公开(公告)号：US20240078895A1

公开(公告)日：2024-03-07

申请号：US18308002

申请日：2023-04-27

Applicant: Carrier Corporation

Inventor： Maoqing Yang ,  Jialin Zhang ,  Dachuan Wang

IPC: G08B29/14 ,  G02B5/20 ,  G08B17/103

CPC classification number: G08B29/145 ,  G02B5/208 ,  G08B17/103

Abstract: The present application provides an optical filter, and a test assembly and method for a smoke detector. The optical filter comprises: a support; and a screen supported by the support, wherein the screen is composed of wires and mesh holes are defined between the wires, and the screen has a first side and a second side opposite to each other; wherein, the smoke detector comprises a light transmitter and a light receiver arranged in vicinity and an light reflector arranged opposite to the light transmitter and the light receiver, such that light emitted by the light transmitter is reflected to the light receiver via the light reflector; and wherein, during testing, the optical filter is arranged in both the light path from the light transmitter to the light reflector and the light path from the light reflector to the light receiver.

公开(公告)号：US20230290237A1

公开(公告)日：2023-09-14

申请号：US18118811

申请日：2023-03-08

Applicant: HOCHIKI Corporation

Inventor： Keisuke Washizu ,  Manabu Dohi

IPC: G08B17/103

CPC classification number: G08B17/103

Abstract: A detector 100 includes: an outer cover 11; and an indicator that outputs at least information about a test of a disaster prevention apparatus by emitting light, and that is provided in the outer cover 11, wherein when at least a part of the outer cover 11 is covered with a test apparatus in order to perform the test of the detector 100, at least a part of an indication surface of the indicator is exposed to an outside of the test apparatus and the indicator is formed in a side portion of the outer cover 11, the indicator is formed in an edge portion of a front portion of the outer cover 11, and the indicator is a part of a light guide portion 111 that is formed in the outer cover 11, and that guides light from a light emitter.

公开(公告)号：US11694525B2

公开(公告)日：2023-07-04

申请号：US16629832

申请日：2018-07-09

Applicant: CARRIER CORPORATION

Inventor： Matthew J. Buchholz ,  Kenneth J. Mott

IPC: G08B5/38 ,  G08B17/103 ,  G08B17/117 ,  G08B5/36 ,  G08B17/06

CPC classification number: G08B5/38 ,  G08B5/36 ,  G08B17/06 ,  G08B17/103 ,  G08B17/117

Abstract: A life safety device includes a housing and a light transmission device disposed within the housing. A first end of the light transmission device is visible at the exterior of the housing. The life safety device additionally includes a transmitter for generating a light. The transmitter is positioned within the housing adjacent the light transmission device. A receiver measures ambient light around the life safety device. The receiver is positioned within the housing adjacent the light transmission device.

公开(公告)号：US11430313B2

公开(公告)日：2022-08-30

申请号：US17056537

申请日：2018-05-31

Applicant: Autronica Fire & Security AS

Inventor： Ole Martin Pedersen ,  Per Johan Vannebo ,  Hans Jorgen Svendsen

IPC: G08B17/103 ,  G08B17/06

Abstract: Disclosed is a smoke detector comprising: a housing including a base, the base including a planar surface configured for being positioned against and attached to a ceiling, a printed circuit board (PCB) comprising a substantially planar shape with a front surface and an opposing back surface spaced in a thickness direction T, and a plurality of perimeter edges including a bottom edge and an opposing top edge spaced in a height-wise direction H, a first side edge and an opposing second side edge spaced in a transverse direction, wherein the top edge comprises a first projection extending in the height-wise direction away from the top edge, the first projection including a first temperature sensor height-wise spaced from the top edge, and the PCB is mounted to the housing so that the front surface of the PCB is perpendicular to the planar surface of the base.

公开(公告)号：US20220065440A1

公开(公告)日：2022-03-03

申请号：US17414897

申请日：2019-12-18

Applicant: David Frederick Small

Inventor： David Frederick Small

IPC: F21V33/00 ,  F21S9/02 ,  G08B17/103

Abstract: Light fixtures and safety detection systems are provided that enable smoke detection devices to be installed in a manner that is out-of-sight, thus alleviating the need to unsightly smoke detection devices to be installed throughout a building. The safety detection system comprises: an electrical fixture, for installation in a building; and a smoke detection device, for detecting at least smoke in the building. The smoke detection device is integrated with the electrical fixture such that the smoke detection device is concealed when installed.

公开(公告)号：US11250681B2

公开(公告)日：2022-02-15

申请号：US14364080

申请日：2013-02-13

Applicant: Tyco Fire & Security GmbH

Inventor： John Shaw

IPC: G08B17/117 ,  G01N21/64 ,  G01N21/53 ,  G08B17/103 ,  G08B17/107 ,  G01N21/47 ,  G08B17/113

Abstract: A smoke detector comprising an enclosure communicating with an external environment, within the enclosure a light source illuminating a detection volume in a first wavelength band and a light-sensor responding to light from the sensing volume in a second wavelength band. The detector is configured to sense photo-luminescent fire products, particularly polyaromatic compounds, and actuate an alarm when signal levels indicate a dangerous/fire condition is present. The photo-luminescence detector may be combined with optical scatter or other fire detectors to improve discrimination between fires and false alarm sources.

公开(公告)号：US11232704B1

公开(公告)日：2022-01-25

申请号：US17247925

申请日：2020-12-30

Applicant: Donesha Baldwin Gardner

Inventor： Donesha Baldwin Gardner

IPC: G08B29/04 ,  G08B5/36 ,  G08B17/103

Abstract: A smoking detection device with tamper countermeasures is disclosed. A smoking detection circuit includes a smoke and gas sensor is configured to detect a smoking event within an enclosed space of a property, such as a vehicle or a hotel room. Tamper countermeasures prevent a renter from interfering with the detection function of the smoking detection device. The device also includes an event recording element that provides an evidentiary backup in the event of a power failure of the smoking detection device. The event recording element includes a light emitter that is triggered by one or more of smoking detection event and a tamper event. The light emitter exposes a patch of photo sensitive material, that once exposed provides for a visual means of identifying a smoking event or a tamper event during a rental period.

公开(公告)号：US11210916B2

公开(公告)日：2021-12-28

申请号：US16714010

申请日：2019-12-13

Applicant: Fujitsu Limited

Inventor： Lan Ding ,  Zhiming Tan

IPC: G08B17/12 ,  G06T7/194 ,  G06T7/246 ,  G06K9/00 ,  G08B17/103 ,  G06T5/00

Abstract: Embodiments of this disclosure provide a smoke detection method and apparatus. The apparatus includes a processor configured to detect foreground blobs in images of a plurality of frames in a video; determine motion areas of detected foreground blobs; determine a first degree of overlapping of the foreground blobs in images of at least two frames, and/or determine a second degree of overlapping of the foreground blobs and motion areas to which the foreground blobs correspond; determine interfering foreground blobs according to the first degree of overlapping and/or the second degree of overlapping; and extract features from motion areas of remaining foreground blobs with the interfering foreground blobs being removed, and detect smoke according to the features. With the embodiments of this disclosure, accuracy of smoke detection may be increased, and false detection resulted from such interfering objects as water blobs, or light spots, etc., may be avoided.

公开(公告)号：US20210280033A1

公开(公告)日：2021-09-09

申请号：US17088323

申请日：2020-11-03

Applicant: Kidde Technologies, Inc.

Inventor： Elbert Jeyapaul ,  Thambiraj Avudaiappan ,  Scott Kenneth Newlin

IPC: G08B17/103 ,  G08B17/06 ,  G01K11/3206 ,  G02B6/02

Abstract: A system for detecting a fire or overheating event includes a heat detector, an optical fiber, a photodetector, and a processing unit. The pneumatic heat detector includes a sealed chamber sealed with a diaphragm having an initial position, and the optical fiber is in operable communication with the diaphragm. The optical fiber includes an FBG. The optical signal generator is configured to emit an optical signal with into the optical fiber. The photodetector is configured to receive a reflected optical signal from the FBG. The processing unit is configured to correlate the reflection wavelength of the reflected optical signal with a temperature of the heat detector.

公开(公告)号：US20210192912A1

公开(公告)日：2021-06-24

申请号：US16719147

申请日：2019-12-18

Applicant: Texas Instruments Incorporated

Inventor： Narayanan Seetharaman ,  Grant Evan Falkenburg

IPC: G08B17/117 ,  H03K5/156 ,  H01L41/04 ,  H01L41/113 ,  H04L12/40 ,  G08B3/10 ,  G08B17/11 ,  G08B17/103

Abstract: An electronic device includes a driver circuit embodied on an IC chip. The driver circuit includes a threshold voltage selection circuit that is coupled to receive a horn comparator threshold setting and to use the horn comparator threshold setting to provide a horn comparator threshold voltage. The driver circuit also includes a comparator that has a non-inverting input coupled to a first pin and an inverting input coupled to receive the horn comparator threshold voltage.