CN209327317U - A kind of low-power consumption methane transducer of remote power-feeding - Google Patents
A kind of low-power consumption methane transducer of remote power-feeding Download PDFInfo
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- CN209327317U CN209327317U CN201822207247.7U CN201822207247U CN209327317U CN 209327317 U CN209327317 U CN 209327317U CN 201822207247 U CN201822207247 U CN 201822207247U CN 209327317 U CN209327317 U CN 209327317U
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Abstract
The utility model discloses a kind of low-power consumption methane transducer of remote power-feeding, controller module is the control centre of entire sensor, is connect respectively with other modules；Power module is used to provide electric energy for entire sensor；Methane transducer interface module is also connect with low-concentration methane catalytic combustion element and high concentration heat conducting element；CAN communication module is also connect with external interface, for connecting acquisition substation, is communicated；Alarm module is for realizing warning function；Terminal resistance monitoring modular is also connect with external terminal resistance, the conduction for terminal resistance signal；Infrared remote control receiving module is for receiving infrared signal；Other sensor interface modules are for acquiring signal and signal being uploaded to control module.The utility model supports remote power-feeding, and an intrinsic safety electric source can connect more sensor devices, transmit anti-interference and real-time report warning message, transient protection when intrinsic safety electric source being avoided to power at a distance.
Description
Technical field
The utility model relates to mine monitoring devices, sense more particularly to a kind of low-power consumption methane of remote power-feeding
Device.
Background technique
Existing mining methane sensor power circuit design uses series voltage stabilizing type power supply and switch currently on the market
Two kinds of type power supply, wherein series voltage stabilizing type power supply there is a problem of transfer efficiency it is low be unsatisfactory for high voltage remote power-feeding to power supply
The requirement of transfer efficiency.And switched-mode power supply circuit is since there are powered on moment impact will cause asking for intrinsic safety electric source power supply protection
Topic has been in turn resulted in when multiple equipment is coupled in intrinsic safety electric source, connects next set again when an equipment has already powered on normal work
The problem of armamentarium can all restart when standby.
Mine sensors mostly use greatly analog frequency signal or RS485 signal to be transmitted at present, but actual application
In due to cable quality, frequency converter interference, sensor and acquire substation mating the problems such as will cause signal anti-interference ability pole
Difference.It often will appear the problems such as emitting big number, false alarm, mating failure, especially problem is particularly acute in remote mating.And
RS485 bus signals although solve the problems, such as rigid interference but due to RS485 bus be based on hypotactic communication modes,
That is inspection can only be carried out by host in a bus and other equipment can only be substation by inspection.This has been resulted in when it
In sense signals equipment the problems such as alarming when will cause must next time poll Shi Caineng report and convert to breath, to cause
The problem of system acting time length.
Catalytic combustion type methane transducer is largely used additionally, due to current mining methane sensor, and is catalyzed burning
Methane transducer power consumption it is larger and be coupled intrinsically safe power supply provide voltage be generally 12V 18V tri- kinds of 24V, especially
It is when starting for the first time since the smaller event starting current of conducting resistance is larger.Sensor remote power-feeding is caused not start normally,
And current coal mining enterprise is caused at present due to the problems such as must realizing remote power-feeding in underground power supply used difficult and digging laneway
Sensor cannot be met the requirements.
According to coal mining enterprise current the problem of being listed above, there is an urgent need to a low-power consumption for being able to solve problem above is remote
The jamproof mining methane sensor of distance power supply.
Utility model content
Purpose of utility model: in order to solve the problems existing in the prior art, one kind is provided and has intrinsic safety power supply protection, anti-interference
Ability is strong, can be with the low-power consumption methane transducer of remote power-feeding.
Technical solution: for achieving the above object, the utility model uses following technical scheme:
A kind of low-power consumption methane transducer of remote power-feeding, including controller module, power module, methane transducer connect
Mouth mold block, CAN communication module, alarm module, terminal resistance monitoring modular and infrared remote control receiving module, in which:
Controller module is the control centre of entire sensor, for controlling the modules of sensor；
Power module is used to provide electric energy for entire sensor；
On the one hand methane transducer interface module is connect with control module, burning member is on the other hand catalyzed with low-concentration methane
Part is connected with high concentration heat conducting element；
On the one hand CAN communication module is connect with controller module, be on the other hand used as external interface, for connecting acquisition point
It stands, is communicated；
Alarm module is connect with controller module, for realizing warning function；
On the one hand terminal resistance monitoring modular is connect with controller module, on the other hand connect with external terminal resistance, is used
In the conduction of terminal resistance signal；
Infrared remote control receiving module is connect with control module, for receiving infrared signal.
Optionally, controller module include MCU and the supply voltage detection unit being connect with MCU by I/O port respectively,
Starting mode selecting unit, resets key unit, emulation interface unit and serial port unit at factory reset unit.
Optionally, the input stage of power module includes Exia grade input intrinsic safety electric source limit voltage-stabilizing protection module certainly, the mould
Block, which plays that equipment explosive-proof grade is promoted to Exia grade and solves the locally initiating electric current of sensor, causes that intrinsic safety electric source is coupled greatly
Protection problem.
Optionally, the input terminal J3 of Exia grade input intrinsic safety electric source from limit voltage-stabilizing protection module accesses 9-24V voltage, J3
The first pin 1 connect with VIN, and with first diode D1 anode connect, the cathode of first diode D1 and the two or two pole
On the one hand the anode connection of pipe D2, the cathode of the second diode D2 are connect with one end of first resistor R1, first resistor R1's is another
One end is connect with the base stage of the first triode Q1, and the emitter of the first triode Q1 is connect with the cathode of the second diode D2, the
The collector of one triode Q1 is connect with the collector of the base stage of the second triode Q2 and third transistor Q3, first capacitor C1's
One end is connect with the base stage of the second triode Q2, and the other end is connect with the emitter of the second triode Q2, the second triode Q2's
Emitter is connect with the base stage of the first triode, and the collector of the second triode Q2 is connect with one end of the 7th capacitor C7, and with
One end of first inductance RB1 connects, the other end ground connection of the 7th capacitor C7, the other end and the 8th capacitor C8 of the first inductance RB1
One end connection, and connect with the anode of third diode D3, the other end of the 8th capacitor C8 is grounded；The yin of third diode D3
Pole is connect with the anode of the anode of the 13rd capacitor C13, the 18th capacitor C18 respectively, the cathode and the tenth of the 13rd capacitor C13
The cathode of eight capacitor C18 meets GND；The cathode of third diode D3 also with one end of third capacitor C3, the 4th one end capacitor C4
It is connected with the input terminal of U1；The other end of third capacitor C3 and the 4th capacitor C4 meet GND；The external GND of the GND of U1, U1's is defeated
Outlet is connect with one end of the 5th capacitor C5, one end of the 6th capacitor C6 and power supply respectively, the 5th capacitor C5 and the 6th capacitor C6
The other end meet GND；The cathode of third diode D3 also with VIN_after, the 9th capacitor C9, the tenth capacitor C10 and U2
Input terminal Vin connection, output end vo ut and the 11st capacitor C11, the 12nd capacitor C12 and the 3.3v power supply of U2 are connect, and the 9th
Capacitor C9, the tenth capacitor C10, the 11st capacitor C11 and the 12nd capacitor C12 the other end connect together with the end GND of U2
GND；The emitter of third transistor is connect with one end of the 4th resistance R4 and the 5th resistance R5 respectively, the 4th resistance R4 and the 5th
The other end of resistance R5 is grounded, and the base stage of third transistor Q3 is connect with one end of 3rd resistor R3, and 3rd resistor R3's is another
End is connect with one end of the second capacitor C2, and is connect with the cathode of the 4th diode D4, the other end and the 4th of the second capacitor C2
The anode of diode connects, and is grounded；The cathode of 4th diode is also connect with one end of second resistance R2, second resistance R2's
The other end is connect with the cathode of the second diode D2；The second pin 2 of J3 is grounded by the second inductance RB2.
Optionally, methane transducer interface module circuit output end respectively with low-concentration methane catalytic combustion element and highly concentrated
Heat conducting element connection is spent, by controller module by the on-off of the metal-oxide-semiconductor of control methane transducer interface module circuit, and then is controlled
The working condition of methane transducer interface module processed.
Optionally, low-concentration methane catalytic combustion element J5 and high concentration thermal conductivity member in methane transducer interface module circuit
Part J6 is powered by the 3.3V of 4 feet, and 3 feet meet GND, and centre tap is that 2 feet are used to acquire measuring signal；The first pin of J5
1 connect with the drain electrode of the second metal-oxide-semiconductor U2, and connect with the cathode of a diode, and the anode of the diode meets GND；Second metal-oxide-semiconductor
The drain electrode of U2 includes 5 feet, 6 feet, 7 feet and 8 feet, and source electrode includes 1 foot, 2 feet and 3 feet；The source electrode of second metal-oxide-semiconductor U2 connects GND, grid
It is connect respectively with one end of the 24th capacitor C24, the 6th resistance R6 and the 8th resistance R8, the electricity of the 8th resistance R8 and the 24th
The other end for holding C24 meets GND, and the other end of the 6th resistance R6 and the CH_L pin of MCU connect.The first pin 1 of J6 and
The drain electrode of three metal-oxide-semiconductor U3 connects, and connect with the cathode of a diode, and the anode of the diode meets GND；Third metal-oxide-semiconductor U3's
Drain electrode includes 5 feet, 6 feet, 7 feet and 8 feet, and source electrode includes 1 foot, 2 feet and 3 feet；The source electrode of third metal-oxide-semiconductor U3 connects GND, grid difference
It is connect with one end of the 1st capacitor C1, the 7th resistance R7 and the tenth resistance R10, the other end of the tenth resistance R10 and first capacitor C1
GND is met, the other end of the 7th resistance R7 and the CH_H pin of MCU connect.
Optionally, CAN communication module includes CAN transceiver U6, esd discharge device D13, gas-discharge tube D1, the 4th guarantor
Dangerous silk F4, the 5th fuse F5, the 18th resistance C18 and output end J8, wherein the 3 foot TXD and 4 foot RXD of CAN transceiver U6
Be directly connected to respectively with PA11, PA12 pin of MCU, the 1 foot VDD33 of CAN transceiver U6 respectively with 3.3V power supply and the 18th
2 foot GND of capacitor C18 connection, another termination GND of the 18th capacitor C18, CAN transceiver U6 meet GND；7 foot V0 are hanging, 8 feet
CANH1 passes through the 3 foot CANH connections of the 5th fuse F5 and J8, and 9 foot CANL1 pass through the 2 foot CANL of the 4th fuse F4 and J8
Connection, the 1 foot CANG connection of 10 foot CANG and J8；The both ends of gas-discharge tube D1 connect with the 2 foot CANL of J8 and 3 foot CANH respectively
It connects；8 feet of 1 the foot CANH1 and U6 of esd discharge device D13 connect, the 9 feet connection of 2 foot CANL1 and U6,3 foot CANG's and U6
The connection of 10 feet.
The utility model has the advantages that compared with prior art, the utility model has the advantage that
1, remote power-feeding is supported, an intrinsic safety electric source can connect more sensor devices, transmit at a distance anti-interference
And real-time report warning message, transient protection when intrinsic safety electric source being avoided to power on；
2, the intrinsic safety electric source avoided by Exia grade input intrinsic safety electric source from the metering function of limit voltage-stabilizing protection module
Protection restart the malfunction to long-range cutoff instrument；
3, the cold start-up remote power-feeding of catalytic combustion element is realized by the Warming-up control circuit of catalysis burning original part
Reduce the starting current of complete machine；
4, client is facilitated by terminal resistance observation circuit to keep away being apparent from for CAN bus terminal resistance setting situation
Exempt from accidentally plus mistake adds.
Detailed description of the invention
Fig. 1 is the utility model sensor circuit structural schematic diagram；
Fig. 2 is power module circuitry schematic diagram；
Fig. 3 is methane transducer interface module circuit schematic diagram；
Fig. 4 is CAN communication circuit schematic diagram.
Specific embodiment
The technical solution of the utility model is described in detail in the following with reference to the drawings and specific embodiments.
A kind of low-power consumption methane transducer of the remote power-feeding of the utility model, including controller module, power module,
Methane transducer interface module, CAN communication module, alarm module, terminal resistance monitoring modular and infrared remote control receiving module.Its
In, controller module is the control centre of entire sensor, for controlling the modules of sensor；Power module is used to be whole
A sensor provides electric energy；On the one hand methane transducer interface module is connect with control module, another aspect and low-concentration methane
Catalytic combustion element is connected with high concentration heat conducting element；On the one hand CAN communication module is connect with controller module, on the other hand make
It is communicated for external interface for connecting acquisition substation；Alarm module is connect with controller module, for realizing alarm function
Energy；On the one hand terminal resistance monitoring modular is connect with controller module, on the other hand connect with external terminal resistance, is used for terminal
The conduction of resistance signal；Infrared remote control receiving module is connect with control module, for receiving infrared signal.
As shown in Figure 1, the utility model is in order to solve the problems, such as that biosensor power consumption is big, transmission range is close, controller module
It has especially selected low-power consumption, high-performance MCU and has further decreased power consumption by way of lower dominant frequency.Selected MCU is
STM32L103CBT6 and set 12MHZ for dominant frequency, meet in this way sensor real time data processing reduce again it is whole
Machine power consumption.Power module further includes soft starting circuit, and alarm module uses sound light alarming circuit, and infrared remote control receiving module uses
Infrared receiving circuit, CAN communication module use CAN communication circuit, and methane transducer interface module includes catalysis probe soft start
Circuit and thermal conductance probe soft starting circuit, controller module include MCU, supply voltage detection unit, Starting mode selecting unit,
Factory reset unit resets key unit, emulation interface unit and serial port unit, wherein MCU is master controller, with each list
Member is connected by I/O port.
The utility model is especially inputted in power module to solve the problems, such as that new access device causes intrinsic safety electric source to protect
Grade increases Exia grade input intrinsic safety electric source from limit voltage-stabilizing protection module.Module master, which plays, is promoted to equipment explosive-proof grade
Exia grade and the solution locally initiating electric current of sensor cause that intrinsic safety electric source protection problem is coupled greatly, are kept away using the mode of soft start
Exempt from intrinsic safety electric source caused by charging to capacitor, the inductive energy storage element instantaneous large-current in power circuit to protect.Physical circuit figure
As shown in Fig. 2, the input terminal J3 (JACK2-5.00) of Exia grade input intrinsic safety electric source from limit voltage-stabilizing protection module accesses 9-24V
First pin 1 of voltage, J3 is connect with VIN, and is connect with the anode of first diode D1 (B340A), first diode D1's
Cathode is connect with the anode of the second diode D2 (B340A), the cathode one side and the one of first resistor R1 of the second diode D2
End connection, the other end of first resistor R1 are connect with the base stage of the first triode Q1 (S8550), the emitter of the first triode Q1
It is connect with the cathode of the second diode D2, the base stage and third of the collector of the first triode Q1 and the second triode Q2 (B772)
The collector of triode Q3 (9013) connects, and one end of first capacitor C1 is connect with the base stage of the second triode Q2, the other end and
The emitter of second triode Q2 connects, and the emitter of the second triode Q2 is connect with the base stage of the first triode, the two or three pole
The collector of pipe Q2 is connect with one end of the 7th capacitor C7, and is connect with one end of the first inductance RB1, and the 7th capacitor C7's is another
End ground connection, the other end of the first inductance RB1 is connect with one end of the 8th capacitor C8, and the sun with third diode D3 (B340A)
Pole connection, the other end ground connection of the 8th capacitor C8；The cathode of third diode D3 respectively with the anode of the 13rd capacitor C13,
The anode connection of 18 capacitor C18, the cathode of the 13rd capacitor C13 and the cathode of the 18th capacitor C18 meet GND；Three or two
The cathode of pole pipe D3 is also connect with the input terminal of one end of third capacitor C3, the 4th one end capacitor C4 and U1 (78M08)；Third electricity
The other end for holding C3 and the 4th capacitor C4 meets GND；The external GND of the GND of U1, the output end of U1 respectively with the 5th capacitor C5 one
The 3 feet connection at end, one end of the 6th capacitor C6,8V power supply and J2 output terminal, the 5th capacitor C5 and the 6th capacitor C6's is another
One end meets GND；The cathode of third diode D3 also with VIN_after, the 9th capacitor C9, the tenth capacitor C10 and U2 (K7803-
500) input terminal Vin connection, the output end vo ut and the 11st capacitor C11 of U2, the 12nd capacitor C12,3.3v power supply and
1 foot of J2 output terminal connects, the 2 feet ground connection of J2 output terminal；9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11
GND is met together with the end GND of U2 with the other end of the 12nd capacitor C12；The emitter of third transistor is electric with the 4th respectively
The one end for hindering R4 and the 5th resistance R5 connects, the other end ground connection of the 4th resistance R4 and the 5th resistance R5, third transistor Q3's
Base stage is connect with one end of 3rd resistor R3, and the other end of 3rd resistor R3 is connect with one end of the second capacitor C2, and with the 4th
The cathode of diode D4 (LM285Z-1.2) connects, and the other end of the second capacitor C2 is connect with the anode of the 4th diode, and is connect
Ground；The cathode of 4th diode is also connect with one end of second resistance R2, the other end of second resistance R2 and the second diode D2
Cathode connection；The second pin 2 of J3 is grounded by the second inductance RB2.
Powered on moment is approximately short circuit since the second capacitor C2 both end voltage cannot be mutated, so that third transistor Q3 enters
Off state.After third transistor Q3 cut-off due to the collector of third transistor Q3 be high level to the first triode Q1,
Second triode Q2 cut-off.Playing powered on moment cannot be by the purpose of heavy current impact.With the second capacitor of the postponement C2 powered on
Into slow charged state, the base voltage of third transistor Q3 is also gradually increased.When the base voltage of third transistor Q3
Raising just enters magnifying state by off state to a certain extent and finally enters saturation conduction state.When third transistor Q3 enters
The first triode Q1, the second triode Q2 can be caused also to progress into amplification since collector voltage gradually decreases after on state
State, rear class voltage regulator circuit also enter normal operating conditions.
While first resistor R1 both end voltage can be caused first after successive load goes out to load the problems such as increasing or is existing short-circuit
The voltage for rising i.e. first resistor R1 connection the first triode Q1 emitter is constant, first resistor R1 the first triode of connection Q1's
The voltage of base stage declines.The first triode Q1 enters after the emitter and base voltage of the first triode Q1 reach certain threshold value
The base voltage of saturation conduction, the second triode Q2 that collector connects after the first triode Q1 saturation conduction increases.Two or three
Pole pipe Q2 base voltage is transferred to off state and then has cut off rear level power supply after increasing.
Exia grade input intrinsic safety electric source ensure that connection intrinsic safety electric source from limit voltage-stabilizing protection module known to being analyzed above
When do not cause power protection and can determine that several sensors can be coupled in each power supply.It facilitates arrangement and method for construction and avoids new
Protection problem caused by equipment is added.
Further the utility model is specially designed the circuit to catalytic combustion element soft start, while cooperating MCU
The soft starting time for being internally embedded the adjusting catalytic combustion element that formula software can be convenient length.It is further sensor
Just powering on initial stage enables the metal-oxide-semiconductor of the following figure end, and such catalytic combustion element does not just work.Subsequent MCU starts output duty cycle pole
The conducting that small PWM wave keeps metal-oxide-semiconductor faint, the then duty ratio of the increase PWM wave according to preset soft starting time gradually, from
And catalytic combustion element is connected gradually.In this way and meets the operating condition of catalytic combustion element and be also unlikely to moment and quickly open
The problem of remote power-feeding deficiency caused by dynamic.To sum up two kinds of measures have mining methane sensor low in energy consumption and remote
The characteristic of power supply.Physical circuit figure as shown in figure 3, J5, J6 in figure respectively represented low-concentration methane catalytic combustion element and
High concentration heat conducting element, two elements J5, J6 are powered by the 3.3V of 4 feet, and third pin 3 meets GND, and centre tap is 2
Foot is used to collection voltages signal；The voltage signal of acquisition, for expression methane concentration in proportion.The first pin 1 of J5 and
The drain electrode of two metal-oxide-semiconductor U2 connects, and connect with the cathode of a diode, and the anode of the diode meets GND；Second metal-oxide-semiconductor U2's
Drain electrode includes 5 feet, 6 feet, 7 feet and 8 feet, and source electrode includes 1 foot, 2 feet and 3 feet；The source electrode of second metal-oxide-semiconductor U2 connects GND, grid difference
It is connect with one end of the 24th capacitor C24, the 6th resistance R6 and the 8th resistance R8, the 8th resistance R8 and the 24th capacitor
The other end of C24 meets GND, and the other end of the 6th resistance R6 and the CH_L pin of MCU connect.The first pin 1 and third of J6
The drain electrode of metal-oxide-semiconductor U3 connects, and connect with the cathode of a diode, and the anode of the diode meets GND；The leakage of third metal-oxide-semiconductor U3
Pole includes 5 feet, 6 feet, 7 feet and 8 feet, and source electrode includes 1 foot, 2 feet and 3 feet；The source electrode of third metal-oxide-semiconductor U3 meets GND, grid respectively with
The connection of one end of 1st capacitor C1, the 7th resistance R7 and the tenth resistance R10, the other end of the tenth resistance R10 and first capacitor C1 are equal
GND is met, the other end of the 7th resistance R7 and the CH_H pin of MCU connect.
When the 4 foot high level of the second metal-oxide-semiconductor U2 or third metal-oxide-semiconductor U3, catalysis element and heat conducting element pass through the 2nd MOS
5 feet of pipe U2 and third metal-oxide-semiconductor U3 are started to work with being conducting to.
Initial stage is powered on since the both end voltage of the 24th capacitor C24 and first capacitor C1 is unable to catastrophe characteristics, is directly allowed
The gate short of second metal-oxide-semiconductor U2 and third metal-oxide-semiconductor U3 cut off the performance loop of catalysis element and heat conducting element to ground.When
It is 1% that all normal self-test of other modules of sensor, which starts slow output duty cycle by PB0, PB1 pin of rear MCU,
PWM wave, while PWM wave is gradually upgraded to high level output with the duty ratio of increase by 10% per second.This PWM wave duty ratio by
Gradually raised process, the actually charging process to first capacitor C1 and the 24th capacitor C24.Due in PWM wave low
Level is first capacitor C1 and the 24th capacitor C24 is discharge condition so practical during PWM wave duty ratio is increased
On be the second metal-oxide-semiconductor U2 and third metal-oxide-semiconductor U3 the process that gradually rises of grid voltage, second when grid voltage gradually rises
The drain electrode of metal-oxide-semiconductor U2 and third metal-oxide-semiconductor U3 and source electrode gradually are become being connected from disconnection.Simultaneously because circuit is gradually turned on catalysis
Heater strip in combustion elements and heat conducting element is gradually heating, the resistance after heating of catalysis element and heat conducting element itself
It is anti-just to gradually increase.It is all thrown until the second metal-oxide-semiconductor U2 and third metal-oxide-semiconductor U3 all turn on rear catalysis element and heat conducting element
Enter to work normally.It is controlled by being analyzed above seeing as the PWM wave for using controllable duty ratio, when being specifically exactly rigid starting
The duty ratio of PWM wave only has 5%, then successively increases according to the speed of increase by 10% per second.And 5 are stopped at 70% duty ratio
Speed after second according still further to per second 10% increases to 100%；The scheme of turn-on time avoids catalysis element and heat conducting element is prominent
The too big problem of starting current caused by low impedance state when so powering on.
Poor anti jamming capability and polling period are long when the utility model is in order to solve the problems, such as current analog signal transmission, adopt
Solves the problems, such as analog signal transmission poor anti jamming capability with the technology of Field Bus CAN, and since CAN bus is mostly main
The non-demolition formula competition mechanism of formula meets each sub- equipment and the advantage reported immediately when the events such as alarm occurs.Physical circuit is such as
Shown in Fig. 4, including CAN transceiver U6 (TD321DCAN), esd discharge device D13 (PESD24VL2BT), gas-discharge tube D1,
4th fuse F4, the 5th fuse F5, the 18th resistance C18 and output end J8, wherein the 3 foot TXD of CAN transceiver U6 and 4
Foot RXD is directly connected to PA11, PA12 pin of MCU respectively, the 1 foot VDD33 of CAN transceiver U6 respectively with 3.3V power supply and
18 capacitor C18 connections, the 2 foot GND of another termination GND of the 18th capacitor C18, CAN transceiver U6 meet GND；7 foot V0 are outstanding
Sky, 8 foot CANH1 pass through the 3 foot CANH connections of the 5th fuse F5 and J8, and 9 foot CANL1 pass through the 2 of the 4th fuse F4 and J8
Foot CANL connection, the 1 foot CANG connection of 10 foot CANG and J8；The both ends of gas-discharge tube D1 respectively with the 2 foot CANL of J8 and 3 feet
CANH connection；8 feet of 1 the foot CANH1 and U6 of esd discharge device D13 connect, the 9 feet connection of 2 foot CANL1 and U6,3 foot CANG
It is connect with 10 feet of U6.
This sensor uses integrated CAN communication circuit as known from the above, particularly PA11, PA12 pipe of MCU
Foot is directly connected to the 3 foot TXD and 4 foot RXD of CAN transceiver U6, the module output by CAN transceiver U6 transceiver insulation one
To J8, wherein F4, F5, D1, D13 are the anti-interference abilities for communication bus and the fuse, gas-discharge tube, the ESD that are arranged
Discharge device.
Claims (7)
1. a kind of low-power consumption methane transducer of remote power-feeding, which is characterized in that including controller module, power module, first
Alkane sensor interface module, CAN communication module, alarm module, terminal resistance monitoring modular and infrared remote control receiving module,
In:
Controller module is the control centre of entire sensor, for controlling the modules of sensor；
Power module is used to provide electric energy for entire sensor；
On the one hand methane transducer interface module is connect with control module, on the other hand with low-concentration methane catalytic combustion element and
The connection of high concentration heat conducting element；
On the one hand CAN communication module is connect with controller module, be on the other hand used as external interface, for connecting acquisition substation,
It is communicated；
Alarm module is connect with controller module, for realizing warning function；
On the one hand terminal resistance monitoring modular is connect with controller module, on the other hand connect with external terminal resistance, for eventually
Hold the conduction of resistance signal；
Infrared remote control receiving module is connect with control module, for receiving infrared signal.
2. a kind of low-power consumption methane transducer of remote power-feeding according to claim 1, which is characterized in that controller mould
Block includes MCU and the supply voltage detection unit being connect respectively by I/O port with MCU, Starting mode selecting unit, recovers
Factory's setting unit resets key unit, emulation interface unit and serial port unit.
3. a kind of low-power consumption methane transducer of remote power-feeding according to claim 1, it is characterised in that: power module
Input stage include Exia grade input intrinsic safety electric source from limit voltage-stabilizing protection module, which, which plays, promotes equipment explosive-proof grade
To Exia grade and the solution locally initiating electric current of sensor cause that intrinsic safety electric source protection problem is coupled greatly.
4. a kind of low-power consumption methane transducer of remote power-feeding according to claim 3, it is characterised in that: Exia grade
The input terminal J3 for inputting intrinsic safety electric source from limit voltage-stabilizing protection module accesses 9-24V voltage, and the first pin 1 of J3 is connect with VIN, and
It is connect with the anode of first diode D1, the cathode of first diode D1 is connect with the anode of the second diode D2, the two or two pole
On the one hand the cathode of pipe D2 is connect with one end of first resistor R1, the base stage of the other end of first resistor R1 and the first triode Q1
Connection, the emitter of the first triode Q1 are connect with the cathode of the second diode D2, the collector and second of the first triode Q1
The base stage of triode Q2 is connected with the collector of third transistor Q3, the base stage of one end of first capacitor C1 and the second triode Q2
Connection, the other end are connect with the emitter of the second triode Q2, the emitter of the second triode Q2 and the base stage of the first triode
Connection, the collector of the second triode Q2 is connect with one end of the 7th capacitor C7, and is connect with one end of the first inductance RB1, the
The other end of seven capacitor C7 is grounded, and the other end of the first inductance RB1 is connect with one end of the 8th capacitor C8, and with third diode
The anode of D3 connects, the other end ground connection of the 8th capacitor C8；The cathode of third diode D3 respectively with the 13rd capacitor C13 just
The anode connection of pole, the 18th capacitor C18, the cathode of the 13rd capacitor C13 and the cathode of the 18th capacitor C18 meet GND；The
The cathode of three diode D3 is also connect with the input terminal of one end of third capacitor C3, the 4th one end capacitor C4 and U1；Third capacitor
The other end of C3 and the 4th capacitor C4 meet GND；The external GND of the GND of U1, the output end of U1 respectively with the 5th capacitor C5 one
End, the 6th capacitor C6 one end connected with power supply, the other end of the 5th capacitor C5 and the 6th capacitor C6 meet GND；Three or two pole
The cathode of pipe D3 is also connect with the input terminal Vin of VIN_after, the 9th capacitor C9, the tenth capacitor C10 and U2, the output end of U2
Vout is connect with the 11st capacitor C11, the 12nd capacitor C12 and 3.3v power supply, the 9th capacitor C9, the tenth capacitor C10, the 11st
The other end of capacitor C11 and the 12nd capacitor C12 meet GND together with the end GND of U2；The emitter of third transistor respectively with
One end of 4th resistance R4 and the 5th resistance R5 connects, the other end ground connection of the 4th resistance R4 and the 5th resistance R5, the three or three pole
The base stage of pipe Q3 is connect with one end of 3rd resistor R3, and the other end of 3rd resistor R3 is connect with one end of the second capacitor C2, and
It is connect with the cathode of the 4th diode D4, the other end of the second capacitor C2 is connect with the anode of the 4th diode, and is grounded；4th
The cathode of diode is also connect with one end of second resistance R2, and the cathode of the other end of second resistance R2 and the second diode D2 connect
It connects；The second pin 2 of J3 is grounded by the second inductance RB2.
5. a kind of low-power consumption methane transducer of remote power-feeding according to claim 1, it is characterised in that: methane sensing
Device interface module circuit output end is connect with low-concentration methane catalytic combustion element and high concentration heat conducting element respectively, by controller
Module controls methane transducer interface module by controlling the on-off of the metal-oxide-semiconductor of methane transducer interface module circuit
Working condition.
6. a kind of low-power consumption methane transducer of remote power-feeding according to claim 5, it is characterised in that: methane sensing
Low-concentration methane catalytic combustion element J5 and high concentration heat conducting element J6 is supplied by the 3.3V of 4 feet in device interface module circuit
Electricity, 3 feet meet GND, and centre tap is that 2 feet are used to acquire measuring signal；The drain electrode of the first pin 1 and the second metal-oxide-semiconductor U2 of J5 connects
It connects, and is connect with the cathode of a diode, the anode of the diode meets GND；The drain electrode of second metal-oxide-semiconductor U2 includes 5 feet, 6 feet, 7
Foot and 8 feet, source electrode include 1 foot, 2 feet and 3 feet；The source electrode of second metal-oxide-semiconductor U2 meets GND, grid respectively with the 24th capacitor
One end of C24, the 6th resistance R6 and the 8th resistance R8 connect, and the other end of the 8th resistance R8 and the 24th capacitor C24 connect
The other end of GND, the 6th resistance R6 and the CH_L pin of MCU connect；The drain electrode of the first pin 1 and third metal-oxide-semiconductor U3 of J6 connects
It connects, and is connect with the cathode of a diode, the anode of the diode meets GND；The drain electrode of third metal-oxide-semiconductor U3 includes 5 feet, 6 feet, 7
Foot and 8 feet, source electrode include 1 foot, 2 feet and 3 feet；The source electrode of third metal-oxide-semiconductor U3 meets GND, grid respectively with the 1st capacitor C1, the 7th
The connection of one end of resistance R7 and the tenth resistance R10, the other end of the tenth resistance R10 and first capacitor C1 connect GND, the 7th resistance
The other end of R7 and the CH_H pin of MCU connect.
7. a kind of low-power consumption methane transducer of remote power-feeding according to claim 1, it is characterised in that: CAN communication
Module includes CAN transceiver U6, esd discharge device D13, gas-discharge tube D1, the 4th fuse F4, the 5th fuse F5,
18 resistance C18 and output end J8, wherein the 3 foot TXD and 4 foot RXD of CAN transceiver U6 are managed with PA11, PA12 of MCU respectively
Foot is directly connected to, and the 1 foot VDD33 of CAN transceiver U6 is connect with 3.3V power supply and the 18th capacitor C18 respectively, the 18th capacitor
The 2 foot GND of another termination GND of C18, CAN transceiver U6 meet GND；7 foot V0 are hanging, and 8 foot CANH1 pass through the 5th fuse F5
It is connect with the 3 foot CANH of J8,9 foot CANL1 pass through the 2 foot CANL connections of the 4th fuse F4 and J8,1 foot of 10 foot CANG and J8
CANG connection；The both ends of gas-discharge tube D1 are connect with the 2 foot CANL of J8 and 3 foot CANH respectively；1 foot of esd discharge device D13
8 feet of CANH1 and U6 connect, the 9 feet connection of 2 foot CANL1 and U6, the 10 feet connection of 3 foot CANG and U6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822207247.7U CN209327317U (en) | 2018-12-26 | 2018-12-26 | A kind of low-power consumption methane transducer of remote power-feeding |
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| CN201822207247.7U CN209327317U (en) | 2018-12-26 | 2018-12-26 | A kind of low-power consumption methane transducer of remote power-feeding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
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2018
- 2018-12-26 CN CN201822207247.7U patent/CN209327317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
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Address after: 211161 No. 50 Baoxiang Road, Jiangning Binjiang Economic Development Zone, Nanjing City, Jiangsu Province Patentee after: Nanjing North Road Intelligent Control Technology Co., Ltd Address before: 211161 No. 50 Baoxiang Road, Jiangning Binjiang Economic Development Zone, Nanjing City, Jiangsu Province Patentee before: NANJING BESTWAY AUTOMATION SYSTEM Co.,Ltd. |
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