configuration centered on a microcontroller (22), and the microcontroller (22) receives The signal from the control button (6), the body or the strap and the sensor (10) on the buckle, the three-axis acceleration sensor (23) of the watch, and the wireless module of the watch (25), and the micro The output object of the controller (22) is obvious The interface (5), the audio source output (7) and the storage device (24), the storage device (24) can be a flash memory, an SD card, wherein the components connected to the micro controller (22) function as follows: The control button (6) can provide a user input operation command, can set the time, alarm or cancel the system misjudgment alarm; the sensor (10) on the body, buckle or strap can read and provide signals to determine Whether the watch (1) is worn by the user, if worn, will accumulate the watch's three-axis accelerometer (23) signal as the activity estimate and perform the coma and fall detection, the watch wireless mode The group (25) mainly receives the acceleration signal from the sensing component (2), that is, the acceleration signal of the body part, and the information of the body posture change can be known from the body acceleration as the basis of the user activity and the fall reconnaissance; The function of the interface (5) is to display the time of the area and the related activity amount, such as: insufficient activity, regular accumulation of activity; sound source output (7) is to detect the suspected fall or coma, will issue a warning and help voice, and alert And help message can also be wireless through the watch The group (25) is transmitted; the storage device (24) records all the activity data, the detected events and the misjudgment records. In addition, the watch (1) system has the energy unit established, the energy of the watch (1) From a power source (26), the power source (26) can be a rechargeable battery and can be charged via a mini USB interface (13) via a built-in charging IC.

In the sensing element (2) system, the basic circuit component configuration is as shown in the third figure, similar to the wristwatch (1) system having a circuit board (31) centered on a microcontroller (32), the microcontroller (32) ) receiving signals from the start switch (4), the sense side triaxial acceleration sensor (33), and the sense side wireless module (35), the user can turn the sensing on or off by pressing the start switch (4) Component (2) system, If it is in the on state, the sensing component (2) system will obtain the acceleration signal of the wearing position from the sensing end triaxial acceleration sensor (33), and the three-axis acceleration sensor from the sensing end (33) The obtained acceleration signal is the main output of the sensing component (2) system, which is communicated by the sensing terminal wireless module (35) and the wristwatch (1), and the energy of the sensing component (2) system can come from A sensing end power supply (36), which can be a rechargeable battery, is charged via a mini USB interface (34) via a charging IC on its circuit board (31).

The acceleration signals obtained by the three-axis accelerometer (23) of the watch and the three-axis accelerometer (33) of the sensing end are the wrist acceleration (42) and the body acceleration (41), respectively. In the fourth figure, the prerequisite for starting the reconnaissance process (figure 4) is that the regional time is not the preset sleep time, the signal of the receiving sensor (2) system is received, and the sensor of the body and the strap is used ( 10) or the buckle (9) knows that the watch (1) is in the wearing condition, and the part of the wrist acceleration (42) is mainly used for its magnitude. The formula is as follows: Among them, a _x , a _y , a _z are the accelerations of three mutually perpendicular directions collected by the three-axis acceleration sensor (23) of the watch.

The part of the body acceleration requires information on the magnitude and direction, because when the fall occurs, the body acceleration (41) will produce a large amount of value change (figure 5), and the body posture after the fall will be or approximate the inverted posture. The reconnaissance posture needs to be judged by the direction of the body acceleration (41), so the present invention uses the custom parameter | AC | to take the magnitude and direction of the acceleration to perform the fall detection, | AC | According to the observation of the five figures, it is impossible to know from the AM that the posture of the body changes (the standing position and the inverted posture are all values 1), and the value related to the posture change needs to be changed by | AC |, and the value is changed when the body falls. 1, different from standing, its value will be equal to 0, | AC | The formula is as follows: | AC |=| a × b |=| a || b |sin θ , where a is the current body acceleration vector (by The sensing element (2) is instantaneously measured; b is the body acceleration vector when standing (measured in the standing or straight sitting posture after the sensing element (2) is worn); θ is the angle between a and b.

After parameterization, the process of fall reconnaissance can follow the discriminant rule of the fourth figure. If the magnitude of the body acceleration (41) is higher than the fall threshold (43), the posture reconnaissance will be initiated 2 seconds after the detection of the threshold event. (44) If it is confirmed to be in the lying position (45), an alarm (46) will be issued. The alarm (46) is issued by the watch (1) system, and the sound source output (7) can send a distress sound and simultaneously wirelessly by the watch. The module (25) notifies the relevant care unit and personnel. If the alarm (46) is a false positive, the user can also cancel the wrong alarm by pressing the cancel button (47) (48).

The reconnaissance process suspected of being in a coma state can be seen in the fourth picture. The wrist acceleration (42) and the body acceleration (41) are simultaneously coordinated to detect, and the activity characteristics of the two different parts are set for the wrist and the body respectively. Activity thresholds (49 and 50), if wrist acceleration (42) and body acceleration (41) are lower than the wrist and body activity thresholds (49 and 50) for less than 45 minutes of low activity (51) (or For any specific preset time, the embodiment and the drawing of the present invention are exemplified by 45 minutes, but not limited to 45 minutes, and the user has time to wear the watch (1) and the time zone at that time is If the user does not have a preset sleep time, the user will be given a low activity alarm (52). If the user has an action (53), such as: moving the limb or body as a response, the alarm is cancelled (48), if the alarm ( 46) For misjudgment, users can The wrong alarm (47) is cancelled by pressing the cancel button (47).

The present invention is provided with a device and mechanism for storing (54) (fourth figure), and both the wrist acceleration (42) and the body acceleration (41) are recorded in accordance with the regional time, and the user's activity daily accumulation amount and weekly accumulation amount. The monthly cumulative amount, the annual cumulative amount, etc. can be known through the display interface (5), and the storage (54) device installed in the wristwatch (1) is a flash memory, which is based on the consideration of portability and size. The micro-SD card is the recommended device. The memory card can be taken out and transmitted to a personal or hospital computer (56), which is convenient for users and related health care providers to track the user's activities for a long time to make appropriate exercise plans. Adjustment, and when the accumulated activity is lower than a certain level, the watch (1) system can also be set. On the display interface (5), a warning sign is displayed to remind, and in addition, the user presses the cancel button for the occurrence of a misjudgment (47) In case of mis-judgment, the misjudgment record will also be recorded in the flash memory. The misjudgment record will contain the regional time and the current acceleration to facilitate the development and maintenance personnel of the present invention to continue to improve the system.

The present invention has been described with reference to the preferred embodiments of the present invention. However, those skilled in the art can change and modify the present invention without departing from the spirit and scope of the invention. Such changes and modifications shall be covered in the scope defined by the following patent application.

(1)‧‧‧ watches

(2) ‧‧‧Sensor components

(3) ‧ ‧ decorations

(4) ‧‧‧Start switch

(5)‧‧‧Display interface

(6)‧‧‧Control buttons

(7) ‧‧‧ source output

(8)‧‧‧Body or strap

(9) ‧‧‧ buckle

(10)‧‧‧ Sensors

(12)‧‧‧Wireless mode

(13)‧‧‧mini USB interface

(21)‧‧‧ boards

(22)‧‧‧Microcontroller

(23)‧‧‧Watch triaxial acceleration sensor

(24)‧‧‧Storage devices

(25)‧‧‧Watch wireless module

(26)‧‧‧Power supply

(31)‧‧‧Circuit board

(32)‧‧‧Microcontroller

(33)‧‧‧Sensing end triaxial acceleration sensor

(34)‧‧‧mini USB interface

(35)‧‧‧Sensor wireless module

(36)‧‧‧Sensor power supply

(41) ‧ ‧ body acceleration

(42) ‧ ‧ wrist acceleration

(43) ‧‧‧ fall threshold

(44) ‧‧‧ pose reconnaissance

(45) ‧ ‧ lying posture

(46) ‧‧‧Alarm

(47)‧‧‧Cancel button

(48) ‧ ‧ Cancelled

(49) ‧ ‧ body activity threshold

(50) ‧ ‧ wrist activity threshold

(51) ‧ ‧ 45 minutes of low activity

(52) ‧‧‧ activity low alarm

(53) ‧ ‧ action

(54)‧‧‧Storage

(56) ‧ ‧ personal or hospital computers

The first figure is a schematic view of the appearance of the present invention.

The second figure is a schematic circuit diagram of the wristwatch system of the present invention.

The third figure is a schematic circuit diagram of the sensing element system of the present invention.

Figure 4: Flow chart of the fall and activity reconnaissance of the present invention.

The fifth picture is a schematic diagram of the relationship between acceleration parameters and fall events and posture transformation.

(5)‧‧‧Display interface

(41) ‧ ‧ body acceleration

(42) ‧ ‧ wrist acceleration

(43) ‧‧‧ fall threshold

(44) ‧‧‧ pose reconnaissance

(45) ‧ ‧ lying posture

(46) ‧‧‧Alarm

(47)‧‧‧Cancel button

(48) ‧ ‧ Cancelled

(49) ‧ ‧ body activity threshold

(50) ‧ ‧ wrist activity threshold

(51) ‧ ‧ 45 minutes of low activity

(52) ‧‧‧ activity low alarm

(53) ‧ ‧ action

(54)‧‧‧Storage

(56) ‧ ‧ personal or hospital computers

Claims (10)

A wearable motion sensing device includes: a wristwatch having a watch body and a strap connected to the two ends of the watch body and having a buckle, at least one sensor Mounted on the watch body or the watchband, the sensor is used to detect the wearing condition of the watch, a circuit board, the circuit board is embedded in the watch body, and the circuit board includes a watch three-axis acceleration sensor, A wireless module, a storage device, a display interface, a control button, a sound source output, and a power source are all connected by a microcontroller, and the sensor is also coupled to the microcontroller. The control button provides a user input operation command, which can set a time, alarm or cancel the system's false alarm; the sensor or the sensor on the strap can read and provide a signal to determine whether the watch has been If the user wears it, the three-axis accelerometer signal of the watch will be accumulated as the activity estimation and the coma and fall detection will be performed; the output of the sound source can detect the suspected fall or coma. Alert and ask for help, while warning and The rescue message can also be transmitted through the wireless module of the watch; the storage device will record all the activity data, the detected event and the misjudgment record; the function of the display interface is to display the time of the area and the information about the activity amount; The power source can provide the energy required by the wristwatch; and at least one sensing component, the sensing component surface is provided with a start switch and a decoration for decoration, a circuit board, the circuit board is embedded in the sensing In the component, the circuit board includes a three-axis acceleration sensor, a sensing wireless module and a sensing terminal power supply are connected by a micro controller, and the micro controller is also Connecting the start switch, the sensing component detects the acceleration signal of the body part and transmits it to the wireless module of the watch; and the wristwatch cooperates with the sensing component to sense the magnitude and direction of the acceleration, thereby determining that If a fall or coma occurs, a solicitation sound or alarm is immediately outputted from the source, and the watch wireless module notifies the relevant care unit and personnel. The wearable activity sensing device of claim 1, wherein the sensor of the watch can be a temperature or optical sensor. The wearable activity sensing device of claim 1, wherein the circuit board of the wristwatch further comprises a miniUSB interface. The wearable activity sensing device of claim 1, wherein the circuit board of the sensing component further comprises a miniUSB interface. The wearable activity sensing device of claim 1, wherein the power source of the watch is a USB-connectable charging IC or a rechargeable battery. The wearable activity sensing device of claim 1, wherein the sensing end of the sensing component is a USB capable charging IC or a rechargeable battery. A wearing activity sensing method comprises: first obtaining a three-axis acceleration signal when the body is standing still as a reference vector b; obtaining an immediate body triaxial acceleration vector a; taking | AC |=| a × b | =| a || b |sin θ ;θ is the angle between a and b; the calculated parameter, | AC |; fall reconnaissance according to the parameter | AC |; threshold detection: by parameter | AC | find out the threshold range The acceleration time of the body is the suspected fall time; posture recognition: at least one second after the suspected fall time, according to the parameter | AC | to determine whether the user is in a reverse posture, and if so, it is determined to fall and issue a fall alarm. The wearable activity sensing method of claim 7, wherein the fall alarm is a help voice or a wireless help signal. A wearable activity sensing method includes: a reconnaissance area time is a non-preset sleep time; obtaining a three-axis acceleration signal of a wrist and a body; parameterizing a three-axis acceleration signal; and performing a triaxial acceleration signal parameter quantity Suspected faint reconnaissance; its suspected faint reconnaissance can be divided into: Threshold detection: find out the occurrence time of the three-axis acceleration signal parameter value continuously below the threshold range for a specific time, that is, the suspected fainting time; the preliminary warning is issued: A low activity reminder for a person who is suspected of fainting; activity identification: after a person receives a low activity reminder, if his or her person has an active wrist or body, it is not judged to be faint. If not, it is considered to be fainting. And issued a faint alarm. Wearable activity sensing as described in claim 9 The method wherein the faint alarm is a distressed voice or a wireless distress signal.