CN104818487A - Discontinuous power supply switch power combined potentiostat - Google Patents
Discontinuous power supply switch power combined potentiostat Download PDFInfo
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- CN104818487A CN104818487A CN201510193483.6A CN201510193483A CN104818487A CN 104818487 A CN104818487 A CN 104818487A CN 201510193483 A CN201510193483 A CN 201510193483A CN 104818487 A CN104818487 A CN 104818487A
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Abstract
The invention relates to a discontinuous power supply switch power combined potentiostat. A plurality of switch power supplies are combined to provide a direct-current power supply, the weight and the size of the potentiostat are further reduced, a plurality of power-type MOSFET (metal-oxide-semiconductor field effect transistors) in one-to-one correspondence to the switch power supplies serve as electronic switches for controlling output or interrupting of polarization current of the switch power supplies, so that the switch power supplies synchronously work in a low-frequency environment, reliability of the potentiostat is effectively improved, the switch power supplies independently work, and maintenance difficulty and maintenance cost are reduced. Protective potential is set according to cathode protection requirements, output current is interrupted and cathode potential positively shifts when the cathode potential is negative relative to the set protective potential, the output current is conducted and the cathode potential negatively shifts when the cathode potential is positive relative to the protective potential, so that a protected object can acquire constant protective potential, energy consumption is effectively reduced, and environments are protected.
Description
Technical field
The present invention relates to the electronic device field being applied to galvanic protection, particularly relate to a kind of interruptedly supplying power switch power supply Combined constant potentiometer.
Background technology
Material all can be corroded processing, deposit, transport and be on active service in engineering, and wherein the corrosion that is subjected in process under arms of material is the most serious.The service safety of the material meeting serious threat works of corrosion, also brings serious loss to national economy simultaneously.Therefore, in order to suppress or delay the corrosion of material, the method for existing general employing impressed current cathodic protection realizes the protection to material, and is widely used in the aspects such as harbour engineering, buried pipeline and naval vessel.Potentiostat is the most important equipment realizing impressed current cathodic protection; itself and protected object form closed loop adjustment; energising point current potential is measured by reference electrode; compare as sampled signal and control signal; realize controlling and regulating polarizing current to export; thus make protected object produce cathodic polarization to protected object injection electronics, suppress or delay the corrosion of protected object thus.
Tradition potentiostat product is in order to ensure that the current potential of protected object is remained on the controlling potential of setting, and its circuit is all adopt the mode of continuous output current to design.So, potentiostat needs constantly outward current can realize the protection to protected object, not only big energy-consuming in the course of the work, and is unfavorable for protection of the environment.Moreover, for the potentiostat of inversion type direct-current source design, under the many and injectron of element is in high-frequency and high-voltage, equipment dependability is caused to reduce, maintenance difficult.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of interruptedly supplying power switch power supply Combined constant potentiometer is provided.By adopting the combination of many group switch power supplies to provide direct supply, the weight and volume of equipment is reduced further; Each switch power supply works asynchronously, and separate, reduces maintenance difficulty and maintenance cost; Other electron component except switch power supply works under being all in low frequency, improves the reliability of potentiostat; And protection potential is set according to the requirement of galvanic protection, when making cathode potential be defeated by the protection potential of setting, outward current disconnects, and cathode potential is shuffled; Make cathode potential just when protection potential, outward current conducting, cathode potential is negative moves, thus while ensureing that protected object obtains constant protection potential, effectively reduces energy consumption, protection of the environment.
In order to overcome the above-mentioned defect of traditional potentiostat, the invention provides a kind of employing interruptedly supplying power switch power supply Combined constant potentiometer, adopting many group switch power supply combination techniques, the weight and volume of equipment is reduced further; And each switch power supply synchronous working, and separate, only need change for the switch power supply broken down during maintenance, easy to maintenance, low cost; Work under other electronic components except switch power supply are all in low frequency environments, improve the reliability of potentiostat; And protection potential is set according to the requirement of galvanic protection, when making cathode potential be defeated by the protection potential of setting, outward current disconnects, and cathode potential is shuffled; Make cathode potential just when protection potential, outward current conducting, cathode potential is negative moves, thus while ensureing that protected object obtains constant protection potential, effectively reduces energy consumption, protection of the environment.
The present invention is achieved by the following technical solutions: a kind of interruptedly supplying power switch power supply Combined constant potentiometer, it comprises
Cathode potential control module, for monitoring in real time and measuring cathode potential, produces a feedback voltage, and described feedback voltage and the given voltage preset are carried out to process and obtain a make-and-break signal;
Switch power module, for generation of polarizing current;
Switch on and off module, for switching on or off described switch power module, realizes output or the cut-out of polarizing current;
And break-make driver module, for receiving the described make-and-break signal of described cathode potential control module, and control being turned on or off of switch on and off module according to described make-and-break signal.
Described feedback voltage be a reference electrode preset and external cathode protect load blocks negative electrode between potential difference; Described given voltage be described reference electrode and external cathode protect load blocks cathodic protection potential between potential difference.
When described feedback voltage is defeated by or equals given voltage, described cathode potential control module output low level make-and-break signal is to break-make driver module, and break-make driver module is closed, and described switch on and off module disconnects, and polarizing current cuts off; Described feedback voltage is just when given voltage; described cathode potential control module exports high level make-and-break signal to break-make driver module; break-make driver module is opened and is driven the conducting of described switch on and off module, and the polarizing current of switch power module exports described external cathode protection load blocks to by switch on and off module.
Described switch power module comprises multiple switch power supply, and described switch on and off module comprises respectively with multiple switch power supply one_to_one corresponding and separate multiple electronic switch; The negative output terminal of described multiple switch power supply altogether, and forms one for accessing the total output terminal of negative pole of the negative electrode of described external cathode protection load blocks; The positive output terminal electrical connection of the switch power supply that the first terminal of described multiple electronic switch is corresponding with it respectively; its second terminal is electrically connected on a wherein output terminal of described break-make driver module respectively; its the 3rd terminal is electrically connected on another output terminal of described break-make driver module jointly, and forms one for accessing the total output terminal of positive pole of the anode of described external cathode protection load blocks.
Relation between the electric current I that the switch power supply quantity n of the rated current In that described potentiostat exports and described switch power module and each switch power supply export meets In=n × I.
Each electronic switch is power-type MOSFET field effect transistor.
Described cathode potential control module comprises the first step operational amplification circuit and second stage operational amplification circuit that connect successively; A described first step operational amplification circuit wherein input terminal is electrically connected with the total output terminal of described negative pole, and another input terminal connects with the reference electrode electrical preset; Described second stage operational amplification circuit is the described given voltage of an input terminal access wherein, and another input terminal is electrically connected with the output terminal of first step operational amplification circuit.
Described break-make driver module comprises triode type photoelectrical coupler and transistor drive circuit; The power input terminal cut into operation power supply of described triode type photoelectrical coupler, its electric signal input end is electrically connected with described second stage operational amplification circuit output terminal, its emtting electrode output terminal by the electrical connection of its base stage output terminal of a RC shunt circuit, and forms a make-and-break signal output terminal.Described transistor drive circuit comprises triode, the first base resistance, the second base resistance and collector resitance; Described transistor base is electrically connected with collector output of described triode type photoelectrical coupler by described first base resistance; Described second base resistance one end is electrically connected between transistor base and the first base resistance, and the other end is electrically connected with transistor collector by described collector resitance, and accesses bias supply between described second base resistance and collector resitance; Draw a break-make drive terminal between described transistor collector and collector resitance, its emtting electrode is electrically connected with described make-and-break signal output terminal.
The grid of described multiple power-type MOSFET field effect transistor is electrically connected with described break-make drive terminal respectively by a resistance; the positive output terminal electrical connection of the switch power supply that the drain electrode of described multiple power-type MOSFET field effect transistor is corresponding with it respectively; the source electrode of described multiple power-type MOSFET field effect transistor is electrically connected on the emtting electrode of described triode jointly, and forms the total output terminal of positive pole of the described anode for accessing external cathode protection load blocks.
Be connected with a diode between the total output terminal of described negative pole and the total output terminal of described positive pole, and the total output terminal of described negative pole and the total output terminal of described positive pole are electrically connected with the input terminal of this diode and output terminal respectively.
By technique scheme, interruptedly supplying power switch power supply Combined constant potentiometer of the present invention provides direct supply by adopting the combination of many group switch power supplies, and the weight and volume of equipment is reduced further; By using respectively with organize switch power supply multiple power-type MOSFET field effect transistor electronic switch of exporting as the polarizing current of trip switch power supply or disconnect one to one more, each switch power supply is worked asynchronously, and it is separate, during maintenance, only need carry out changing for the switch power supply broken down, reduce maintenance difficulty and maintenance cost; Other electron component except switch power supply is all in low frequency environments work, improves the reliability of potentiostat; And protection potential is set according to the requirement of galvanic protection, when making cathode potential be defeated by the protection potential of setting, outward current disconnects, and cathode potential is shuffled; Make cathode potential just when protection potential, outward current conducting, cathode potential is negative moves, thus while ensureing that protected object obtains constant protection potential, effectively reduces energy consumption, protection of the environment.
In order to understand better and implement, describe the present invention in detail below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of interruptedly supplying power switch power supply Combined constant potentiometer of the present invention;
Fig. 2 is the circuit structure schematic diagram of interruptedly supplying power switch power supply Combined constant potentiometer of the present invention;
Circuit block diagram when Fig. 3 is interruptedly supplying power switch power supply Combined constant potentiometer of the present invention access external cathode protection load blocks.
Embodiment
Please refer to Fig. 1 and Fig. 2, interruptedly supplying power switch power supply Combined constant potentiometer of the present invention comprises cathode potential control module 1, break-make driver module 2, switch on and off module 3 and switch power module 4.
Described cathode potential control module 1, for monitoring in real time and measuring the cathode potential of external cathode protection load blocks, produces a feedback voltage, and described feedback voltage and the given voltage preset is carried out to process and obtain a make-and-break signal.In the present invention, described feedback voltage be a reference electrode preset and external cathode protect load blocks negative electrode between potential difference; Described given voltage be described reference electrode and external cathode protect load blocks cathodic protection potential between potential difference.Particularly, described cathode potential control module 1 comprises the first step operational amplification circuit 11 and second stage operational amplification circuit 12 that connect successively; A described first step operational amplification circuit 11 wherein input terminal is electrically connected with the negative output terminal of switch power module 4, and another input terminal connects with the reference electrode electrical preset; A described second stage operational amplification circuit 12 wherein input terminal is electrically connected with the output terminal of given voltage, and another input terminal is electrically connected with the output terminal of first step operational amplification circuit 11.
Further, described first step operational amplification circuit 11 draws feedback voltage for measuring, and it comprises operational amplifier IC1, resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5.First signal input terminal of described operational amplifier IC1 is electrically connected with the negative output terminal of switch power module 4 by resistance R1 and altogether, its second signal input terminal is electrically connected with reference electrode input terminal by resistance R2, and its output terminal output feedack voltage is to second stage operational amplification circuit 12.Described resistance R3 one end is electrically connected on one end of resistance R1 ground connection, and the other end is electrically connected on one end of resistance R4.The other end of described resistance R4 is electrically connected between the second signal input terminal of resistance R2 and operational amplifier IC1.Described resistance R5 one end is electrically connected between resistance R1 and first signal input terminal of operational amplifier IC1, and the other end is electrically connected on the output terminal of operational amplifier IC1.Due to the DC offset voltage that the second signal input terminal of operational amplifier IC1 has R4 to introduce, the output terminal of operational amplifier IC1 can obtain the low impedance feedback voltage matched with dissimilar reference electrode, thus realizes acquisition and the output of first step operational amplification circuit 11 pairs of feedback voltages.
Further, described second stage operational amplification circuit 12 is for comparing feedback voltage and given voltage, and exporting the adjustment that comparative result realizes anticathode current potential, it comprises operational amplifier IC2, resistance R6, slide rheostat R0, resistance R7, resistance R8, resistance R9 and resistance R10.First signal input terminal of described operational amplifier IC2 is electrically connected with resistance R8, slide rheostat R0 and resistance R6 successively, its second signal input terminal is electrically connected with the output terminal of operational amplifier IC1 by resistance R9, the working power of its power input terminal access+12V, its the 3rd input terminal access resistance R7, its output terminal exports described make-and-break signal to described break-make driver module 2.Described resistance R6 one end is electrically connected between resistance R3 and resistance R4, and the other end is electrically connected on one end of slide rheostat R0.The slip variable resistance end of described slide rheostat R0 is electrically connected with first signal input terminal of operational amplifier IC2 by resistance R8, and the other end being electrically connected on one end of resistance R6 in slide rheostat R0 relative is electrically connected with the 3rd input terminal of operational amplifier IC2 by resistance R7.Described resistance R10 one end is electrically connected between resistance R8 and first signal input terminal of operational amplifier IC2, and the other end is electrically connected on the output terminal of operational amplifier IC2.By the millivolt level setting regulating voltage-divider R7, R6, R3 and slide rheostat R0 to realize given voltage.Described second stage operational amplification circuit 12 is by carrying out high-precision comparison by the given voltage obtained from slide rheostat R0 with from the feedback voltage that the output terminal of operational amplifier IC1 obtains at operational amplifier IC2, and the output terminal realizing operational amplifier IC2 produces high level or low level make-and-break signal.
Described break-make driver module 2 for receiving the described make-and-break signal of described cathode potential control module 1, and controls being turned on or off of switch on and off module 3 according to described make-and-break signal.Particularly, described break-make driver module 2 comprises optical coupler and driver module.In the present embodiment, described optical coupler is triode type photoelectrical coupler, and described driver module is transistor drive circuit.
Further, the power input terminal cut into operation power supply of described triode type photoelectrical coupler IC3, in the present embodiment, the working power of the described+12V of its power input terminal access; Electric signal input end of described triode type photoelectrical coupler IC3 is electrically connected with the output terminal of described second stage operational amplification circuit 12 by a resistance R11, and also namely its electric signal input end is electrically connected with the output terminal of described operational amplifier IC2 by a resistance R11; Collector output of described triode type photoelectrical coupler IC3 is the first make-and-break signal output terminal, and it exports make-and-break signal to described transistor drive circuit; The emtting electrode output terminal of described triode type photoelectrical coupler IC3 is electrically connected with its base stage output terminal by a RC shunt circuit, and forms the second make-and-break signal output terminal, and it exports make-and-break signal to described transistor drive circuit.
Further, described transistor drive circuit comprises triode BG1, the first base resistance R13, the second base resistance R14 and collector resitance R15.Described triode BG1 base stage is electrically connected with collector output (being also the first make-and-break signal output terminal) of described triode type photoelectrical coupler IC3 by described first base resistance R13; Described second base resistance R14 one end is electrically connected between triode BG1 base stage and the first base resistance R13, the other end is electrically connected with triode BG1 collector electrode by described collector resitance R15, and accesses bias supply+12V between described second base resistance R14 and collector resitance R15; A break-make drive terminal J2 is drawn between described triode BG1 collector electrode and collector resitance R15.
Described switch power module 4 is for generation of polarizing current, and it comprises multiple switch power supply (E1, E2, E3 ~ En), and the outward current of each switch power supply is in the same size.The negative output terminal of described multiple switch power supply (E1, E2, E3 ~ En) altogether; and forming one for accessing the total output terminal of negative pole of the negative electrode of external cathode protection load blocks, the total output terminal of this negative pole is also the negative output terminal Y-of potentiostat of the present invention.
Further, the relation between the electric current I that exports of the switch power supply quantity n of the rated current In that exports of potentiostat of the present invention and described switch power module 4 and each switch power supply meets In=n × I.
Described switch on and off module 3, for switching on or off described switch power module 4, realizes output or the cut-out of polarizing current.Particularly, described switch on and off module 3 comprises respectively with multiple switch power supply (E1, E2, E3 ~ En) one_to_one corresponding and separate multiple electronic switch (Q1, Q2, Q3 ~ Qn).Described multiple electronic switch (Q1, Q2, Q3 ~ Qn) the positive output terminal electrical connection of corresponding with it the respectively switch power supply of the first terminal, its second terminal is electrically connected on a wherein output terminal (i.e. described break-make drive terminal J2) of described break-make driver module 2 respectively, its the 3rd terminal is electrically connected on another output terminal (i.e. the emtting electrode output terminal of triode type photoelectrical coupler IC3) of described break-make driver module jointly, and form one for accessing the total output terminal of positive pole of the anode of external cathode protection load blocks, the total output terminal of this positive pole is also the positive output end Y+ of potentiostat of the present invention.
In the present embodiment, each electronic switch is power-type MOSFET field effect transistor, then multiple electronic switch is multiple power-type MOSFET field effect transistor.The grid of described multiple power-type MOSFET field effect transistor (Q1, Q2, Q3 ~ Qn) is electrically connected with described break-make drive terminal J2 respectively by a resistance; The positive output terminal electrical connection of the switch power supply that the drain electrode of described multiple power-type MOSFET field effect transistor (Q1, Q2, Q3 ~ Qn) is corresponding with it respectively; The source electrode of described multiple power-type MOSFET field effect transistor (Q1, Q2, Q3 ~ Qn) is electrically connected on the emtting electrode of described triode BG1 jointly, and forms the total output terminal of positive pole of the described anode for accessing external cathode protection load blocks.
Further, in order to avoid the polarizing current reaching hundreds of ampere likely produces the reverse impulse endangering field effect transistor in instrument internal and external cable distributed inductance in the moment of cutting off, instrument output terminal (positive output end Y+ and negative output terminal Y-) Opposite direction connection diode D1 in parallel, also be, be connected with diode D1 between the total output terminal of described negative pole and the total output terminal of described positive pole, and the total output terminal of described negative pole and the total output terminal of described positive pole are electrically connected with the input terminal of this diode D1 and output terminal respectively.
When described feedback voltage is defeated by or is equaled given voltage, described cathode potential control module 1 output low level make-and-break signal is to break-make driver module 2, also be, obtained by first step operational amplification circuit 11 and process the current potential of reference electrode and the cathode potential of external cathode protection load blocks, obtain corresponding feedback voltage and export second stage operational amplification circuit 12 to, by second stage operational amplification circuit 12, this feedback voltage and given voltage are compared process, a lower level make-and-break signal can be obtained, then low level make-and-break signal cannot drive break-make module 2 to open, now break-make driver module 2 is closed, switch on and off module 3 disconnects, polarizing current cuts off.When described feedback voltage is just in given voltage; described cathode potential control module 1 exports high level make-and-break signal to break-make driver module 2; break-make driver module 2 is opened and is driven the conducting of described switch on and off module 3, and the polarizing current of switch power module 4 exports described external cathode protection load blocks to by switch on and off module 3.
The principle of work of interruptedly supplying power switch power supply Combined constant potentiometer of the present invention is:
Refer to Fig. 3; first; access external cathode protection load blocks 5; by the negative output terminal Y-needing the object (as metal) be protected cathodically to be linked into potentiostat of the present invention; and the positive output end Y+ of potentiostat of the present invention accesses supplementary anode (as MMO anode), the reference electrode input terminus C of potentiostat of the present invention accesses reference electrode simultaneously.And connect 220V alternating-current in the power input port of each switch power supply, make potentiostat of the present invention in running order.
So; described cathode potential control module 1 is ceaselessly monitored the cathode potential of protected object; be defeated by when the feedback voltage recorded or equal given voltage; now cathode potential is defeated by or is equaled the protection potential of setting, and described cathode potential control module 1 output low level make-and-break signal is to break-make driver module 2, and break-make driver module 2 is closed; switch on and off module 3 disconnects; polarizing current cuts off, and cathode potential is shuffled, and now protected object is still protected.When the feedback voltage recorded is just in given voltage; now cathode potential is just in protection potential; described cathode potential control module 1 exports high level make-and-break signal to break-make driver module 2; break-make driver module 2 is opened and is driven the conducting of described switch on and off module 3; the polarizing current of switch power module 4 exports described external cathode protection load blocks 5 to by switch on and off module 3; polarizing current conducting, cathode potential is negative moves, and makes protected object obtain constant protection potential.
For the ease of understanding, the present invention utilizes concrete numerical value to be described above-mentioned principle of work, such as, a protection potential-850mV (relative to Ag/AgCl reference electrode) is set according to the requirement of galvanic protection, when the protection potential of the protected object recorded is defeated by-850mV, namely the feedback voltage that first step operational amplification circuit records is defeated by-850mV, described cathode potential control module 1 output low level make-and-break signal is to break-make driver module 2, break-make driver module 2 is closed, described switch on and off module 3 disconnects, polarizing current cuts off, cathode potential is shuffled, now protected object is still protected.When the current potential of protected object is just moving to just in-850mV; namely the feedback voltage that records of first step operational amplification circuit is just in-850mV; described cathode potential control module 1 exports high level make-and-break signal to break-make driver module 2; break-make driver module 2 is opened and is driven the conducting of described switch on and off module 3; the polarizing current of switch power module 4 exports described external cathode protection load blocks 5 to by switch on and off module 3; outward current conducting; cathode potential is negative moves, and makes protected object obtain constant protection potential.
Above-mentioned example sets a numerical value so that principle of work of the present invention to be described for the ease of understanding to protection potential; protection potential mentioned by the present invention is actually a dynamic process; just as the dynamic process of negative voltage feedback of electronic circuit the same, result is exactly a constant value (obtains one constant protection potential).Above-mentioned given numerical value, only as illustrating, can not get a protection potential value of specifically fixing at each measuring point in reality, but can see the waveform correlation of current switching with oscilloscope.
Relative to prior art, interruptedly supplying power switch power supply Combined constant potentiometer of the present invention provides direct supply by adopting the combination of many group switch power supplies, and the weight and volume of equipment is reduced further; By using respectively with organize switch power supply multiple power-type MOSFET field effect transistor electronic switch of exporting as the polarizing current of trip switch power supply or disconnect one to one more, each switch power supply is worked asynchronously, and separate, reduce maintenance difficulty and maintenance cost; Other electron component except switch power supply works under being in low frequency, improves the reliability of potentiostat; And protection potential is set according to the requirement of galvanic protection, when making cathode potential be defeated by the protection potential of setting, outward current disconnects, and cathode potential is shuffled; Make cathode potential just when protection potential, outward current conducting, cathode potential is negative moves, thus while ensureing that protected object obtains constant protection potential, effectively reduces energy consumption, protection of the environment.
The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or distortion, if these are changed and distortion belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these changes and distortion.
Claims (10)
1. an interruptedly supplying power switch power supply Combined constant potentiometer, is characterized in that: comprise
Cathode potential control module, for monitoring in real time and measuring cathode potential, produces a feedback voltage, and to described feedback electricity
Pressure is carried out process with the given voltage preset and is obtained a make-and-break signal;
Switch power module, for generation of polarizing current;
Switch on and off module, for switching on or off described switch power module, realizes output or the cut-out of polarizing current;
And break-make driver module, for receiving the described make-and-break signal of described cathode potential control module, and control being turned on or off of switch on and off module according to described make-and-break signal.
2. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 1, is characterized in that: described feedback voltage be a reference electrode preset and external cathode protect load blocks negative electrode between potential difference; Described given voltage be described reference electrode and external cathode protect load blocks cathodic protection potential between potential difference.
3. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 2, it is characterized in that: when described feedback voltage is defeated by or equals given voltage, described cathode potential control module output low level make-and-break signal is to break-make driver module, break-make driver module is closed, described switch on and off module disconnects, and polarizing current cuts off; Described feedback voltage is just when given voltage; described cathode potential control module exports high level make-and-break signal to break-make driver module; break-make driver module is opened and is driven the conducting of described switch on and off module, and the polarizing current of switch power module exports described external cathode protection load blocks to by switch on and off module.
4. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 1, it is characterized in that: described switch power module comprises multiple switch power supply, and described switch on and off module comprises respectively with multiple switch power supply one_to_one corresponding and separate multiple electronic switch; The negative output terminal of described multiple switch power supply altogether, and forms one for accessing the total output terminal of negative pole of the negative electrode of described external cathode protection load blocks; The positive output terminal electrical connection of the switch power supply that the first terminal of described multiple electronic switch is corresponding with it respectively; its second terminal is electrically connected on a wherein output terminal of described break-make driver module respectively; its the 3rd terminal is electrically connected on another output terminal of described break-make driver module jointly, and forms one for accessing the total output terminal of positive pole of the anode of described external cathode protection load blocks.
5. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 4, is characterized in that: the relation between the electric current I that the switch power supply quantity n of the rated current In that described potentiostat exports and described switch power module and each switch power supply export meets In=n × I.
6. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 4, is characterized in that: each electronic switch is power-type MOSFET field effect transistor.
7. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 6, is characterized in that: described cathode potential control module comprises the first step operational amplification circuit and second stage operational amplification circuit that connect successively;
A described first step operational amplification circuit wherein input terminal is electrically connected with the total output terminal of described negative pole, and another input terminal connects with the reference electrode electrical preset;
Described second stage operational amplification circuit is the described given voltage of an input terminal access wherein, and another input terminal is electrically connected with the output terminal of first step operational amplification circuit.
8. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 7, is characterized in that: described break-make driver module comprises triode type photoelectrical coupler and transistor drive circuit;
The power input terminal cut into operation power supply of described triode type photoelectrical coupler, its electric signal input end is electrically connected with described second stage operational amplification circuit output terminal, its emtting electrode output terminal by the electrical connection of its base stage output terminal of a RC shunt circuit, and forms a make-and-break signal output terminal;
Described transistor drive circuit comprises triode, the first base resistance, the second base resistance and collector resitance; Described transistor base is electrically connected with collector output of described triode type photoelectrical coupler by described first base resistance;
Described second base resistance one end is electrically connected between transistor base and the first base resistance, and the other end is electrically connected with transistor collector by described collector resitance, and accesses bias supply between described second base resistance and collector resitance;
Draw a break-make drive terminal between described transistor collector and collector resitance, its emtting electrode is electrically connected with described make-and-break signal output terminal.
9. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 8; it is characterized in that: the grid of described multiple power-type MOSFET field effect transistor is electrically connected with described break-make drive terminal respectively by a resistance; the positive output terminal electrical connection of the switch power supply that the drain electrode of described multiple power-type MOSFET field effect transistor is corresponding with it respectively; the source electrode of described multiple power-type MOSFET field effect transistor is electrically connected on the emtting electrode of described triode jointly, and forms the total output terminal of positive pole of the described anode for accessing external cathode protection load blocks.
10. interruptedly supplying power switch power supply Combined constant potentiometer according to claim 4, it is characterized in that: between the total output terminal of described negative pole and the total output terminal of described positive pole, be connected with a diode, and the total output terminal of described negative pole and the total output terminal of described positive pole are electrically connected with the input terminal of this diode and output terminal respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107723713A (en) * | 2017-12-08 | 2018-02-23 | 江苏飞视文化发展有限公司 | The system of potentiostat in a kind of cathodic protection system of monitoring in real time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723713A (en) * | 2017-12-08 | 2018-02-23 | 江苏飞视文化发展有限公司 | The system of potentiostat in a kind of cathodic protection system of monitoring in real time |
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|---|---|
| CN104818487B (en) | 2017-11-14 |
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Effective date of registration: 20180102 Address after: 510230 Guangzhou Qianjin Road, Guangdong, No. 157 Co-patentee after: CCCC Fourth Harbor Engineering Co., Ltd. Patentee after: Zhongjiao Sihang Engineering Inst. Co., Ltd. Co-patentee after: Guangzhou Harbor Engineering Quality Examination Co., Ltd. Address before: 510230 Haizhuqu District Road, Guangzhou, Guangzhou, Guangdong Province, No. 157 Co-patentee before: Guangzhou Harbor Engineering Quality Examination Co., Ltd. Patentee before: Zhongjiao Sihang Engineering Inst. Co., Ltd. Co-patentee before: CCCC Fourth Harbor Geotechnical Engineering Co., Ltd. Co-patentee before: Guangzhou Sihang Material Technology Co., Ltd. |
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