CN103343831B - A kind of intelligent electrical valve locator main board hardware circuit - Google Patents
A kind of intelligent electrical valve locator main board hardware circuit Download PDFInfo
- Publication number
- CN103343831B CN103343831B CN201310274058.0A CN201310274058A CN103343831B CN 103343831 B CN103343831 B CN 103343831B CN 201310274058 A CN201310274058 A CN 201310274058A CN 103343831 B CN103343831 B CN 103343831B
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- connects
- resistance
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electronic Switches (AREA)
- Power Sources (AREA)
Abstract
The present invention relates to a kind of intelligent electrical valve locator main board hardware circuit.Single chip circuit is connected with SC sigmal control loop, sensor conversion circuit, piezo electric valve control loop, liquid crystal display circuit, operation push-button circuit, warning circuit, valve position drive circuit respectively, and supply voltage circuit supplies the operating voltage of SC sigmal control loop, sensor conversion circuit, single chip circuit, piezo electric valve control loop, liquid crystal display circuit, operation push-button circuit, warning circuit, valve position drive circuit respectively.Beneficial effect is: if this main circuit is by the two-wire system 4-20mA signal gathering the setting valve opening come from regulator and the actual valve opening amount signal fed back, after single-chip microcomputer is to the calculating of two kinds of deviation of signals and deviation variation rate, the unlatching that corresponding control signal removes to control piezo electric valve is exported by fuzzy operation and decision-making, thus control the air inflow entering modulating valve air chamber, promote spool action with this and accurately locate, realizing the object that modulating valve regulates automatically.
Description
Technical field
The present invention relates to a kind of control circuit, particularly a kind of intelligent electrical valve locator main board hardware circuit.
Background technique
The automatic control of production process is called for short process control, occupies extremely important status in the industrial production.Process control develops into the Distributed Control System of analog-digital hybrid from analog control system, and develops into fieldbus control system further.The quality of process control depends on Controlling Apparatus for Processes to a great extent, comprises transmitter, regulator, final controlling element and various auxiliary device.Pneumatic control valve is a kind of final controlling element very important in the middle of process control, and valve positioner is as one of the main accessories of pneumatic control valve, can improve valve characteristic, improve the flexibility that the precision, speed and the increase that control control.Valve positioner, to intelligent, fieldbus instrument future development, brings the change of technology to process control, represent the developing direction of pneumatic actuator technology.More external major companies have succeeded in developing intelligent valve positioner in succession, and what have is configured with the field-bus interfaces such as HART agreement, PROFIBUS bus, FF bus, and domestic research in this respect is still in the starting stage.At present, the intelligent valve positioner that Domestic market generally uses, major part is more external major companies, as Siemens, Fei Xier, ABB etc., what domestic electropneumatic valve positioner adopted is traditional mechanical type force balance principle, come with some shortcomings and the needs of process control development can not be met, and it is expensive by the intelligent electric positioning work piece of external import, receipt period is long, Domestic market low cost can not be met far away, high-intelligentization, the demand of high progress, in the urgent need to developing a kind of low cost, high quality, high-intelligentization, the intelligent electric appliance valve positioner of high progress, therefore research and design Intelligent type positioner for electric controlled valve is very necessary.
Summary of the invention
In view of the current current condition of China and prior art Problems existing, the invention provides a kind of intelligent electrical valve locator main board hardware circuit, this circuit is intelligent electric valve positioner core component.The intelligent valve positioner motherboard circuit of development is based on 4 ~ 20mA electric current two-wire system valve navigation system, and general arrangement launches around the realization of low power consumption.If this main circuit is by the two-wire system 4-20mA signal gathering the setting valve opening come from regulator and the actual valve opening amount signal fed back, after single-chip microcomputer is to the calculating of two kinds of deviation of signals and deviation variation rate, the unlatching that corresponding control signal removes to control piezo electric valve is exported by fuzzy operation and decision-making, thus control the air inflow entering modulating valve air chamber, promote spool action with this and accurately locate, realizing the object that modulating valve regulates automatically.Meanwhile, above two paths of signals is carried out to the conversion of scale conversion and binary-coded decimal in single-chip microcomputer, so that carry out the percentage display of valve position stroke on a liquid crystal display.
The present invention for achieving the above object, take the design proposal of circuit to be: a kind of intelligent electrical valve locator main board hardware circuit, it is characterized in that: comprise SC sigmal control loop, sensor conversion circuit, single chip circuit, piezo electric valve control circuit, supply voltage circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, currrent feedback valve position drive circuit, described single chip circuit respectively with SC sigmal control loop, sensor conversion circuit, piezo electric valve control circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, currrent feedback valve position drive circuit connects, described supply voltage circuit supplies SC sigmal control loop respectively, sensor conversion circuit, single chip circuit, piezo electric valve control circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, the currrent feedback operating voltage of valve position drive circuit, SC sigmal control loop comprises tenminal block P, eliminator, measuring resistor, superior MCU amplifier, sensor conversion circuit comprises connector assembly X3, bleeder circuit, single chip circuit comprises single-chip microcomputer, crystal oscillating circuit, reset circuit, piezo electric valve control circuit comprises four output driving circuits, connecting terminal, supply voltage circuit comprises voltage-stabiliser tube mu balanced circuit, DC/DC change-over circuit, DC/DC step down transformer, liquid crystal display circuit comprises LCD MODULE, patch link, operation push-button circuit comprises bleeder circuit, touch key switch, warning circuit comprises NAND gate circuit, connector assembly X2, valve position drive circuit comprises not circuit, connector assembly X1.
Physical circuit connects: described SC sigmal control loop, No. 1 terminal signals positive pole of tenminal block P and the external 4-20mA signal of No. 2 terminal signals negative poles of tenminal block P, 2 of tenminal block P, 3, 4, No. 5 terminals also connect the one end simultaneously meeting magnetic bead L2, the pin two of another termination signal inductance L 5 of magnetic bead L2, the pin 4 of signal inductance L 5 connects one end of inductance L 4, one end of the other end connecting resistance R1 of inductance L 4, one end of the other end connecting resistance R2 of resistance R1, the positive pole of transient protection diode D1 and voltage-stabiliser tube D2 also meets benchmark status GND, No. 1 terminal of tenminal block P connects one end of magnetic bead L1, the pin one of another termination signal inductance L 5 of magnetic bead L1, the pin 3 of signal inductance L 5 connects one end of inductance L 3, the other end connecting resistance R3 of inductance L 3, resistance R4, one end of electric capacity C1 and the pin 8 of superior MCU amplifier U7, the other end of the other end connecting resistance R2 of electric capacity C1, resistance R3, another termination transient protection diode D1 of resistance R4, the negative pole of voltage-stabiliser tube D2 and the pin 6 of superior MCU amplifier U7, the negative pole of voltage-stabiliser tube D2 connects the positive pole of courage electrochemical capacitor C18, the negative pole of courage electrochemical capacitor C18 meets benchmark status GND, the negative pole of voltage-stabiliser tube D2 is 6V voltage of voltage regulation end, the pin one of superior MCU amplifier U7 connects 3V voltage, the pin 3 of superior MCU amplifier U7 meets benchmark status GND, the pin 4 connecting resistance R5 of superior MCU amplifier U7, one end of electric capacity C2, one end of another termination capacitor C21 of resistance R5, the general digital I/O pin 3 of single-chip microcomputer U6, electric capacity C2, the electric capacity C21 the other end is connected to benchmark status GND.
Described sensor conversion circuit, external conductive plastic potentiometer RW receives on connector assembly X3, No. 1 contact pin of connector assembly X3, No. 2 contact pins connect one end and the 2.5V voltage of electric capacity C3 after connecing, No. 3 contact pins of connector assembly X3 connect the other end of electric capacity C3, one end of electric capacity C4 and resistance R0, No. 4 contact pins of connector assembly X3 connect the other end of electric capacity C4, the other end of the other end connecting resistance R0 of one end of electric capacity C5 and benchmark status GND, electric capacity C5 and single-chip microcomputer U6 general digital I/O pin 4.
Described piezo electric valve control circuit, one end of general digital I/O pin 38 connecting resistance R19 of single-chip microcomputer U6 and the grid of field effect transistor Q7, the source electrode of another termination field effect transistor of resistance R19 Q7 and benchmark status GND, the grid of one end of drain electrode connecting resistance R20 of field effect transistor Q7, the negative pole of diode D9 and effect pipe Q8, the drain electrode of another termination field effect transistor Q8 of resistance R20 and the positive pole of 24V voltage, the positive pole of diode D9 connects the source electrode of field effect transistor Q8 and receives connecting terminal P4 contact by resistance R24.
One end of general digital I/O pin 39 connecting resistance R17 of single-chip microcomputer U6 and the grid of field effect transistor Q5, another termination 3V voltage of resistance R17, the source electrode of field effect transistor Q5 meets benchmark status GND, the grid of one end of drain electrode connecting resistance R18 of field effect transistor Q5, the negative pole of diode D8 and field effect transistor Q6, the drain electrode of another termination field effect transistor Q6 of resistance R18 and the positive pole of 24V voltage, the positive pole of diode D8 connects field effect transistor Q6 source electrode and receives connecting terminal P3 contact by resistance R22.
One end of general digital I/O pin 40 connecting resistance R15 of single-chip microcomputer U6 and the grid of field effect transistor Q3, the source electrode of another termination field effect transistor of resistance R15 Q3 and benchmark status GND, the grid of one end of drain electrode connecting resistance R16 of field effect transistor Q3, the negative pole of diode D7 and field effect transistor Q4, the drain electrode of another termination field effect transistor Q4 of resistance R16 and the positive pole of 24V voltage, the positive pole of diode D9 connects field effect transistor Q4 source electrode and receives connecting terminal P2 contact by resistance R22.
One end of general digital I/O pin 41 connecting resistance R13 of single-chip microcomputer U6 and the grid of field effect transistor Q1, another termination 3V voltage of resistance R13, the source electrode of field effect transistor Q1 meets benchmark status GND, one end of drain electrode connecting resistance R14 of field effect transistor Q1, the negative pole of diode D6 and effect field should the grids of pipe Q2, the drain electrode of another termination field effect transistor Q2 of resistance R16 and the positive pole of 24V voltage, the positive pole of diode D6 connects field effect transistor Q2 source electrode and receives connecting terminal P1 contact by resistance R21.
Described DC/DC change-over circuit, the pin two of DC/DC transducer U2 connects 3V positive polarity, the pin 5 of DC/DC transducer U2 meets benchmark status GND by electric capacity C11, the pin 4 of DC/DC transducer U2, pin 6, pin 7 is connected to benchmark status GND, the pin one of DC/DC transducer U2 connects the grid of field effect transistor Q9, the source electrode of field effect transistor Q9 connects the pin 8 of DC/DC transducer U2 and one end of resistance R26, the other end of resistance R26 is connected to benchmark status GND, the drain electrode of field effect transistor Q9 connects one end of disappear special pole diode D3 positive pole and inductance L 6, another termination 6V positive polarity of inductance L 6, disappear the negative pole connecting resistance R11 of special pole diode D3, electric capacity C10, courage electrochemical capacitor C13 positive pole, electric capacity C12, one end of resistance R27, the resistance R27 the other end is 24V voltage of voltage regulation end, the negative pole of courage electrochemical capacitor C13, another termination benchmark position GND of electric capacity C12, resistance R11, one end of the other end connecting resistance R12 of electric capacity C10 and the pin 3 of DC/DC transducer U2, another termination benchmark position GND of resistance R12, the pin one of DC/DC step-down controller U3, pin 3, one end of electric capacity C14 is connected to 6V voltage end positive pole, another termination benchmark position GND of electric capacity C14, the pin 4 of DC/DC step-down controller U3 meets benchmark status GND by electric capacity C25, the pin 5 of DC/DC step down transformer U3 connects the positive pole of courage electrochemical capacitor C19, one end of electric capacity C20, the negative pole of electricity courage solution electric capacity C19, another termination benchmark position GND of electric capacity C20, the pin 5 of DC/DC step-down controller U3 is 3V voltage end, DC/DC step-down controller U3 pin two meets benchmark status GND, the pin one of DC/DC step-down controller U4 connects 3V positive polarity, one end of electric capacity C15, the pin 3 of DC/DC step-down controller U4 connects one end of electric capacity C16, courage electrochemical capacitor C17 positive pole, , the pin 3 of DC/DC step-down controller U4 is 2.5V voltage of voltage regulation end, electric capacity C15, the other end of electric capacity C16, courage electrochemical capacitor C17 negative pole, the pin two of DC/DC step-down controller U4 meets benchmark status GND.
Described operation push-button circuit, one end of touch key K switch ey1, Key2, Key3 is connected to benchmark status GND, one end of the other end connecting resistance R9 of touch key K switch ey1 and the general digital I/O pipe DC/DC step down transformer pin 22 of single-chip microcomputer U6, one end of the other end connecting resistance R8 of touch key K switch ey2 and the general digital I/O pin two 1 of single-chip microcomputer U6, another termination 3V voltage of one end of the other end connecting resistance R7 of touch key K switch ey3 and the general digital I/O pin two 0, resistance R9 of single-chip microcomputer U6, resistance R8, resistance R7.
Described liquid crystal display circuit, No. 6 contact pins of liquid crystal display circuit connector assembly X4, No. 7 contact pins connect 3V voltage after connecing, No. 5 contact pins of connector assembly X4 meet benchmark status GND, No. 4 contact pins of connector assembly X4 connect the general digital I/O pin 47 of single-chip microcomputer U6, No. 3 contact pins of LCD connector assembly connect the general digital I/O pin 46 of single-chip microcomputer U6, No. 2 contact pins of connector assembly X4 connect the general digital I/O pin 45 of single-chip microcomputer U6, and No. 1 contact pin of connector assembly connects the general digital I/O pin 44 of single-chip microcomputer U6;
Described reset circuit connects: the pin one of reset circuit TC54 connects No. 7 contact pins of single-chip microcomputer U6 the RESET input 58 and connector assembly P0, and the pin two of reset circuit TC54 connects 3V voltage, and the pin 3 of reset circuit TC54 meets benchmark status GND.
Described warning circuit, the general digital I/O pin one 7 of single-chip microcomputer U6, pin one 8, pin one 9 connects the pin two of NAND gate circuit U7A respectively, the pin 5 of NAND gate circuit U7B, the pin one 0 of NAND gate circuit U7C, the pin one of NAND gate circuit U7A, the pin 4 of NAND gate circuit U7B, the pin 9 of NAND gate circuit U7C also connects the general digital I/O pin one 4 of single-chip microcomputer U6 after connecing, the pin 3 of NAND gate circuit U7A connects with No. 6 contact pins of connector assembly X2, the pin 6 of NAND gate circuit U7B connects with No. 7 contact pins of connector assembly X2, the pin 8 of NAND gate circuit U7C connects with No. 8 contact pins of connector assembly X2, the general digital I/O pin one 6 of single-chip microcomputer U6 connects with No. 1 contact pin of connector assembly X2, the general digital I/O pin one 2 of single-chip microcomputer U6 connects with No. 4 contact pins of connector assembly X2 and connects 3V voltage by resistance R6, connect No. 3 contact pins of connector assembly X2, No. 5 contact pins meet benchmark status GND, the pin one 2 of NAND gate circuit U7D, pin one 3 is connected to benchmark status GND, 11 pins of NAND gate circuit U7D are unsettled, 14 pins of NAND gate circuit U7D connect 3V voltage, 7 pins of NAND gate circuit U7D meet benchmark status GND.
Described valve position drive circuit, the general digital I/O pin one 5 of single-chip microcomputer U6 connects the pin 5 of not circuit U8C, the pin 6 of not circuit U8C, the pin one of NAND gate circuit U8A, the pin 3 of NAND gate circuit U8B, the pin 9 of NAND gate circuit U8D, the pin one 1 of NAND gate circuit U8E, the pin one 3 of NAND gate circuit U8F also connects together, the pin two of NAND gate circuit U8A, NAND gate circuit U8B pin 4, NAND gate circuit U8D pin 8, NAND gate circuit U8E pin one 0, NAND gate circuit U8F pin one 2 also connects together and No. 2 contact pins of connector assembly X1, No. 4 contact pins, No. 6 contact pins connect, 14 pins of NAND gate circuit U8A connect 3V voltage, 7 pins of NAND gate circuit U8A meet benchmark status GND, No. 1 contact pin of connector assembly X1, No. 3 contact pins, No. 5 contact pins are connected to benchmark status GND.
Described crystal oscillating circuit, the crystal resonator input pin 53 of single-chip microcomputer U6 connects one end of crystal oscillator CT and electric capacity C7, one end of another termination capacitor C8 of electric capacity C7 and the other end of another termination crystal oscillator CT of benchmark status GND, electric capacity C8 and the crystal resonator input pin 52 of single-chip microcomputer U6.
The analog power pin 64 of described single-chip microcomputer U6 connects 3V voltage; The pin in analog 62 of single-chip microcomputer U6, digitally pin 63 meet benchmark status GND, the digital power end pin one of single-chip microcomputer U6 connects 3V voltage, the pin 7 of single-chip microcomputer U6 connects one end of electric capacity C6, the pin one 0 of pin one 1 and benchmark status GND, single-chip microcomputer U6 that the other end of electric capacity C6 meets single-chip microcomputer U6 connects 2.5V positive polarity.
The invention has the beneficial effects as follows: the filter circuit design of hardware circuit input end of the present invention is chip magnetic bead and LC filtering, magnetic bead selects large volume, ferrite chip magnetic bead, parameter is 100 Europe/100mMHZ, is mainly used in electromagnetic interference and the hot-tempered acoustic jamming of high frequency in limiting circuitry.LC filtering, the closed inductance of B82793 digital signal that inductance selection EPSONDE company produces, level of integration is high, inhibition is good.Inductance is connected on circuit loop, is logical direct current, every interchange, lays particular emphasis on and suppresses conductive interference in loop, and medium and low frequency interference, and remaining higher harmonics is fallen by capacitive bypass.Circuit effectively inhibits High-frequency Interference, well have passed the signal of useful direct current, improves circuitry and makes immunity dry up.
the high-side signal of circuit signal control loop of the present invention detects amplification appliance, have employed flash detection scheme, it is high position detection resistance is placed between supply voltage and load, the pressure drop that this resistance is formed, special high side current detecting amplifier is adopted to amplify, this detection mode not only eliminates the grounding interference produced in the detection scheme of low limit, the accidental short circuit of voltage to circuit ground can also be detected, have compared with traditional IC detecting amplifier that measuring accuracy is high, conversion rate is fast, the feature that amplifying power is strong, and the anti-interference that can improve circuit.
Circuit single-chip microcomputer of the present invention is the core of circuit, the MSP430F169 single-chip microcomputer that this circuit utilizes is the mixed-signal processor of 16 super low-power consumptions that Texas Instruments (TexasInstruments) company produces, super low-power consumption is the characteristic that other single-chip microcomputers do not have, this circuit is exactly the power consumption utilizing this characteristic to reduce circuitry, it has low power supply voltage (voltage range 18V-36V) super low-power consumption, powerful Processing capacity, abundant chip peripheral module, system works is stablized, the advantages such as the function of convenient debugging, be applicable to the requirement being applied to the low power consumption of this circuit.
The piezo electric valve control circuit of circuit of the present invention, construct four road contactless electronic beam switch output driving circuits, every road devises two-stage and drives depletion field effect transistor, obtain larger drive amplification ability, have selected two-stage depletion field effect transistor is switching tube, than traditional crystal switch pipe, there is input resistance high, noise factor is little, good thermal stability, conversion rate is fast, high frequency characteristics is good, it is a kind of voltage control device, negative bias and reverse biased can be applied during work, also forward biased can be added, because this increasing flexibility and the diversity of circuit design, also improve the reliability and stability of circuit.
The supply voltage circuit of circuit of the present invention, supply voltage obtains completely from 4-20mA signal, voltage-stabiliser tube voltage stabilizing in supply voltage, DC/DC transducer have selected the integrated chip of low voltage power supply, super low-power consumption, be made up of two-stage supply voltage circuit, prime is voltage-stabiliser tube mu balanced circuit, rear class is DC/DC change-over circuit, and signal, by detecting resistance, converts 6V voltage of direct-flow voltage regulation to through voltage-stabiliser tube voltage stabilizing simultaneously; Convert three kinds of supply voltages required for circuit to by DC/DC transducer again, DC/DC boost converter, export the operating voltage of DC24V voltage supply output driving circuit, i.e. the operation voltage of piezo electric valve; DC/DC step-down controller exports the operating voltage that DC3V voltage supplies single-chip microcomputer, valve position drive circuit, alarm drive circuit, reset circuit respectively; DC/DC step-down controller exports DC2.5V voltage, the operating voltage of supply sensor conversion circuit.DC/D transducer adopts independent integrated voltage-stabilized chip, and added a pair decoupling capacitor in order to reduce power supply ripple at power output end, courage electrochemical capacitor lower pass-filter, 0.1UF magnetic sheet electric capacity filters high order together with ripple, has protected supply voltage global stability.
The reference potential of hardware circuit of the present invention creates integral ground mode, the reference ground (GND-earth potential) of each functional circuit is connected to same reference potential end, (GND-earth potential), and be connected with the reference potential of external control signal by tenminal block.Avoid the noise interference that ground loop brings, make circuit anti-interference, reliability is improved.Be connected in series the Chip-R of 5 ohm between the reference potential of circuit and the reference potential of external control signal, connecting this resistance is to protect rear polar circuit.
Circuit current feedback valve position drive circuit of the present invention, devise two-stage not circuit, rear class not circuit creates " line with " is connected, namely 5 not circuits are connected in parallel, the faint pulse signal served single-chip microcomputer exports amplifies driving and shaping operation, the square signal produced improves amplification and the driving force of circuit, and good shaping carried out to waveform, so that can well be detected by external currrent feedback module and in aimed at precision.
Accompanying drawing explanation
Fig. 1 is that circuit of the present invention connects block diagram;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is circuit terminal wiring diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of intelligent electrical valve locator main board hardware circuit, comprise SC sigmal control loop, sensor conversion circuit, single chip circuit, piezo electric valve control circuit, supply voltage circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, currrent feedback valve position drive circuit, SC sigmal control loop comprises tenminal block P, eliminator, measuring resistor, superior MCU amplifier.Sensor conversion circuit comprises connector assembly X3, bleeder circuit.Single chip circuit comprises single-chip microcomputer, crystal oscillating circuit, reset circuit, and piezo electric valve control circuit comprises four output driving circuits, connecting terminals.Supply voltage circuit comprises voltage-stabiliser tube mu balanced circuit, DC/DC change-over circuit, DC/DC step down transformer.Liquid crystal display circuit comprises LCD MODULE, patches link.Operation push-button circuit comprises bleeder circuit, touch key switch.Warning circuit comprises NAND gate circuit, connector assembly X2, and valve position drive circuit comprises not circuit, connector assembly X1; .
by regulator or DCS, the 4-20mA Setting signal that PLC sends here is connected on circuit board by tenminal block P, and successively through eliminator, superior MCU amplifier converts voltage signal to, the valve mechanical displacement simultaneously fed back by external conductive plastic potentiometer RW, feedback voltage signal is converted to through change-over circuit, above two kinds of signals input to the A/D converting analogue input channel of single-chip microcomputer respectively, single-chip microcomputer is to after the calculating of two kinds of deviation of signals and deviation variation rate, corresponding pulse signal is exported by fuzzy operation and decision-making, output pulse signal is through output driving circuit, connecting terminal is to piezo electric valve, control piezo electric valve is connected, disconnect DC24V voltage, achieve the unlatching controlling piezo electric valve, finally to control the air inflow entering modulating valve air chamber.The pulse signal that single-chip microcomputer exports simultaneously shows valve current location to LCD MODULE with percentage.4-20mA Setting signal constitutes one and controls show circuit.Supply voltage circuit is the operating voltage of each functional circuit of supply.Operation push-button can realize hand/conversion certainly, the action of manually-operable valve positioner, the function of program initialization and setting parameter.
In intelligent electrical valve locator main board hardware circuit, connector assembly X1 connects currrent feedback module as shown in Figure 3, be convenient to detect valve pivotal position, connector assembly X2 connects alarm module, in order to the fault state of prosecution valve, connector assembly X3 connects conductive plastic potentiometer RW, be convenient to valve mechanical displacement and convert voltage signal to, tenminal block P connection adjustor or DCS, the 4-20mA Setting signal that PIC sends here is to motherboard circuit, connecting terminal P1, P2, P3, P4 is for connecting piezo electric valve, realize the unlatching that motherboard circuit controls piezo electric valve, finally to control the air inflow entering modulating valve air chamber, reach the object of regulating and controlling valve events.
The selection of the detection resistance value R3 as shown in Figure 2 in high-side signal detecting amplifier should be low as far as possible, to keep power consumption controlled, but it is also enough large, can be detected amplifier detect and magnitude of voltage in aimed at precision to produce, selection 5 ohm of high-precision wafer resistance of 1/4W (0.1% precision) as calculated.Special superior MCU amplifier U1 have selected the MAX4372TESA into Maxim production, this flash CSA there are following characteristics: this chip has very high common mode input impedance, minimum input off-set voltage, the CMRR of the precision index lower than 1% and typical 100dB.These characteristics are the solution that in traditional flash CSA, common problem provides high performance-price ratio.And improve circuit measuring precision and transfer linearity degree, its compact package (SO-8) makes circuit board size be able to minimally, the little 25-6V of low power supply voltage, super low-power consumption, thus achieves the low requirement of attacking consumption of circuit.
The MSP430F169 single-chip microcomputer U6 that this circuit utilizes is the mixed-signal processor of 16 super low-power consumptions that TIX produces, single-chip microcomputer according to collect to determining voltage signal and valve position feedback voltage signal compares, computing output pulse signal controls pressure valve unlatching, realize automatically controlling tracking and locating.Inner integrated 2 the 16 bit timing devices of MSP430F169 single-chip microcomputer, 1 high speed, 12 A/D converters, the dual D/A converter of 12 or 8, single-chip microcomputer utilizes AD to gather the voltage signal of superior MCU amplifier output, AD is utilized to gather the feedback voltage signal of valve position sensor, the faint pulse signal that the two kinds of voltage signals collected export through single-chip data process, the unlatching of piezo electric valve can be controlled by output driving circuit, finally to control the air inflow entering modulating valve air chamber, automatically regulate and following function to realize valve.Single-chip microcomputer mainly enables single-chip microcomputer realize the function of data analysis and control circuit by programming.When system works, monolithic carries out the conversion of scale conversion and binary-coded decimal at machine to above two paths of signals, so that carry out the display of the percentage of valve stroke on a liquid crystal display.Realize automatic control and the display of valve stroke.
Piezo electric valve control loop, construct four road contactless electronic beam switch output driving circuits, every road devises two-stage CMOS and drives depletion field effect transistor, i.e. Q1-Q8 field effect transistor.The faint pulse voltage signal that single-chip microcomputer exports, controls CMOS type field effect transistor is led, is ended, with final control DC24V Voltage On state, disconnection piezo electric valve.Complete system intelligence and control object.
Voltage-stabiliser tube in supply voltage circuit, DC/DC transducer design around low power consumption, high conversion accuracy.6V voltage-stabiliser tube D2 have selected the BZV90C75V that PHILPS company produces, and has low in energy consumption, output voltage stabilization, and output current is large, and its compact package (SOT223) reduces size to circuit board.
DC/DC boost converter U2 selects the MAX1771 DC-DC converter control chip of MAXIM (Maxin) Company; can be used for multiple multi-form DC-DC change-over circuit; have the feature of low power consumption and high switching frequency concurrently; running current is no more than 110 uA; within when entering outage state, power consumption can be reduced to 5u A; device inside is integrated with the functional unit needed for multiple DC-DC transducer in addition; peripheral circuit is simple; be superior to traditional DC/DC switch technology, ultra-miniature package (SO-8) reduces size to circuit board.Stable output adjustable voltage, High Output Current, super low-power consumption improves control accuracy, stability, the reliability of complete machine, achieves the requirement of low power consumption.
DC/DC step-down controller U4 selection MAX6025AEUR-T is a kind of DC-DC converter control chip of MAXIM (Maxin) Company, output accuracy is high, super low-power consumption, small-sized encapsulation, these characteristics are the solution that problem common in conventional DC-DC converter provides high performance-price ratio.
By the trial-production to model machine, this circuit is feasible, and each phase technical order meets the demands, and reaches advanced international level.In a word the invention of this hardware circuit belong to domestic first.
Piezo electric valve control circuit, the faint control signal that single-chip microcomputer is exported controls the unlatching of piezo electric valve, finally to control the air inflow entering modulating valve air chamber by output driving circuit, connecting terminal.
Supply voltage comprises voltage-stabiliser tube mu balanced circuit, two-way DC/DC decompression converting circuit, a road DC/DC voltage up converting circuit, and its voltage of direct-flow voltage regulation exported supplies the operating voltage of response function circuit respectively.
Claims (1)
1. an intelligent electrical valve locator main board hardware circuit, it is characterized in that: comprise SC sigmal control loop, sensor conversion circuit, single chip circuit, piezo electric valve control circuit, supply voltage circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, currrent feedback valve position drive circuit, described single chip circuit respectively with SC sigmal control loop, sensor conversion circuit, piezo electric valve control circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, currrent feedback valve position drive circuit connects, described supply voltage circuit supplies SC sigmal control loop respectively, sensor conversion circuit, single chip circuit, piezo electric valve control circuit, liquid crystal display circuit, operation push-button circuit, warning circuit, the currrent feedback operating voltage of valve position drive circuit, SC sigmal control loop comprises tenminal block P, eliminator, measuring resistor, superior MCU amplifier, sensor conversion circuit comprises connector assembly X3, bleeder circuit, single chip circuit comprises single-chip microcomputer, crystal oscillating circuit, reset circuit, piezo electric valve control circuit comprises four output driving circuits, connecting terminal, supply voltage circuit comprises voltage-stabiliser tube mu balanced circuit, DC/DC change-over circuit, DC/DC step down transformer, liquid crystal display circuit comprises LCD MODULE, patch link, operation push-button circuit comprises bleeder circuit, touch key switch, warning circuit comprises NAND gate circuit, connector assembly X2, valve position drive circuit comprises not circuit, connector assembly X1,
Physical circuit connects: described SC sigmal control loop, No. 1 terminal signals positive pole of tenminal block P and the external 4-20mA signal of No. 2 terminal signals negative poles of tenminal block P, 2 of tenminal block P, 3, 4, No. 5 terminals also connect the one end simultaneously meeting magnetic bead L2, the pin two of another termination signal inductance L 5 of magnetic bead L2, the pin 4 of signal inductance L 5 connects one end of inductance L 4, one end of the other end connecting resistance R1 of inductance L 4, one end of the other end connecting resistance R2 of resistance R1, the positive pole of transient protection diode D1 and voltage-stabiliser tube D2 also meets benchmark status GND, No. 1 terminal of tenminal block P connects one end of magnetic bead L1, the pin one of another termination signal inductance L 5 of magnetic bead L1, the pin 3 of signal inductance L 5 connects one end of inductance L 3, the other end connecting resistance R3 of inductance L 3, resistance R4, one end of electric capacity C1 and the pin 8 of superior MCU amplifier U7, the other end of the other end connecting resistance R2 of electric capacity C1, resistance R3, another termination transient protection diode D1 of resistance R4, the negative pole of voltage-stabiliser tube D2 and the pin 6 of superior MCU amplifier U7, the negative pole of voltage-stabiliser tube D2 connects the positive pole of courage electrochemical capacitor C18, the negative pole of courage electrochemical capacitor C18 meets benchmark status GND, the negative pole of voltage-stabiliser tube D2 is 6V voltage of voltage regulation end, the pin one of superior MCU amplifier U7 connects 3V voltage, the pin 3 of superior MCU amplifier U7 meets benchmark status GND, the pin 4 connecting resistance R5 of superior MCU amplifier U7, one end of electric capacity C2, one end of another termination capacitor C21 of resistance R5, the general digital I/O pin 3 of single-chip microcomputer U6, electric capacity C2, the electric capacity C21 the other end is connected to benchmark status GND,
Described sensor conversion circuit, external conductive plastic potentiometer RW receives on connector assembly X3, No. 1 contact pin of connector assembly X3, No. 2 contact pins connect one end and the 2.5V voltage of electric capacity C3 after connecing, No. 3 contact pins of connector assembly X3 connect the other end of electric capacity C3, one end of electric capacity C4 and resistance R0, No. 4 contact pins of connector assembly X3 connect the other end of electric capacity C4, the other end of the other end connecting resistance R0 of one end of electric capacity C5 and benchmark status GND, electric capacity C5 and single-chip microcomputer U6 general digital I/O pin 4;
Described piezo electric valve control circuit, one end of general digital I/O pin 38 connecting resistance R19 of single-chip microcomputer U6 and the grid of field effect transistor Q7, the source electrode of another termination field effect transistor of resistance R19 Q7 and benchmark status GND, the grid of one end of drain electrode connecting resistance R20 of field effect transistor Q7, the negative pole of diode D9 and effect pipe Q8, the drain electrode of another termination field effect transistor Q8 of resistance R20 and the positive pole of 24V voltage, the positive pole of diode D9 connects the source electrode of field effect transistor Q8 and receives connecting terminal P4 contact by resistance R24;
One end of general digital I/O pin 39 connecting resistance R17 of single-chip microcomputer U6 and the grid of field effect transistor Q5, another termination 3V voltage of resistance R17, the source electrode of field effect transistor Q5 meets benchmark status GND, the grid of one end of drain electrode connecting resistance R18 of field effect transistor Q5, the negative pole of diode D8 and field effect transistor Q6, the drain electrode of another termination field effect transistor Q6 of resistance R18 and the positive pole of 24V voltage, the positive pole of diode D8 connects field effect transistor Q6 source electrode and receives connecting terminal P3 contact by resistance R22;
One end of general digital I/O pin 40 connecting resistance R15 of single-chip microcomputer U6 and the grid of field effect transistor Q3, the source electrode of another termination field effect transistor of resistance R15 Q3 and benchmark status GND, the grid of one end of drain electrode connecting resistance R16 of field effect transistor Q3, the negative pole of diode D7 and field effect transistor Q4, the drain electrode of another termination field effect transistor Q4 of resistance R16 and the positive pole of 24V voltage, the positive pole of diode D9 connects field effect transistor Q4 source electrode and receives connecting terminal P2 contact by resistance R22;
One end of general digital I/O pin 41 connecting resistance R13 of single-chip microcomputer U6 and the grid of field effect transistor Q1, another termination 3V voltage of resistance R13, the source electrode of field effect transistor Q1 meets benchmark status GND, one end of drain electrode connecting resistance R14 of field effect transistor Q1, the negative pole of diode D6 and effect field should the grids of pipe Q2, the drain electrode of another termination field effect transistor Q2 of resistance R16 and the positive pole of 24V voltage, the positive pole of diode D6 connects field effect transistor Q2 source electrode and receives connecting terminal P1 contact by resistance R21;
Described DC/DC change-over circuit, the pin two of DC/DC transducer U2 connects 3V positive polarity, the pin 5 of DC/DC transducer U2 meets benchmark status GND by electric capacity C11, the pin 4 of DC/DC transducer U2, pin 6, pin 7 is connected to benchmark status GND, the pin one of DC/DC transducer U2 connects the grid of field effect transistor Q9, the source electrode of field effect transistor Q9 connects the pin 8 of DC/DC transducer U2 and one end of resistance R26, the other end of resistance R26 is connected to benchmark status GND, the drain electrode of field effect transistor Q9 connects one end of disappear special pole diode D3 positive pole and inductance L 6, another termination 6V positive polarity of inductance L 6, disappear the negative pole connecting resistance R11 of special pole diode D3, electric capacity C10, courage electrochemical capacitor C13 positive pole, electric capacity C12, one end of resistance R27, the resistance R27 the other end is 24V voltage of voltage regulation end, the negative pole of courage electrochemical capacitor C13, another termination benchmark position GND of electric capacity C12, resistance R11, one end of the other end connecting resistance R12 of electric capacity C10 and the pin 3 of DC/DC transducer U2, another termination benchmark position GND of resistance R12, the pin one of DC/DC step-down controller U3, pin 3, one end of electric capacity C14 is connected to 6V voltage end positive pole, another termination benchmark position GND of electric capacity C14, the pin 4 of DC/DC step-down controller U3 meets benchmark status GND by electric capacity C25, the pin 5 of DC/DC step down transformer U3 connects the positive pole of courage electrochemical capacitor C19, one end of electric capacity C20, the negative pole of electricity courage solution electric capacity C19, another termination benchmark position GND of electric capacity C20, the pin 5 of DC/DC step-down controller U3 is 3V voltage end, DC/DC step-down controller U3 pin two meets benchmark status GND, the pin one of DC/DC step-down controller U4 connects 3V positive polarity, one end of electric capacity C15, the pin 3 of DC/DC step-down controller U4 connects one end of electric capacity C16, courage electrochemical capacitor C17 positive pole, , the pin 3 of DC/DC step-down controller U4 is 2.5V voltage of voltage regulation end, electric capacity C15, the other end of electric capacity C16, courage electrochemical capacitor C17 negative pole, the pin two of DC/DC step-down controller U4 meets benchmark status GND,
Described operation push-button circuit, one end of touch key K switch ey1, Key2, Key3 is connected to benchmark status GND, one end of the other end connecting resistance R9 of touch key K switch ey1 and the general digital I/O pipe DC/DC step down transformer pin 22 of single-chip microcomputer U6, one end of the other end connecting resistance R8 of touch key K switch ey2 and the general digital I/O pin two 1 of single-chip microcomputer U6, another termination 3V voltage of one end of the other end connecting resistance R7 of touch key K switch ey3 and the general digital I/O pin two 0, resistance R9 of single-chip microcomputer U6, resistance R8, resistance R7;
Described liquid crystal display circuit, No. 6 contact pins of liquid crystal display circuit connector assembly X4, No. 7 contact pins connect 3V voltage after connecing, No. 5 contact pins of connector assembly X4 meet benchmark status GND, No. 4 contact pins of connector assembly X4 connect the general digital I/O pin 47 of single-chip microcomputer U6, No. 3 contact pins of LCD connector assembly connect the general digital I/O pin 46 of single-chip microcomputer U6, No. 2 contact pins of connector assembly X4 connect the general digital I/O pin 45 of single-chip microcomputer U6, and No. 1 contact pin of connector assembly connects the general digital I/O pin 44 of single-chip microcomputer U6;
Described reset circuit connects: the pin one of reset circuit TC54 connects No. 7 contact pins of single-chip microcomputer U6 the RESET input 58 and connector assembly P0, and the pin two of reset circuit TC54 connects 3V voltage, and the pin 3 of reset circuit TC54 meets benchmark status GND;
Described warning circuit, the general digital I/O pin one 7 of single-chip microcomputer U6, pin one 8, pin one 9 connects the pin two of NAND gate circuit U7A respectively, the pin 5 of NAND gate circuit U7B, the pin one 0 of NAND gate circuit U7C, the pin one of NAND gate circuit U7A, the pin 4 of NAND gate circuit U7B, the pin 9 of NAND gate circuit U7C also connects the general digital I/O pin one 4 of single-chip microcomputer U6 after connecing, the pin 3 of NAND gate circuit U7A connects with No. 6 contact pins of connector assembly X2, the pin 6 of NAND gate circuit U7B connects with No. 7 contact pins of connector assembly X2, the pin 8 of NAND gate circuit U7C connects with No. 8 contact pins of connector assembly X2, the general digital I/O pin one 6 of single-chip microcomputer U6 connects with No. 1 contact pin of connector assembly X2, the general digital I/O pin one 2 of single-chip microcomputer U6 connects with No. 4 contact pins of connector assembly X2 and connects 3V voltage by resistance R6, connect No. 3 contact pins of connector assembly X2, No. 5 contact pins meet benchmark status GND, the pin one 2 of NAND gate circuit U7D, pin one 3 is connected to benchmark status GND, 11 pins of NAND gate circuit U7D are unsettled, 14 pins of NAND gate circuit U7D connect 3V voltage, 7 pins of NAND gate circuit U7D meet benchmark status GND,
Described valve position drive circuit, the general digital I/O pin one 5 of single-chip microcomputer U6 connects the pin 5 of not circuit U8C, the pin 6 of not circuit U8C, the pin one of NAND gate circuit U8A, the pin 3 of NAND gate circuit U8B, the pin 9 of NAND gate circuit U8D, the pin one 1 of NAND gate circuit U8E, the pin one 3 of NAND gate circuit U8F also connects together, the pin two of NAND gate circuit U8A, NAND gate circuit U8B pin 4, NAND gate circuit U8D pin 8, NAND gate circuit U8E pin one 0, NAND gate circuit U8F pin one 2 also connects together and No. 2 contact pins of connector assembly X1, No. 4 contact pins, No. 6 contact pins connect, 14 pins of NAND gate circuit U8A connect 3V voltage, 7 pins of NAND gate circuit U8A meet benchmark status GND, No. 1 contact pin of connector assembly X1, No. 3 contact pins, No. 5 contact pins are connected to benchmark status GND,
Described crystal oscillating circuit, the crystal resonator input pin 53 of single-chip microcomputer U6 connects one end of crystal oscillator CT and electric capacity C7, one end of another termination capacitor C8 of electric capacity C7 and the other end of another termination crystal oscillator CT of benchmark status GND, electric capacity C8 and the crystal resonator input pin 52 of single-chip microcomputer U6;
The analog power pin 64 of described single-chip microcomputer U6 connects 3V voltage; The pin in analog 62 of single-chip microcomputer U6, digitally pin 63 meet benchmark status GND, the digital power end pin one of single-chip microcomputer U6 connects 3V voltage, the pin 7 of single-chip microcomputer U6 connects one end of electric capacity C6, the pin one 0 of pin one 1 and benchmark status GND, single-chip microcomputer U6 that the other end of electric capacity C6 meets single-chip microcomputer U6 connects 2.5V positive polarity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310274058.0A CN103343831B (en) | 2013-07-02 | 2013-07-02 | A kind of intelligent electrical valve locator main board hardware circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310274058.0A CN103343831B (en) | 2013-07-02 | 2013-07-02 | A kind of intelligent electrical valve locator main board hardware circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103343831A CN103343831A (en) | 2013-10-09 |
| CN103343831B true CN103343831B (en) | 2015-08-26 |
Family
ID=49278649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310274058.0A Expired - Fee Related CN103343831B (en) | 2013-07-02 | 2013-07-02 | A kind of intelligent electrical valve locator main board hardware circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103343831B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727282A (en) * | 2013-12-05 | 2014-04-16 | 常熟市中凯仪表有限公司 | Electro-pneumatic valve positioning device |
| HUE045184T2 (en) | 2014-09-15 | 2019-12-30 | Flowserve Man Co | Sensors for valve systems, valve systems including sensors and related methods |
| CN106763978B (en) * | 2016-12-28 | 2022-11-11 | 浙江富春江环保科技研究有限公司 | Multi-trigger-mode high-speed pulse valve driver |
| CN108180307B (en) * | 2017-12-29 | 2019-11-22 | 武汉拓优智能股份有限公司 | Passive angle pedestal valve |
| CN109597430B (en) * | 2019-01-18 | 2023-04-18 | 东北农业大学 | Unmanned aerial vehicle system based on photo dimension-rising analysis |
| CN113790304B (en) * | 2021-08-23 | 2023-11-14 | 浙江中控技术股份有限公司 | Intrinsic safety HART communication system for intelligent valve positioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1441266A2 (en) * | 1997-07-23 | 2004-07-28 | Dresser, Inc. | Valve positioner system |
| CN201107611Y (en) * | 2007-11-02 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Intelligent electricity and gas regulation valve locater |
| CN101858457A (en) * | 2010-03-26 | 2010-10-13 | 潘辉义 | Intelligent electropneumatic valve positioner and control system |
-
2013
- 2013-07-02 CN CN201310274058.0A patent/CN103343831B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1441266A2 (en) * | 1997-07-23 | 2004-07-28 | Dresser, Inc. | Valve positioner system |
| CN201107611Y (en) * | 2007-11-02 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Intelligent electricity and gas regulation valve locater |
| CN101858457A (en) * | 2010-03-26 | 2010-10-13 | 潘辉义 | Intelligent electropneumatic valve positioner and control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103343831A (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103343831B (en) | A kind of intelligent electrical valve locator main board hardware circuit | |
| CN201508409U (en) | Intelligent battery data logging device | |
| CN101393245A (en) | Synthesis monitoring instrument for transformer | |
| CN106208369A (en) | A kind of on-line monitoring device of intelligent type low-voltage circuit breaker | |
| CN107359654A (en) | A kind of measuring instrument radio communication device power control system | |
| CN103576544A (en) | Terminal with OTG function | |
| CN107069649A (en) | A kind of electrical load safety operation control system | |
| CN103675431A (en) | Current collecting device on power transmission line | |
| CN201278008Y (en) | Transformer integrated monitor | |
| CN209311606U (en) | A kind of multifunctional electric meter | |
| CN108417002A (en) | A kind of high-performance MBUS collectors for water meter | |
| CN206072476U (en) | A kind of valve control device adjusted for fluid flow | |
| CN104502713A (en) | Low-power-consumption conductivity sensor applied to wireless transmission system | |
| CN107359690A (en) | Control device based on maximum photovoltaic power point tracking | |
| CN208076083U (en) | A kind of band temperature calibration output configurable type intelligent pressure sensor | |
| CN206946291U (en) | A kind of integral control circuit and vehicle identification system | |
| CN206807051U (en) | A kind of automatically controlled management system with low-power consumption | |
| CN205566263U (en) | Integrated circuit is sent in PWM control current signal isolation change | |
| CN206557143U (en) | Soil temperature-moisture sensor new-type circuit | |
| CN101609120B (en) | Intelligent power supply for detecting solenoid valve | |
| CN208806787U (en) | A kind of telemetering terminal power supply circuit | |
| CN209881495U (en) | Feeder terminal line loss device | |
| CN203551986U (en) | Sensor signal collection circuit | |
| CN203027137U (en) | Module for isolated conversion from one path of input into two paths of electric signal outputs | |
| CN202914850U (en) | Modified proportional valve drive return circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20190702 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |