Abstract: [Problem to be Solved] To provide a scattered light-type smoke detection apparatus in which internally scattered light in a smoke detection space can be suppressed to improve the S/N ratio.

Abstract: [Problem to be Solved] To provide a smoke sensing system, a smoke sensor and a receiver that can accurately determine the type of smoke.

Abstract: The alarm device of the present invention includes a battery power supply; a sensor section that outputs an anomaly detection signal in the case of detecting an anomaly; an alert section that outputs an alarm based on the anomaly detection signal; a reception circuit section that discontinuously receives an event signal from another alarm device at every predetermined reception cycle; a transmission circuit section that transmits an event signal to the other alarm device in a transmission time that is at least the predetermined reception cycle; an anomaly monitoring section that, when the sensor section has detected an anomaly, causes the alert section to output the anomaly alarm based on the anomaly detection signal and causes the transmission of an event signal relating to the anomaly of the alarm device to the other alarm device by the transmission circuit section, and on the other hand, when the reception circuit section has received from the other alarm device an event signal relating to an anomaly of th

Abstract: An alarm comprising: a transmission reception circuit unit transmitting and receiving an event signal with an other alarm; a sensor unit detecting an abnormality; an alerting unit outputting an abnormality warning; an abnormality monitoring unit receiving an abnormality detection signal from the sensor unit, while outputting the abnormality warning of a coordination source, and transmitting to the other alarm the event signal indicating an abnormality, meanwhile, outputting the abnormality warning of a coordination end when the event signal indicating an abnormality is received from the other alarm; and an inspection processing unit transmitting to the other alarm an event signal indicating a self inspection result, and, when an event signal indicating an inspection result is received from the other alarm, reporting an inspection result of a plurality of alarms in coordinated relation.

Abstract: A wide protection range can be ensured by extending the flying distance of fire-extinguishing agent particles electrified and sprayed from a head. A water-based fire-extinguishing agent is pressurized and supplied to an electrification spray head 10 installed in a protection area A via a pipe, the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head 10. The electrification spray head mixes and sprays the fire-extinguishing agent having a comparatively small particle size included in a range from 30 ?m to 200 ?m by a small-particle jetting nozzle 38a and the fire-extinguishing agent having a comparatively-large particle size of 200 ?m to 2000 ?m by a large-particle jetting nozzle 38b, thereby carrying the group of the fire-extinguishing-agent particles having the small particle size by the air current caused by spraying the group of the fire-extinguishing-agent particles having the large particle size.

Abstract: An alarm device includes: a wireless circuit section which wirelessly exchanges event signals with an other alarm device; an alert section which outputs an alarm; an operation section which accepts predetermined operations; a sensor section which issues an abnormal condition detection signal when an abnormal condition occurred is detected within a monitoring area; an abnormal condition monitoring section which, upon receiving the abnormal condition detection signal from the sensor section, outputs an abnormal condition alarm as a linkage source from the alert section, and transmits an event signal indicating an abnormal condition to the other alarm devices, and conversely, upon receiving an event signal indicating an abnormal condition from the other alarm device, outputs an abnormal condition alarm as a linkage destination from the alert section; a communication test transmission processing section which, at a predetermined timing, transmits an event signal indicating a communication test to the other alarm

Abstract: Fire-extinguishing agent supplying equipment pressurizes a water-based fire-extinguishing agent and supplies the agent via a pipe; and the water-based fire-extinguishing agent is pressurized and supplied via the pipe to an electrification spray head installed in a protection area A, and the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head. A pulsed or alternating electrification voltage is applied to the electrification spray head from a voltage application unit 15, and an external electric field generated by applying the voltage between a water-side electrode unit and an induction electrode unit is applied to the fire-extinguishing agent in a jetting process to electrify the jetted particles.

Abstract: An alarm device includes: a wireless circuit section which wirelessly exchanges event signals with an other alarm device; an alert section which outputs an alarm; an operation section which accepts predetermined operations; a sensor section which issues an abnormal condition detection signal when an abnormal condition occurred is detected within a monitoring area; an abnormal condition monitoring section which, upon receiving the abnormal condition detection signal from the sensor section, outputs an abnormal condition alarm as a linkage source from the alert section, and transmits an event signal indicating an abnormal condition to the other alarm devices, and conversely, upon receiving an event signal indicating an abnormal condition from the other alarm device, outputs an abnormal condition alarm as a linkage destination from the alert section; a communication test transmission processing section which, at a predetermined timing, transmits an event signal indicating a communication test to the other alarm

Abstract: A wide protection range can be ensured by extending the flying distance of fire-extinguishing agent particles electrified and sprayed from a head. A water-based fire-extinguishing agent is pressurized and supplied to an electrification spray head 10 installed in a protection area A via a pipe, the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head 10. The electrification spray head mixes and sprays the fire-extinguishing agent having a comparatively small particle size included in a range from 30 ?m to 200 ?m by a small-particle jetting nozzle 38a and the fire-extinguishing agent having a comparatively-large particle size of 200 ?m to 2000 ?m by a large-particle jetting nozzle 38b, thereby carrying the group of the fire-extinguishing-agent particles having the small particle size by the air current caused by spraying the group of the fire-extinguishing-agent particles having the large particle size.

Abstract: A fire distinguishing device includes: a detection device which detects an outbreak of a fire; a fire presence/absence distinguishing device which distinguishes the presence or absence of the fire; and a cumulative time determining device which determines the cumulative time required for distinguishing the presence or absence of the fire, in the fire presence/absence distinguishing device. The cumulative time determining device distinguishes an environment type of an environment where the detection device is installed, or a phenomenon type of a phenomenon being detected by the detection device, and further determines the cumulative time according to the distinguished environment type or phenomenon type.

Abstract: An alarm device includes: a detection device which detects an occurrence of an abnormal condition within a monitoring area; a transmission device which transmits an alarm signal when the detection device detects the abnormal condition; and an output device which, after the transmission device has transmitted the alarm signal, outputs an alarm after a lapse of a predetermined time after the transmission.

Abstract: Fire-extinguishing agent supplying equipment pressurizes a water-based fire-extinguishing agent and supplies the agent via a pipe; and the water-based fire-extinguishing agent is pressurized and supplied via the pipe to an electrification spray head installed in a protection area A, and the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head. A pulsed or alternating electrification voltage is applied to the electrification spray head from a voltage application unit 15, and an external electric field generated by applying the voltage between a water-side electrode unit and an induction electrode unit is applied to the fire-extinguishing agent in a jetting process to electrify the jetted particles.

Abstract: This transmission input circuit is provided with an adjustment processing section which turns ON a switch at an empty timing where transmission current from a slave device is not flowing, to allow a reference current to flow from a constant current circuit to a current detection resistor, generates in the current detection resistor a target adjustment voltage, in which a threshold voltage corresponding to the reference current is added to a load current detection voltage corresponding to the load current, and adjusts a digital value so that a reference voltage output from a digital variable resistor matches with the target adjustment voltage.

Abstract: A wide protection range can be ensured by extending the flying distance of fire-extinguishing agent particles electrified and sprayed from a head. A water-based fire-extinguishing agent is pressurized and supplied to an electrification spray head 10 installed in a protection area A via a pipe, the jetted particles of the fire-extinguishing agent are electrified and sprayed from the electrification spray head 10. The electrification spray head mixes and sprays the fire-extinguishing agent having a comparatively small particle size included in a range from 30 ?M to 200 ?m by a small-particle jetting nozzle 38a and the fire-extinguishing agent having a comparatively-large particle size of 200 ?m to 2000 ?m by a large-particle jetting nozzle 38b, thereby carrying the group of the fire-extinguishing-agent particles having the small particle size by the air current caused by spraying the group of the fire-extinguishing-agent particles having the large particle size.

Abstract: A transmission input circuit of the present invention is provided with: a current detection resistor which receives an input of a line current flowing through a transmission line and generates a line current detection voltage; a constant current circuit which generates a predetermined reference current; a first switch which performs a switching operation at an empty timing where a transmission current is not flowing, to thereby allow the reference current to flow from the constant current circuit to the current detection resistor, and generate a reference voltage, in which a threshold voltage corresponding to the reference current is added to a load current detection voltage corresponding to the load current; a capacitor which is connected to the current detection resistor via the first switch; a second switch which performs a switching operation in synchronization with the first switch to thereby sample-hold the reference voltage generated by the current detection resistor in the capacitor; and a comparator

Abstract: A detector includes a smoke detecting section that includes a light-receiving unit at a position at which the light-receiving unit does not directly receive light emitted by a light-emitting unit in a chamber in which a labyrinth for preventing light from directly entering from the outside and an insect net covering the rim of the labyrinth are provided, the light-receiving unit receiving light scattered by smoke flowing into the chamber. An opening hole is formed open in the surface of the cover receiving hot air current, of the detector. In the cover behind the opening hole, an electrochemical gas sensor is placed to bring gas generated by a fire through the opening hole into contact with an electrolyte solution to detect the gas by an electrode.

Abstract: An alarm device including: a reception circuit section; a transmission circuit section; a sensor section which detects abnormal conditions; an alert section; an alarm registration section which, when a registration send mode is in effect to form a linked group, sends a registration event signal containing the transmission source code, and when set to a registration receive mode, registers the transmission source codes contained in event signals received from the other alarm devices in a memory; an abnormal condition monitoring section; and a transmission power switch control section which, when the registration send mode is initiated by the alarm registration section, reduces the transmission power of the transmission circuit section beyond that of normal operation.

Abstract: The relay method for an alarm system of the present invention includes: a third process in which a reception intensity of the acknowledgement signal is measured when the source alarm device receives the acknowledgement signal, and in which, if there are one or more destination alarm devices that have not transmitted the acknowledgement signal among all of the destination alarm devices registered in advance, a destination alarm device that has the lowest reception intensity of the acknowledgement signal is assigned as a relay destination alarm device; and a fourth process in which an abnormality signal is relay-transmitted from the source alarm device, through the relay destination alarm device, to the destination alarm devices that are interconnected with the relay destination alarm device, and then, from the destination alarm device that has received the abnormality signal, a signal indicating that a sender thereof is the destination alarm device is outputted, and also an acknowledgement signal is transmitte