CN110570618B - 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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- CN110570618B CN110570618B CN201910811693.5A CN201910811693A CN110570618B CN 110570618 B CN110570618 B CN 110570618B CN 201910811693 A CN201910811693 A CN 201910811693A CN 110570618 B CN110570618 B CN 110570618B
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- 238000001514 detection method Methods 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims description 7
- 239000000779 smoke Substances 0.000 claims abstract description 87
- 238000004891 communication Methods 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 144
- 238000005070 sampling Methods 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 19
- 230000005669 field effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 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
- 230000008859 change Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 13
- 239000000523 sample Substances 0.000 description 5
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- 230000006870 function Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect 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 two-bus-based point-type air suction fire detection system and a two-bus-based point-type air suction fire detection method, wherein the two-bus-based point-type air suction fire detection system comprises the following steps: the system comprises a controller, two buses and N point type air suction smoke detectors; the controller receives detection signals of N point-type air-suction smoke detectors through two buses, each point-type air-suction smoke detector judges whether fire occurs or not and sends out an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire; the two buses are used for supplying power to the whole detection system and are communicated 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 warning detection and fire source positioning of fire in a large storage place. 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 can not be positioned by detection are solved according to the distribution detection positioning.
Description
Technical Field
The invention belongs to the technical field of fire detection, and particularly relates to a two-bus-based point-type air suction type fire detection system and method.
Background
The time period during which the fire starts to smolder from the generation of the fire source and changes to flame to generate high heat is very critical. There are two possible situations during this time: firstly, the situation is continuously worsened, and then the flame is ignited; or taking action to find out the fire source and stop the fire, so as to avoid the danger, loss and damage caused by the fire.
The development of fire is divided into four phases: the incubation (before combustion), visible smoke, generates a flame and a high heat stage. Providing more time and opportunities to detect and control the development of fires during the incubation phase of smoldering fires. The suction type fire detector is mainly applied to early stage of fire detection, and high-sensitivity smoke particle detection is realized by using related photoelectron technology, and each sampling point of the suction type fire detector is regarded as a point type detector. The longest sample air transmission time from the furthest sample point to the detector cannot exceed 120 seconds. The working mode and the constitution of the air suction type fire disaster detector mainly adopted in the market at present are that a host machine (the inside of the host machine 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 extremely early detection of fire and provides an effective solution for places where certain traditional fire alarm detectors cannot be applicable, so that the air sampling type (air suction type) smoke detector is widely used in places such as clean plants, warehouses (especially overhead warehouses), telecommunication rooms, IDC (internet data center) rooms, distribution boards and the like.
Traditional inspiration formula detection distance mainly adopts single pipeline or multitube way scanning to realize long distance large tracts of land to cover and surveys, can't judge the conflagration position when one of them pipeline reports to the police, and the scanning mode still needs to judge alarm pipeline through the scanning, and unable timely detection location fire alarm position leads to conflagration location speed slow, influences the accurate discovery in conflagration early and deals with.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a two-bus-based point-type air suction type fire detection system and a two-bus-based point-type air suction type fire detection method, wherein the two-bus-based point-type air suction type fire detection system comprises the following components: the system comprises a controller, two buses and N point type air suction smoke detectors;
the controller is connected with the N point type air suction smoke detectors through two buses respectively;
the controller receives detection signals of N point-type air-suction smoke detectors through two buses, each point-type air-suction smoke detector judges whether fire occurs or not and sends out an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire;
the two buses are used for supplying power to the whole detection system and are communicated with each point-type air suction smoke detector;
The two buses are two wires, the wiring is simple in a nonpolar connection mode, and the communication between the controller and the detector is realized by adopting the bus communication module. The connection mode is that the controller communicates with two bus communication modules through serial ports, the two bus communication modules communicate with two bus terminal modules in a two-bus mode and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with a terminal processing singlechip 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 to realize the functions of detecting airflow velocity, smoke, temperature and gas detection, acquiring and determining an alarm threshold adapted to the site according to site normal monitoring data acquired by self-learning, judging whether fire alarm conditions are met or not, sending alarm signals, and simultaneously sending all detection data to a main controller through two buses;
the spot type inspiration smoke detector is characterized in that the spot type inspiration smoke detector is used for self-learning acquired spot normal monitoring data and determining an alarm threshold value of a spot, and the spot type inspiration smoke detector comprises the following steps:
the current monitoring data collected every second is C0, and the alarm threshold data B is:
B＝C0+(CA-C0)/X
And (3) averaging the calculated alarm threshold B once every 7 seconds, and determining a final alarm threshold B' after the set self-learning time is circularly acquired, wherein CA is the detection maximum value, and X is the alarm level manually regulated.
The point type air suction smoke detector specifically comprises: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multistage filtering assembly and a pipeline connection adapter;
the gas to be tested is connected with the adapter through the multistage filtering component and the pipeline, 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 a detection main control board, the detection main control board is respectively connected with the airflow 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 and bus are connected: realizing line connection and level conversion of the fixed detector and the two buses;
the bus connection specifically comprises: diode D5, transistor Q7, bi-directional diode D4, rectifier bridge D3, fuse F1, capacitor C12, capacitor C13, resistor R35, resistor R36, resistor R40, and resistor R41;
The bus input line 1VIN1 is respectively connected with one end of a bidirectional diode D4 and a 1 st pin of a rectifier bridge D3, the bus input line 2VIN2 is respectively connected with the other end of the bidirectional diode D4 and one end of a fuse F1, the other end of the fuse F1 is connected with a 2 nd pin of the rectifier bridge D3, a 3 rd pin of the rectifier bridge D3 is respectively connected with one end of a resistor R36, a collector of a triode Q7 and an anode of a diode D5, a 4 th pin of the rectifier bridge D3 is respectively connected with one end of a capacitor C12 and a capacitor C13, the other end of the resistor R36 is respectively connected with one end of a signal input EIN of a bus and one end of a resistor R40, the other end of the resistor R40 is connected with the 4 th pin of the rectifier bridge D3, an emitter of the triode Q7 is connected with one end of a resistor R41, the other end of the resistor R41 is connected with a 4 th pin of the rectifier bridge D3, a base of the triode Q7 is connected with one end of a resistor R35, the other end of the resistor R35 is connected with a signal input EOUT of the bus, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and the other end 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 velocity detection assembly comprises: the detection main control is used for controlling all components, the airflow flow rate detection component is used for detecting the sampling airflow flow rate of the pipeline and judging whether the pipeline is blocked or damaged;
The smoke detection assembly: for detecting whether the smoke concentration meets an alarm threshold;
the smoke detection assembly specifically comprises: the first operational amplifier U1A, the second operational amplifier U1B, the light emitting diode D1, the photoelectric sensor D2, the capacitor C1, the capacitor C3, the triode Q2, the triode Q4, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the 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 electrode of the triode Q2, the collector electrode 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 electrode of the triode Q4, the base electrode of the triode Q4 is connected with the emitter electrode of the triode Q2, the emitter electrode 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 resistor R9 is respectively connected with the ground wire and the other end of the capacitor C3;
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 a 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 the second operational amplifier U1B, the other end of the resistor R7 is connected with the ground wire, the inverting input end of the second operational amplifier U1B is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the second operational amplifier U1B, the positive power end of the second operational amplifier U1B is connected with VCC, the output end of the second operational amplifier U1B is connected with the non-inverting input end of the first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with the inverting input end of the first operational amplifier U1A and one end of the resistor R8, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power end of the first operational amplifier U1A is connected with the positive power end of the positive power supply C is connected with the positive power end of the capacitor C1A, and the positive power end of the positive power supply C is connected with the positive power end of the capacitor C1C is connected with the positive power end of the positive power supply C1C is connected with the positive power supply;
The temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value or not and is also used for temperature compensation conditions of other detection devices;
the temperature detection assembly specifically comprises: the third operational amplifier U3, the capacitor C20, the capacitor C21, the capacitor C23, the capacitor C26, the capacitor C40, the resistor R10, the resistor R11, the resistor R12, the resistor R31, the resistor R63 and the 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 the third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point VrefN, the 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, and the other end of the capacitor C26 is connected with signal ground;
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: for detecting whether the gas concentration meets an alarm threshold;
the gas detection assembly specifically comprises: the integrated operational amplifier U2, the regulator chip U4, the field effect transistor Q5, the triode Q6, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, the resistor R13, the resistor R14, the resistor R15, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R21, the resistor R22, the resistor R23, the resistor R26, the resistor R99 and the sliding rheostat RT2;
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 end of a capacitor C10 and one end of a capacitor C11, the other end of the capacitor C11 is connected with a ground wire, the other end of the capacitor C10 is connected with one end of an integrated operational amplifier U2, the 2 nd pin of the integrated operational amplifier U2 is respectively connected with one end of a resistor R14 and one end of 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 electrode of a field effect transistor Q5, the drain electrode of the field effect transistor Q5 is connected with the 1 st pin of the integrated operational amplifier U2, the grid electrode of the field effect transistor Q5 is connected with a reset sensor RES_CON port, the 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 with one end of a resistor R17, the other end of the resistor R17 is respectively connected with one end of a capacitor C7, one end of a resistor R18, one end of a resistor R20 and a sensor negative end AD_IN_SEN, the other end of the capacitor C7 is connected with a ground wire, the other end of the resistor R18 is respectively connected with a resistor R19 and a 3 rd pin of the integrated operational amplifier U2, the other end of the resistor R19 is connected with a D16, a 4 th pin of the integrated operational amplifier U2 is connected with the ground wire, the other end of the 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 turn, the 5 th pin, the 6 th pin and the 7 th pin of the integrated operational amplifier U2 are respectively connected with one end of the capacitor C9, the resistor R21, the resistor R22 and the capacitor C8, the other end of the capacitor C9 is respectively connected with the other end of the resistor R21 and the ground wire, the ground wire is connected with the other end of the capacitor C8, the other end of the resistor R22 is connected with a positive potential V1.8, the positive potential V1.8 is respectively connected with an 8 th pin of the integrated operational amplifier U2, a 5 th pin of the regulator chip U4, 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 the 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 electrode of a triode Q6, a base electrode 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 electrode of the triode Q6 is connected with one end of a sliding rheostat RT2, and the other end of the sliding rheostat RT2 is connected with the ground wire.
The multistage filter assembly and the pipeline connection adapter are connected with each other through the pipeline: the sampling pipeline is used for connecting a sampling pipeline;
the controller specifically comprises: the control panel, 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 respectively connected with the display screen, the main and standby power components, the key input, the two bus communication connection detection components and the data communication alarm fault signal output;
the control board 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;
the main and standby power components are used for providing a stable power supply;
the key input is used for inputting information
The two buses are in communication connection with the control assembly and are used for communicating with the two bus terminal modules by a control board in the bridging controller;
the data communication alarm fault signal is output; the system is used for outputting a passive alarm fault signal;
the two-bus-based point-type air suction type fire detection method is realized by adopting the two-bus-based point-type air suction type fire detection system and comprises the following steps of:
step 1: setting an airflow velocity C in an air suction pipeline, a smoke particle concentration Y, a temperature T and an air Q alarm threshold value in the air suction pipeline, starting up to self-learn the current application environment working condition, and adjusting and setting a response threshold value according to the actual environment detection parameters;
Step 2: the detection main control board drives the air pump to inhale the air in the detection environment through the air inhaling pipeline, and the air flow rate detection component detects the air flow rate in the air inhaling pipeline in real time in the air inhaling process until the air flow rate in the air inhaling pipeline reaches the set air flow rate in the air inhaling pipeline, and the step 3 is executed;
step 3: the N point type air suction smoke detectors detect the concentration, the temperature and the gas concentration of smoke particles in the gas flowing out of each sampling hole in real time and transmit the smoke particles, the temperature and the gas concentration to a detection main control board;
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;
step 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 smaller than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise recording and executing the step 8;
step 7: smoke particle concentration Y, temperature T and gas Q real-time detection value and Y A 、T A 、Q A Weighted average and Y T 、T T 、Q T If the change trend value parameter meets the early warning condition, executing the step 8, otherwise, returning to the step 3;
Step 8: alarming and communicating with the controller, determining the position of a sampling point, wherein the detection environment area corresponding to the sampling point is a fire alarm area, displaying the fire alarm area, and finally returning to the step 3 for re-detection.
The beneficial technical effects of the invention are as follows:
the invention provides a high-sensitivity fire detection and positioning device based on a high-current two-bus power supply and communication loop, a distributed airflow and high-sensitivity detection assembly, and the fire early warning detection and fire source positioning of a large-scale storage place are realized through distribution 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 can not be positioned by detection are solved according to the distribution detection positioning.
Drawings
FIG. 1 is a schematic block diagram of a two-bus-based point-type air-breathing fire detection system according to an embodiment of the present invention;
FIG. 2 is an overall block diagram of an inhalation smoke detector according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control board connection relationship according to an embodiment of the present invention;
FIG. 4 is a flow chart of a two-bus-based point-type air-breathing fire detection method according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a smoke detection assembly according to 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 according to an embodiment of the present invention;
FIG. 8 is a circuit diagram of a base and bus connection according to an embodiment of the invention;
FIG. 9 is a circuit diagram of a detection master control board according to an embodiment of the invention;
FIG. 10 is a reset circuit diagram of a detection master control board according to an embodiment of the invention;
FIG. 11 is a circuit diagram of a master detection board crystal oscillator according to an embodiment of the invention;
FIG. 12 is a circuit diagram of a download port of a probe motherboard according to an embodiment of the present invention;
FIG. 13 is a diagram of a memory circuit of a probing motherboard according to an embodiment of the present invention;
FIG. 14 is a diagram of a motherboard power circuit for probing according to an embodiment of the present invention;
in the figure: 1-sampling hole, 2-point type suction detection component.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments, wherein a two-bus-based point-type air-breathing fire detection system and method, as shown in fig. 1, comprises: the system comprises a controller, two buses and N point type air suction smoke detectors;
the controller is connected with the N point type air suction smoke detectors through two buses respectively;
the controller receives detection signals of N point-type air-suction smoke detectors through two buses, each point-type air-suction smoke detector judges whether fire occurs or not and sends out an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire;
The two buses are used for supplying power to the whole detection system and are communicated with each point-type air suction smoke detector;
the two buses are 2 wires, the wiring is simple in a nonpolar connection mode, and the communication between the controller and the detector is realized by adopting the bus communication module. The connection mode is that the controller communicates with two bus communication modules through serial ports, the two bus communication modules communicate with two bus terminal modules in a two-bus mode and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with a terminal processing singlechip through level conversion. Bus communication module model SYPB620 and terminal module model SYPB331.
The point-type air suction smoke detector is characterized in that as shown in fig. 2, a base is connected with two bus communication modules, a pipeline connection conversion head is connected with an air suction pipeline, so that the functions of airflow speed detection, smoke detection, temperature detection and gas detection are realized, on-site normal monitoring data obtained through self-learning are collected and determined to adapt to an on-site alarm threshold value, whether fire alarm conditions are met or not is judged, an alarm signal is sent, and all detection data are sent to a main controller through two buses;
the spot type inspiration smoke detector is characterized in that the spot type inspiration smoke detector is used for self-learning acquired spot normal monitoring data and determining an alarm threshold value of a spot, and the spot type inspiration smoke detector comprises the following steps:
The current monitoring data collected every second is C0, and the alarm threshold data B is:
B＝C0+(CA-C0)/X
and (3) averaging the calculated alarm threshold B once every 7 seconds, and determining a final alarm threshold B' after the set self-learning time is circularly acquired, wherein CA is the detection maximum value, and X is the alarm level manually regulated.
The point type air suction smoke detector specifically comprises: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multistage filtering assembly and a pipeline connection adapter;
the gas to be tested is connected with the adapter through the multistage filtering component and the pipeline, 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 a detection main control board, the detection main control board is respectively connected with the airflow 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 and bus are connected: realizing line connection and level conversion of the fixed detector and the two buses;
the bus connection, as shown in fig. 8, specifically includes: diode D5, transistor Q7, bi-directional diode D4, rectifier bridge D3, fuse F1, capacitor C12, capacitor C13, resistor R35, resistor R36, resistor R40, and resistor R41;
The bus input line 1VIN1 is respectively connected with one end of a bidirectional diode D4 and a 1 st pin of a rectifier bridge D3, the bus input line 2VIN2 is respectively connected with the other end of the bidirectional diode D4 and one end of a fuse F1, the other end of the fuse F1 is connected with a 2 nd pin of the rectifier bridge D3, a 3 rd pin of the rectifier bridge D3 is respectively connected with one end of a resistor R36, a collector of a triode Q7 and an anode of a diode D5, a 4 th pin of the rectifier bridge D3 is respectively connected with one end of a capacitor C12 and a capacitor C13, the other end of the resistor R36 is respectively connected with one end of a signal input EIN of a bus and one end of a resistor R40, the other end of the resistor R40 is connected with the 4 th pin of the rectifier bridge D3, an emitter of the triode Q7 is connected with one end of a resistor R41, the other end of the resistor R41 is connected with a 4 th pin of the rectifier bridge D3, a base of the triode Q7 is connected with one end of a resistor R35, the other end of the resistor R35 is connected with a signal input EOUT of the bus, the other end of the capacitor C12 is connected with the other end of the capacitor C13 and the other end 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 velocity detection assembly comprises: the detection main control is used for controlling all components, the airflow flow rate detection component is used for detecting the sampling airflow flow rate of the pipeline and judging whether the pipeline is blocked or damaged;
The smoke detection assembly: for detecting whether the smoke concentration meets an alarm threshold;
fig. 5 is a smoke detection photo circuit, smoke being detected by the D2 photo tube of fig. 5.
The smoke detection assembly, as shown in fig. 5, specifically includes: the first operational amplifier U1A, the second operational amplifier U1B, the light emitting diode D1, the photoelectric sensor D2, the capacitor C1, the capacitor C3, the triode Q2, the triode Q4, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the 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 electrode of the triode Q2, the collector electrode 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 electrode of the triode Q4, the base electrode of the triode Q4 is connected with the emitter electrode of the triode Q2, the emitter electrode 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 resistor R9 is respectively connected with the ground wire and the other end of the capacitor C3;
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 a 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 the second operational amplifier U1B, the other end of the resistor R7 is connected with the ground wire, the inverting input end of the second operational amplifier U1B is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the second operational amplifier U1B, the positive power end of the second operational amplifier U1B is connected with VCC, the output end of the second operational amplifier U1B is connected with the non-inverting input end of the first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with the inverting input end of the first operational amplifier U1A and one end of the resistor R8, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power end of the first operational amplifier U1A is connected with the positive power end of the positive power supply C is connected with the positive power end of the capacitor C1A, and the positive power end of the positive power supply C is connected with the positive power end of the capacitor C1C is connected with the positive power end of the positive power supply C1C is connected with the positive power supply;
The temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value or not and is also used for temperature compensation conditions of other detection devices;
the temperature detecting assembly, as shown in fig. 6, specifically includes: the third operational amplifier U3, the capacitor C20, the capacitor C21, the capacitor C23, the capacitor C26, the capacitor C40, the resistor R10, the resistor R11, the resistor R12, the resistor R31, the resistor R63 and the 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 the third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point VrefN, the 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, and the other end of the capacitor C26 is connected with signal ground;
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: for detecting whether the gas concentration meets an alarm threshold;
the gas detection assembly, as shown in fig. 7, specifically includes: the integrated operational amplifier U2, the regulator chip U4, the field effect transistor Q5, the triode Q6, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, the resistor R13, the resistor R14, the resistor R15, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R21, the resistor R22, the resistor R23, the resistor R26, the resistor R99 and the sliding rheostat RT2;
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 end of a capacitor C10 and one end of a capacitor C11, the other end of the capacitor C11 is connected with a ground wire, the other end of the capacitor C10 is connected with one end of an integrated operational amplifier U2, the 2 nd pin of the integrated operational amplifier U2 is respectively connected with one end of a resistor R14 and one end of 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 electrode of a field effect transistor Q5, the drain electrode of the field effect transistor Q5 is connected with the 1 st pin of the integrated operational amplifier U2, the grid electrode of the field effect transistor Q5 is connected with a reset sensor RES_CON port, the 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 with one end of a resistor R17, the other end of the resistor R17 is respectively connected with one end of a capacitor C7, one end of a resistor R18, one end of a resistor R20 and a sensor negative end AD_IN_SEN, the other end of the capacitor C7 is connected with a ground wire, the other end of the resistor R18 is respectively connected with a resistor R19 and a 3 rd pin of the integrated operational amplifier U2, the other end of the resistor R19 is connected with a D16, a 4 th pin of the integrated operational amplifier U2 is connected with the ground wire, the other end of the 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 turn, the 5 th pin, the 6 th pin and the 7 th pin of the integrated operational amplifier U2 are respectively connected with one end of the capacitor C9, the resistor R21, the resistor R22 and the capacitor C8, the other end of the capacitor C9 is respectively connected with the other end of the resistor R21 and the ground wire, the ground wire is connected with the other end of the capacitor C8, the other end of the resistor R22 is connected with a positive potential V1.8, the positive potential V1.8 is respectively connected with an 8 th pin of the integrated operational amplifier U2, a 5 th pin of the regulator chip U4, 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 the 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 electrode of a triode Q6, a base electrode 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 electrode of the triode Q6 is connected with one end of a sliding rheostat RT2, and the other end of the sliding rheostat RT2 is connected with the ground wire.
The multistage filter assembly and the pipeline connection adapter are connected with each other through the pipeline: the sampling pipeline is used for connecting a sampling pipeline;
the controller specifically comprises: the control panel, 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 respectively connected with the display screen, the main and standby power components, the key input, the two bus communication connection detection components and the data communication alarm fault signal output; as shown in fig. 3;
the control board is used for communicating with the two-bus point type air suction smoke detector and controlling the whole machine as shown in fig. 9, 10, 11, 12, 13 and 14;
the display screen displays information such as alarm faults;
the main and standby power components are used for providing a stable power supply;
the key input is used for inputting information
The two buses are in communication connection with the control assembly and are used for communicating with the two bus terminal modules by a control board in the bridging controller;
the data communication alarm fault signal is output; the system is used for outputting a passive alarm fault signal;
the two-bus-based point-type air-suction fire detection method is realized by adopting the two-bus-based point-type air-suction fire detection system, as shown in fig. 4, and comprises the following steps:
Step 1: setting an airflow velocity C in an air suction pipeline, a smoke particle concentration Y, a temperature T and an air Q alarm threshold value in the air suction pipeline, starting up to self-learn the current application environment working condition, and adjusting and setting a response threshold value according to the actual environment detection parameters;
step 2: the detection main control board drives the air pump to inhale the air in the detection environment through the air inhaling pipeline, and the air flow rate detection component detects the air flow rate in the air inhaling pipeline in real time in the air inhaling process until the air flow rate in the air inhaling pipeline reaches the set air flow rate in the air inhaling pipeline, and the step 3 is executed;
step 3: the N point type air suction smoke detectors detect the concentration, the temperature and the gas concentration of smoke particles in the gas flowing out of each sampling hole in real time and transmit the smoke particles, the temperature and the gas concentration to a detection main control board;
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;
step 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 smaller than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise recording and executing the step 8;
Step 7: smoke particle concentration Y, temperature T and gas Q real-time detection value and Y A 、T A 、Q A Weighted average and Y T 、T T 、Q T If the change trend value parameter meets the early warning condition, executing the step 8, otherwise, returning to the step 3;
step 8: alarming and communicating with the controller, determining the position of a sampling point, wherein the detection environment area corresponding to the sampling point is a fire alarm area, displaying the fire alarm area, and finally returning to the step 3 for re-detection.
Claims (9)
1. A two-bus-based point-type aspirated fire detection system, comprising: the system comprises a controller, two buses and N point type air suction smoke detectors;
the controller is connected with the N point type air suction smoke detectors through two buses respectively;
the controller receives detection signals of N point-type air-suction smoke detectors through two buses, each point-type air-suction smoke detector judges whether fire occurs or not and sends out an alarm signal according to a preset threshold value, and the controller receives and judges the specific position of the fire;
the two buses are used for supplying power to the whole detection system and are communicated with each point-type air suction smoke detector;
the two buses are two wires, are wired in a nonpolar connection mode, and realize communication between the controller and the detector by adopting a bus communication module, wherein the connection mode is that the controller is communicated with the two bus communication modules through serial ports, the two bus communication modules are communicated with two bus terminal modules and supply power, and the two bus terminal modules realize terminal power supply and serial port communication with a terminal processing singlechip through level conversion;
The point-type air suction smoke detector comprises a base, two bus communication modules, a pipeline connection conversion head, a main controller, a smoke detection pipeline, a temperature detection pipeline, a smoke detection pipeline and a smoke detection pipeline.
2. The two-bus-based spot-type air-breathing fire detection system as claimed in claim 1, wherein the spot-type air-breathing smoke detector is used for self-learning the acquired spot normal state monitoring data and determining the spot 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
and (3) averaging the calculated alarm threshold B once every 7 seconds, and determining a final alarm threshold B' after the set self-learning time is circularly acquired, wherein CA is the detection maximum value, and X is the alarm level manually regulated.
3. The two-bus based spot-type aspirated fire detection system of claim 1, wherein the spot-type aspirated smoke detector specifically comprises: the device comprises a base, a bus connection, a low-power-consumption centrifugal air pump, a detection main control board, an airflow velocity detection assembly, a smoke detection assembly, a temperature detection assembly, a gas detection assembly, a multistage filtering assembly and a pipeline connection adapter;
The gas to be tested is connected with the adapter through the multistage filtering component and the pipeline, 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 a detection main control board, the detection main control board is respectively connected with the airflow 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 and bus are connected: realizing line connection and level conversion of the fixed detector and the two buses;
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 velocity detection assembly comprises: the detection main control is used for controlling all components, the airflow flow rate detection component is used for detecting the sampling airflow flow rate of the pipeline and judging whether the pipeline is blocked or damaged;
the smoke detection assembly: for detecting whether the smoke concentration meets an alarm threshold;
the temperature detection assembly: the temperature compensation device is used for detecting whether the temperature meets an alarm threshold value or not and is also used for temperature compensation conditions of other detection devices;
the gas detection assembly: for detecting whether the gas concentration meets an alarm threshold;
The multistage filter assembly and the pipeline connection adapter are connected with each other through the pipeline: the sampling pipeline is used for connecting a sampling pipeline;
the controller specifically comprises: the control panel, 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.
4. The two-bus-based spot-type air-breathing fire detection system as claimed in claim 2, wherein in the controller, the control panel is respectively connected with the display screen, the main and standby electric components, the key input, the two-bus communication connection detection component and the data communication alarm fault signal output;
the control board is used for communicating with the two bus point type air suction smoke detector and controlling the whole machine;
the display screen displays alarm fault information;
the main and standby power components are used for providing a stable power supply;
the key input is used for inputting information
The two buses are in communication connection with the control assembly and are used for communicating with the two bus terminal modules by a control board in the bridging controller;
the data communication alarm fault signal is output; for outputting a passive alarm fault signal.
5. A two-bus based point-type aspirated fire detection system according to claim 2, wherein the bus connection comprises in particular: diode D5, transistor Q7, bi-directional diode D4, rectifier bridge D3, fuse F1, capacitor C12, capacitor C13, resistor R35, resistor R36, resistor R40, and resistor R41;
Bus input line 1VIN1 is connected with one end of bidirectional diode D4 and 1 st pin of rectifier bridge D3 respectively, bus input line 2VIN2 is connected with the other end of bidirectional diode D4 and one end of fuse F1 respectively, the other end of fuse F1 is connected with 2 nd pin of rectifier bridge D3, 3 rd pin of rectifier bridge D3 is connected with one end of resistor R36 respectively, collector of transistor Q7 and anode of diode D5, 4 th pin of rectifier bridge D3 is connected with one end of capacitor C12 and one end of capacitor C13 respectively, the other end of resistor R36 is connected with signal input EIN of bus and one end of resistor R40 respectively, the other end of resistor R40 is connected with 4 th pin of rectifier bridge D3, the emitter of transistor Q7 is connected with one end of resistor R41, the other end of resistor R41 is connected with 4 th pin of rectifier bridge D3, the base of transistor Q7 is connected with one end of resistor R35, the other end of resistor R35 is connected with signal input EOUT of bus, the other end of capacitor C12 and the other end of capacitor C13 are connected with cathode of diode D5.
6. A two-bus based spot fire detection system according to claim 2, wherein the smoke detection assembly comprises: the first operational amplifier U1A, the second operational amplifier U1B, the light emitting diode D1, the photoelectric sensor D2, the capacitor C1, the capacitor C3, the triode Q2, the triode Q4, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8 and the 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 electrode of the triode Q2, the collector electrode 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 electrode of the triode Q4, the base electrode of the triode Q4 is connected with the emitter electrode of the triode Q2, the emitter electrode 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 resistor R9 is respectively connected with the ground wire and the other end of the capacitor C3;
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 a 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 the second operational amplifier U1B, the other end of the resistor R7 is connected with the ground wire, the inverting input end of the second operational amplifier U1B is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the second operational amplifier U1B, the positive power end of the second operational amplifier U1B is connected with VCC, the output end of the second operational amplifier U1B is connected with the non-inverting input end of the first operational amplifier U1A, the non-inverting input end of the second operational amplifier U1B is connected with one end of the resistor R5, the other end of the resistor R5 is respectively connected with the inverting input end of the first operational amplifier U1A and one end of the resistor R8, the other end of the resistor R8 is connected with the output end of the first operational amplifier U1A, the positive power end of the first operational amplifier U1A is connected with the positive power end of the positive power supply VCC is connected with the positive power end of the capacitor C1C, and the positive power end of the positive power supply C is connected with the positive power end of the capacitor C1C is connected with the positive power end of the positive power supply C1C is connected with the positive power supply.
7. The two-bus based spot-type aspirated fire detection system of claim 2, wherein the temperature detection assembly specifically comprises: the third operational amplifier U3, the capacitor C20, the capacitor C21, the capacitor C23, the capacitor C26, the capacitor C40, the resistor R10, the resistor R11, the resistor R12, the resistor R31, the resistor R63 and the 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 the third operational amplifier U3, the output end of the third operational amplifier U3 is connected with a reference point VrefN, the 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, and the other end of the capacitor C26 is connected with signal ground;
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.
8. A two-bus based spot fire detection system according to claim 3, wherein the gas detection assembly comprises: the integrated operational amplifier U2, the regulator chip U4, the field effect transistor Q5, the triode Q6, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, the resistor R13, the resistor R14, the resistor R15, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R21, the resistor R22, the resistor R23, the resistor R26, the resistor R99 and the sliding rheostat RT2;
the pin AD_IN_Q0 of the detection voltage is connected with one end of a resistor R13, the other end of the resistor R13 is respectively connected with one end of a capacitor C10 and one end of a capacitor C11, the other end of the capacitor C11 is connected with a 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 end of a resistor R14 and one end of 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 electrode of a field effect transistor Q5, the drain electrode of the field effect transistor Q5 is connected with the 1 st pin of the integrated operational amplifier U2, the grid electrode of the field effect transistor Q5 is connected with a port serving as a reset sensor RES_CON, the 2 nd pin of the integrated operational amplifier U2 is also connected with one end of a resistor R16, the other end of the resistor R16 is connected with one end of the resistor R17, the other end of the resistor R17 is respectively connected with one end of a capacitor C7, one end of a resistor R18, one end of a resistor R20 and a sensor negative end AD_IN_SEN, the other end of the capacitor C7 is connected with a ground wire, 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 the resistor R19 is connected with a D16, a 4 th pin of the operational amplifier U2 is connected with the ground wire, the other end of the resistor R20 is respectively connected with a 5 th pin, a 6 th pin and a 7 th pin of the operational amplifier U2 IN turn, a 5 th pin, a 6 th pin and a 7 th pin of the operational amplifier U2 are respectively connected with a capacitor C9, a resistor R21, a resistor R22 and one end of the capacitor C8, the other end of the capacitor C9 is respectively connected with the other end of the resistor R21 and the ground wire, the ground wire is connected with the other end of the capacitor C8, the other end of the resistor R22 is connected with a positive potential V1.8, a positive potential V1.8 is respectively connected with a 8 th pin of the operational amplifier U2, a positive potential V1.8 is respectively connected with a 5 th pin of the regulator chip U4, 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 the 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 electrode of a triode Q6, a base electrode 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 electrode of the triode Q6 is connected with one end of a sliding rheostat RT2, and the other end of the sliding rheostat RT2 is connected with the ground wire.
9. A two-bus-based point-type air-breathing fire detection method implemented by the two-bus-based point-type air-breathing fire detection system according to claim 1, comprising the steps of:
step 1: setting an airflow velocity C in an air suction pipeline, a smoke particle concentration Y, a temperature T and an air Q alarm threshold value in the air suction pipeline, starting up to self-learn the current application environment working condition, and adjusting and setting a response threshold value according to the actual environment detection parameters;
step 2: the detection main control board drives the air pump to inhale the air in the detection environment through the air inhaling pipeline, and the air flow rate detection component detects the air flow rate in the air inhaling pipeline in real time in the air inhaling process until the air flow rate in the air inhaling pipeline reaches the set air flow rate in the air inhaling pipeline, and the step 3 is executed;
step 3: the N point type air suction smoke detectors detect the concentration, the temperature and the gas concentration of smoke particles in the gas flowing out of each sampling hole in real time and transmit the smoke particles, the temperature and the gas concentration to a detection main control board;
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;
Step 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 smaller than a gas concentration alarm threshold value: if yes, recording and executing the step 7, otherwise recording and executing the step 8;
step 7: smoke particle concentration Y, temperature T and gas Q real-time detection value and Y A 、T A 、Q A Weighted average and Y T 、T T 、Q T If the change trend value parameter meets the early warning condition, executing the step 8, otherwise, returning to the step 3;
step 8: alarming and communicating with the controller, determining the position of a sampling point, wherein the detection environment area corresponding to the sampling point is a fire alarm area, displaying the fire alarm area, and finally returning to the step 3 for re-detection.
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| 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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| CN104464166A (en) * | 2014-12-16 | 2015-03-25 | 公安部沈阳消防研究所 | Air-breathing fire detecting system and method based on open-loop air channel |
| CN105374154A (en) * | 2015-01-20 | 2016-03-02 | 西安博康电子有限公司 | Point type active smoke detector with or without gas production tube, and air sampling system |
| WO2016116024A1 (en) * | 2015-01-20 | 2016-07-28 | 西安博康电子有限公司 | Point-type active smoke detector with or without gas sampling tube and air sampling system |
| CN204856805U (en) * | 2015-07-30 | 2015-12-09 | 上海松江飞繁电子有限公司 | Cigarette fire detection circuit is felt to some type photoelectricity |
| 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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