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EP4576034A1 - Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors - Google Patents

Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors Download PDF

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Publication number
EP4576034A1
EP4576034A1 EP23383377.1A EP23383377A EP4576034A1 EP 4576034 A1 EP4576034 A1 EP 4576034A1 EP 23383377 A EP23383377 A EP 23383377A EP 4576034 A1 EP4576034 A1 EP 4576034A1
Authority
EP
European Patent Office
Prior art keywords
sensor
audio clip
alarm
audio
central unit
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP23383377.1A
Other languages
English (en)
French (fr)
Inventor
Jon Noble Echeverría
César ALFARO
Iván OVEJERO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Verisure SARL
Original Assignee
Verisure SARL
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 Verisure SARL filed Critical Verisure SARL
Priority to EP23383377.1A priority Critical patent/EP4576034A1/de
Priority to PCT/EP2024/088223 priority patent/WO2025133329A1/en
Publication of EP4576034A1 publication Critical patent/EP4576034A1/de
Pending legal-status Critical Current

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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
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range
    • 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
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits

Definitions

  • the invention relates to an alarm sensor for a window or a door, and to a method of operating an alarm sensor of an alarm installation.
  • Alarm installations are used for monitoring premises/buildings and typically provide a means for detecting the presence and/or actions of people at the premises, and reacting to detected events.
  • alarm installations include alarm sensors to detect the opening and closing of doors and windows, movement detectors to monitor spaces for signs of movement, microphones to detect sounds such as breaking glass, and image sensors to capture still or moving images of monitored zones.
  • Such alarm installations may be self-contained, with alarm indicators such as sirens and flashing lights that may be activated in the event of an alarm condition being detected.
  • Such installations typically include a central unit that is coupled to the sensors, detectors, cameras, etc. (“nodes”), and which processes received notifications and determines a response.
  • the central unit is typically linked to the various nodes wirelessly, rather than by wires, since this facilitates installation and provides some safeguards against sensors/detectors effectively being disabled by disconnecting them from the central unit.
  • the nodes of such alarm installations are typically battery rather than mains powered.
  • an alarm installation may include an installation at a premises, domestic or commercial, that is linked to a remote monitoring centre where typically human operators manage the responses required by different alarm and notification types.
  • the central unit at the premises installation typically processes notifications received from the nodes in the installation, and notifies the remote monitoring centre of only some of these, depending upon the settings of the alarm installation and the nature of the detected events.
  • the central unit at the installation is effectively acting as a gateway between the nodes and the remote monitoring centre.
  • a very important issue for every alarm installation is a reduction of false alarms, or a means to distinguish between an incident and a false alarm when an event occurs which triggers one of the nodes.
  • the object of the invention is to provide means for reducing false alarms.
  • the invention provides an alarm sensor for a window or a door, having a microphone and a memory for storing a recorded audio clip within the sensor.
  • the microphone allows capturing audio signals when the alarm sensor is being triggered by the magnetic detector (indicating that the door or window is being opened) or by the shock/movement detector (indicating mechanical impact on the glass, the window or the door).
  • the audio signal provides "context information" which allows an easier distinction between a false alarm and a critical situation.
  • the audio clip can be stored locally in the alarm sensor for processing there, or for transmission to a central unit.
  • the alarm sensor includes a transmitter.
  • the sensor includes a receiver so that an upload signal, a deletion command signal etc. can be received by the alarm sensor.
  • the senor includes a classification device for classifying the audio signal of the audio clip.
  • Classifying the audio signal is advantageous in that only the classification data has to be sent to the central unit in the first place, thereby saving transmission time and battery life. Should there be the need for a user of the alarm installation or an operator at the remote monitoring centre to listen to the entire audio clip, it can be uploaded by the alarm sensor upon receiving a specific request.
  • classification of the audio signal is not performed locally in the alarm sensor but at the central unit which comprises to this a classification device for classifying the audio clip.
  • the central unit more sophisticated classification algorithms requiring more computing power can be used than in the alarm sensors.
  • the invention also provides a method of operating a sensor as defined above in an alarm installation, the alarm installation comprising a central unit, the central unit comprising a receiver, wherein the method comprises the step of sending a request signal to the sensor and the step of the sensor sending, in response to the request signal, information relating to the audio clip.
  • the trigger signal ensures that the audio signal is recorded only if there is "a need" such as suspicious activity which is detected by the alarm sensor or possibly by any other node of the alarm installation (such as a PIR or a camera), thereby increasing the battery lifetime.
  • the alarm sensor sends the entire audio clip so that it is available for a user of the alarm installation or an operator at the remote monitoring centre.
  • the alarm sensor sends the result of the classification process which is advantageous regarding the transmission speed.
  • the invention provides an alarm sensor for a window or a door, having a microphone and a memory for storing a recorded audio clip within the sensor.
  • the sensor may include any one or more of the following features, which are all optional:
  • the sensor may be configured to record the audio clip in response to an event selected from at least one, optionally at least two, optionally all of:
  • the senor may be configured to delete a recorded audio clip in response to an event selected from at least one, optionally both, of:
  • the senor may be configured to transmit the audio clip via a wireless transmitter of the sensor, in response to an upload command received via a wireless receiver of the sensor.
  • the digital processing circuitry is configured to classify the audio clip and to generate a classification result, optionally wherein the processor is operable to classify the audio clip according to one or more of: contains human voices; contains animal noise; contains raised voices; contains sounds of breakage; contains sounds of glass breakage; contains mechanical tampering sounds.
  • the sensor of any preceding aspect may be configured to be surface mounted to a movable or fixed part of a door or a window, optionally independently of a locking mechanism of the door or window.
  • the invention provides an alarm installation comprising at least one sensor, optionally as defined in any one of the preceding aspects, and a central unit, the central unit comprising a wireless transmitter for transmitting a signal to the sensor, and a wireless receiver for receiving a signal from the sensor, the central unit being configured to:
  • the central unit may be configured to transmit to at least a group of said sensors one or more recording command signals for commanding those sensors to record respective audio clips.
  • the central unit may optionally comprise a classification device for classifying the audio clip.
  • a classification device at the central unit may avoid some power consumption constraints compared to implementation at the sensor.
  • the invention provides an alarm installation comprising at least one sensor, the sensor and/or the installation optionally as defined in any of the preceding aspects, the installation having a disarmed state and at least one armed state, wherein:
  • the invention provides a method of operation of a sensor, optionally as defined in any of the preceding aspects, the method comprising the steps of:
  • Step (b) may optionally comprise selectively performing a sub-step from a group of said sub-steps in dependence on a function commanded by the command signal.
  • the invention provides a method of operating a sensor, the sensor and/or the method optionally as defined in any of the preceding aspects, the alarm installation having a disarmed state and at least one armed state, the method comprising:
  • the invention provides a method of operating a sensor, the sensor and/or the method optionally as defined in any of the preceding aspects, the method comprising:
  • step (a) may optionally comprise transmitting a signal for commanding at least a group of said plurality of sensors to record an audio clip.
  • reference numeral 1 designates an example building to be protected with an alarm installation.
  • the building 1 can, for example, be a house, an apartment in the house, or a small business building.
  • the building 1 comprises a door 3 and a plurality of windows 4.
  • an alarm sensor 10 which is part of an alarm installation.
  • the alarm installation is adapted for detecting an unauthorized intrusion or an attempt of unauthorized intrusion.
  • the alarm sensor 10 is mounted on at least one of the movable parts or fixed parts of the door or window, for example, a door leaf or door frame or on a window leaf or a window sash or a window frame.
  • a magnet 12 may be mounted on the other of the movable or fixed parts.
  • the alarm installation comprises a central unit 14 which can communicate (typically via a wireless communication such as power-efficient transceivers in the frequency band between 862 MHz and 870 MHz, or LTE cat M) with each of the alarm sensors 10.
  • central unit 14 comprises a transceiver 16. Dashed lines symbolize the wireless communication.
  • the alarm installation can further comprise at least one camera 18 which also communicates with the central unit 14.
  • the alarm installation may also include other peripherals, for example, a motion detector (e.g. a passive infra-red detector), a keypad, a video-doorbell, and/or an obfuscation cloud generator (e.g. for hindering visibility and thus urging an intruder to leave).
  • the central unit 14 is connected to a remote monitoring centre 20 also via a wireless and/or wired communication means.
  • a remote monitoring centre 20 also via a wireless and/or wired communication means.
  • the term "remote monitoring centre” may include one or more centres manned by human operators responsible for reacting to alarms, and/or one or more data processing centres, whether or not such centres are located on the same site as one another.
  • the central unit 14 may be omitted at the installation, and the or each alarm sensor 10 (and optionally the camera 18) may communicate independently with a remote monitoring centre 20, for example, via cellular wireless data communication, for example, LTE cat M communication.
  • a remote monitoring centre 20 for example, via cellular wireless data communication, for example, LTE cat M communication.
  • the alarm sensor 10 comprises a microcontroller 30, and a power supply 42.
  • the sensor 10 comprises at least one detector for sensing a physical condition that is affected by opening and/or breach of the window or door.
  • the at least one detector may include a magnetic detector 32, and a shock/movement detector 34.
  • the sensor 10 comprises a microphone 36 and a memory 38.
  • the alarm sensor 10 comprises a tamper detector 40.
  • the alarm sensor 10 comprises indicator lights 44 (preferably LEDs), and a wireless transceiver 46 (e.g. comprising a wireless transmitter and/or a wireless receiver).
  • indicator lights 44 preferably LEDs
  • a wireless transceiver 46 e.g. comprising a wireless transmitter and/or a wireless receiver.
  • the microcontroller 30 controls functionality of the alarm sensor 10.
  • the magnetic detector 32 is adapted to generate a signal when its position with respect to the magnet 12 changes, in particular to indicate that the door 3 or the window 4 is being opened.
  • the magnetic detector 32 can comprise a hall sensor, a reed switch, or a magnetometer, e.g. multi-axis (e.g. 3-axis) magnetometer.
  • shock/movement detector 34 is adapted to generate a signal when there is a movement of the door or window, and/or when there are vibrations in the door/window.
  • shock/movement detector 34 can comprises a piezo shock/vibration detector, or an accelerometer.
  • the microphone 36 is adapted to capture audio signals which are then recorded/stored as an audio clip in the memory 38.
  • Memory 36 can in particular be a flash memory.
  • the tamper detector 40 is adapted for detecting an attempt to manipulate, remove or otherwise make the alarm sensor 10 inoperable. It can comprise electric contacts which are arranged so as to change state (for example, be interrupted) when a housing of the alarm sensor 10 is opened or when there is an unauthorized attempt to cut of the power supply of the alarm sensor 10.
  • the power supply 42 comprises a battery or a plurality of batteries which can be replaced when necessary.
  • the indicator lights 44 can provide an indication to the user that the alarm sensor 10 operates properly, e.g. by flashing a green light at specific intervals, or can provide an indication that there is a malfunction, e.g. by flashing a red light at specific intervals.
  • the transceiver 46 provides for bi-directional communication with the central unit 14.
  • the alarm sensor 10 is housed within a case that is configured for surface mounting to the window or door, for example, by adhesive or by one or more fixings, for example, screws.
  • the alarm sensor 10 can be configured for mounting to the window or door independently of a locking mechanism for the window or door. Such an example is distinct from the locking mechanism, which may provide a degree of sensor independence sensitive to intrusion attempts whether or not the intrusion attempts focus on the locking mechanism or other regions of the door or window.
  • the alarm installation and the alarm sensor 10 can be operated as follows: Upon receipt of an audio capture trigger signal (S1; S2; S3), also referred to below as merely a trigger signal, the microphone 36 captures (S4) audio signals for a predetermined period of time. As the lifetime of the power supply 42 is an important aspect of the alarm sensor 10, the audio signals are captured for a short period of time only. As examples, the audio signal is captured for five or ten seconds.
  • the audio signal is stored (S4) as an audio clip in the memory 38.
  • the audio data may be compressed during recording for storage, and/or compressed for uploading.
  • the trigger signal can be of one or more, optionally any, of the following different origins.
  • the trigger signal (S1) originates from the alarm sensor 10.
  • the trigger signal (S1) can be the result of the magnetic detector 32 and/or the shock/movement detector 34 generating a signal which indicates that the door 3 or window 4 is being opened, or can be the result of the shock/movement detector 34 generating a signal which indicates that there is a vibration in the door/window, or that somebody is banging on the door/window.
  • the trigger signal can also be the result of the tamper detector 40 generating a signal which indicates that there is an attempt to tamper with the alarm sensor 10.
  • the trigger signal (S2) originates from the central unit 14.
  • the trigger signal can be sent in response to one of the plurality of alarm sensors 10 sending an alarm signal (S5) (as an indication that there is activity which is at least suspicious), or in response to a signal sent from the camera 18, indicating that there is movement somewhere within the building at a place where movement is not expected.
  • the trigger signal (S3) originates from the remote monitoring centre 20.
  • the trigger signal can be sent by personnel of the remote monitoring centre 20 in a situation in which the personnel notices suspicious activity in the building 1 because of an alarm notification signal (S6) sent from the central unit 14, and commands or requests an audio clip to be recorded by one particular alarm sensor 10 or by a plurality of alarm sensors 10, to provide additional context for helping clarify if there is a false alarm or if there is a true alarm situation.
  • the alarm installation may have, or be set in, a disarmed state, or at least one armed state.
  • the trigger signal is preferably generated only when the alarm installation is in an armed state. This is advantageous in order to reduce the power consumption of the alarm sensors 10 (and thus to increase the lifetime of the batteries) and with respect to privacy laws and occupant privacy.
  • the armed state of the alarm installation can be one of an "armed-away” state (which is the state when no occupants are in the building so that there is a level of maximum protection), and an “armed at home” state (which is the state when occupants are in the building but have defined areas which are unoccupied so that these areas and the perimeter of the building are monitored by the alarm installation).
  • an "armed-away” state potentially each and every of the alarm sensors 10 can be used for recording an audio clip
  • the "armed at home” state only those alarm sensors 10 which are in areas supposedly unoccupied can be used for recording an audio clip.
  • the alarm sensors 10 are authorized to record an audio clip only in an armed state. In a disarmed state, there is no recording of an audio clip.
  • the central unit 14 transmits (S7) the arm state (or changes to the arm state) to the alarm sensors 10.
  • the sensors are authorised to self-record when in an armed state.
  • the alarm sensors 10 behave the same way whether the alarm installation is armed or disarmed, and always transmit basic alarm triggers (S5) to the central unit 14 whether armed or disarmed. However, the alarm sensors 10 will only record audio when the central unit 14 (which knows the arm/disarmed state) authorises or commands (S8) audio recording. This requires a two-way exchange of information between the alarm sensors 10 and the central unit 14 for each trigger event.
  • the sensor 10 is responsive to a command signal (S2) received via the transceiver, to record an audio clip.
  • an audio signal itself is not a trigger, as continuously monitoring and processing audio may consume battery power excessively.
  • a low power trigger is used, which can be a movement signal (S1; S4) detected by the magnetic sensor or by the vibration/movement sensor, or a vibration signal (S1; S4) detected by a piezo shock detector, or a specific recording command signal (S2) sent by the central unit 14.
  • the alarm sensor 10 can upload (S9) it to the central unit 14 automatically (from where it can be sent to the remote monitoring centre 20 either automatically or upon request), or the audio clip can be uploaded to the central unit 14 only if there is a specific command or request (S10) (sent from the central unit 14 or by an operator in the remote monitoring centre 20 where alarms of alarm installations are monitored).
  • S9 specific command or request
  • a user can, in some embodiments, replay the audio clip (either at the central unit 14 directly or remotely via a mobile device) to obtain additional context on the event which triggered the recording of the audio clip and the associated alarm.
  • the audio clip can be analysed in the remote monitoring centre 20 by an operator so that additional context on the alarm is made available to the personnel there, to help verify a true alarm or to help cancel or de-escalate a false alarm.
  • an audio clip is recorded by the alarm sensor 10 which has detected a trigger.
  • a recording command signal (S2; S3) is sent to an alarm sensor 10 which has not (e.g. not yet) detected a trigger, by either the central unit 14 or the remote monitoring centre 20.
  • a recording command signal (S2) can be sent from the central unit 14 automatically in response to some other trigger occurring at the premises and processed by the central unit 14.
  • a recording command signal (S3) can be sent from an operator at the remote monitoring centre 20 in order to make available additional context information.
  • an alarm installation which comprises in the building several audio-equipped window/door alarm sensors 10, and perhaps other sensors (PIR motion detectors, or PIR-cameras).
  • PIR motion detectors or PIR-cameras.
  • the central unit 14 may generate a recording command signal (S2; S3) to command all of the window/door alarm sensors to record an audio clip, even if the individual alarm sensors have not been triggered locally.
  • the audio clip or more precisely the audio signal is classified (S11; S12) by a classification device.
  • Classification can be performed by a classification device incorporated into the microcontroller 30, incorporated into the central unit 14, or provided at the remote monitoring centre 20.
  • the classification device may be implemented by software running on a processor of the sensor 10, or of the central unit 14, or at the monitoring centre.
  • Classification (S11; S12) is performed by a pre-trained machine-learning algorithm.
  • input data is classified by a machine-learning model comprising a convolutional neural network (CNN) to produce a classification result, wherein the input data is based at least in part on an audio signal provided by the microphone 36 of the alarm sensor 10.
  • CNN convolutional neural network
  • the classification result indicates a correspondence of the input data with alarm installation related events such as glass-break, door-break, window-break, dog barking, humans, speaking, shouting, and screaming.
  • classification (S11) is performed by the alarm sensor 10
  • an embodiment of the invention provides that in a first step, not the entire audio clip is sent from the alarm sensor 10 to the central unit 14 but only the classification result data. This saves battery life as sending the classification result data requires less energy than sending the entire audio clip. Further, in view of the limited bandwidth of the transmission between the alarm sensor 10 and the central unit 14, sending classification result data is faster than sending an entire audio clip.
  • Classification result data may be transmitted automatically, or it may be transmitted in response to an upload command (S10).
  • an upload request (S10) is sent to the alarm sensor, and the entire audio clip is sent to the central unit 14 from where it can be sent to the remote monitoring centre 20.
  • An advantage of making available to the personnel in the remote monitoring centre 20 the classification result data is that a decision on the nature of the alarm can be taken faster as compared to a scenario in which a couple of audio clips are being sent which an operator in the remote monitoring station 20 has to listen to, possibly a few times until he/she understands what sound has been recorded. Instead, the operator can either take a decision immediately based on the classification result data (indicating e.g. "glass breaking") or replay only the audio clip which appears to be, based on the classification result data, the most relevant one.
  • the audio clip is preferably deleted at some point (S13), both with a view to memory constraints in the alarm sensor 10 and with a view to data privacy.
  • audio is subject to data privacy considerations. This is potentially even more relevant than camera images as audio capture may be less directional compared to a camera. For example, if a window or door is open, it may record audio from outside the premises.
  • Deletion can be done in response to reception at the sensor 10 of a deletion command signal (S14) or automatically after a predefined time period has lapsed.
  • a deletion command signal (S14) can be sent from the remote monitoring centre 20 or the control unit 14 after an alarm situation has been cleared.
  • the audio clip can be automatically deleted (S14) when enough time has lapsed so that it is clear that the audio clip will no longer be used. Examples of such time periods are 24 hours, 12 hours, or 1-2 hours, 30 minutes, 20 minutes, 10 minutes, or less.
  • the audio clip is automatically deleted after a predetermined time has lapsed, and also in a situation in which the audio clip has been uploaded to the central unit 14.
  • Such automatic-delete ensures, with a view to data privacy, that the audio clip is deleted even if there is no explicit deletion command signal.
  • the clip might be over-written anyway by a subsequent audio clip recording, but using explicit automatic-deletion would ensure that no clip is retained on-device for longer than is justifiable.
  • Deletion of an audio clip can be performed by actual erasure, by over-writing with other data, or by erasing a pointer to the recording in memory, or by destroying an access or encryption key to the recording.
  • communication with the alarm sensor 10 is generally via the central unit 14.
  • communications to and from the remote monitoring centre 20 generally pass via the central unit 14.
  • the central unit 14 of the installation may be omitted.
  • the sensors 10 may communicate independently with the remote monitoring centre. Communications to and from the central unit 14, described above, will then be understood to be with the remote monitoring centre 20.
  • the functionalities represented in the central unit 14 would be merged into the functionalities at the remote monitoring centre 20.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Burglar Alarm Systems (AREA)
EP23383377.1A 2023-12-22 2023-12-22 Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors Pending EP4576034A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23383377.1A EP4576034A1 (de) 2023-12-22 2023-12-22 Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors
PCT/EP2024/088223 WO2025133329A1 (en) 2023-12-22 2024-12-20 Alarm sensor for a window or a door and method of operating an alarm sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23383377.1A EP4576034A1 (de) 2023-12-22 2023-12-22 Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors

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EP4576034A1 true EP4576034A1 (de) 2025-06-25

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EP23383377.1A Pending EP4576034A1 (de) 2023-12-22 2023-12-22 Alarmsensor für ein fenster oder eine tür und verfahren zum betreiben eines alarmsensors

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WO (1) WO2025133329A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100302025A1 (en) * 2009-05-26 2010-12-02 Script Michael H Portable Motion Detector And Alarm System And Method
WO2020187859A1 (en) * 2019-03-21 2020-09-24 Verisure Sàrl Method of operating an alarm system and alarm installation
US20230143806A1 (en) * 2021-11-11 2023-05-11 The Adt Security Corporation Premises monitoring using acoustic models of premises

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100302025A1 (en) * 2009-05-26 2010-12-02 Script Michael H Portable Motion Detector And Alarm System And Method
WO2020187859A1 (en) * 2019-03-21 2020-09-24 Verisure Sàrl Method of operating an alarm system and alarm installation
US20230143806A1 (en) * 2021-11-11 2023-05-11 The Adt Security Corporation Premises monitoring using acoustic models of premises

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WO2025133329A1 (en) 2025-06-26

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