CN102591372A - Distribution pressure control circuit - Google Patents

Distribution pressure control circuit Download PDF

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Publication number
CN102591372A
CN102591372A CN2012100319588A CN201210031958A CN102591372A CN 102591372 A CN102591372 A CN 102591372A CN 2012100319588 A CN2012100319588 A CN 2012100319588A CN 201210031958 A CN201210031958 A CN 201210031958A CN 102591372 A CN102591372 A CN 102591372A
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signal
pressure
connect
value signal
diode
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CN2012100319588A
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CN102591372B (en
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屈百达
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Jiangxi Yutai electric complete set Co., Ltd.
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Jiangnan University
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Abstract

The invention relates to a distribution pressure control circuit which adopts a pressure control switch-servo valve control mode. Airbags at different parts of a controlled object are subjected to inflating and deflating constant-pressure deformation control by utilizing a pressure signal sensed by pressure and a given signal through a control system formed by signal comparison, amplification, treatment, conversion, driving and amplification, and implementation. The control circuit consists of a pressure signal processing control circuit, a servo valve driving circuit, a pressure pump control implementing circuit and a working power supply circuit, and a municipal power supply is introduced by a power line.

Description

A kind of distribution pressure control circuit
Technical field
The present invention relates to a kind of control circuit---a kind of given Adaptive Control circuit of distribution pressure.
Background technology
Control circuit is general research and development, design, the production objects in field such as industry, modern agriculture, life, scientific research; Pressure control circuit wherein then is one type and directly applies to the functional power type system that relates to the control of pressure or pressure, regulates, or the control of this type systematic, drive system.Yet using at some, in the application of special life at home, is not that existing pressure control circuit just can directly be used, particularly in the exigent product of cost performance.Therefore, design, a kind of high performance-price ratio pressure control circuit that is applicable to home environment of research and development just become a problem demanding prompt solution.In the application demand of many houses life; One series products is arranged, like automatic distortion mattress, automatic Variable sofa, automatic Distortion pillow etc., need be under given appropriate degree; Different parts to controlled device carries out automatic and synchronous pressure variation control, promptly so-called distribution pressure control.The distribution pressure control circuit proposes for satisfying this demand.
Summary of the invention
For realizing a kind of control of distribution pressure, the present invention provides a kind of distribution pressure control circuit.It adopts votage control switch-servo-valve control mode; Utilize the pressure signal and the given signal of pressure perception; Through amplifying, carry out the control system that link is formed by signal comparison, amplification, processing, conversion, driving, to the controlled device different at different position and different air bag constant voltage Deformation control of filling, exit.Control circuit is made up of pressure signal control and treatment circuit, driving circuit of servo valve, force (forcing) pump control executive circuit and working power circuit, introduces mains supply through power lead.
The technical solution adopted for the present invention to solve the technical problems is:
With votage control switch-servo-valve control mode; Utilize the pressure signal and the given signal of pressure perception; Through amplifying, carry out the control system that link is formed by signal comparison, amplification, processing, conversion, driving, to a plurality of different bladder of controlled device constant voltage Deformation control of filling, exit.The distribution pressure control circuit that constitutes control pressurer system is assemblied in the control enclosure, includes circuit tie lines device, pressure transducer, electrical servo valve and force (forcing) pump.Circuit tie lines in the control enclosure is made up of pressure signal control and treatment circuit, driving circuit of servo valve, force (forcing) pump control executive circuit and working power circuit.In control enclosure, the valve front cabinet inner segment of the corresponding tracheae in each position is separately installed with the corresponding pressure sensor; The corresponding electrical servo valve in each position is communicated with high-voltage tube through the valve back segment of corresponding tracheae respectively, and high-voltage tube is communicated with the high pressure delivery outlet of force (forcing) pump; The low pressure delivery outlet of force (forcing) pump is communicated with low-voltage tube; Between high-voltage tube and low-voltage tube, there is the safety valve parallel connection to connect.
The pressure signal of each pressure transducer is incorporated into each pressure signal amplification, processing unit through each pressure sensor signal end, after amplifying, handling, forms the low value signal of each pressure and exports with each pressure high-value signal.
Each pressure signal amplifies, processing unit is formed by comparison, computing, amplifying circuit and optocoupler separation circuit.
At each pressure signal amplification, processing unit, the pressure sensor signal end is connected to the positive input of operational amplifier; The input end of the output terminal of operational amplifier through separating threshold potential device and drop-down optocoupler with on carry optocoupler input end be connected, more respectively with drop-down optocoupler and on carry the output terminal formation pressure low value signal end and the pressure high-value signal end of optocoupler.
The low value signal of each pressure is incorporated into each electrical servo valve driver element with the pressure high-value signal through each pressure low value signal end and pressure high-value signal end, treated, amplify after, form preceding electrical servo valve drive signal and export.
Each electrical servo valve driver element by or door treatment circuit and operational amplification circuit composition.
In each electrical servo valve driver element; Pressure low value signal end is connected with two diode cathodes of formation or door respectively with pressure high-value signal end; The anodal of two diodes all is connected with the inverting input of operational amplifier, and the output terminal of operational amplifier is promptly as electrical servo valve drive signal end.
The low value signal of each pressure is incorporated into relay drive unit through corresponding pressure low value signal end respectively, treated, amplify after, form relay drive signal, drive the solid-state relay action.
Relay drive unit by or door treatment circuit and operational amplification circuit form.Each pressure low value signal end connects with the corresponding diode cathode of formation or door respectively; The anodal of each diode all is connected with the inverting input of operational amplifier; The output terminal of operational amplifier is connected with the relay drive signal end of solid-state relay, and the relay normally open contact of solid-state relay is promptly carried out switch as the power supply of force (forcing) pump motor.
The invention has the beneficial effects as follows: control circuit only need be given through adjustment; Just can be based on the pressurized distribution situation on controlled device surface; Automatically produce the corresponding electrical servo valve drive signal in each position, pressure release driving signal and pressurization pump drive signal; And then cooperate through the action of the corresponding electrical servo valve in each position, relief valve and force (forcing) pump, realize to the controlled device surface automatically on demand the adjustment height, change shape based on controlled device surface pressurized distribution situation.In addition,, can produce in batches in adjustment because Circuits System is clean and tidy, simple in structure with multi-form.
Description of drawings
Below in conjunction with three site pressure control embodiment shown in the drawings the present invention is further specified.
Fig. 1 is three site distribution pressure atmospheric control structural drawing of the present invention.
Fig. 2 is the distribution pressure control system circuit interconnect pattern of present embodiment.
Fig. 3 is the distribution pressure control circuit structural drawing of present embodiment.
Fig. 4 is the force (forcing) pump control executive circuit structural drawing of present embodiment control system.
Fig. 5 is the working power circuit structural drawing of present embodiment control system.
In Fig. 1～5: air bag before the 1.1., air bag among the 1.2., tracheae before the 1.3. rear gasbag, 2.1., tracheae among the 2.2.; 2.3. pressure transducer before the back tracheae, 3.1., pressure transducer among the 3.2., electrical servo valve before the pressure transducer behind the 3.3., 4.1.; 4.2. middle electrical servo valve, electrical servo valve behind the 4.3., 5. pressure release electrical servo valve, 6. low-voltage tube; 7. high-voltage tube, 8. safety valve, 9. force (forcing) pump, M is a motor; v xBe pressure release drive signal end, g is the signal ground end, E eFor carrying out power positive end, v 1Be preceding electrical servo valve drive signal end, v 2Be middle electrical servo valve drive signal end, v 3Be back electrical servo valve drive signal end, s 1Be preceding pressure sensor signal end, s 2Be middle pressure sensor signal end, s 3Be back pressure sensor signal end.
In Fig. 2～5: 10. power switch, 11. appropriate degree regulators, r G1For preceding appropriate degree is regulated given side, r G2For middle appropriate degree is regulated given side, r G3For the back appropriate degree is regulated the given side, SC1 is that preceding pressure signal amplifies, processing unit, and SC2 is that middle pressure signal amplifies, processing unit, and SC3 is that the back pressure signal amplifies, processing unit, a 1Be preceding pressure low value signal end, b 1Be preceding pressure high-value signal end, a 2Be middle pressure low value signal end, b 2Be middle pressure high-value signal end, a 3Be back pressure low value signal end, b 3Be back pressure high-value signal end, VD1 is preceding electrical servo valve driver element, and VD2 is middle electrical servo valve driver element, and VD3 is a back electrical servo valve driver element, and JDr is a relay drive unit, p eFor relay drives current limliting end, p oBe the relay drive signal end, J is a solid-state relay, and J-1 is a relay normally open contact, and UPS is the working power converter unit, and m, n are the mains electricity input end.
In Fig. 3: R 11Be front signal divider resistance, R P1Be the equivalent resistance of preceding pressure transducer 3.1, R 12Be the preceding first working point divider resistance, R 13Be the preceding potentiometer of appropriate degree regulator 11, E sBe signal Processing power positive end, A 11Be first operational amplifier, LC 11Be preceding drop-down optocoupler, G 1Be preceding separation threshold potential device, LC 12Carry optocoupler on preceding, TVS 1Be preceding threshold value tunnel diode, D 11Be the preceding or family status one diode, D 12Be the preceding or family status two diodes, R 14For preceding or the student draw resistance, R 15Be divider resistance on preceding second working point, R 16Be divider resistance under preceding second working point, A 12Be second operational amplifier, D 13Be preceding fly-wheel diode; R 21Be middle signal divider resistance, R P2Be the equivalent resistance of middle pressure transducer 3.2, R 22For in the first working point divider resistance, R 23Be the middle potentiometer of appropriate degree regulator 11, A 21Be the 3rd operational amplifier, LC 21For in drop-down optocoupler, G 2Be middle separation threshold potential device, LC 22For on carry optocoupler, TVS 2Be middle threshold value tunnel diode, D 21For in or the family status one diode, D 22For in or the family status two diodes, R 24For in or the student draw resistance, R 25For in divider resistance on second working point, R 26For in divider resistance under second working point, A 22Be four-operational amplifier, D 23Be middle fly-wheel diode; R 31Be back signal divider resistance, R P3Be the equivalent resistance of back pressure transducer 3.3, R 32Be the back first working point divider resistance, R 33Be the back potentiometer of appropriate degree regulator 11, A 31Be the 5th operational amplifier, LC 31Be the drop-down optocoupler in back, G 3For separating threshold potential device, LC in the back 32For carrying optocoupler, TVS on the back 3Be back threshold value tunnel diode, D 31Be back or the family status one diode, D 32Be back or the family status two diodes, R 34For back or the student draw resistance, R 35Be divider resistance on second working point, back, R 36Be divider resistance under second working point, back, A 32Be the 6th operational amplifier, D 33Be the subsequent flows diode.
In Fig. 4: D E1For driving or the family status one diode D E2For driving or the family status two diodes R E3Be divider resistance on the drive signal, R E4Be divider resistance under the drive signal, R E5For driving divider resistance on the working point, R E6For driving divider resistance under the working point, A E2For driving operational amplifier, R JFor relay drives current-limiting resistance, D JBe isolating diode, D vBe the blowdown valve fly-wheel diode.
In Fig. 5: K is the power switch contact, B rBe rectifier bridge, C 3Be first filter capacitor, C 2Be oscillator filter capacitor, C 4For absorbing electric capacity, R 4Be absorbing resistor, D 3Be absorption diode, U 1Be PWM controller chip, C 5Be second filter capacitor, C 5Be second filter capacitor, C 6Be buffer capacitor, R 5Be divider resistance, LC FBe the feedback optocoupler, Tr is an output transformer, R 6Be current-limiting resistance, D 6Be commutation diode, D 4For carrying out power rectifier diode, C 7For carrying out power supply first filter capacitor, L 3For carrying out power filter inductance, C 8For carrying out power supply second filter capacitor, D 5Be signal Processing power rectifier diode, C 9Be signal Processing power supply first filter capacitor, L 4Be signal Processing power filter inductance, C 10For carrying out power supply second filter capacitor, R 7Be feedback current-limiting resistance, R 8Be feedback dividing potential drop first resistance, C 11For self-excitation absorbs electric capacity, U 2Be reference voltage source device, R 9Be feedback dividing potential drop second resistance.
Embodiment
In atmospheric control structural drawing of the present invention shown in Figure 1: preceding air bag 1.1, middle air bag 1.2, rear gasbag 1.3 are respectively through preceding electrical servo valve 4.1, middle electrical servo valve 4.2 in preceding tracheae 2.1, middle tracheae 2.2, back tracheae 2.3 and the control enclosure, afterwards electrical servo valve 4.3 communicates; Be equipped with circuit tie lines, preceding pressure transducer 3.1, middle pressure transducer 3.2, back pressure transducer 3.3, preceding electrical servo valve 4.1, middle electrical servo valve 4.2, back electrical servo valve 4.3 in the control enclosure, force (forcing) pump 9 and pressure release electrical servo valve 5.In control enclosure, pressure transducer 3.1, middle pressure transducer 3.2, back pressure transducer 3.3 before the valve front cabinet inner segment of preceding tracheae 2.1, middle tracheae 2.1 and back tracheae 2.3 is separately installed with; Pressure release electrical servo valve 5 is with pressure release drive signal end v xWith signal ground end g as driving input end, preceding electrical servo valve 4.1 is to carry out power positive end E eWith preceding electrical servo valve drive signal end v 1Drive input end as pressure release, middle electrical servo valve 4.2 is to carry out power positive end E eWith middle electrical servo valve drive signal end v 2Drive input end as pressure release, back electrical servo valve 4.3 is to carry out power positive end E eWith back electrical servo valve drive signal end v 3As driving input end; Pressure sensor signal end s before the preceding pressure transducer 3.1 1With signal ground end g as the pressure signal output terminal, middle pressure transducer 3.2 is with middle pressure sensor signal end s 2With signal ground end g as the pressure signal output terminal, pressure sensor signal end s after the back pressure transducer 3.3 3With signal ground end g as the pressure signal output terminal; Before electrical servo valve 4.1, middle electrical servo valve 4.2, back electrical servo valve 4.3 respectively be communicated with high-voltage tube 7 through the valve back segment of preceding tracheae 2.1, middle tracheae 2.2, back tracheae 2.3, high-voltage tube 7 is communicated with the high pressure delivery outlet of force (forcing) pump 9.At preceding tracheae 2.1, tracheae 2.3 valve back segments the place that is communicated with high-voltage tube 7, be communicated with a relief tube again, this relief tube through pressure release electrical servo valve 5 be divided into controlled section with the emptying section.The low pressure delivery outlet of force (forcing) pump 9 is communicated with low-voltage tube 6, and the other end of low-voltage tube 6 is connected to air strainer; At the nearly equipped at outlet port of force (forcing) pump 9, between high-voltage tube 7 and the low-voltage tube 6, high-voltage tube 7 is passed through couplet mutually with low-voltage tube 6 by safety valve 8, when overvoltage to take place in order to, from high-voltage tube 7 to low-voltage tube 6 pressure releases.
In three site distribution pressure atmospheric control structural drawing shown in Figure 1 and distribution pressure control system circuit interconnect pattern shown in Figure 2: the circuit tie lines in the control enclosure is made up of pressure signal control and treatment circuit, driving circuit of servo valve, force (forcing) pump control executive circuit and working power circuit, through power lead introducing mains supply.The pressure signal control and treatment circuit comprises that preceding pressure signal amplification, processing unit SC1, the amplification of middle pressure signal, processing unit SC2 and back pressure signal amplify, processing unit SC3; Driving circuit of servo valve comprises preceding electrical servo valve driver element VD1, middle electrical servo valve driver element VD2 and back electrical servo valve driver element VD3; Force (forcing) pump control executive circuit comprises the motor M of relay drive unit JDr, solid-state relay J and force (forcing) pump 9, and working power circuit comprises working power converter unit UPS and power switch 10.Preceding pressure transducer 3.1 is through preceding pressure sensor signal end s 1Amplify with preceding pressure signal with signal ground end g, processing unit SC1 is connected, middle pressure transducer 3.2 is through middle pressure sensor signal end s 2Amplify with middle pressure signal with signal ground end g, processing unit SC2 is connected, back pressure transducer 3.3 is through back pressure sensor signal end s 3Be connected with back pressure signal amplification, processing unit SC3 with signal ground end g; Coaxial three potentiometers are that the preceding potentiometer swing arm end and zero resistance of appropriate degree regulator 11 holds the preceding appropriate degree that all is connected to preceding pressure signal amplification, processing unit SC1 to regulate given side r G1, coaxial three potentiometers are that the middle potentiometer swing arm end and zero resistance of appropriate degree regulator 11 holds the middle appropriate degree that all is connected to middle pressure signal amplification, processing unit SC2 to regulate given side r G2, coaxial three potentiometers are that the back potentiometer swing arm end and zero resistance of appropriate degree regulator 11 holds the back appropriate degree that all is connected to back pressure signal amplification, processing unit SC3 to regulate given side r G3, coaxial three potentiometers are that the high resistant end that respectively joins of appropriate degree regulator 11 all is connected to signal ground end g; Preceding pressure signal amplifies, processing unit SC1 passes through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Be connected with preceding electrical servo valve driver element VD1; Middle pressure signal amplifies, processing unit SC2 passes through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Be connected with middle electrical servo valve driver element VD2; Back pressure signal amplifies, processing unit SC3 passes through back pressure low value signal end a 3With back pressure high-value signal end b 3Electrical servo valve driver element VD3 is connected with the back; Simultaneously, preceding pressure signal amplification, processing unit SC1 are through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1, middle pressure signal amplifies, processing unit SC2 passes through middle pressure low value signal end a 2With middle pressure high-value signal end b 2, back pressure signal amplifies, processing unit SC3 passes through back pressure low value signal end a 3With back pressure high-value signal end b 3, all be connected to relay drive unit JDr; The solenoid of preceding electrical servo valve 4.1 is through preceding electrical servo valve drive signal end v 1With execution power positive end E eBe connected with preceding electrical servo valve driver element VD1, the solenoid of middle electrical servo valve 4.2 is through middle electrical servo valve drive signal end v 2With execution power positive end E eBe connected with middle electrical servo valve driver element VD2, the solenoid of back electrical servo valve 4.3 is through back electrical servo valve drive signal end v 3With execution power positive end E eElectrical servo valve driver element VD3 is connected with the back; The solenoid of pressure release electrical servo valve 5 is through pressure release drive signal end v xBe connected with relay drive unit JDr with signal ground end g; Relay drive unit JDr drives current limliting end p through relay eWith relay drive signal end p oJ is connected with solid-state relay; The relay normally open contact J-1 of solid-state relay J and the motor M of force (forcing) pump 9 are in series, and this series arm is connected across between two output contacts of power switch 10; Between two output contacts that the two mains electricity input end m of working power converter unit UPS, n are connected across power switch 10.
The pressure signal of preceding pressure transducer 3.1 is through preceding pressure sensor signal end s 1Pressure signal amplification, processing unit SC1 before being incorporated into, after amplifying, handling, pressure hangs down value signal and preceding pressure high-value signal before forming, through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Output.The pressure signal of middle pressure transducer 3.2 is through middle pressure sensor signal end s 2Pressure signal amplification, processing unit SC2 in being incorporated into, after amplifying, handling, low value signal of pressure and middle pressure high-value signal in the formation are through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Output.The pressure signal of back pressure transducer 3.3 is through back pressure sensor signal end v 3Be incorporated into back pressure signal amplification, processing unit SC3, after amplifying, handling, form back pressure and hang down value signal and back pressure high-value signal, through back pressure low value signal end a 3With back pressure high-value signal end b 3Output.
Preceding pressure signal amplification, processing unit SC1, the amplification of middle pressure signal, processing unit SC2 and back pressure signal amplify, processing unit SC3 forms by comparison, computing, amplifying circuit and optocoupler separation circuit.
In preceding pressure signal amplification, processing unit SC1, preceding pressure sensor signal end s 1Be connected to first operational amplifier A 11Positive input; First operational amplifier A 11Output terminal through preceding separation threshold potential device G 1With preceding drop-down optocoupler LC 11Input end and on carry optocoupler LC 12Input end connect, more respectively before drop-down optocoupler LC 11With on carry optocoupler LC 12Output terminal constitute before pressure low value signal end a 1With preceding pressure high-value signal end b 1In middle pressure signal amplification, processing unit SC2, middle pressure sensor signal end s 2Be connected to the 3rd operational amplifier A 21Positive input; The 3rd operational amplifier A 21Output terminal through middle separation threshold potential device G 2With in drop-down optocoupler LC 21Input end with on carry optocoupler LC 22Input end connect, more respectively with in drop-down optocoupler LC 21With on carry optocoupler LC 22Output terminal constitute in pressure low value signal end a 2With middle pressure high-value signal end b 2In back pressure signal amplification, processing unit SC3, back pressure sensor signal end v 3Be connected to the 5th operational amplifier A 31Positive input; The 5th operational amplifier A 31Output terminal through separating threshold potential device G 3With drop-down optocoupler LC 31Input end and on carry optocoupler LC 32Input end connect, more respectively with drop-down optocoupler LC 31With on carry optocoupler LC 32Output terminal constitute back pressure low value signal end a 3With back pressure high-value signal end b 3
Low value signal of preceding pressure and preceding pressure high-value signal are through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Electrical servo valve driver element VD1 before being incorporated into, treated, amplify after, electrical servo valve drive signal before forming is through preceding electrical servo valve drive signal end v 1Output.Low value signal of middle pressure and middle pressure high-value signal are through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Electrical servo valve driver element VD2 in being incorporated into, treated, amplify after, electrical servo valve drive signal in the formation is through middle electrical servo valve drive signal end v 2Output.The low value signal of back pressure passes through back pressure low value signal end a with back pressure high-value signal 3With back pressure high-value signal end b 3Be incorporated into back electrical servo valve driver element VD3, treated, amplify after, form back electrical servo valve drive signal, through back electrical servo valve drive signal end v 3Output.
Before electrical servo valve driver element VD1, middle electrical servo valve driver element VD2 and back electrical servo valve driver element VD3 by or door treatment circuit and operational amplification circuit form.
In preceding electrical servo valve driver element VD1, preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Low value signal diode with formation or door is preceding or the family status one diode D respectively 11Negative pole and the preceding or family status two diode D 12Negative pole connects, the preceding or family status one diode D 11Positive pole and the preceding or family status two diode D 12Anodal all with second operational amplifier A 12Inverting input connect second operational amplifier A 12Output terminal promptly as preceding electrical servo valve drive signal end v 1In middle electrical servo valve driver element VD2, middle pressure low value signal end a 2With middle pressure high-value signal end b 2Respectively with constitute or the low value signal diode of door promptly in or the family status one diode D 21Negative pole with in or the family status two diode D 22Negative pole connects, in or the family status one diode D 21Positive pole with in or the family status two diode D 22Anodal all with four-operational amplifier A 22Inverting input connect four-operational amplifier A 22Output terminal promptly as in electrical servo valve drive signal end v 2In the electrical servo valve driver element VD3 of back, back pressure low value signal end a 3With back pressure high-value signal end b 3Low value signal diode with formation or door is back or the family status one diode D respectively 31Negative pole and back or the family status two diode D 32Negative pole connects, back or the family status one diode D 31Positive pole with the back or the family status two diode D 32Anodal all with the 6th operational amplifier A 32Inverting input connect the 6th operational amplifier A 32Output terminal promptly as back electrical servo valve drive signal end v 3
The low value signal of preceding pressure, the low value signal of middle pressure and the low value signal of back pressure pass through preceding pressure low value signal end a respectively 1, middle pressure low value signal end a 2With back pressure low value signal end a 3Be incorporated into relay drive unit JDr, treated, amplify after, form relay drive signal, through relay drive signal end p oOutput to solid-state relay J control end, drive solid-state relay J action.
Relay drive unit JDr by or door treatment circuit and operational amplification circuit form.Preceding pressure low value signal end a 1, middle pressure low value signal end a 2With back pressure low value signal end a 3Respectively with constitute or the preceding diode D of door E1Negative pole, middle diode D E1Negative pole and back diode D E3Negative pole connects, preceding diode D E1Positive pole, middle diode D E1Positive pole and back diode D E3Anodal all with the driving operational amplifier A E2Inverting input connect, drive operational amplifier A E2Output terminal promptly as relay drive signal end p o, being connected with the control end of solid-state relay J, the relay normally open contact J-1 of solid-state relay J promptly carries out switch as the power supply of force (forcing) pump 9 motor M.
In the control circuit structural drawing of distribution pressure shown in Figure 3:
Front signal divider resistance R 11An end and signal Processing power positive end E sConnect the other end and first operational amplifier A 11In-phase input end connect; This homophase incoming junction is as preceding pressure sensor signal end s 1, the equivalent resistance R of pressure transducer 5.1 before being connected to P1An end, the equivalent resistance R of preceding pressure transducer 3.1 P1The other end be connected to signal ground end g; Signal ground end g ground connection.The preceding first working point divider resistance R 12An end and signal Processing power positive end E sConnect the other end and first operational amplifier A 11Inverting input connect; This anti-phase incoming junction is regulated given side r as preceding appropriate degree G1, be connected to 11 preceding potentiometer R 13Swing arm end and zero resistance end, the preceding potentiometer R of appropriate degree regulator 11 13The other end be connected to signal ground end g.First operational amplifier A 11Working power positive terminal and signal Processing power positive end E sConnect first operational amplifier A 11Earth terminal be connected with signal ground end g.Before drop-down optocoupler LC 11Input cathode be connected to signal Processing power positive end E s, preceding drop-down optocoupler LC 11Input anode with preceding separate threshold potential device G 1A quiet arm connect; Before drop-down optocoupler LC 11Negative pole of output end be connected to and carry out power positive end E e, preceding drop-down optocoupler LC 11Output head anode be connected to before pressure low value signal end a 1The preceding threshold potential device G that separates 1The swing arm and first operational amplifier A 11Output terminal connect; The preceding threshold potential device G that separates 1Another quiet arm and preceding on carry optocoupler LC 12Input cathode connect, carry optocoupler LC on preceding 12Input anode and preceding threshold value tunnel diode TVS 1Positive pole connect; Preceding threshold value tunnel diode TVS 1Negative pole be connected with signal ground end g; Carry optocoupler LC on preceding 12Negative pole of output end be connected to and carry out power positive end E e, carry optocoupler LC on preceding 12Output head anode be connected to before pressure high-value signal end b 1
Before or the family status one diode D 11Negative pole and the preceding or family status two diode D 12Negative pole be connected respectively to before pressure low value signal end a 1With preceding pressure high-value signal end b 1, the preceding or family status one diode D 11Positive pole and the preceding or family status two diode D 12Anodal all draw resistance R with preceding or the student 14An end connect, this tie point is connected to second operational amplifier A 12Inverting input; Preceding or the student draws resistance R 14An end ground connection.Divider resistance R on preceding second working point 15An end with carry out power positive end E eConnect; Divider resistance R on preceding second working point 15The other end and preceding second working point under divider resistance R 16An end connect this tie point and second operational amplifier A 12In-phase input end connect; Divider resistance R under preceding second working point 16Other end ground connection.Second operational amplifier A 12The working power positive terminal with carry out power positive end E eConnect second operational amplifier A 12Earth terminal ground connection.Preceding sustained diode 13Positive terminal with carry out power positive end E eConnect preceding sustained diode 13The positive terminal and second operational amplifier A 12Output terminal connect, this tie point is connected to preceding electrical servo valve drive signal end v 1
Middle signal divider resistance R 21An end and signal Processing power positive end E sConnect the other end and the 3rd operational amplifier A 21In-phase input end connect; Pressure sensor signal end s in this homophase incoming junction conduct 2, the equivalent resistance R of pressure transducer 3.2 in being connected to P2An end, the equivalent resistance R of middle pressure transducer 3.2 P2The other end be connected to signal ground end g; Signal ground end g ground connection.In the first working point divider resistance R 22An end and signal Processing power positive end E sConnect the other end and the 3rd operational amplifier A 21Inverting input connect; Appropriate degree is regulated given side r in this anti-phase incoming junction conduct G2, be connected to the middle potentiometer R of appropriate degree regulator 11 23Swing arm end and zero resistance end, the middle potentiometer R of appropriate degree regulator 11 23The other end be connected to signal ground end g.The 3rd operational amplifier A 21Working power positive terminal and signal Processing power positive end E sConnect the 3rd operational amplifier A 21Earth terminal be connected with signal ground end g.In drop-down optocoupler LC 21Input cathode be connected to signal Processing power positive end E s, in drop-down optocoupler LC 21Input anode with in separate threshold potential device G 2A quiet arm connect; In drop-down optocoupler LC 21Negative pole of output end be connected to and carry out power positive end E e, in drop-down optocoupler LC 21Output head anode be connected in pressure low value signal end a 2The middle threshold potential device G that separates 2Swing arm and the 3rd operational amplifier A 21Output terminal connect; The middle threshold potential device G that separates 2Another quiet arm with on carry optocoupler LC 22Input cathode connect, on carry optocoupler LC 22Input anode and middle threshold value tunnel diode TVS 2Positive pole connect; Middle threshold value tunnel diode TVS 2Negative pole be connected with signal ground end g; In on carry optocoupler LC 22Negative pole of output end be connected to and carry out power positive end E e, on carry optocoupler LC 22Output head anode be connected in pressure high-value signal end b 2
In or the family status one diode D 21Negative pole with in or the family status two diode D 22Negative pole be connected respectively in pressure low value signal end a 2With middle pressure high-value signal end b 2, in or the family status one diode D 21Positive pole with in or the family status two diode D 22Anodal all with in or the student draw resistance R 24An end connect, this tie point is connected to four-operational amplifier A 22Inverting input; In or the student draw resistance R 24An end ground connection.In divider resistance R on second working point 25An end with carry out power positive end E eConnect; In divider resistance R on second working point 25The other end with in divider resistance R under second working point 26An end connect this tie point and four-operational amplifier A 22In-phase input end connect; In divider resistance R under second working point 26Other end ground connection.Four-operational amplifier A 22The working power positive terminal with carry out power positive end E eConnect four-operational amplifier A 22Earth terminal ground connection.Middle sustained diode 23Positive terminal with carry out power positive end E eConnect middle sustained diode 23Positive terminal and four-operational amplifier A 22Output terminal connect, this tie point is connected to middle electrical servo valve drive signal end v 2
Back signal divider resistance R 31An end and signal Processing power positive end E sConnect the other end and the 5th operational amplifier A 31In-phase input end connect; This homophase incoming junction is as back pressure sensor signal end s 3, the equivalent resistance R of pressure transducer 3.3 after being connected to P3An end, the equivalent resistance R of back pressure transducer 3.3 P3The other end be connected to signal ground end g; Signal ground end g ground connection.The back first working point divider resistance R 32An end and signal Processing power positive end E sConnect the other end and the 5th operational amplifier A 31Inverting input connect; This anti-phase incoming junction is regulated given side r as the back appropriate degree G3, be connected to the back potentiometer R of appropriate degree regulator 11 33Swing arm end and zero resistance end, the back potentiometer R of appropriate degree regulator 11 33The other end be connected to signal ground end g.The 5th operational amplifier A 31Working power positive terminal and signal Processing power positive end E sConnect the 5th operational amplifier A 31Earth terminal be connected with signal ground end g.The drop-down optocoupler LC in back 31Input cathode be connected to signal Processing power positive end E s, the drop-down optocoupler LC in back 31Input anode with after separate threshold potential device G 3A quiet arm connect; The drop-down optocoupler LC in back 31Negative pole of output end be connected to and carry out power positive end E e, the drop-down optocoupler LC in back 31Output head anode be connected to back pressure low value signal end a 3Threshold potential device G is separated in the back 3Swing arm and the 5th operational amplifier A 31Output terminal connect; Threshold potential device G is separated in the back 3Another quiet arm with the back on carry optocoupler LC 32Input cathode connect, carry optocoupler LC on the back 32Input anode and back threshold value tunnel diode TVS 3Positive pole connect; Back threshold value tunnel diode TVS 3Negative pole be connected with signal ground end g; Carry optocoupler LC on the back 32Negative pole of output end be connected to and carry out power positive end E e, carry optocoupler LC on the back 32Output head anode be connected to back pressure high-value signal end b 3
Back or the family status one diode D 31Negative pole with the back or the family status two diode D 32Negative pole be connected respectively to back pressure low value signal end a 3With back pressure high-value signal end b 3, back or the family status one diode D 31Positive pole with the back or the family status two diode D 32Anodal all with afterwards or the student draw resistance R 34An end connect, this tie point is connected to the 6th operational amplifier A 32Inverting input; The back or the student draw resistance R 34An end ground connection.Divider resistance R on second working point, back 35An end with carry out power positive end E eConnect; Divider resistance R on second working point, back 35The other end with the back second working point under divider resistance R 36An end connect this tie point and the 6th operational amplifier A 32In-phase input end connect; Divider resistance R under second working point, back 36Other end ground connection.The 6th operational amplifier A 32The working power positive terminal with carry out power positive end E eConnect the 6th operational amplifier A 32Earth terminal ground connection.Subsequent flows diode D 33Positive terminal with carry out power positive end E eConnect subsequent flows diode D 33Positive terminal and the 6th operational amplifier A 32Output terminal connect, this tie point is connected to back electrical servo valve drive signal end v 3
In control system force (forcing) pump control executive circuit structural drawing shown in Figure 4: drive or the family status one diode D E1Negative pole, driving or the family status two diode D E2Negative pole and driving or the family status three diode D E3Negative pole be connected respectively to before pressure low value signal end a 1, middle pressure low value signal end a 2With back pressure low value signal end a 3, drive or the family status one diode D E1Positive pole, driving or the family status two diode D E2Positive pole and driving or the family status three diode D E3Anodal all with the driving operational amplifier A E2Inverting input connect; Divider resistance R on this anti-phase tie point and the drive signal E3An end and drive signal under divider resistance R E4An end connect; Divider resistance R on the drive signal E3The other end with carry out power positive end E eConnect; Divider resistance R under the drive signal E4Other end ground connection.Drive divider resistance R on the working point E5An end with drive divider resistance R under the working point E6An end all with drive operational amplifier A E2In-phase input end connect; Drive divider resistance R on the working point E5The other end with carry out power positive end E eConnect; Drive divider resistance R under the working point E6Other end ground connection.Drive operational amplifier A E2The working power positive terminal with carry out power positive end E eConnect, drive operational amplifier A E2Earth terminal ground connection.Relay drives current-limiting resistance R JAn end with carry out power positive end E eConnect, relay drives current-limiting resistance R JThe other end relay that is connected to solid-state relay J drive current limliting end p eIsolating diode D JNegative pole end with drive operational amplifier A E2Output terminal connect, this tie point is connected to the relay drive signal end p of solid-state relay J oIsolating diode D JNegative pole end and blowdown valve sustained diode vPositive pole connect, this tie point is as pressure release drive signal end v xThe blowdown valve sustained diode vMinus earth.
Control circuit structural drawing and control system force (forcing) pump shown in Figure 4 at distribution pressure shown in Figure 3 are controlled in the executive circuit structural drawing: first operational amplifier A 11, the 3rd operational amplifier A 21With the 5th operational amplifier A 31A shared single supply four high guaily unit device chip.Second operational amplifier A 12, four-operational amplifier A 22, the 6th operational amplifier A 32With the driving operational amplifier A E2A shared single supply six amplifier device chips.
In control system working power circuit structural drawing shown in Figure 5:
Power lead is connected to two mains electricity input end m, n through the power switch contact K of power switch 10.The series arm of the relay normally open contact J-1 of solid-state relay J and force (forcing) pump 9 motor M is connected across between two mains electricity input end m, the n; Rectifier bridge B rAc input end be connected across between two mains electricity input end m, the n.
Rectifier bridge B rThe cathode output end and the first filter capacitor C 3Positive pole connect rectifier bridge B rThe cathode output end body contact.The first filter capacitor C 3The negative pole body contact; Absorb capacitor C 4With absorbing resistor R 4Parallel connection, an end of this parallel branch and the first filter capacitor C 3Positive pole connect the other end and absorption diode D 3Positive pole connect; Absorption diode D 3Negative pole and PWM controller chip U 16,7,8 pin connect.PWM controller chip U 11,2 pin body contacts; PWM controller chip U 13 pin and the second filter capacitor C 5Positive pole connect the second filter capacitor C 5The negative pole body contact; PWM controller chip U 14 pin through buffer capacitor C 6Body contact; PWM controller chip U 15 pin unsettled.Divider resistance R 5Be connected across the first filter capacitor C 3Positive pole and PWM controller chip U 13 pin between.
Primary winding of output transformer Tr end of the same name is connected to the first filter capacitor C 3Positive pole, its different name end is connected to PWM controller chip U 16,7,8 pin; The magnetic test coil of output transformer Tr end of the same name is through current-limiting resistance R 6With commutation diode D 6Negative pole connect commutation diode D 6Positive pole be connected to PWM controller chip U 13 pin; The magnetic test coil of output transformer Tr termination shell of the same name; First secondary coil end of the same name of output transformer Tr and the equal ground connection of second secondary coil end of the same name; The first secondary coil different name end of output transformer Tr and the second secondary coil different name end respectively with carry out power rectifier diode D 4Negative pole and signal Processing power rectifier diode D 5Positive pole connect.Carry out power rectifier diode D 4Anodal simultaneously and carry out the power supply first filter capacitor C 7Anodal and carry out the power filter inductance L 3An end connect; Carry out the power supply first filter capacitor C 7Minus earth; Carry out the power filter inductance L 3The other end with carry out the power supply second filter capacitor C 8Positive pole connect, this tie point is connected to carries out power positive end E eSignal Processing power rectifier diode D 5Anodal simultaneously and the signal Processing power supply first filter capacitor C 9Positive pole and signal Processing power filter inductance L 4An end connect; Signal Processing power filter inductance L 4The other end and the signal Processing power supply second filter capacitor C 10Positive pole connect, this tie point is connected to signal Processing power positive end E s
Feedback current-limiting resistance R 7An end be connected to and carry out power positive end E e, the other end and feedback optocoupler LC F1 pin connect.Feedback dividing potential drop first resistance R 8An end be connected to and carry out power positive end E e, the other end and feedback dividing potential drop second resistance R 9An end connect; Feedback dividing potential drop second resistance R 9Other end ground connection.Reference voltage source device U 2Positive pole and feedback optocoupler LC F2 pin connect reference voltage source device U 2Minus earth, reference voltage source device U 2The control utmost point be connected to and feed back dividing potential drop first resistance R 8With feedback dividing potential drop second resistance R 9Tie point.Self-excitation absorbs capacitor C 11Be connected across reference voltage source device U 2Positive pole and control the utmost point between.Feedback optocoupler LC F3 pin body contacts, feedback optocoupler LC F4 pin and PWM controller chip U 14 pin connect.

Claims (10)

1. distribution pressure control circuit; It is characterized in that: with votage control switch-servo-valve control mode; Utilize the pressure signal and the given signal of pressure perception; Through amplifying, carry out the control system that link is formed by signal comparison, amplification, processing, conversion, driving, to a plurality of different bladder of controlled device constant voltage Deformation control of filling, exit; The distribution pressure control circuit that constitutes control pressurer system is assemblied in the control enclosure, includes circuit tie lines device, pressure transducer, electrical servo valve and force (forcing) pump; Circuit tie lines in the control enclosure is made up of pressure signal control and treatment circuit, driving circuit of servo valve, force (forcing) pump control executive circuit and working power circuit;
The pressure signal of each pressure transducer is incorporated into each pressure signal amplification, processing unit through each pressure sensor signal end, after amplifying, handling, forms the low value signal of each pressure and exports with each pressure high-value signal;
The low value signal of each pressure is incorporated into each electrical servo valve driver element with the pressure high-value signal through each pressure low value signal end and pressure high-value signal end, treated, amplify after, form preceding electrical servo valve drive signal and export;
In each electrical servo valve driver element; Pressure low value signal end is connected with two diode cathodes of formation or door respectively with pressure high-value signal end; The anodal of two diodes all is connected with the inverting input of operational amplifier, and the output terminal of operational amplifier is promptly as electrical servo valve drive signal end;
The low value signal of each pressure is incorporated into relay drive unit through corresponding pressure low value signal end respectively, treated, amplify after, form relay drive signal, drive the solid-state relay action.
2. distribution pressure control circuit according to claim 1; It is characterized in that: the pressure signal control and treatment circuit comprises that preceding pressure signal amplification, processing unit SC1, the amplification of middle pressure signal, processing unit SC2 and back pressure signal amplify, processing unit SC3; Driving circuit of servo valve comprises preceding electrical servo valve driver element VD1, middle electrical servo valve driver element VD2 and back electrical servo valve driver element VD3; Force (forcing) pump control executive circuit comprises relay drive unit JDr, solid-state relay J and pressurization pump motor M, and working power circuit comprises working power converter unit UPS and power switch; Preceding pressure transducer is through preceding pressure sensor signal end s 1Amplify with preceding pressure signal with signal ground end g, processing unit SC1 is connected, middle pressure transducer is through middle pressure sensor signal end s 2Amplify with middle pressure signal with signal ground end g, processing unit SC2 is connected, back pressure transducer is through back pressure sensor signal end s 3Be connected with back pressure signal amplification, processing unit SC3 with signal ground end g; Coaxial three potentiometers are that the preceding potentiometer swing arm end and zero resistance of appropriate degree regulator holds the preceding appropriate degree that all is connected to preceding pressure signal amplification, processing unit SC1 to regulate given side r E1, coaxial three potentiometers are that the middle potentiometer swing arm end and zero resistance of appropriate degree regulator holds the middle appropriate degree that all is connected to middle pressure signal amplification, processing unit SC2 to regulate given side r E2, coaxial three potentiometers are that the back potentiometer swing arm end and zero resistance of appropriate degree regulator holds the back appropriate degree that all is connected to back pressure signal amplification, processing unit SC3 to regulate given side r E3, coaxial three potentiometers are that the high resistant end that respectively joins of appropriate degree regulator all is connected to signal ground end g; Preceding pressure signal amplifies, processing unit SC1 passes through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Be connected with preceding electrical servo valve driver element VD1; Middle pressure signal amplifies, processing unit SC2 passes through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Be connected with middle electrical servo valve driver element VD2; Back pressure signal amplifies, processing unit SC3 passes through back pressure low value signal end a 3With back pressure high-value signal end b 3Electrical servo valve driver element VD3 is connected with the back; Simultaneously, preceding pressure signal amplification, processing unit SC1 are through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1, middle pressure signal amplifies, processing unit SC2 passes through middle pressure low value signal end a 2With middle pressure high-value signal end b 2, back pressure signal amplifies, processing unit SC3 passes through back pressure low value signal end a 3With back pressure high-value signal end b 3, all be connected to relay drive unit JDr; The solenoid of preceding electrical servo valve is through preceding electrical servo valve drive signal end v 1With execution power positive end E eBe connected with preceding electrical servo valve driver element VD1, the solenoid of middle electrical servo valve is through middle electrical servo valve drive signal end v 2With execution power positive end E eBe connected with middle electrical servo valve driver element VD2, the solenoid of back electrical servo valve is through back electrical servo valve drive signal end v 3With execution power positive end E eElectrical servo valve driver element VD3 is connected with the back; The solenoid of pressure release electrical servo valve is through pressure release drive signal end v xBe connected with relay drive unit JDr with signal ground end g; Relay drive unit JDr drives current limliting end p through relay eWith relay drive signal end p oJ is connected with solid-state relay; The relay normally open contact J-1 of solid-state relay J and pressurization pump motor M are in series, and this series arm is connected across between two output contacts of power switch; Between two output contacts that the two mains electricity input end m of working power converter unit UPS, n are connected across power switch.
3. distribution pressure control circuit according to claim 2 is characterized in that: the pressure signal of preceding pressure transducer is through preceding pressure sensor signal end s 1Pressure signal amplification, processing unit SC1 before being incorporated into, after amplifying, handling, pressure hangs down value signal and preceding pressure high-value signal before forming, through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Output; The pressure signal of middle pressure transducer is through middle pressure sensor signal end s 2Pressure signal amplification, processing unit SC2 in being incorporated into, after amplifying, handling, low value signal of pressure and middle pressure high-value signal in the formation are through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Output; The pressure signal of back pressure transducer is through back pressure sensor signal end v 3Be incorporated into back pressure signal amplification, processing unit SC3, after amplifying, handling, form back pressure and hang down value signal and back pressure high-value signal, through back pressure low value signal end a 3With back pressure high-value signal end b 3Output;
Preceding pressure signal amplification, processing unit SC1, the amplification of middle pressure signal, processing unit SC2 and back pressure signal amplify, processing unit SC3 forms by comparison, computing, amplifying circuit and optocoupler separation circuit;
In preceding pressure signal amplification, processing unit SC1, preceding pressure sensor signal end s 1Be connected to first operational amplifier A 11Positive input; First operational amplifier A 11Output terminal through preceding separation threshold potential device G 1With preceding drop-down optocoupler LC 11Input end and on carry optocoupler LC 12Input end connect, more respectively before drop-down optocoupler LC 11With on carry optocoupler LC 12Output terminal constitute before pressure low value signal end a 1With preceding pressure high-value signal end b 1In middle pressure signal amplification, processing unit SC2, middle pressure sensor signal end s 2Be connected to the 3rd operational amplifier A 21Positive input; The 3rd operational amplifier A 21Output terminal through middle separation threshold potential device G 2With in drop-down optocoupler LC 21Input end with on carry optocoupler LC 22Input end connect, more respectively with in drop-down optocoupler LC 21With on carry optocoupler LC 22Output terminal constitute in pressure low value signal end a 2With middle pressure high-value signal end b 2In back pressure signal amplification, processing unit SC3, back pressure sensor signal end v 3Be connected to the 5th operational amplifier A 31Positive input; The 5th operational amplifier A 31Output terminal through separating threshold potential device G 3With drop-down optocoupler LC 31Input end and on carry optocoupler LC 32Input end connect, more respectively with drop-down optocoupler LC 31With on carry optocoupler LC 32Output terminal constitute back pressure low value signal end a 3With back pressure high-value signal end b 3
4. distribution pressure control circuit according to claim 2 is characterized in that: low value signal of preceding pressure and preceding pressure high-value signal are through preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Electrical servo valve driver element VD1 before being incorporated into, treated, amplify after, electrical servo valve drive signal before forming is through preceding electrical servo valve drive signal end v 1Output; Low value signal of middle pressure and middle pressure high-value signal are through middle pressure low value signal end a 2With middle pressure high-value signal end b 2Electrical servo valve driver element VD2 in being incorporated into, treated, amplify after, electrical servo valve drive signal in the formation is through middle electrical servo valve drive signal end v 2Output; The low value signal of back pressure passes through back pressure low value signal end a with back pressure high-value signal 3With back pressure high-value signal end b 3Be incorporated into back electrical servo valve driver element VD3, treated, amplify after, form back electrical servo valve drive signal, through back electrical servo valve drive signal end v 3Output;
Before electrical servo valve driver element VD1, middle electrical servo valve driver element VD2 and back electrical servo valve driver element VD3 by or door treatment circuit and operational amplification circuit form;
In preceding electrical servo valve driver element VD1, preceding pressure low value signal end a 1With preceding pressure high-value signal end b 1Respectively with constitute or the low value signal diode D of door 11Negative pole and high-value signal diode D 12Negative pole connects, low value signal diode D 11Positive pole and high-value signal diode D 12Anodal all with second operational amplifier A 12Inverting input connect second operational amplifier A 12Output terminal promptly as preceding electrical servo valve drive signal end v 1In middle electrical servo valve driver element VD2, middle pressure low value signal end a 2With middle pressure high-value signal end b 2Respectively with constitute or the low value signal diode D of door 21Negative pole and high-value signal diode D 22Negative pole connects, low value signal diode D 21Positive pole and high-value signal diode D 22Anodal all with four-operational amplifier A 22Inverting input connect four-operational amplifier A 22Output terminal promptly as in electrical servo valve drive signal end v 2In the electrical servo valve driver element VD3 of back, back pressure low value signal end a 3With back pressure high-value signal end b 3Respectively with constitute or the low value signal diode D of door 31Negative pole and high-value signal diode D 32Negative pole connects, low value signal diode D 31Positive pole and high-value signal diode D 32Anodal all with the 6th operational amplifier A 32Inverting input connect the 6th operational amplifier A 32Output terminal promptly as back electrical servo valve drive signal end v 3
5. distribution pressure control circuit according to claim 2 is characterized in that: relay drive unit JDr by or door treatment circuit and operational amplification circuit form; The low value signal of preceding pressure, the low value signal of middle pressure and the low value signal of back pressure pass through preceding pressure low value signal end a respectively 1, middle pressure low value signal end a 2With back pressure low value signal end a 3Be incorporated into relay drive unit JDr, treated, amplify after, form relay drive signal, through relay drive signal end p oOutput to solid-state relay J control end, drive solid-state relay J action;
Preceding pressure low value signal end a 1, middle pressure low value signal end a 2With back pressure low value signal end a 3Respectively with constitute or the preceding diode D of door E1Negative pole, middle diode D E1Negative pole and back diode D E3Negative pole connects, preceding diode D E1Positive pole, middle diode D E1Positive pole and back diode D E3Anodal all with the driving operational amplifier A E2Inverting input connect, drive operational amplifier A E2Output terminal promptly as relay drive signal end p o, being connected with the control end of solid-state relay J, the relay normally open contact J-1 of solid-state relay J promptly carries out switch as the power supply of force (forcing) pump motor M;
Drive or the family status one diode D E1Negative pole, driving or the family status two diode D E2Negative pole and driving or the family status three diode D E3Negative pole be connected respectively to before pressure low value signal end a 1, middle pressure low value signal end a 2With back pressure low value signal end a 3, drive or the family status one diode D E1Positive pole, driving or the family status two diode D E2Positive pole and driving or the family status three diode D E3Anodal all with the driving operational amplifier A E2Inverting input connect; Divider resistance R on this anti-phase tie point and the drive signal E3An end and drive signal under divider resistance R E4An end connect; Divider resistance R on the drive signal E3The other end with carry out power positive end E eConnect; Divider resistance R under the drive signal E4Other end ground connection; Drive divider resistance R on the working point E5An end with drive divider resistance R under the working point E6An end all with drive operational amplifier A E2In-phase input end connect; Drive divider resistance R on the working point E5The other end with carry out power positive end E eConnect; Drive divider resistance R under the working point E6Other end ground connection; Drive operational amplifier A E2The working power positive terminal with carry out power positive end E eConnect, drive operational amplifier A E2Earth terminal ground connection; Relay drives current-limiting resistance R JAn end with carry out power positive end E eConnect, relay drives current-limiting resistance R JThe other end relay that is connected to solid-state relay J drive current limliting end p eIsolating diode D JNegative pole end with drive operational amplifier A E2Output terminal connect, this tie point is connected to the relay drive signal end p of solid-state relay J oIsolating diode D JNegative pole end and blowdown valve sustained diode vPositive pole connect, this tie point is as pressure release drive signal end v xThe blowdown valve sustained diode vMinus earth.
6. according to claim 3,4 or 5 described distribution pressure control circuits, it is characterized in that: first operational amplifier A 11, the 3rd operational amplifier A 21With the 5th operational amplifier A 31A shared single supply four high guaily unit device chip; Second operational amplifier A 12, four-operational amplifier A 22, the 6th operational amplifier A 32With the driving operational amplifier A E2A shared single supply six amplifier device chips.
7. according to claim 2 or 3 described distribution pressure control circuits, it is characterized in that: in preceding pressure signal amplification, processing unit SC1, front signal divider resistance R 11An end and signal processing circuit power end E sConnect the other end and first operational amplifier A 11In-phase input end connect; This homophase incoming junction is as preceding pressure sensor signal end s 1, the equivalent resistance R of pressure transducer before being connected to P1An end, the equivalent resistance R of preceding pressure transducer P1The other end be connected to signal ground end g; Signal ground end g ground connection; The preceding first working point divider resistance R 12An end and signal processing circuit power end E sConnect the other end and first operational amplifier A 11Inverting input connect; This anti-phase incoming junction is connected to the preceding potentiometer R of appropriate degree regulator 13An end, the preceding potentiometer R of appropriate degree regulator 13The other end be connected to signal ground end g; First operational amplifier A 11Working power positive terminal and signal processing circuit power end E sConnect first operational amplifier A 11Earth terminal be connected with signal ground end g; Before drop-down optocoupler LC 11Input cathode be connected to signal processing circuit power end E s, preceding drop-down optocoupler LC 11Input anode with preceding separate threshold potential device G 1A quiet arm connect; Before drop-down optocoupler LC 11Negative pole of output end be connected to and carry out power positive end E e, preceding drop-down optocoupler LC 11Output head anode be connected to before pressure low value signal end a 1The preceding threshold potential device G that separates 1The swing arm and first operational amplifier A 11Output terminal connect; The preceding threshold potential device G that separates 1Another quiet arm and preceding on carry optocoupler LC 12Input cathode connect, carry optocoupler LC on preceding 12Input anode and preceding threshold value tunnel diode TVS 1Positive pole connect; Preceding threshold value tunnel diode TVS 1Negative pole be connected with signal ground end g; Carry optocoupler LC on preceding 12Negative pole of output end be connected to and carry out power positive end E e, carry optocoupler LC on preceding 12Output head anode be connected to before pressure high-value signal end b 1
Before or the family status one diode D 11Negative pole and the preceding or family status two diode D 12Negative pole be connected respectively to before pressure low value signal end a 1With preceding pressure high-value signal end b 1, the preceding or family status one diode D 11Positive pole and the preceding or family status two diode D 12Anodal all draw resistance R with preceding or the student 14An end connect, this tie point is connected to second operational amplifier A 12Inverting input; Preceding or the student draws resistance R 14An end ground connection; Divider resistance R on preceding second working point 15An end with carry out power positive end E eConnect; Divider resistance R on preceding second working point 15The other end and preceding second working point under divider resistance R 16An end connect this tie point and second operational amplifier A 12In-phase input end connect; Divider resistance R under preceding second working point 16Other end ground connection; Second operational amplifier A 12The working power positive terminal with carry out power positive end E eConnect second operational amplifier A 12Earth terminal ground connection; Preceding sustained diode 13Positive terminal with carry out power positive end E eConnect preceding sustained diode 13The positive terminal and second operational amplifier A 12Output terminal connect, this tie point is connected to preceding electrical servo valve drive signal end v 1
8. according to claim 2 or 3 described distribution pressure control circuits, it is characterized in that: in middle pressure signal amplification, processing unit SC2, middle signal divider resistance R 21An end and signal processing circuit power end E sConnect the other end and the 3rd operational amplifier A 21In-phase input end connect; Pressure sensor signal end s in this homophase incoming junction conduct 2, the equivalent resistance R of pressure transducer in being connected to P2An end, the equivalent resistance R of middle pressure transducer P2The other end be connected to signal ground end g; Signal ground end g ground connection; In the first working point divider resistance R 22An end and signal processing circuit power end E sConnect the other end and the 3rd operational amplifier A 21Inverting input connect; This anti-phase incoming junction is connected to the middle potentiometer R of appropriate degree regulator 23An end, the middle potentiometer R of appropriate degree regulator 23The other end be connected to signal ground end g; The 3rd operational amplifier A 21Working power positive terminal and signal processing circuit power end E sConnect the 3rd operational amplifier A 21Earth terminal be connected with signal ground end g; In drop-down optocoupler LC 21Input cathode be connected to signal processing circuit power end E s, in drop-down optocoupler LC 21Input anode with in separate threshold potential device G 2A quiet arm connect; In drop-down optocoupler LC 21Negative pole of output end be connected to and carry out power positive end E e, in drop-down optocoupler LC 21Output head anode be connected in pressure low value signal end a 2The middle threshold potential device G that separates 2Swing arm and the 3rd operational amplifier A 21Output terminal connect; The middle threshold potential device G that separates 2Another quiet arm with on carry optocoupler LC 22Input cathode connect, on carry optocoupler LC 22Input anode and middle threshold value tunnel diode TVS 2Positive pole connect; Middle threshold value tunnel diode TVS 2Negative pole be connected with signal ground end g; In on carry optocoupler LC 22Negative pole of output end be connected to and carry out power positive end E e, on carry optocoupler LC 22Output head anode be connected in pressure high-value signal end b 2
In or the family status one diode D 21Negative pole with in or the family status two diode D 22Negative pole be connected respectively in pressure low value signal end a 2With middle pressure high-value signal end b 2, in or the family status one diode D 21Positive pole with in or the family status two diode D 22Anodal all with in or the student draw resistance R 24An end connect, this tie point is connected to four-operational amplifier A 22Inverting input; In or the student draw resistance R 24An end ground connection; In divider resistance R on second working point 25An end with carry out power positive end E eConnect; In divider resistance R on second working point 25The other end with in divider resistance R under second working point 26An end connect this tie point and four-operational amplifier A 22In-phase input end connect; In divider resistance R under second working point 26Other end ground connection; Four-operational amplifier A 22The working power positive terminal with carry out power positive end E eConnect four-operational amplifier A 22Earth terminal ground connection; Middle sustained diode 23Positive terminal with carry out power positive end E eConnect middle sustained diode 23Positive terminal and four-operational amplifier A 22Output terminal connect, this tie point is connected to middle electrical servo valve drive signal end v 2
9. according to claim 2 or 3 described distribution pressure control circuits, it is characterized in that: in back pressure signal amplification, processing unit SC3, back signal divider resistance R 31An end and signal processing circuit power end E sConnect the other end and the 5th operational amplifier A 31In-phase input end connect; This homophase incoming junction is as back pressure sensor signal end s 3, the equivalent resistance R of pressure transducer after being connected to P3An end, the equivalent resistance R of back pressure transducer P3The other end be connected to signal ground end g; Signal ground end g ground connection; The back first working point divider resistance R 32An end and signal processing circuit power end E sConnect the other end and the 5th operational amplifier A 31Inverting input connect; This anti-phase incoming junction is connected to the back potentiometer R of appropriate degree regulator 33An end, the back potentiometer R of appropriate degree regulator 33The other end be connected to signal ground end g; The 5th operational amplifier A 31Working power positive terminal and signal processing circuit power end E sConnect the 5th operational amplifier A 31Earth terminal be connected with signal ground end g; The drop-down optocoupler LC in back 31Input cathode be connected to signal processing circuit power end E s, the drop-down optocoupler LC in back 31Input anode with after separate threshold potential device G 3A quiet arm connect; The drop-down optocoupler LC in back 31Negative pole of output end be connected to and carry out power positive end E e, the drop-down optocoupler LC in back 31Output head anode be connected to back pressure low value signal end a 3Threshold potential device G is separated in the back 3Swing arm and the 5th operational amplifier A 31Output terminal connect; Threshold potential device G is separated in the back 3Another quiet arm with the back on carry optocoupler LC 32Input cathode connect, carry optocoupler LC on the back 32Input anode and back threshold value tunnel diode TVS 3Positive pole connect; Back threshold value tunnel diode TVS 3Negative pole be connected with signal ground end g; Carry optocoupler LC on the back 32Negative pole of output end be connected to and carry out power positive end E e, carry optocoupler LC on the back 32Output head anode be connected to back pressure high-value signal end b 3
Back or the family status one diode D 31Negative pole with the back or the family status two diode D 32Negative pole be connected respectively to back pressure low value signal end a 3With back pressure high-value signal end b 3, back or the family status one diode D 31Positive pole with the back or the family status two diode D 32Anodal all with afterwards or the student draw resistance R 34An end connect, this tie point is connected to the 6th operational amplifier A 32Inverting input; The back or the student draw resistance R 34An end ground connection; Divider resistance R on second working point, back 35An end with carry out power positive end E eConnect; Divider resistance R on second working point, back 35The other end with the back second working point under divider resistance R 36An end connect this tie point and the 6th operational amplifier A 32In-phase input end connect; Divider resistance R under second working point, back 36Other end ground connection; The 6th operational amplifier A 32The working power positive terminal with carry out power positive end E eConnect the 6th operational amplifier A 32Earth terminal ground connection; Subsequent flows diode D 33Positive terminal with carry out power positive end E eConnect subsequent flows diode D 33Positive terminal and the 6th operational amplifier A 32Output terminal connect, this tie point is connected to back electrical servo valve drive signal end v 3
10. distribution pressure control circuit according to claim 2 is characterized in that:
Power lead is connected to two mains electricity input end m, n through the power switch contact K of power switch (10); The series arm of the relay normally open contact J-1 of solid-state relay J and force (forcing) pump (9) motor M is connected across between two mains electricity input end m, the n; Rectifier bridge B rAc input end be connected across between two mains electricity input end m, the n;
Rectifier bridge B rThe cathode output end and the first filter capacitor C 3Positive pole connect rectifier bridge B rThe cathode output end body contact; The first filter capacitor C 3The negative pole body contact; Absorb capacitor C 4With absorbing resistor R 4Parallel connection, an end of this parallel branch and the first filter capacitor C 3Positive pole connect the other end and absorption diode D 3Positive pole connect; Absorption diode D 3Negative pole and PWM controller chip U 16,7,8 pin connect; PWM controller chip U 11,2 pin body contacts; PWM controller chip U 13 pin and the second filter capacitor C 5Positive pole connect the second filter capacitor C 5The negative pole body contact; PWM controller chip U 14 pin through buffer capacitor C 6Body contact; PWM controller chip U 15 pin unsettled; Divider resistance R 5Be connected across the first filter capacitor C 3Positive pole and PWM controller chip U 13 pin between;
Primary winding of output transformer Tr end of the same name is connected to the first filter capacitor C 3Positive pole, its different name end is connected to PWM controller chip U 16,7,8 pin; The magnetic test coil of output transformer Tr end of the same name is through current-limiting resistance R 6With commutation diode D 6Negative pole connect commutation diode D 6Positive pole be connected to PWM controller chip U 13 pin; The magnetic test coil of output transformer Tr termination shell of the same name; First secondary coil end of the same name of output transformer Tr and the equal ground connection of second secondary coil end of the same name; The first secondary coil different name end of output transformer Tr and the second secondary coil different name end respectively with carry out power rectifier diode D 4Negative pole and signal Processing power rectifier diode D 5Positive pole connect; Carry out power rectifier diode D 4Anodal simultaneously and carry out the power supply first filter capacitor C 7Anodal and carry out the power filter inductance L 3An end connect; Carry out the power supply first filter capacitor C 7Minus earth; Carry out the power filter inductance L 3The other end with carry out the power supply second filter capacitor C 8Positive pole connect, this tie point is connected to carries out power positive end E eSignal Processing power rectifier diode D 5Anodal simultaneously and the signal Processing power supply first filter capacitor C 9Positive pole and signal Processing power filter inductance L 4An end connect; Signal Processing power filter inductance L 4The other end and the signal Processing power supply second filter capacitor C 10Positive pole connect, this tie point is connected to signal Processing power positive end E s
Feedback current-limiting resistance R 7An end be connected to and carry out power positive end E e, the other end and feedback optocoupler LC F1 pin connect; Feedback dividing potential drop first resistance R 8An end be connected to and carry out power positive end E e, the other end and feedback dividing potential drop second resistance R 9An end connect; Feedback dividing potential drop second resistance R 9Other end ground connection; Reference voltage source device U 2Positive pole and feedback optocoupler LC F2 pin connect reference voltage source device U 2Minus earth, reference voltage source device U 2The control utmost point be connected to and feed back dividing potential drop first resistance R 8With feedback dividing potential drop second resistance R 9Tie point; Self-excitation absorbs capacitor C 11Be connected across reference voltage source device U 2Positive pole and control the utmost point between; Feedback optocoupler LC F3 pin body contacts, feedback optocoupler LC F4 pin and PWM controller chip U 14 pin connect.
CN 201210031958 2012-02-14 2012-02-14 Distribution pressure control circuit Expired - Fee Related CN102591372B (en)

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CN201035419Y (en) * 2007-04-03 2008-03-12 曾明福 Inflator pressure automatic control device
CN201906337U (en) * 2011-01-06 2011-07-27 山东大学 Animal internal-organ dilator
CN102318988A (en) * 2011-06-14 2012-01-18 江南大学 Automatic deforming healthcare pillow

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US20010025662A1 (en) * 2000-03-30 2001-10-04 Maki Kawamura Pressure regulation valve
WO2003057998A2 (en) * 2002-01-08 2003-07-17 Optimus Water Technologies Ltd. Water supply system
CN1955870A (en) * 2005-10-28 2007-05-02 上海欧达电气成套设备工程有限公司 Device for controlling constant-pressure system at hydraulic pressure of planisher
CN201035419Y (en) * 2007-04-03 2008-03-12 曾明福 Inflator pressure automatic control device
CN201906337U (en) * 2011-01-06 2011-07-27 山东大学 Animal internal-organ dilator
CN102318988A (en) * 2011-06-14 2012-01-18 江南大学 Automatic deforming healthcare pillow

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016192122A1 (en) * 2015-06-01 2016-12-08 刘宝社 Automatic height-adjusting pillow cushion

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