CN114419844A - Tumble monitoring method, device and system - Google Patents
Tumble monitoring method, device and system Download PDFInfo
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- 238000012806 monitoring device Methods 0.000 claims abstract description 36
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- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000010365 information processing Effects 0.000 claims description 4
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
- G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
- G08B21/043—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting an emergency event, e.g. a fall
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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Abstract
The invention discloses a tumble monitoring method, a tumble monitoring device and a tumble monitoring system; the method comprises the steps of obtaining 2 paths of monitoring signal information under the same monitoring scene in real time, carrying out FFT (fast Fourier transform) on the 2 paths of monitoring signal information respectively, carrying out 2D-FFT to obtain distance information and speed information of all monitoring targets respectively, carrying out phase operation on the preset monitoring targets after the preset monitoring targets are screened out according to the obtained distance information and speed information to obtain angle values of the monitoring targets, obtaining height information of the monitoring targets according to the distance information and the angle values of the monitoring targets, and finally judging whether tumbling behaviors exist or not according to the height information of the monitoring targets. The tumble monitoring method solves the technical problem of low accuracy of tumble monitoring methods in the related technology, and provides a reliable tumble monitoring method with high accuracy.
Description
Technical Field
The invention relates to the technical field of information monitoring, in particular to a tumble monitoring method, device and system.
Background
With the development of scientific technology, various emergency devices are applied to various scenes so as to find out in time to take corresponding measures when an emergency occurs. In the correlation technique, in places such as asylum for the aged and bathroom, monitor the personnel that are in monitoring range through being provided with to fall down monitoring devices, can not in time discover in order to carry out emergency rescue when preventing that the accident from taking place. In the related art, the fall monitoring device is usually installed at the indoor top, and whether a person falls down in the monitoring range is judged by detecting the instantaneous change value of the distance, however, due to the inconsistency of the falling postures of the human body and the uncertainty of the behaviors of the person, the accuracy rate of the monitoring method is low, and the occurrence of the fall behavior is easy to be triggered by mistake and cannot be triggered in time.
Therefore, how to overcome the technical problem of low accuracy in the monitoring method of the fall monitoring device becomes a difficult problem to be faced by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a tumble monitoring method, a tumble monitoring device and a tumble monitoring system, which are used for solving the technical problem of low tumble monitoring accuracy in the related technology.
In a first aspect, an embodiment of the present invention provides a fall monitoring method, including:
acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
after FFT conversion is respectively carried out on the 2 paths of monitoring signal information, 2D-FFT conversion is carried out to respectively obtain distance information and speed information of all monitoring targets;
screening out a preset monitoring target according to the distance information and the speed information;
performing phase operation on the preset monitoring target to obtain a monitoring target angle value;
obtaining monitoring target height information according to the distance information and the monitoring target angle value;
and if the height information of the monitoring target is gradually reduced and does not change at a certain height value, judging that the falling condition exists.
The tumble monitoring method provided by the embodiment of the invention at least has the following beneficial effects:
the invention provides a tumbling monitoring method, which comprises the steps of obtaining 2 paths of monitoring signal information under the same monitoring scene in real time, carrying out FFT (fast Fourier transform) on the 2 paths of monitoring signal information respectively, carrying out 2D-FFT (two-dimensional-fast Fourier transform) to obtain distance information and speed information of all monitoring targets respectively, screening out preset monitoring targets according to the obtained distance information and speed information, carrying out phase operation on the preset monitoring targets to obtain angle values of the monitoring targets, obtaining height information of the monitoring targets according to the distance information and the angle values of the detection targets, and finally judging whether tumbling behaviors exist according to the height information of the monitoring targets. The tumble monitoring method solves the technical problem of low accuracy of tumble monitoring methods in the related technology, and provides a reliable tumble monitoring method with high accuracy.
According to another embodiment of the invention, the screening out the preset monitoring target according to the distance information and the speed information includes:
and screening the monitoring target with the speed information of 0 or the distance information of more than 2 meters to obtain the preset monitoring target.
According to another embodiment of the tumble monitoring method of the present invention, the performing phase operation on the preset monitoring target to obtain the angle value of the monitoring target includes:
performing phase operation on the preset monitoring target by the following formula:
wherein p ishaseFor the phase, obj _ real is the real part of the preset monitoring target after 2D-FFT transformation, and obj _ imag is the imaginary part of the preset monitoring target after 2D-FFT transformation; the preset monitoring target comprises a first path monitoring target and a second path monitoring target, and the phase value phase of the first path monitoring target is obtained through the above formularx1And the phase value phase of the second path monitoring targetrx2Then, obtaining the monitoring target angle value through the following formula:
angle＝phaserx1-phaserx2
and the angle is the angle value of the monitoring target.
According to another embodiment of the invention, the fall monitoring method further comprises obtaining the height information of the monitoring target according to the distance information and the angle value of the monitoring target by the following formula:
wherein objrangeAnd y is the height information of the monitoring target.
In accordance with further embodiments of the invention, the fall monitoring method further comprises:
if the situation of falling is judged to exist, an alarm signal is output for prompting that the situation of falling is monitored.
In a second aspect, an embodiment of the invention provides a fall monitoring device comprising:
the information acquisition module is used for acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
the data information processing module is used for respectively carrying out FFT (fast Fourier transform) on the 2-path monitoring signal information, carrying out 2D-FFT to respectively obtain distance information and speed information of all monitoring targets, screening out preset monitoring targets according to the distance information and the speed information, carrying out phase operation on the preset monitoring targets to obtain angle values of the monitoring targets, and obtaining height information of the monitoring targets according to the distance information and the angle values of the monitoring targets;
and the data information judgment module is used for judging whether the height information of the monitoring target is gradually reduced or not and judging whether the height value is not changed any more, and if so, judging that the falling condition exists.
According to further embodiments of the invention, the fall monitoring device further comprises:
and the alarm prompting module is used for receiving the alarm information of the data information judging module and outputting an alarm prompting signal according to the alarm information.
In a third aspect, an embodiment of the present invention provides a fall monitoring system, including a signal monitoring device, an alarm prompting device, and the fall monitoring device;
the signal monitoring device is used for acquiring 2 paths of monitoring signal information in real time and sending the monitoring signal information to the fall monitoring device, and the fall monitoring device is used for controlling the on-off of the alarm prompting device according to the received monitoring signal information.
According to further embodiments of the fall monitoring system of the present invention, the signal monitoring device is a radar.
According to other embodiments of the invention, the fall monitoring system further comprises a warning device comprising one or more of a buzzer or an LED warning light.
Drawings
Fig. 1 is a flowchart of an embodiment of a fall monitoring method according to the present invention;
fig. 2 is a flow chart of another embodiment of a fall monitoring method according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a fall monitoring apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of a fall monitoring device according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fall monitoring system according to an embodiment of the present invention.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Referring to fig. 1, a tumble monitoring method according to an embodiment of the present invention includes the following steps:
s100, acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
s200, respectively carrying out FFT (fast Fourier transform) on the acquired 2-path monitoring signal information, and then carrying out 2D-FFT to respectively acquire distance information and speed information of all monitoring targets;
s300, screening out a preset monitoring target according to the distance information and the speed information;
s400, performing phase operation on the obtained preset monitoring target to obtain a monitoring target angle value;
s500, obtaining height information of the monitoring target according to the distance information and the angle value of the detection target;
s600, if the height information of the monitored target is gradually reduced and does not change at a certain height value, judging that the falling condition exists.
In this embodiment, the step of simultaneously acquiring 2 paths of monitoring signal information in the same monitoring scene is to receive the monitoring signal information in the same scene through 2 information receiving terminals, and the acquired monitoring signal information is Chirp (linear frequency modulation signal), wherein 256 points are sampled, and 64 Chirp is continuously acquired. And after FFT and 2D-FFT conversion are carried out on the received monitoring signal information, distance information and speed information of all monitoring targets in the current monitoring scene are obtained, and the preset monitoring targets are screened out according to the obtained distance information and speed information. In this embodiment, the preset monitoring target is screened out according to the distance information and the speed information, so as to reduce the data processing process and improve the accuracy of tumble monitoring.
In this embodiment, after the preset monitoring target is screened out, phase operation is performed on the preset monitoring target to obtain a monitoring target angle value, and monitoring target height information is calculated according to the obtained distance information and the detection target angle value; when the height information of the monitoring target is gradually reduced and does not change at a certain height value, judging that the current monitoring scene has a tumbling condition. In the embodiment, whether the falling condition exists is judged by monitoring gradual change of the target height information and judging whether a certain height value does not change any more, so that the technical problem that in the related technology, the judgment of the falling behavior is judged by detecting an instantaneous distance value, but the accuracy of the monitoring method is low due to inconsistency of the falling postures of the human body and uncertainty of the behavior of personnel (such as the behaviors of standing up after bending down or standing up after squatting and the like) is solved, and the reliable and high-accuracy falling monitoring method is provided.
In some embodiments, the screening out the preset monitoring target according to the distance information and the speed information in step S300 includes:
and screening the monitoring target with the speed information of 0 or the distance information of more than 2 meters to obtain a preset monitoring target. In this embodiment, the purpose of screening out the monitoring target with the speed of 0 is to reduce the complexity of data processing and increase the data processing speed. In addition, the monitoring targets larger than 2 meters are screened out, so that the monitoring targets with longer distances are screened out, and the reliability and the accuracy of tumble monitoring are improved.
In some embodiments, the step S400 performs a phase operation on the obtained preset monitoring target, and obtaining the angle value of the monitoring target includes:
performing phase operation on a preset monitoring target by the following formula (1):
wherein p ishaseFor the phase, obj _ real is the real part of the preset monitoring target after 2D-FFT conversion, and obj _ imag is the imaginary part of the preset monitoring target after 2D-FFT conversion; the tumble monitoring method of the embodiment of the invention simultaneously acquires 2 paths of monitoring signal information in the same monitoring scene through 2 information interfacesThe receiving end receives monitoring signal information of the same scene, therefore, the preset monitoring target comprises a first path of monitoring target and a second path of monitoring target, and the phase value phase of the first path of monitoring target is obtained through the formula (1)rx1And phase value phase of the second path monitoring targetrx2Then, a monitoring target angle value is obtained by the following formula (2):
angle＝phaserx1-phaserx2 (2)
wherein, angle is the angle value of the monitoring target.
In some embodiments, the step S500 of deriving the monitored target height information according to the distance information and the angle value of the detected target includes:
obtained by the following formula (3):
wherein objrangeFor the obtained distance information, y is the monitoring target height information.
Referring to fig. 2, in some embodiments, a fall monitoring method according to an embodiment of the present invention further includes:
s700, if the situation of the fall is judged to exist, outputting an alarm signal for prompting the monitoring of the situation of the fall. In this embodiment, when the height information of the monitoring target is gradually reduced and does not change any more at a certain height value in step S600, it is determined that a fall condition exists, and step S700 is executed to output an alarm signal to the outside for prompting the occurrence of the fall condition.
Referring to fig. 3, an embodiment of the present invention provides a fall monitoring device, including:
the information acquisition module is used for acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
the data information processing module is used for respectively carrying out FFT (fast Fourier transform) on the 2-path monitoring signal information, carrying out 2D-FFT to respectively obtain distance information and speed information of all monitoring targets, screening out preset monitoring targets according to the distance information and the speed information, carrying out phase operation on the preset monitoring targets to obtain angle values of the monitoring targets, and obtaining height information of the monitoring targets according to the distance information and the angle values of the monitoring targets;
and the data information judgment module is used for judging whether the height information of the monitoring target is gradually reduced or not and judging whether the height value is not changed any more, and if so, judging that the falling condition exists.
In this embodiment, 2 ways of monitoring signal information are obtained through being provided with the information acquisition module, and after 2 ways of monitoring signal information that will obtain are transmitted to data information processing module and are carried out data processing, reachs monitoring target height information, and data information judge module is used for receiving monitoring target height information after, judges whether monitoring target height information reduces gradually, and judges whether no longer changes at a certain altitude value, if, then judges to have the condition of tumbleing. In the embodiment, whether the falling condition exists is judged by monitoring gradual change of the target height information and judging whether the target height value does not change any more, so that the technical problem that the accuracy of the monitoring method is low due to inconsistency of the falling postures of the human body and uncertainty of the behaviors of the personnel (such as behaviors of standing up after bending down or standing up after squatting) in the related technology is solved, and the reliable and high-accuracy falling monitoring device is provided.
Referring to fig. 4, in some embodiments, the fall monitoring device further comprises an alert prompt module. In this embodiment, the alarm prompting module is configured to receive the alarm information sent by the data information determining module, that is, when the data information determining module determines that the fall-down condition exists, the alarm prompting module is controlled to output an alarm prompting signal. In the embodiment, the alarm prompt module is arranged for outputting the alarm prompt signal outwards, so that corresponding rescue measures can be found in time when the condition of falling is monitored.
Referring to fig. 5, an embodiment of the present invention provides a fall monitoring system, which includes a signal monitoring device, an alarm prompting device, and the fall monitoring device. Wherein, the output of signal monitoring devices is connected with the input of the monitoring devices that tumble, and the output of the monitoring devices that tumble is connected with the input of warning prompt device. In this embodiment, after signal monitoring device was used for 2 way monitoring signal information of real-time collection, 2 way monitoring signal information with the collection sent to the monitoring device that tumbles, whether tumble monitoring device has the condition of tumbleing under judging the current monitoring scene according to 2 way monitoring signal information of receipt, if judge to have the condition of tumbleing, then output alarm control signal control warning suggestion device sends out and reports an emergency and asks for help or increased vigilance suggestion information. In this embodiment, the process of processing the data information after the fall monitoring device receives the 2-path monitoring signal information may refer to the specific description of the above embodiment, which is not described herein in detail. The embodiment provides a fall monitoring system, whether the condition of whether having a fall is judged through the gradual change of monitoring target height information, and whether no longer change at a certain height value and judge, thereby solved among the correlation technique, fall monitoring system judges the fall action and judges through detecting instantaneous distance value, nevertheless because the human body falls the posture nonconformity and personnel's action uncertainty (for example the action such as standing up after bending down or standing up after squatting) thus the monitoring method rate of accuracy that leads to is low technical problem, a reliable, high rate of accuracy fall monitoring system is provided.
In some embodiments, the signal monitoring device is a radar, and in this embodiment, the radar is of a one-transmission two-reception type, which can acquire 2-path monitoring signal information. In practical application, the height of the radar installation is generally set to be 1.5 meters away from the ground, but can be adjusted adaptively according to specific practical application scenarios.
In some embodiments, the alert device comprises one or more of a buzzer or an LED indicator light. When the falling monitoring device monitors that the falling condition exists, the control signal is sent to control the buzzer to sound or the LED prompting lamp to light (twinkle) or the buzzer sounds and the LED prompting lamp to light.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A fall monitoring method, comprising:
acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
after FFT conversion is respectively carried out on the 2 paths of monitoring signal information, 2D-FFT conversion is carried out to respectively obtain distance information and speed information of all monitoring targets;
screening out a preset monitoring target according to the distance information and the speed information;
performing phase operation on the preset monitoring target to obtain a monitoring target angle value;
obtaining monitoring target height information according to the distance information and the monitoring target angle value;
and if the height information of the monitoring target is gradually reduced and does not change at a certain height value, judging that the falling condition exists.
2. The fall monitoring method according to claim 1, wherein the screening out a preset monitoring target according to the distance information and the speed information comprises:
and screening the monitoring target with the speed information of 0 or the distance information of more than 2 meters to obtain the preset monitoring target.
3. The fall monitoring method according to claim 1 or 2, wherein the performing a phase operation on the preset monitoring target to obtain an angle value of the monitoring target comprises:
performing phase operation on the preset monitoring target by the following formula:
wherein, phaseFor the phase, obj _ real is the real part of the preset monitoring target after 2D-FFT transformation, and obj _ imag is the imaginary part of the preset monitoring target after 2D-FFT transformation; the preset monitoring target comprises a first path monitoring target and a second path monitoring target, and the phase value phase of the first path monitoring target is obtained through the above formularx1And the phase value phase of the second path monitoring targetrx2Then, obtaining the monitoring target angle value through the following formula:
angle＝phaserx1-phaserx2
and the angle is the angle value of the monitoring target.
4. The fall monitoring method according to claim 3, characterized in that said deriving of the monitoring target height information from said distance information and said monitoring target angular value is obtained by the following formula:
wherein objrangeAnd y is the height information of the monitoring target.
5. The fall monitoring method according to claim 4, characterized in that it further comprises:
if the situation of falling is judged to exist, an alarm signal is output for prompting that the situation of falling is monitored.
6. A fall monitoring device, comprising:
the information acquisition module is used for acquiring 2 paths of monitoring signal information under the same monitoring scene in real time;
the data information processing module is used for respectively carrying out FFT (fast Fourier transform) on the 2-path monitoring signal information, carrying out 2D-FFT to respectively obtain distance information and speed information of all monitoring targets, screening out preset monitoring targets according to the distance information and the speed information, carrying out phase operation on the preset monitoring targets to obtain angle values of the monitoring targets, and obtaining height information of the monitoring targets according to the distance information and the angle values of the monitoring targets;
and the data information judgment module is used for judging whether the height information of the monitoring target is gradually reduced or not and judging whether the height value is not changed any more, and if so, judging that the falling condition exists.
7. The fall monitoring device according to claim 6, characterized in that it further comprises:
and the alarm prompting module is used for receiving the alarm information of the data information judging module and outputting an alarm prompting signal according to the alarm information.
8. A fall monitoring system comprising a signal monitoring device, an alarm prompting device and the fall monitoring device of claim 7;
the signal monitoring device is used for acquiring 2 paths of monitoring signal information in real time and sending the monitoring signal information to the fall monitoring device, and the fall monitoring device is used for controlling the on-off of the alarm prompting device according to the received monitoring signal information.
9. The fall monitoring system of claim 8, wherein the signal monitoring device is a radar.
10. The fall monitoring system according to claim 8 or 9, wherein the alarm prompting device comprises one or more of a buzzer or an LED prompting light.
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| CN112545496A (en) * | 2020-11-09 | 2021-03-26 | 金茂智慧科技(广州)有限公司 | Wireless technology identification method for detecting human body tumble |
| CN112782681A (en) * | 2020-12-31 | 2021-05-11 | 杭州电子科技大学 | Indoor positioning and falling detection system and method based on millimeter waves and Internet of things |
| CN113453180A (en) * | 2021-06-06 | 2021-09-28 | 西安电子科技大学 | Intelligent detection method and system for human body tumble and information data processing terminal |
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2022
- 2022-01-20 CN CN202210064769.4A patent/CN114419844B/en active Active
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| CN105448041A (en) * | 2016-01-22 | 2016-03-30 | 苏州望湖房地产开发有限公司 | A human body falling intelligent control system and method |
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