摘要:
A flame detection device for detecting a flame caused by a fire, including a light attenuation filter for attenuating 90% or greater of light with wavelengths in a visible to near-infrared band radiated from the flame. The flame detection device further includes an imager for photographing an image of the attenuated light incident thereon, and a processing section for deciding the flame from the image obtained by the imager.
摘要:
A light scattering type smoke sensor comprising a holder with openings embedded with light emitting part and light detecting part respectively, which do not protrude into the smoke detection chamber. The optical axis of light emitting part intersects at a predetermined first angle α in the horizontal direction with the optical axis of the light detecting part at a predetermined second angle β in the vertical direction. The optical axis of the light emitting part and optical axis of the light detecting part further comprise a configuration angle δ in the range of 90˜120 degrees used as the supplementary angle for the scattering angle θ. Accordingly, the smoke detection part is further constituted in a thin-shaped light scattering smoke sensor which enables the setup of a scattering angle with no directivity in the smoke influx to the smoke detection chamber.
摘要:
A fire detection device comprises a detection element to convert the infrared ray energy into the electric signal, a first extracting unit to extract the signal of a first prescribed frequency range including the flicker frequency of a fire from the output signal of the detection element, a second extracting unit to extract the signal of a second prescribed frequency range including no flicker frequency of a fire but including the frequency on the higher frequency side than that of the first prescribed frequency range from the output signal of the detection element, and a judging unit to judge a fire based on the output signal of the first extracting unit and the output signal of the second extracting unit. The fire detection device is capable of surely discriminating and detecting the flame from other infrared ray energy generation source. A band pass filter or the like need not be increased in number, and the increase in the product price can be prevented. In particular, the flame detection device is capable of rapidly judging a fire, and suitable for practical applications.
摘要:
A light emitting diode 1 and a condenser lens 2 are arranged in an optical axis direction. In the light emitting diode 1, a cover 4 having a tip end lens 5 is attached to one side of a main unit base 9, a light emitting chip 6 is supported by a bonding wire 8 drawn out from the body base 9 inside the cover 4, and a reflector 7 is placed behind the light emitting chip 6. With respect to a first light source of the light emitting chip 6, the position where light which is forward reflected by the reflector 7 impinges on the tip end lens 5 is set as a virtual second light source 10, and the focal point of the condenser lens 2 is set at the position of or in the vicinity of the position of the second light source 10.
摘要:
Disclosed herein is a fire alarm system for connecting a plurality of fire sensors to sensor lines, and giving an alarm in response to fire information output from the fire sensor in a line unit. The fire alarm system includes a current modulation section and an address specification section. The current modulation section is used for maintaining a current flowing in the sensor line at a predetermined value for a predetermined time at the time of a fire, and modulating the current in accordance with the inherent address information of the fire sensor. The address specification section is used for sensing fire information by judging whether or not the current has been maintained at the predetermined value for the predetermined time, and also for specifying the inherent address of the fire sensor that issued the fire information, from the modulated state of the current.
摘要:
The alarming 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; a alert section that outputs an anomaly alarm based on the anomaly detection signal; a reception circuit section that receives an event signal from another alarming device; a transmission circuit section that transmits an event signal to the other alarming device; 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 circuit section to transmit an event signal according to the anomaly of the alarming device to the other alarming device, and on the other hand, when the reception circuit section has received an event signal according to an anomaly of the other alarming device from the other alarming device, causes the alert section to output the anomaly alarm; and a communication control section that detects a predetermined event and performs communication control by adjusting the transmitting and receiving of an event signal by the transmission circuit section and the reception circuit section.
摘要:
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.
摘要:
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 transmitted to the source alarm device. In addition, when there are one or more all of the destination alarm devices which have not transmitted an acknowledgement signal to the source alarm device among all of the destination the alarm devices registered in advance, the third and fourth processes are repeated.
摘要:
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.
摘要:
There is provided an apparatus for measuring forces acted upon a tire in which a radial force and a peripheral force acting to the tire, which are required for the high precision measurement of a friction coefficient on a road surface, are simply measured in a high precision by detecting a magnetic field formed by a magnet fixed to a tread portion of the tire by a magnetic sensor fixed to a rim and measuring the forces acting to the tire from a variant pattern of a magnetic flux density detected un the rotation of the tire and without influencing upon the balance of the tire, which contributes to the high precision measurement of the friction coefficient on the road surface.