130 results about "Smoke signal" patented technology

A temperature difference calculator portion detects temperature difference indicating the rate of temperature rise when it receives heat generated by the fire. A correction factor deciding portion decides a correction factor for a smoke signal based on an external temperature and the temperature difference. Finally, a smoke data correction portion corrects smoke data by multiplying the smoke signal detected by a smoke detector and the correction factor.

The invention discloses a working environment detection system. The system comprises a smoke signal collection signal, a feedback calibration circuit and an operational amplifier output circuit; the smoke signal collection circuit adopts a smoke signal collector J1 in the model of LB-70C to collect a plant working environment smoke signal; the feedback calibration circuit is divided into two pathsto receive output signals of the smoke signal collection circuit; in one path, a composite circuit is composed of an inductor L1, a resistor R5 and a capacitor C3 so as to filter high-frequency noisein the signal, and a peak detection circuit is composed of an operational amplifier AR2, the operational amplifier AR4 and a diode D3 and the diode D4 to regulate signal peak value; in the second path, a delay circuit is composed of a triode Q1, a resistor R6 and a capacitor C2 to delay the signal, and the operational amplifier output circuit amplifies the signal through an in-phase manner by applying the operational amplifier AR7, and a pai type filter circuit is composed of the inductor L2, the capacitor C7 and the capacitor C8 to filter and output the signal; the smoke status in the working environment of the plant can be monitored in real time, the signal transmission stability is improved at the same time, and the signal frequency hopping and distortion are prevented.

The invention relates to a smoke detector, and especially relates to a photoelectric smoke sensing detector by utilization of low-power-consumption wireless communication technology and eliminating environment interference. The wireless communication technology and the smoke sensing detection technology are combined, the smoke sensing detector can detect fire behaviors independently, can is communicated with a fire-fighting host, and has a fire-fighting linkage effect. For processing of a smoke signal, an environment base value following pollution processing method is employed, and a false alarm or the like caused by environment interference in a labyrinth is eliminated in time. Housing design employs an electrode contact mode, unnecessary troubles caused by detector removal for man-made reasons during the usage process of the detector can be detected well, a 433MHz wireless communication technology is employed, a wireless radio frequency processing chip with a response mode is employed, bidirectional intercommunication of information can be achieved, and the system power consumption is reduced. A 9V lithium battery is employed, the situation is ensured that the detector can work normally for 6-8 years under a condition that the cell supplies power, and a trouble of replacing a cell is avoided for a user.

The invention is an aerosol search and rescue (SAR) grenade. A smoke signal is produced that is comparable to the smoke signal produced by a pyrotechnic grenade. An aspirating provides a propellant gas/air mixture to a reservoir of smoke material. A container configuration and gravity operated valve provide for a smoke plume only in the upward direction. The smoke grenade is useful in life rafts. It is also useful in inland areas posing a risk of fire.

The invention discloses a speech digital network fire alarm design system based on a single chip, wherein an AT89C51 single chip is used, an integrated temperature sensor AD590 and a gas sensor TGS202 are selected as the sensitive elements, and a speech digital network alarm applicable to the fire alarm of a small institute is developed by using a multi-sensor information fusion technology. The alarm hardware consists of a temperature smoke signal acquisition module, an audible and visual alarm module, the a single chip and a Modem communication module. The sudden change of the indoor smoke (CO2, CO) and temperature can be alarmed (audible and visual alarm); in the case of hardware faults (such as sensor drop, damage of internal device and the like), a fault alarm can be sent; if a parameter is abnormal (for example, the smoke concentration is excessively great or the temperature is excessively high,), an abnormity alarm signal can be sent such that the operator on duty can handle the situation on site; if both the smoke and the temperature are abnormal, a fire disaster happens, a fire alarm is sent, and the fire information is reported to a fire command center. The system is safe and reliable and ensures low rate of false alarm. Moreover, the system has wide application prospect due to the small size, convenient operation and maintenance, low cost, and the like.

The invention discloses an electronic cigarette and an atomization control method thereof. The electronic cigarette includes a atomization assembly and a battery assembly; a heating wire assembly is arranged in the atomization assembly; the battery assembly is internally provided with a power supply which supplies power to the heating wire assembly to allow the atomization assembly to atomize tobacco tar to form smoke; and the electronic cigarette also includes a control module which is electrically connected to the power supply and the heating wire assembly, and an gas flow sensor which is used for detecting user smoke and sending a smoke signal to the control module. The beneficial effects of the electronic cigarette and the atomization control method thereof are that: through contact between conductive sleeves arranged on different positions and skins of a human body, the gas flow sensor is triggered, and then the electronic cigarette is enabled, and in this way, the probability that the electronic cigarette is wrongly triggered can be decreased. During use, the structure can meet a habit that fingers of the user clamp the battery assembly, and a mouth of the user clamps a nozzle to smoke. The electronic cigarette is easy to use for the user, and the user experience can be improved.

The invention relates to a cable line online monitoring circuit, and the system comprises a detection device and a warning device, wherein the detection device is connected with the warning device through the IOT (Internet of Things). The detection device comprises a water level detection sensor which is used for detecting the condition of the level of water in a cable trench and uploading a water level signal; a temperature and humidity detection sensor which is used for detecting the temperature and humidity of a cable joint in the cable trench and uploading a temperature and humidity signal; a cable fault collector which is used for detecting whether the cable joint of the cable in the cable trench has a fault or not and uploading a joint condition signal; a smoke alarm which is used for detecting the smoke condition in the cable trench and uploading a smoke signal; and an intelligent controller which is used for receiving the water level signal, the temperature and humidity signal, the joint condition signal and the smoke signal, combining preset information to obtain a fault signal for judging whether a cable line has a fault or not, and uploading the fault signal to the warning device. The warning device comprises an industrial control computer. The circuit provided by the invention reduces the labor intensity of a worker, improves the operation level of a power grid, and improves the power supply reliability and informationization level.

The invention discloses a device and a method for detecting the oil smoke concentration of a range hood. The device comprises an audio processing module, a range hood control module, a fan driving module and a button and instruction module, wherein the audio processing module comprises an audio acquisition unit and an audio processing unit. According to the device and the method, a cooking sound is acquired and is taken as the basis of oil smoke concentration after being processed by the audio processing module; the processed cooking sound is compared with a reference oil smoke signal in the range hook control module to judge the oil smoke concentration, the rotating speed of a fan can be further controlled, the air suction amount of the range hood is adjusted, and the air amount of the range hood can be automatically controlled; as being not arranged in an oil smoke suction and exhaust channel, a detection element does not be easily wrapped by oil stains to have failure, and thus the device and the method are high in detection accuracy and reliability.

The invention discloses an intelligent comprehensive substation cable trench monitoring and protecting system which comprises a monitoring workstation, a cable trench workstation and a plurality of distributed modules, wherein each distributed module is used for acquiring a state signal of a trench cable; the state signal is input to the cable trench workstation for processing, and the cable trench workstation processes an input signal and transmits the processed signal to the monitoring workstation. The cable trench workstation and the distributed modules are connected to a cable trench environment, and the monitoring workstation enters a monitoring work room. The wireless data communication is stable and smooth, the monitoring workstation can remotely and timely master temperature change conditions of each temperature monitoring point in the cable trench, data are automatically acquired, and the monitoring labor intensity is lightened; and moreover, a water level signal in the environment in which the trench cables are positioned is acquired by employing a water level sensor, and the water level change can be timely and accurately reflected. A smoke signal in the environment in which the trench cables are positioned is acquired by employing a smoke sensor, an alarm signal is timely output, and the intelligent monitoring and protecting can be realized.

The invention discloses a Beidou-positioning based on-board smoke induction broken-windows system which mainly comprises a smoke transducer, a glass check ring, a motor casing, a cushion, a motor, a cam, a taper hammer, a spring, a storage battery, a PCB (printed circuit board), an MCU (microprogrammed control unit), a BDS (Beidou navigation system) module, a BDS (Beidou navigation system) antenna, a relay switch and a circuit. The smoke transducer is installed at the top of an automobile, and the motor casing, the cushion, the motor, the cam, the taper hammer and the spring are installed in the motor casing on the glass check ring; the MCU, the BDS module and the BDS antenna are installed on the PCB. Smoke is produced at the early stage of fire of the automobile, the MCU controls the relay switch to be closed after smoke signals are captured through the smoke transducer, the motor drives the cam to rotate after the motor is powered to start, and automotive glass is constantly shocked through the taper hammer to have the glass smashed; meanwhile, the MCU controls the BDS module to transmit calling-for-help signals to fire and rescue departments.

The invention discloses a safe escape route selecting system and a safe escape route selecting method, and relates to the technical field of wireless sensing. The safe escape route selecting system and the safe escape route selecting method are used for providing safe escape routes for trapped people in a building when special situations such as a fire disaster occur in the building. The safe escape route selecting system comprises a signal acquiring unit and a signal processing unit; the signal acquiring unit is used for acquiring temperature signals and smoke signals of all safety exits; the signal processing unit is used for judging whether the safety exits are the safe escape routes or not according to the temperature signals and the smoke signals of the safety exits; when dangerous situations occur, the signal processing unit is used for directing the trapped people to evacuate according to the safe escape routes. The safe escape route selecting system is used for providing the safe escape routes for the trapped people.

The invention provides a composite smoke and temperature sensing fire detecting device including an air collecting cover, a smoke suction base, a small air suction fan, a pt100 temperature sensor, a connecting base and a lamp socket; the top surface of a detection seat supports a function seat through a supporting rod, the function seat is of a round cavity structure, and a small suction fan is arranged in the inner cavity of the function seat; three air pipes are arranged on the outer side of the small suction fan in a penetrating mode, the air pipes penetrate through the outer side of the function seat to be bent downwards; a mounting table with an annular structure is arranged on the top surface of the function seat, and a bolt hole used for installing the whole device on the ceiling ofthe house is formed in the mounting table; when the smoke rises upwards, the raised smoke can rise to the detector quickly, the receiving of the smoke signals are accelerated, an alarm is quickly sent, the signal early warning speed is increased, and the low-concentration smoke is generated even when the smoke rises upwards, the air suction and gathering effects of the three upward air suction pipes which are uniformly distributed are achieved, the smoke can be rapidly ascended into the sensing base, and the smoke concentration is improved.

The invention discloses an operation environment pre-warning device. The operation environment pre-warning device comprises a smoke signal acquisition circuit, a frequency division push-pull circuit and a filter output circuit, wherein the smoke signal acquisition circuit selects an LB-70C smoke signal acquisition device J1 to acquire smoke signals of factory operation environment; the frequency division push-pull circuit receives the smoke signals in two paths so as to acquire circuit output signals; in one path, an inductor L1, a resistor R7 and a capacitor C4 are utilized to form a composite circuit so as to filter high-frequency noise in the signals; in the other path, a triode Q1, a resistor R8 and a capacitor C2 are utilized to form a delay circuit so as to delay the signals, a triode Q6and a capacitor C3 are utilized to filter low-frequency noise in the signals, and a triode Q4, a triode Q5 and a capacitor C5 are utilized to form a switch circuit so as to detect the signals; andfinally, the filter output circuit utilizes a resistor R19, a resistor R20, a capacitor C6 and a capacitor C7 to form an RC circuit so as to carry out filter and output in sequence. According to theoperation environment pre-warning device, abnormal signals can be sent to a remote control terminal through a signal emitter E1 and an operation environment pre-warning module can be triggered to workand give an alarm.

The invention relates to a device and a method for automatically detecting the light extinction rate of smoke, which belongs to the technical field of fire monitoring, and comprises a smoke signal part and a control circuit part, wherein the smoke signal part comprises a smoke chamber, and reflective plates are arranged in the smoke chamber; a control circuit is arranged in a box body, and an optical path pool and a circulating flue are arranged between the two parts; an optical darkroom is arranged below the box body, and a phototube 1 and a sensor are arranged in the darkroom; a lens is respectively and correspondingly arranged above the phototube 1 and the sensor, and the optical path pool is arranged above the two lenses; a phototube 2 is arranged in the optical path pool corresponding to the sensor, and the reflective plates which are parallel to the optical path pool are arranged above the optical patch pool; and the sensor in the optical darkroom is in output connection with an amplifier circuit and is connected with a signal input and output circuit by a signal processing circuit, and the phototube 1 in the optical darkroom is connected with a phototube driving circuit. The device for detecting the light extinction rate of smoke has simple structure, convenient installation and use, long service life, and is suitable for detection in various fire facilities.

The invention discloses a fire control automatic alarm control system for a metro. The fire control automatic alarm control system comprises a plurality of cameras, a plurality of smoke sensors, a plurality of local alarm controllers and a concentrated alarm controller, wherein the cameras are used for collecting images in a metro station, the smoke sensors are used for collecting smoke signals in the metro station, the local alarm controllers are connected with the cameras and the smoke sensors, the concentrated alarm controller is connected with the local alarm controllers, the output end of the concentrated alarm controller is connected with a voice prompt module, an audible and visual alarm device, a first electromagnetic valve, a second electromagnetic valve, a first relay and a second relay, the voice prompt module is used for prompting a passenger of evacuating, the audible and visual alarm device is used for giving an alarm to the passenger, the first electromagnetic valve is used for opening an automatic spray header for putting out fire, the second electromagnetic valve is used for opening a fire hydrant to spray water, the first relay is used for powering off a descending escalator driving motor to accordingly prevent the passenger from entering the station, the second relay is used for powering on a fire resisting shutter driving motor, and the output end of the concentrated alarm controller is further connected with a displayer. The fire control automatic alarm control system for the metro is high in response speed, the fire can be timely found, the alarm can be timely given, corresponding solutions can be timely taken, and the using effect is good.

The invention relates to a fire alarm system, and belongs to the technical field of Internet of Things. The fire alarm system comprises a plurality of smoke detecting devices, a server and a mobile terminal. When the server in the fire alarm system monitors the abnormality of a smoke signal transmitted by a certain smoke detecting device, the server acquires smoke signals transmitted by the remaining smoke detecting devices in the same area as the current smoke detecting device to determine whether a fire occurs in the current area, so that the false alarm rate is greatly reduced, and the occurrence probability of panic incidents caused by false alarm is reduced; in addition, monitoring information is transmitted to the mobile terminal in real time, so that relevant personnel can detect adanger in time, and the timeliness of fire alarm is ensured.

The invention discloses a production line inspection system for a smart factory. The production line inspection system comprises a walking track, a movable mounting mechanism, a control box, a steel rope lifting mechanism, an angle adjusting mechanism, a terminal smoke sensor, a camera and a terminal temperature sensor. According to the production line inspection system for the smart factory, smoke signals, images and temperature collected by the terminal smoke sensor, the camera and the terminal temperature sensor can be transmitted to the upper computer to be displayed through a WiFi module,and real-time monitoring of the environment along the line in the moving process of a movable monitor is achieved; the heights of the terminal smoke sensor, the camera and the terminal temperature sensor can be adjusted as required by utilizing the mobile mounting mechanism and the steel rope lifting mechanism, so that approaching monitoring is carried out on a suspicious position; and the anglesof the terminal smoke sensor, the camera and the terminal temperature sensor can be adjusted by utilizing the angle adjusting mechanism, so that the monitoring point is accurately measured and shot according to a preset angle.

The invention relates to a fire early warning device which comprises a smoke sensor, an amplifier, an A/D converter, a controller, a short message sending module and a buzzer. The smoke sensor is installed at a fire monitoring spot, connected with the amplifier and used for converting a smoke signal into an electric signal. The amplifier is connected with the A/D converter and used for amplifying the electric signal output by the smoke sensor. The A/D converter is an analog-digital converter circuit and is connected with the controller and used for converting an analog signal outputted by the amplifier into a digital signal and transmitting the digital signal to the controller which is respectively connected with the short message sending module and the buzzer. The short message sending module is a short message wireless sending module and used for sending a warning short message to a designated user mobile phone. The buzzer is an audio warning device. The fire early warning device has the advantages of being capable of effectively warning a fire in advance and facilitating reduction of fire threats in life and production.

A substation smoke alarm system relates to the field of medical apparatuses. The system comprises a smoke alarm device and an intelligent mobile terminal. The smoke alarm device comprises a smoke sensor, a smoke controller, a smoke restorer, a voice alarm, and a light alarm. By setting the smoke restorer and the intelligent mobile terminal, the working condition of the smoke alarm device can be monitored remotely. When the alarm is raised, the smoke restorer sends a smoke signal to the intelligent mobile terminal, and an operator receives the smoke signal through the intelligent mobile terminal and judges whether the alarm is real. If the alarm is false, the intelligent mobile terminal can be operated to make the smoke restorer reset the powered-off external power supply of the smoke alarm device. Thus, there is no need to transfer maintenance personnel to the site for troubleshooting and power-off resetting when there is false alarm. The substation smoke alarm system is used for substation fire detection.

The invention discloses a virtual evaluation method for secondary smoke characteristic of a solid propellant based on a plume field. The method disclosed by the invention comprises the following steps of: I, setting and storing an initial parameter; II, calculating an energy characteristic parameter; III, calculating an engine plume field; and IV, calculating a secondary smoke characteristic value, invoking a pre-established secondary smoke relative humidity calculation model via a data processor, and calculating and acquiring secondary smoke relative humidity RHamb at each position on a spraying tube axis in the engine plume field after combusting the evaluated solid propellant by combining a calculation result of the engine plume field acquired in the step III. The method disclosed by the invention is simple in steps, reasonable in design, convenient to realize and good in using effect and can effectively overcome the defects of large investment of manpower and material resources, long period, great test amount and the like when the smoke signal performance of the solid propellant in the prior art is evaluated.

The invention provides a spraying device for intelligent fire fighting. The spraying device for intelligent fire fighting comprises a water receiving unit, a water storage unit, a first lifting mechanism, a second lifting mechanism, a water spraying mechanism and a control unit; the water receiving unit and the water storage unit are movably connected to the first lifting mechanism and the secondlifting mechanism correspondingly; the water storage unit is positioned on the lower portion of the water receiving unit and communicates with the water receiving unit; the first lifting mechanism andthe second lifting mechanism slide up and down in the height direction of a building wall; the water spraying mechanism is installed on the inner side of the building wall and communicates with the water storage unit; and the control unit is in communication connection with an Internet of Things system, and the control unit is used for detecting smoke signals and controlling the water spraying mechanism to spray water. According to the spraying device, rainwater is fully utilized as fire-fighting water, excessive connecting pipelines do not need to be laid, the construction difficulty is reduced, the fire-fighting rapidity and safety are improved, and the fire-fighting problem of a single household in a high-rise residential building is solved.