CN113793475A - System and method for detecting falling of old people in key area - Google Patents

System and method for detecting falling of old people in key area Download PDF

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Publication number
CN113793475A
CN113793475A CN202110894815.9A CN202110894815A CN113793475A CN 113793475 A CN113793475 A CN 113793475A CN 202110894815 A CN202110894815 A CN 202110894815A CN 113793475 A CN113793475 A CN 113793475A
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falling
detecting
alarm
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key area
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王智
马敏
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Nanjing College of Information Technology
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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
    • G08B21/0438—Sensor means for detecting
    • G08B21/0461—Sensor means for detecting integrated or attached to an item closely associated with the person but not worn by the person, e.g. chair, walking stick, bed sensor
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/008—Alarm setting and unsetting, i.e. arming or disarming of the security system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/016—Personal emergency signalling and security systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Gerontology & Geriatric Medicine (AREA)
  • Emergency Alarm Devices (AREA)
  • Alarm Systems (AREA)

Abstract

The invention discloses a system and a method for detecting falling of an old man in a key area in the field of monitoring and early warning, wherein the system comprises the following steps: the detection module periodically detects the key areas, acquires distance information and transmits the distance information to the main control module; the main control module detects and identifies the distance information based on a falling detection method, and transmits an alarm signal to the alarm module and the help-seeking module if the falling state is detected; and the help seeking module is used for wirelessly transmitting the alarm information to the appointed terminal based on the alarm signal. According to the invention, the timely feedback of the falling condition of the old people is realized by detecting and early warning the key area, in addition, the problem that the old people in the key area cannot know the optimal rescue opportunity after falling down in the family and miss the optimal rescue opportunity is solved by detecting the falling of the old people in the key area through the laser radar, and the system does not leak privacy, does not need to be worn and is very convenient. The method for detecting the falling of the old people can quickly and accurately identify the falling of the old people, has the functions of automatic alarm and alarm release, solves the problems of missing report and false report, and improves the reliability of the system.

Description

System and method for detecting falling of old people in key area
Technical Field
The invention relates to a system and a method for detecting falling of old people in key areas, and belongs to the technical field of monitoring and early warning.
Background
With age, the probability of accidental injury to the elderly is increasing. According to reports issued by the world health organization, over 30 million people die from falls every year worldwide, with over 60 years of age accounting for more than half. In the event of falling of the old, the falling rate at home is more than 51.5%. The incidence of complications is high and the severity is high after the old falls. The mild case has soft tissue injury, the severe case has fracture, cerebral hemorrhage and even death. The situation that the best treatment time is missed due to the fact that the family is not contacted in time occurs. Therefore, it is necessary to design a system which can automatically monitor the fall of the old and help the old living alone to quickly contact with family in emergency.
At present, the fall monitoring methods for the elderly mainly include the following two types: the first method is to use a camera or an infrared thermal imaging sensor to collect human body images and perform form recognition through an image processing technology so as to determine whether a user falls down. The second method is to detect the acceleration of the human body by using an acceleration sensor to determine whether the user falls, and the method needs to wear a device and is inconvenient to use.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a system and a method for detecting the falling of the old people in the key area, so that the monitoring and early warning of the key area are realized, and the falling condition of the old people can be fed back in time.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a system for detecting falls of an elderly person in a critical area, comprising:
the detection module periodically detects the key areas, acquires distance information and transmits the distance information to the main control module;
the main control module detects and identifies the distance information based on a falling detection method, and transmits an alarm signal to the alarm module and the help-seeking module if the falling state is detected;
the distress module is used for wirelessly transmitting the alarm information to the appointed terminal based on the alarm signal;
the alarm module triggers an alarm state based on the alarm signal;
and the releasing module is used for releasing the alarm state based on a releasing instruction of the user and wirelessly transmitting the false alarm message to the appointed terminal.
Further, the detection module is a laser radar placed in a key detection area, the placement height of the detection module is the height of the waist of a human body, and the key detection area comprises a toilet, a bedside and a sofa.
Further, the wireless transmission comprises short messages, telephone calls and internet pushing, and the appointed terminal is a mobile phone terminal of a user family.
In a second aspect, the invention provides a method for detecting the falling of an old man in a key area, which comprises the following steps:
periodically detecting key areas and collecting distance information;
detecting and identifying the distance information based on a falling detection method;
if the falling state is detected, triggering an alarm state, and wirelessly transmitting an alarm message to a designated terminal, otherwise, not executing an alarm operation;
and after receiving a releasing instruction of the user, releasing the alarm state, and wirelessly transmitting the false alarm message to the appointed terminal.
Further, the fall detection method specifically comprises the following steps:
collecting initial distance array { d ^ of key area i0, 1, 2, n, wherein d ^ diThe distance between an environmental object detected by the laser radar in a horizontal range and the laser radar is obtained;
acquiring real-time measurement values of key areas to obtain a distance array { di}，i＝0，1，2，...，n；
Will array distance diAnd initial distance array { d ^ s }iGet the difference to get the absolute value of { d'i0, 1, 2, n, vs. absolute value { d'iGet the foreground sequence { f } with the threshold D i0, 1, 2, n, wherein,
Figure BDA0003197463320000031
Figure BDA0003197463320000032
calculating the number M of sampling points corresponding to the minimum width of the human body,
Figure BDA0003197463320000033
wherein L is the minimum width of the human body,
Figure BDA0003197463320000034
the average value of the current measured values corresponding to the elements marked as 1 continuously in the foreground sequence is obtained, and delta theta is the measured angle resolution;
if the foreground sequence { fiIf the continuous number of the elements with the median value of 1 is not less than M, the object or the human body is considered, and the current measured value sequence corresponding to the subsequence is recorded as O ═ djP, p + 1.., q, calculating the geometric center position of the measurement subsequence O:
Figure BDA0003197463320000035
wherein (X)j，Yj)＝(dj·cos(j·Δθ)，dj·sin(j·Δθ))；
Judgment point (X)j，Yj) If the position is near the boundary of the key area, if the flag is set to be 1 near the key area, otherwise, the flag is set to be 0, namely:
Figure BDA0003197463320000036
wherein the content of the first and second substances,
Figure BDA0003197463320000037
l is the maximum value of the distance measured by the laser radar, le is the length threshold value, theta is the maximum angle measured by the laser radar, and theta e is the angle threshold value;
continuing to collect real-time measurementsAnd calculates the foreground sequence of the next frame of measurements fiIf { f of next frame measurement value }iIf the number of the continuous 1 s is not less than M, continuously calculating the geometric center position of the measurement quantum sequence O; otherwise, no object or human body appears, a flag value in the last frame of measured value is obtained, if the value is 0 and the detection times are N times, the falling state is judged, and otherwise, the real-time measured value is continuously acquired.
Further, the detection module is a laser radar placed in a key detection area, the placement height of the detection module is the height of the waist of a human body, and the key detection area comprises a toilet, a bedside and a sofa.
Further, the wireless transmission comprises short messages, telephone calls and internet pushing, and the appointed terminal is a mobile phone terminal of a user family.
In a third aspect, a device for detecting falling of an elderly person in a key area comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any of the above.
In a fourth aspect, a computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods described above.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the timely feedback of the falling condition of the old people is realized by detecting and early warning the key area, in addition, the problem that the old people in the key area cannot know the optimal rescue opportunity after falling down in the family and miss the optimal rescue opportunity is solved by detecting the falling of the old people in the key area through the laser radar, and the system does not leak privacy, does not need to be worn and is very convenient. The method for detecting the falling of the old people can quickly and accurately identify the falling of the old people, has the functions of automatic alarm and alarm release, solves the problems of missing report and false report, and improves the reliability of the system.
Drawings
Fig. 1 is a diagram of a fall detection system for elderly people in a critical area according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a fall detection method for an elderly person in a critical area according to a second embodiment of the present invention;
fig. 3 is a second schematic diagram illustrating a method for detecting a fall of an elderly person in a critical area according to a second embodiment of the present invention;
fig. 4 is a flowchart of a method for detecting falls of an elderly person in a critical area according to a second embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
referring to fig. 1, a fall detection system for the elderly in the key area includes: the system comprises a detection module, a main control module, a help-seeking module, an alarm module and a release module. The detection module is a laser radar, can be flexibly placed in a key detection area, such as a toilet, a bedside, a sofa and the like, is positioned at the waist height of a person, periodically detects the key area, transmits acquired distance information to the main control module, carries out falling body characteristic identification by the main control module according to a falling detection method, triggers an alarm to sound if the detection result shows that the person falls (falls body characteristics and lasts for a certain time), and informs a mobile phone terminal of a family member by a help-seeking module through a short message telephone or internet push mode.
Example two:
referring to fig. 2-4, a method for detecting falling of an elderly in a key area includes the following steps:
periodically detecting key areas and collecting distance information;
detecting and identifying the distance information based on a falling detection method;
if the falling state is detected, triggering an alarm state, and wirelessly transmitting an alarm message to a designated terminal, otherwise, not executing an alarm operation;
and after receiving a releasing instruction of the user, releasing the alarm state, and wirelessly transmitting the false alarm message to the appointed terminal.
The detection module is a laser radar placed in a key detection area, the placement height of the detection module is the height of the waist of a human body, and the key detection area comprises a toilet, a bedside and a sofa front; the wireless transmission comprises short messages, telephone calls and internet pushing, and the appointed terminal is a mobile phone terminal of a user family.
Specifically, the fall detection method specifically includes the following steps:
1) initializing flag bit flag to be 1, and collecting background data: obtaining an initial distance array of the room according to the scanning result of the laser radar: { d ^ di}，i＝0，1，2，…，n，d^iThe angular resolution of the measurement is Δ θ for the distance between the lidar and the environmental object detected by the lidar in the horizontal range, as shown in fig. 2.
2) Collecting real-time measured values to obtain a distance array { diI-0, 1, 2, …, n, as shown in fig. 3.
3) The distance array is subtracted from the initial distance array to obtain { d ’ i0, 1, 2, …, n. If the element value of the absolute value after the difference is less than or equal to the threshold value D, judging the element value as the background and marking the element value as 0; otherwise it is marked as 1. Obtain a foreground sequence f i0, 1, 2, n, wherein,
Figure BDA0003197463320000061
4) calculating the number M of sampling points corresponding to the minimum width of the human body,
Figure BDA0003197463320000062
wherein L is the minimum width of the human body,
Figure BDA0003197463320000063
is the average of the current measurements corresponding to the elements consecutively labeled 1 in the foreground sequence.
5) If { fiThe continuous number of the elements with the median value of 1 in the sequence is more than or equal to M, the current measured value sequence corresponding to the subsequence is regarded as an object or a human body, and the current measured value sequence is recorded as O ═ djJ ═ p, p + 1. Calculating the geometric center position of the measurement subsequence O:
Figure BDA0003197463320000064
wherein (X)j,Yj)＝(dj·cos(j·Δθ),djSin (j · Δ θ)), and judging whether the point is near the boundary of the radar detection area according to a formula, if so, setting a flag to be 1, otherwise, setting the flag to be 0.
Figure BDA0003197463320000065
Wherein the content of the first and second substances,
Figure BDA0003197463320000066
l is the maximum value of the measuring distance of the laser radar; le is a length threshold value, theta is a laser radar measurement maximum angle, and theta e is an angle threshold value. Next, execution is continued from step 2.
6) If { fiContinuously, no M1 s exist in the sequence, no object or human body appears, a flag value in the previous frame of measured value is obtained, if the value is 1, the judgment is normal, and the execution is continued from the step 2; otherwise, judging that the person falls down, and if the detection times are less than N, continuing to execute from the step 2; and if the detection times are N times and the state is still a falling state, starting an alarm program.
Example three:
the embodiment of the invention also provides a device for detecting the falling of the old in the key area, which comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method of any of the second embodiment.
Example four:
the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is used to implement the steps of the method in any one of the second embodiment when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A system for detecting falling of the old in the key area is characterized by comprising:
the detection module periodically detects the key areas, acquires distance information and transmits the distance information to the main control module;
the main control module detects and identifies the distance information based on a falling detection method, and transmits an alarm signal to the alarm module and the help-seeking module if the falling state is detected;
the distress module is used for wirelessly transmitting the alarm information to the appointed terminal based on the alarm signal;
the alarm module triggers an alarm state based on the alarm signal;
and the releasing module is used for releasing the alarm state based on a releasing instruction of the user and wirelessly transmitting the false alarm message to the appointed terminal.
2. The system for detecting the fall of the old people in the key area according to claim 1, wherein the detection module is a laser radar placed in the key detection area, the placement height of the detection module is the height of the waist of a human body, and the key detection area comprises a toilet, a bedside and a sofa.
3. The system for detecting the falling of the old people in the key area according to claim 1, wherein the wireless transmission comprises short messages, telephone calls and internet pushing, and the designated terminal is a mobile phone terminal of a family of the user.
4. A method for detecting the falling of the old in the key area is characterized by comprising the following steps:
periodically detecting key areas and collecting distance information;
detecting and identifying the distance information based on a falling detection method;
if the falling state is detected, triggering an alarm state, and wirelessly transmitting an alarm message to a designated terminal, otherwise, not executing an alarm operation;
and after receiving a releasing instruction of the user, releasing the alarm state, and wirelessly transmitting the false alarm message to the appointed terminal.
5. The method for detecting the fall of the elderly in the key area according to claim 4, wherein the method for detecting the fall specifically comprises the following steps:
collecting initial distance array { d ^ of key areai0, 1, 2, n, wherein d ^ diThe distance between an environmental object detected by the laser radar in a horizontal range and the laser radar is obtained;
acquiring real-time measurement values of key areas to obtain a distance array { di}，i＝0，1，2，...，n；
Will array distance diAnd initial distance array { d ^ s }iGet the difference to get the absolute value of { d'iN, compare absolute values { d ═ 0, 1, 2’ iGet the foreground sequence { f } with the threshold Di0, 1, 2, n, wherein fi＝
Figure FDA0003197463310000021
Calculating the number M of sampling points corresponding to the minimum width of the human body,
Figure FDA0003197463310000022
wherein L is the minimum width of the human body,
Figure FDA0003197463310000023
the average value of the current measured values corresponding to the elements marked as 1 continuously in the foreground sequence is obtained, and delta theta is the measured angle resolution;
if the foreground sequence { fiIf the continuous number of the elements with the median value of 1 is not less than M, the object or the human body is considered, and the current measured value sequence corresponding to the subsequence is recorded as O ═ djP, p + 1.., q, calculating the geometric center position of the measurement subsequence O:
Figure FDA0003197463310000024
wherein (X)j,Yj)＝(dj·cos(j·Δθ),dj·sin(j·Δθ))；
Judgment point (X)j,Yj) If the position is near the boundary of the key area, if the flag is set to be 1 near the key area, otherwise, the flag is set to be 0, namely:
Figure FDA0003197463310000025
wherein the content of the first and second substances,
Figure FDA0003197463310000026
l is the maximum value of the distance measured by the laser radar, le is the length threshold value, theta is the maximum angle measured by the laser radar, and theta e is the angle threshold value;
continuously collecting real-time measured values and calculating a foreground sequence of the next frame of measured values (f)iIf { f of next frame measurement value }iIf the number of the continuous 1 s is not less than M, continuously calculating the geometric center position of the measurement quantum sequence O; otherwise, no object or human body appears, a flag value in the last frame of measured value is obtained, if the value is 0 and the detection times are N times, the falling state is judged, and otherwise, the real-time measured value is continuously acquired.
6. The method for detecting the fall of the old people in the key area according to claim 4, wherein the detection module is a laser radar placed in the key detection area, the placement height of the detection module is the height of the waist of a human body, and the key detection area comprises a toilet, a bedside and a sofa.
7. The method for detecting the falling of the old people in the key area according to claim 4, wherein the wireless transmission comprises short messages, telephone calls and internet pushing, and the designated terminal is a mobile phone terminal of a family of the user.
8. A device for detecting the falling of the old in the key area is characterized by comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 4 to 7.
9. Computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 4 to 7.
CN202110894815.9A 2021-08-05 2021-08-05 System and method for detecting falling of old people in key area Withdrawn CN113793475A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114627618A (en) * 2022-03-30 2022-06-14 成都理想科技开发有限公司 Method for detecting falling of old people and giving alarm
CN115273401A (en) * 2022-08-03 2022-11-01 浙江慧享信息科技有限公司 Method and system for automatically sensing falling of person

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114627618A (en) * 2022-03-30 2022-06-14 成都理想科技开发有限公司 Method for detecting falling of old people and giving alarm
CN114627618B (en) * 2022-03-30 2024-02-06 成都理想科技开发有限公司 Method for detecting falling of old people and giving alarm
CN115273401A (en) * 2022-08-03 2022-11-01 浙江慧享信息科技有限公司 Method and system for automatically sensing falling of person

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Application publication date: 20211214