CN107024567A - It is a kind of to simulate acid, the pH value electric signal generator circuit of alkali concn - Google Patents
It is a kind of to simulate acid, the pH value electric signal generator circuit of alkali concn Download PDFInfo
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- CN107024567A CN107024567A CN201710382657.2A CN201710382657A CN107024567A CN 107024567 A CN107024567 A CN 107024567A CN 201710382657 A CN201710382657 A CN 201710382657A CN 107024567 A CN107024567 A CN 107024567A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a kind of pH value electric signal generator circuit for simulating acid, alkali concn, it includes：The power circuit of positive voltage, the first pH value generation circuit, the power circuit of negative voltage, the second pH value generation circuit and electric signal output control circuit；Wherein, the input of first pH value generation circuit is connected to the power circuit of positive voltage, first pH value generation circuit produces pH value [0,7] the first electric signal in the range of passes through electric signal output control circuit output, the input of second pH value generation circuit is connected to the power circuit of negative voltage, second pH value generation circuit produces second electric signal of the pH value in the range of [7,14] and passes through electric signal output control circuit output.The present invention produces the corresponding voltage output of any pH value by adjusting corresponding pH value generation circuit, the degree of accuracy for the pH value for verifying detection commissioning device to replace pH test paper with acid, alkali normal fluid and pH glass moulds sensor.
Description
Technical field
The present invention relates to a kind of precision instrument signal source, the accurate of pH value is verified especially with pH value electric signal generator
That spends simulates acid, the pH value electric signal generator circuit of alkali concn.
Background technology
At present, substantial amounts of Water-quality treater, electroplating device and acid, the detection device and instrument of aqueous slkali are being produced
When, all it is the pH test paper and expensive glass mould sensor and mark using standard when verifying the degree of accuracy of detection pH value
Acid, the alkali lye body of standard, especially careful when when in use with keeping, pH test paper can not be contaminated with acid, alkali normal fluid, glass
Type sensor is easily broken in use, while when some equipment are produced, it is necessary to detect such as pH4 and pH7 value, operator
Member will use the pH liquid of two kinds of standards of sensor test of same model, interact test, so easily cause very big
Error, operation item is very cumbersome, and this brings very big difficulty to production with detection work, therefore, applicant designs a kind of pH electricity
Signal generator circuit, can substitute the function of pH test paper and acid, alkali normal fluid and pH glass mould sensors.
The content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of pH value for simulating acid, alkali concn
Electric signal generator circuit, it produces the corresponding voltage output of any pH value by adjusting corresponding pH value generation circuit, to take
For pH test paper the degree of accuracy for the pH value for detecting commissioning device is verified with acid, alkali normal fluid and pH glass moulds sensor.
To achieve these goals, the present invention uses following technical scheme：
A kind of pH value electric signal generator circuit, it includes：The power circuit of positive voltage, the first pH value generation circuit, negative voltage
Power circuit, the second pH value generation circuit and electric signal output control circuit；
Wherein, the input of the first pH value generation circuit is connected to the power circuit of positive voltage, the first pH value generation circuit
Produce pH value corresponding first electric signal in the range of [0,7] and pass through electric signal output control circuit output, second pH value
The input of generation circuit is connected to the power circuit of negative voltage, and the second pH value generation circuit produces pH value in the range of [7,14]
Corresponding second electric signal passes through electric signal output control circuit output.
Further, the power circuit of the positive voltage includes dc source, and the first pH value generation circuit includes electricity
R1, resistance R3 and slide rheostat W2 are hindered, the power circuit of the negative voltage includes negative electricity source generator, the second pH value production
Raw circuit includes resistance R2, resistance R4 and slide rheostat W3；
Wherein：The output end of the dc source pass sequentially through resistance R1 and resistance R3 be connected to slide rheostat W2 first consolidate
Fixed end, slide rheostat W2 the second fixing end ground connection, the sliding end of the slide rheostat W2 is connected to resistance R3 and slip
Between rheostat W2 the first fixing end；The power end of the negative electricity source generator is connected to the output end of dc source, described
The output end of negative electricity source generator passes sequentially through the first fixing end that resistance R2 and resistance R4 is connected to slide rheostat W3, slides
Rheostat W3 the second fixing end ground connection, the sliding end of the slide rheostat W3 is connected to resistance R4's and slide rheostat W3
Between first fixing end；
The sliding end of the slide rheostat W2 and slide rheostat W3 sliding end are connected to electric signal output control circuit
Input.
Further, the pH value electric signal generator circuit further comprises the first mu balanced circuit and the second voltage stabilizing electricity
Road, first mu balanced circuit includes the first voltage-stablizer and the first filter circuit；Second mu balanced circuit includes the second voltage stabilizing
Device and the second filter circuit, first voltage-stablizer and the second voltage-stablizer are source of stable pressure TL431, the sun of first voltage-stablizer
The negative electrode of pole and the second voltage-stablizer is grounded, and the negative electrode of first voltage-stablizer is connected between resistance R1 and resistance R3, described
The anode of second voltage-stablizer is connected between resistance R2 and resistance R4, and the reference pole of first voltage-stablizer is connected to the first voltage stabilizing
The negative electrode of device, the reference pole of the second voltage-stablizer is connected to the negative electrode of the second voltage-stablizer, first filter circuit and the second filtering
Circuit be respectively electric capacity C6 and electric capacity C7, the electric capacity C6 and electric capacity C7 one end be respectively connecting to the first voltage-stablizer negative electrode and
The anode of second voltage-stablizer, the other end of the electric capacity C6 and electric capacity C7 is grounded.
Further, the electric signal output control circuit includes slide rheostat W1, bleeder circuit, the bleeder circuit
Including resistance R5 and resistance R7, two fixing ends of the slide rheostat W1 are respectively connecting to slide rheostat W2 sliding end
With slide rheostat W3 sliding end, the sliding end of the slide rheostat W1 passes sequentially through resistance R5 and lead-out terminal output the
Three electric signals；One end of the resistance R7 is connected between resistance R5 and lead-out terminal, resistance R7 other end ground connection.
Further, the electric signal output control circuit further comprises one the 3rd filter circuit, the 3rd filtering
Circuit includes resistance R6 and electric capacity C10, and described resistance R6 one end is connected between resistance R5 and resistance R7, and the resistance R6's is another
One end is connected to lead-out terminal, and one end ground connection of the electric capacity C10, the electric capacity C10 other end is connected to resistance R6 and output end
Between son.
Further, the power circuit of the positive voltage further comprises one the 4th filter circuit and switchs S1, described negative
The power circuit of voltage further comprises one the 5th filter circuit, and the 4th filter circuit includes electrochemical capacitor CE1 and electric capacity
C6, the 5th filter circuit includes electrochemical capacitor C3, electric capacity C4 and electric capacity C5, the positive pole and electric capacity of the electrochemical capacitor CE1
C6 one end is connected between the output end of dc source and resistance R1, the negative pole of the electrochemical capacitor CE1 and electric capacity C6's
The other end is grounded, and the switch S1 is connected between the output end of dc source and electrochemical capacitor CE1 positive pole, the electrolysis
One end of electric capacity C3 positive pole, electric capacity C4 one end and electric capacity C5 be connected to negative electricity source generator output end and resistance R2 it
Between, the other end of the negative pole of the electrochemical capacitor C3, the electric capacity C4 other end and electric capacity C5 is grounded, the output end of dc source
The power end of negative electricity source generator is connected to by switching S1.
Further, the power circuit of the positive voltage includes dc source, and the first pH value generation circuit includes electricity
R1, resistance R3 and slide rheostat W2 are hindered, the power circuit of the negative voltage includes negative electricity source generator, the second pH value production
Raw circuit includes resistance R2, resistance R4, resistance R5 and slide rheostat W3；
Wherein：The output end of the dc source pass sequentially through resistance R1 and resistance R3 be connected to slide rheostat W2 first consolidate
Fixed end, slide rheostat W2 the second fixing end ground connection；The power end of the negative electricity source generator is connected to the defeated of dc source
Go out end, the output end of the negative electricity source generator, which passes sequentially through resistance R2 and resistance R4 and is connected to the first of slide rheostat W3, to be consolidated
Fixed end, slide rheostat W3 the second fixing end is connected between resistance R1 and resistance R3 by resistance R5；
The sliding end of the slide rheostat W2 and slide rheostat W3 sliding end are connected to electric signal output control circuit
Input.
Further, the pH value electric signal generator circuit further comprises the first mu balanced circuit and the second voltage stabilizing electricity
Road, first mu balanced circuit includes the first voltage-stablizer and the first filter circuit；Second mu balanced circuit includes the second voltage stabilizing
Device and the second filter circuit, first voltage-stablizer and the second voltage-stablizer are source of stable pressure TL431, the sun of first voltage-stablizer
The negative electrode of pole and the second voltage-stablizer is grounded, and the negative electrode of first voltage-stablizer is connected between resistance R1 and resistance R3, described
The anode of second voltage-stablizer is connected between resistance R2 and resistance R4, and the reference pole of first voltage-stablizer is connected to the first voltage stabilizing
The negative electrode of device, the reference pole of the second voltage-stablizer is connected to the negative electrode of the second voltage-stablizer, first filter circuit and the second filtering
Circuit be respectively electric capacity C6 and electric capacity C7, the electric capacity C6 and electric capacity C7 one end be respectively connecting to the first voltage-stablizer negative electrode and
The anode of second voltage-stablizer, the other end of the electric capacity C6 and electric capacity C7 is grounded.
Further, the electric signal output control circuit includes single-pole double-throw switch (SPDT) S2 and the 3rd filter circuit, described
3rd filter circuit includes resistance R6 and electric capacity C10, and two stationary contacts of the single-pole double-throw switch (SPDT) S2 are respectively connecting to slide
Rheostat W2 sliding end and slide rheostat W3 sliding end, the movable contact of the single-pole double-throw switch (SPDT) S2 pass sequentially through resistance
R6 and lead-out terminal export the 3rd electric signal, and one end ground connection of the electric capacity C10, the electric capacity C10 other end is connected to resistance R6
Between lead-out terminal.
Further, the power circuit of the positive voltage further comprises one the 4th filter circuit and switchs S1, described negative
The power circuit of voltage further comprises one the 5th filter circuit, and the 4th filter circuit includes electrochemical capacitor CE1 and electric capacity
C6, the 5th filter circuit includes electrochemical capacitor C3, electric capacity C4 and electric capacity C5, the positive pole and electric capacity of the electrochemical capacitor CE1
C6 one end is connected between the output end of dc source and resistance R1, the negative pole of the electrochemical capacitor CE1 and electric capacity C6's
The other end is grounded, and the switch S1 is connected between the output end of dc source and electrochemical capacitor CE1 positive pole, the electrolysis
One end of electric capacity C3 positive pole, electric capacity C4 one end and electric capacity C5 be connected to negative electricity source generator output end and resistance R2 it
Between, the other end of the negative pole of the electrochemical capacitor C3, the electric capacity C4 other end and electric capacity C5 is grounded, the output end of dc source
The power end of negative electricity source generator is connected to by switching S1.
Compared with prior art, the beneficial effects of the present invention are：
It dexterously utilizes power circuit, the power circuit of negative voltage and the pH value generation circuit of positive voltage（By slip variable resistance
Device is realized）Voltage signal corresponding with pH value is produced, therefore, the accuracy verification of calibration equipment or instrument detection pH value is being treated
When, only need this pH value electric signal generator circuit to produce the voltage signal corresponding with pH value to be verified and be output to and corresponding treat school
Test equipment or instrument.
Brief description of the drawings
Fig. 1 is former for a kind of circuit for simulating sour, the pH value electric signal generator circuit embodiments one of alkali concn of the present invention
Reason figure；
Fig. 2 simulates acid, the circuit theory diagrams of the pH value electric signal generator circuit embodiments two of alkali concn for the present invention is a kind of.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
Embodiment one
A kind of to simulate acid, the pH value electric signal generator circuit of alkali concn, it includes：The power circuit of positive voltage, the first pH
It is worth generation circuit, the power circuit of negative voltage, the second pH value generation circuit and electric signal output control circuit；
Wherein, the input of the first pH value generation circuit is connected to the power circuit of positive voltage, and the first pH value generation circuit is produced
First electric signal of the pH value in the range of [0,7] by electric signal output control circuit output, the second pH value generation circuit it is defeated
Enter the power circuit that end is connected to negative voltage, the second pH value generation circuit produces second electric signal of the pH value in the range of [7,14]
Pass through electric signal output control circuit output.
Specifically, it refer to shown in Fig. 1, the power circuit of positive voltage includes dc source, the 4th filter circuit and switch
S1, the first pH value generation circuit includes resistance R1, resistance R3 and slide rheostat W2, and the power circuit of negative voltage includes negative supply
Generator and, the second pH value generation circuit include resistance R2, resistance R4 and slide rheostat W3, the 4th filter circuit include electrolysis
Electric capacity CE1 and electric capacity C6, the 5th filter circuit includes electrochemical capacitor C3, electric capacity C4 and electric capacity C5；
Wherein：The output end of dc source passes sequentially through that switch S1, resistance R1 and resistance R3 are connected to slide rheostat W2
One fixing end, slide rheostat W2 the second fixing end ground connection, slide rheostat W2 sliding end is connected to resistance R3 and slip
Between rheostat W2 the first fixing end；Electrochemical capacitor CE1 positive pole and electric capacity C6 one end are connected to switch S1 and resistance
Between R1, electrochemical capacitor CE1 negative pole and the electric capacity C6 other end are grounded；The output end of dc source is by switching S1 connections
To the power end of negative electricity source generator, the output end of negative electricity source generator passes sequentially through resistance R2 and resistance R4 and is connected to slip change
Device W3 the first fixing end is hindered, slide rheostat W3 the second fixing end ground connection, slide rheostat W3 sliding end is connected to electricity
Between the first fixing end for hindering R4 and slide rheostat W3；The one of electrochemical capacitor C3 positive pole, electric capacity C4 one end and electric capacity C5
End is connected between the output end of negative electricity source generator and resistance R2, electrochemical capacitor C3 negative pole, the electric capacity C4 other end and
The electric capacity C5 other end is grounded；Slide rheostat W2 sliding end and slide rheostat W3 sliding end are connected to electric signal
The input of output control circuit.
PH value electric signal generator circuit further comprises the first mu balanced circuit and the second mu balanced circuit, the first mu balanced circuit
Including the first voltage-stablizer and the first filter circuit；Second mu balanced circuit includes the second voltage-stablizer and the second filter circuit, and first is steady
Depressor and the second voltage-stablizer are source of stable pressure TL431, and the negative electrode of the anode of the first voltage-stablizer and the second voltage-stablizer is grounded, and first
The negative electrode of voltage-stablizer is connected between resistance R1 and resistance R3, the anode of the second voltage-stablizer be connected to resistance R2 and resistance R4 it
Between, the reference pole of the first voltage-stablizer is connected to the negative electrode of the first voltage-stablizer, and the reference pole of the second voltage-stablizer is connected to the second voltage stabilizing
The negative electrode of device, the first filter circuit and the second filter circuit are respectively electric capacity C6 and electric capacity C7, electric capacity C6 and electric capacity C7 one end
It is respectively connecting to the negative electrode of the first voltage-stablizer and the anode of the second voltage-stablizer, electric capacity C6 and electric capacity the C7 other end are grounded.
Electric signal output control circuit includes slide rheostat W1, bleeder circuit and the 3rd filter circuit, bleeder circuit bag
Resistance R5 and resistance R7 are included, slide rheostat W1 two fixing ends are respectively connecting to slide rheostat W2 sliding end and slip
Rheostat W3 sliding end, slide rheostat W1 sliding end passes sequentially through resistance R5 and lead-out terminal exports the 3rd electric signal；
Resistance R7 one end is connected between resistance R5 and lead-out terminal, resistance R7 other end ground connection；3rd filter circuit includes electricity
R6 and electric capacity C10 is hindered, resistance R6 one end is connected between resistance R5 and resistance R7, and the resistance R6 other end is connected to output end
Son, electric capacity C10 one end ground connection, the electric capacity C10 other end is connected between resistance R6 and lead-out terminal J2.
Its operation principle is：After closure switch S1, input terminal is connected to the 4th filter circuit with external dc source
Output+5V voltages, then by resistance R1 and the first voltage-stablizer（Controllable source of stable pressure IC15）Output+2.5V voltages, slide variable resistance afterwards
Device W2 can produce first electric signal of the pH value in the range of [0,7], i.e. the first electric signal and pH value are right in the range of [0,7]
Should, any first electric signal has corresponding pH value in the range of [0,7]；Similarly, negative-voltage generator passes through the 5th wave filter
Output -5V voltages, then by resistance R2 and the second voltage-stablizer（Controllable source of stable pressure IC16）Output -2.5V voltages, slide variable resistance afterwards
Device W3 can produce second electric signal of the pH value in the range of [7,14]（Second electric signal can exist more with the first electric signal
Crossover values, certainly, in order to distinguish, can also by the second electric signal do not include forward terminal 7 value）, i.e. the second electric signal with
PH value correspondence in the range of [7,14], any second electric signal has corresponding pH value in the range of [7,14], finally again by W1 pairs
Corresponding electric signal is adjusted, and the 3rd telecommunications needed is exported by lead-out terminal J2 by bleeder circuit, the 3rd filter circuit
Number, the 3rd electric signal output gives equipment to be verified or instrument, and slide rheostat W2 and slide rheostat W3 here can recognize
To be the coarse adjustment of pH value, and slide rheostat W1 is fine tuning；The acquisition of the corresponding pH value of 3rd electric signal output can be passed through
Oscillograph（Or voltmeter）Measurement, then obtained or directly in slip change by compareing the graph of a relation of electric signal and pH value
Resistance device sets corresponding scale on W1 ~ 3, by the way that slide rheostat W1 ~ 3 are adjusted on corresponding scale to obtain corresponding pH value
3rd electric signal is loaded on equipment to be verified or instrument, certainly, when this mode preferable ph is integer.
Embodiment two
Embodiment one is different from, the generation of pH value is divided into two parts by embodiment two：A part is [0,7], another part be [7,
14], there can also be more intersections between certain two parts, two parts are isolated by a single-pole double-throw switch (SPDT) S2.
It refer to shown in Fig. 2, the power circuit of positive voltage includes dc source, the 4th filter circuit and switchs S1, first
PH value generation circuit includes resistance R1, resistance R3 and slide rheostat W2, and the power circuit of negative voltage includes negative electricity source generator
Include resistance R2, resistance R4, resistance R5 and slide rheostat W3 with, the second pH value generation circuit, the 4th filter circuit includes electricity
Electric capacity CE1 and electric capacity C6 is solved, the 5th filter circuit includes electrochemical capacitor C3, electric capacity C4 and electric capacity C5；
Wherein：The output end of dc source passes sequentially through that switch S1, resistance R1 and resistance R3 are connected to slide rheostat W2
One fixing end, slide rheostat W2 the second fixing end ground connection；Electrochemical capacitor CE1 positive pole and electric capacity C6 one end are connected to
Switch between S1 and resistance R1, electrochemical capacitor CE1 negative pole and the electric capacity C6 other end are grounded；The output end of dc source is led to
The power end that switch S1 is connected to negative electricity source generator is crossed, the output end of negative electricity source generator passes sequentially through resistance R2 and resistance R4
Slide rheostat W3 the first fixing end is connected to, slide rheostat W3 the second fixing end after resistance R5 by being connected to resistance
Between R1 and resistance R3；One end of electrochemical capacitor C3 positive pole, electric capacity C4 one end and electric capacity C5 is connected to negative supply
Between the output end and resistance R2 of device, the other end of electrochemical capacitor C3 negative pole, the electric capacity C4 other end and electric capacity C5 is grounded；
Slide rheostat W2 sliding end and slide rheostat W3 sliding end are connected to the input that electric signal output controls circuit.
PH value electric signal generator circuit further comprises the first mu balanced circuit and the second mu balanced circuit, the first mu balanced circuit
Including the first voltage-stablizer and the first filter circuit；Second mu balanced circuit includes the second voltage-stablizer and the second filter circuit, and first is steady
Depressor and the second voltage-stablizer are source of stable pressure TL431, and the negative electrode of the anode of the first voltage-stablizer and the second voltage-stablizer is grounded, and first
The negative electrode of voltage-stablizer is connected between resistance R1 and resistance R3, the anode of the second voltage-stablizer be connected to resistance R2 and resistance R4 it
Between, the reference pole of the first voltage-stablizer is connected to the negative electrode of the first voltage-stablizer, and the reference pole of the second voltage-stablizer is connected to the second voltage stabilizing
The negative electrode of device, the first filter circuit and the second filter circuit are respectively electric capacity C6 and electric capacity C7, electric capacity C6 and electric capacity C7 one end
It is respectively connecting to the negative electrode of the first voltage-stablizer and the anode of the second voltage-stablizer, electric capacity C6 and electric capacity the C7 other end are grounded.
Electric signal output control circuit includes single-pole double-throw switch (SPDT) S2 and the 3rd filter circuit, and the 3rd filter circuit includes electricity
R6 and electric capacity C10 is hindered, single-pole double-throw switch (SPDT) S2 two stationary contacts are respectively connecting to slide rheostat W2 sliding end and slip
Rheostat W3 sliding end, single-pole double-throw switch (SPDT) S2 movable contact passes sequentially through resistance R6 and lead-out terminal exports the 3rd telecommunications
Number, electric capacity C10 one end ground connection, the electric capacity C10 other end is connected between resistance R6 and lead-out terminal.
Its operation principle is roughly the same with embodiment one, and difference is when electric signal output control circuit passes through single-pole double throw
When switch is connected to slide rheostat W2 sliding end, corresponding 3rd telecommunications in the range of lead-out terminal J2 output pH value [0,7]
Number；And when single-pole double-throw switch (SPDT) is connected to slide rheostat W3 sliding end, lead-out terminal J2 output pH value [7,14] scopes
Interior corresponding 3rd electric signal.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (10)
1. a kind of simulate acid, the pH value electric signal generator circuit of alkali concn, it is characterised in that it includes：The electricity of positive voltage
Source circuit, the first pH value generation circuit, the power circuit of negative voltage, the second pH value generation circuit and electric signal output control electricity
Road；
Wherein, the input of the first pH value generation circuit is connected to the power circuit of positive voltage, the first pH value generation circuit
Produce pH value corresponding first electric signal in the range of [0,7] and pass through electric signal output control circuit output, second pH value
The input of generation circuit is connected to the power circuit of negative voltage, and the second pH value generation circuit produces pH value in the range of [7,14]
Corresponding second electric signal passes through electric signal output control circuit output.
2. pH value electric signal generator circuit as claimed in claim 1, it is characterised in that the power circuit bag of the positive voltage
Dc source is included, the first pH value generation circuit includes resistance R1, resistance R3 and slide rheostat W2, the electricity of the negative voltage
Source circuit includes negative electricity source generator, and the second pH value generation circuit includes resistance R2, resistance R4 and slide rheostat W3；
Wherein：The output end of the dc source pass sequentially through resistance R1 and resistance R3 be connected to slide rheostat W2 first consolidate
Fixed end, slide rheostat W2 the second fixing end ground connection, the sliding end of the slide rheostat W2 is connected to resistance R3 and slip
Between rheostat W2 the first fixing end；The power end of the negative electricity source generator is connected to the output end of dc source, described
The output end of negative electricity source generator passes sequentially through the first fixing end that resistance R2 and resistance R4 is connected to slide rheostat W3, slides
Rheostat W3 the second fixing end ground connection, the sliding end of the slide rheostat W3 is connected to resistance R4's and slide rheostat W3
Between first fixing end；
The sliding end of the slide rheostat W2 and slide rheostat W3 sliding end are connected to electric signal output control circuit
Input.
3. pH value electric signal generator circuit as claimed in claim 2, it is characterised in that the pH value electric signal generator electricity
Road further comprises the first mu balanced circuit and the second mu balanced circuit, and first mu balanced circuit includes the first voltage-stablizer and the first filter
Wave circuit；Second mu balanced circuit includes the second voltage-stablizer and the second filter circuit, first voltage-stablizer and the second voltage stabilizing
Device is source of stable pressure TL431, and the anode of first voltage-stablizer and the negative electrode of the second voltage-stablizer are grounded, first voltage-stablizer
Negative electrode be connected between resistance R1 and resistance R3, the anode of second voltage-stablizer is connected between resistance R2 and resistance R4,
The reference pole of first voltage-stablizer is connected to the negative electrode of the first voltage-stablizer, and the reference pole of the second voltage-stablizer is connected to the second voltage stabilizing
The negative electrode of device, first filter circuit and the second filter circuit are respectively electric capacity C6 and electric capacity C7, the electric capacity C6 and electric capacity
C7 one end is respectively connecting to the negative electrode of the first voltage-stablizer and the anode of the second voltage-stablizer, and the electric capacity C6's and electric capacity C7 is another
End is grounded.
4. pH value electric signal generator circuit as claimed in claim 2 or claim 3, it is characterised in that the electric signal output control
Circuit includes slide rheostat W1, bleeder circuit, and the bleeder circuit includes resistance R5 and resistance R7, the slide rheostat W1
Two fixing ends be respectively connecting to slide rheostat W2 sliding end and slide rheostat W3 sliding end, the slip variable resistance
Device W1 sliding end passes sequentially through resistance R5 and lead-out terminal exports the 3rd electric signal；One end of the resistance R7 is connected to resistance
Between R5 and lead-out terminal, resistance R7 other end ground connection.
5. pH value electric signal generator circuit as claimed in claim 4, it is characterised in that the electric signal output controls circuit
Further comprise one the 3rd filter circuit, the 3rd filter circuit includes resistance R6 and electric capacity C10, and described resistance R6 one end connects
It is connected between resistance R5 and resistance R7, the other end of the resistance R6 is connected to lead-out terminal, a termination of the electric capacity C10
Ground, the electric capacity C10 other end is connected between resistance R6 and lead-out terminal.
6. pH value electric signal generator circuit as claimed in claim 2, it is characterised in that the power circuit of the positive voltage enters
One step includes one the 4th filter circuit and switch S1, and the power circuit of the negative voltage further comprises one the 5th filter circuit,
4th filter circuit includes electrochemical capacitor CE1 and electric capacity C6, and the 5th filter circuit includes electrochemical capacitor C3, electric capacity C4
With electric capacity C5, the positive pole of the electrochemical capacitor CE1 and electric capacity C6 one end are connected to the output end and resistance R1 of dc source
Between, the negative pole of the electrochemical capacitor CE1 and the electric capacity C6 other end are grounded, and the switch S1 is connected to the defeated of dc source
Go out between end and electrochemical capacitor CE1 positive pole, one end of the positive pole of the electrochemical capacitor C3, electric capacity C4 one end and electric capacity C5 is equal
Be connected between the output end of negative electricity source generator and resistance R2, the negative pole of the electrochemical capacitor C3, the electric capacity C4 other end and
The electric capacity C5 other end is grounded, and the output end of dc source is connected to the power end of negative electricity source generator by switching S1.
7. pH value electric signal generator circuit as claimed in claim 1, it is characterised in that the power circuit bag of the positive voltage
Dc source is included, the first pH value generation circuit includes resistance R1, resistance R3 and slide rheostat W2, the electricity of the negative voltage
Source circuit includes negative electricity source generator, and the second pH value generation circuit includes resistance R2, resistance R4, resistance R5 and slides variable resistance
Device W3；
Wherein：The output end of the dc source pass sequentially through resistance R1 and resistance R3 be connected to slide rheostat W2 first consolidate
Fixed end, slide rheostat W2 the second fixing end ground connection；The power end of the negative electricity source generator is connected to the defeated of dc source
Go out end, the output end of the negative electricity source generator, which passes sequentially through resistance R2 and resistance R4 and is connected to the first of slide rheostat W3, to be consolidated
Fixed end, slide rheostat W3 the second fixing end is connected between resistance R1 and resistance R3 by resistance R5；
The sliding end of the slide rheostat W2 and slide rheostat W3 sliding end are connected to electric signal output control circuit
Input.
8. pH value electric signal generator circuit as claimed in claim 7, it is characterised in that the pH value electric signal generator electricity
Road further comprises the first mu balanced circuit and the second mu balanced circuit, and first mu balanced circuit includes the first voltage-stablizer and the first filter
Wave circuit；Second mu balanced circuit includes the second voltage-stablizer and the second filter circuit, first voltage-stablizer and the second voltage stabilizing
Device is source of stable pressure TL431, and the anode of first voltage-stablizer and the negative electrode of the second voltage-stablizer are grounded, first voltage-stablizer
Negative electrode be connected between resistance R1 and resistance R3, the anode of second voltage-stablizer is connected between resistance R2 and resistance R4,
The reference pole of first voltage-stablizer is connected to the negative electrode of the first voltage-stablizer, and the reference pole of the second voltage-stablizer is connected to the second voltage stabilizing
The negative electrode of device, first filter circuit and the second filter circuit are respectively electric capacity C6 and electric capacity C7, the electric capacity C6 and electric capacity
C7 one end is respectively connecting to the negative electrode of the first voltage-stablizer and the anode of the second voltage-stablizer, and the electric capacity C6's and electric capacity C7 is another
End is grounded.
9. pH value electric signal generator circuit as claimed in claim 7 or 8, it is characterised in that the electric signal output control
Circuit includes single-pole double-throw switch (SPDT) S2 and the 3rd filter circuit, and the 3rd filter circuit includes resistance R6 and electric capacity C10, described
Single-pole double-throw switch (SPDT) S2 two stationary contacts are respectively connecting to the slip of slide rheostat W2 sliding end and slide rheostat W3
End, the movable contact of the single-pole double-throw switch (SPDT) S2 passes sequentially through resistance R6 and lead-out terminal exports the 3rd electric signal, the electric capacity
C10 one end ground connection, the electric capacity C10 other end is connected between resistance R6 and lead-out terminal.
10. pH value electric signal generator circuit as claimed in claim 7, it is characterised in that the power circuit of the positive voltage
Further comprise one the 4th filter circuit and switch S1, the power circuit of the negative voltage further comprises one the 5th filtered electrical
Road, the 4th filter circuit includes electrochemical capacitor CE1 and electric capacity C6, and the 5th filter circuit includes electrochemical capacitor C3, electricity
Hold C4 and electric capacity C5, the positive pole of the electrochemical capacitor CE1 and electric capacity C6 one end are connected to the output end and electricity of dc source
Hinder between R1, the negative pole of the electrochemical capacitor CE1 and the electric capacity C6 other end are grounded, and the switch S1 is connected to dc source
Output end and electrochemical capacitor CE1 positive pole between, the positive pole of the electrochemical capacitor C3, the one of electric capacity C4 one end and electric capacity C5
End is connected between the output end of negative electricity source generator and resistance R2, the negative pole of the electrochemical capacitor C3, electric capacity C4 it is another
End and electric capacity the C5 other end are grounded, and the output end of dc source is connected to the power supply of negative electricity source generator by switching S1
End.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710382657.2A CN107024567B (en) | 2017-05-26 | 2017-05-26 | PH value electric signal generator circuit capable of simulating acid and alkali concentration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710382657.2A CN107024567B (en) | 2017-05-26 | 2017-05-26 | PH value electric signal generator circuit capable of simulating acid and alkali concentration |
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| CN107024567A true CN107024567A (en) | 2017-08-08 |
| CN107024567B CN107024567B (en) | 2023-07-21 |
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| CN204103760U (en) * | 2014-11-06 | 2015-01-14 | 航天长峰朝阳电源有限公司 | Positive negative output single channel continuously adjustabe power module |
| CN105226970A (en) * | 2015-10-28 | 2016-01-06 | 航天长峰朝阳电源有限公司 | The D.C. regulated power supply that output polarity is changed automatically |
| CN206848232U (en) * | 2017-05-26 | 2018-01-05 | 深圳市通恒科技有限公司 | It is a kind of to simulate acid, the pH value electric signal generator circuit of alkali concn |
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| CN2809595Y (en) * | 2005-07-19 | 2006-08-23 | 谈国民 | Self-correction mutual-correction device for PH meter and ion meter |
| CN203054658U (en) * | 2012-12-06 | 2013-07-10 | 四川高软软件科技有限公司 | Adjustable high-precision integrated voltage stabilizing system |
| CN203178231U (en) * | 2013-01-29 | 2013-09-04 | 云南民族大学 | Ph measuring instrument |
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| CN204103760U (en) * | 2014-11-06 | 2015-01-14 | 航天长峰朝阳电源有限公司 | Positive negative output single channel continuously adjustabe power module |
| CN105226970A (en) * | 2015-10-28 | 2016-01-06 | 航天长峰朝阳电源有限公司 | The D.C. regulated power supply that output polarity is changed automatically |
| CN206848232U (en) * | 2017-05-26 | 2018-01-05 | 深圳市通恒科技有限公司 | It is a kind of to simulate acid, the pH value electric signal generator circuit of alkali concn |
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|---|---|
| CN107024567B (en) | 2023-07-21 |
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