CN107314248A - Natural gas point is for adding smelly compensation supervising device - Google Patents
Natural gas point is for adding smelly compensation supervising device Download PDFInfo
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- CN107314248A CN107314248A CN201710630703.6A CN201710630703A CN107314248A CN 107314248 A CN107314248 A CN 107314248A CN 201710630703 A CN201710630703 A CN 201710630703A CN 107314248 A CN107314248 A CN 107314248A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
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Abstract
Natural gas point is supplied plus smelly compensation supervising device belongs to coal and changes gas engineering LNG points for small gas flow device for adding odor technical field, more particularly to a kind of natural gas point is for adding smelly compensation supervising device.The present invention adds smelly continuous, accurate, safety natural gas point for adding smelly compensation supervising device aiming above mentioned problem there is provided a kind of.The present invention includes CPU, EEPROM, RS485 part, Power convert part, usb segment, clock circuit, detection signal pulse importation, check valve drive control part plus smelly pump drive control part, key part and LCDs, signal transmission port, the signal transmission port of RS485 parts, the signal transmission port of usb segment, the signal transmission port of clock circuit of CPU signal transmission port respectively with EEPROM are connected, and CPU detection signal input port is connected with the detection signal output port of detection signal pulse importation.
Description
Technical field
Change gas engineering LNG points for small gas flow device for adding odor technical field, more particularly to one kind the invention belongs to coal
Natural gas point is for adding smelly compensation supervising device.
Background technology
Replace coal-fired engineering project using natural gas clean energy resource, be that the Chinese government is reduction CO2 emission, improvement
One fundamental state policy of air quality, people's living standard of preserving the ecological environment, improve, by the coal-fired life style in vast rural area
It is promoted to combustion gas life style.As the civilian-oriented project and blue sky environment-friendly engineering of government, LNG points for equipment it is all it is low into
The safe and reliable outfit requirement of this high-performance.
Natural gas is very environmentally friendly after being used as clean energy resource, conveniently, but natural gas is flammable explosive gas, once occur
Leakage, it is likely that fire or explosion accident can be triggered, must there is enough safety precautions using natural gas.To colorless and odorless
Natural gas in add odorant of fuel gases, make combustion gas that there is enough special odors very easily recognized, be that the current world is general
One of safe way measure all over application.
Odorant of fuel gases smell is very special, just has very strong penetrating odor in the concentration of very little, and should not disappear,
It is a kind of good combustion gas smell warning agent.
Odorant of fuel gases is chemicals in itself, and majority is toxic liquid, and its gas has inflammable and explosive property, the same with combustion gas
There are certain danger and harmfulness.Most odorant of fuel gases chemical property are sufficiently stable, are difficult natural decomposition, are not easy to and other
Material chemical combination, is the material with very big harmfulness and potential safety hazard.In addition odorant is also with very strong adsorptivity and desorption
Attached property, adsorption and desorption speed is widely different because of material difference, very long on other objects once being easily absorbing after leakage
Time can all distribute the smell of odorant.
The addition deficiency of odorant can not play safe warning function in combustion gas, the addition of odorant in combustion gas
Excessively, then imperfect combustion can be caused, triggers other unnecessary supply accidents.GB50028《Code for design of city gas engineering》The
3.2.3 bar clear stipulaties, nontoxic gas leakage reaches into air should be able to smell odorant during 20% concentration of LEL
Smell, the odour intensity of odorant is 2 grades of warning intensity, and by taking thiophane odorant as an example, the odorizing amount of unit combustion gas should add
Plus 20mg.
The effect of apparatus for making gas ordorous is exactly that odorant is added into combustion gas, makes the combustion gas of gas pipeline and has unique mark
Will smell, has just leaked in generation combustion gas and has not also produced the when marquis that injury is also impossible to explode to people, be just easy to
It is therefore easily perceived by humans, processing leakage alarm or escape, are prevented effectively from the poisoning and explosion accident triggered by gas leakage in time, ensures
Safe way.
Because the odorant content needed in combustion gas is very small, in milligram level, for existing apparatus for making gas ordorous
For, in the sufficiently large (500m of gas flow3/ more than h) when, odorant amount needed for accumulation all 500 × 20=10000mg with
On, required more than the ÷ 60=166.67mg of odorant amount 10000 per minute are calculated by single output quantity 150mg-50mg, plus smelly
Pump basic guarantee is per minute can the output frequency of 1-3 times, and basic guarantee returns leakage phenomenon without odorant, and is easier to realize
Odorizing agent concentration is uniform, and addition is substantially accurate.
In gas flow very little, less than 500m3During/h, existing apparatus for making gas ordorous, which can not be met, accurately adds smelly demand,
Generally using excessive plus smelly method processing, also there are individual cases to occur when odorizing amount is not enough, gas flow is very low plus smelly do not connect
It is continuous, produce supply potential safety hazard.
The operation principle of existing apparatus for making gas ordorous is so：Plus smelly controller receives the analog current of gas meter
Flow signal, control plus smelly pump count odorant by the odorizing amount of setting.Plus continuous gas flow signal is converted into by smelly pump
The reciprocating motion number of times of plunger, is a discrete output procedure, is injected by adding the transmission of smelly pipeline to tend to continuous flowing
In gas pipeline.Plus the output end of smelly pump sets check valve, odorant liquid one-way flowing is controlled, check valve should not have in theory
Any time leakage quantity, is actually influenceed, check valve is that have by dust in machining accuracy, pipeline and odorant endoparticle impurity
Leakage quantity is returned, check valve returns leakage quantity very little in high frequency motion, almost do not shown not come out, when check valve low frequency movement, returned
Time leakage quantity that leakage quantity can be accumulated with time span, which can become increasing, too low motion frequency, necessarily causes check valve to stop fortune
The dynamic time is very long, and output quantity can be can exceed that by returning leakage quantity.At present plus smelly pump check valve dwell time scope was at 30 minutes to 90 minutes
Stable minimum single output quantity 50mg when left and right, 50 beats/min of working frequency, by national regulations 20mg/m3Standard of odorizing can
For 2.5m3Natural gas odorization.As gas flow 500m3During/h, working frequency is 3.33 times, if gas flow as little as 50m3/h
When, working frequency only 0.333 time, i.e., 3 minute action per minute is once.If gas flow as little as 5m3During/h, working frequency
Once, combustion gas recharge phenomenon is possible to occur, that is to say, that this is for only 0.0333 beat/min, i.e., 30 minute action per minute
If a critical point gas flow is less than 5m for a long time3/ h, will occur combustion gas recharge.
When adding smelly equipment actual motion, gas flow can be continually changing, LNG points for station in some cases 1 day also only
With tens side's combustion gas, many situations are used when three meals of Morning Afternoon Evening are concentrated on gas, other times gas flow very little, or even several
Just there is 1m hour3Gas flow passes through, and gas flowmeter in this case, is merely capable of output 3.96mA~4.04mA or so
Analog current signal, substantially belong to null offset phenomenon, conventional controller, which receives such signal value and will not exported, accurately to be had
Imitate plus smelly pump actuating signal, plus the smelly pump time out of service can be very long, for up to by 10 to 12 hours, under this operating condition
The combustion gas flowed through just does not add odorant.
On the other hand add smelly device interior plus smelly pump do not move for a long time check valve return leakage quantity can obvious, stay in add
Odorant in smelly equipment installation can return a part by combustion gas top, it is also possible to be pushed to return to and add at smelly pump, and most serious, which is pushed to return to, to be added
In smelly dose of storage tank, the mixed gas of combustion gas and odorant is arranged from storage tank pressure relief opening.This thing happens pollutes surrounding enviroment,
There is potential safety hazard, when adding smelly equipment movement output again, combustion gas has been completely filled with inside smelly pump due to adding, without liquid
Body odorant, plus smelly pump operation frequency is high again can not export odorant.
The content of the invention
The present invention adds smelly continuous, accurate, safety natural gas point for adding smelly compensation aiming above mentioned problem there is provided a kind of
Supervising device.
To achieve the above object, the present invention is adopted the following technical scheme that, the present invention include CPU, EEPROM, RS485 part,
Power convert part, usb segment, clock circuit, detection signal pulse importation, check valve drive control part plus
Smelly pump drive control part, key part and LCDs, CPU signal transmission port are transmitted with EEPROM signal respectively
Port, the signal transmission port of RS485 parts, the signal transmission port of usb segment, the signal transmission port of clock circuit
It is connected, CPU detection signal input port is connected with the detection signal output port of detection signal pulse importation, detection letter
Feel the pulse and rush the detection signal input port of importation and be connected with the detection signal pulse output port of gas meter；
CPU operational factor sets input port to be connected with key part；
CPU control signal output mouth control signal input mouthful respectively with check valve drive control part plus smelly
The control signal input mouthful of pump drive control part is connected, and the control signal output mouthful of check valve drive control part is respectively
Control signal input mouthful, the control signal input of upper check valve mouthful with lower check valve are connected, plus smelly pump drive control part
The control signal output mouthful divided is with adding the control signal input mouthful of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part.
As a kind of preferred scheme, CPU of the present invention uses STC12C5A60S2 chips U1.
As another preferred scheme, detection signal pulse importation of the present invention uses TPL521 optocouplers U2, U2
1 pin connect 24V power supplys, U2 2 pin connect the detection signal pulse output port of gas meter by resistance R6, and U2 3 pin connect
Ground, U2 4 pin connect U1 12 pin.
As another preferred scheme, of the present invention plus smelly pump drive control part uses the 1 of TPL521 optocouplers U3, U3
Pin connects 5V power supplys, and U3 2 pin connected 34 pin that resistance R7 meets U1, and U3 4 pin, 3 pin connect the control signal input for adding smelly pump
Mouthful.
As another preferred scheme, check valve drive control part of the present invention include TPL521 optocouplers U7 and
TPL521 optocouplers U13, U7 1 pin connect 3.3V power supplys by resistance R40, U7 2 pin respectively with resistance R41 one end, electric capacity C35 mono-
End, U1 21 pin are connected, electric capacity C35 other ends ground connection, 3 pin, resistance R43 one end, the resistance of the resistance R41 other ends respectively with U7
R42 one end be connected, U7 4 pin are connected with P-12V ends, the resistance R43 other ends respectively with electric capacity C39 one end, NPN triode Q2 bases
Extremely it is connected, the electric capacity C39 other ends are connected with the resistance R42 other ends, NPN triode Q2 emitter stages, ground wire respectively, NPN triode
Control signal input mouthful of the Q2 colelctor electrodes respectively with resistance R44 one end, lower check valve is connected, and the resistance R44 other ends pass through LED
Lamp D9 connects P-12V ends；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end,
U1 22 pin are connected, electric capacity C79 other ends ground connection, 3 pin, resistance R83 one end, the resistance of the resistance R77 other ends respectively with U13
R80 one end be connected, U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3
Base stage is connected, and the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, the poles of NPN tri-
Control signal input mouthful of the pipe Q3 colelctor electrodes respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through
LED 15 connects P-12V ends.
As another preferred scheme, EEPROM of the present invention includes 24C02 chips, 1,2,3,4 pin of 24C02 chips
Ground connection, 5 pin of 24C02 chips are connected with resistance R2 one end, cpu signal transmission port respectively, and 6 pin of 24C02 chips pass through electricity
Resistance R1 connects 3.3V power supplys, and the resistance R2 other ends are connected with 3.3V power supplys, 8 pin of 24C02 chips, electric capacity C1 one end respectively, electric capacity
The C1 other ends are grounded.
As another preferred scheme, 1 pin and U1 of the RS485 parts of the present invention including MAX485E chips U5, U5
10 pin are connected, and 3 pin, U1 14 pin of U5 2 pin respectively with U5 are connected, and U5 4 pin are connected with U1 11 pin, and U5 5 pin are grounded,
A mouth of U5 6 pin respectively with resistance R14 one end, coffret J7 is connected, the B of the resistance R14 other ends respectively with coffret J7
Mouth, U5 7 pin are connected, and U5 8 pin connect 5V power supplys.
As another preferred scheme, Power convert part of the present invention includes LM2596 chip U9 and LM1117 chips
U10, U9 1 pin are connected with diode D12 negative electrodes, 12V power ends, electric capacity C44 positive poles, electric capacity C46 one end respectively, diode
D12 anodes connect switched power output, Switching Power Supply input termination civil power；Electric capacity C44 negative poles, the electric capacity C46 other ends, the 5 of U9
The 3 pin ground connection of pin, U9, U9 2 pin are connected with Schottky diode D13 negative electrodes, inductance L5 one end respectively, Schottky diode
D13 plus earths, the inductance L5 other ends respectively with electric capacity C50 positive poles, U9 4 pin, 5V power ends, electric capacity C52 one end, U10 3
Pin is connected, electric capacity C50 negative poles, the electric capacity C52 other ends, U10 1 pin ground connection；U10 2 pin respectively with electric capacity C53 one end, inductance
L6 one end be connected, the electric capacity C53 other ends ground connection, the inductance L6 other ends respectively with 3.3V power ends, electric capacity C55 one end, resistance R46
One end is connected, and electric capacity C55 other ends ground connection, the resistance R46 other ends are grounded by LED D14.
As another preferred scheme, usb segment of the present invention includes HEADER 14X2USB chips, USB cores
2 pin of piece connect 3V3 power supplys by 0.47 μ F electric capacity, and 5 pin of USB chips connect U1 3 pin, 6 pin of USB chips respectively with U1 4
Pin, 3V3 power supplys are connected, and 11 pin of 9 pin of USB chips respectively with 10nF electric capacity one end, USB chips are connected, and 10nF electric capacity is another
End ground connection；13 pin of USB chips are connected with 12M crystal oscillators one end, the first 22pF electric capacity one end respectively, the first 22pF electric capacity other ends
Ground connection, 14 pin of the 12M crystal oscillators other end respectively with the 2nd 22pF electric capacity one end, USB chips are connected, the 2nd 22pF electric capacity other ends
Ground connection, 24 pin of USB chips pass sequentially through reverse light emitting diode, 1K resistance and connect 3V3 power supplys.
As another preferred scheme, 2,3 pin that clock circuit of the present invention includes 1302 chip U4, U4 meet 32K768
Crystal oscillator two ends, 38 pin of U4 5 pin respectively with resistance R12 one end, U1 are connected, another termination 5V power supplys of resistance R12, U4 6 pin
37 pin with resistance R11 one end, U1 are connected respectively, another termination 5V power supplys of resistance R11, U4 7 pin respectively with resistance R10 mono-
End, U1 36 pin are connected, another termination 5V power supplys of resistance R10；U4 8 pin connect battery.
As another preferred scheme, key part of the present invention include KEYLEFT buttons, KEYUP buttons,
KEYDOWN buttons, KEYSET buttons, KEYRIGHT buttons and KEYCHANGE buttons, the tie point of KEYLEFT buttons one respectively with
Resistance R2 one end, U1 2 pin are connected, another tie point ground connection of KEYLEFT buttons；
5 pin of the tie point of KEYUP buttons one respectively with resistance R3 one end, U1 are connected, and another tie point of KEYUP buttons connects
Ground；
7 pin of the tie point of KEYDOWN buttons one respectively with resistance R4 one end, U1 are connected, another tie point of KEYDOWN buttons
Ground connection；
6 pin of the tie point of KEYSET buttons one respectively with resistance R5 one end, U1 are connected, and another tie point of KEYSET buttons connects
Ground；
8 pin of the tie point of KEYRIGHT buttons one respectively with resistance R1 one end, U1 are connected, another connection of KEYRIGHT buttons
Point ground connection；
1 pin of the tie point of KEYCHANGE buttons one respectively with resistance R2 one end, U1 is connected, another company of KEYCHANGE buttons
Contact is grounded；
The resistance R2 other ends, the resistance R3 other ends, the resistance R4 other ends, the resistance R5 other ends, the other end of resistance 1, resistance
The R2 other ends are connected.
As another preferred scheme, the control signal input mouthful of lower check valve of the present invention and the control of upper check valve
Signal input port processed uses solid-state relay.
As another preferred scheme, 2 pin, the electric capacity C102 mono- of U1 of the present invention 23 pin respectively with 521 optocoupler U19
End is connected, and 3 pin of the electric capacity C102 other ends respectively with ground wire, U19 are connected, and U19 1 pin connects 3.3V power supplys by resistance R121,
U19 4 pin are connected with electric capacity C104 one end, PNP triode Q6 base stages respectively by resistance R125, electric capacity C104 other ends difference
It is connected with ground wire, PNP triode Q6 colelctor electrodes, PNP triode Q6 emitter stages are controlled with diode D18 anodes, relay K5 respectively
End one end processed is connected, and diode D18 negative electrodes are controlled with the relay K5 control ends other end, POWER power ends, relay K5 respectively
Switch fixing end to be connected, relay K5 controlled switch first stirs termination P-12V ends, the second struck side of relay K5 controlled switch
Take over control non-return filling magnetic valve control end, prevent recharge magnetic valve be arranged on check valve and add smelly pipeline between.
Can be equipped with prevents the magnetic valve of recharge, CPU monitorings plus smelly pump action feedback loop output signal break time, in setting
Interior without output signal, relay K5 can control closed electromagnetic valve, prevent combustion gas recharge from occurring.When output signal is transmitted again
When magnetic valve open immediately, continue to output odorant.
As another preferred scheme, the base stage phase that U1 of the present invention 39 pin pass through resistance R9 and PNP triode Q2
Even, PNP triode Q2 emitter stage connects 5V power supplys, and PNP triode Q2 colelctor electrode connects buzzer positive pole, and buzzer negative pole connects
Ground.
Secondly, LCDs of the present invention uses OCMJ4X8C LCD MODULEs.
In addition, present invention additionally comprises RS232 parts, RS232 parts include MAX3232C chips, MAX3232C chips
12nd, 10,11 pin of 11 pin respectively with U1 are connected, 16 pin of MAX3232C chips respectively with 3.3V power supplys, electric capacity C3 one end, electric capacity
C2 one end be connected, 2 pin of another termination MAX3232C chips of electric capacity C3, the electric capacity C2 other ends respectively with electric capacity C4 one end, ground wire,
15 pin of MAX3232C chips are connected, 6 pin of another termination MAX3232C chips of electric capacity C4；8 pin of MAX3232C chips pass through
Reverse TVS diode D2 ground connection, 7 pin of MAX3232C chips are grounded by reverse TVS diode D4, and the 13 of MAX3232C chips
Pin is grounded by reverse TVS diode D1, and 14 pin of MAX3232C chips are grounded by reverse TVS diode D3；MAX3232C
5 pin of chip are connected by electric capacity C6 with 4 pin of MAX3232C chips, 3 pin of MAX3232C chips by electric capacity C5 with
1 pin of MAX3232C chips is connected.
Beneficial effect of the present invention.
The present invention analyzes existing equipment operation principle and actual operating mode and the operation troubles that may occur, in line with by
According to LNG points for it is required continuous plus smelly, uniform plus smelly, avoid operation troubles, it is unattended, with low cost, reliable and stable
Several basic principles, on the basis of the present invention is based on existing plus smelly equipment and technology, in control system and gas meter signal pair
Connect, several aspects such as control system operating condition, equipment precision reasonable disposition have carried out conscientiously studying well technical research and improvement,
And carried out long-term factory's internal model and fit actual motion test, operating condition overall process is recorded, monitoring pipe network end adds smelly dense
Degree, repeatedly modification control system control model and device configuration, have reached the requirement that LNG points are supplied.
It is reliable and stable continuously plus smelly that the present invention uses pulse signal to access, and odorant recharge function, nothing are avoided with compensation
People is on duty, without using magnetic valve, with low cost.
Directly commanded present invention employs pulse signal plus the output of smelly pump, reduce signal conversion process, no matter gas flow
It is more small or how long, can reliably plus smelly, plus smelly continuous-stable；Realize and be servo-actuated plus smelly, gas flow is continually changing odorant output
Amount also changes therewith, it is ensured that the odorizing agent concentration in unit combustion gas is substantially uniform.
The present invention need not change existing equipment part-structure and configuration, and cost of goods manufactured is cheap.
The present invention plus smelly pipeline rear portion are provided with check (non-return) valve.Plus non-return valve is equipped with smelly pipeline, high pressure resistant, pressurize are held
Long, corrosion-resistant No leakage.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description.The scope of the present invention not only limits to
In the statement of herein below.
Fig. 1 is device for adding odor normal operation mode schematic diagram.
Fig. 2 is device for adding odor recharge route schematic diagram.
Fig. 3, Fig. 4 are gas flow signals with adding smelly pump work frequency curve figure.
Fig. 5 is Power convert partial circuit schematic diagram of the present invention.
Fig. 6 is eeprom circuit schematic diagram of the present invention.
Fig. 7 is RS232 partial circuits schematic diagram of the present invention.
Fig. 8 is check valve drive control part circuit theory diagrams of the present invention.
Fig. 9 is the electric operation control circuit figure that the present invention sets the magnetic valve for preventing recharge.
Figure 10 is CPU detections control relevant portion circuit theory diagrams of the present invention.
Figure 11 is usb segment circuit theory diagrams in Figure 10.
Figure 12 is key part circuit theory diagrams in Figure 10.
Figure 13 is cpu circuit schematic diagram in Figure 10.
Figure 14 is clock circuit circuit theory diagrams in Figure 10.
Figure 15 is detection signal pulse importation and plus smelly pump drive control part circuit theory diagrams in Figure 10.
Figure 16 is LCDs partial circuit schematic diagram in Figure 10.
Figure 17 is automatic and manual control conversion control circuit.
Figure 18 is Pulse Width Control power unit (U3 in Figure 18 is LM2575 chips).Also may be used Power convert part of the present invention
Using Figure 18 circuit.
Figure 19 is another embodiment of check valve drive control part of the present invention.
Embodiment
As illustrated, supplying device for adding odor present invention can apply to LNG points, LNG points are mended for device for adding odor including pulse period
Repay controller (i.e. natural gas point of the present invention for plus smelly compensation supervising device), gas meter, odorizing agent storage tank plus smelly pump, under
Check valve, upper check valve plus smelly pipeline and check (non-return) valve, detection signal pulse input port and the combustion of pulse period compensating controller
The detection signal pulse output port of air-flow gauge is connected, and the control signal output mouthful of pulse period compensating controller is smelly with adding
The control signal input mouthful of pump is connected；
Plus the import of smelly pump is connected by lower check valve with the outlet of odorizing agent storage tank, plus smelly pump outlet pass through it is upper unidirectional
Valve with plus smelly line inlet be connected, plus smelly pipeline outlet is connected by check (non-return) valve with gas pipeline.
Plus smelly pump extracts odorant out out of odorizing agent storage tank and is output to upper check valve, odorant is flowed through plus smelly pipeline is to non-return
Enter gas pipeline after valve, odorant vaporization makes combustion gas have recognizable special odor with combustion gas mixing, it is ensured that supply safety.
Described plus smelly pump uses oil-filled type electromagnetic diaphragm plunger metering pump.
The liquid level gauge uses glass tube scale liquid position meter.
The detection signal pulse output port of the gas meter is with 0.1m3Or 1.0m3Or 2m3Or 5m3Or 10m3Flow
A pulse signal is exported, pulse period compensating controller receives a pulse signal control plus the progress of smelly pump is one or many dynamic
Make.Each pulse follow-up signal can ensure plus smelly pump once or is repeatedly acted, and effectively export a certain amount of odorant, subtract
Few signal conversion process, it is ensured that odorant is continuously exported, it is ensured that often flow through a certain amount of combustion gas, can all there is a certain proportion of plus smelly
Agent output and combustion gas mixing.
Described plus smelly pump single output quantity is 50mg, and a pulse signal represents 5m3Gas quantity, pulse period compensation control
Device receives a pulse signal control plus smelly pump is exported 2 times.
The pulse period compensating controller receives a pulse signal control plus smelly pump is exported 0.4 time, 0.8 time, 2 times.
During less than 1 time, pulse period compensating controller exports 1 50mg odorant when gathering enough integer according to umber of pulse is cumulative；At the scene
Single output quantity is adjusted under operating mode, when a pulse signal represents 2m3 gas flows, single output quantity is adjusted to 80mg, four
Smelly pump is added to act during individual pulse 1 time；
The making gas ordorous standard of unit is adjusted under operating mode at the scene, when a pulse signal represents 2m3 gas flows, will be added
Smelly standard is adjusted to 25mg/m3, and single output quantity can remain as 50mg, adds smelly pump to act during 2 pulses 1 time.
Described plus smelly pump is not when (more than 30 minutes) are moved for a long time, and the control of pulse period compensating controller plus smelly pump increase
Plus several times plus the motion of smelly pump, export some odorants, the odorant that combustion gas top is returned be supplemented, make the combustion gas amount of returning back to top with
Compensate output quantity and keep equal；Compensation rate and compensation number of times according to gas pipe pressure and lower check valve, upper check valve it is tight
Degree field measurement determine, and do tracking and monitoring adjust out compensation rate and compensation number of times (using average quality check valve, with
The measured data of DN8 calibers, 0.1MPa pressure, was compensated 40 times or so in 24 hours planted agents.50 grams of left sides of every meter of volume of DN8 calibers
The right side, single output quantity 50mg, 40 40 × 50=2000mg=2 grams of output, about 4 centimetre lengths.The routinely reality of device for adding odor
Border installation method, plus smelly length of pipeline is all more than 3 meters, apart from more than 3.5 meters of check valve, combustion gas is not had and enters unidirectional substantially
The possibility of valve.Accordingly data combustion gas enter check valve shortest time should be in 3.5 × 50 ÷ 2=87.5 days).By it is above-mentioned can
Know, pulse period compensating controller of the present invention has long-term without preventing gas recharge compensation plus smelly function under gas flow operating mode.Make
With magnetic valve automatically close plus smelly pipeline on valve can play cut-out combustion gas recharge phenomenon, but need to increase magnetic valve, threeway,
There is cutting-off valve during for maintenance before and after the parts such as bypass pipe, by-passing valve and cable, magnetic valve.It is costly, it is uncomfortable
With inexpensive LNG points for adding smelly equipment.
Segment unit control model and automatic servo antrol pattern when the pulse period compensating controller includes manual, if
When automatic servo antrol pattern goes wrong, segment unit control model when starting manual is shown in circuit theory Figure 17, in circuit design
Upper plus 1K monitoring resistor R14, when pulse input signal end goes wrong, the DC 24V load meetings of this controller output
Change, monitoring resistor R14 can send variable signal and be transmitted to software program, software can be redirected automatically switches to manual period control
Molding formula.After pulse input signal end, which goes wrong, to be released from, the DC 24V loads of this controller output are automatic to recover normal,
Software can be redirected automatically switches to automatic servo antrol pattern.
Segment unit control model, by segment unit when (24 hours) were divided into 48 in one day, every 30 minutes is one when described manual
Unit, when each in segment unit setting 0~255 time output times, output times are evenly distributed to per minute；It is per minute not
During foot 1 time, two minutes (or three minutes or more minute) output once, by that analogy；When being provided only with 1 output, at this
Segment unit is exported for first minute, without output in remaining minute.
The automatic servo antrol pattern produced problem includes gas meter failure, gas meter maintenance, combustion gas
Flowmeter communicating interrupt.
The pulse period compensating controller is arranged in tight anti-explosion casing；Suitable for outside explosion-proof area interior room it is long-term nobody
Continuous operation on duty.
Piece electrical circuit is designed using low-power consumption, low heating, without matching somebody with somebody radiating element, the electricity of Fig. 5 power unit outside
Subcomponent is from being low-power consumption element, and power unit circuit design is low power consumption switch adjustment circuit, substantially without heat during operation
Source is produced, therefore without matching somebody with somebody radiating element outside.
The pulse period compensating controller includes short-circuit protection and warning circuit；
The power supply of pulse period compensating controller uses the power supplies of external AC 220V ± 20%, pulse period compensation
Controller, which is provided with, can externally export the DC power output end mouthful that 24V dc sources are powered to gas meter；
Pulse period compensating controller is provided with 0~300V pulse signal output ends mouthful, control plus smelly pump output 0~50
Beat/min, pulse signal width is 200ms, and peak value is 300V ± 20V, and low peak is 0V.
The pulse period compensating controller is provided with LCDs, and LCDs shows accumulative odorizing amount (unit
G), cumulative time (date Hour Minute Second), single odorizing amount (unit mg), natural clock date；Automatic servo antrol pattern shows
Show accumulative gas flow.
The pulse period compensating controller service data per hour automatic storage once, storage content include storage when
Between, accumulative odorizing amount；Service data amount of storage more than 35 days, artificial progress data storage is reset to add up again, without resetting
The stylish service data of operation covers the legacy data for updating substitution early stage automatically.
The pulse period compensating controller is provided with data communication interface and exports USB interface, number for service data
RS485 modbus communications protocol is used according to communication interface；Computer notebook or paid are using MODSCON test softwares to pulse
Period compensating controller operational factor is set, Read Controller operation history data.
Service data is automatically saved when the shutdown of pulse period compensating controller or power-off suddenly, starts shooting or restores electricity
When original operational mode, set operational factor do not change.Using having EEPROM functions in CPU, in running status
When changing, its running status is constantly automatically credited in EEPROM, and when shutting down or powering off suddenly, data have been stored in
In EEPROM, when starting shooting or restore electricity again, data are read by EEPROM, and are run automatically by data storage.Ensure to supply
Gas adds smelly synchronization and crash analysis to investigate and collect evidence.
The conversion relation of described plus smelly pump single output quantity and gas flow is：Q × S=D × F × 60
The addition of odorant in unit combustion gas, S-standard of odorizing：mg/m3；
Plus smelly pump single output quantity, D-single output quantity：Mg/ times；
Plus smelly pump maximum operating frequency, F-maximum operating frequency：Beat/min；
Combustion gas highest hour flow：Q-maximum gas flow：m3/h；
Set by button plus smelly pump maximum operating frequency.
Pulse period compensating controller changes according to gas flow and standard of odorizing is calculated plus the output times of smelly pump.Such as
Fruit parameter setting malfunctions or transfinited, pulse period compensating controller alarm parameter setting mistake.
As another preferred scheme, communications protocol stipulations of the present invention are as follows：
The pulse period compensating controller includes CPU, EEPROM, RS485 part, Power convert part, USB interface portion
Point, clock circuit, detection signal pulse importation, check valve drive control part plus smelly pump drive control part, button portion
Point and LCDs, CPU signal transmission port signal transmission port respectively with EEPROM, the signal of RS485 parts are passed
Defeated port, the signal transmission port of usb segment, the signal transmission port of clock circuit are connected, CPU detection signal input
Port is connected with the detection signal output port of detection signal pulse importation, the detection letter of detection signal pulse importation
Number input port is connected with the detection signal pulse output port of gas meter；
CPU operational factor sets input port to be connected with key part；
CPU control signal output mouth control signal input mouthful respectively with check valve drive control part plus smelly
The control signal input mouthful of pump drive control part is connected, and the control signal output mouthful of check valve drive control part is respectively
Control signal input mouthful, the control signal input of upper check valve mouthful with lower check valve are connected, plus smelly pump drive control part
The control signal output mouthful divided is with adding the control signal input mouthful of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part.
Data output interface can be connected with 485 communication ports, remote transmission accumulation odorizing amount and service data.
Pulse period compensating controller receives the control of gas-burning pulse flow signal plus smelly pump presses the output of setting output quantity plus smelly
Agent.
Pulse period compensating controller carries out accumulation storage to service data, can arrive external U by usb segment storage
In disk.
Key part can carry out system time setting, the setting of this station address, single dosing setting, match ratio setting, pulse
Follow-up flow setting, dosing frequency setting,
The CPU uses STC12C5A60S2 chip U1, and detection signal pulse importation uses TPL521 optocouplers U2, U2
1 pin connect 24V power supplys, U2 2 pin connect the detection signal pulse output port of gas meter by resistance R6, and U2 3 pin connect
Ground, U2 4 pin connect U1 12 pin.
Described plus smelly pump drive control part connects 5V power supplys using TPL521 optocouplers U3, U3 1 pin, and U3 2 pin were connected
Resistance R7 connects U1 34 pin, and U3 4 pin, 3 pin connect the control signal input mouthful for adding smelly pump.
1 pin that the check valve drive control part includes TPL521 optocoupler U7 and TPL521 optocouplers U13, U7 passes through resistance
R40 connects 3.3V power supplys, and 21 pin of U7 2 pin respectively with resistance R41 one end, electric capacity C35 one end, U1 are connected, the electric capacity C35 other ends
Ground connection, the resistance R41 other ends 3 pin respectively with U7, resistance R43 one end, resistance R42 one end are connected, U7 4 pin and P-12V ends
Be connected, the resistance R43 other ends are connected with electric capacity C39 one end, NPN triode Q2 base stages respectively, the electric capacity C39 other ends respectively with electricity
The R42 other ends, NPN triode Q2 emitter stages, ground wire is hindered to be connected, NPN triode Q2 colelctor electrodes respectively with resistance R44 one end, under
The control signal input mouthful of check valve is connected, and the resistance R44 other ends connect P-12V ends by LED D9；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end,
U1 22 pin are connected, electric capacity C79 other ends ground connection, 3 pin, resistance R83 one end, the resistance of the resistance R77 other ends respectively with U13
R80 one end be connected, U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3
Base stage is connected, and the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, the poles of NPN tri-
Control signal input mouthful of the pipe Q3 colelctor electrodes respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through
LED 15 connects P-12V ends.
The EEPROM includes 24C02 chips, and 1,2,3,4 pin of 24C02 chips are grounded, 5 pin of 24C02 chips respectively with
Resistance R2 one end, cpu signal transmission port are connected, and 6 pin of 24C02 chips connect 3.3V power supplys by resistance R1, and resistance R2 is another
End is connected with 3.3V power supplys, 8 pin of 24C02 chips, electric capacity C1 one end respectively, electric capacity C1 other ends ground connection.
1 pin that RS485 part includes MAX485E chips U5, U5 is connected with U1 10 pin, U5 2 pin respectively with U5
3 pin, U1 14 pin be connected, U5 4 pin are connected with U1 11 pin, and U5 5 pin are grounded, U5 6 pin respectively with resistance R14 mono-
End, coffret J7 A mouths are connected, and B mouths, U5 7 pin of the resistance R14 other ends respectively with coffret J7 are connected, U5 8 pin
Connect 5V power supplys.
1 pin of the Power convert part including LM2596 chip U9 and LM1117 chips U10, U9 respectively with diode
D12 negative electrodes, 12V power ends, electric capacity C44 positive poles, electric capacity C46 one end are connected, and diode D12 anodes connect switched power output,
Switching Power Supply input termination civil power；Electric capacity C44 negative poles, the electric capacity C46 other ends, U9 5 pin, U9 3 pin ground connection, U9 2 pin point
It is not connected with Schottky diode D13 negative electrodes, inductance L5 one end, Schottky diode D13 plus earths, the inductance L5 other ends point
3 pin not with electric capacity C50 positive poles, U9 4 pin, 5V power ends, electric capacity C52 one end, U10 are connected, electric capacity C50 negative poles, electric capacity C52
The 1 pin ground connection of the other end, U10；U10 2 pin are connected with electric capacity C53 one end, inductance L6 one end respectively, another terminations of electric capacity C53
Ground, the inductance L6 other ends are connected with 3.3V power ends, electric capacity C55 one end, resistance R46 one end respectively, another terminations of electric capacity C55
Ground, the resistance R46 other ends are grounded by LED D14.
The usb segment includes HEADER 14X2USB chips, and 2 pin of USB chips meet 3V3 by 0.47 μ F electric capacity
Power supply, 5 pin of USB chips connect U1 3 pin, and 4 pin, the 3V3 power supplys of 6 pin of USB chips respectively with U1 are connected, 9 pin of USB chips
11 pin with 10nF electric capacity one end, USB chips are connected respectively, 10nF electric capacity other end ground connection；13 pin of USB chips respectively with
12M crystal oscillators one end, the first 22pF electric capacity one end are connected, the first 22pF electric capacity other end ground connection, and the 12M crystal oscillators other end is respectively with the
Two 22pF electric capacity one end, 14 pin of USB chips are connected, and the 2nd 22pF electric capacity other end ground connection, 24 pin of USB chips are passed sequentially through
Reverse light emitting diode, 1K resistance connect 3V3 power supplys.
2,3 pin of the clock circuit including 1302 chip U4, U4 connect 32K768 crystal oscillators two ends, U4 5 pin respectively with electricity
Hinder R12 one end, U1 38 pin are connected, another termination 5V power supplys of resistance R12, U4 6 pin respectively with resistance R11 one end, U1 37
Pin is connected, another termination 5V power supplys of resistance R11, and 36 pin of U4 7 pin respectively with resistance R10 one end, U1 are connected, and resistance R10 is another
One termination 5V power supplys；U4 8 pin connect battery.
The key part includes KEYLEFT buttons, KEYUP buttons, KEYDOWN buttons, KEYSET buttons, KEYRIGHT
Button and KEYCHANGE buttons, 2 pin of the tie point of KEYLEFT buttons one respectively with resistance R2 one end, U1 are connected, and KEYLEFT is pressed
Another tie point ground connection of key；
5 pin of the tie point of KEYUP buttons one respectively with resistance R3 one end, U1 are connected, and another tie point of KEYUP buttons connects
Ground；
7 pin of the tie point of KEYDOWN buttons one respectively with resistance R4 one end, U1 are connected, another tie point of KEYDOWN buttons
Ground connection；
6 pin of the tie point of KEYSET buttons one respectively with resistance R5 one end, U1 are connected, and another tie point of KEYSET buttons connects
Ground；
8 pin of the tie point of KEYRIGHT buttons one respectively with resistance R1 one end, U1 are connected, another connection of KEYRIGHT buttons
Point ground connection；
1 pin of the tie point of KEYCHANGE buttons one respectively with resistance R2 one end, U1 is connected, another company of KEYCHANGE buttons
Contact is grounded；
The resistance R2 other ends, the resistance R3 other ends, the resistance R4 other ends, the resistance R5 other ends, the other end of resistance 1, resistance
The R2 other ends are connected.
The control signal input of the lower check valve mouthful and the control signal input of upper check valve mouthful using solid-state after
Electrical equipment.
23 pin of the U1 2 pin respectively with 521 optocoupler U19, electric capacity C102 one end are connected, electric capacity C102 other ends difference
Be connected with ground wire, U19 3 pin, U19 1 pin connects 3.3V power supplys by resistance R121, U19 4 pin by resistance R125 respectively with
Electric capacity C104 one end, PNP triode Q6 base stages be connected, the electric capacity C104 other ends respectively with ground wire, PNP triode Q6 colelctor electrode phases
Even, PNP triode Q6 emitter stages are connected with diode D18 anodes, relay K5 control ends one end respectively, diode D18 negative electrodes
Be connected respectively with the relay K5 control ends other end, POWER power ends, relay K5 controlled switch fixing ends, relay K5 by
Control switch first stirs termination P-12V ends, and the control of the magnetic valve of non-return filling is taken over control in the second struck side of relay K5 controlled switch
End, prevent recharge magnetic valve be arranged on check valve and add smelly pipeline between.Can be equipped with prevents the magnetic valve of recharge, CPU prisons
Survey plus smelly pump action feedback loop output signal break time, there is no output signal in setting time, relay K5 can control electromagnetism
Valve is closed, and prevents combustion gas recharge from occurring.When output signal is transmitted again, magnetic valve is opened immediately, continues to output odorant.
39 pin of the U1 are connected by resistance R9 with PNP triode Q2 base stage, and PNP triode Q2 emitter stage meets 5V
Power supply, PNP triode Q2 colelctor electrode connects buzzer positive pole, buzzer negative pole ground connection.Buzzer carries out fault alarm.
The LCDs uses OCMJ4X8C LCD MODULEs.
Present invention additionally comprises RS232 parts, RS232 parts include MAX3232C chips, 12,11 pin of MAX3232C chips
10,11 pin with U1 are connected respectively, 16 pin of MAX3232C chips respectively with 3.3V power supplys, electric capacity C3 one end, electric capacity C2 one end
Be connected, 2 pin of another termination MAX3232C chips of electric capacity C3, the electric capacity C2 other ends respectively with electric capacity C4 one end, ground wire,
15 pin of MAX3232C chips are connected, 6 pin of another termination MAX3232C chips of electric capacity C4；8 pin of MAX3232C chips pass through
Reverse TVS diode D2 ground connection, 7 pin of MAX3232C chips are grounded by reverse TVS diode D4, and the 13 of MAX3232C chips
Pin is grounded by reverse TVS diode D1, and 14 pin of MAX3232C chips are grounded by reverse TVS diode D3；MAX3232C
5 pin of chip are connected by electric capacity C6 with 4 pin of MAX3232C chips, 3 pin of MAX3232C chips by electric capacity C5 with
1 pin of MAX3232C chips is connected.
It is understood that above with respect to the specific descriptions of the present invention, being merely to illustrate the present invention and being not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still can be to present invention progress
Modification or equivalent substitution, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. natural gas point for plus smelly compensation supervising device, including CPU, EEPROM, RS485 part, Power convert part, USB connect
Oral area point, clock circuit, detection signal pulse importation, check valve drive control part plus smelly pump drive control part, press
Key section and LCDs, it is characterised in that CPU signal transmission port signal transmission port respectively with EEPROM,
The signal transmission port of RS485 parts, the signal transmission port of usb segment, the signal transmission port of clock circuit are connected,
CPU detection signal input port is connected with the detection signal output port of detection signal pulse importation, detects signal arteries and veins
The detection signal input port of importation is rushed with the detection signal pulse output port of gas meter to be connected；
CPU operational factor sets input port to be connected with key part；
CPU control signal output mouth drives with the control signal input mouthful plus smelly pump of check valve drive control part respectively
The control signal input mouthful of dynamic control section is connected, and the control signal output mouth of check valve drive control part is respectively with
Control signal input mouthful, the control signal input of upper check valve mouthful of check valve are connected, plus smelly pump drive control part
Control signal output mouthful is with adding the control signal input mouthful of smelly pump to be connected；
CPU power port is connected with the output port of power source of Power convert part.
2. natural gas point is for adding smelly compensation supervising device according to claim 1, it is characterised in that the CPU is used
STC12C5A60S2 chips U1.
3. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that the detection signal pulse
Importation connects 24V power supplys using TPL521 optocouplers U2, U2 1 pin, and U2 2 pin connect the detection of gas meter by resistance R6
Signal pulse output port, U2 3 pin ground connection, U2 4 pin connect U1 12 pin.
4. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that described plus smelly pump driving control
System part connects 5V power supplys using TPL521 optocouplers U3, U3 1 pin, and U3 2 pin connected 34 pin that resistance R7 meets U1, U3 4 pin,
3 pin connect the control signal input mouthful for adding smelly pump.
5. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that the check valve driving control
1 pin that system part includes TPL521 optocoupler U7 and TPL521 optocouplers U13, U7 connects 3.3V power supplys, U7 2 pin point by resistance R40
21 pin not with resistance R41 one end, electric capacity C35 one end, U1 are connected, electric capacity C35 other ends ground connection, resistance R41 other ends difference
3 pin, resistance R43 one end with U7, resistance R42 one end are connected, and U7 4 pin are connected with P-12V ends, resistance R43 other ends difference
Be connected with electric capacity C39 one end, NPN triode Q2 base stages, the electric capacity C39 other ends respectively with the resistance R42 other ends, NPN triode
Q2 emitter stages, ground wire be connected, NPN triode Q2 colelctor electrodes respectively with resistance R44 one end, the control signal input of lower check valve
Mouth is connected, and the resistance R44 other ends connect P-12V ends by LED D9；
U13 1 pin connects 3.3V power supplys by resistance R74, U13 2 pin respectively with resistance R77 one end, electric capacity C79 one end, U1
22 pin are connected, electric capacity C79 other ends ground connection, 3 pin, resistance R83 one end, the resistance R80 mono- of the resistance R77 other ends respectively with U13
End be connected, U13 4 pin are connected with P-12V ends, the resistance R83 other ends respectively with electric capacity C81 one end, NPN triode Q3 base stage phases
Even, the electric capacity C81 other ends are connected with the resistance R80 other ends, NPN triode Q3 emitter stages, ground wire respectively, NPN triode Q3 collection
Control signal input mouthful of the electrode respectively with resistance R86 one end, upper check valve is connected, and the resistance R86 other ends pass through LED 15
Connect P-12V ends.
6. natural gas point is for adding smelly compensation supervising device according to claim 1, it is characterised in that the EEPROM includes
24C02 chips, 1,2,3, the 4 pin ground connection of 24C02 chips, 5 pin of 24C02 chips are transmitted with resistance R2 one end, cpu signal respectively
Port is connected, and 6 pin of 24C02 chips connect 3.3V power supplys by resistance R1, the resistance R2 other ends respectively with 3.3V power supplys, 24C02
8 pin of chip, electric capacity C1 one end are connected, electric capacity C1 other ends ground connection.
7. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that the RS485 parts include
MAX485E chips U5, U5 1 pin are connected with U1 10 pin, and 3 pin, U1 14 pin of U5 2 pin respectively with U5 are connected, U5 4 pin
It is connected with U1 11 pin, U5 5 pin ground connection, the A mouths of U5 6 pin respectively with resistance R14 one end, coffret J7 are connected, resistance
B mouths, U5 7 pin of the R14 other ends respectively with coffret J7 are connected, and U5 8 pin connect 5V power supplys.
8. natural gas point is for adding smelly compensation supervising device according to claim 1, it is characterised in that the Power convert part
1 pin including LM2596 chip U9 and LM1117 chips U10, U9 respectively with diode D12 negative electrodes, 12V power ends, electric capacity C44
Positive pole, electric capacity C46 one end are connected, and diode D12 anodes connect switched power output, Switching Power Supply input termination civil power；Electric capacity
C44 negative poles, the electric capacity C46 other ends, U9 5 pin, U9 3 pin ground connection, U9 2 pin respectively with Schottky diode D13 negative electrodes, electricity
Feel L5 one end to be connected, Schottky diode D13 plus earths, the inductance L5 other ends respectively with electric capacity C50 positive poles, U9 4 pin, 5V
Power end, electric capacity C52 one end, U10 3 pin are connected, electric capacity C50 negative poles, the electric capacity C52 other ends, U10 1 pin ground connection；The 2 of U10
Pin is connected with electric capacity C53 one end, inductance L6 one end respectively, and electric capacity C53 other ends ground connection, the inductance L6 other ends are electric with 3.3V respectively
Source, electric capacity C55 one end, resistance R46 one end are connected, and electric capacity C55 other ends ground connection, the resistance R46 other ends pass through LED D14
Ground connection.
9. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that the usb segment bag
HEADER 14X2USB chips are included, 2 pin of USB chips connect 3V3 power supplys by 0.47 μ F electric capacity, and 5 pin of USB chips connect the 3 of U1
Pin, 4 pin, the 3V3 power supplys of 6 pin of USB chips respectively with U1 is connected, 9 pin of USB chips respectively with 10nF electric capacity one end, USB cores
11 pin of piece are connected, 10nF electric capacity other end ground connection；13 pin of USB chips respectively with 12M crystal oscillators one end, the first 22pF electric capacity one
End be connected, the first 22pF electric capacity other end ground connection, the 12M crystal oscillators other end respectively with the 2nd 22pF electric capacity one end, USB chips 14
Pin is connected, and the 2nd 22pF electric capacity other end ground connection, 24 pin of USB chips pass sequentially through reverse light emitting diode, 1K resistance and meet 3V3
Power supply.
10. natural gas point is for adding smelly compensation supervising device according to claim 2, it is characterised in that the clock circuit includes
1302 chip U4, U4 2,3 pin connect 32K768 crystal oscillators two ends, and 38 pin of U4 5 pin respectively with resistance R12 one end, U1 are connected, electricity
Another termination 5V power supplys of R12 are hindered, 37 pin of U4 6 pin respectively with resistance R11 one end, U1 are connected, and another termination 5V of resistance R11 are electric
Source, 36 pin of U4 7 pin respectively with resistance R10 one end, U1 are connected, another termination 5V power supplys of resistance R10；U4 8 pin connect battery.
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| US20090095351A1 (en) * | 2007-07-16 | 2009-04-16 | Boss Packaging Inc. | Pipeline additive control device and method |
| WO2010070288A2 (en) * | 2008-12-18 | 2010-06-24 | Bp Exploration Operating Company Limited | Fluid transmission control system and method |
| CN201636530U (en) * | 2009-12-14 | 2010-11-17 | 沈阳贝尔燃气有限公司 | Automatic fuel gas odorizing device |
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