CN108597192A - A kind of versatile fuel gas detecting system based on NB-IOT Internet of Things - Google Patents
A kind of versatile fuel gas detecting system based on NB-IOT Internet of Things Download PDFInfo
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- CN108597192A CN108597192A CN201810229645.0A CN201810229645A CN108597192A CN 108597192 A CN108597192 A CN 108597192A CN 201810229645 A CN201810229645 A CN 201810229645A CN 108597192 A CN108597192 A CN 108597192A
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- fuel gas
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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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
- G08B25/08—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 using communication transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention discloses a kind of versatile fuel gas detecting systems based on NB IOT Internet of Things, including CPU module, communication module, SIM card module, fuel gas detection module, communication module, fuel gas detection module connects CPU module, communication module connects SIM card module, the CPU module includes chip U3, the model STM8L151K4T6 of chip U3, communication module includes chip U4A, the model BC95 of chip U4A, SIM card module includes chip U6 and chip U8, the model ESDA6V8AV5 of chip U6, the model MICROSIM clamshells of chip U8, fuel gas detection module includes chip U7, the model TGS2611 of chip U7.It has the following advantages：Small external form volume design, high reliability and remarkable long-time stability, at low cost, pollution-free, versatile, strong antijamming capability is low in energy consumption, can be compatible with the M35 modules for moving remote communication GSM/GPRS series.
Description
Technical field
The versatile fuel gas detecting system based on NB-IOT Internet of Things that the present invention relates to a kind of belonging to electronics inspection
Measurement equipment technical field.
Background technology
Fuel gas alarm be by detect CO in Air gas concentration whether more than specific concentration come combustion gas
Whether leak, fuel gas alarm currently on the market be all it is single be only capable of alarming in own home, when old man, children are in
In it is extremely dangerous when staying alone.Current remote monitoring has use in the family according to investigations, is by monitor that room information is remote
Journey passes, but remote monitoring is unable to get the case where whether combustion gas leaks.In addition current coal gas detection is also lacked following
Point：
1, poor anti jamming capability, power consumption is big, and application circuit is complicated；
2, sensitivity is low, and flexibility is poor, and accuracy of detection is low, and versatility is not strong, and safety is poor.
3, inconvenience is installed and used, low-response can not be compatible with the M35 modules for moving remote communication GSM/GPRS series.
Invention content
The problem to be solved in the present invention is provided a kind of based on the general of NB-IOT Internet of Things for original technically deficiency
Property strong fuel gas detecting system, the gas intelligent alarm system based on Internet of Things, indoor fuel gas detecting system, small range combustion
Gas information fusion point, the server Trinity are suitable for most inhabitation building, combine closely with Internet of Things knowledge, small
External form volume designs, high reliability and remarkable long-time stability, at low cost, pollution-free, versatile, anti-interference ability
By force, low in energy consumption, the M35 modules for moving remote communication GSM/GPRS series can be compatible with.
To solve the above-mentioned problems, the present invention uses following technical scheme：
A kind of versatile fuel gas detecting system based on NB-IOT Internet of Things, including CPU module, communication module, SIM
Card module, fuel gas detection module, communication module, fuel gas detection module connect CPU module, and communication module connects SIM
Card module, the CPU module include chip U3, and the model STM8L151K4T6 of chip U3, communication module includes chip U4A,
The model BC95 of chip U4A, SIM card module include chip U6 and chip U8, the model ESDA6V8AV5 of chip U6, chip
The model MICROSIM clamshells of U8, fuel gas detection module include chip U7, the model TGS2611 of chip U7.
Further, 2 feet of the chip U3 are connected with the one end crystal oscillator Y1 and the one end capacitance C1, the 3 feet connection of chip U3
There are the crystal oscillator Y1 other ends and the one end capacitance C2, the capacitance C1 other ends and capacitance C2 other ends ground connection；11 feet of the chip U3 connect
It is connected to the one end resistance R1, the resistance R1 other ends are connected with the one end light emitting diode L1, light emitting diode L1 other ends ground connection；Chip
8 feet of U3 access 3.3V power supplys, the 7 feet ground connection of chip U3.
Further, 32 feet of the chip U3 are connected with 2 feet of row needle CON4, and the 1 foot access power supply of row's needle CON4+
The 3 feet ground connection of 3.3V, row's needle CON4,4 feet of row's needle CON4 are connected with the one end capacitance C13, and connect 1 foot of chip U3, capacitance
The C13 other ends are grounded, the external internet ISP1 of row needle CON4；9 feet of the chip U3 are connected with the one end resistance R4, and resistance R4 is another
One end is connected with 3 feet of connector J3, the 2 feet ground connection of connector J3, the 1 foot connection+3.3V power supplys of connector J3.
Further, 15 feet of the chip U4A are connected with the collector of triode Q2, and the base stage of triode Q2 is connected with
The one end resistance R3 and the one end resistance R18, the resistance R3 other ends connect 24 feet of chip U3, the emitter and resistance of triode Q2
The R18 other ends are grounded；53 feet of chip U4A are connected with the one end capacitance C18, the one end resistance R7, and the resistance R7 other ends are connected with electricity
Hold the one end C17, the capacitance C18 other ends, capacitance C17 other ends ground connection；45 feet of chip U4A and 46 feet connection access VBAT voltages
45 feet of power supply, chip U4A are connected with the one end capacitance EC4, the one end capacitance C20, the one end capacitance C21, the one end capacitance C16, capacitance
The EC4 other ends, the capacitance C20 other ends, the capacitance C21 other ends, capacitance C16 other ends ground connection.
Further, 30 feet of the chip U4A are connected with the one end resistance R14, the one end resistance R6, the resistance R14 other ends
27 feet of chip U3 are connected with, the resistance R6 other ends are connected with 2 feet of connector J4, and 29 feet of chip U4A are connected with resistance R15
One end, the one end resistance R5, the resistance R15 other ends are connected with 28 feet of chip U3, and the resistance R5 other ends are connected with the 3 of connector J4
Foot, the 1 foot ground connection of 4 the foot access+3.3V, connector J4 of connector J4, the external COM of connector J4.
Further, 2 feet of the chip U8 are connected with the one end resistance R25, the one end resistance R20 and the one end capacitance C22, electricity
Hold the C22 other ends ground connection, the resistance R25 other ends be connected with the one end capacitance C25, chip U8 5 feet, the resistance R20 other ends connection
There are 40 feet of chip U4A, 38 feet of the 5 feet connection chip U4A of chip U8,42 feet of the 6 feet connection chip U4A of chip U8, core
3 feet of piece U8 are connected with the one end resistance R22 and the one end capacitance C24, capacitance C24 other ends ground connection, and the resistance R22 other ends connect core
1 foot of 39 feet of piece U4A, chip U8 is connected with the one end resistance R21 and the one end capacitance C23, capacitance C23 other ends ground connection, resistance
The R21 other ends connect the 41 of chip U4A.
Further, 1 foot of the 5 feet connection chip U6 of the chip U8,4 feet of the 2 feet connection chip U6 of chip U8, core
3 feet of the 3 feet connection chip U6 of piece U8,5 feet of the 1 foot connection chip U6 of chip U8, the 2 feet ground connection of chip U6.
Further, the combustible gas detection module includes operational amplifier U5A, and 3 feet of operational amplifier U5A are connected with
The one end resistance R11, the one end resistance R12 and the one end capacitance C10, the resistance R12 other ends and capacitance C10 other ends ground connection, resistance R11
8 feet of another termination+5V power supplys, operational amplifier U5A are connected with the one end capacitance C11 and the one end resistance R23, and access+5V electricity
Source, capacitance C11 other ends ground connection, 1 foot of operational amplifier U5A are connected with the one end capacitance C12, the one end light emitting diode L2 and core
12 feet of piece U3, the one end light emitting diode L2 connect the resistance R23 other ends, capacitance C12 other ends ground connection.
Further, 3 feet of the chip U7 and 4 feet connect access+5V power supplys, and 4 feet of chip U7 are connected with capacitance C15
One end, the one end capacitance EC3, the capacitance C15 other ends, capacitance EC3 other ends ground connection.
Further, 1 foot of the chip U7 is connected with the one end resistance R24, and the resistance R24 other ends are grounded, and the 2 of chip U7
Foot is connected with 2 feet of the one end resistance R26 and operational amplifier, and the resistance R26 other ends are connected with the one end resistance R27 and capacitance C26
One end, the resistance R27 other ends and capacitance C26 other ends ground connection.
The present invention is had the following technical effect that compared with prior art using above technical scheme：
1, gas intelligent alarm system of the fuel gas detecting system of the present invention based on Internet of Things, indoor fuel gas detection system
System, small range combustion gas information fusion point, the server Trinity, the intelligent integral concept often mentioned with present sciemtifec and technical sphere are complete
Meet entirely, is suitable for most inhabitation building, which combines closely with Internet of Things knowledge, in line with the lives and properties for people
The theory to provide safeguard, it is at low cost, pollution-free, it is versatile, it is safe.
2, fuel gas detecting system strong antijamming capability, low in energy consumption, small, long lifespan, application circuit is simple, sensitive
Degree is high, and flexibility is good, and accuracy of detection is high.
3, the communication module has high reliability and remarkable long-time stability, small external form volume design, peace
Dress is convenient, and fast response time can meet the needs of terminal device is to small-sized module product, simultaneously effective subtract to the maximum extent
Small air detection system size simultaneously optimizes production cost, can be compatible with the M35 modules for moving remote communication GSM/GPRS series.
4, the CPU module long-term working stability is high, is hardly damaged, failure rate is low.
The present invention is described in detail with reference to the accompanying drawings and examples.
Description of the drawings
Attached drawing 1 is the circuit diagram of CPU module in the embodiment of the present invention；
Attached drawing 2 is the circuit diagram of communication module in the embodiment of the present invention；
Attached drawing 3 is the circuit diagram of SIM card module in the embodiment of the present invention；
Attached drawing 4 is the circuit diagram of clock module in the embodiment of the present invention；
Attached drawing 5 is the circuit diagram of fuel gas detection module in the embodiment of the present invention；
Attached drawing 6 is the circuit diagram of power module in the embodiment of the present invention.
Specific implementation mode
Embodiment 1, as shown in Figure 1 to Figure 3, a kind of versatile fuel gas detection system based on NB-IOT Internet of Things
System, including CPU module, communication module, SIM card module, power module, fuel gas detection module, clock module communicate mould
Block, fuel gas detection module, clock module connect CPU module, and communication module connects SIM card module, and power module is each mould
Block provides power supply.
The CPU module includes chip U3, and 2 feet of the model STM8L151K4T6 of chip U3, chip U3 are connected with crystalline substance
Shake the one end Y1 and the one end capacitance C1, and 3 feet of chip U3 are connected with the crystal oscillator Y1 other ends and the one end capacitance C2, the capacitance C1 other ends and
The capacitance C2 other ends are grounded.
32 feet of the chip U3 are connected with 2 feet of row's needle CON4, and 1 foot of row's needle CON4 accesses power supply+3.3V, arranges needle
3 feet of CON4 are grounded, and 4 feet of row's needle CON4 are connected with the one end capacitance C13, and connect 1 foot of chip U3, the capacitance C13 other ends
Ground connection, the external internet ISP1 of row needle CON4；9 feet of the chip U3 are connected with the one end resistance R4, the connection of the resistance R4 other ends
There are 3 feet of connector J3, the 2 feet ground connection of connector J3, the 1 foot connection+3.3V power supplys of connector J3；11 feet of the chip U3
It is connected with the one end resistance R1, the resistance R1 other ends are connected with the one end light emitting diode L1, light emitting diode L1 other ends ground connection；Core
8 feet of piece U3 access 3.3V power supplys, the 7 feet ground connection of chip U3.
The CPU module long-term working stability is high, it can be achieved that continuous 2-3 the operation is stable, fast response time, when corresponding
Between be less than 1 second；Strong antijamming capability is hardly damaged, and failure rate is low, and more current CPU module failure rate reduces by 35% or more.
The communication module includes chip U4A, and the model BC95 of chip U4A, chip U4A are wireless NB chips, chip
15 feet of U4A are connected with the collector of triode Q2, and the base stage of triode Q2 is connected with the one end resistance R3 and the one end resistance R18,
The resistance R3 other ends connect 24 feet of chip U3, emitter and the resistance R18 other ends ground connection of triode Q2；The 53 of chip U4A
Foot is connected with the one end capacitance C18, the one end resistance R7, and the resistance R7 other ends are connected with the one end capacitance C17, the capacitance C18 other ends, electricity
Hold C17 other ends ground connection；45 feet of chip U4A and 46 feet connection access VBAT voltage sources, 45 feet of chip U4A are connected with electricity
Hold the one end EC4, the one end capacitance C20, the one end capacitance C21, the one end capacitance C16, the capacitance EC4 other ends, the capacitance C20 other ends, electricity
Hold the C21 other ends, capacitance C16 other ends ground connection；30 feet of the chip U4A are connected with the one end resistance R14, the one end resistance R6,
The resistance R14 other ends are connected with 27 feet of chip U3, and the resistance R6 other ends are connected with 2 feet of connector J4,29 feet of chip U4A
It is connected with the one end resistance R15, the one end resistance R5, the resistance R15 other ends are connected with 28 feet of chip U3, the connection of the resistance R5 other ends
There are 3 feet of connector J4, the 1 foot ground connection of 4 the foot access+3.3V, connector J4 of connector J4, the external COM of connector J4.
Long-time stability of the communication module with high reliability with brilliance, super low-power consumption, hypersensitivity are micro-
Small external form volume design, easy for installation, fast response time, strong antijamming capability；Terminal device can be met to the maximum extent to small
The demand of size module product simultaneously effective reduces air detection system size and optimizes production cost, can be compatible with shifting
The M35 modules of remote communication GSM/GPRS series.
The SIM card module includes chip U6 and chip U8, the model ESDA6V8AV5 of chip U6, the model of chip U8
2 feet for MICROSIM clamshells, chip U8 are connected with the one end resistance R25, the one end resistance R20 and the one end capacitance C22, capacitance
The C22 other ends are grounded, the resistance R25 other ends be connected with the one end capacitance C25, chip U8 5 feet, the resistance R20 other ends are connected with
40 feet of chip U4A, 38 feet of the 5 feet connection chip U4A of chip U8,42 feet of the 6 feet connection chip U4A of chip U8, chip
3 feet of U8 are connected with the one end resistance R22 and the one end capacitance C24, capacitance C24 other ends ground connection, and the resistance R22 other ends connect chip
1 foot of 39 feet of U4A, chip U8 is connected with the one end resistance R21 and the one end capacitance C23, capacitance C23 other ends ground connection, resistance R21
The other end connects the 41 of chip U4A.
1 foot of the 5 feet connection chip U6 of the chip U8,4 feet of the 2 feet connection chip U6 of chip U8,3 feet of chip U8
Connect 3 feet of chip U6,5 feet of the 1 foot connection chip U6 of chip U8, the 2 feet ground connection of chip U6.
The clock module includes chip U1, and 1 foot of the model SD3078 of chip U1, chip U1 are connected with resistance R9 mono-
It holds, 19 feet of chip U3, resistance R9 other end access+3.3V power supplys, 2 feet of chip U1 are connected with the one end resistance R8, resistance R8
3 feet of other end access+3.3V power supplys, chip U1 are connected with the one end capacitance C3, the one end capacitance C5, and access+3.3V power supplys, electricity
Hold the C3 other ends, capacitance C5 other ends ground connection, 7 feet of chip U1 are connected with the one end resistance R13, the one end resistance R2, and resistance R13 is another
1 foot of one chip termination U3, another termination+3.3V power supplys of resistance R2,8 feet of chip U1 are connected with the one end resistance R10 and chip
20 feet of U3, resistance R10 other end access+3.3V power supplys.
The clock module stable output signal is high, and for control errors in 0.2%, reliability is high, realizes in room temperature and width
User intervention, the high-precision of full-automatic, full power environment compensation, highly reliable clocking capability are not required in warm range, according to different
Voltage is switched to VBAT from VDD automatically or is switched to VDD from VBAT.
The power module includes chip U2, the 2 feet connection chip U2's of the model MIC29302 of chip U2, chip U2
2 feet of 1 foot, chip U2 are connected with the one end capacitance C6, the one end capacitance EC1, and access+5V power supplys, and+5V power supplys are connected with connector
J2, connector J2 are used for external power supply, the capacitance C6 other ends, capacitance EC1 other ends ground connection, the 3 feet ground connection of chip U2, chip U2
4 feet be connected with the one end resistance R16, the one end resistance R19, the one end capacitance EC2 and the one end capacitance C7, and export VBAT voltages electricity
Source, the resistance R16 other ends are connected with the one end resistance R17, and connect 5 feet of chip U2, resistance R17 other ends ground connection, resistance R19
The other end is connected with the one end light emitting diode L3, and the other end ground connection of light emitting diode L3, the capacitance EC2 other ends, capacitance C7 are another
One end is grounded.
The power module further includes voltage-stablizer Q1, the 3 feet access of the model MCP33 of voltage-stablizer Q1, voltage-stablizer Q1
3 feet of VBAT voltage sources, voltage-stablizer Q1 are connected with the one end capacitance C19, capacitance C19 other ends ground connection, and 2 feet of voltage-stablizer Q1 connect
Ground, the 1 foot output+3.3V voltages of voltage-stablizer Q1,1 foot of voltage-stablizer Q1 are connected with the one end capacitance C14, another terminations of capacitance C14
Ground.
The power module output is stablized, and the different voltages that exportable each module needs, control errors are in 0.2%, reliably
Property it is high, service life is long.
The combustible gas detection module includes operational amplifier U5A, and 3 feet of operational amplifier U5A are connected with resistance R11 mono-
End, the one end resistance R12 and the one end capacitance C10, the resistance R12 other ends and capacitance C10 other ends ground connection, another terminations of resistance R11+
8 feet of 5V power supplys, operational amplifier U5A are connected with the one end capacitance C11 and the one end resistance R23, and access+5V power supplys, capacitance C11
The other end is grounded, and 1 foot of operational amplifier U5A is connected with the 12 of the one end capacitance C12, the one end light emitting diode L2 and chip U3
Foot, the one end light emitting diode L2 connect the resistance R23 other ends, capacitance C12 other ends ground connection.
The fuel gas detection module further includes chip U7, the model TGS2611 of chip U7,3 feet of chip U7 and 4
Foot connects access+5V power supplys, and 4 feet of chip U7 are connected with the one end capacitance C15, the one end capacitance EC3, the capacitance C15 other ends, capacitance
The EC3 other ends are grounded；1 foot of chip U7 is connected with the one end resistance R24, resistance R24 other ends ground connection, the 2 feet connection of chip U7
There are 2 feet of the one end resistance R26 and operational amplifier, the resistance R26 other ends to be connected with the one end resistance R27 and the one end capacitance C26, electricity
Hinder the R27 other ends and capacitance C26 other ends ground connection.
The fuel gas detection module is low in energy consumption, and small, long lifespan, at low cost, application circuit is simple, sensitivity
Height, accuracy of detection is high, and flexibility is good.
Gas intelligent alarm system based on Internet of Things, indoor fuel gas detecting system, small range combustion gas information fusion point, clothes
The business device Trinity, the intelligent integral concept often mentioned with present sciemtifec and technical sphere comply fully with, and are suitable for most inhabitation
Building, the design are combined closely with Internet of Things knowledge, the theory to provide safeguard in line with the lives and properties for people, at low cost, nothing
Pollution, it is versatile, it is safe.
When there is gas leakage, automatic alarm system sound-light alarm in room while, can also pass through NB-IOT modules
The information of gas leakage is passed into NB-IOT platform of internet of things, while being passed at final Property Management of residence and with webpage
Mode intuitively shows, this just constitutes complete Internet of things system, while can also be with short message（Alarm）Form will
Message is sent to corresponding resident family, multiple security is constituted, to reduce unnecessary injury.
The above is the citing of best mode for carrying out the invention, wherein the part that do not address in detail is that this field is common
The common knowledge of technical staff.Protection scope of the present invention is based on the contents of the claims, any technology based on the present invention
The equivalent transformation of enlightenment and progress, also within protection scope of the present invention.
Claims (10)
1. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things, including CPU module, communication module,
SIM card module, fuel gas detection module, communication module, fuel gas detection module connect CPU module, communication module connection
SIM card module, it is characterised in that：The CPU module includes chip U3, the model STM8L151K4T6 of chip U3, communicates mould
Block includes chip U4A, and the model BC95 of chip U4A, SIM card module includes chip U6 and chip U8, the model of chip U6
The model MICROSIM clamshells of ESDA6V8AV5, chip U8, fuel gas detection module include chip U7, the type of chip U7
Number be TGS2611.
2. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：2 feet of the chip U3 are connected with the one end crystal oscillator Y1 and the one end capacitance C1, and it is another that 3 feet of chip U3 are connected with crystal oscillator Y1
One end and the one end capacitance C2, the capacitance C1 other ends and capacitance C2 other ends ground connection；11 feet of the chip U3 are connected with resistance R1
One end, the resistance R1 other ends are connected with the one end light emitting diode L1, light emitting diode L1 other ends ground connection；8 feet of chip U3 connect
Enter 3.3V power supplys, the 7 feet ground connection of chip U3.
3. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：32 feet of the chip U3 are connected with 2 feet of row's needle CON4, and 1 foot of row's needle CON4 accesses power supply+3.3V, arranges needle
3 feet of CON4 are grounded, and 4 feet of row's needle CON4 are connected with the one end capacitance C13, and connect 1 foot of chip U3, the capacitance C13 other ends
Ground connection, the external internet ISP1 of row needle CON4；9 feet of the chip U3 are connected with the one end resistance R4, the connection of the resistance R4 other ends
There are 3 feet of connector J3, the 2 feet ground connection of connector J3, the 1 foot connection+3.3V power supplys of connector J3.
4. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：15 feet of the chip U4A are connected with the collector of triode Q2, and the base stage of triode Q2 is connected with the one end resistance R3
With the one end resistance R18, the resistance R3 other ends connect 24 feet of chip U3, the emitter and another terminations of resistance R18 of triode Q2
Ground；53 feet of chip U4A are connected with the one end capacitance C18, the one end resistance R7, and the resistance R7 other ends are connected with the one end capacitance C17, electricity
Hold the C18 other ends, capacitance C17 other ends ground connection；45 feet of chip U4A and 46 feet connection access VBAT voltage sources, chip U4A
45 feet be connected with the one end capacitance EC4, the one end capacitance C20, the one end capacitance C21, the one end capacitance C16, the capacitance EC4 other ends, electricity
Hold the C20 other ends, the capacitance C21 other ends, capacitance C16 other ends ground connection.
5. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：30 feet of the chip U4A are connected with the one end resistance R14, the one end resistance R6, and the resistance R14 other ends are connected with chip
27 feet of U3, the resistance R6 other ends are connected with 2 feet of connector J4, and 29 feet of chip U4A are connected with the one end resistance R15, resistance
The one end R5, the resistance R15 other ends are connected with 28 feet of chip U3, and the resistance R5 other ends are connected with 3 feet of connector J4, connector
1 foot of 4 the foot access+3.3V, connector J4 of J4 is grounded, the external COM of connector J4.
6. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：It is another that 2 feet of the chip U8 are connected with the one end resistance R25, the one end resistance R20 and the one end capacitance C22, capacitance C22
End ground connection, the resistance R25 other ends be connected with the one end capacitance C25, chip U8 5 feet, the resistance R20 other ends are connected with chip U4A
40 feet, 38 feet of the 5 feet connection chip U4A of chip U8,42 feet of the 6 feet connection chip U4A of chip U8,3 feet of chip U8
It is connected with the one end resistance R22 and the one end capacitance C24, capacitance C24 other ends ground connection, the resistance R22 other ends connect the 39 of chip U4A
1 foot of foot, chip U8 is connected with the one end resistance R21 and the one end capacitance C23, capacitance C23 other ends ground connection, the resistance R21 other ends
Connect the 41 of chip U4A.
7. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：1 foot of the 5 feet connection chip U6 of the chip U8,4 feet of the 2 feet connection chip U6 of chip U8,3 feet of chip U8
Connect 3 feet of chip U6,5 feet of the 1 foot connection chip U6 of chip U8, the 2 feet ground connection of chip U6.
8. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：The combustible gas detection module includes operational amplifier U5A, and 3 feet of operational amplifier U5A are connected with resistance R11 mono-
End, the one end resistance R12 and the one end capacitance C10, the resistance R12 other ends and capacitance C10 other ends ground connection, another terminations of resistance R11+
8 feet of 5V power supplys, operational amplifier U5A are connected with the one end capacitance C11 and the one end resistance R23, and access+5V power supplys, capacitance C11
The other end is grounded, and 1 foot of operational amplifier U5A is connected with the 12 of the one end capacitance C12, the one end light emitting diode L2 and chip U3
Foot, the one end light emitting diode L2 connect the resistance R23 other ends, capacitance C12 other ends ground connection.
9. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：3 feet of the chip U7 and 4 feet connect access+5V power supplys, and 4 feet of chip U7 are connected with the one end capacitance C15, capacitance
The one end EC3, the capacitance C15 other ends, capacitance EC3 other ends ground connection.
10. a kind of versatile fuel gas detecting system based on NB-IOT Internet of Things as described in claim 1, special
Sign is：1 foot of the chip U7 is connected with the one end resistance R24, resistance R24 other ends ground connection, and 2 feet of chip U7 are connected with electricity
2 feet of the one end R26 and operational amplifier are hindered, the resistance R26 other ends are connected with the one end resistance R27 and the one end capacitance C26, resistance
The R27 other ends and capacitance C26 other ends ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Application publication date: 20180928 |