CN204042130U - A kind of proportional valve control system - Google Patents
A kind of proportional valve control system Download PDFInfo
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- CN204042130U CN204042130U CN201420357787.2U CN201420357787U CN204042130U CN 204042130 U CN204042130 U CN 204042130U CN 201420357787 U CN201420357787 U CN 201420357787U CN 204042130 U CN204042130 U CN 204042130U
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Abstract
The utility model discloses a kind of proportional valve control system, comprise the signal generating circuit, signal amplification circuit, signal comparator circuit, the power driving circuit that are connected successively; The output terminal of described power driving circuit connects signal generating circuit described in electric-hydraulic proportion solenoid valve for generation of signal; Described signal amplification circuit is used for signal to amplify, and produces reference signal; Input end input reference signal and the input signal respectively of described signal comparator circuit, and generate control signal; Described control signal inputs the input end of described power driving circuit, and described power driving circuit is used for control signal to carry out power amplification and output drive signal, and described drive singal acts on electric-hydraulic proportion solenoid valve.The utility model can meet the manual operation function of hydraulic system, and adopt the mode of pure hardware circuit to drive Proportional valve, application is reliable, meets the demands, and eliminates the software development cost that Single-chip Controlling produces.
Description
Technical field
The utility model relates to hydraulic control system, particularly relates to a kind of proportional valve control system.
Background technique
Electric-hydraulic proportion solenoid valve (abbreviation Proportional valve) is widely used in the easy hydraulic system automatically controlled, and it can according to the pressure of liquid stream in the electric control signal continuous print of input, pro rata hydraulic control system and flow.
Electric control signal is often the duty cycle signals of adjustable pulse width, proportional electromagnetic valve electric-control method conventional is at present the comparison output function utilizing microcontroller timer, as shown in Figure 1, this control mode comprises single-chip microcomputer and peripheral circuit, power driving circuit, and in conjunction with microcontroller bsp driver output duty cycle signal, output signal passes through power driving circuit again, finally act on electric-hydraulic proportion solenoid valve, achieve to control the continuous control function that power drive chip realizes Proportional valve.
But, this proportional valve control mode is owing to using microcontroller, its basic peripheral circuit causes design cost high problem, and comprise development cost and the maintenance cost of microcontroller bsp driver, therefore, need a kind of do not use microcontroller but can realize export adjustable new proportional valve control system.
Model utility content
The technical problems to be solved in the utility model reduces peripheral circuit because the use of microcontroller causes, problem that program development cost is high, there is provided the duty cycle control signal that a kind of system output pulse width of pure circuit structure is adjustable, to realize the control system of the continuous control function of Proportional valve.
Proportional valve control system of the present utility model, comprises the signal generating circuit, signal amplification circuit, signal comparator circuit, the power driving circuit that are connected successively;
The output terminal of described power driving circuit connects electric-hydraulic proportion solenoid valve;
Described signal generating circuit is for generation of signal;
Described signal amplification circuit is used for signal to amplify, and produces reference signal;
Input end input reference signal and the input signal respectively of described signal comparator circuit, and generate control signal;
Described control signal inputs the input end of described power driving circuit, and described power driving circuit is used for control signal to carry out power amplification and output drive signal, and described drive singal acts on electric-hydraulic proportion solenoid valve.
It is 5V that described signal generating circuit generates trough value, and crest value is the triangular signal of 10V;
Described triangular signal amplifies by described signal amplification circuit, and generating trough value is 0V, and crest value is the triangular signal of 15V, as reference signal;
The control signal that described signal comparator circuit exports is the square wave control signal with certain dutycycle.
Signal generating circuit is made up of timing chip, resistance and electric capacity, and timing chip adopts SA555 chip, and its pin 8 connects+15V power supply; Pin 1 connects power supply ground; Resistance R1 mono-termination timing chip pin 4, the other end connecting resistance R7 one end; The other end of resistance R7 connects timing chip pin 7 and resistance R8 one end respectively; The other end of resistance R8 connects pin 6 and electric capacity C4 one end of timing chip respectively; The other end ground connection of electric capacity C4; The one termination timing chip pin 5 of electric capacity C9, the other end ground connection; Same one end of pin 2, the 6 contact resistance R5 of timing chip, the in-phase input end of operational amplifier D2B in the other end connection signal amplification circuit of resistance R5.
Signal amplification circuit is made up of two-way operational amplifier, resistance and electric capacity, two-way operational amplifier adopts the OP727 chip comprising operational amplifier D2A and operational amplifier D2B, its pin 3 contact resistance R3 one end, one end of the other end difference contact resistance R13 and resistance R2 of resistance R3, another termination of resistance R13+15V power supply, the other end ground connection of resistance R2; The pin 4 of described two-way operational amplifier D2 connects one end of-15V power supply and shunt capacitance C11, shunt capacitance C11 the other end ground connection respectively; Pin 5 connecting resistance R5; Pin 6 is connected with pin 1 by current-limiting resistance R6; Pin 7 exports control signal, and connects pin 6 by resistance R15; Pin 8 connects one end of+15V power supply and shunt capacitance C10 respectively, the other end ground connection of shunt capacitance C10; Pin 1 is connected with pin 2 by resistance R4, ground connection after pin 2 series resistors R14.
Signal comparator circuit is made up of comparator D3, resistance and electric capacity, and comparator D3 adopts LM193 model, and its pin 1 connects power driving circuit 4 by resistance R9, and pin 1 is also connected with pin 4 by resistance R24, and pin 1 is also connected with pin 8 by resistance R20;
Pin 8 connects one end of+15V power supply and electric capacity C12 respectively, the other end ground connection of shunt capacitance C12, and pin 4 connects power supply ground, and pin 3 connects input signal, and pin 2 connects the pin 7 of two-way operational amplifier.
Power driving circuit is made up of power drive chip D4, resistance and diode, and power drive chip D4 adopts BTS432E2 chip, and its pin 3 connects+24V power supply; The pin 1 of resistance R16 mono-termination power drive chip D4, another termination power ground; Current-limiting resistance R9 connects the pin 2 of power drive chip D4; The positive pole of anti-reverse diode V1 connects the pin 5 of power drive chip D4, and negative pole connects the negative pole and electric-hydraulic proportion solenoid valve that store stream diode V5 respectively; The positive pole storing stream diode V5 connects power supply ground.
The design of Proportional valve manual driving system of the present utility model can meet the manual operation function of hydraulic system, and realizes without the control mode (automatically controlling) of software.This design adopts the mode of pure hardware to drive Proportional valve, and application is reliable, meets the demands, and eliminates software development cycle and software development cost.
Accompanying drawing explanation
Fig. 1 is that existing electro-hydraulic proportional valve controls principle schematic;
Fig. 2 is proportional valve control system flow chart of the present utility model;
Fig. 3 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
As shown in Figure 2, the proportional valve control system of the present embodiment comprises the signal generating circuit 1, signal amplification circuit 2, signal comparator circuit 3, the power driving circuit 4 that are connected successively, and the output terminal of power driving circuit 4 connects electric-hydraulic proportion solenoid valve.
Signal generating circuit 1 is for generation of signal.This signal is generally the periodic signal meeting control cycle needs.
Signal amplification circuit 2, for being amplified by signal (or figure signal amplitude is interval) simultaneously, produces reference signal.
Input end input reference signal and the input signal respectively of signal comparator circuit 3, and generate control signal.The Changing Pattern of input signal is usually corresponding to the state of a control needed.
The input end of above-mentioned control signal input power drive circuit 4, power driving circuit 4 is for carrying out power amplification and output drive signal by control signal, and this drive singal acts on electric-hydraulic proportion solenoid valve.
In working procedure, it is 5V that signal generating circuit 1 generates trough value, and crest value is the triangular signal of 10V.
Above-mentioned triangular signal amplifies by signal amplification circuit 2, and generating trough value is 0V, and crest value is the triangular signal of 15V, as reference signal.
Signal comparator circuit 3 exports the square wave control signal with certain dutycycle.
As shown in Figure 3, in the proportional valve control system of the present embodiment, signal generating circuit 1 is made up of timing chip D1, resistance and electric capacity.
Timing chip D1 adopts SA555 chip, and its pin 8 connects+15V power supply; Pin 1 connects power supply ground; Resistance R1 mono-termination timing chip D1 pin 4, the other end connecting resistance R7 one end; The other end of resistance R7 connects timing chip D1 pin 7 and resistance R8 one end respectively; The other end of resistance R8 connects pin 6 and electric capacity C4 one end of timing chip D1 respectively; The other end ground connection of electric capacity C4; The one termination timing chip D1 pin 5 of electric capacity C9, the other end ground connection; Same one end of pin 2, the 6 contact resistance R5 of timing chip D1, the in-phase input end of operational amplifier D2B in the other end connection signal amplification circuit of resistance R5.
Signal amplification circuit 2 is made up of two-way operational amplifier, resistance and electric capacity.
Two-way operational amplifier adopts the OP727 chip comprising operational amplifier D2A and operational amplifier D2B, its pin 3 contact resistance R3 one end, one end of the other end difference contact resistance R13 and resistance R2 of resistance R3, another termination of resistance R13+15V power supply, the other end ground connection of resistance R2; The pin 4 of described two-way operational amplifier D2 connects one end of-15V power supply and shunt capacitance C11, shunt capacitance C11 the other end ground connection respectively; Pin 5 connecting resistance R5; Pin 6 is connected with pin 1 by current-limiting resistance R6; Pin 7 exports control signal, and connects pin 6 by resistance R15; Pin 8 connects one end of+15V power supply and shunt capacitance C10 respectively, the other end ground connection of shunt capacitance C10; Pin 1 is connected with pin 2 by resistance R4, ground connection after pin 2 series resistors R14.
Signal comparator circuit 3 is made up of comparator D3, resistance and electric capacity.
Comparator D3 adopts LM193 model, and its pin 1 connects power driving circuit 4 by resistance R9, and pin 1 is also connected with pin 4 by resistance R24, and pin 1 is also connected with pin 8 by resistance R20;
Pin 8 connects one end of+15V power supply and electric capacity C12 respectively, the other end ground connection of shunt capacitance C12, and pin 4 connects power supply ground, and pin 3 connects input signal, and pin 2 connects the pin 7 of two-way operational amplifier.
Power driving circuit 4 is made up of power drive chip D4, resistance and diode.
Power drive chip D4 adopts BTS432E2 chip, and its pin 3 connects+24V power supply; The pin 1 of resistance R16 mono-termination power drive chip D4, another termination power ground; Current-limiting resistance R9 connects the pin 2 of power drive chip D4; The positive pole of anti-reverse diode V1 connects the pin 5 of power drive chip D4, and negative pole connects the negative pole and electric-hydraulic proportion solenoid valve that store stream diode V5 respectively; The positive pole storing stream diode V5 connects power supply ground.
Working principle:
Signal generating circuit 1 exports triangular signal V1 by the pin 6 of timing chip SA555, trough value is 5V, crest value is 10V, and after resistance R5 current limliting, be input to the pin of input end in the same way 5 (the inverting input pin 4 also initial triangular signal V1 of operational amplifier D2B) of operational amplifier D2B.。
Signal amplification circuit 2 is that triangular signal V1 is formed reference signal VREF through amplifying process, and concrete computational process is as follows:
(1)+15V voltage is after resistance R2 and R13 dividing potential drop, produce the burning voltage of+5V and carry out after current limliting through resistance R3, being input to the pin of input end in the same way 3 (the reverse input end pin 2 of operational amplifier D2A is also initially+5V) of operational amplifier D2A;
(2) electric current I=5 ÷ (19 × 10^3) flowing through resistance R14 can be calculated from above, therefore can draw voltage V2=5+I × (10 × 10^3) of D2A pin 1;
(3) voltage signal of associative operation amplifier D2B pin 6, can draw partial pressure value V3=I1 × (19 × 10^3) at resistance R15 two ends;
(4) reference signal VREF=V3+V1=(29 ÷ 10) × (V1-5) of signal amplification circuit output.
Signal comparator circuit 3 is that two input terminal voltages compare by comparator D3 (LM193), and exports square signal.As input signal Vin>VREF, export high level VH (VH≤5V); As input signal Vin<VREF, output low level VL (VL >=0V); As input signal Vin=VREF, output voltage is zero.Therefore, dutycycle PWM=Vin/VREF_MAX × 100% of square signal is exported, wherein PWMMAX=100%, PWMMin=0%.Therefore, along with the change of input voltage vin, duty cycle square wave also changes accordingly.
The control signal of power driving circuit 4 from the square signal of signal comparator circuit 3, control signal after resistance R9 current limliting, ingoing power driving chip D4 (BTS432E2), driving current Iout>2A.The drive singal of corresponding dutycycle is exported, for driving Proportional valve by power drive chip D4.Wherein, diode V1 is anti-reverse diode, and diode V5 is for storing stream diode.
Above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that the common engineers and technicians in related domain make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.
Claims (6)
1. a proportional valve control system, is characterized in that, comprises the signal generating circuit (1), signal amplification circuit (2), signal comparator circuit (3), the power driving circuit (4) that are connected successively;
The output terminal of described power driving circuit (4) connects electric-hydraulic proportion solenoid valve;
Described signal generating circuit (1) is for generation of signal;
Described signal amplification circuit (2), for being amplified by signal, produces reference signal;
Input end input reference signal and the input signal respectively of described signal comparator circuit (3), and generate control signal;
Described control signal inputs the input end of described power driving circuit (4), and described power driving circuit (4) is for carrying out power amplification and output drive signal by control signal, and described drive singal acts on electric-hydraulic proportion solenoid valve.
2. proportional valve control system according to claim 1, is characterized in that,
It is 5V that described signal generating circuit (1) generates trough value, and crest value is the triangular signal of 10V;
Described triangular signal amplifies by described signal amplification circuit (2), and generating trough value is 0V, and crest value is the triangular signal of 15V, as reference signal;
The control signal that described signal comparator circuit (3) exports is the square wave control signal with certain dutycycle.
3. proportional valve control system according to claim 2, it is characterized in that, signal generating circuit (1) is made up of timing chip (D1), resistance and electric capacity, and timing chip (D1) adopts SA555 chip, and its pin 8 connects+15V power supply; Pin 1 connects power supply ground; Resistance R1 mono-termination timing chip (D1) pin 4, the other end connecting resistance R7 one end; The other end of resistance R7 connects timing chip (D1) pin 7 and resistance R8 one end respectively; The other end of resistance R8 connects pin 6 and electric capacity C4 one end of timing chip (D1) respectively; The other end ground connection of electric capacity C4; One termination timing chip (D1) pin 5 of electric capacity C9, the other end ground connection; Same one end of pin 2, the 6 contact resistance R5 of timing chip (D1), the in-phase input end of operational amplifier D2B in the other end connection signal amplification circuit of resistance R5.
4. proportional valve control system according to claim 2, it is characterized in that, signal amplification circuit (2) is made up of two-way operational amplifier, resistance and electric capacity, two-way operational amplifier adopts the OP727 chip comprising operational amplifier D2A and operational amplifier D2B, its pin 3 contact resistance R3 one end, one end of the other end difference contact resistance R13 and resistance R2 of resistance R3, another termination of resistance R13+15V power supply, the other end ground connection of resistance R2; The pin 4 of described two-way operational amplifier D2 connects one end of-15V power supply and shunt capacitance C11, shunt capacitance C11 the other end ground connection respectively; Pin 5 connecting resistance R5; Pin 6 is connected with pin 1 by current-limiting resistance R6; Pin 7 exports control signal, and connects pin 6 by resistance R15; Pin 8 connects one end of+15V power supply and shunt capacitance C10 respectively, the other end ground connection of shunt capacitance C10; Pin 1 is connected with pin 2 by resistance R4, ground connection after pin 2 series resistors R14.
5. proportional valve control system according to claim 2, it is characterized in that, signal comparator circuit (3) is made up of comparator D3, resistance and electric capacity, comparator D3 adopts LM193 model, its pin 1 connects power driving circuit 4 by resistance R9, pin 1 is also connected with pin 4 by resistance R24, and pin 1 is also connected with pin 8 by resistance R20;
Pin 8 connects one end of+15V power supply and electric capacity C12 respectively, the other end ground connection of shunt capacitance C12, and pin 4 connects power supply ground, and pin 3 connects input signal, and pin 2 connects the pin 7 of two-way operational amplifier.
6. proportional valve control system according to claim 2, is characterized in that, power driving circuit (4) is made up of power drive chip D4, resistance and diode, and power drive chip D4 adopts BTS432E2 chip, and its pin 3 connects+24V power supply; The pin 1 of resistance R16 mono-termination power drive chip D4, another termination power ground; Current-limiting resistance R9 connects the pin 2 of power drive chip D4; The positive pole of anti-reverse diode V1 connects the pin 5 of power drive chip D4, and negative pole connects the negative pole and electric-hydraulic proportion solenoid valve that store stream diode V5 respectively; The positive pole storing stream diode V5 connects power supply ground.
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| CN201420357787.2U CN204042130U (en) | 2014-06-30 | 2014-06-30 | A kind of proportional valve control system |
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| CN201420357787.2U CN204042130U (en) | 2014-06-30 | 2014-06-30 | A kind of proportional valve control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105278412A (en) * | 2015-10-30 | 2016-01-27 | 青岛海尔科技有限公司 | Gas stove stepless fire adjustment control method, device and gas stove |
| CN105822808A (en) * | 2016-05-19 | 2016-08-03 | 浙江自力机械有限公司 | Diversion valve drive circuit of water-jet loom |
| CN110005532A (en) * | 2019-03-18 | 2019-07-12 | 哈尔滨工程大学 | A kind of driving circuit of diesel engine position control formula actuator |
| CN111336212A (en) * | 2018-12-19 | 2020-06-26 | 财团法人金属工业研究发展中心 | Suspension system |
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2014
- 2014-06-30 CN CN201420357787.2U patent/CN204042130U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278412A (en) * | 2015-10-30 | 2016-01-27 | 青岛海尔科技有限公司 | Gas stove stepless fire adjustment control method, device and gas stove |
| CN105278412B (en) * | 2015-10-30 | 2019-05-17 | 青岛海尔科技有限公司 | Control method, device and the gas-cooker of a kind of pair of stepless fire tuning of gas-cooker |
| CN105822808A (en) * | 2016-05-19 | 2016-08-03 | 浙江自力机械有限公司 | Diversion valve drive circuit of water-jet loom |
| CN105822808B (en) * | 2016-05-19 | 2018-12-07 | 浙江自力机械有限公司 | A kind of water-jet loom steering valve-driving circuit |
| CN111336212A (en) * | 2018-12-19 | 2020-06-26 | 财团法人金属工业研究发展中心 | Suspension system |
| CN110005532A (en) * | 2019-03-18 | 2019-07-12 | 哈尔滨工程大学 | A kind of driving circuit of diesel engine position control formula actuator |
| CN110005532B (en) * | 2019-03-18 | 2021-10-26 | 哈尔滨工程大学 | Driving circuit of diesel engine position control type actuator |
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