CN105955333B - PH controllers - Google Patents
PH controllers Download PDFInfo
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- CN105955333B CN105955333B CN201610534540.7A CN201610534540A CN105955333B CN 105955333 B CN105955333 B CN 105955333B CN 201610534540 A CN201610534540 A CN 201610534540A CN 105955333 B CN105955333 B CN 105955333B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
- G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
Abstract
The invention discloses PH controllers.Existing PH controllers cost can also be controlled further.The temperature of the control module PH/ORP that gathers PH/ORP acquisition modules and the temperature collect module collection of the present invention is contrasted with base modules, and the code value that PH/ORP acquisition modules and temperature collect module collection are come up is converted into pH value by PH electrode algorithms；PH value is converted into 4 20mA pick-up electric currents by control module by PH/ORP pick-up output algorithms, and passes through pick-up output module teletransmission；Control module exports pH value by standard MODBUS protocol conversions, and by RS485 communication modules；The buzzer warning of control module control buzzer module and the light emitting diode of police instruction module.The electric current pick-up output of the present invention uses pwm modes, and precision, which but surmounts in D/A modes, power module, also saves isolation module, substantially reduces cost.
Description
Technical field
The invention belongs to control technology field, and in particular to the small PH controls of a kind of low cost, electric current pick-up output degree of disturbance
Device processed.
Background technology
PH controllers are one of a intelligent online chemical analysis instruments, be widely used in thermoelectricity, chemical industry chemical fertilizer, metallurgy,
The continuous monitoring of pH value or OPR values and temperature in the solution such as environmental protection, pharmacy, biochemistry, food and running water.
External PH controller stabilization times are short, but cost is higher；In the fields such as sewage disposal, to the steady of PH controllers
Fixing time, requirement is not high, and the PH controllers of high cost can increase business burden, therefore, and external PH controllers are to sewage disposal
It is not a selection well Deng field.
Although the PH controllers of domestic production have price advantage, but cost can also be controlled further in fact, so as to be lifted
The competitiveness of domestic PH controllers.For example, either external or the country PH controllers, the output of electric current pick-up is all to use D/
A modes, although D/A modes precision is high, price is also higher than pwm mode.If also can be by electric current pick-up using pwm modes
The precision improvement of output extremely compares favourably with D/A modes, or even surmounts D/A modes, and this brings the cost control for PH controllers
Huge breakthrough.For another example, either external or the country PH controllers, existing power module will be interior using isolation module
Portion's power supply module and externally fed module are isolated, however isolation module be in power module in addition to transformer price highest,
The isolation voltage highest of existing isolation module is also with regard to 5000V or so, if isolation module, which is saved, can also function well as isolation mode
The effect (reaching 5000V isolation voltages) of block, this also undoubtedly greatly reduces the cost of PH controllers.For single PH controllers
For, using pwm modes and remove isolation module and can save 20 yuan or so, if producing in enormous quantities, then the benefit of whole order
It is huge with competitiveness.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art that, there is provided a kind of PH controllers, can save 20 yuan or so
Cost, and isolation voltage output at present needs to use voltage isolation module, this module is plus the universal valency in peripheral circuit market
Lattice are in 20-30 members.
The present invention includes control module, PH/ORP acquisition modules, temperature collect module, man-machine interface, running status and indicated
Module, base modules, LDO Voltage stabilizing modules, police instruction module, buzzer module, RS485 communication modules, pick-up output mould
Block, negative pressure conversion module, master control system filtration module and alarm relay module；Described control module control police instruction mould
The light emitting diode light on and off of block；Man-machine interface is connected with control module.
Described control module includes main control chip U5, the 8th resistance R8 and the 9th resistance R9；Main control chip U5 model
For STM8L052R8；Main control chip U5 6 pins connect the 9th resistance R9 one end, and 7 pins connect the 8th resistance R8 one end, and 13 draw
Pin connects master control system filtration module, and 11 pins, 55 pins, 29 pins and 12 pins connect+3.3V supply voltages, 10 pins, 56
Pin, 30 pins and 9 pins meet DGND.
Described temperature collect module includes the first operational amplifier U4, the 4th resistance R4, the 5th resistance R5, the 6th resistance
R6, the 4th electric capacity C4, the 12nd electric capacity C12, the 13rd electric capacity C13, the 30th electric capacity C30 and the 31st electric capacity C31；Master control
Chip U5 48 pins connect the 4th resistance R4 one end and the 12nd electric capacity C12 one end；12nd electric capacity C12 another termination
DGND；4th resistance R4 the first operational amplifier of another termination U4 output end and inverting input；First operational amplifier
U4 normal phase input end connects the 5th resistance R5 one end, the 13rd electric capacity C13 of positive supply input termination one end and negative pressure conversion
+ 5V the supply voltages of module output, the 4th electric capacity C4 of negative supply input termination one end and the -5V of negative pressure conversion module output are supplied
Piezoelectric voltage；13rd electric capacity C13 and the 4th electric capacity C4 other end meets DGND；The 5th resistance R5 resistance of another termination the 6th
R6 one end, the 31st electric capacity C31 one end, one end of the 30th electric capacity C30 one end and temperature sensor NTC resistance；
+ 2.5V the reference voltages of another termination base modules output of temperature sensor NTC resistance；6th resistance R6, the 31st electricity
The other end for holding C31 and the 30th electric capacity C30 meets DGND.
Described PH/ORP acquisition modules include the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the tenth
Three resistance R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 37th resistance R17, the 37th
Resistance R37, the 14th electric capacity C14, the 15th electric capacity C15, the 16th electric capacity C16, the 17th electric capacity C17, the 18th electric capacity
C18, the 19th electric capacity C19, the 20th electric capacity C20, the 21st electric capacity C21, the 32nd electric capacity C32, the second operation amplifier
Device U7 and follower U8；Follower U8 model CA3140；Main control chip U5 39 pins connect the 19th electric capacity C19 one end
And the 13rd resistance R13 one end；19th electric capacity C19 another termination DGND；13rd resistance R13 another termination second
One end of operational amplifier U7 output end, the 17th resistance R17 one end and the 32nd electric capacity C32；16th resistance R16
Termination a 17th resistance R17 other end, the 32nd electric capacity C32 other end and the second operational amplifier U7 it is anti-phase
Input, another termination DGND；Second operational amplifier U7 normal phase input end connects the 17th electric capacity C17, the 16th electric capacity
C16, the 15th resistance R15, the 14th resistance R14 and the tenth resistance R10 one end；Second operational amplifier U7 positive supply is defeated
Enter the 15th electric capacity C15 of termination one end and connect the+5V supply voltages of negative pressure conversion module output, negative supply input termination second
Ten electric capacity C20 one end and the -5V supply voltages of negative pressure conversion module output；15th electric capacity C15, the 16th electric capacity C16,
17 electric capacity C17, the 20th electric capacity C20 and the 15th resistance the R15 other end meet DGND；The tenth resistance R10 other end
Connect the 11st resistance R11 and the 37th resistance R37 one end；11st resistance R11 another termination base modules output+
2.5V reference voltage；37th resistance R37 another termination DGND；14th resistance R14 another termination follower U8's
Output end and inverting input；Follower U8 normal phase input end connects the 12nd resistance R12 and the 18th electric capacity C18 one end,
The output end of 12nd resistance R12 another termination PH/ORP sensors；Follower U8 negative supply input termination the 21st
Electric capacity C21 one end and the -5V supply voltages for connecing the output of negative pressure conversion module, the 14th electric capacity C14's of positive supply input termination
One end and the+5V supply voltages for connecing the output of negative pressure conversion module；14th electric capacity C14, the 18th electric capacity C18, the 21st electricity
The other end for holding C21 meets DGND.
Described negative pressure conversion module includes DC-DC conversion chips U2, the 3rd electric capacity C3, the 9th electric capacity C9 and the tenth electric capacity
C10；DC-DC conversion chips U2 model ICL7660；DC-DC conversion chips U2 8 pins connect the 3rd electric capacity C3 one end simultaneously
Output+5V supply voltages, 5 pins connect the tenth electric capacity C10 one end and output -5V supply voltages, and 2 pins connect the 9th electric capacity C9's
One end, 4 pins connect the 9th electric capacity C9 other end；DC-DC conversion chips U2 3 pins, the 3rd electric capacity C3 and the tenth electric capacity C10
The other end meet DGND；DC-DC conversion chips U2 1,6 and 7 pins are hanging.
Described base modules include 3rd resistor R3 and the first fiducial chip U3；First fiducial chip U3 model
TL431；The positive pole of voltage-stabiliser tube meets DGND in first fiducial chip U3, and negative pole connects 3rd resistor R3 one end and output+2.5V bases
Quasi- voltage；3rd resistor R3 another termination+3.3V supply voltages.
Described LDO Voltage stabilizing modules include LDO linear voltage stabilization chips U1, the 5th electric capacity C5 and the 6th electric capacity C6；LDO is linear
Voltage stabilizing chip U1 model LM7824；LDO linear voltage stabilization chips U1 3 pins meet the 6th electric capacity C6 one end and output+5V
Supply voltage, 1 pin connects the 5th electric capacity C5 one end and connects+24V supply voltages, and 4 pins connect the 6th electric capacity C6 and the 5th electric capacity
The C5 other end simultaneously meets AGND.
Described master control system filtration module includes the first electric capacity C1, the second electric capacity C2, the 7th electric capacity C7, the 8th electric capacity C8
With the 11st electric capacity C11；First electric capacity C1, the second electric capacity C2, the 7th electric capacity C7 and the 8th electric capacity C8 one end connect+3.3V confessions
Piezoelectric voltage, the other end connects the 11st electric capacity C11 one end and meets DGND；11st electric capacity C11 another termination base modules
+ 2.5V the reference voltages of output and 13 pins for meeting main control chip U5.
Described buzzer module include the first triode Q1, first resistor R1, second resistance R2, the first diode D1 and
Buzzer Sp1；A second resistance R2 termination main control chip U5 4 pins, another termination first resistor R1 one end and first
Triode Q1 base stage；+ 5V the supply voltages of first resistor R1 another termination negative pressure conversion module output；First triode Q1
Emitter stage connect the+5V supply voltages of negative pressure conversion module output, colelctor electrode connects the first diode D1 negative terminal and buzzer Sp1
Negative terminal；First diode D1 anode and buzzer Sp1 anode meet DGND.
Described running status indicating module includes light emitting diode D2 and the 7th resistance R7；Light emitting diode D2 positive pole
+ 3.3V supply voltages are connect, negative pole connects the 7th resistance R7 one end；7th resistance R7 another termination main control chip U5 3 pins.
Described RS485 communication modules include the first isolation optocoupler U12, the second isolation optocoupler U15,485 communication chips
U14, photoisolator U16, the 22nd resistance R22, the 23rd resistance R23, the 28th resistance R28, the 31st electricity
Hinder R31, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the 35th resistance R35, the 30th
Six resistance R36 and the 26th electric capacity C26；First isolation optocoupler U12 and the second isolation optocoupler U15 model are 6N137；
485 communication chip U14 model MAX485；Photoisolator U16 model ACPL-217-56BE；First isolation optocoupler
U12 2 pins connect the 23rd resistance R23 one end, and 3 pins connect main control chip U5 58 pins, and it is defeated that 8 pins connect Voltage stabilizing module
+ 5V the supply voltages gone out, 6 pins connect the 22nd resistance R22 one end, 485 communication chip U14 1 pin and meet AGND, and 5
Pin meets AGND；23rd resistance R23 another termination+3.3V supply voltages；First isolation optocoupler U12 1 pin, 4 are drawn
Pin and 7 pins are hanging；+ 5V the supply voltages of 22nd resistance R22 another termination LDO Voltage stabilizing modules output；Second every
8 pins from optocoupler U15 connect the+5V supply voltages of negative pressure conversion module output, and 7 pins connect main control chip U5 57 pins, and 6 draw
Pin connects one end of the 34th resistance R34, and 2 pins connect the 31st resistance R31 one end, and 3 pins meet 485 communication chip U14
4 pins, 5 pins meet DGND, and 1 pin and 4 pins are hanging；Another termination+3.3V of 34th resistance R34 powers electricity
Pressure；+ 5V the supply voltages of 32nd resistance R31 another termination Voltage stabilizing module output；485 communication chip U14 2 pins and
3 pins connect the 32nd resistance R32 one end and photoisolator U16 the 4th pin, and 8 pins meet the 26th electric capacity C26
One end, the 28th resistance R28 one end and the+5V supply voltages for connecing Voltage stabilizing module output, 7 pin connect external communication device
One end of one end, the 28th resistance R28 other end and the 33rd resistance R33,6 pins meet the another of external communication device
End, 5 pins connect the 36th resistance R36 one end and meet AGND；The 36th resistance R36 resistance of another termination the 33rd
The R33 other end；26th electric capacity C26 another termination AGND；Phototube Coupling U16 the 1st pin connects the 35th resistance
R35 one end, the 2nd pin connects main control chip U5 59 pins, and the 3rd pin meets AGND；35th resistance R35 another termination
+ 3.3V supply voltages；+ 5V the supply voltages of 32nd resistance R32 another termination Voltage stabilizing module output.
Described pick-up output module include the 3rd isolation optocoupler U9, the first PNP triode Q3, the second PNP triode Q4,
NPN triode Q2, logical AND gate U11, the second fiducial chip U13, the second operational amplifier U10A and voltage-regulator diode Z1；3rd
Isolate optocoupler U9 model HCPL-M453-500E, the second fiducial chip U13 model TL431ACDBZR, logical AND gate
U11 model SN74AHC1G08DBVR, the second operational amplifier U10A model LM358DR；3rd isolation optocoupler U9's
1st pin connects the 20th resistance R20 one end, the 3rd pin connect the 22nd electric capacity C22 one end, voltage-regulator diode Z1 it is negative
Pole simultaneously connects+24V supply voltages, and the 5th pin connects the first PNP triode Q3 colelctor electrode, and the 6th pin meets the 21st resistance R21
One end and logical AND gate U11 1 pin and 2 pins, the 4th pin connects the 30th resistance R30 one end, the second fiducial chip
3 pins of the positive pole of voltage-stabiliser tube, the 27th electric capacity C27 one end and logical AND gate U11 in U13；20th resistance R20's is another
One termination+3.3V supply voltages；A 25th resistance R25 first PNP triode Q3 of termination base stage, another termination second
19 resistance R29 one end and main control chip U5 8 pins；First PNP triode Q3 emitter stage and the 29th resistance R29
The other end meet DGND；22nd electric capacity C22 and the 30th resistance R30 other end meets AGND；Voltage-regulator diode Z1
Positive pole meet negative pole, the 23rd electric capacity C23 of voltage-stabiliser tube in the 21st resistance R21 other end, the second fiducial chip U13
One end, the 24th electric capacity C24 one end, the 27th electric capacity C27 other end, the 18th electric capacity R18 one end and patrol
Collect 5 pins with door U11；23rd electric capacity C23 the resistance R26's of another termination the 26th and the 27th resistance R27
One end；26th resistance R26 another termination logical AND gate U11 4 pins；24th electric capacity C24 another termination
3 pins of the 27 resistance R27 other end, the 28th electric capacity C28 one end and the second operational amplifier U10A；20th
Eight electric capacity C28 the second operational amplifier of another termination U10A 2 pins, the 19th resistance R19 one end and the 25th electricity
Hold C25 one end；Second operational amplifier U10A 4 pins meet AGND, 1 pin connect the 25th electric capacity C25 the other end and
24th resistance R24 one end, 8 pins connect the 29th electric capacity C29 one end and connect+24V supply voltages；29th electricity
Hold C29 another termination AGND；24th resistance R24 another termination NPN triode Q2 base stage；NPN triode Q2's
Emitter stage connects the colelctor electrode of the 18th resistance R18 other end, the 19th resistance R19 other end and the second PNP triode Q4,
Colelctor electrode connects the second PNP triode Q4 base stage；Second PNP triode Q4 emitter stage is used as pick-up output end IOut.
Described alarm relay module includes the first relay RE1, the second relay RE2, the 5th triode Q5, the 6th
Triode Q6, the 3rd diode D3, the 4th diode D4, the 37th resistance R37, the 38th resistance R38, the 39th electricity
Hinder R39 and the 40th resistance R40；First relay RE1 and the second relay RE2 model are HF32F/005-HS3, the 5th
Triode Q5 and the 6th triode Q6 model are BC857CLT1G；First relay RE1 the 1st pin meets DGND, and the 2nd draws
Pin connects the 3rd diode D3 negative pole and the 5th triode Q5 colelctor electrode, and the 3rd pin and the 4th pin pass through alarm terminals CN2
Connect external alert device；5th triode Q5 emitter stage connects the+5V supply voltages of negative pressure conversion module output, and base stage connects the 30th
Seven resistance R37 one end and the 38th resistance R38 one end；37th resistance R37 another termination negative pressure conversion module
The 9th resistance R9 other end in the+5V supply voltages of output, the 38th resistance R38 another termination control module.Second
Relay RE2 the 1st pin meets DGND, and the 2nd pin connects the 4th diode D4 negative pole and the 6th triode Q6 colelctor electrode, the
3 pins and the 4th pin connect external alert device by alarm terminals CN2；6th triode Q6 emitter stage connects negative pressure conversion module
+ 5V the supply voltages of output, base stage connects the 40th resistance R40 one end and the 39th resistance R39 one end, the 40th resistance
+ 5V the supply voltages of R40 another termination negative pressure conversion module output, the 39th resistance R39 another termination control module
In the 8th resistance R8 the other end；3rd diode D3 and the 4th diode D4 positive pole is grounded.
The main control chip U5 1,2,5,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,
31、32、33、34、35、36、37、38、40、41、42、43、44、45、46、47、49、50、51、52、53、54、60、61、62、63
It is hanging with 64 pins.
Described pick-up output module also includes the 3rd operational amplifier U10B, the 3rd operational amplifier U10B model
LM358DR.3rd operational amplifier U10B the 5th pin is connected to AGND, and the 6th pin is connected to the 7th pin.
Beneficial effects of the present invention：
1st, continuous monitoring data of the present invention, and Remote monitoring and record are realized by electric current pick-up output linkage record instrument,
RS485 interfaces can also be connected computer realization monitoring and record are conveniently connected to by MODBUS rtu protocols.
2nd, the present invention is smaller using pick-up output or isolation RS 485 communication, degree of disturbance is galvanically isolated.
3rd, electric current pick-up of the invention output uses pwm modes, and precision has but surmounted also to be saved in D/A modes, power module
Isolation module is removed, cost is substantially reduced.
4th, the present invention combines international supply standard according to water and wastewater industry environment and feature, adds low voltage DC 24V.
5th, board card moduleization design of the present invention, assembling configuration more facilitates.
6th, the present invention can carry out PH/ORP measurement, temperature survey, bound control, pick-up output, RS485 communications.
7th, configuration temperature of the present invention manually, automatic compensation function；High and low warning function and amount of hysteresis are set；Buzzing is set
Device, light warning switching function；Increase universal password function；Industry Control formula house dog, it is ensured that instrument will not crash.
Brief description of the drawings
Fig. 1 is system entire block diagram of the invention；
Fig. 2 is the circuit diagram of control module in the present invention；
Fig. 3 is the circuit diagram of temperature collect module in the present invention；
Fig. 4 is the circuit diagram of PH/ORP acquisition modules in the present invention；
Fig. 5 is the circuit diagram of negative pressure conversion module in the present invention；
Fig. 6 is the circuit diagram of base modules in the present invention；
Fig. 7 is the circuit diagram of LDO Voltage stabilizing modules in the present invention；
Fig. 8 is the circuit diagram of master control system filtration module in the present invention；
Fig. 9 is the circuit diagram of buzzer module in the present invention；
Figure 10 is the circuit diagram of running status indicating module in the present invention；
Figure 11 is the circuit diagram of RS485 communication modules in the present invention；
Figure 12 is the circuit diagram of pick-up output module in the present invention；
Figure 13 is the circuit diagram of repeat circuit alarm module of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, PH controllers include control module 1, PH/ORP acquisition modules 2, temperature collect module 3, man-machine boundary
Face 4, running status indicating module 5, base modules 6, LDO Voltage stabilizing modules 7, police instruction module 8, buzzer module 9, RS485
Communication module 10, pick-up output module 11, negative pressure conversion module, master control system filtration module and alarm relay module；Control
The light emitting diode light on and off of the control police instruction of module 1 module 8；Man-machine interface 4 is connected with control module.
As shown in Fig. 2 control module 1 includes main control chip U5, the 8th resistance R8 and the 9th resistance R9；Main control chip U5's
Model STM8L052R8；Main control chip U5 6 pins connect the 9th resistance R9 one end, and 7 pins connect the 8th resistance R8 one end,
13 pins connect master control system filtration module, and 11 pins, 55 pins, 29 pins and 12 pins connect+3.3V supply voltages, and 10 draw
Pin, 56 pins, 30 pins and 9 pins meet DGND.Main control chip U5 1,2,5,14,15,16,17,18,19,20,21,
22、23、24、25、26、27、28、31、32、33、34、35、36、37、38、40、41、42、43、44、45、46、47、49、50、
51st, 52,53,54,60,61,62,63 and 64 pins are hanging.
As shown in figure 3, temperature collect module 3 includes the first operational amplifier U4, the 4th resistance R4, the 5th resistance R5, the
Six resistance R6, the 4th electric capacity C4, the 12nd electric capacity C12, the 13rd electric capacity C13, the 30th electric capacity C30 and the 31st electric capacity
C31；Main control chip U5 48 pins connect the 4th resistance R4 one end and the 12nd electric capacity C12 one end；12nd electric capacity C12's
Another termination DGND；4th resistance R4 the first operational amplifier of another termination U4 output end and inverting input；First fortune
The normal phase input end for calculating amplifier U4 connects the 5th resistance R5 one end, the 13rd electric capacity C13 of positive supply input termination one end and
+ 5V the supply voltages of negative pressure conversion module output, the 4th electric capacity C4 of negative supply input termination one end and negative pressure conversion module are defeated
- 5V the supply voltages gone out；13rd electric capacity C13 and the 4th electric capacity C4 other end meets DGND；The 5th resistance R5 other end
Connect the 6th resistance R6 one end, the 31st electric capacity C31 one end, the 30th electric capacity C30 one end and temperature sensor NTC electricity
One end of resistance；+ 2.5V the reference voltages of another termination base modules output of temperature sensor NTC resistance；6th resistance R6,
31 electric capacity C31 and the 30th electric capacity C30 other end meets DGND.
As shown in figure 4, PH/ORP acquisition modules 2 include the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12,
13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 37th resistance R17, the 3rd
17 resistance R37, the 14th electric capacity C14, the 15th electric capacity C15, the 16th electric capacity C16, the 17th electric capacity C17, the 18th electricity
Appearance C18, the 19th electric capacity C19, the 20th electric capacity C20, the 21st electric capacity C21, the 32nd electric capacity C32, the second computing are put
Big device U7 and follower U8；Follower U8 model CA3140；Main control chip U5 39 pins connect the one of the 19th electric capacity C19
End and the 13rd resistance R13 one end；19th electric capacity C19 another termination DGND；13rd resistance R13 another termination
One end of two operational amplifier U7 output end, the 17th resistance R17 one end and the 32nd electric capacity C32；16th resistance
The one of R16 terminates the 17th resistance R17 other end, the 32nd electric capacity C32 other end and the second operational amplifier U7
Inverting input, another termination DGND；Second operational amplifier U7 normal phase input end connects the 17th electric capacity C17, the 16th electricity
Hold C16, the 15th resistance R15, the 14th resistance R14 and the tenth resistance R10 one end；Second operational amplifier U7 positive supply
The 15th electric capacity C15 of input termination one end simultaneously connects the+5V supply voltages of negative pressure conversion module output, negative supply input termination the
20 electric capacity C20 one end and the -5V supply voltages of negative pressure conversion module output；15th electric capacity C15, the 16th electric capacity C16,
17th electric capacity C17, the 20th electric capacity C20 and the 15th resistance the R15 other end meet DGND；Tenth resistance R10's is another
Terminate the 11st resistance R11 and the 37th resistance R37 one end；11st resistance R11 another termination base modules output
+ 2.5V reference voltages；37th resistance R37 another termination DGND；14th resistance R14 another termination follower U8
Output end and inverting input；Follower U8 normal phase input end meets the one of the 12nd resistance R12 and the 18th electric capacity C18
End, the output end of the 12nd resistance R12 another termination PH/ORP sensors；Follower U8 negative supply input termination the 20th
One electric capacity C21 one end and the -5V supply voltages for connecing the output of negative pressure conversion module, the 14th electric capacity C14 of positive supply input termination
One end and connect negative pressure conversion module output+5V supply voltages；14th electric capacity C14, the 18th electric capacity C18, the 21st
The electric capacity C21 other end meets DGND.
As shown in figure 5, negative pressure conversion module includes DC-DC conversion chips U2, the 3rd electric capacity C3, the 9th electric capacity C9 and the tenth
Electric capacity C10；DC-DC conversion chips U2 model ICL7660；DC-DC conversion chips U2 8 pins connect the one of the 3rd electric capacity C3
Hold and export+5V supply voltages, 5 pins connect the tenth electric capacity C10 one end and output -5V supply voltages, 2 pins connect the 9th electric capacity
C9 one end, 4 pins connect the 9th electric capacity C9 other end；DC-DC conversion chips U2 3 pins, the electricity of the 3rd electric capacity C3 and the tenth
The other end for holding C10 meets DGND；DC-DC conversion chips U2 1,6 and 7 pins are hanging.
As shown in fig. 6, base modules 6 include 3rd resistor R3 and the first fiducial chip U3；First fiducial chip U3 type
Number be TL431；The positive pole of voltage-stabiliser tube meets DGND in first fiducial chip U3, negative pole connect 3rd resistor R3 one end and output+
2.5V reference voltage；3rd resistor R3 another termination+3.3V supply voltages.
As shown in fig. 7, LDO Voltage stabilizing modules 7 include LDO linear voltage stabilization chips U1, the 5th electric capacity C5 and the 6th electric capacity C6；
LDO linear voltage stabilization chips U1 model LM7824；LDO linear voltage stabilization chips U1 3 pins connect the 6th electric capacity C6 one end simultaneously
Output+5V supply voltages, 1 pin connects the 5th electric capacity C5 one end and connects+24V supply voltages, and 4 pins meet the 6th electric capacity C6 and
The five electric capacity C5 other end simultaneously meets AGND.
As shown in figure 8, master control system filtration module includes the first electric capacity C1, the second electric capacity C2, the 7th electric capacity C7, the 8th electricity
Hold C8 and the 11st electric capacity C11；First electric capacity C1, the second electric capacity C2, the 7th electric capacity C7 and the 8th electric capacity C8 one end connect+
3.3V supply voltages, the other end connects the 11st electric capacity C11 one end and meets DGND；11st electric capacity C11 another termination base
+ 2.5V the reference voltages of quasi-mode block output and 13 pins for meeting main control chip U5.
As shown in figure 9, buzzer module 9 include the first triode Q1, first resistor R1, second resistance R2, the one or two grade
Pipe D1 and buzzer Sp1；A second resistance R2 termination main control chip U5 4 pins, another termination first resistor R1 one end
And first triode Q1 base stage；+ 5V the supply voltages of first resistor R1 another termination negative pressure conversion module output；First
Triode Q1 emitter stage connect negative pressure conversion module output+5V supply voltages, colelctor electrode connect the first diode D1 negative terminal and
Buzzer Sp1 negative terminal；First diode D1 anode and buzzer Sp1 anode meet DGND.
As shown in Figure 10, running status indicating module 5 includes light emitting diode D2 and the 7th resistance R7；Light emitting diode D2
Positive pole connect+3.3V supply voltages, negative pole connects the 7th resistance R7 one end；7th resistance R7 another termination main control chip U5's
3 pins.
As shown in figure 11, RS485 communication modules 10 include the first isolation optocoupler U12, the second isolation optocoupler U15,485 communications
Chip U14, photoisolator U16, the 22nd resistance R22, the 23rd resistance R23, the 28th resistance R28, the 30th
One resistance R31, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the 35th resistance R35,
36 resistance R36 and the 26th electric capacity C26；First isolation optocoupler U12 and the second model for isolating optocoupler U15 are
6N137；485 communication chip U14 model MAX485；Photoisolator U16 model ACPL-217-56BE；First every
2 pins from optocoupler U12 connect the 23rd resistance R23 one end, and 3 pins connect main control chip U5 58 pins, and 8 pins connect voltage stabilizing
+ 5V the supply voltages of module output, 6 pins connect the 22nd resistance R22 one end, 485 communication chip U14 1 pin and connect
AGND, 5 pins meet AGND；23rd resistance R23 another termination+3.3V supply voltages；Draw the 1 of first isolation optocoupler U12
Pin, 4 pins and 7 pins are hanging；+ 5V the supply voltages of 22nd resistance R22 another termination LDO Voltage stabilizing modules output；
Second isolation optocoupler U15 8 pins connect the+5V supply voltages of negative pressure conversion module output, and what 7 pins met main control chip U5 57 draws
Pin, 6 pins connect one end of the 34th resistance R34, and 2 pins connect the 31st resistance R31 one end, and 3 pins connect 485 communication cores
Piece U14 4 pins, 5 pins meet DGND, and 1 pin and 4 pins are hanging；Another termination+3.3V of 34th resistance R34 is supplied
Piezoelectric voltage；+ 5V the supply voltages of 32nd resistance R31 another termination Voltage stabilizing module output；Draw the 2 of 485 communication chip U14
Pin and 3 pins connect the 32nd resistance R32 one end and photoisolator U16 the 4th pin, and 8 pins connect the 26th electricity
Hold C26 one end, the 28th resistance R28 one end and the+5V supply voltages for connecing Voltage stabilizing module output, 7 pin connect PERCOM peripheral communication
One end of one end of equipment, the 28th resistance R28 other end and the 33rd resistance R33,6 pins connect external communication device
The other end, 5 pins connect the 36th resistance R36 one end and meet AGND；36th resistance R36 another termination the 30th
The three resistance R33 other end；26th electric capacity C26 another termination AGND；Phototube Coupling U16 the 1st pin connects the 30th
Five resistance R35 one end, the 2nd pin connects main control chip U5 59 pins, and the 3rd pin meets AGND；35th resistance R35's is another
One termination+3.3V supply voltages；+ 5V the supply voltages of 32nd resistance R32 another termination Voltage stabilizing module output.
As shown in figure 12, pick-up output module 11 includes the 3rd isolation optocoupler U9, the first PNP triode Q3, the 2nd PNP tri-
Pole pipe Q4, NPN triode Q2, logical AND gate U11, the second fiducial chip U13, the second operational amplifier U10A and voltage-regulator diode
Z1, in addition to the 3rd operational amplifier U10B (model LM358DR)；3rd isolation optocoupler U9 model HCPL-M453-
500E, the second fiducial chip U13 model TL431ACDBZR, logical AND gate U11 model SN74AHC1G08DBVR, the
Two operational amplifier U10A model LM358DR；3rd isolation optocoupler U9 the 1st pin connects the 20th resistance R20 one end,
3rd pin connects the 22nd electric capacity C22 one end, voltage-regulator diode Z1 negative pole and connects+24V supply voltages, and the 5th pin connects
One PNP triode Q3 colelctor electrode, the 6th pin connects the 21st resistance R21 one end and logical AND gate U11 1 pin and 2 draws
Pin, the 4th pin meets positive pole, the 27th electric capacity C27 of voltage-stabiliser tube in the 30th resistance R30 one end, the second fiducial chip U13
One end and logical AND gate U11 3 pins；20th resistance R20 another termination+3.3V supply voltages；25th resistance
A R25 first PNP triode Q3 of termination base stage, another resistance R29 of termination the 29th one end and the 8 of main control chip U5
Pin；First PNP triode Q3 emitter stage and the 29th resistance R29 other end meet DGND；22nd electric capacity C22
And the 30th the resistance R30 other end meet AGND；Voltage-regulator diode Z1 positive pole connect the 21st resistance R21 the other end,
The negative pole of voltage-stabiliser tube, the 23rd electric capacity C23 one end, the 24th electric capacity C24 one end, in second fiducial chip U13
5 pins of the 27 electric capacity C27 other end, the 18th electric capacity R18 one end and logical AND gate U11；23rd electric capacity C23
The resistance R26 of another termination the 26th and the 27th resistance R27 one end；26th resistance R26 another termination is patrolled
Collect 4 pins with door U11；The 24th electric capacity C24 resistance R27 of another termination the 27th other end, the 28th electricity
Hold C28 one end and the second operational amplifier U10A 3 pins；The 28th electric capacity C28 operation amplifier of another termination second
One end of device U10A 2 pins, the 19th resistance R19 one end and the 25th electric capacity C25；Second operational amplifier U10A's
4 pins meet AGND, and 1 pin connects the 25th electric capacity C25 other end and the 24th resistance R24 one end, and 8 pins connect second
19 electric capacity C29 one end simultaneously connects+24V supply voltages；29th electric capacity C29 another termination AGND；24th resistance
R24 another termination NPN triode Q2 base stage；NPN triode Q2 emitter stage connects the 18th resistance R18 other end,
The colelctor electrode of the 19 resistance R19 other end and the second PNP triode Q4, colelctor electrode connects the second PNP triode Q4 base stage；The
Two PNP triode Q4 emitter stage is used as pick-up output end IOut.3rd operational amplifier U10B the 5th pin is connected to AGND,
6th pin is connected to the 7th pin.
As shown in figure 13, alarm relay module includes the first relay RE1, the second relay RE2, the 5th triode
Q5, the 6th triode Q6, the 3rd diode D3, the 4th diode D4, the 37th resistance R37, the 38th resistance R38,
39 resistance R39 and the 40th resistance R40；First relay RE1 and the second relay RE2 model are HF32F/005-
HS3, the 5th triode Q5 and the 6th triode Q6 model are BC857CLT1G；First relay RE1 the 1st pin connects
DGND, the 2nd pin connects the 3rd diode D3 negative pole and the 5th triode Q5 colelctor electrode, and the 3rd pin and the 4th pin pass through report
Alert terminal CN2 connects external alert device；5th triode Q5 emitter stage connects the+5V supply voltages of negative pressure conversion module output, base
Pole connects the 37th resistance R37 one end and the 38th resistance R38 one end；37th resistance R37 another termination is born
The 9th resistance R9's is another in the+5V supply voltages for pressing conversion module to export, the 38th resistance R38 another termination control module
One end.Second relay RE2 the 1st pin meets DGND, and the 2nd pin connects the 4th diode D4 negative pole and the 6th triode Q6
Colelctor electrode, the 3rd pin and the 4th pin connect external alert device by alarm terminals CN2；6th triode Q6 emitter stage connects negative pressure
+ 5V the supply voltages of conversion module output, base stage connects the 40th resistance R40 one end and the 39th resistance R39 one end, the
+ 5V the supply voltages of 40 resistance R40 another termination negative pressure conversion module output, the 39th resistance R39 another termination
The 8th resistance R8 other end in control module；3rd diode D3 and the 4th diode D4 positive pole is grounded.
The operation principle of the PH controllers：
Fig. 1：The temperature and base for PH/ORP and the temperature collect module collection that control module gathers PH/ORP acquisition modules
Quasi-mode block is contrasted, and the code value that PH/ORP acquisition modules and temperature collect module collection come up is turned by PH electrode algorithms
Change pH value into, pH value is shown in man-machine interface；PH value is converted into 4-20mA by control module by PH/ORP pick-up output algorithms
Pick-up electric current, and teletransmission is carried out by pick-up output module；Control module by standard MODBUS protocol conversions, and leads to pH value
RS485 communication modules are crossed to be exported；Control module is by controlling the buzzer warning and police instruction module of buzzer module
Light emitting diode light on and off inform client.Running status indicating module indicates whether current operating state is normal, negative pressure conversion
Module and LDO Voltage stabilizing modules provide operating voltage for whole system.
PH electrode algorithms：Known two groups different PH solution, PH/ORP acquisition modules are connected to by PH/ORP electrodes, record
Two groups of magnitudes of voltage of actual PH/ORP electrodes collection, by actual calibration formula (1), calculate K1, B1 value of Current Temperatures, then
The K2 values under Current Temperatures are calculated by theoretical slope formula (2), finally by actual Theoretical Percent formula (3) in difference
At a temperature of identical principle, calculate the K values at other temperature.
(1) actual calibration formula：U=B-K1*PH, wherein, K1 is the actual slope of linear equation, and B1 is linear equation
Actual values of intercept, magnitude of voltage U and PH are variable.
(2) theoretical slope formula：Theoretical slope value K2=2.303RT/F, wherein, gas constant R=8.314 (unit J/
Mol*K), T is current Fahrenheit temperature, Faraday constant F=96485.3383C/mol；Theoretical values of intercept B2 is -414.12mV.
(3) actual Theoretical Percent formula：(N represents wiring board error constant to N=K1/K2, and N will not be changed by temperature
And change, K1 is that actual slope, K2 are theoretical slope)
PH pick-up output algorithms：Output current is defined as by pick-up output module：Correspondence 4mA when pH value is 0, pH value is 14
When correspondence 20mA, electric current output calculation formula：I=(pH value -4mA correspondences pH value) * (20mA -4mA)/(20mA correspondences pH value -
4mA correspondences pH value)+4.00, i.e. I=(pH value -0) * (16/14)+4.00.ORP pick-up output algorithms：Pick-up output module will be defeated
Going out current definition is：- 1500 be 4mA respective values；+ 1500 be 20mA respective values, electric current output calculation formula：(D-4mA couples of I=
Should be worth) * (20mA -4mA)/(20mA respective value -4mA respective values)+4.00, I=(D+1500) * (16/3000)+4.00.
Fig. 3：Temperature acquisition principle：A 2.5V normal voltage, which is produced, by base modules is connected to temperature sensor NTC electricity
One end is hindered, the other end of temperature sensor NTC resistance connects the 6th resistance R6 to DGND, gathers the 6th resistance R6 to DGND electricity
Pressure, so that resistance signal is converted into voltage signal, then is amplified by the first operational amplifier U4, obtains 0-2V voltage, and
Export to AD inside main control chip.
Fig. 4：PH/ORP electrode acquisition principles：Electrode output be -414mV~+414mV weak voltage signal, by with
Increase output impedance with device U8, then negative pressure is transformed into by malleation by R10, R11, R14, R37, R15 precision resistance, finally by
Second operational amplifier U7 is amplified, and obtains 0-2V voltage signal, and is exported to AD inside main control chip.
Figure 11：RS485 communication module principles：First pass through the first isolation optocoupler U12, second isolation optocoupler U15 and photoelectricity every
The 3.3V level signals of UART interface are converted into 5V level signals from device U16.Communicating circuit is driven by UART interface and RS485
Circuit is constituted, and UART interface is responsible for handling the data for receiving and sending, and RS485 drive circuits are responsible for what UART was sent
Signal is converted to the level of RS485 electrical characteristic, the signal received from RS485 standard handovers be 0~5V criterion numeral
Word signal.It is made up of inside 485 communication chip U14 a receiver and a transmitter, receiver is received and passed by RS485 buses
Defeated level signal, RX485B is receiver input, is converted into level signal by RS485 communication chips, then pass through second
Isolation optocoupler U15 connects the RX pins of main control chip；Main control chip U5 TX pins transfer data to the first isolation optocoupler U12,
Level signal is converted into by differential signal by RS485 communication chips again and is transmitted to transmitter, final data is sent out by RS485A ends
It is sent in bus, RX485A is transmitter output end；The RX485 pins of main control chip are the Enable Pins of receiver and transmitter.
Because 485 communication chip U14 are half-duplex work, thereforeDE can be controlled by one I/O mouthfuls of main control chip.
Figure 12：Pick-up output module principle：Main control chip timing produces a PWM waveform, passes through the first PNP triode Q3
Carry out Current amplifier driving the 3rd and isolate optocoupler U9, and export amplitude 3.3V PWM frequency signal.Second fiducial chip
U13 produce a 2.5V reference voltage powered to logical AND gate U11, by amplitude 3.3V PWM frequency signal by one with
Door is transformed into amplitude 2.5V PWM frequency signal, and finally by 2 road RC filter circuits, amplitude 2.5V PWM frequency is believed
Number it is converted into 0-2.5V voltage signals.0-2.5V voltage signals are converted into 0-24mA current signal by V/A translation circuits.
Claims (3)
1.PH controllers, including control module, PH/ORP acquisition modules, temperature collect module, man-machine interface, running status are indicated
Module, base modules, LDO Voltage stabilizing modules, police instruction module, buzzer module, RS485 communication modules, pick-up output module,
Negative pressure conversion module, master control system filtration module and alarm relay module, it is characterised in that：Described control module control report
The light emitting diode light on and off of alert indicating module；Man-machine interface is connected with control module；
Described control module includes main control chip U5, the 8th resistance R8 and the 9th resistance R9；Main control chip U5 model
STM8L052R8；Main control chip U5 6 pins connect the 9th resistance R9 one end, and 7 pins connect the 8th resistance R8 one end, 13 pins
Master control system filtration module is connect, 11 pins, 55 pins, 29 pins and 12 pins connect+3.3V supply voltages, and 10 pins, 56 are drawn
Pin, 30 pins and 9 pins meet DGND；
Described temperature collect module include the first operational amplifier U4, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6,
4th electric capacity C4, the 12nd electric capacity C12, the 13rd electric capacity C13, the 30th electric capacity C30 and the 31st electric capacity C31；Master control core
Piece U5 48 pins connect the 4th resistance R4 one end and the 12nd electric capacity C12 one end；12nd electric capacity C12 another termination
DGND；4th resistance R4 the first operational amplifier of another termination U4 output end and inverting input；First operational amplifier
U4 normal phase input end connects the 5th resistance R5 one end, the 13rd electric capacity C13 of positive supply input termination one end and negative pressure conversion
+ 5V the supply voltages of module output, the 4th electric capacity C4 of negative supply input termination one end and the -5V of negative pressure conversion module output are supplied
Piezoelectric voltage；13rd electric capacity C13 and the 4th electric capacity C4 other end meets DGND；The 5th resistance R5 resistance of another termination the 6th
R6 one end, the 31st electric capacity C31 one end, one end of the 30th electric capacity C30 one end and temperature sensor NTC resistance；
+ 2.5V the reference voltages of another termination base modules output of temperature sensor NTC resistance；6th resistance R6, the 31st electricity
The other end for holding C31 and the 30th electric capacity C30 meets DGND；
Described PH/ORP acquisition modules include the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd electricity
Hinder R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 37th resistance R17, the 37th resistance
R37, the 14th electric capacity C14, the 15th electric capacity C15, the 16th electric capacity C16, the 17th electric capacity C17, the 18th electric capacity C18,
19 electric capacity C19, the 20th electric capacity C20, the 21st electric capacity C21, the 32nd electric capacity C32, the second operational amplifier U7 and
Follower U8；Follower U8 model CA3140；Main control chip U5 39 pins connect the 19th electric capacity C19 one end and the tenth
Three resistance R13 one end；19th electric capacity C19 another termination DGND；The 13rd resistance R13 computing of another termination second is put
One end of big device U7 output end, the 17th resistance R17 one end and the 32nd electric capacity C32；16th resistance R16 one end
Connect the anti-phase input of the 17th resistance the R17 other end, the 32nd electric capacity C32 other end and the second operational amplifier U7
End, another termination DGND；Second operational amplifier U7 normal phase input end connects the 17th electric capacity C17, the 16th electric capacity C16,
15 resistance R15, the 14th resistance R14 and the tenth resistance R10 one end；Second operational amplifier U7 positive supply input termination
15th electric capacity C15 one end and the+5V supply voltages for connecing the output of negative pressure conversion module, negative supply input the 20th electric capacity of termination
C20 one end and the -5V supply voltages of negative pressure conversion module output；15th electric capacity C15, the 16th electric capacity C16, the 17th electricity
The other end for holding C17, the 20th electric capacity C20 and the 15th resistance R15 meets DGND；Tenth resistance R10 another termination the tenth
One resistance R11 and the 37th resistance R37 one end；+ 2.5V the bases of 11st resistance R11 another termination base modules output
Quasi- voltage；37th resistance R37 another termination DGND；14th resistance R14 another termination follower U8 output end
And inverting input；Follower U8 normal phase input end connects the 12nd resistance R12 and the 18th electric capacity C18 one end, the 12nd
The output end of resistance R12 another termination PH/ORP sensors；Follower U8 the 21st electric capacity C21 of negative supply input termination
One end and connect negative pressure conversion module output -5V supply voltages, positive supply input termination the 14th electric capacity C14 one end simultaneously connect
+ 5V the supply voltages of negative pressure conversion module output；14th electric capacity C14, the 18th electric capacity C18, the 21st electric capacity C21 it is another
One end meets DGND；
Described negative pressure conversion module includes DC-DC conversion chips U2, the 3rd electric capacity C3, the 9th electric capacity C9 and the tenth electric capacity C10；
DC-DC conversion chips U2 model ICL7660；DC-DC conversion chips U2 8 pins connect the 3rd electric capacity C3 one end and output
+ 5V supply voltages, 5 pins connect the tenth electric capacity C10 one end and output -5V supply voltages, and 2 pins meet the one of the 9th electric capacity C9
End, 4 pins connect the 9th electric capacity C9 other end；DC-DC converts chip U2 3 pins, the 3rd electric capacity C3 and the tenth electric capacity C10
The other end meets DGND；DC-DC conversion chips U2 1,6 and 7 pins are hanging；
Described base modules include 3rd resistor R3 and the first fiducial chip U3；First fiducial chip U3 model TL431；
The positive pole of voltage-stabiliser tube meets DGND in first fiducial chip U3, and negative pole connects 3rd resistor R3 one end and output+2.5V reference voltages；
3rd resistor R3 another termination+3.3V supply voltages；
Described LDO Voltage stabilizing modules include LDO linear voltage stabilization chips U1, the 5th electric capacity C5 and the 6th electric capacity C6；LDO linear voltage stabilizations
Chip U1 model LM7824；LDO linear voltage stabilization chips U1 3 pins connect the 6th electric capacity C6 one end and output+5V powers
Voltage, 1 pin connects the 5th electric capacity C5 one end and connects+24V supply voltages, and 4 pins connect the 6th electric capacity C6's and the 5th electric capacity C5
The other end simultaneously meets AGND；
Described master control system filtration module includes the first electric capacity C1, the second electric capacity C2, the 7th electric capacity C7, the 8th electric capacity C8 and the
11 electric capacity C11；First electric capacity C1, the second electric capacity C2, the 7th electric capacity C7 and the 8th electric capacity C8 one end meet+3.3V and powered electricity
Pressure, the other end connects the 11st electric capacity C11 one end and meets DGND；11st electric capacity C11 another termination base modules output
+ 2.5V reference voltages and connect main control chip U5 13 pins；
Described buzzer module includes the first triode Q1, first resistor R1, second resistance R2, the first diode D1 and buzzing
Device Sp1；A second resistance R2 termination main control chip U5 4 pins, another termination first resistor R1 one end and the one or three pole
Pipe Q1 base stage；+ 5V the supply voltages of first resistor R1 another termination negative pressure conversion module output；First triode Q1 hair
Emitter-base bandgap grading connects the+5V supply voltages of negative pressure conversion module output, and colelctor electrode connects the first diode D1 negative terminal and bearing for buzzer Sp1
End；First diode D1 anode and buzzer Sp1 anode meet DGND；
Described running status indicating module includes light emitting diode D2 and the 7th resistance R7；Light emitting diode D2 positive pole connects+
3.3V supply voltages, negative pole connects the 7th resistance R7 one end；7th resistance R7 another termination main control chip U5 3 pins；
Described RS485 communication modules include the first isolation optocoupler U12, the second isolation optocoupler U15,485 communication chip U14, light
Electric isolator U16, the 22nd resistance R22, the 23rd resistance R23, the 28th resistance R28, the 31st resistance R31,
32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the 35th resistance R35, the 36th resistance
R36 and the 26th electric capacity C26；First isolation optocoupler U12 and the second isolation optocoupler U15 model are 6N137；485 communications
Chip U14 model MAX485；Photoisolator U16 model ACPL-217-56BE；Draw the 2 of first isolation optocoupler U12
Pin connects the 23rd resistance R23 one end, and 3 pins connect main control chip U5 58 pins, 8 pins connect the output of LDO Voltage stabilizing modules+
5V supply voltages, 6 pins connect the 22nd resistance R22 one end, 485 communication chip U14 1 pin and meet AGND, and 5 pins connect
AGND；23rd resistance R23 another termination+3.3V supply voltages；First isolation optocoupler U12 1 pin, 4 pins and 7 draw
Pin is hanging；+ 5V the supply voltages of 22nd resistance R22 another termination LDO Voltage stabilizing modules output；Second isolation optocoupler
U15 8 pins connect the+5V supply voltages of negative pressure conversion module output, and 7 pins connect main control chip U5 57 pins, and 6 pins connect the
One end of 34 resistance R34s, 2 pins connect the 31st resistance R31 one end, and what 3 pins met 485 communication chip U14 4 draws
Pin, 5 pins meet DGND, and 1 pin and 4 pins are hanging；Another termination+3.3V supply voltages of 34th resistance R34；3rd
+ 5V the supply voltages of 11 resistance R31 another termination LDO Voltage stabilizing modules output；485 communication chip U14 2 pins and 3 draw
Pin connects the 32nd resistance R32 one end and photoisolator U16 the 4th pin, and 8 pins connect the 26th electric capacity C26's
One end, the 28th resistance R28 one end and the+5V supply voltages for connecing the output of LDO Voltage stabilizing modules, 7 pin connect external communication device
One end, the 28th resistance R28 other end and the 33rd resistance R33 one end, 6 pins connect the another of external communication device
One end, 5 pins connect the 36th resistance R36 one end and meet AGND；The 36th resistance R36 electricity of another termination the 33rd
Hinder the R33 other end；26th electric capacity C26 another termination AGND；Phototube Coupling U16 the 1st pin connects the 35th electricity
R35 one end is hindered, the 2nd pin connects main control chip U5 59 pins, and the 3rd pin meets AGND；The 35th resistance R35 other end
Connect+3.3V supply voltages；+ 5V the supply voltages of 32nd resistance R32 another termination LDO Voltage stabilizing modules output；
Described pick-up output module includes the 3rd isolation optocoupler U9, the first PNP triode Q3, the second PNP triode Q4, NPN
Triode Q2, logical AND gate U11, the second fiducial chip U13, the second operational amplifier U10A and voltage-regulator diode Z1；3rd every
Model HCPL-M453-500E, the second fiducial chip U13 model TL431ACDBZR, logical AND gate U11 from optocoupler U9
Model SN74AHC1G08DBVR, the second operational amplifier U10A model LM358DR；The 1st of 3rd isolation optocoupler U9
Pin connects the 20th resistance R20 one end, the 3rd pin connect the 22nd electric capacity C22 one end, voltage-regulator diode Z1 negative pole simultaneously
+ 24V supply voltages are connect, the 5th pin connects the first PNP triode Q3 colelctor electrode, and the 6th pin connects the one of the 21st resistance R21
End and logical AND gate U11 1 pin and 2 pins, the 4th pin are connect in the 30th resistance R30 one end, the second fiducial chip U13
3 pins of the positive pole of voltage-stabiliser tube, the 27th electric capacity C27 one end and logical AND gate U11；The 20th resistance R20 other end
Connect+3.3V supply voltages；A 25th resistance R25 first PNP triode Q3 of termination base stage, another termination the 29th
Resistance R29 one end and main control chip U5 8 pins；First PNP triode Q3 emitter stage and the 29th resistance R29's is another
One end meets DGND；22nd electric capacity C22 and the 30th resistance R30 other end meets AGND；Voltage-regulator diode Z1 is just
Pole meets the negative pole of voltage-stabiliser tube, the one of the 23rd electric capacity C23 in the 21st resistance R21 other end, the second fiducial chip U13
End, the 24th electric capacity C24 one end, the 27th electric capacity C27 other end, the 18th resistance R18 one end and logical AND
Door U11 5 pins；23rd electric capacity C23 the resistance R26 of another termination the 26th and the 27th resistance R27 one end；
26th resistance R26 another termination logical AND gate U11 4 pins；24th electric capacity C24 another termination the 27th
3 pins of the resistance R27 other end, the 28th electric capacity C28 one end and the second operational amplifier U10A；28th electric capacity
C28 the second operational amplifier of another termination U10A 2 pins, the 19th resistance R19 one end and the 25th electric capacity C25
One end；Second operational amplifier U10A 4 pins meet AGND, and 1 pin connects the 25th electric capacity C25 other end and the 24th
Resistance R24 one end, 8 pins connect the 29th electric capacity C29 one end and connect+24V supply voltages；29th electric capacity C29's
Another termination AGND；24th resistance R24 another termination NPN triode Q2 base stage；NPN triode Q2 emitter stage connects
The colelctor electrode of the 18th resistance R18 other end, the 19th resistance R19 other end and the second PNP triode Q4, colelctor electrode connects
Second PNP triode Q4 base stage；Second PNP triode Q4 emitter stage is used as pick-up output end IOut；
Described alarm relay module includes the first relay RE1, the second relay RE2, the 5th triode Q5, the six or three pole
Pipe Q6, the 3rd diode D3, the 4th diode D4, the 37th resistance R37, the 38th resistance R38, the 39th resistance
R39 and the 40th resistance R40；First relay RE1 and the second relay RE2 model are HF32F/005-HS3, the five or three
Pole pipe Q5 and the 6th triode Q6 model are BC857CLT1G；First relay RE1 the 1st pin meets DGND, the 2nd pin
The 3rd diode D3 negative pole and the 5th triode Q5 colelctor electrode are connect, the 3rd pin and the 4th pin are connect by alarm terminals CN2
External alert device；5th triode Q5 emitter stage connects the+5V supply voltages of negative pressure conversion module output, and base stage connects the 37th
Resistance R37 one end and the 38th resistance R38 one end；37th resistance R37 another termination negative pressure conversion module is defeated
The 9th resistance R9 other end in the+5V supply voltages gone out, the 38th resistance R38 another termination control module；Second after
Electrical equipment RE2 the 1st pin meets DGND, and the 2nd pin connects the 4th diode D4 negative pole and the 6th triode Q6 colelctor electrode, the 3rd
Pin and the 4th pin connect external alert device by alarm terminals CN2；It is defeated that 6th triode Q6 emitter stage connects negative pressure conversion module
+ 5V the supply voltages gone out, base stage connects the 40th resistance R40 one end and the 39th resistance R39 one end, the 40th resistance
+ 5V the supply voltages of R40 another termination negative pressure conversion module output, the 39th resistance R39 another termination control module
In the 8th resistance R8 the other end；3rd diode D3 and the 4th diode D4 positive pole is grounded.
2. PH controllers according to claim 1, it is characterised in that：The main control chip U5 1,2,5,14,15,16,
17、18、19、20、21、22、23、24、25、26、27、28、31、32、33、34、35、36、37、38、40、41、42、43、44、
45th, 46,47,49,50,51,52,53,54,60,61,62,63 and 64 pins are hanging.
3. PH controllers according to claim 1, it is characterised in that：Described pick-up output module also includes the 3rd computing
Amplifier U10B, the 3rd operational amplifier U10B model LM358DR；3rd operational amplifier U10B the 5th pin is connected to
AGND, the 6th pin is connected to the 7th pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610534540.7A CN105955333B (en) | 2016-07-05 | 2016-07-05 | PH controllers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610534540.7A CN105955333B (en) | 2016-07-05 | 2016-07-05 | PH controllers |
Publications (2)
| Publication Number | Publication Date |
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| CN116750857B (en) * | 2023-08-17 | 2023-11-17 | 秦皇岛海绵环保设备有限公司 | Intelligent sewage treatment system based on biological regulation and control |
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| CN102854388A (en) * | 2012-09-10 | 2013-01-02 | 博格隆(上海)生物技术有限公司 | System for detecting electrical conductivity and pH (potential Of Hydrogen) during biological separation and purification process |
| CN104122376A (en) * | 2014-06-30 | 2014-10-29 | 南京领先环保技术有限公司 | Multi-parameter water quality analyzer |
| CN204241983U (en) * | 2014-12-01 | 2015-04-01 | 深圳市山艺园林绿化有限公司 | A kind of pond potential of hydrogen management system of afforestation |
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| CN102854388A (en) * | 2012-09-10 | 2013-01-02 | 博格隆(上海)生物技术有限公司 | System for detecting electrical conductivity and pH (potential Of Hydrogen) during biological separation and purification process |
| CN104122376A (en) * | 2014-06-30 | 2014-10-29 | 南京领先环保技术有限公司 | Multi-parameter water quality analyzer |
| CN204241983U (en) * | 2014-12-01 | 2015-04-01 | 深圳市山艺园林绿化有限公司 | A kind of pond potential of hydrogen management system of afforestation |
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