WO2019061678A1 - Procédé et appareil de détection de mouvement et dispositif de surveillance - Google Patents

Procédé et appareil de détection de mouvement et dispositif de surveillance Download PDF

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Publication number
WO2019061678A1
WO2019061678A1 PCT/CN2017/109190 CN2017109190W WO2019061678A1 WO 2019061678 A1 WO2019061678 A1 WO 2019061678A1 CN 2017109190 W CN2017109190 W CN 2017109190W WO 2019061678 A1 WO2019061678 A1 WO 2019061678A1
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Prior art keywords
sound source
sound
microphone array
polar
microphones
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PCT/CN2017/109190
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English (en)
Chinese (zh)
Inventor
向勇阳
许仿珍
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深圳市沃特沃德股份有限公司
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Publication of WO2019061678A1 publication Critical patent/WO2019061678A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
    • G01S5/22—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements

Definitions

  • the present invention relates to the field of monitoring technologies, and in particular, to a motion detection method, apparatus, and monitoring apparatus.
  • the main purpose of the present invention is to provide a motion detection method, apparatus, and monitoring device, which are designed to reduce power consumption of motion detection and improve detection accuracy.
  • an embodiment of the present invention provides a motion detection method, where the method includes the following steps:
  • determining, according to the location of the sound source and the reference position, whether the sound source has been displaced comprises:
  • the reference location is a location of a sound source acquired last time.
  • the obtaining the location of the sound source by the sound source localization technology based on the microphone array comprises:
  • the sound source is positioned by the microphone array to obtain a position of the sound source.
  • the performing sound source localization of the sound signal by using the microphone array includes:
  • the position parameter Calculating a positional parameter of the sound source according to the time delay and a distance between the two microphones in the microphone array, the position parameter determining a position of the sound source.
  • the position parameter of the sound source includes a polar coordinate of the sound source, and an angle between a polar axis of the polar coordinate system and an x-axis or a y-axis of the rectangular coordinate system, the rectangular coordinate system and the pole The origin of the coordinate system coincides.
  • the microphone array is a square array of four microphones.
  • the positional parameters of the sound source are calculated according to the following formula:
  • r is the polar diameter of the polar coordinate
  • ⁇ is the polar angle of the polar coordinate
  • ⁇ 41 , ⁇ 31 , ⁇ 21 are the delays at which the two microphones receive the sound emitted by the sound source
  • L is the side length of the square
  • C is the propagation speed of the sound.
  • the embodiment of the invention simultaneously provides a motion detection device, the device comprising:
  • a location acquisition module configured to acquire a location of the sound source by using a sound source localization technology based on a microphone array;
  • An analysis judging module configured to determine, according to the position of the sound source and the reference position, whether the sound source has been displaced
  • the alarm prompting module is configured to perform an alarm prompt when the sound source is displaced.
  • the analysis and determination module includes:
  • a calculating unit calculating a separation distance between a position of the sound source and the reference position
  • a determining unit configured to determine whether the separation distance is greater than or equal to a threshold
  • a determining unit configured to determine that the sound source is displaced when the separation distance is greater than or equal to a threshold.
  • the location obtaining module includes:
  • An acquisition unit configured to collect a sound signal through the microphone array, and detect that the sound signal is Whether it contains a voice signal;
  • a positioning unit configured to: when the voice signal includes a voice signal, perform sound source localization on the sound signal through the microphone array to obtain a position of the sound source.
  • the positioning unit includes:
  • a delay calculation subunit configured to calculate a delay of the sounds emitted by the two microphones in the microphone array received by the sound source
  • a position calculation subunit configured to calculate a position parameter of the sound source according to the time delay and a distance between the two microphones in the microphone array, the position parameter determining a position of the sound source.
  • the position calculation subunit is configured to calculate a position parameter of the sound source according to the following formula:
  • r is the polar diameter of the polar coordinate
  • ⁇ is the polar angle of the polar coordinate
  • ⁇ 41 , ⁇ 31 , ⁇ 21 are the delays at which the two microphones receive the sound emitted by the sound source
  • L is the side length of the square array
  • C is the propagation speed of the sound.
  • Embodiments of the present invention also provide a monitoring device, the monitoring device including a memory, a processor, and at least one application stored in the memory and configured to be executed by the processor, the application being configured It is used to perform the aforementioned motion detection method.
  • a motion detection method provided by an embodiment of the present invention obtains a position of a sound source by using a sound source localization technology based on a microphone array, and determines whether a sound source has been displaced according to a position and a reference position of the sound source, and occurs in the sound source.
  • the alarm prompt is given when the displacement is performed, so that the motion detection of the target is realized by the sound source localization.
  • the sound motion detection scheme of the embodiment of the present invention does not need continuous imaging, thereby greatly reducing power consumption, and the detection accuracy and sensitivity are not affected by ambient light differences. The accuracy of detection is higher, which greatly improves the stability and reliability of monitoring.
  • FIG. 1 is a flow chart of an embodiment of a motion detection method of the present invention
  • FIG. 2 is a schematic diagram of a coordinate system for positioning a sound source in an embodiment of the present invention
  • FIG. 3 is a block diagram showing an embodiment of a motion detecting apparatus according to the present invention.
  • FIG. 4 is a block diagram of a position acquisition module of FIG. 3 in FIG. 3;
  • FIG. 5 is a block diagram of the positioning unit of Figure 4.
  • FIG. 6 is a block diagram of the analysis and determination module of FIG. 3.
  • terminal and terminal device used herein include both a wireless signal receiver device, a device having only a wireless signal receiver without a transmitting capability, and a receiving and transmitting hardware. a device having the ability to perform two-way communication on a two-way communication link And devices that transmit hardware.
  • Such devices may include cellular or other communication devices having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data Processing, fax, and/or data communication capabilities; PDA (Personal Digital Assistant), which can include radio frequency receivers, pagers, Internet/Intranet access, web browsers, notepads, calendars, and/or GPS (Global Positioning System (Global Positioning System) receiver; conventional laptop and/or palmtop computer or other device having a conventional laptop and/or palmtop computer or other device that includes and/or includes a radio frequency receiver.
  • PCS Personal Communications Service
  • PDA Personal Digital Assistant
  • terminal may be portable, transportable, installed in a vehicle (aviation, sea and/or land), or adapted and/or configured to operate locally, and/or Run in any other location on the Earth and/or space in a distributed form.
  • the "terminal” and “terminal device” used herein may also be a communication terminal, an internet terminal, a music/video playing terminal, and may be, for example, a PDA, a MID (Mobile Internet Device), and/or have a music/video playback.
  • Functional mobile phones can also be smart TVs, set-top boxes and other devices.
  • the server used herein includes, but is not limited to, a computer, a network host, a single network server, a plurality of network server sets, or a cloud composed of a plurality of servers.
  • the cloud is composed of a large number of computers or network servers based on Cloud Computing, which is a kind of distributed computing, a super virtual computer composed of a group of loosely coupled computers.
  • communication can be implemented by any communication means between the server, the terminal device and the WNS server, including but not limited to, mobile communication based on 3GPP, LTE, WIMAX, and computer network communication based on TCP/IP and UDP protocols. And short-range wireless transmission based on Bluetooth and infrared transmission standards.
  • an embodiment of a motion detection method according to the present invention is provided.
  • the method may be applied to a monitoring device, and the method includes the following steps:
  • the monitoring device has a microphone array, and the microphone array is composed of at least two microphones.
  • a microphone array is composed of four microphones, and preferably constitutes a square array, that is, the distance between adjacent two microphones is equal, and four microphones are sequentially connected to form a square.
  • step S11 the monitoring device first collects a sound signal through the microphone array, and detects whether the sound signal includes a voice signal; when the sound signal includes the voice signal, the sound is reflected through the microphone array.
  • the sound signal is positioned by the sound source to obtain the position of the sound source.
  • the monitoring device can detect whether the voice signal is included in the sound signal through a voice activity detection algorithm, and the voice activity detection algorithm preferably uses a frequency band variance detection method. Specifically, the monitoring device performs voice endpoint detection. Since the frequency spectrum of the noise spectrum changes relatively gently, and the variation between the voice frequency bands is relatively severe, it is possible to determine whether there is voice activity by calculating the frequency band variance. When the band variance is greater than or equal to the threshold, it is determined that there is voice activity, indicating that the voice signal contains a voice signal; when the band variance is less than the threshold, it is determined that there is no voice activity, indicating that the voice signal does not include the voice signal.
  • the monitoring device When it is determined that there is voice activity, it indicates that the voice signal contains a voice signal, and the monitoring device performs sound source localization on the sound signal. Specifically, the monitoring device can locate the sound source by using a delay method: first calculating a delay of the sounds of the two microphones received by the sound source in the microphone array; and then according to the delay and between the two microphones in the microphone array The distance calculates the positional parameter of the sound source, which determines the position of the sound source.
  • the positional parameter of the sound source includes a polar coordinate of the sound source, and an angle between a projection of the polar axis of the polar coordinate system on the horizontal plane and an X-axis or a Y-axis of the Cartesian coordinate system.
  • the Cartesian coordinate system coincides with the origin of the polar coordinate system, and the polar coordinates include the polar diameter r and the polar angle ⁇ .
  • the microphone array includes four microphones of P1, P2, P3, and P4, and four microphones are sequentially connected to form a square with a side length L, and the sound source is S.
  • a Cartesian coordinate system is constructed based on a square.
  • the Cartesian coordinate system includes x, y, and z axes, and the origin o is in a square.
  • the vertical line is drawn from the sound source S to the xy plane, and the origin o is used as the pole point O.
  • the ray passing through the intersection of the perpendicular line and the xy plane from the pole point O is taken as the X-axis, and the z-axis is taken as the Y-axis, and a polar coordinate system is constructed.
  • OX is the polar axis
  • the angle between OX and OS is the polar angle ⁇
  • the length of the OS is the polar diameter r, that is, the polar coordinate of the sound source S is (r, ⁇ ).
  • the angle between OX and the x-axis or y-axis is thus, the positional parameters r, ⁇ and Then the position of the sound source S is determined. Therefore, just calculate r, ⁇ and The positioning of the sound source S is achieved.
  • the position parameters r, ⁇ of the sound source S can be calculated in the following manner.
  • x(n) is the signal received by the microphone
  • s(n) is the signal from the sound source
  • w(n) is the background noise
  • ⁇ is the acoustic propagation attenuation signal (generally 1)
  • ⁇ is the sound source from the sound source
  • R is the autocorrelation function
  • E is the mathematical expectation.
  • r 1 , r 2 , r 3 , and r 4 are distances between the sound source S and the microphones P1, P2, P3, and P4, respectively; r is a distance between the sound source S and the pole point O of the polar coordinate system, that is, a polar diameter; ⁇ is the angle between the polar axis OX and the OS in the polar coordinate system, that is, the polar angle; It is the angle between the polar axis OX of the polar coordinate system and the x-axis or the y-axis in the Cartesian coordinate system; L is the side length of the square formed by the four microphones sequentially connected, C is the sound propagation speed, and x, y, z are The position coordinates of the sound source S in the Cartesian coordinate system. According to formulas (5)-(14), you can get:
  • r is the polar diameter of the polar coordinates and ⁇ is the polar angle of the polar coordinates.
  • the angle between the polar axis OX of the polar coordinate system and the x-axis or the y-axis of the Cartesian coordinate system, ⁇ 41 , ⁇ 31 , ⁇ 21 are the delays of the sounds of the two microphones receiving the sound source, and L is four microphones.
  • the length of the side of the square formed by the sequential connection, and C is the propagation speed of the sound.
  • step S12 after the position of the sound source is acquired, the monitoring device determines whether the sound source has been displaced, that is, whether the position of the sound source has changed. Specifically, the monitoring device first calculates a separation distance between the position of the sound source and the reference position, and then compares the separation distance with the threshold value to determine whether the separation distance is greater than or equal to the threshold; when the separation distance is greater than or equal to the threshold, determining that the sound source occurs The displacement is determined; when the separation distance is less than the threshold, it is determined that the sound source is not displaced.
  • the threshold and reference position can be set according to actual needs.
  • the reference position may be the sound source position acquired in the previous positioning, that is, each time the current sound source position is compared with the previous sound source position, it is determined whether the sound source has a relative motion with respect to the last time.
  • the reference position may also be a preset fixed position, that is, each time the current sound source position is compared with a preset fixed position, it is determined whether the sound source deviates from the fixed position.
  • step S13 when the sound source is displaced, the monitoring device triggers the sound movement detection alarm and gives an alarm prompt. Including direct output of alarm information (such as sounding an alarm, displaying alarm information, etc.), sending alarm information and/or latest sound source position information (ie, current sound source position parameters) to the server, the designated terminal, and the like.
  • alarm information such as sounding an alarm, displaying alarm information, etc.
  • latest sound source position information ie, current sound source position parameters
  • the sound motion detection method of the embodiment of the invention can be used alone or combined with the image motion detection method and the camera function, thereby further improving the reliability of the motion detection and reducing the power consumption of the device.
  • the monitoring device further activates the camera, and performs photographing and recording with the sound source position, turns on the image motion detection function, and transmits the detection data to the server and/or the designated terminal.
  • the motion detection method of the embodiment of the present invention obtains the position of the sound source by the sound source localization technology based on the microphone array, determines whether the sound source has been displaced according to the position of the sound source and the reference position, and performs when the sound source is displaced.
  • the alarm prompts the motion detection of the target by sound source localization.
  • the sound motion detection scheme of the embodiment of the present invention does not need continuous imaging, thereby greatly reducing power consumption, and the detection accuracy and sensitivity are not affected by ambient light differences. The accuracy of detection is higher, which greatly improves the stability and reliability of monitoring.
  • the device includes a location acquisition module 10, an analysis and determination module 20, and an alarm prompting module 30, wherein: the location acquisition module 10 is configured to acquire a location of the sound source by using a sound source localization technology based on the microphone array; and the analysis and determination module 20 is The utility model is configured to determine whether the sound source has been displaced according to the position of the sound source and the reference position; and the alarm prompting module 30 is configured to perform an alarm prompt when the sound source is displaced.
  • the monitoring device has a microphone array, and the microphone array is composed of at least two microphones.
  • a microphone array is composed of four microphones, and preferably constitutes a square array, that is, the distance between adjacent two microphones is equal, and four microphones are sequentially connected to form a square.
  • the location acquisition module 10 includes an acquisition unit 11 and a positioning unit 12, wherein: the acquisition unit 11 is configured to collect a sound signal through the microphone array, and detect whether a voice signal is included in the sound signal; and the positioning unit 12 is configured to When the voice signal includes a voice signal, the sound source is positioned by the microphone array to obtain the position of the sound source.
  • the acquisition unit 11 can detect whether a voice signal is included in the sound signal by a voice activity detection algorithm, and the voice activity detection algorithm preferably uses a frequency band variance detection method. Specifically, the collecting unit 11 performs voice endpoint detection. Since the frequency bands of the noise spectrum change relatively gently, and the changes between the voice frequency bands are relatively severe, it is possible to determine whether there is voice activity by calculating the frequency band variance. When the band variance is greater than or equal to the threshold, it is determined that there is voice activity, indicating that the voice signal contains a voice signal; when the band variance is less than the threshold, it is determined that there is no voice activity, indicating that the voice signal does not include the voice signal.
  • the voice signal When it is determined that there is voice activity, the voice signal is included in the voice signal, and the positioning unit 12 performs sound source localization on the voice signal. Specifically, the positioning unit 12 can locate the sound source by using a time delay method. At this time, the positioning unit 12 includes a delay calculation subunit 121 and a position calculation subunit 122, as shown in FIG. 5, wherein: the delay calculation subunit 121, configured to calculate a delay of the sounds emitted by the two microphones in the microphone array, and a position calculation sub-unit 122, configured to calculate a position parameter of the sound source according to the delay and the distance between the two microphones The position parameter determines the position of the sound source.
  • the positional parameter of the sound source includes a polar coordinate of the sound source, and an angle between a projection of the polar axis of the polar coordinate system on the horizontal plane and an X-axis or a Y-axis of the Cartesian coordinate system.
  • the Cartesian coordinate system coincides with the origin of the polar coordinate system, and the polar coordinates include the polar diameter r and the polar angle ⁇ .
  • the microphone array includes four microphones of P1, P2, P3, and P4, and four microphones are sequentially connected to form a square with a side length L, and the sound source is S.
  • a Cartesian coordinate system is constructed based on a square.
  • the Cartesian coordinate system includes x, y, and z axes, and the origin o is in a square.
  • the vertical line is drawn from the sound source S to the xy plane, and the origin o is used as the pole point O.
  • the ray passing through the intersection of the perpendicular line and the xy plane from the pole point O is taken as the X-axis, and the z-axis is taken as the Y-axis, and a polar coordinate system is constructed.
  • OX is the polar axis
  • the angle between OX and OS is the polar angle ⁇
  • the length of the OS is the polar diameter r, that is, the polar coordinate of the sound source S is (r, ⁇ ).
  • the angle between OX and the x-axis or y-axis is thus, the positional parameters r, ⁇ and Then the position of the sound source S is determined. Therefore, just calculate r, ⁇ and The positioning of the sound source S is achieved.
  • the positioning unit 12 can calculate the position parameters r, ⁇ of the sound source S in the following manner.
  • the delay calculation sub-unit 121 calculates the delay of the sounds that the two microphones receive from the sound source:
  • x(n) is the signal received by the microphone
  • s(n) is the signal from the sound source
  • w(n) is the background noise
  • ⁇ is the acoustic propagation attenuation signal (generally 1)
  • ⁇ is the sound source from the sound source
  • R is the autocorrelation function
  • E is the mathematical expectation.
  • the delay calculation sub-unit 121 obtains ⁇ ij at this time, that is, two microphones are calculated.
  • the delay to the sound emitted by the sound source that is, the delay of the sound source reaching the two microphones.
  • the delay calculation sub-unit 121 calculates that the delay of the sound source S reaching the microphones P1 and P2 is ⁇ 21 , the delay of reaching the microphones P1 and P3 is ⁇ 31 , and the delays of reaching the microphones P1 and P4. For ⁇ 41 .
  • r 1 , r 2 , r 3 , and r 4 are distances between the sound source S and the microphones P1, P2, P3, and P4, respectively; r is a distance between the sound source S and the pole point O of the polar coordinate system, that is, a polar diameter; ⁇ is the angle between the polar axis OX and the OS in the polar coordinate system, that is, the polar angle; It is the angle between the polar axis OX of the polar coordinate system and the x-axis or the y-axis in the Cartesian coordinate system; L is the side length of the square formed by the four microphones sequentially connected, C is the sound propagation speed, and x, y, z are The position coordinates of the sound source S in the Cartesian coordinate system. According to formulas (5)-(14), you can get:
  • r is the polar diameter of the polar coordinates and ⁇ is the polar angle of the polar coordinates.
  • the angle between the polar axis OX of the polar coordinate system and the x-axis or the y-axis of the Cartesian coordinate system, ⁇ 41 , ⁇ 31 , ⁇ 21 are the delays of the sounds of the two microphones receiving the sound source, and L is four microphones.
  • the length of the side of the square formed by the sequential connection, and C is the propagation speed of the sound.
  • the position calculation sub-unit 122 can calculate the positional parameters r, ⁇ of the sound source S according to the formulas (15) - (16). Realize the positioning of the sound source S.
  • the analysis judgment module 20 determines whether the sound source has been displaced, that is, whether the position of the sound source has changed.
  • the analysis judging module 20 includes a calculating unit 21, a judging unit 22, and a judging unit 23, wherein: the calculating unit 21 calculates a separation distance between the position of the sound source and the reference position; and the determining unit 22 is configured to compare the separation distance. And determining, by the size of the threshold, whether the separation distance is greater than or equal to the threshold; the determining unit 23 is configured to determine that the sound source is displaced when the separation distance is greater than or equal to the threshold, and determine that the sound source is not displaced when the separation distance is less than the threshold .
  • the threshold and reference position can be set according to actual needs.
  • the reference location may be the location of the sound source obtained by the previous positioning, that is, the analysis determining module 20 compares the current sound source location with the previous sound source location, and determines whether the sound source is generated relative to the previous time. Relative movement.
  • the reference position may also be a preset fixed position, that is, the analysis determining module 20 compares the current sound source position with the preset fixed position each time to determine whether the sound source deviates from the fixed position.
  • the alarm prompting module 30 triggers the sound movement detection alarm to make an alarm prompt. Including direct output of alarm information (such as sounding an alarm, displaying alarm information, etc.), sending alarm information and/or latest sound source position information (ie, current sound source position parameters) to the server, the designated terminal, and the like.
  • alarm information such as sounding an alarm, displaying alarm information, etc.
  • latest sound source position information ie, current sound source position parameters
  • the sound motion detection function of the embodiment of the invention can be used alone or combined with the image motion detection function and the camera function, thereby further improving the reliability of the motion detection and reducing the power consumption of the device.
  • the motion detecting device can further activate the camera, and take a picture and video recording according to the sound source position, turn on the image motion detection function, and send the detection data to the server and/or specify terminal.
  • the motion detecting device of the embodiment of the present invention obtains the position of the sound source by the sound source localization technology based on the microphone array, determines whether the sound source has been displaced according to the position of the sound source and the reference position, and performs when the sound source is displaced.
  • the alarm prompts the motion detection of the target by sound source localization.
  • the sound motion detection scheme of the embodiment of the present invention does not need continuous imaging, thereby greatly reducing power consumption, and the detection accuracy and sensitivity are not affected by ambient light differences. The accuracy of detection is higher, which greatly improves the stability and reliability of monitoring.
  • the invention also proposes a monitoring device comprising a memory, a processor and at least one application stored in the memory and configured to be executed by the processor, the application being configured to perform a Motion detection method.
  • the motion detection method includes the following steps: obtaining a position of a sound source by a sound source localization technology based on a microphone array; determining whether a sound source has been displaced according to a position of the sound source and a reference position; and when the sound source is displaced, performing Alarm prompt.
  • the motion detection method described in this embodiment is the motion detection method in the foregoing embodiment of the present invention, and details are not described herein again.
  • the present invention includes apparatus that is directed to performing one or more of the operations described herein. These devices may be specially designed and manufactured for the required purposes, or may also include known devices in a general purpose computer. These devices have computer programs stored therein that are selectively activated or reconfigured.
  • Such computer programs may be stored in a device (eg, computer) readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus, respectively, including but not limited to any Types of disks (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROM (Read-Only Memory, read-only memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), Flash Memory , magnetic card or light card.
  • a readable medium includes any medium that is stored or transmitted by a device (eg, a computer) in a readable form.
  • each block of the block diagrams and/or block diagrams and/or flow diagrams and combinations of blocks in the block diagrams and/or block diagrams and/or flow diagrams can be implemented by computer program instructions. .
  • these computer program instructions can be implemented by a general purpose computer, a professional computer, or a processor of other programmable data processing methods, such that the processor is executed by a computer or other programmable data processing method.
  • steps, measures, and solutions in the various operations, methods, and processes that have been discussed in the present invention may be alternated, changed, combined, or deleted. Further, other steps, measures, and schemes of the various operations, methods, and processes that have been discussed in the present invention may be alternated, modified, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and solutions in the prior art having various operations, methods, and processes disclosed in the present invention may also be alternated, modified, rearranged, decomposed, combined, or deleted.

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Abstract

L'invention concerne un procédé et un appareil de détection de mouvement, ainsi qu'un dispositif de surveillance. Le procédé comprend les étapes suivantes, consistant : à acquérir la position d'une source sonore au moyen d'une technique de positionnement de source sonore basée sur un réseau de microphones ; en fonction de la position de la source sonore et d'une position de référence, à déterminer si la source sonore a été déplacée ; et lorsque la source sonore a été déplacée, à émettre une invite d'alarme, de façon à détecter le mouvement d'une cible au moyen d'un positionnement de source sonore. Par rapport au procédé de détection de mouvement d'image existant, le procédé de détection de mouvement sonore des modes de réalisation de la présente invention ne nécessite pas de photographie continue, ce qui permet de réduire fortement la consommation d'énergie. De plus, la précision et la sensibilité de détection ne sont pas affectées par une faible lumière ambiante, et par conséquent la précision de la détection est plus élevée, de telle sorte que la stabilité et la fiabilité de surveillance soient considérablement améliorées.
PCT/CN2017/109190 2017-09-30 2017-11-02 Procédé et appareil de détection de mouvement et dispositif de surveillance WO2019061678A1 (fr)

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CN108682064A (zh) * 2018-05-14 2018-10-19 广东汇泰龙科技有限公司 一种基于语音识别和人脸识别的开锁方法及系统
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