The present disclosure relates to aspirating smoke detectors (ASD). In an ASD, ambient air is aspirated and is fed to a fire detector unit for determining a signal level. For normal operation, the suction power is set to a nominal airflow value and this is increased from a minimum signal level value in order to shorten the transport time of aspirated smoke through the suction pipe to the fire detector unit. In some embodiments, an interruption signal provided for normal operation is output if the airflow exceeds an upper limit value for a minimum period. Independently thereof, the suction power is increased from the minimum signal level value only to the extent that the airflow does not exceed the upper limit value. Or, regardless thereof, the suction power is increased only for a timespan smaller than the minimum period in which the airflow exceeds the upper limit value.

A fire detection apparatus 1 includes a first light emitting unit 101 that irradiates a detection space located inside or outside the fire detection apparatus 1 with first detection light, a second light emitting unit 102 that irradiates the detection space with second detection light having a different wavelength from a wavelength of the first detection light, a light receiving unit 103 that receives scattered light of the first detection light irradiated from the first light emitting unit 101 due to smoke, outputs a first light receiving signal according to the received scattered light, receives scattered light of the second detection light irradiated from the second light emitting unit 102 with respect to smoke, and outputs a second light receiving signal according to the received scattered light, and an identification unit 107a that identifies a type of smoke present in the detection space on the basis of an output ratio of an output value of the first light receiving signal to an output value of the second light receiving signal output from the light receiving unit 103 and a rising rate of the output value of the first light receiving signal or the second light receiving signal.

Methods and systems for performing a walk test for fire alarm systems using a mobile device are described herein. One fire alarm system, includes a system control panel fixedly positioned within a building for controlling a plurality of fire alarm system devices connected to the panel and positioned within the building, a mobile device wirelessly connected to the control panel, and a fire alarm system control application on the mobile device, wherein the fire alarm control system application gains access to the control panel and, therethrough, the plurality of fire alarm system devices and wherein the fire alarm control system application issues a command to a particular fire alarm system device of the plurality of fire alarm system devices to perform a particular test or maintenance function and the control panel relays the command to the particular fire alarm system device.

Devices, systems, and methods for providing fire events pattern analysis and cross-building data analytics are described herein. One fire system maintenance system, includes a number of fire system detectors, a fire system control panel, and a gateway device all positioned within the facility, the gateway device having instructions to: collect fire system device health data associated with one or more fire or smoke detector devices and to send this fire system device health data to a remote device, the remote device having instructions to: analyze the collected fire system device health data to determine an event type for each device health event recorded in the collected data, predict future device health events, categorize the device health events based on their determined event type, and prioritize the categorized device health events based on the quantity of events categorized in each event type.

A method of operating an aspirating fire detector system (3) including a fire detector (19), a conduit (7) having an inlet and being connected to the fire detector (19), a ventilator (15) configured to draw air through the inlet of the conduit (7) and into the fire detector (19), a pressure sensor (13) configured to sense the pressure of air being that is drawn through the inlet and into the fire detector (19), and a flow meter (17) configured to measure the flow of the air drawn through the inlet and to the fire detector (19).

A chamberless smoke detector includes at least one light emitter and at least one light receiver and a transparent sheet above the at least one light emitter and the at least one light receiver.

The present disclosure relates to aspirating smoke detectors (ASD). In an ASD, ambient air is aspirated and is fed to a fire detector unit for determining a signal level. For normal operation, the suction power is set to a nominal airflow value and this is increased from a minimum signal level value in order to shorten the transport time of aspirated smoke through the suction pipe to the fire detector unit. In some embodiments, an interruption signal provided for normal operation is output if the airflow exceeds an upper limit value for a minimum period. Independently thereof, the suction power is increased from the minimum signal level value only to the extent that the airflow does not exceed the upper limit value. Or, regardless thereof, the suction power is increased only for a timespan smaller than the minimum period in which the airflow exceeds the upper limit value.

Methods, devices, and systems for adjusting for air flow temperature changes in an aspirating smoke detector are described herein. In some examples, one or more embodiments include a blower configured to cause air to flow through the aspirating smoke detector, and a controller configured to determine a temperature of the air flowing through the aspirating smoke detector has changed by a particular amount and adjust a speed of the blower in response to compensate the air flowing through the aspirating smoke detector that has changed by the particular amount.

An aspirating detection system for detecting a fire event in a monitored environment, a method of determining when an aspirator for an aspirating detection system requires maintenance, and a method of calibrating a control module for an aspirating detection system. The aspirating detection system (1) includes an aspirator (2) for sampling air from the monitored environment (100), and a vibration sensor (3) configured to monitor a vibration signature of the aspirator (2). The aspirating detection system (1) may further include a control module (4) in communication with the vibration sensor (3). The control module (4) may be configured to determine if the aspirator (2) requires maintenance based on the vibration signature of the aspirator (2).

A fire detection system (10) includes a plurality of smoke detectors (14) positioned for detection of smoke within one or more smoke detection volumes (12a, 12b). The fire detection system (10) is configured to monitor occupancy of the smoke detection volumes (12a, 12b) or to receive data indicative of occupancy of the smoke detection volumes (12a, 12b), for example from an intrusion detection system (20). The fire detection system (10) is configured to adjust a smoke sensitivity associated with each of the smoke detectors (14) based on the occupancy of the respective smoke detection volume (12a, 12b), with the smoke sensitivity being decreased when the respective smoke detection volume (12a, 12b) is occupied.