CN108469457A - Three-in-one gas detector based on bussing technique - Google Patents
Three-in-one gas detector based on bussing technique Download PDFInfo
- Publication number
- CN108469457A CN108469457A CN201810214822.8A CN201810214822A CN108469457A CN 108469457 A CN108469457 A CN 108469457A CN 201810214822 A CN201810214822 A CN 201810214822A CN 108469457 A CN108469457 A CN 108469457A
- Authority
- CN
- China
- Prior art keywords
- feet
- foot
- processing module
- central processing
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Abstract
The present invention relates to a kind of three-in-one gas detector based on bussing technique, belongs to pipe safety monitoring system technical field.Central processing module；The electric signal of reception is inputed to central processing module by the input module being connected with central processing module input terminal；The signal that central processing module exports is output to outside detector by the output module being connected with central processing module output end, and is received from external signal；The human-machine interface module being connected with central processing module shows gas concentration and alarm, fault message；And the power conversion module for all module for power supply.The beneficial effects of the invention are as follows：Communication modes of the present invention support RS485 buses and two lines bus, two kinds of communication buses to only take up the serial ports of a microcontroller, switch bus form by toggle switch.3 leakage of the heavy oil volatilization gas such as crude oil, diesel oil, explosion hazard, concentration of hydrogen sulfide characteristics are detected simultaneously.
Description
Technical field
The present invention relates to a kind of three-in-one gas detector based on bussing technique, belongs to pipe safety monitoring system technology
Field.
Background technology
Oil is a kind of strategic energy, is lifeline to develop national economy, oil is durings exploitation, storage and transportation, refining etc.
There are the possibility of leakage, the oil gas to volatilize after Oil spills to easily cause explosion, hydrogen sulfide is contained in oil, leakage is that have appearance
Easily emitting hydrogen sulfide leads to personnel's intoxication accident.Traditional combustible gas probe detects stone while can not be timely, effective
Oil leakage, explosion hazard and concentration of hydrogen sulfide.
Find that the means of Oil spills are mainly depended on pressure abrupt climatic change and manual inspection, only work as oil pipeline at this stage
Pressure jump detection is just effective when the major accidents such as generation fracture, and the method cost of manual inspection is very high, and polling period is very
It is long, hidden danger is generated in polling period, patrol officer can not have found that hidden danger easily develops into explosion accident, threat to life in time
And property safety.
Field erected combustible gas probe can only detect the combustable gas concentration within the scope of 1%LEL ~ 100%LEL,
Leakage and hydrogen sulfide can not be detected.3 detectors are installed in same position and separately detect Oil spills, explosion hazard and vulcanization
Hydrogen concentration considerably increases buying, installation, maintenance difficulties and cost, influences live beauty.
Invention content
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide kind of the three-in-one gas based on bussing technique and visit
Device is surveyed, the serial ports of a microcontroller, while 3 leakage of detection gas, explosion hazard, concentration of hydrogen sulfide characteristics are only taken up.
The present invention is achieved through the following technical solutions：A kind of three-in-one gas detector based on bussing technique, packet
It includes：
Central processing module is made of microcontroller and its minimum system circuit；
Input module is connected with central processing module input terminal, and the electric signal of reception is inputed to central processing module；
Output module is connected with central processing module output end, and the TTL signal that central processing module exports is converted into
RS485 signals are output to outside detector, and are received from external two lines bus signal；
Human-machine interface module is connected with central processing module, for showing oil gas, fuel gas, the concentration of hydrogen sulfide and report
Alert, fault message；And
Input voltage is converted to predeterminated voltage by power conversion module, is all module for power supply of detector.
Preferably, the input module includes：
Gas concentration is converted into voltage signal by linear semiconductor sensor, is conveyed to after Signal-regulated kinase in being conveyed to again
Entreat processing module；
Combustable gas concentration is converted into digital signal, is conveyed to central processing module by infrared sensor；And
Concentration of hydrogen sulfide is converted into current signal by electrochemical sensor, and center is conveyed to again after being conveyed to Signal-regulated kinase
Processing module.
Preferably, the infrared sensor uses MH440D chips, shares 5 pins, 2 foot VCC and 1 foot GND
For power pins, connection 5V_sensor and GND, 3 foot RXD and 5 foot TXD are serial ports, are connected with central processing module, centre
Manage the concentration data that module reads infrared sensor by serial ports.
Preferably, the linear semiconductor sensor uses BDT chips, 1 foot to meet 5V, and 3 feet meet GND, and 2 feet are signal
Output；The Signal-regulated kinase includes an operational amplifier and peripheral circuit；The voltage signal of linear semiconductor sensor
By the filter of resistance R10 and capacitance C5 compositions, rejection frequency enters the 3 of operational amplifier after the AC signal more than 15Hz
Foot, 4 feet of operational amplifier and 1 foot short circuit form voltage follower with stabilization signal, and the signal after stablizing passes through resistance
R11 enters central processing module.
Preferably, the electrochemical sensor has tri- electrodes of CE, RE, WE；The Signal-regulated kinase includes one
Preamplifier and peripheral circuit；1 foot of preamplifier is digitally DGND, is connected to GND, and 2 feet are that module enables foot, low electricity
It is flat effective, it is connected to GND, 3 feet and 4 feet are IIC interfaces, 3.3V are pulled upward to by two resistance R1 and R2, with central processing mould
Block corresponds to foot connection, and 5 feet are the unsettled pin, and 6 feet are power vd D, are connected to 3.3V, and 7 feet are simulation ground AGND, is connected to GND, and 8
Foot is that analog voltage exports VOUT, is connected to central processing module, and 9 feet and 10 feet are filter foot, parallel resistance R5 and capacitance
C3 forms filter, and 11 feet are reference voltage input pin Vref, connect 2.5V, and 12 foot, 13 foot, 14 foot is sensor foot, is connected respectively
WE, RE and CE foot of electrochemical sensor are connect, 15 feet are connected to GND, and capacitance C4A and C4B are the power filter of U3, junction type field effect
Should pipe Q1 be connected when power is off, RE the and WE feet of short circuit electrochemical sensor are to protect sensor.
Preferably, the output module includes RS485 transceiving chips, 5 feet connection logically GND, and 8 feet connect 5V, and 1
Foot is data output pin, and toggle switch SW1 connects central processing module with resistance R31, and 2 feet and 3 feet are transmitting-receiving control foot, are passed through
Resistance R33 is connected to central processing module, and 4 feet are data input pin, and centre is connected with resistance R32 by toggle switch SW1
Module is managed, 6 feet are the A+ signals of RS485, the A of RS485 buses are connected to by resistance R35 and fuse PTC2,7 feet are
The B- signals of RS485 are connected to the B of RS485 buses by resistance R34 and fuse PTC3.
Preferably, the output module includes two lines bus transceiving chip, and 1 foot is that power supply VCC meets 3.3V, and 8 feet are electricity
Source GND meets GND, and 2 feet are that data send foot, connect central processing module by toggle switch SW1 and resistance R31,3 feet connect for data
Foot is received, central processing module is connect by toggle switch SW1 and resistance R32,4 feet are the unsettled pin, and 5 feet are that 2 buses send foot, are passed through
The turn-on and turn-off of resistance R3 control triodes Q1 pass through electric current to control resistance R4 sourcing currents between power supply positive and negative
Circumferential bus transmission data, 6 feet are that two lines bus receives foot PI, and resistance R1 and R2 are connected across between 24V and GND, and PI acquires resistance
The partial pressure of R2 receives the data from two lines bus.
Preferably, the human-machine interface module includes importation and output par, c；The importation includes infrared
Remote-controlled chip, receives remote controller signal and coding is sent to central processing module；The output par, c includes a dot matrix OLED
With three Light-emitting diode LED 2, LED3, LED4, three light emitting diodes indicate respectively power supply, alarm, the failure shape of detector
State；When detector is powered on, LED2 is with the frequency scintillation of 1Hz, and when concentration is more than the alarm threshold value of setting, LED3 is always on,
When concentration be less than setting alarm threshold value when, LED3 often goes out, when detector sensor in the event of failure, LED4 is always on, and works as detection
When the sensor fault-free of device, LED4 often goes out.
Preferably, further include boost chip, the 3.3V of input is boosted to 14V to power to dot matrix OLED；Boost chip 5
Foot is input pin, connects 3.3V, and 4 feet are enabled foot, is connected to 3.3V, and 1 foot is switch output pin, and 2 feet are feedback foot, are connected to
GND, 3 feet are GND feet, are connected to the bleeder circuit being made of resistance R3 and R4.
Preferably, the power conversion module includes power conversion chip and peripheral circuit；Power conversion chip will
DC24V power supplys are converted into DC5V power supplys, and 4 feet are grounding leg, connect GND, and 2 feet are input pin, connect 24V power supplys, and 6 feet are to make
Energy foot, the 24V power supply vin of input are connected to by a resistance R5, and when the foot connects high point usually, chip starts voltage and turns
It changes；3 feet are output pin, export a pwm voltage, and by the filtering of L4 and C7A, C7B, pulsewidth voltage becomes stable
Voltage, 8 feet are feedback foot, the partial pressure of resistance R9 and R10 are received, for controlling output voltage stabilization in 5V；Further include linear steady
Chip to be pressed, DC5V power supplys are converted into DC3.3V power supplys, 1 foot is grounding leg, is connected to logically GND, and 3 feet are input pin,
DC5V power supplys are connected, 2 feet are output pin, connect 3.3V power supplys.
Advantageous effect of the present invention：
Communication modes of the present invention support RS485 buses and two lines bus, two kinds of communication buses to only take up the serial ports of a microcontroller, lead to
Cross toggle switch switching bus form.Leakage, explosion hazard, the vulcanization of the heavy oil volatilization gas such as crude oil, diesel oil are detected simultaneously
3 characteristics of hydrogen concentration.
The present invention replaces traditional combustible gas probe and hydrogen sulfide detector, increases leakage detection function, to being easy
The equipment such as pipeline, the storage tank of leakage are measured in real time, and reach 1ppm to the detection sensitivity of oil gas with cheap cost realization,
To detection orientation 1%LEL ~ 100%LEL of flammable gas explosion danger, to the detection range of hydrogen sulfide in 0-100ppm.
The beneficial effects of the invention are as follows：Communication modes of the present invention support RS485 buses and two lines bus, and two kinds of communication buses are only
The serial ports for occupying a microcontroller, switches bus form by toggle switch.Detect the heavy oil volatilization gas such as crude oil, diesel oil simultaneously
Leakage, explosion hazard, 3 characteristics of concentration of hydrogen sulfide.
The present invention replaces traditional combustible gas probe and hydrogen sulfide detector, increases leakage detection function, to being easy
The equipment such as pipeline, the storage tank of leakage are measured in real time, and reach 1ppm to the detection sensitivity of oil gas with cheap cost realization,
To detection orientation 1%LEL ~ 100%LEL of flammable gas explosion danger, to the detection range of hydrogen sulfide in 0-100ppm.
Description of the drawings
Below according to drawings and examples, the present invention is further described.
Fig. 1 is the structural principle block diagram of the present invention；
Fig. 2 is the central processing module circuit diagram of the present invention；
Fig. 3 is the power conversion module circuit diagram of the present invention；
Fig. 4 is the output module circuit diagram of the present invention；
Fig. 5 is the infrared sensor circuit diagram of the present invention；
Fig. 6 is the linear semiconductor sensor and Signal-regulated kinase circuit diagram of the present invention；
Fig. 7 is the electrochemical sensor and Signal-regulated kinase circuit diagram of the present invention；
Fig. 8 is the human-machine interface module circuit diagram of the present invention；
Fig. 9 is the connected auxiliary circuit figure of the central processing module of the present invention.
Specific implementation mode
Below in conjunction with attached drawing, by specific embodiment, the present invention is further illustrated.
As shown in Figure 1, a kind of three-in-one gas detector based on bussing technique, including：Central processing module, input mould
Block, output module, human-machine interface module, power conversion module and Signal-regulated kinase；
Central processing module is made of microcontroller and its minimum system circuit；Input module and central processing module input terminal phase
Even, the electric signal of reception is inputed into central processing module；Output module is connected with central processing module output end, can will in
The TTL signal of centre processing module output is converted into RS485 signals and is output to outside detector, and can also receive from outside
Two lines bus signal；Human-machine interface module is connected with central processing module, for show oil gas, fuel gas, hydrogen sulfide it is dense
Degree and alarm, fault message；Input voltage is converted to predeterminated voltage by power conversion module, is all module for power supply of detector.
The input module includes linear semiconductor sensor, infrared sensor and electrochemical sensor；Wherein,
Gas concentration is converted into voltage signal by linear semiconductor sensor, and center is conveyed to again after being conveyed to Signal-regulated kinase
Processing module；Combustable gas concentration is converted into digital signal by infrared sensor, is conveyed to central processing module；Electrochemistry passes
Concentration of hydrogen sulfide is converted into current signal by sensor, and central processing module is conveyed to again after being conveyed to Signal-regulated kinase.
Concrete scheme is as follows：
As shown in figure 3, chip U1 is power conversion chip, effect is that DC24V power supplys are converted into DC5V power supplys, 4 feet of U1
For grounding leg, it is connected to logically GND, 2 feet of U1 are input pin, connect 24V power supplys, 6 feet of U1 are enabled foot, pass through one
Resistance R5 is connected to the 24V power supply vin of input, and when the foot connects high point usually, chip starts voltage conversion.3 feet of U1 are defeated
Go out foot, exports a pwm voltage, by the filtering of L4 and C7A, C7B, pulsewidth voltage becomes stable voltage, and the 8 of U1
Foot is feedback foot, the partial pressure of resistance R9 and R10 is received, for controlling output voltage stabilization in 5V.
Chip U2 is linear stabilized power supply, and effect is that DC5V power supplys are converted into DC3.3V power supplys, and 1 foot of U2 is ground connection
Foot is connected to logically GND, and 3 feet of U2 are input pin, connects DC5V power supplys, 2 feet of U2 are output pin, connect 3.3V power supplys.
As shown in Fig. 2, Fig. 9, it is made of a microcontroller U3 and its minimum system circuit.It is a kind of based on bussing technique
The nucleus module of three-in-one gas detector, simulation, digital signal for receiving the input of other modules, output simulation, number
Signal, and control human-machine interface module.Central processing module is responsible for linearization process and zero to semiconductor sensor signal
Follow processing, central processing module is by signal subsection algorithm, inquiring arithmetic and integral algorithm by the signal of semiconductor transducer
Linearization process is carried out, central processing module carries out dynamic following by differential algorithm to the zero of semiconductor transducer.
Central processing module is communicated by serial ports and infrared sensor, reads the combustible gas that infrared sensor measurement obtains
Bulk concentration value sends zero adjusting and calibration command to infrared sensor.
Central processing module is communicated by iic bus and the preamplifier of advance signal conditioning module, is put before configuring
The parameter of big device, the concentration information of hydrogen sulfide is acquired by 12bitADC built in microcontroller.
Central processing unit is communicated by iic bus and EEPROM, reads and writees the zero of linear semiconductor sensor
And calibration parameter, read and write the zero and calibration parameter of electrochemical sensor.
As shown in figure 5, infrared sensor MH440D, shares 5 pins, 2 foot VCC and 1 foot GND are power pins, even
5V_sensor and GND are met, 3 foot RXD and 5 foot TXD are serial ports, are connected with the serial ports TX2 and RX2 of microcontroller, microcontroller passes through string
Mouth reads the concentration data of infrared sensor, and 4 foot Vout are voltage output pin, and the present invention does not use.
As shown in fig. 6, linear semiconductor sensor uses BDT chips, 1 foot to meet 5V, 3 feet meet GND, and 2 feet are that signal is defeated
Go out；Signal-regulated kinase includes an operational amplifier U4 and peripheral circuit；The voltage signal of linear semiconductor sensor passes through
The filter of resistance R10 and capacitance C5 compositions, rejection frequency enter 3 feet of operational amplifier after the AC signal more than 15Hz,
4 feet of operational amplifier and 1 foot short circuit, form voltage follower with stabilization signal, the signal after stablizing by resistance R11 into
Enter the ADC feet ADND of microcontroller.
U2 is EEPROM, zero data and calibration data for storing linear semiconductor sensor, and 1 foot, 2 foot, 3 foot is ground
Location foot is all connected to GND, and 4 feet are power ground vss, is connected to GND, 5 feet and 6 feet are IIC interfaces, are connected to microcontroller
Corresponding pin, 7 feet are enabled foot, are connected to GND, and 8 feet are supply pin, are connected to 3.3V.
As shown in fig. 7, electrochemical sensor has tri- electrodes of CE, RE, WE；Signal-regulated kinase includes a preposition amplification
Device U3 and peripheral circuit；1 foot of preamplifier is digitally DGND, is connected to GND, and 2 feet are that module enables foot, and low level has
Effect, is connected to GND, and 3 feet and 4 feet are IIC interfaces, and 3.3V is pulled upward to by two resistance R1 and R2, and foot corresponding with microcontroller connects
It connects, 5 feet are the unsettled pin, and 6 feet are power vd D, are connected to 3.3V, and 7 feet are simulation ground AGND, are connected to GND, and 8 feet are simulation electricity
Pressure output VOUT is connected to the ADC input AD_1 of microcontroller, and 9 feet and 10 feet are filter foot, parallel resistance R5 and capacitance C3 groups
At filter, 11 feet are reference voltage input pin Vref, connect 2.5V, and 12 foot, 13 foot, 14 foot is sensor foot, is separately connected electricity
WE, RE and CE foot of chemical sensor, 15 feet are connected to GND, and capacitance C4A and C4B are the power filter of U3, technotron
Q1 is connected when power is off, RE the and WE feet of short circuit electrochemical sensor are to protect sensor.
U2 is EEPROM, zero data and calibration data for storing electrochemical sensor, and 1 foot, 2 foot, 3 foot is address
Foot is all connected to GND, and 4 feet are power ground vss, is connected to GND, 5 feet and 6 feet are IIC interfaces, are connected to pair of microcontroller
It is enabled foot to answer pin, 7 feet, is connected to GND, and 8 feet are supply pin, are connected to 3.3V.
U1 is linear voltage regulator, and reference voltage is provided to preamplifier U3 for the 5V of input to be converted into 2.5V.2 feet
For logically GND, 4 feet input for 5V, and 3 feet are enabled foot, and 5V can be converted into 2.5V by U1 when being high level, and 5 feet are 2.5V
Output.
As shown in figure 4, chip U4 is RS485 transceiving chips, for receiving from external RS485 signals, it is converted into TTL
The TTL signal that microcontroller exports can be converted into outside the detector of RS485 signals output by signal to microcontroller.U4
8 feet of the connection of 5 feet logically GND, U4 connect 5V, 1 foot of U4 is data output pin, and toggle switch SW1 is connected with resistance R31
The RX1 feet of microcontroller, 2 feet and 3 feet of U4 are transmitting-receiving control foot, are connected to the FX485 feet of microcontroller by resistance R33, the 4 of U4
Foot is data input pin, connects the TX1 feet of microcontroller with resistance R32 by toggle switch SW1, and the A+ that 6 feet of U4 are RS485 believes
Number, the A of RS485 buses is connected to by resistance R35 and fuse PTC2,7 feet of U4 are the B- signals of RS485, pass through resistance
R34 and fuse PTC3 is connected to the B of RS485 buses.
Chip U5 is two lines bus transceiving chip, and for receiving from external two lines bus signal, 1 foot is that power supply VCC connects
3.3V, 8 feet are that power supply GND meets GND, and 2 feet are that data send foot, and the RX1 of microcontroller is met by toggle switch SW1 and resistance R31,
3 feet are data receiver foot, and the TX1 of microcontroller is met by toggle switch SW1 and resistance R32, and 4 feet are the unsettled pin, and 5 feet are two lines bus
Foot is sent, the conducting of triode Q1 is controlled by resistance R3 and closes section, electricity is drawn to control resistance R4 between power supply positive and negative
Stream, by electric current circumferential direction bus transmission data, 6 feet are that 2 buses receive foot PI, and resistance R1 and R2 are connected across between 24V and GND,
The partial pressure that PI acquires resistance R2 receives the data from two lines bus.
As shown in figure 8, connector JP1 is connected with power panel, effect is to obtain the power supply and control signal of power panel.
U1 is the boost chip of human-machine interface module, and the 3.3V of input is boosted to 14V to power to OLED.5 feet are input
Foot connects 3.3V, and 4 feet are enabled foot, is connected to 3.3V, and 1 foot is switch output pin, and 2 feet are feedback foot, are connected to GND, 3 feet
For GND feet, it is connected to the bleeder circuit being made of resistance R3 and R4.
U2 is infrared receiver, the signal for receiving remote controler, and sends remote signal to list by coding rule
Piece machine.1 foot of U2 connects 3.3V, and 2 feet of U2 connect GND, and 3 feet of U2 are output pin.
LED2, LED3, LED4 are light emitting diode, indicate respectively the power supply of detector, alarm, malfunction.Detector
When being powered on, LED2 is with the frequency scintillation of 1Hz, and when concentration is more than the alarm threshold value of setting, LED3 is always on, when concentration is less than
When the alarm threshold value of setting, LED3 often goes out, when detector sensor in the event of failure, LED4 is always on, when the sensor of detector
When fault-free, LED4 often goes out.
JP2 connections are OLED, 1 foot, 2 feet, 3 feet, 4 feet, 7 feet, 8 feet, 16 feet, 17 feet, 18 feet, 19 feet, 20 feet, 24 feet
It is connected to GND entirely.5 feet are VDD, meet 3.3V, 6 feet are grounded by resistance R10, and 9 feet, 10 feet, 13 feet, 14 feet combine use
Make spi bus, is connected to the corresponding foot of microcontroller.21 feet, 22 feet, 23 feet, 24 feet are OLED luminous tube power supplys, and 23 feet are connected to
14V。
Communication modes of the present invention support RS485 buses and two lines bus, two kinds of communication buses to only take up the string of a microcontroller
Mouthful, bus form is switched by toggle switch.Detect simultaneously the leakage of the heavy oil volatilization gas such as crude oil, diesel oil, explosion hazard,
3 characteristics of concentration of hydrogen sulfide.
The present invention replaces traditional combustible gas probe and hydrogen sulfide detector, increases leakage detection function, to being easy
The equipment such as pipeline, the storage tank of leakage are measured in real time, and reach 1ppm to the detection sensitivity of oil gas with cheap cost realization,
To detection orientation 1%LEL ~ 100%LEL of flammable gas explosion danger, to the detection range of hydrogen sulfide in 0-100ppm.
Present invention employs the leakage of the heavy oil volatilization gas such as semiconductor linear technology detection crude oil, diesel oil, principle is：
Linearization calculation is carried out to the parabolic signal of semiconductor transducer output, parabolic signal is converted into linear type signal.It will
Parabola is divided into two parts, and first part's approximately linear converts thereof into linear signal by look-up table, and second part is integral
Curve, by calculating to the linear signal of the Integral Transformation of time.
Solves semiconductor transducer zero instability problem.The micro- of seeking time is changed to the sensor signal of zero crossings
Point, a threshold value is set to differential, differential value is more than the signal of the threshold value, carries out concentration calculating, and differential value is less than the letter of the threshold value
Number, concentration value indirect assignment is 0, while zero value is adjusted to new signal value, and the zero that dynamic tracks semiconductor transducer becomes
Change, to ensure under the premise of the jitter of semiconductor transducer, detector keeps zero point stability.
It the above is only the preferred embodiment of the present invention, it should be pointed out that：Those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of three-in-one gas detector based on bussing technique, which is characterized in that including：Central processing module；With center
The connected input module of processing module input terminal, central processing module is inputed to by the electric signal of reception；With central processing module
The connected output module of output end, the signal that central processing module exports is output to outside detector, and is received from outer
The signal in portion；The human-machine interface module being connected with central processing module shows gas concentration and alarm, fault message；And it is
The power conversion module of all module for power supply.
2. the three-in-one gas detector according to claim 1 based on bussing technique, which is characterized in that the input mould
Block includes：
Gas concentration is converted into voltage signal, is conveyed to centre again after Signal-regulated kinase by linear semiconductor sensor
Manage module；
Combustable gas concentration is converted into digital signal, is conveyed to central processing module by infrared sensor；
And electrochemical sensor, concentration of hydrogen sulfide is converted into current signal, is conveyed to center again after Signal-regulated kinase
Processing module.
3. the three-in-one gas detector according to claim 2 based on bussing technique, it is characterised in that：The infrared ray
Sensor uses MH440D chips, shares 5 pins, and 2 foot VCC and 1 foot GND are power pins, connection 5V_sensor and
GND, 3 foot RXD and 5 foot TXD are that serial ports is connected with central processing module, and central processing module reads infrared ray sensing by serial ports
The concentration data of device.
4. the three-in-one gas detector according to claim 2 based on bussing technique, it is characterised in that：Described linear half
Conductor sensor uses BDT chips, 1 foot to meet 5V, and 3 feet meet GND, and 2 feet export for signal；
The Signal-regulated kinase includes operational amplifier and peripheral circuit；
The voltage signal of 2 foot of linear semiconductor sensor filters out frequency by the filter of resistance R10 and capacitance C5 compositions
Rate enters 3 feet of operational amplifier, 4 feet of operational amplifier and 1 foot short circuit after the AC signal more than 15Hz, form voltage
For follower with stabilization signal, the signal after stablizing enters central processing module by resistance R11.
5. the three-in-one gas detector according to claim 2 based on bussing technique, it is characterised in that：The electrochemistry
Sensor has tri- electrodes of CE, RE, WE；
The Signal-regulated kinase includes a preamplifier and peripheral circuit；1 foot of preamplifier is digitally DGND, even
It is connected to GND, 2 feet are that module enables foot, and low level is effective, is connected to GND, and 3 feet and 4 feet are IIC interfaces, pass through two resistance R1
It is pulled upward to 3.3V with R2, the connection of corresponding with central processing module foot, 5 feet are the unsettled pin, and 6 feet are that power vd D is connected to 3.3V, 7
Foot is that simulation ground AGND is connected to GND, and 8 feet are that analog voltage exports VOUT, is connected to central processing module, and 9 feet and 10 feet are
Filter foot parallel resistance R5 and capacitance C3 forms filter, and 11 feet are reference voltage input pin Vref, connect 2.5V, 12 feet 13
Foot and 14 feet are sensor foot, are separately connected WE, RE and CE foot of electrochemical sensor, and 15 feet are connected to GND, capacitance C4A and
C4B is the power filter of U3, and technotron Q1 is connected when power is off, RE the and WE feet of short circuit electrochemical sensor are to protect
Sensor.
6. the three-in-one gas detector according to claim 1 based on bussing technique, it is characterised in that：The output mould
Block includes RS485 transceiving chips, and logically GND, 8 feet connect 5V to the connection of 5 feet, and 1 foot is data output pin, toggle switch SW1
Central processing module is connected with resistance R31,2 feet and 3 feet are transmitting-receiving control foot, and central processing module is connected to by resistance R33,
4 feet are data input pin, and central processing module is connected with resistance R32 by toggle switch SW1, and 6 feet are the A+ signals of RS485,
The A of RS485 buses is connected to by resistance R35 and fuse PTC2,7 feet are the B- signals of RS485, pass through resistance R34 and guarantor
Dangerous silk PTC3 is connected to the B of RS485 buses.
7. the three-in-one gas detector according to claim 1 based on bussing technique, it is characterised in that：The output mould
Block further includes two lines bus transceiving chip, and 1 foot is that power supply VCC meets 3.3V, and 8 feet are that power supply GND meets GND, and 2 feet send for data
Foot connects central processing module by toggle switch SW1 and resistance R31, and 3 feet are data receiver foot, pass through toggle switch SW1 and electricity
Resistance R32 connects central processing module, and 4 feet are the unsettled pin, and 5 feet are that two lines bus sends foot, and leading for triode Q1 is controlled by resistance R3
Logical and shutdown, to control resistance R4 sourcing currents between power supply positive and negative, by electric current circumferential direction bus transmission data, 6 feet are 2
Bus receives foot PI, and resistance R1 and R2 are connected across between 24V and GND, and the partial pressure that PI acquires resistance R2 is received from two lines bus
Data.
8. the three-in-one gas detector according to claim 1 based on bussing technique, it is characterised in that：The human-machine interface
Mouth mold block includes importation and output par, c；
The importation includes infrared remote control chip, receives remote controller signal and coding is sent to central processing module；
The output par, c includes a dot matrix OLED and three Light-emitting diode LED 2, LED3, LED4, three light emitting diodes
Indicate respectively power supply, alarm and the malfunction of detector；
When detector is powered on, LED2 is with the frequency scintillation of 1Hz, and when concentration is more than the alarm threshold value of setting, LED3 is always on,
When concentration be less than setting alarm threshold value when, LED3 often goes out, when detector sensor in the event of failure, LED4 is always on, and works as detection
When the sensor fault-free of device, LED4 often goes out.
9. the three-in-one gas detector according to claim 8 based on bussing technique, it is characterised in that：It further include boosting
The 3.3V of input is boosted to 14V and powered to dot matrix OLED by chip；
5 foot of boost chip is input pin, connects 3.3V, and 4 feet are enabled foot, is connected to 3.3V, and 1 foot is switch output pin, and 2 feet are
Foot is fed back, GND is connected to, 3 feet are GND feet, are connected to the bleeder circuit being made of resistance R3 and R4.
10. the three-in-one gas detector according to claim 1 based on bussing technique, it is characterised in that：
The power conversion module includes power conversion chip and peripheral circuit；
DC24V power supplys are converted into DC5V power supplys by power conversion chip, and 4 feet are grounding leg, connect GND, and 2 feet are input pin,
24V power supplys are connected, 6 feet are enabled foot, and the 24V power supply vin of input are connected to by a resistance R5, when foot connection high point is flat
When, chip starts voltage conversion；3 feet are output pin, a pwm voltage are exported, by the filtering of L4 and C7A, C7B, arteries and veins
Width funtion becomes stable voltage, and 8 feet are feedback foot, receive the partial pressure of resistance R9 and R10, exist for controlling output voltage stabilization
5V；
Further include linear regulator chip, DC5V power supplys is converted into DC3.3V power supplys, 1 foot is grounding leg, is connected to logically
GND, 3 feet are input pin, connect DC5V power supplys, and 2 feet are output pin, connect 3.3V power supplys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810214822.8A CN108469457A (en) | 2018-03-15 | 2018-03-15 | Three-in-one gas detector based on bussing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810214822.8A CN108469457A (en) | 2018-03-15 | 2018-03-15 | Three-in-one gas detector based on bussing technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108469457A true CN108469457A (en) | 2018-08-31 |
Family
ID=63265458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810214822.8A Pending CN108469457A (en) | 2018-03-15 | 2018-03-15 | Three-in-one gas detector based on bussing technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108469457A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233383A (en) * | 2020-07-15 | 2021-01-15 | 南京理工大学 | Double-detector self-diagnosis gas monitoring system based on Internet of things |
| CN112504460A (en) * | 2020-07-30 | 2021-03-16 | 河南科技大学 | Electronic temperature measuring box integrating harmful gas detection function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011010320A (en) * | 2002-10-18 | 2011-01-13 | Zed I Solutions (Canada) Inc | System for acquiring data from facility and method |
| CN201741271U (en) * | 2010-03-24 | 2011-02-09 | 宇星科技发展(深圳)有限公司 | Multifunctional data acquisition module |
| CN203008972U (en) * | 2012-12-07 | 2013-06-19 | 天地（常州）自动化股份有限公司 | Mining multi-parameter collector |
| CN203190993U (en) * | 2013-02-25 | 2013-09-11 | 长春东煤机电研究所 | Multi-parameter sensor used in risk avoiding chamber |
| CN106093152A (en) * | 2016-08-01 | 2016-11-09 | 苏州优谱德精密仪器科技有限公司 | Gas-detecting device |
| CN107290391A (en) * | 2017-07-25 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of hydrocarbon exploration device and detection method based on linear semiconductor |
-
2018
- 2018-03-15 CN CN201810214822.8A patent/CN108469457A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011010320A (en) * | 2002-10-18 | 2011-01-13 | Zed I Solutions (Canada) Inc | System for acquiring data from facility and method |
| CN201741271U (en) * | 2010-03-24 | 2011-02-09 | 宇星科技发展(深圳)有限公司 | Multifunctional data acquisition module |
| CN203008972U (en) * | 2012-12-07 | 2013-06-19 | 天地（常州）自动化股份有限公司 | Mining multi-parameter collector |
| CN203190993U (en) * | 2013-02-25 | 2013-09-11 | 长春东煤机电研究所 | Multi-parameter sensor used in risk avoiding chamber |
| CN106093152A (en) * | 2016-08-01 | 2016-11-09 | 苏州优谱德精密仪器科技有限公司 | Gas-detecting device |
| CN107290391A (en) * | 2017-07-25 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of hydrocarbon exploration device and detection method based on linear semiconductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233383A (en) * | 2020-07-15 | 2021-01-15 | 南京理工大学 | Double-detector self-diagnosis gas monitoring system based on Internet of things |
| CN112233383B (en) * | 2020-07-15 | 2024-02-13 | 南京理工大学 | Dual-detector self-diagnosis gas monitoring system based on Internet of things |
| CN112504460A (en) * | 2020-07-30 | 2021-03-16 | 河南科技大学 | Electronic temperature measuring box integrating harmful gas detection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104333364A (en) | AC solid state relay and fault detecting method of load circuit of same | |
| CN102802315A (en) | Wireless intelligent LED (Light-Emitting Diode) streetlight control system | |
| CN108469457A (en) | Three-in-one gas detector based on bussing technique | |
| CN204557709U (en) | A kind of safety early warning device | |
| CN109001566A (en) | A kind of intelligent warning board for transformer substations | |
| CN201885989U (en) | Combustible gas detector | |
| CN205407211U (en) | Dual electric device controller | |
| CN201813072U (en) | Wireless sensor network measure and control device for prefabricated substations | |
| CN209372740U (en) | Fuel gas detection system | |
| CN204492881U (en) | A kind of mine anti-explosion coal bunker gas automatic-discharging control device | |
| CN201065769Y (en) | Mine dust on-line monitoring and controlling system | |
| CN201945994U (en) | Multipurpose intelligent serial port controller | |
| CN108417002A (en) | A kind of high-performance MBUS collectors for water meter | |
| CN105632151A (en) | Industry on-site digital signal transmission method | |
| CN205484643U (en) | Distribution network low pressure fault monitoring device | |
| CN102176181B (en) | A kind of constant current source power supply circuit of Point type optical smoke detector | |
| CN103712686A (en) | Light intensity detecting device | |
| CN204650322U (en) | A kind of high-tension switch cabinet temperature and humidity control system | |
| CN101183130B (en) | Control method of Busch lemniscate yarn cutting testing apparatus | |
| CN206002910U (en) | " ia " grade mining intrinsic safety type controller | |
| CN205068672U (en) | Fire detector | |
| CN104632273A (en) | Mining anti-explosion coal bunker gas automatic emission control device | |
| CN204357486U (en) | A kind of Mine Methane supervising device | |
| CN202255640U (en) | Temperature monitoring system for power transmission line drainage joint | |
| CN207165011U (en) | A kind of new traffic signalization state monitoring apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180831 |