CN110570618A - point type air suction type fire detection system and method based on two buses - Google Patents
point type air suction type fire detection system and method based on two buses Download PDFInfo
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- CN110570618A CN110570618A CN201910811693.5A CN201910811693A CN110570618A CN 110570618 A CN110570618 A CN 110570618A CN 201910811693 A CN201910811693 A CN 201910811693A CN 110570618 A CN110570618 A CN 110570618A
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- 238000001514 detection method Methods 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 70
- 238000004891 communication Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 134
- 238000005070 sampling Methods 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 19
- 230000005669 field effect Effects 0.000 claims description 12
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
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- 238000011897 real-time detection Methods 0.000 claims description 3
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- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 13
- 235000019504 cigarettes Nutrition 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
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- 230000003044 adaptive effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
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Abstract
the invention provides a point type air suction type fire detection system and method based on two buses, which comprises the following steps: the device comprises a controller, two buses and N point type inspiration smoke-sensing detectors; the controller receives detection signals of the N point type air suction smoke-sensing detectors through the two buses, each point type air suction smoke-sensing detector judges whether a fire disaster occurs and sends an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire disaster; the two buses are used for supplying power to the whole detection system and communicating with each point type air suction smoke detector; the invention provides a distributed airflow and high-sensitivity detection assembly based on two bus power supply and communication loops, which realizes high-sensitivity fire detection and positioning and realizes early fire early warning detection and fire source positioning in large storage places. By adopting the independent air suction combination mode, the technical problems that the traditional air suction type detection distance is short and the alarm area cannot be positioned during detection are solved according to distribution detection and positioning.
Description
Technical Field
the invention belongs to the technical field of fire detection, and particularly relates to a point type air suction type fire detection system and method based on two buses.
background
The time during which a fire begins to smolder by the fire source to become flaming and generate high heat is critical. There are two possible situations during this time: firstly, the situation is continuously worsened, and then the flame is ignited; or take action to find out the fire source to stop the fire, thereby avoiding the danger, loss and damage caused by the fire.
The development of a fire is divided into four stages: incubation (before combustion), smoke is visible, producing a flame and a high heat stage. More time and opportunities are provided for detecting and controlling the development of fire during the incubation period of smoldering. The air-breathing fire detector is mainly applied to the early stage of fire detection, high-sensitivity smoke particle detection is realized by applying a related photoelectron technology, and each sampling point of the air-breathing fire detector is regarded as a point detector. The longest sample air transit time from the furthest sample point to the detector cannot exceed 120 seconds. The working mode and the structure of the air suction type fire detector mainly adopted in the market at present are that a host (the interior of the host is provided with an air suction component and a detection component) is matched with different sampling pipelines to realize detection; the air sampling type (air suction type) smoke detector has very obvious effect on the very early detection of fire and provides an effective solution for places where certain traditional fire alarm detectors cannot be applied, so that the smoke detector is widely used in places such as clean plants, warehouses (especially overhead warehouses), telecommunication machine rooms, IDC machine rooms and distribution boards.
the tradition formula detection distance of breathing in mainly adopts single pipeline or multi-pipe way scanning to realize that long distance large tracts of land covers and surveys, can't judge the conflagration position when one of them pipeline is reported to the police, and the scanning mode still needs to judge the warning pipeline through the scanning, and the fire alarm position of unable in time detecting location leads to conflagration positioning speed slow, influences the early accurate discovery of conflagration and deals with early.
disclosure of Invention
in order to overcome the defects of the prior art, the invention provides a point type air suction type fire detection system and a point type air suction type fire detection method based on two buses, wherein the point type air suction type fire detection system based on the two buses comprises the following steps: the device comprises a controller, two buses and N point type inspiration smoke-sensing detectors;
the controller is connected with the N point type air suction smoke sensing detectors through two buses respectively;
the controller receives detection signals of the N point type air suction smoke-sensing detectors through the two buses, each point type air suction smoke-sensing detector judges whether a fire disaster occurs and sends an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire disaster;
The two buses are used for supplying power to the whole detection system and communicating with each point type air suction smoke detector;
the two buses are two electric wires, a non-polar connection mode is adopted for wiring, wiring is simple, and communication between the controller and the detector is achieved through the bus communication module. The connection mode is that the controller communicates with the two bus communication modules through a serial port, the two bus communication modules communicate with the two bus terminal modules through two buses and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with the terminal processing single chip microcomputer through level conversion.
the base of the point type air suction smoke detector is connected with the two bus communication modules, the pipeline connecting conversion head is connected with the air suction pipeline, the functions of air flow velocity detection, smoke detection, temperature detection and gas detection are realized, the on-site normal state monitoring data acquired by self-learning is collected and determined, the alarm threshold value adapting to the site is determined, whether the fire alarm condition is met or not is judged, an alarm signal is sent out, and meanwhile, all the detection data are sent to the main controller through the two buses;
the point type inspiration smoke detector has the following processes of self-learning acquired field normal state monitoring data and determining a field alarm threshold value:
the current monitoring data collected every second is C0, and the alarm threshold data B is:
B＝C0+(CA-C0)/X
averaging the calculated alarm threshold value B once every 7 seconds, and determining a final alarm threshold value B' after circularly collecting the set self-learning time, wherein CA is a detection maximum value, and X is an artificially specified alarm level.
point type is inhaled and is felt cigarette detector specifically includes: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow flow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multi-stage filtering assembly and a pipeline connection adapter;
the gas to be tested passes through the multistage filtering component and the pipeline connecting adapter, and is detected by the smoke detection component, the temperature detection component and the gas detection component, the smoke detection component, the temperature detection component and the gas detection component are respectively connected with the detection main control board, the detection main control board is respectively connected with the airflow flow velocity detection component and the low-power-consumption centrifugal air pump, and the low-power-consumption centrifugal air pump is connected with the base and the bus;
The base is connected with the bus: the line connection and level conversion of the fixed detector and the two buses are realized;
the bus connection specifically includes: the circuit comprises a diode D5, a triode Q7, a bidirectional diode D4, a rectifier bridge D3, a fuse F1, a capacitor C12, a capacitor C13, a resistor R35, a resistor R36, a resistor R40 and a resistor R41;
a bus input port 1VIN1 is connected to one end of a bidirectional diode D4 and a 1 st pin of a rectifier bridge D3, a bus input port 2VIN2 is connected to the other end of the bidirectional diode D4 and one end of a fuse F1, the other end of the fuse F1 is connected to a 2 nd pin of a rectifier bridge D3, a 3 rd pin of the rectifier bridge D3 is connected to one end of a resistor R36, a collector of a transistor Q7 and an anode of a diode D5, a 4 th pin of the rectifier bridge D3 is connected to one ends of a capacitor C12 and a capacitor C13, the other end of the resistor R36 is connected to one end of a signal input port EIN and a resistor R40 of the bus, the other end of the resistor R40 is connected to a 4 th pin of the rectifier bridge D3, an emitter of a transistor Q7 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to a 4 th pin of the rectifier bridge D41, a base of the transistor Q41 is connected to one end of the signal input port, and the other end, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and is connected with the cathode of the diode D5;
The low-power consumption centrifugal air pump comprises: the sampling device is used for extracting a gas sample in the sampling pipeline to realize active sampling;
the detection main control and airflow flow velocity detection assembly comprises: the detection master control is used for controlling all the components, and the airflow velocity detection component is used for detecting the sampling airflow velocity of the pipeline and judging whether the pipeline is blocked or damaged;
the smoke detection assembly: the smoke alarm device is used for detecting whether the smoke concentration meets an alarm threshold value;
the smoke detection assembly specifically comprises: the photoelectric detector comprises a first operational amplifier U1A, a second operational amplifier U1B, a light emitting diode D1, a photoelectric sensor D2, a capacitor C1, a capacitor C3, a triode Q2, a triode Q4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a resistor R9;
one end of the resistor R4 is connected with the main control board driving MLED _ P, the other end of the resistor R4 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with a positive potential VCC, the positive potential VCC is respectively connected with the anode of the diode D1 and one end of the capacitor C3, the cathode of the diode D1 is connected with the collector of the triode Q4, the base of the triode Q4 is connected with the emitter of the triode Q2, the emitter of the triode Q4 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with one end of the resistor R9, and the other end of;
The positive potential VCC is connected with one end of a resistor R3, the other end of the resistor R3 is respectively connected with the anode of the photoelectric sensor D2 and the inverting input end of a second operational amplifier U1B, the cathode of the photoelectric sensor D2 is respectively connected with one end of a resistor R7 and the non-inverting input end of a second operational amplifier U1B, the other end of the resistor R7 is connected with the ground, the inverting input end of the second operational amplifier U1B is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the output end of a second operational amplifier U1B, the positive power end B of the second operational amplifier U1 is connected with VCC, the negative power end of the second operational amplifier U1B is connected with the ground, the output end of the second operational amplifier U1B is connected with the non-inverting input end of a first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of a resistor R5, the other end, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power supply end of the first operational amplifier U1A is connected with a positive potential VCC, the negative power supply end of the first operational amplifier U1A is respectively connected with the ground wire and one end of the capacitor C1, and the other end of the capacitor C1 is connected with the positive potential VCC;
the temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value and is also used for temperature compensation conditions of other detection devices;
The temperature detection assembly specifically comprises: a third operational amplifier U3, a capacitor C20, a capacitor C21, a capacitor C23, a capacitor C26, a capacitor C40, a resistor R10, a resistor R11, a resistor R12, a resistor R31, a resistor R63 and a resistor R64;
The positive potential VCC is connected with one end of a resistor R63, the other end of the resistor R63 is respectively connected with one end of a resistor R64 and the non-inverting input end of a third operational amplifier U3, the other end of the resistor R64 is connected with the ground wire, the non-inverting input end of the third operational amplifier U3 is connected with one end of a capacitor C40, the other end of the capacitor C40 is connected with the ground wire, the inverting input end of the third operational amplifier U3 is connected with the output end of a third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point Vrefn is respectively connected with one end of a capacitor C and one end of a capacitor C26, the other end of the capacitor C23 is connected with the positive potential VCC;
the temperature detection point T1 is respectively connected with one end of a resistor R10 and one end of a resistor R11, the other end of the resistor R10 is connected with a reference point VrefN, the other end of the resistor R11 is connected with one end of a capacitor C20, and the other end of the capacitor C20 is connected with a ground wire; the temperature detection point T2 is respectively connected with one end of a resistor R31 and one end of a resistor R12, the other end of the resistor R31 is connected with a reference point VrefN, the other end of the resistor R12 is connected with one end of a capacitor C21, and the other end of the capacitor C21 is connected with a ground wire;
the gas detection assembly: the gas concentration detection device is used for detecting whether the gas concentration meets an alarm threshold value;
the gas detection assembly specifically comprises: a switching tube D1, an integrated operational amplifier U2, a regulator chip U4, a field effect tube Q5, a triode Q6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R26, a resistor R99 and a slide rheostat RT 2;
the other end of the measuring detection voltage AD _ IN _ Q0 is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one ends of a capacitor C10 and a capacitor C11, the other end of the capacitor C11 is connected with the ground wire, the other end of the capacitor C10 is connected with a 2 nd pin of an integrated operational amplifier U2, a 2 nd pin of the integrated operational amplifier U2 is respectively connected with one ends of a resistor R14 and a resistor R15, the other end of the resistor R14 is connected with a 1 st pin of an integrated operational amplifier U2, the other end of the resistor R15 is connected with a source of a field effect tube Q5, a drain of the field effect tube Q63 5 8 is connected with a 1 st pin of the integrated operational amplifier U2, a gate of the field effect tube Q2 is connected with a reset sensor RES _ CON port, a 2 nd pin of the operational amplifier U2 is also connected with one end of a resistor R16, the other end of the resistor R16 is connected, One end of a resistor R20 is connected with the negative end AD _ IN _ SEN of the sensor, the other end of a capacitor C7 is connected with the ground, the other end of a resistor R18 is respectively connected with a resistor R19 and a 3 rd pin of an integrated operational amplifier U2, the other end of a resistor R19 is connected with D16, a 4 th pin of the integrated operational amplifier U2 is connected with the ground, the other end of a resistor R20 is respectively connected with a 5 th pin, a 6 th pin and a 7 th pin of the integrated operational amplifier U2 IN sequence, a 5 th pin, a 6 th pin and a 7 th pin of the integrated operational amplifier U2 are respectively connected with a capacitor C9, a resistor R21, a resistor R22 and one end of a capacitor C8, the other end of the capacitor C9 is respectively connected with the other end of the resistor R21 and the ground, the ground is connected with the other end of a capacitor C8, the other end of the resistor R22 is connected with a positive potential V1.8, and the positive potential V1, One end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R23 are connected, the other ends of the capacitor C5 and the capacitor C6 are respectively connected with a ground wire, a 2 nd pin of an adjuster chip U4 is connected with the ground wire, a 3 rd pin of the adjuster chip U4 is connected with one end of a resistor R99, the other end of the resistor R99 is connected with the ground wire, the other end of the resistor R23 is respectively connected with an AD acquisition port AD _ IN _ TEMP and a collector of a triode Q6, a base of the triode Q6 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with a detection short circuit driving TEMP _ CON, an emitter of the triode Q6 is connected with one end of a sliding rheostat.
Multistage filtering component and tube coupling adapter: is used for connecting a sampling pipeline;
the controller specifically comprises: the system comprises a control panel, a display screen, a main and standby power component, a key input, a two-bus communication connection detection component and a data communication alarm fault signal output;
the control panel is respectively connected with the display screen, the main and standby power components, the key input, the two-bus communication connection detection component and the data communication alarm fault signal output;
the control panel is used for communicating with the two bus point type air suction smoke detector and controlling the whole machine;
The display screen displays information such as alarm faults and the like;
the main and standby electric components are used for providing a stable power supply;
the key input is used for inputting information
the two buses are communicated with the control assembly and are used for communicating a control panel in the bridge controller with the two bus terminal modules;
outputting the data communication alarm fault signal; used for outputting the passive warning trouble signal;
a point type air suction type fire detection method based on two buses is realized by adopting the point type air suction type fire detection system based on the two buses, and comprises the following steps:
step 1: setting airflow flow rate C in an air suction pipeline, smoke particle concentration Y in the air suction pipeline, temperature T and gas Q alarm threshold, starting self-learning the current application environment working condition, and adjusting and setting a response threshold according to actual environment detection parameters;
step 2: the detection main control board drives the air pump to suck air in the detection environment through the air suction pipeline, the airflow flow rate detection assembly detects the airflow rate in the air suction pipeline in real time in the air suction process until the airflow rate in the air suction pipeline reaches the set airflow flow rate in the air suction pipeline, and step 3 is executed;
and step 3: the N point type air suction smoke detector detects the smoke particle concentration, the temperature and the gas concentration in the gas flowing out of each sampling hole in real time and transmits the smoke particle concentration, the temperature and the gas concentration to the detection main control board;
and 4, step 4: the detection main control board judges whether the current smoke particle concentration is smaller than a smoke particle concentration alarm threshold value: if yes, recording and executing the step 5, otherwise, recording and executing the step 8;
And 5: the detection main control board judges whether the current temperature is less than a temperature alarm threshold value: if yes, recording and executing the step 6, otherwise, recording and executing the step 8;
step 6: the detection main control board judges whether the current gas concentration is less than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise, recording and executing the step 8;
and 7: smoke particle concentration Y, temperature T and gas Q real-time detection values, YA、TA、QAWeighted average and YT、TT、QTwhether the variation trend value parameter accords with the early warning condition or not is judged, if so, the step 8 is executed, otherwise, the step 3 is returned;
and 8: alarming and communicating with the controller, determining the position of a sampling point, displaying the fire alarm area corresponding to the detection environment area corresponding to the sampling point, and finally returning to the step 3 for re-detection.
the invention has the beneficial technical effects that:
The invention provides a power supply and communication loop based on a large current two-bus, a distributed airflow and high-sensitivity detection assembly, high-sensitivity fire detection and positioning are realized, and early fire early warning detection and fire source positioning in a large storage place are realized through distributed intelligence. By adopting the independent air suction combination mode, the technical problems that the traditional air suction type detection distance is short and the alarm area cannot be positioned during detection are solved according to distribution detection and positioning.
Drawings
FIG. 1 is a schematic block diagram of a two bus based spot suction type fire detection system according to an embodiment of the present invention;
FIG. 2 is an overall block diagram of an aspirated smoke detector according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the connection relationship of control boards according to the embodiment of the present invention;
FIG. 4 is a flow chart of a two-bus based spot suction type fire detection method according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a smoke detection assembly in accordance with an embodiment of the present invention;
FIG. 6 is a circuit diagram of a temperature sensing assembly according to an embodiment of the present invention;
FIG. 7 is a circuit diagram of a gas detection assembly in accordance with an embodiment of the present invention;
FIG. 8 is a circuit diagram of a base and bus connection according to an embodiment of the present invention;
FIG. 9 is a circuit diagram of a probing master control board according to an embodiment of the present invention;
FIG. 10 is a circuit diagram of a detection main control board reset circuit according to an embodiment of the present invention;
FIG. 11 is a circuit diagram of a detecting master control board according to an embodiment of the present invention;
FIG. 12 is a circuit diagram of a detection motherboard download port according to an embodiment of the present invention;
FIG. 13 is a diagram of a detection motherboard memory circuit according to an embodiment of the present invention;
FIG. 14 is a circuit diagram of a power supply circuit of a detection motherboard according to an embodiment of the present invention;
in the figure: 1-sampling hole, 2-point type inspiration detection component.
Detailed Description
Referring to the drawings and the detailed description, the invention will be further explained, and a two-bus based point-type air-breathing fire detection system and a method thereof are shown in fig. 1, and the two-bus based point-type air-breathing fire detection system comprises: the device comprises a controller, two buses and N point type inspiration smoke-sensing detectors;
the controller is connected with the N point type air suction smoke sensing detectors through two buses respectively;
the controller receives detection signals of the N point type air suction smoke-sensing detectors through the two buses, each point type air suction smoke-sensing detector judges whether a fire disaster occurs and sends an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire disaster;
the two buses are used for supplying power to the whole detection system and communicating with each point type air suction smoke detector;
the two buses are 2 lines, wiring is carried out in a non-polar connection mode, wiring is simple, and communication between the controller and the detector is achieved through the bus communication module. The connection mode is that the controller communicates with the two bus communication modules through a serial port, the two bus communication modules communicate with the two bus terminal modules through two buses and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with the terminal processing single chip microcomputer through level conversion. A bus communication module model SYPB620 and a terminal module model SYPB 331.
as shown in fig. 2, the point type air suction smoke detector is characterized in that a base is connected with two bus communication modules, a pipeline connection conversion head is connected with an air suction pipeline, functions of air flow velocity detection, smoke detection, temperature detection and gas detection are achieved, on-site normal state monitoring data obtained by self-learning are collected and determined, an on-site adaptive alarm threshold value is determined, whether fire alarm conditions are met or not is judged, an alarm signal is sent out, and all detection data are sent to a main controller through two buses;
the point type inspiration smoke detector has the following processes of self-learning acquired field normal state monitoring data and determining a field alarm threshold value:
the current monitoring data collected every second is C0, and the alarm threshold data B is:
B＝C0+(CA-C0)/X
averaging the calculated alarm threshold value B once every 7 seconds, and determining a final alarm threshold value B' after circularly collecting the set self-learning time, wherein CA is a detection maximum value, and X is an artificially specified alarm level.
point type is inhaled and is felt cigarette detector specifically includes: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow flow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multi-stage filtering assembly and a pipeline connection adapter;
the gas to be tested passes through the multistage filtering component and the pipeline connecting adapter, and is detected by the smoke detection component, the temperature detection component and the gas detection component, the smoke detection component, the temperature detection component and the gas detection component are respectively connected with the detection main control board, the detection main control board is respectively connected with the airflow flow velocity detection component and the low-power-consumption centrifugal air pump, and the low-power-consumption centrifugal air pump is connected with the base and the bus;
The base is connected with the bus: the line connection and level conversion of the fixed detector and the two buses are realized;
the bus connection, as shown in fig. 8, specifically includes: the circuit comprises a diode D5, a triode Q7, a bidirectional diode D4, a rectifier bridge D3, a fuse F1, a capacitor C12, a capacitor C13, a resistor R35, a resistor R36, a resistor R40 and a resistor R41;
a bus input port 1VIN1 is connected to one end of a bidirectional diode D4 and a 1 st pin of a rectifier bridge D3, a bus input port 2VIN2 is connected to the other end of the bidirectional diode D4 and one end of a fuse F1, the other end of the fuse F1 is connected to a 2 nd pin of a rectifier bridge D3, a 3 rd pin of the rectifier bridge D3 is connected to one end of a resistor R36, a collector of a transistor Q7 and an anode of a diode D5, a 4 th pin of the rectifier bridge D3 is connected to one ends of a capacitor C12 and a capacitor C13, the other end of the resistor R36 is connected to one end of a signal input port EIN and a resistor R40 of the bus, the other end of the resistor R40 is connected to a 4 th pin of the rectifier bridge D3, an emitter of a transistor Q7 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to a 4 th pin of the rectifier bridge D41, a base of the transistor Q41 is connected to one end of the signal input port, and the other end, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and is connected with the cathode of the diode D5;
the low-power consumption centrifugal air pump comprises: the sampling device is used for extracting a gas sample in the sampling pipeline to realize active sampling;
The detection main control and airflow flow velocity detection assembly comprises: the detection master control is used for controlling all the components, and the airflow velocity detection component is used for detecting the sampling airflow velocity of the pipeline and judging whether the pipeline is blocked or damaged;
the smoke detection assembly: the smoke alarm device is used for detecting whether the smoke concentration meets an alarm threshold value;
fig. 5 is a smoke detection photo circuit, smoke being detected by the D2 photo tube in fig. 5.
as shown in fig. 5, the smoke detection assembly specifically includes: the photoelectric detector comprises a first operational amplifier U1A, a second operational amplifier U1B, a light emitting diode D1, a photoelectric sensor D2, a capacitor C1, a capacitor C3, a triode Q2, a triode Q4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a resistor R9;
One end of the resistor R4 is connected with the main control board driving MLED _ P, the other end of the resistor R4 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with a positive potential VCC, the positive potential VCC is respectively connected with the anode of the diode D1 and one end of the capacitor C3, the cathode of the diode D1 is connected with the collector of the triode Q4, the base of the triode Q4 is connected with the emitter of the triode Q2, the emitter of the triode Q4 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with one end of the resistor R9, and the other end of;
the positive potential VCC is connected with one end of a resistor R3, the other end of the resistor R3 is respectively connected with the anode of the photoelectric sensor D2 and the inverting input end of a second operational amplifier U1B, the cathode of the photoelectric sensor D2 is respectively connected with one end of a resistor R7 and the non-inverting input end of a second operational amplifier U1B, the other end of the resistor R7 is connected with the ground, the inverting input end of the second operational amplifier U1B is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the output end of a second operational amplifier U1B, the positive power end B of the second operational amplifier U1 is connected with VCC, the negative power end of the second operational amplifier U1B is connected with the ground, the output end of the second operational amplifier U1B is connected with the non-inverting input end of a first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of a resistor R5, the other end, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power supply end of the first operational amplifier U1A is connected with a positive potential VCC, the negative power supply end of the first operational amplifier U1A is respectively connected with the ground wire and one end of the capacitor C1, and the other end of the capacitor C1 is connected with the positive potential VCC;
the temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value and is also used for temperature compensation conditions of other detection devices;
as shown in fig. 6, the temperature detection assembly specifically includes: a third operational amplifier U3, a capacitor C20, a capacitor C21, a capacitor C23, a capacitor C26, a capacitor C40, a resistor R10, a resistor R11, a resistor R12, a resistor R31, a resistor R63 and a resistor R64;
the positive potential VCC is connected with one end of a resistor R63, the other end of the resistor R63 is respectively connected with one end of a resistor R64 and the non-inverting input end of a third operational amplifier U3, the other end of the resistor R64 is connected with the ground wire, the non-inverting input end of the third operational amplifier U3 is connected with one end of a capacitor C40, the other end of the capacitor C40 is connected with the ground wire, the inverting input end of the third operational amplifier U3 is connected with the output end of a third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point Vrefn is respectively connected with one end of a capacitor C and one end of a capacitor C26, the other end of the capacitor C23 is connected with the positive potential VCC;
the temperature detection point T1 is respectively connected with one end of a resistor R10 and one end of a resistor R11, the other end of the resistor R10 is connected with a reference point VrefN, the other end of the resistor R11 is connected with one end of a capacitor C20, and the other end of the capacitor C20 is connected with a ground wire; the temperature detection point T2 is respectively connected with one end of a resistor R31 and one end of a resistor R12, the other end of the resistor R31 is connected with a reference point VrefN, the other end of the resistor R12 is connected with one end of a capacitor C21, and the other end of the capacitor C21 is connected with a ground wire;
The gas detection assembly: the gas concentration detection device is used for detecting whether the gas concentration meets an alarm threshold value;
as shown in fig. 7, the gas detection assembly specifically includes: a switching tube D1, an integrated operational amplifier U2, a regulator chip U4, a field effect tube Q5, a triode Q6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R26, a resistor R99 and a slide rheostat RT 2;
the other end of the measuring detection voltage AD _ IN _ Q0 is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one ends of a capacitor C10 and a capacitor C11, the other end of the capacitor C11 is connected with the ground wire, the other end of the capacitor C10 is connected with a 2 nd pin of an integrated operational amplifier U2, a 2 nd pin of the integrated operational amplifier U2 is respectively connected with one ends of a resistor R14 and a resistor R15, the other end of the resistor R14 is connected with a 1 st pin of an integrated operational amplifier U2, the other end of the resistor R15 is connected with a source of a field effect tube Q5, a drain of the field effect tube Q63 5 8 is connected with a 1 st pin of the integrated operational amplifier U2, a gate of the field effect tube Q2 is connected with a reset sensor RES _ CON port, a 2 nd pin of the operational amplifier U2 is also connected with one end of a resistor R16, the other end of the resistor R16 is connected, One end of a resistor R20 is connected with the negative end AD _ IN _ SEN of the sensor, the other end of a capacitor C7 is connected with the ground, the other end of a resistor R18 is respectively connected with a resistor R19 and a 3 rd pin of an integrated operational amplifier U2, the other end of a resistor R19 is connected with D16, a 4 th pin of the integrated operational amplifier U2 is connected with the ground, the other end of a resistor R20 is respectively connected with a 5 th pin, a 6 th pin and a 7 th pin of the integrated operational amplifier U2 IN sequence, a 5 th pin, a 6 th pin and a 7 th pin of the integrated operational amplifier U2 are respectively connected with a capacitor C9, a resistor R21, a resistor R22 and one end of a capacitor C8, the other end of the capacitor C9 is respectively connected with the other end of the resistor R21 and the ground, the ground is connected with the other end of a capacitor C8, the other end of the resistor R22 is connected with a positive potential V1.8, and the positive potential V1, One end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R23 are connected, the other ends of the capacitor C5 and the capacitor C6 are respectively connected with a ground wire, a 2 nd pin of an adjuster chip U4 is connected with the ground wire, a 3 rd pin of the adjuster chip U4 is connected with one end of a resistor R99, the other end of the resistor R99 is connected with the ground wire, the other end of the resistor R23 is respectively connected with an AD acquisition port AD _ IN _ TEMP and a collector of a triode Q6, a base of the triode Q6 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with a detection short circuit driving TEMP _ CON, an emitter of the triode Q6 is connected with one end of a sliding rheostat.
Multistage filtering component and tube coupling adapter: is used for connecting a sampling pipeline;
the controller specifically comprises: the system comprises a control panel, a display screen, a main and standby power component, a key input, a two-bus communication connection detection component and a data communication alarm fault signal output;
the control panel is respectively connected with the display screen, the main and standby power components, the key input, the two-bus communication connection detection component and the data communication alarm fault signal output; as shown in fig. 3;
the control board, as shown in fig. 9, fig. 10, fig. 11, fig. 12, fig. 13 and fig. 14, is used for communicating with the two-bus point type inhalation smoke detector and controlling the whole machine;
The display screen displays information such as alarm faults and the like;
the main and standby electric components are used for providing a stable power supply;
the key input is used for inputting information
the two buses are communicated with the control assembly and are used for communicating a control panel in the bridge controller with the two bus terminal modules;
outputting the data communication alarm fault signal; used for outputting the passive warning trouble signal;
a point type air suction type fire detection method based on two buses is realized by adopting the point type air suction type fire detection system based on two buses, as shown in figure 4, and comprises the following steps:
step 1: setting airflow flow rate C in an air suction pipeline, smoke particle concentration Y in the air suction pipeline, temperature T and gas Q alarm threshold, starting self-learning the current application environment working condition, and adjusting and setting a response threshold according to actual environment detection parameters;
step 2: the detection main control board drives the air pump to suck air in the detection environment through the air suction pipeline, the airflow flow rate detection assembly detects the airflow rate in the air suction pipeline in real time in the air suction process until the airflow rate in the air suction pipeline reaches the set airflow flow rate in the air suction pipeline, and step 3 is executed;
and step 3: the N point type air suction smoke detector detects the smoke particle concentration, the temperature and the gas concentration in the gas flowing out of each sampling hole in real time and transmits the smoke particle concentration, the temperature and the gas concentration to the detection main control board;
And 4, step 4: the detection main control board judges whether the current smoke particle concentration is smaller than a smoke particle concentration alarm threshold value: if yes, recording and executing the step 5, otherwise, recording and executing the step 8;
and 5: the detection main control board judges whether the current temperature is less than a temperature alarm threshold value: if yes, recording and executing the step 6, otherwise, recording and executing the step 8;
step 6: the detection main control board judges whether the current gas concentration is less than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise, recording and executing the step 8;
And 7: smoke particle concentration Y, temperature T and gas Q real-time detection values, YA、TA、QAWeighted average and YT、TT、QTwhether the variation trend value parameter accords with the early warning condition or not is judged, if so, the step 8 is executed, otherwise, the step 3 is returned;
and 8: alarming and communicating with the controller, determining the position of a sampling point, displaying the fire alarm area corresponding to the detection environment area corresponding to the sampling point, and finally returning to the step 3 for re-detection.
Claims (9)
1. A two-bus based point-type suction fire detection system, comprising: the device comprises a controller, two buses and N point type inspiration smoke-sensing detectors;
the controller is connected with the N point type air suction smoke sensing detectors through two buses respectively;
the controller receives detection signals of the N point type air suction smoke-sensing detectors through the two buses, each point type air suction smoke-sensing detector judges whether a fire disaster occurs and sends an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire disaster;
the two buses are used for supplying power to the whole detection system and communicating with each point type air suction smoke detector;
the two buses are two electric wires and are wired in a non-polar connection mode, the communication between the controller and the detector is realized by adopting the bus communication module, the connection mode is that the controller is communicated with the two bus communication modules through a serial port, the two bus communication modules are communicated with the two bus terminal modules through the two buses and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with the terminal processing single chip microcomputer through level conversion;
the base of the point type air suction smoke detector is connected with the two bus communication modules, the pipeline connection conversion head is connected with the air suction pipeline, the functions of air flow velocity detection, smoke detection, temperature detection and gas detection are achieved, on-site normal state monitoring data obtained through self-learning are collected and determined, on-site alarm threshold values are determined, whether fire alarm conditions are met or not is judged, alarm signals are sent out, and meanwhile all detection data are sent to the main controller through the two buses.
2. the two-bus based point type air-breathing fire detection system according to claim 1, wherein the point type air-breathing smoke detector self-learns the acquired field normal state monitoring data and determines the field alarm threshold value as follows:
The current monitoring data collected every second is C0, and the alarm threshold data B is:
B＝C0+(CA-C0)/X
averaging the calculated alarm threshold value B once every 7 seconds, and determining a final alarm threshold value B' after circularly collecting the set self-learning time, wherein CA is a detection maximum value, and X is an artificially specified alarm level.
3. the two-bus based point-suction type fire detection system according to claim 1, wherein the point-suction type smoke detector comprises: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow flow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multi-stage filtering assembly and a pipeline connection adapter;
the gas to be tested passes through the multistage filtering component and the pipeline connecting adapter, and is detected by the smoke detection component, the temperature detection component and the gas detection component, the smoke detection component, the temperature detection component and the gas detection component are respectively connected with the detection main control board, the detection main control board is respectively connected with the airflow flow velocity detection component and the low-power-consumption centrifugal air pump, and the low-power-consumption centrifugal air pump is connected with the base and the bus;
The base is connected with the bus: the line connection and level conversion of the fixed detector and the two buses are realized;
the low-power consumption centrifugal air pump comprises: the sampling device is used for extracting a gas sample in the sampling pipeline to realize active sampling;
The detection main control and airflow flow velocity detection assembly comprises: the detection master control is used for controlling all the components, and the airflow velocity detection component is used for detecting the sampling airflow velocity of the pipeline and judging whether the pipeline is blocked or damaged;
The smoke detection assembly: the smoke alarm device is used for detecting whether the smoke concentration meets an alarm threshold value;
the temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value and is also used for temperature compensation conditions of other detection devices;
The gas detection assembly: the gas concentration detection device is used for detecting whether the gas concentration meets an alarm threshold value;
multistage filtering component and tube coupling adapter: is used for connecting a sampling pipeline;
The controller specifically comprises: control panel, display screen, main and standby electricity subassembly, button input, two bus communication connection detection subassembly, data communication warning fault signal output.
4. the two-bus-based point type air suction type fire detection system as claimed in claim 2, wherein in the controller, a control panel is respectively connected with a display screen, a main and standby electric component, a key input, a two-bus communication connection detection component and a data communication alarm fault signal output;
the control panel is used for communicating with the two bus point type air suction smoke detector and controlling the whole machine;
the display screen displays information such as alarm faults and the like;
the main and standby electric components are used for providing a stable power supply;
The key input is used for inputting information
the two buses are communicated with the control assembly and are used for communicating a control panel in the bridge controller with the two bus terminal modules;
Outputting the data communication alarm fault signal; used for outputting passive alarm fault signals.
5. The two-bus based point suction type fire detection system according to claim 2, wherein the bus connection comprises: the circuit comprises a diode D5, a triode Q7, a bidirectional diode D4, a rectifier bridge D3, a fuse F1, a capacitor C12, a capacitor C13, a resistor R35, a resistor R36, a resistor R40 and a resistor R41;
a bus input port 1VIN1 is connected to one end of a bidirectional diode D4 and a 1 st pin of a rectifier bridge D3, a bus input port 2VIN2 is connected to the other end of the bidirectional diode D4 and one end of a fuse F1, the other end of the fuse F1 is connected to a 2 nd pin of a rectifier bridge D3, a 3 rd pin of the rectifier bridge D3 is connected to one end of a resistor R36, a collector of a transistor Q7 and an anode of a diode D5, a 4 th pin of the rectifier bridge D3 is connected to one ends of a capacitor C12 and a capacitor C13, the other end of a resistor R36 is connected to one end of a signal input port EIN and a resistor R40 of the bus, the other end of the resistor R40 is connected to a 4 th pin of the rectifier bridge D3, an emitter of a transistor Q7 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to a 4 th pin of the rectifier bridge D41, a base of the transistor Q41 is connected to one end of the signal input port, and the other end, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and is connected with the cathode of the diode D5.
6. The two-bus based point-suction fire detection system according to claim 2, wherein the smoke detection assembly comprises: the photoelectric detector comprises a first operational amplifier U1A, a second operational amplifier U1B, a light emitting diode D1, a photoelectric sensor D2, a capacitor C1, a capacitor C3, a triode Q2, a triode Q4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a resistor R9;
One end of the resistor R4 is connected with the main control board driving MLED _ P, the other end of the resistor R4 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with a positive potential VCC, the positive potential VCC is respectively connected with the anode of the diode D1 and one end of the capacitor C3, the cathode of the diode D1 is connected with the collector of the triode Q4, the base of the triode Q4 is connected with the emitter of the triode Q2, the emitter of the triode Q4 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with one end of the resistor R9, and the other end of;
the positive potential VCC is connected with one end of a resistor R3, the other end of the resistor R3 is respectively connected with the anode of the photoelectric sensor D2 and the inverting input end of a second operational amplifier U1B, the cathode of the photoelectric sensor D2 is respectively connected with one end of a resistor R7 and the non-inverting input end of a second operational amplifier U1B, the other end of the resistor R7 is connected with the ground, the inverting input end of the second operational amplifier U1B is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the output end of a second operational amplifier U1B, the positive power end B of the second operational amplifier U1 is connected with VCC, the negative power end of the second operational amplifier U1B is connected with the ground, the output end of the second operational amplifier U1B is connected with the non-inverting input end of a first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of a resistor R5, the other end, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power supply end of the first operational amplifier U1A is connected with the positive potential VCC, the negative power supply end of the first operational amplifier U1A is respectively connected with the ground wire and one end of the capacitor C1, and the other end of the capacitor C1 is connected with the positive potential VCC.
7. the two-bus based point suction type fire detection system according to claim 2, wherein the temperature detection module comprises: a third operational amplifier U3, a capacitor C20, a capacitor C21, a capacitor C23, a capacitor C26, a capacitor C40, a resistor R10, a resistor R11, a resistor R12, a resistor R31, a resistor R63 and a resistor R64;
the positive potential VCC is connected with one end of a resistor R63, the other end of the resistor R63 is respectively connected with one end of a resistor R64 and the non-inverting input end of a third operational amplifier U3, the other end of the resistor R64 is connected with the ground wire, the non-inverting input end of the third operational amplifier U3 is connected with one end of a capacitor C40, the other end of the capacitor C40 is connected with the ground wire, the inverting input end of the third operational amplifier U3 is connected with the output end of a third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point Vrefn is respectively connected with one end of a capacitor C and one end of a capacitor C26, the other end of the capacitor C23 is connected with the positive potential VCC;
the temperature detection point T1 is respectively connected with one end of a resistor R10 and one end of a resistor R11, the other end of the resistor R10 is connected with a reference point VrefN, the other end of the resistor R11 is connected with one end of a capacitor C20, and the other end of the capacitor C20 is connected with a ground wire; the temperature detection point T2 is respectively connected with one end of a resistor R31 and one end of a resistor R12, the other end of the resistor R31 is connected with a reference point VrefN, the other end of the resistor R12 is connected with one end of a capacitor C21, and the other end of the resistor C21 is connected with the ground wire.
8. the two-bus based point-suction type fire detection system according to claim 2, wherein the gas detection module comprises: a switching tube D16, an integrated operational amplifier U2, a regulator chip U4, a field effect tube Q5, a triode Q6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R26, a resistor R99 and a slide rheostat RT 2;
The pin AD _ IN _ Q0 for detecting voltage is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one ends of a capacitor C10 and a capacitor C11, the other end of the capacitor C11 is connected with the ground wire, the other end of the capacitor C10 is connected with the 2 nd pin of an integrated operational amplifier U2, the 2 nd pin of the integrated operational amplifier U2 is respectively connected with one ends of a resistor R14 and a resistor R15, the other end of the resistor R14 is connected with the 1 st pin of the integrated operational amplifier U2, the other end of the resistor R15 is connected with the source of a field effect tube Q5, the drain of the field effect tube Q5 is connected with the 1 st pin of the integrated operational amplifier U2, the gate of the field effect tube Q5 is connected with a RES _ CON port serving as a reset sensor, the 2 nd pin of the operational amplifier U2 is also connected with one end of a resistor R9, the other end of the resistor R695, One end of a resistor R18, one end of a resistor R20 and a sensor negative terminal AD _ IN _ SEN are connected, the other end of a capacitor C7 is connected with the ground, the other end of the resistor R18 is respectively connected with a resistor R19 and a 3 rd pin of an integrated operational amplifier U2, the other end of a resistor R19 is connected with D16, a 4 th pin of the integrated operational amplifier U2 is connected with the ground, the other end of a resistor R20 is respectively connected with a 5 th pin, a 6 th pin and a 7 th pin of an integrated operational amplifier U2 IN sequence, a 5 th pin, a 6 th pin and a 7 th pin of the integrated operational amplifier U2 are respectively connected with one ends of a capacitor C9, a resistor R21, a resistor R22 and a capacitor C8, the other end of the capacitor C9 is respectively connected with the ground, the ground is connected with the other end of the resistor R21, the ground is connected with the other end of the capacitor C8, the other end of the resistor 573R 5 is connected with a positive potential V1.8, and, One end of a capacitor C5, one end of a capacitor C6 and one end of a resistor R23 are connected, the other ends of the capacitor C5 and the capacitor C6 are respectively connected with a ground wire, a 2 nd pin of a regulator chip U4 is connected with the ground wire, a 3 rd pin of a regulator chip U4 is connected with one end of a resistor R99, the other end of the resistor R99 is connected with the ground wire, the other end of the resistor R23 is respectively connected with an AD acquisition port AD _ IN _ TEMP and a collector of a triode Q6, a base of the triode Q6 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with a short circuit detection driving TEMP _ CON, an emitter of the triode Q6 is connected with one end of a sliding rheostat.
9. a two-bus based point-type air-breathing fire detection method implemented by using the two-bus based point-type air-breathing fire detection system of claim 1, comprising the steps of:
step 1: setting airflow flow rate C in an air suction pipeline, smoke particle concentration Y in the air suction pipeline, temperature T and gas Q alarm threshold, starting self-learning the current application environment working condition, and adjusting and setting a response threshold according to actual environment detection parameters;
Step 2: the detection main control board drives the air pump to suck air in the detection environment through the air suction pipeline, the airflow flow rate detection assembly detects the airflow rate in the air suction pipeline in real time in the air suction process until the airflow rate in the air suction pipeline reaches the set airflow flow rate in the air suction pipeline, and step 3 is executed;
and step 3: the N point type air suction smoke detector detects the smoke particle concentration, the temperature and the gas concentration in the gas flowing out of each sampling hole in real time and transmits the smoke particle concentration, the temperature and the gas concentration to the detection main control board;
and 4, step 4: the detection main control board judges whether the current smoke particle concentration is smaller than a smoke particle concentration alarm threshold value: if yes, recording and executing the step 5, otherwise, recording and executing the step 8;
and 5: the detection main control board judges whether the current temperature is less than a temperature alarm threshold value: if yes, recording and executing the step 6, otherwise, recording and executing the step 8;
step 6: the detection main control board judges whether the current gas concentration is less than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise, recording and executing the step 8;
and 7: smoke particle concentration Y, temperature T and gas Q real-time detection values, YA、TA、QAWeighted average and YT、TT、QTwhether the variation trend value parameter is in accordance withif the early warning condition is met, executing the step 8, otherwise, returning to the step 3;
and 8: alarming and communicating with the controller, determining the position of a sampling point, displaying the fire alarm area corresponding to the detection environment area corresponding to the sampling point, and finally returning to the step 3 for re-detection.
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| CN205451363U (en) * | 2016-03-07 | 2016-08-10 | 北京优航机电技术有限公司 | Point type is breathed in formula and is felt cigarette temperature sensing complex detector |
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| CN111724562A (en) * | 2020-06-05 | 2020-09-29 | 珠海格力电器股份有限公司 | Smoke alarm and correction method thereof |
| CN111724562B (en) * | 2020-06-05 | 2021-11-16 | 珠海格力电器股份有限公司 | Smoke alarm and correction method thereof |
| CN111930105A (en) * | 2020-08-19 | 2020-11-13 | 山东众海智能科技有限公司 | Intelligent testing device and system for fire-fighting linkage control module |
| CN111930105B (en) * | 2020-08-19 | 2021-10-29 | 山东众海智能科技有限公司 | Intelligent testing device and system for fire-fighting linkage control module |
| CN112581735A (en) * | 2020-12-14 | 2021-03-30 | 深圳市查知科技有限公司 | Fault positioning system and method for air-breathing smoke detector |
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