TW201926272A - Systems and methods for fall detection using radar, and related computer program products - Google Patents

Abstract

Systems and methods for fall detection using radar are provided. First, radar transmission signals are transmitted in a specific space by using a radio wave transmitter including at least one antenna, and radar reflected signals are received in the specific space by using a radio wave receiver including at least one antenna. A Doppler analysis is performed according to the radar transmission signals and the radar reflected signals, to identify a subject in the specific space, and determine a shortest distance between the subject and an electronic device and an area corresponding to the subject. It is determined whether the presence of a fall on the subject according to the shortest distance between the subject and the electronic device and the area corresponding to the subject.

Description

Using radar fall detection system and method, and related computer programs Product

The present invention relates to a fall detection system and method, and more particularly to a fall detection system and method that can be implemented using radar technology.

With the advent of an aging population, home care for the elderly has become one of the social issues that every country values. For the elderly, factors that degenerate due to physical function often make their movements less comfortable than young people. For this reason, falls have also become one of the most common and serious injuries in the elderly.

In general, the frequency of falls in the elderly and the severity of injuries caused by falls are relatively high with age. When it falls, it usually causes fractures, head trauma, and even death. As the ratio of elderly people living alone in the community is getting higher and higher, because there are no other cohabitants who can provide relevant assistance, the degree of injury after the fall of the elderly is usually relatively serious.

Conventionally, U.S. Patent No. 7,567,200 B1 discloses a technique for monitoring the position of a body using a radar and detecting a fall. In this patent, the radar can be used to detect the distance between the specific part of the human body from the ground and the antenna, and the vertical motion of this part to determine whether a fall has occurred. In this technique, since the fall determination is performed only on the basis of the distance, it is often misjudged because of the specific behavior of the user, such as a squat.

In view of this, the present invention provides a fall detection system and method using a radar, wherein the radar technology can determine individuals in the space, and determine whether the individual falls according to the distance of the corresponding individual detected by the radar and the area of the individual.

A fall detection system using a radar according to an embodiment of the present invention includes a radio wave transmitter having at least one antenna, a radio wave receiver having at least one antenna, and A controller. The radio wave transmitter transmits a complex radar transmission signal in a specific space. The radio wave receiver receives complex radar reflected signals in a particular space. The controller performs a Doppler analysis based on the radar transmission signal and the radar reflection signal, thereby knowing one individual in a specific space, and determining the shortest distance from the individual to the electronic device and the area of the individual. The controller determines whether the individual has a fall state based on the shortest distance between the individual and the electronic device and the area of the individual.

A fall detection method using a radar according to an embodiment of the present invention. First, a complex radar transmission signal is transmitted in a specific space by a radio wave transmitter having at least one antenna, and a plurality of radar reflection signals in a specific space are received by a radio wave receiver having at least one antenna. A Doppler analysis is performed according to the radar transmission signal and the radar reflection signal, thereby knowing one individual in a specific space, and determining the shortest distance from the individual to the electronic device and the area of the individual. Whether the individual has a fall state is determined according to the shortest distance between the individual and the electronic device and the area of the individual.

In some embodiments, it can be determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time, and whether the area of the individual is increased by a predetermined area within a predetermined time. When the shortest distance increases the predetermined distance within a predetermined time and the area increases the predetermined area within a predetermined time, the individual is judged to have a fall state. In some embodiments, when the shortest distance is increased by a predetermined distance for a predetermined time and the area is increased by a predetermined area for a predetermined time, it can be determined whether the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period. When the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period, the individual is judged to have a fall state.

In some embodiments, the specific area includes a setting area, and the radar transmission signal and the radar reflection signal may be used to determine whether the individual enters or leaves the setting area, thereby recording one of the corresponding individuals.

In some embodiments, when the individual has a fall state, a rhythm moving portion may be determined by the individual, and one of the rhythm moving portions is detected to be in a moving state. In some embodiments, the rhythm moving portion includes a lung, a heart, or a chest.

In some embodiments, when an individual has a fall state, a fall notification can be sent over a wireless network, wherein the fall notification includes a moving state of the rhythm moving portion.

In some embodiments, when the individual has a fall state, a countdown operation can be performed and a fall notification is sent over the wireless network after the countdown operation ends. In a In some embodiments, when an individual has a fall state, a specific device can be used to display a countdown operation through a user interface, and it is determined whether an interrupt indication is received before the countdown operation ends. When an interrupt indication is received before the end of the countdown operation, the transmission of the corresponding fall notification is canceled.

The above method of the present invention can exist in a coded manner. When the code is loaded and executed by the machine, the machine becomes the means for practicing the invention.

The above described objects, features, and advantages of the invention will be apparent from the description and appended claims appended claims

100‧‧‧Using the radar fall detection system

110‧‧‧Electronic devices

112‧‧‧Radio wave transmitter

112a‧‧‧Antenna

114‧‧‧Radio wave receiver

114a‧‧‧Antenna

116‧‧‧ Controller

118‧‧‧Wireless network connection unit

U‧‧‧ individual

SS‧‧‧Special space

S402, S404, ..., S410‧‧‧ steps

A1, a2‧‧‧ individual area

D1, d2‧‧‧ the shortest distance of the individual

S602, S604, S606‧‧‧ steps

S802, S804, S806, S808‧‧‧ steps

S902, S904, S906, S908‧‧‧ steps

S1002, S1004, S1006, S1008‧‧‧ steps

S1102, S1104, ..., S1112‧‧ steps

S1202, S1204, ..., S1214‧‧ steps

SA‧‧‧Setting area

S1502, S1504, ..., S1510‧‧‧ steps

1 is a schematic diagram showing a fall detection system using a radar according to an embodiment of the present invention.

2 is a schematic diagram showing a fall detection system using a radar according to another embodiment of the present invention.

Figure 3 is a schematic diagram showing an example of using a radar to detect a fall in a particular space in accordance with an embodiment of the present invention.

Fig. 4 is a flow chart showing a fall detection method using a radar according to an embodiment of the present invention.

Figure 5 is a schematic diagram showing an example of a radar chart in accordance with an embodiment of the present invention.

Figure 6 is a flow chart showing a method for determining a fall state of an individual in accordance with an embodiment of the present invention.

Figure 7 is a schematic diagram showing another example of a radar chart in accordance with an embodiment of the present invention.

Figure 8 is a flow chart showing a method for determining a fall state of an individual in accordance with another embodiment of the present invention.

Figure 9 is a flow chart showing a method for determining a fall state of an individual in accordance with another embodiment of the present invention.

Figure 10 is a flow chart showing the determination of an individual to fall in accordance with another embodiment of the present invention. The method of reverse collision.

Figure 11 is a flow chart showing a method for determining a fall state of an individual in accordance with another embodiment of the present invention.

Figure 12 is a flow chart showing a method for determining a fall state of an individual in accordance with another embodiment of the present invention.

Figure 13 is a schematic view showing a top view of a particular space in accordance with an embodiment of the present invention.

Figure 14 is a schematic diagram showing an example of a radar chart having a set region in accordance with an embodiment of the present invention.

Figure 15 is a flow chart showing a fall detection method using a radar according to another embodiment of the present invention.

Figure 1 shows a fall detection system utilizing a radar in accordance with an embodiment of the present invention. The fall detection system 100 using radar according to an embodiment of the present invention includes at least one electronic device 110. The electronic device 110 includes a radio wave transmitter 112, a radio wave receiver 114, and a controller 116. The radio wave transmitter 112 may include at least one antenna 112a for transmitting a radar transmission signal for a specific space. It should be noted that in some embodiments, the radio wave transmitter 112 may further include a steerable antenna (not shown in FIG. 1). The steerable antenna can be adjusted to the angle at which it sends the radar to transmit signals. The radio wave receiver 114 may include at least one antenna 114a for receiving radar reflection signals from a specific space. Similarly, in some embodiments, radio wave receiver 114 may further include a steerable antenna (not shown in FIG. 1). The steerable antenna can be adjusted to the angle at which it receives the reflected signal from the radar. It should be noted that in some embodiments, the radar technology employed in the present invention may be an ultrasonic radar, a microwave radar, or a laser radar. In some embodiments, the frequency of the radio waves may be in the microwave 24 GHz or millimeter wave 77 GHz band. It should be noted that the frequency of the radio wave, the radar transmission and reception technology, and the angle of the antenna setting can be adjusted according to different needs and applications, and the present invention is not limited to any specific technology. The controller 116 can control the operation of related software and hardware in the electronic device 110, the details of which will be described later.

Fig. 2 shows a fall detection system using a radar according to another embodiment of the present invention. The fall detection system 100 using radar according to an embodiment of the present invention includes at least one electronic device 110. The electronic device 110 includes a radio wave transmitter 112, a radio wave receiver 114, a wireless network connection unit 118, and a controller 116. The radio wave transmitter 112 may include at least one antenna 112a for transmitting a radar transmission signal for a specific space. Similarly, in some embodiments, the radio wave transmitter 112 can further include a steerable antenna (not shown in FIG. 2). The steerable antenna can be adjusted to the angle at which it sends the radar to transmit signals. The radio wave receiver 114 may include at least one antenna 114a for receiving radar reflection signals from a specific space. Similarly, in some embodiments, radio wave receiver 114 may further include a steerable antenna (not shown in FIG. 2). The steerable antenna can be adjusted to the angle at which it receives the reflected signal from the radar. Similarly, in some embodiments, the radar technology employed in the present invention may be an ultrasonic radar, a microwave radar, or a laser radar. In some embodiments, the frequency of the radio waves may be in the microwave 24 GHz or millimeter wave 77 GHz band. It should be noted that the frequency of the radio wave, the radar transmission and reception technology, and the angle of the antenna setting can be adjusted according to different needs and applications, and the present invention is not limited to any specific technology. The wireless network connection unit 118 can have a network access capability for coupling to other electronic devices having network access capabilities through a wireless network, such as a Bluetooth network or a Wi-Fi network. It should be noted that in some embodiments, the wireless network connection unit 118 may be a low energy consuming technology, such as a network connection unit of Bluetooth Smart technology. There are two modes in Bluetooth Smart technology, such as peripheral mode and central mode. Wherein, in the central mode, the network connection unit can receive data from the network connection unit of other electronic devices and has the ability to actively connect to other electronic devices. In the peripheral mode, the network connection unit can broadcast signals, such as their own identification data. However, in peripheral mode, the network connection unit cannot actively connect to other electronic devices. In some embodiments, the wireless network connection unit 118 is in a peripheral mode. In other words, the wireless network connection unit 118 has the data broadcasting capability, and the wireless network connection unit 118 can only be passively connected by other electronic devices, and cannot be actively connected to other electronic devices. The controller 116 can control the operation of related software and hardware in the electronic device 110, the details of which will be described later.

Figure 3 is a diagram showing an example of using a radar to detect a fall in a particular space in accordance with an embodiment of the present invention. In this example, the electronic device 110 can be disposed at a position in the center of the ceiling in a specific space SS. It should be noted that in some embodiments, the electronic device 110 It can be integrated with a light bulb to become a device with illumination and radar detection. The electronic device 110 can detect a user U in the specific space SS by using the radar technology, and determine whether the user U has a fall state according to the data detected by the radar.

Fig. 4 shows a fall detection method using a radar according to an embodiment of the present invention. The fall detection method using the radar according to the embodiment of the present invention is applicable to the electronic device as shown in FIG.

First, in step S402, a complex radar transmission signal is transmitted in a specific space by using a radio wave transmitter having at least one antenna. In step S404, a plurality of radar reflected signals in a specific space are received by a radio wave receiver having at least one antenna. It should be noted that in some embodiments, the radio wave transmitter and the radio wave receiver may each include a steerable antenna. The steerable antenna can be adjusted to the angle at which it transmits/receives the radar signal. It should be noted that in some embodiments, the radar technology employed in the present invention may be an ultrasonic radar, a microwave radar, or a laser radar. In some embodiments, the frequency of the radio waves may be in the microwave 24 GHz or millimeter wave 77 GHz band. It should be noted that the frequency of the radio wave, the radar transmission and reception technology, and the angle of the antenna setting can be adjusted according to different needs and applications, and the present invention is not limited to any specific technology. In step S406, a Doppler analysis is performed according to the transmitted radar signal and the received radar reflected signal to learn one of the specific spaces, and the individual to the electronic device is determined according to step S408 (radio wave transmitter/wireless) One of the shortest distances of the radio wave receiver and one of the individual areas. It is worth noting that in some embodiments, the area of the individual may be the area that the individual presents in the radar map. Figure 5 shows an example of a radar chart in accordance with an embodiment of the present invention. As shown in the figure, an individual U can be determined from the specific space SS by the radar signal, and the distance d1 between the individual U and the electronic device 110 and the area a1 of the corresponding individual U can be obtained. Then, in step S410, it is determined whether the individual has a fall state based on the shortest distance between the individual and the electronic device and the area of the individual.

Figure 6 is a diagram showing a method of determining an individual's fall state in accordance with an embodiment of the present invention. In step S602, it is determined whether the shortest distance between the individual and the electronic device is at a predetermined time, such as increasing a predetermined distance within one second. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S602), the determination in step S602 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S602), in step S604, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the face of the individual When the product does not increase the predetermined area within a predetermined time (NO in step S604), the flow returns to step S602. When the area of the individual is increased by the predetermined area within a predetermined time (YES in step S604), in step S606, it is determined that the individual has a fall state. Figure 7 shows an example of another radar chart in accordance with an embodiment of the present invention. As shown, when the distance between the individual U and the electronic device 110 in the specific space SS is increased from d1 to d2 within a predetermined time, the area of the corresponding individual U is increased from a1 to a2, and d2-d1>the predetermined distance and a2- A1> When the area is set, it means that the individual U has a fall state.

Figure 8 is a diagram showing a method of determining a fall state of an individual in accordance with an embodiment of the present invention. In step S802, it is determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S802), the determination in step S802 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S802), in step S804, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the area of the individual does not increase the predetermined area within a predetermined time (NO in step S804), the flow returns to step S802. When the area of the individual increases the predetermined area within a predetermined time (Yes in step S804), as in step S806, it is determined whether the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period, such as 30 seconds. When the shortest distance and area after the increase of the individual are not substantially maintained for a predetermined period (NO in step S806), the flow returns to step S802. When the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period (YES in step S806), as in step S808, it is determined that the individual has a fall state.

Figure 9 is a diagram showing a method of determining a fall state of an individual in accordance with another embodiment of the present invention. In step S902, it is determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S902), the determination in step S902 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S902), in step S904, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the area of the individual does not increase the predetermined area within a predetermined time (NO in step S904), the flow returns to step S902. When the area of the individual is increased by the predetermined area within a predetermined time (YES in step S904), as in step S906, it is determined that the individual has a fall state. Next, in step S908, a rhythm moving part is determined from the individual, and one of the rhythm moving parts is detected to be in a moving state. It is worth noting that in some embodiments, the rhythm moving portion includes a lung, a heart, and/or a chest. Similarly, in some embodiments, when the shortest distance is increased within a predetermined time, the predetermined distance is increased and the area is increased within a predetermined time. In the area, it can be judged whether the shortest distance and area after the increase of the individual are substantially maintained for a predetermined period. When the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period, the individual is judged to have a fall state.

Figure 10 is a diagram showing a method of determining a fall state of an individual in accordance with another embodiment of the present invention. In step S1002, it is determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S1002), the determination in step S1002 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S1002), in step S1004, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the area of the individual does not increase the predetermined area within a predetermined time (NO in step S1004), the flow returns to step S1002. When the area of the individual is increased by a predetermined area within a predetermined time (YES in step S1004), in step S1006, it is determined that the individual has a fall state. Then, in step S1008, a fall notification is sent through a wireless network by using a wireless network connection unit. As mentioned above, the wireless network connection unit can have a network access capability for accessing other electronic devices having network access capabilities through a wireless network such as a Bluetooth network or a Wi-Fi network. Coupling. It should be noted that in some embodiments, the wireless network connection unit may be a low energy consuming technology, such as a network connection unit of Bluetooth Smart technology. There are two modes in Bluetooth Smart technology, such as peripheral mode and central mode. Wherein, in the central mode, the network connection unit can receive data from the network connection unit of other electronic devices and has the ability to actively connect to other electronic devices. In the peripheral mode, the network connection unit can broadcast signals, such as their own identification data. However, in peripheral mode, the network connection unit cannot actively connect to other electronic devices. In some embodiments, the wireless network connection unit is in a peripheral mode. In other words, the wireless network connection unit has the data broadcasting capability, and the wireless network connection unit can only be passively connected by other electronic devices, and cannot actively connect to other electronic devices. It is worth noting that in some embodiments, the fall notification can be transmitted to a network server over a wireless network. In some embodiments, the fall notification may be transmitted over a wireless network to a particular trusted end, such as an individual's family or caregiver. It must be reminded that the delivery of the aforementioned fall notification is only an example of the present case, and the present invention is not limited thereto.

Similarly, in some embodiments, when the shortest distance is increased by a predetermined distance for a predetermined time and the area is increased by a predetermined area for a predetermined time, it can be determined whether the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period. The shortest distance after an individual increases When the area is substantially maintained for a predetermined period, the individual is judged to have a fall state. In some embodiments, when it is determined that the individual has a fall collision state, a rhythm moving portion may be determined by the individual, and one of the rhythm moving portions is detected to be in a moving state. It is worth noting that in some embodiments, the rhythm moving portion includes a lung, a heart, and/or a chest. In some embodiments, the aforementioned fall notification may include a movement state of the individual's rhythm moving portion.

Figure 11 is a diagram showing a method of determining a fall state of an individual in accordance with another embodiment of the present invention. In step S1102, it is determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S1102), the determination in step S1102 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S1102), in step S1104, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the area of the individual does not increase the predetermined area within a predetermined time (NO in step S1104), the flow returns to step S1102. When the area of the individual is increased by a predetermined area within a predetermined time (YES in step S1104), as in step S1106, it is determined that the individual has a fall state. Next, in step S1108, a countdown operation is performed. For example, a countdown job can start counting from a predetermined number of seconds, such as 30 seconds. In step S1110, it is judged whether or not the countdown job is ended. When the countdown operation has not ended (NO in step S1110), the determination in step S1110 is continued. When the countdown operation ends (YES in step S1110), in step S1112, a fall notification is transmitted through a wireless network using a wireless network connection unit. As mentioned above, the wireless network connection unit can have a network access capability for accessing other electronic devices having network access capabilities through a wireless network such as a Bluetooth network or a Wi-Fi network. Coupling. It should be noted that in some embodiments, the wireless network connection unit may be a low energy consuming technology, such as a network connection unit of Bluetooth Smart technology. There are two modes in Bluetooth Smart technology, such as peripheral mode and central mode. Wherein, in the central mode, the network connection unit can receive data from the network connection unit of other electronic devices and has the ability to actively connect to other electronic devices. In the peripheral mode, the network connection unit can broadcast signals, such as their own identification data. However, in peripheral mode, the network connection unit cannot actively connect to other electronic devices. In some embodiments, the wireless network connection unit is in a peripheral mode. In other words, the wireless network connection unit has the data broadcasting capability, and the wireless network connection unit can only be passively connected by other electronic devices, and cannot actively connect to other electronic devices. Similarly, in some embodiments, the fall notification can be transmitted to a web server over a wireless network. in In some embodiments, the fall notification may be transmitted over a wireless network to a particular trusted end, such as an individual's family or caregiver. It must be reminded that the delivery of the aforementioned fall notification is only an example of the present case, and the present invention is not limited thereto.

Similarly, in some embodiments, when the shortest distance is increased by a predetermined distance for a predetermined time and the area is increased by a predetermined area for a predetermined time, it can be determined whether the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period. When the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period, the individual is judged to have a fall state. In some embodiments, when it is determined that the individual has a fall collision state, a rhythm moving portion may be determined by the individual, and one of the rhythm moving portions is detected to be in a moving state. It is worth noting that in some embodiments, the rhythm moving portion includes a lung, a heart, and/or a chest. In some embodiments, the aforementioned fall notification may include a movement state of the individual's rhythm moving portion.

Figure 12 is a diagram showing a method of determining a fall state of an individual in accordance with another embodiment of the present invention. In step S1202, it is determined whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time. When the shortest distance between the individual and the electronic device does not increase the predetermined distance within a predetermined time (NO in step S1202), the determination in step S1202 is continued. When the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time (YES in step S1202), in step S1204, it is determined whether the area of the individual is increased by a predetermined area within a predetermined time. When the area of the individual does not increase the predetermined area within a predetermined time (NO in step S1204), the flow returns to step S1202. When the area of the individual is increased by a predetermined area within a predetermined time (YES in step S1204), in step S1206, it is determined that the individual has a fall state. Next, in step S1208, a countdown operation is performed. For example, a countdown job can start counting from a predetermined number of seconds, such as 30 seconds. In step S1210, it is judged whether or not the countdown job is ended. When the countdown operation has not ended (NO in step S1210), in step S1212, it is judged whether or not an interrupt instruction is received. It should be noted that in some embodiments, a specific device, such as the electronic device 110 or a smart phone, may display a countdown operation through a user interface. The aforementioned interrupt indication can be received through an input unit of a specific device, such as a touch screen. When the interrupt instruction has not been received (NO in step S1212), the flow returns to step S1210. When the interrupt instruction is received (YES in step S1212), the flow is ended. When the countdown operation ends (YES in step S1210), in step S1214, a fall notification is transmitted through a wireless network using a wireless network connection unit. As mentioned above, the wireless network connection unit can have a network access capability for accessing a wireless network. For example, a Bluetooth network, a Wi-Fi network, and the like are coupled to other electronic devices having network access capabilities. It should be noted that in some embodiments, the wireless network connection unit may be a low energy consuming technology, such as a network connection unit of Bluetooth Smart technology. There are two modes in Bluetooth Smart technology, such as peripheral mode and central mode. Wherein, in the central mode, the network connection unit can receive data from the network connection unit of other electronic devices and has the ability to actively connect to other electronic devices. In the peripheral mode, the network connection unit can broadcast signals, such as their own identification data. However, in peripheral mode, the network connection unit cannot actively connect to other electronic devices. In some embodiments, the wireless network connection unit is in a peripheral mode. In other words, the wireless network connection unit has the data broadcasting capability, and the wireless network connection unit can only be passively connected by other electronic devices, and cannot actively connect to other electronic devices. Similarly, in some embodiments, the fall notification can be transmitted to a web server over a wireless network. In some embodiments, the fall notification may be transmitted over a wireless network to a particular trusted end, such as an individual's family or caregiver. It must be reminded that the delivery of the aforementioned fall notification is only an example of the present case, and the present invention is not limited thereto.

Similarly, in some embodiments, when the shortest distance is increased by a predetermined distance for a predetermined time and the area is increased by a predetermined area for a predetermined time, it can be determined whether the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period. When the shortest distance and the area after the increase of the individual are substantially maintained for a predetermined period, the individual is judged to have a fall state. In some embodiments, when it is determined that the individual has a fall collision state, a rhythm moving portion may be determined by the individual, and one of the rhythm moving portions is detected to be in a moving state. It is worth noting that in some embodiments, the rhythm moving portion includes a lung, a heart, and/or a chest. In some embodiments, the aforementioned fall notification may include a movement state of the individual's rhythm moving portion.

The reminder is that in addition to detecting whether an individual has fallen, the case can also detect the state of the individual's work in a particular space. In Fig. 13, a set area SA can be set in the specific space SS, and the individual U can move in the specific space SS. Fig. 14 shows an example of a radar chart having a set area SA in a specific space SS.

A fifteenth display shows a fall detection method using a radar according to another embodiment of the present invention.

In step S1502, the complex radar transmission signal is transmitted in a specific space by using one of the at least one antenna radio wave transmitters. In step S1504, using at least one antenna One of the radio wave receivers receives a plurality of radar reflected signals in a particular space. Similarly, in some embodiments, the radio wave transmitter and the radio wave receiver can each include a steerable antenna. The steerable antenna can be adjusted to the angle at which it transmits/receives the radar signal. It is to be noted that in some embodiments, the radar technology employed in the present invention may be an ultrasonic radar, a microwave radar, or a laser radar. In some embodiments, the frequency of the radio waves may be in the microwave 24 GHz or millimeter wave 77 GHz band. It should be noted that the frequency of the radio wave, the radar transmission and reception technology, and the angle of the antenna setting can be adjusted according to different needs and applications, and the present invention is not limited to any specific technology. In step S1506, a Doppler analysis is performed according to the transmitted radar transmission signal and the received radar reflection signal, thereby learning one individual in a specific space. Next, in step S1508, the state of the individual entering and/or leaving the set region in the specific space is determined according to the transmitted radar transmission signal and the received radar reflection signal, and in step S1510, one of the corresponding individuals is prepared. It should be noted that in some embodiments, the work schedule data may be generated periodically and transmitted to a specific recipient via the network.

Therefore, through the use of radar fall detection system and method in this case, radar technology can be used to judge individuals in space, and according to the distance detected by the radar and the area of the individual to determine whether the individual falls, thereby increasing the accuracy of the fall determination. Sex.

The method of the invention, or a particular type or portion thereof, may exist in the form of a code. The code may be included in a physical medium such as a floppy disk, a CD, a hard disk, or any other machine readable (such as computer readable) storage medium, or is not limited to an external computer program product, wherein When the code is loaded and executed by a machine, such as a computer, the machine becomes a device for participating in the present invention. The code can also be transmitted via some transmission medium, such as a wire or cable, fiber optics, or any transmission type, where the machine becomes part of the program when it is received, loaded, and executed by a machine, such as a computer. Invented device. When implemented in a general purpose processing unit, the code combination processing unit provides a unique means of operation similar to application specific logic.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (19)

A fall detection system using a radar, applicable to an electronic device, comprising: a radio wave transmitter having at least one antenna configured to transmit a plurality of radar transmission signals in a specific space; a radio wave receiver, Having at least one antenna configured to receive a plurality of radar reflected signals in the particular space; a controller coupled to the radio wave transmitter and the radio wave receiver for configuring to transmit according to the radar Performing a Doppler analysis on the signal and the radar reflected signals to learn an individual in the specific space, determining the shortest distance of the individual to one of the electronic devices and an area of the individual, and according to the individual to the electronic The shortest distance between the devices and the area of the individual determines whether the individual has a fall condition. The fall detection system using the radar according to claim 1, wherein the controller further determines whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time, and the area of the individual Whether a predetermined area is added within the predetermined time, and when the shortest distance increases the predetermined distance within the predetermined time and the area increases the predetermined area within the predetermined time, determining that the individual has the falling state occurs. The radar fall detection system according to claim 2, wherein the controller further determines when the shortest distance increases the predetermined distance within the predetermined time and the area increases the predetermined area within the predetermined time Whether the shortest distance after the increase of the individual and the area remain substantially unchanged for a predetermined period, when the shortest distance after the increase of the individual and the area remain substantially unchanged for the predetermined period, the individual is determined to have the fall state. The fall detection system using the radar according to the first aspect of the patent application, wherein the specific area includes a set area, and the controller further determines, according to the radar transmission signals and the radar reflection signals, whether the individual enters or leaves the The area is set to record the work schedule information of the corresponding individual. According to claim 1, the fall detection system using the radar, wherein when the individual has the fall state, the controller further determines a rhythm moving part from the individual, and detects one of the rhythm moving parts to move. status. A fall detection system using a radar according to claim 5, wherein the rhythm moving portion includes a lung, a heart, or a chest. The radar fall detection system according to claim 5, further comprising a wireless network connection unit, wherein when the individual is in the fall state, the controller uses the wireless network connection unit to pass through a wireless network A fall notification is sent, wherein the fall notification includes the movement state of the rhythm moving portion. The radar fall detection system according to claim 7 , wherein when the individual has the fall state, the controller performs a countdown operation and transmits the wireless network after the countdown operation ends. The fall notification. According to claim 8 of the invention, in the fall detection system using the radar, when the individual has the fall state, the controller further displays the countdown operation through a user interface by using a specific device, and determines the countdown operation. Whether an interrupt indication is received before the end of the job, and when the interrupt indication is received before the end of the countdown operation, the transmission of the corresponding fall notification is canceled. A fall detection method using a radar, which is applicable to an electronic device, comprising the steps of: transmitting a complex radar transmission signal in a specific space by using a radio wave transmitter having at least one antenna; using a radio wave having at least one antenna Receiving, by the receiver, a plurality of radar reflection signals in the specific space; performing a Doppler analysis on the radar transmission signals and the radar reflection signals to learn an individual in the specific space; determining the individual to the electronic device One of the shortest distances and one of the areas of the individual; and determining whether the individual has a fall state based on the shortest distance between the individual and the electronic device and the area of the individual. The method for detecting a fall using the radar according to claim 10 of the patent application scope further includes the following steps: determining whether the shortest distance between the individual and the electronic device is increased by a predetermined distance within a predetermined time; determining the area of the individual Whether to increase a predetermined area within the predetermined time; and when the shortest distance increases the predetermined distance within the predetermined time and the area increases the predetermined area within the predetermined time, determining that the individual has the falling state. According to the claim 11 of the patent application, the method for detecting the fall of the radar includes the following steps: When the shortest distance increases the predetermined distance within the predetermined time and the area increases the predetermined area within the predetermined time, determining whether the shortest distance after the increase of the individual and the area remain substantially unchanged for a predetermined period; When the shortest distance after the increase of the individual and the area remain substantially unchanged for the predetermined period, it is determined that the individual has the fall state. The method for detecting a fall using the radar according to claim 10 of the patent application scope further includes: determining, according to the radar transmission signal and the radar reflection signals, whether the individual enters or leaves a setting area in the specific area, thereby recording the phase Should be one of the individual work and rest information. According to the claim 10 of the patent application, the method for detecting the fall of the radar further includes the following steps: when the individual has the fall state, determining a rhythm moving part from the individual; and detecting that the rhythm moving part moves status. The fall detection method using the radar according to claim 14 of the patent application, wherein the rhythm moving portion includes a lung, a heart, or a chest. The method for detecting a fall of a radar according to claim 14 of the patent application scope, further comprising: when the individual is in the fall state, transmitting a fall notification through a wireless network by using a wireless network connection unit, wherein the fall notification includes the The moving state of the rhythm moving part. According to the claim 16 of the patent application, the method for detecting the fall of the radar includes the following steps: When the individual has the fall state, performing a countdown operation; and transmitting the fall notification through the wireless network after the countdown operation ends. According to the claim 17 of the invention, the method for detecting the fall of the radar further includes the following steps: when the individual has the fall state, displaying the countdown operation through a user interface by using a specific device; determining the countdown operation Whether an interrupt indication is received before the end; and when the interrupt indication is received before the end of the countdown operation, the transmission of the corresponding fall notification is canceled. A computer program product for being loaded by a machine and performing a radar fall detection method, the computer program product comprising: a first code for utilizing a radio wave transmitter having at least one antenna Transmitting a plurality of radar transmission signals in a specific space; a second code for receiving a plurality of radar reflection signals in the specific space by using a radio wave receiver having at least one antenna; and a third code for using the third code The radar transmitting signal performs a Doppler analysis on the radar reflected signals to learn an individual in the specific space; a fourth code is used to determine the shortest distance between the individual and the electronic device and the individual One area; a fifth code for determining whether the individual has a fall state based on the shortest distance between the individual and the electronic device and the area of the individual.