WO2019206346A1 - Système de suivi de mouvement d'objets - Google Patents

Système de suivi de mouvement d'objets Download PDF

Info

Publication number
WO2019206346A1
WO2019206346A1 PCT/CZ2019/050017 CZ2019050017W WO2019206346A1 WO 2019206346 A1 WO2019206346 A1 WO 2019206346A1 CZ 2019050017 W CZ2019050017 W CZ 2019050017W WO 2019206346 A1 WO2019206346 A1 WO 2019206346A1
Authority
WO
WIPO (PCT)
Prior art keywords
microcontroller
motion
accelerometer
magnetometer
motion sensor
Prior art date
Application number
PCT/CZ2019/050017
Other languages
English (en)
Inventor
Pavel PLACHKÝ
Original Assignee
IPKA s.r.o.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IPKA s.r.o. filed Critical IPKA s.r.o.
Publication of WO2019206346A1 publication Critical patent/WO2019206346A1/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1436—Mechanical actuation by lifting or attempted removal of hand-portable articles with motion detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Definitions

  • the invention relates to a system for tracking motion of objects for the purpose of tracking manipulation of movable objects.
  • Present security systems require installation of a security switchboard to which all the sensors are wired or wirelessly connected.
  • the security switchboard evaluates the information from security sensors and forwards them to the user who can be the owner of the building or a security agency.
  • the security switchboard is the most expensive element of security systems and thus largely determines when the installation of the security system pays off to the user economically. Further restriction of the installation of security systems is the requirement for mains power supply for security switchboard power supply.
  • LPWAN Low-Power-Area Network
  • LPN Low-Power-Area Network
  • LPWAN networks use the technology of radio communication LoRa (https://www.lora-alliance.org/), SigFox (http://www.sigfox.com) or NB-loT (Internet of the Things Narrowband).
  • LPWAN networks use a narrow unlicensed band approximately about 868 MHz in Europe, 915 MHz in North America, and 433 MHz in Asia, or, in the case of NB-loT, a licensed band GSSSM and LTE as well (Kais Mekki, Eddy Bajic, Frederic Chaxel, Fernand Meyer, A comparative study of LPWAN technologies for large-scale loT deployment, ICT Express, 2018, ISSN 2405- 9595).
  • the transmission of information through LPWAN networks is energy-efficient due to which it is possible to supply the transmitting modems only from regular batteries in a long term and thus minimalize frequent recharging of these batteries or the need for electrical network power supply.
  • LPWAN networks have, at the same time, wide range which is many times wider than in the case of networks working with the standard IEEE 802.15.4, eventually BLE.
  • the propagation and processing of radio signal in LPWAN networks is also substantially less influenced by building and landscape elements and far more difficult to jam, thanks to which it is possible to transmit data from places where other technologies, such as for example M2M, fail. Solutions using LPWAN networks are thus used especially in open areas or in urban developments as a complex solution that does not require a complicated technological construction.
  • Prior art has a number of limitations and restrictions. Among the significant ones are dependency on mains power supply, possibility of fooling the sensors, elimination of transmitting alarm messages by jamming the radio channel, higher purchase price determining the effectivity of usage, and the ability to secure only some situations.
  • a system for tracking motion of objects containing a remote server and a motion sensor
  • the motion sensor contains a microcontroller, an accelerometer, and a transmitting unit which is data-connected to the remote server
  • the microcontroller is data-connected to the accelerometer and the transmitting unit
  • the motion sensor further contains a power supply electrically connected to the microcontroller
  • the accelerometer and the transmitting unit characterized in that the motion sensor further contains a magnetometer electrically connected to the power supply, wherein the magnetometer is at the same time data-connected to the microcontroller, wherein the transmitting unit is further data-connected by the Low-Power Wide-Area Network type of network to the remote server.
  • the system for tracking motion of objects meets the above-mentioned objectives of energy-efficient transmission of information about motion from the motion sensor by using the transmitting unit connected to the remote server by Low -Power Wide-Area Network type of network characterized in low requirements for power supply and wide range. At the same time, it is difficult to jam the system for tracking motion of objects when using the Low-Power Wide-Area Network type of network.
  • the system for tracking motion of objects does not require any cooperation with the security switchboard, thus meeting another objective of price acceptability also in applications where it has been inefficient so far.
  • the power supply is a battery supply. In alternative embodiments, the power supply is a solar cell.
  • the accelerometer is digital, thus allowing processing of measured acceleration directly in the accelerometer.
  • the accelerometer contains a high pass filter and an anti-aliasing filter. These filters allow filtration of the measured acceleration, which allows easier evaluation of the measured acceleration because the DC component of gravitational acceleration is filtered by high pass filter and disturbing acceleration caused by the inherent noise of the accelerometer is partially filtered by the anti aliasing filter and thus, after these filtrations are performed, only the acceleration component caused by the inherent motion of the sensor, which is further evaluated by the accelerometer, remains.
  • a preferred method of tracking motion of objects by which the lower energy- intensity and minimal number of false information indicating motion of the motion sensor is achieved consists of a sequence of steps: - Periodic measurement of acceleration by the accelerometer of frequency 10 to 100 Hz, the microcontroller, the magnetometer, and the transmitting unit being in the sleep mode, waiting for a wake-up signal; - Filtration of acceleration in the accelerometer measured by the accelerometer using the high pass filter and the anti-aliasing filter and evaluation in the accelerometer, whether the filtered signal exceeds the level of acceleration from 0,0005 ms -2 to 0,01 ms 2 , indicating possible motion of the motion sensor;
  • a wake-up signal is transmitted to the microcontroller
  • the size of the magnetic field in individual axis is measured by the magnetometer and these values are sent to the microcontroller where they are saved as referential values;
  • the values of sizes of magnetic field in individual axes are measured by the magnetometer for the period TM equal to 5 to 30 s and with the frequency f m equal to 10 to 100 Hz and these measured values are sent to the microcontroller, where their evaluation by means of difference with the referential values is performed as well as storing the information about exceeding the difference size into the internal memory of the microcontroller of such values, the difference H size of which is higher than 10 to 60 mG in comparison with the referential values;
  • the transmitting unit is woken up by the microcontroller and the microcontroller transmits the information about motion of the motion sensor to the remote server through this transmitting unit by Low-Power Wide-Area Network type of network and then puts the transmitting unit to the sleep mode again and, at the same time, the magnetometer is put into the sleep mode by the microcontroller, and, at the same time, receiving information about possible motion of the motion sensor is allowed in the microcontroller and the microcontroller is subsequently put into the sleep mode;
  • the magnetometer is put into the sleep mode by the microcontroller and, at the same time, receiving information about a possible motion of the motion sensor is allowed in the microcontroller and the microcontroller is subsequently put into the sleep mode.
  • the objectives of low energy-intensity are achieved also by the fact that the magnetometer, the microcontroller, and the transmitting unit are most of the time in the sleep mode waiting for the wake-up signal and they have minimal energy consumption, at the same time, the accelerometer scans only at the frequency of 10 to 100 Hz thus further lowering the energy-intensity.
  • the minimal number of false information indicating the motion of the motion sensor is achieved by using the combination of the accelerometer and the magnetometer, the magnetometer being used to confirm the information about possible motion of the motion sensor evaluated by the accelerometer.
  • the system for tracking motion of objects further contains a user device wirelessly connected to the remote server.
  • the information about motion of the motion sensor is sent to the user device by wireless connection from the remote server.
  • the user device is a phone thanks to the wide-spread usage between users and thus the simplest implementation in comparison to the alternative embodiments.
  • the user device can be a computer, wearable electronics, or specialized device adjusted only for the usage with the system for tracking motion of objects.
  • the wireless connection of the user device is realized by mobile network thus allowing the connection of the user device with the remote server from any place which is covered by mobile networks.
  • the wireless connection can be realized using 802.1 1 standard.
  • the magnetometer and the accelerometer are at least biaxial.
  • the magnetometer and the accelerometer are rather triaxial, thus allowing the measurement of the acceleration and the size of the magnetic field in all axes.
  • the magnetometer and the accelerometer are biaxial. Description of the Drawings
  • Fig. 1 is a schematic view of the system for tracking motion of objects
  • Fig. 2 is an illustrative view of placing the housing of the motion sensor on the window
  • Fig. 3 shows the placement of the housing of the motion sensor in the window frame
  • Fig. 4 is an illustrative view of the placement of the housing of the motion sensor on the door
  • Fig. 5 shows the placement of the housing of the motion sensor in the doorframe.
  • An example of embodiment of the invention is a system for tracking motion of objects according to Figure 1 containing a remote server 2, a motion sensor 1, and a user device 8.
  • the motion sensor is connected to the remote server 2 by Low-Power Wide-Area Network (LPWAN).
  • LPWAN Low-Power Wide-Area Network
  • the connection of the motion sensor with the remote server 2 is not permanent and it is formed only for sending the information about recorded motion of the motion sensor 1_.
  • the remote server 2 is further wirelessly connected with the user device 8, wherein the connection is realized by the mobile network.
  • the connection of the user device 8 with the remote server 2 is not permanent and is always formed only to send the information about the recorded motion of the motion sensor 1_.
  • the user device 8 is a smart phone.
  • the motion sensor 1 contains a microcontroller 3, an accelerometer 4, a magnetometer 5, a power supply 6 and a transmitting unit 7.
  • the microcontroller 3 contains an internal memory.
  • the accelerometer 4 contains an anti-aliasing filter and a high pass filter.
  • the power supply 6 is a battery supply.
  • the power supply 6 is electrically connected to the microcontroller, 3, the accelerometer 4, the magnetometer 5, and the transmitting unit 7.
  • the electrical connection of the power supply 6 with the accelerometer 4, the magnetometer 5, the microcontroller 3, and the transmitting unit 7 serves for powering the accelerometer 4, the magnetometer 5, the microcontroller 3 and the transmitting unit 7 from the power supply 6.
  • the microcontroller 3 is further data-connected to the transmitting unit 7.
  • the data connection of the transmitting unit 7 with the microcontroller 3 allows transmission of the information about motion of the motion sensor 1 evaluated by the microcontroller 3 to the transmitting unit 7.
  • the transmitting unit 7 uses the LPWAN network for the data connection with the remote server 2.
  • the microcontroller 3 is further data-connected with accelerometer 4 and the magnetometer 5.
  • the information about the data measured by the accelerometer 4 and the data measured by the magnetometer 5 are transmitted to the microcontroller 3 by the data connection thereof.
  • the magnetometer 5 and the accelerometer 4 are triaxial.
  • the accelerometer 4 is in the low power mode, the accelerometer 4 measuring periodically the acceleration at the frequency of 10 Hz.
  • the acceleration measured by the accelerometer 4 is filtered by the high pass filter and the anti-aliasing filter, the DC component of gravitational acceleration being filtered by the high pass filter and the disturbing acceleration caused by inherent noise of the accelerometer 4 being partially filtered by the anti-aliasing filter. If the signal filtered in this way exceeds the level of acceleration equal, in the preferred embodiment, to 0,001 ms -2 , the accelerometer 4 evaluates that it is a possible motion of the motion sensor 1.
  • the microcontroller 3, the magnetometer 5 and the transmitting unit 7 are in the sleep mode when they do not perform any activity and only wait for the wake-up signal. If the accelerometer 4 evaluates that there is a possible motion of the motion sensor 1, the information to wake up is sent to the microcontroller 3, thus bringing it to the active state. The microcontroller 3 then wakes up the magnetometer 5 from the sleep mode and it is forbidden to receive information about a possible motion of the motion sensor 1 in the microcontroller 3 from the accelerometer 4. After bringing the magnetometer 5 to the active state, the microcontroller 3 starts to receive the measured data therefrom.
  • the microcontroller 3 reads the values of the magnetic field in the individual axes immediately after bringing the magnetometer 5 to the active state and saves them temporarily as referential values.
  • the size of the magnetic field measured by the magnetometer 5 in the individual axes is, after the referential values had been saved for the period TM at the frequency of measurement f m , sent to the microcontroller which ensures the difference between the actual size of the size of the magnetic field measured by the magnetometer 5 and the saved referential values.
  • the period TM is equal to 20 s.
  • the measurement frequency fm is 10 Hz.
  • the microcontroller 3 If the difference between the actual size of the magnetic field measured by the magnetometer 5 and the referential value exceeds the difference size equal to 30 mG, the microcontroller 3 records this into the internal memory of the microcontroller 3 as a logical value N.
  • the microcontroller 3 can identify the exceeding Ni to N n of the difference H size for the period TM, where N n is equal to the product of fm and TM, minus one. After the period TM, the microcontroller 3 evaluates, whether the number of exceeding the difference H size is higher than 9 and respectively decides, whether there is a motion of the motion sensor 1 or whether it is only a disturbing effect which exceeded the preset level of acceleration measured by the accelerometer 4 by its size.
  • the microcontroller 3 evaluates that there was no motion of the motion sensor 1, it is allowed to receive information about the motion of the motion sensor 1 in the microcontroller 3 from the accelerometer 4 and the magnetometer 5 is put into the sleep mode by the microcontroller 3. Then the microcontroller 3 is put into the sleep mode. If the microcontroller 3 evaluates that there was a motion of the motion sensor 1, the microcontroller 3 wakes the transmitting unit 7 up from the sleep mode and sends the information that there was a motion of the motion sensor 1_through this transmitting unit 7 by the LPWAN network to the remote server 2 and then puts the transmitting unit 7 back to the sleep mode.
  • the microcontroller 3 After receiving information about motion of the motion sensor 1 on the remote server 2, the information about motion of the motion sensor 1 is sent from the remote server
  • the microcontroller 3, the accelerometer 4, the magnetometer 5, the battery supply 6 and the transmitting unit 7 are arranged in the housing 9 of the motion sensor.
  • the housing 9 of the motion sensor is in the preferred embodiment detachably attached to the movable object. In an alternative embodiment, the housing 9 is inseparably attached to the movable object. In another alternative embodiment, the housing 9 of the motion sensor is integrated into the movable object.
  • the movable object is for example a window 10 or a door 13. In an exemplary embodiment according to the Figs. 2, 3, 4 or 5, where the movable object is, for example, a window 10 or a door 13 containing a frame 1 1 , 14.
  • the housing 9 of the motion sensor can be integrated into the frame 1 1 ,14 of the window 10 or of the door 13.
  • the integration into the frame 1 1 , 14 of the window 10 or the door 13 is in the place spaced apart from the attachment to the jambs and, at the same time, in the place close to the placement of the handle 12, 15.
  • the movable object can also be, for example, a car, a bike, a motorbike, a backpack, a picture, statues, a door, a door of the mailbox, or a window.
  • the system for tracking motion can be used for indication of the motion in an apartment, in the house, in the cottage, or in the cellar, wherein the motion can be, for example, an intrusion, when the indication of the motion is recorded by the motion sensor placed for example on the entrance or inside doors or windows, eventually on the doors of cupboards at the kitchen unit or on a chair, or any other object, which will be probably moved by the intruder, for example, a chair.
  • the system for tracking motion can be used for indication of intrusion into a car, which can be recorded by a motion sensor inserted, for example, in the pocket of the driver’s or passenger’s door.
  • the system for tracking motion can be used also for indication of the access of a stranger to a private content of drawers, backpacks or bags, etc.
  • the motion sensor is, for example, inserted or laid upon the desired object with the private content.
  • the system for tracking motion can be used also as a protection against tampering with documentation, a laptop, a drawer with alcohol, etc. so that the motion sensor can be placed on these objects and thus it is necessary to move with it to be able to access the tracked objects.
  • the system for tracking motion can be also used to track the arrivals, for example, of children home from school or to track elderly people living alone, where it is possible, in case of tracking arrivals, to place the motion sensor, for example, on the entrance door and in case of tracking elderly people, it can be placed, for example, on different doors of cupboards or any other objects which can be manipulated from time to time, on regular basis, and in case that does not happen, it is possible to warn the user, that this object has not been manipulated for a certain time.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un système de suivi de mouvement d'objets en vue de suivre une manipulation relative à des objets mobiles. Ceci est obtenu par un capteur de mouvement contenant un accéléromètre, un magnétomètre, le capteur étant connecté à un serveur à distance par un réseau de type réseau étendu à faible puissance.
PCT/CZ2019/050017 2018-04-27 2019-04-29 Système de suivi de mouvement d'objets WO2019206346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2018-205A CZ2018205A3 (cs) 2018-04-27 2018-04-27 Systém pro sledování pohybu objektů
CZ2018-205 2018-04-27

Publications (1)

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WO2019206346A1 true WO2019206346A1 (fr) 2019-10-31

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CZ (1) CZ2018205A3 (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114859771A (zh) * 2022-03-31 2022-08-05 北京航天时代光电科技有限公司 一种运动数据采集与控制电路

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ308992B6 (cs) * 2020-04-28 2021-11-10 Univerzita Hradec Králové Senzorický systém, zejména do oblastí se zhoršenými rozptylovými podmínkami

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015017805A1 (fr) * 2013-08-02 2015-02-05 Stephen Hollis Capteur de déplacement
US20160321897A1 (en) * 2015-04-29 2016-11-03 Senaya, Inc. Wireless asset tracking systems with heterogeneous communication
US20170352235A1 (en) * 2016-06-03 2017-12-07 Arwin Technology Limited Wireless motion monitoring system and method thereof
WO2018045434A1 (fr) * 2016-09-09 2018-03-15 Atf Services Pty Ltd Dispositif de surveillance
US20180110012A1 (en) * 2016-10-14 2018-04-19 Nanothings Inc. Printed Tracking Device and System and Method for Use in a Low Power Network

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015017805A1 (fr) * 2013-08-02 2015-02-05 Stephen Hollis Capteur de déplacement
US20160321897A1 (en) * 2015-04-29 2016-11-03 Senaya, Inc. Wireless asset tracking systems with heterogeneous communication
US20170352235A1 (en) * 2016-06-03 2017-12-07 Arwin Technology Limited Wireless motion monitoring system and method thereof
WO2018045434A1 (fr) * 2016-09-09 2018-03-15 Atf Services Pty Ltd Dispositif de surveillance
US20180110012A1 (en) * 2016-10-14 2018-04-19 Nanothings Inc. Printed Tracking Device and System and Method for Use in a Low Power Network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114859771A (zh) * 2022-03-31 2022-08-05 北京航天时代光电科技有限公司 一种运动数据采集与控制电路
CN114859771B (zh) * 2022-03-31 2023-08-29 北京航天时代光电科技有限公司 一种运动数据采集与控制电路

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