公开(公告)号：US20200126400A1

公开(公告)日：2020-04-23

申请号：US16579873

申请日：2019-09-24

Applicant: Axis AB

Inventor： Ingemar LARSSON ,  Anders HANSSON ,  Daniel ANDERSSON

IPC: G08B25/14 ,  G08B25/10 ,  H04W4/029 ,  H04W4/33 ,  H04W4/90

Abstract: The present invention relates to an emergency notification system where indicators are mounted on or in a building in such a way that optical or thermal signals emitted from the indicators form a time-variant indication detectable outside the building of an emergency event taking place inside the building. Sensors detecting a predetermined sound are mounted inside the building and are each connected to a nearby indicator. When a sensor makes a detection, it sends event information to its associated indicator which will prompt the indicator to emit a first optical or thermal signal. Based on a signal from a timer connected to the indicator, a property of the first signal will change after a certain time has passed, thereby providing the time-variant indication.

公开(公告)号：US20230072114A1

公开(公告)日：2023-03-09

申请号：US17940123

申请日：2022-09-08

Applicant: Axis AB

Inventor： Ingemar LARSSON ,  Olle BLOMGREN

IPC: H04W12/06 ,  H04W12/08

Abstract: An access control system and a method performed therein, for handling access to an access-restricted physical resource. The method comprises, by means of a first credential reader, receiving an initiating access request credential initiating a request to give one or more visitors access to a first access-restricted physical resource. The method further comprises, by means of the first credential reader, receiving a visitor credential for each visitor for which access is requested, and, by means of a second credential reader, receiving a finalising access request credential finalising the request to give the one or more visitors access. Furthermore, the method comprises, by means of a first resource controller, allowing a visitor to access the first access-restricted physical resource upon presenting the visitor's visitor credential to the first credential reader.

公开(公告)号：US20210272555A1

公开(公告)日：2021-09-02

申请号：US17182526

申请日：2021-02-23

Applicant: Axis AB

Inventor： Ingemar LARSSON ,  Daniel ANDERSSON

IPC: G10L15/16 ,  G10L25/30 ,  G10L25/51 ,  G06N3/08 ,  G08B23/00

Abstract: A method for training an alarm system to classify audio of an event, wherein the alarm system is connected to a neural network trained to classify audio as an event type, the method comprising the steps of: receiving audio recorded during a first period of time; transmitting the audio to an external unit; receiving data from the external unit indicating a sub-period of time of the audio and data indicating an event type of the indicated sub-period of time of the audio; and re-training the neural network by inputting a sub-period of the audio corresponding to the indicated sub-period of time of the audio and using the indicated event type as a correct classification of the sub-period of the audio.

公开(公告)号：US20210366218A1

公开(公告)日：2021-11-25

申请号：US17231013

申请日：2021-04-15

Applicant: Axis AB

Inventor： Daniel ANDERSSON ,  Ingemar LARSSON

IPC: G07C9/27

Abstract: The present application concerns access control for controlling unlocking of a door (102) at the presentation of credentials (108) at the door. A credentials relay unit (112) and a lock controller (114) are mounted in the vicinity of the door. The credentials relay unit transmits received credentials to a pre-configured, first network address, and in addition transmits a wake-up signal (122) to the lock controller, which upon receipt of the wake-up signal will transmit a request (126) for instructions to a pre-configured, second network address. In response to the request, the lock controller receives unlocking or no-action instructions (128a, 128b), and in case unlocking instructions are received, the lock controller transmits an unlocking signal (132).

公开(公告)号：US20190007665A1

公开(公告)日：2019-01-03

申请号：US16009247

申请日：2018-06-15

Applicant: Axis AB

Inventor： Jonas HJELMSTRÖM ,  Stefan LUNDBERG ,  Ingemar LARSSON

IPC: H04N9/64 ,  H04N5/33 ,  H04N5/225 ,  H04N5/238

Abstract: A method and assembly produce color images of a scene captured by an image sensor exposed to visible light as well as IR radiation. A first image is captured with a first proportion of an iris aperture covered by an IR-cut filter. A first amount of radiation captured in the first image is determined and a second image captured with a second proportion of the iris covered by the IR-cut filter. A second amount of radiation captured in the second image is determined and a proportion of IR radiation is calculated in the scene based on the first amount of light, the second amount of light, the first IR-cut filter proportion, and the second IR-cut filter proportion. An IR contribution is removed from an image by using the calculated proportion of IR radiation.