CN2282213Y - Intelligent operator for electric actuator - Google Patents
Intelligent operator for electric actuator Download PDFInfo
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- CN2282213Y CN2282213Y CN 96232375 CN96232375U CN2282213Y CN 2282213 Y CN2282213 Y CN 2282213Y CN 96232375 CN96232375 CN 96232375 CN 96232375 U CN96232375 U CN 96232375U CN 2282213 Y CN2282213 Y CN 2282213Y
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 230000011664 signaling Effects 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000007257 malfunction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to an intelligent operator for electric actuator, which at least comprises a control signal analog-to-digital conversion circuit IC1And at least one corresponding position signal analog-to-digital conversion circuit IC2And singlechip CPU, motor forward/backward rotation drive circuit IC3、IC4Composition of, IC1IS connected with the opening control signal output end IS of the electric actuator of the automatic control system, and IC2Is inputted withThe position feedback signal output end IV of the electric actuator is connected with an IC1、IC2The output of the motor is connected with the input and output ends of the CPU, and two control output ends of the CPU are connected with the motor forward rotation driving circuit IC3And motor reverse driving circuit IC4Input connection of, IC3、IC4The output of the controller is respectively connected with forward rotation and reverse rotation control ends DINC and DDEC of the electric actuator.
Description
The utility model relates to a kind of manipulater that is used to control such as the action of electric actuator such as electrically operated valve, electronic baffle plate.
At present, all to use electric actuator, control and all will realize as liquid measure, the tolerance of boiler, and air quantity control will lean on electronic baffle plate to realize by electrically operated valve in many fields such as electric power, chemical industry, metallurgy.These electric actuator are all controlled by automatic control system, are example with the generating plant, and the action of the electric actuator in its boiler, genset and the cooling tower is controlled by the automatic control system of generating plant control center.And, all must finish by manipulater for making these electric actuator work.Existing manipulater mainly is made of magnetrol, it is compared by automatic control system aperture control signal of sending and the position signalling that himself feeds back electric actuator, and resulting comparison output signal also will be controlled the action of electric actuator by servoamplifier.Because this manipulater has adopted magnetrol, then cause the electric actuator frequent movement and damage motor for anti-locking system inner looping vibration, all the dead band to be set on magnetrol, the existence in this dead band makes the regulation quality of automatic control system descend, and also is difficult to suppress the inner looping vibration and damages electric actuator even sometimes the dead band of magnetrol is transferred to maximum.Defectives such as and this manipulater can't solve the closing problem at zero point of electric actuator, and it also exists volume big, and poor reliability is intelligent low, and the design and installation maintenance workload is big.In addition, this manipulater can make electric actuator malfunction or tripping occur at electric actuator or circuit or when itself breaking down, and influences the safe operation of system.
The purpose of this utility model is exactly in order to address the above problem, and a kind of regulation quality that can improve automatic control system greatly is provided, and the electric actuator intelligent operator of inferred-zero closing problem.
Technical solution of the present utility model:
A kind of electric actuator intelligent operator, it is characterized in that it is at least by a control signal analog-digital converter circuit IC1 and at least one corresponding position signalling analog-digital converter circuit IC2 and singlechip CPU, motor just, reversing drive circuit IC3, IC4 forms, the input of its IC1 is connected with the electric actuator aperture control signal output ends IS of automatic control system, the input of IC2 is connected with the position feed back signal output terminal IV of electric actuator, IC1, the output of IC2 is connected with the input/output terminal of CPU, two control output ends of CPU are connected IC3 with the input that motor is just changeing driving circuit IC3 and motor reversing drive circuit IC4, the output of IC4 respectively with electric actuator rotate and reverse control end DINC, DDEC connects.
The utility model is introduced micro computer in the manipulater first, its volume reduces, alleviated the workload of design and installation and maintenance greatly, intelligent degree and reliability improve greatly, it is under close-loop control mode, automatically the dead band of setting operation device, and the action that can differentiate electric actuator belongs to normal adjusting behavior or inner looping vibration, make manipulater under the non-oscillating prerequisite of inner looping, have minimum dead band, can effectively overcome mechanism's inertia of electric actuator, automatically remember the operating characteristic of electric actuator, thereby the electric actuator aperture is accurately located, both improve the regulation quality of automatic control system greatly, prevented the inner looping vibration again effectively and the damage electric actuator, the serviceable life of prolongation electric actuator.The utility model also has the dead band function that disappears zero point, can solve well and be output as 0% and electrically operated valve can not close dead problem when water level, steam temperature etc. carry out closed-loop control automatically, can improve the devoting rate of closed-loop control system, especially more effective when running on the lower load and valve leakage current are big.In addition, when the utility model makes electric actuator malfunction or tripping occur hindering for some reason, the power that can under the malfunction state, cut off electric actuator automatically, and send sound and light alarm, under the tripping state, send alerting signal, thus greatly the high security of production run.The utility model is useful in the occasion (no matter signal is 0-10mA or 4-20mA) of all electric actuator as support equipment.
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is an electrical schematic diagram of the present utility model;
Fig. 3 is the electrical schematic diagram that control signal analog-digital converter circuit or position signalling analog-digital converter circuit adopt A/D converter.
As Fig. 1, control signal analog-digital converter circuit IC1 of the present utility model or position signalling analog-digital converter circuit IC2 all can adopt current/voltage-converted circuit and analog to digital conversion integrated package A/D to form, its current/voltage-converted circuit is by amplifier U1 ', diode D1 ', D2 ', resistance R 1 '-R5 ' composition, its input is that the input end of U1 ' links to each other with the electric actuator aperture control signal output ends IS of automatic control system or the position feed back signal output terminal IV of electric actuator, its output is the input of the output termination A/D of U1 ', the parallel output terminal D0-D7 of A/D link to each other with the parallel input/output port of singlechip CPU (as Fig. 3).Control signal analog-digital converter circuit IC1 also can be made up of current/voltage-converted circuit and voltage/frequency change-over circuit, wherein the current/voltage-converted circuit is by amplifier U1, diode D1, D2, resistance R 1-R5 constitutes, the voltage/frequency change-over circuit is made up of voltage/frequency conversion integration block U2 and peripheral circuit thereof, the input of current/voltage-converted circuit is the electric actuator aperture control signal output ends IS of the input termination automatic control system of U1, its output is the input of the output termination voltage/frequency change-over circuit U2 of U1, and the output of U2 connects the input/output terminal of singlechip CPU.Circuit structure and the IC1 of position signalling analog-digital converter circuit IC2 are identical, it is made up of current/voltage-converted circuit U 4 and voltage/frequency change-over circuit U5, the input of U4 links to each other with the position feed back signal output terminal IV of electric actuator, the output of U4 connects the input of U5, and the output of U5 also links to each other with the input/output terminal of CPU.See Fig. 2.Motor of the present utility model is just changeing driving circuit IC3 and is including the buffer circuit of being made up of transistor T 4 and controllable silicon output optocoupler U7, by transistor T 3, rectifier bridge D7-D10, resistance R 30-R33, low-voltage trigger circuit that capacitor C 9 is formed and by bidirectional triode thyristor B1, capacitor C 7, C8, resistance R 28, the control circuit that R29 forms, the input of the base stage of transistor T 4 links to each other with the corresponding control output end of singlechip CPU in its buffer circuit, the collector output of T4 connects the input of controllable silicon output optocoupler U7, the output of U7 connects the base bias circuit of T3 in the low-voltage trigger circuit by R33, the collector of T3 connects the output control terminal of U7, the output of U7 links to each other with the output of rectifier bridge D7-D10 by R33 simultaneously, the input of D7-D10 respectively with control circuit in the end of bidirectional triode thyristor B1 link to each other with trigger end, the just commentaries on classics control end DINC and the common port COM of the two termination electric actuator of B1, line construction and the IC3 of reversing drive circuit IC4 are identical, it is also by the buffer circuit that is made of transistor T 6 and controllable silicon output optocoupler U8, low-voltage trigger circuit that constitute by transistor T 5 and rectifier bridge D12-D15 and form, just the counter-rotating control end DDEC and the common port COM of the two termination electric actuator of B2 by the control circuit that controllable silicon B2 constitutes.The utility model at singlechip CPU and motor just; reversing drive circuit IC3; be connected between the IC4 by FPGA (Field Programmable Gate Array) integrated package U10; relay J; optocoupler U9; the safety protective circuit IC5 that U11 forms; its optocoupler U9; the input end of U11 respectively with just; reversing drive circuit IC3; the output terminal of IC4 be electric actuator just; counter-rotating control end DINC; DDEC and common port COM link to each other; U9; the output terminal of U11 links to each other with the input end of FPGA (Field Programmable Gate Array) integrated package U10; two control output ends of singlechip CPU link to each other with two input ends in addition of U10; the output terminal of U10 is by complex pipe T7; T8 links to each other with the coil of relay J, and the normally closed contact J1 of J just is being serially connected in motor; reversing drive circuit IC3; between the common port COM of IC4.Also see Fig. 2.
Principle of work of the present utility model such as Fig. 2, deliver to the input end of current/voltage-converted circuit U 1 among the control signal analog-digital converter circuit IC1 by the current signal of the electric actuator aperture control signal output ends IS of automatic control system output, obtain the input end that a voltage signal is delivered to voltage/frequency change-over circuit U2 (model can be LM331) from the output terminal of U1, obtain the pulse signal that frequency is directly proportional with the aperture control input signals from the output of U2, singlechip CPU is sent in serial.Deliver to the input end of current/voltage-converted circuit U 4 among the position signalling analog-digital converter circuit IC2 by the current signal of the position feed back signal output terminal IV of electric actuator (as electrically operated valve) output, obtain the input end that a voltage signal is delivered to voltage/frequency change-over circuit U5 (model also can be LM331) from the output of U4, obtain the pulse signal that frequency is directly proportional with the position input signal from the output of U5, also singlechip CPU is delivered in serial.CPU counts, compares and handle these two pulse signals, judges that the motor of electric actuator is need just change, reverse or stall, then exports control signal corresponding from the control output end of CPU.Owing to adopted CPU, make control procedure full intellectualized, it can be made leading tendency to the duty of electric actuator and judges, thus can effectively solve close the zero point of the manipulater existence of existing electric actuator, the big defective of oscillation circuit and dead band.
If CPU judges when electric actuator need just be changeed, then high level of its control corresponding output terminal output is controlled transistor T 4 base stages that voltage to motor is just changeing buffer circuit among the driving circuit IC3, T4 just makes controllable silicon output optocoupler U7 work, U7 finishes high and low pressure and isolates, its output silicon controlled conducting is subjected to the control of transistor T 3, T3 is used for guaranteeing that controllable silicon B1 begins conducting when exchanging zero point, avoids impacting with high pressure, guarantees security of system.If when the motor of electric actuator is just changeing control end DINC ac high-voltage is being arranged, then biasing circuit R31, the R32 of T3 have voltage, the T3 saturation conduction, it is output as low-voltage, the output controllable silicon of U7 is ended, the output loop that low-voltage is triggered the rectifier bridge D7-D10 in the loop disconnects, and the trigger end of controllable silicon B1 can not get trigger voltage in the control circuit, can't make electric actuator work.Have only the motor of electric actuator just changeing control end DINC when exchanging zero point, the biasing circuit of T3 ends because of no pressure drop, then the output of the high voltage of T3 makes the output controllable silicon conducting of U7, make the output of rectifier bridge D7-D10 constitute the loop, then the trigger end of B1 has trigger voltage and conducting, the motor of connecting electric actuator is just going back to road IC3, finishes just changing a job of electric actuator and makes process.In like manner, motor reversing drive circuit IC4 finishes the counter-rotating course of work of electric actuator.If when needing the electric actuator stall, two output control terminals of CPU are low level output, motor forward and backward driving circuit IC3 then, the buffer circuit transistor T 4 of IC4, T6 all end, then controllable silicon output optocoupler U7, U8 all do not work, their low-voltage trigger circuit loop is cut off, and controllable silicon B1, B2 end, the moving actuator stall of discharge.
The utility model is owing to be connected to safety protective circuit IC5 between CPU and motor forward and backward driving circuit IC3, IC4, so thoroughly solved the malfunction problem that electric actuator occurs, security of system improves greatly.When motor is just changeing in the control circuit of driving circuit IC3 or motor reversing drive circuit IC4 controllable silicon B1 or the improper conducting of B2 and makes the electric actuator malfunction; then the input end of optocoupler U9 or U11 is a low level; their output terminal no pulse output; and this moment CPU two output control terminals be low level and deliver to FPGA (Field Programmable Gate Array) integrated package U10 (model can be PLSI1016); then U10 with above-mentioned four input signals compare with anti-interference process after; just make complex pipe T7 from its output terminal output signal; the T8 conducting; the coil electricity of relay J then; its normally closed contact J1 disconnects; thereby just with motor; reversing drive circuit IC3; the common port COM of IC4 and two driving circuits disconnect; force the electric actuator stall, reach the purpose of safeguard protection.When if two output control terminals of CPU have signal output, when making the B1 of IC3 or IC4 or B2 conducting, then U9 or U11 have pulse signal output, after the U10 comparison process, be judged to be normal condition, then the U10 output low level, make relay J keep ortho states, electric actuator operate as normal.
Claims (6)
1, a kind of electric actuator intelligent operator, it is characterized in that it is at least by a control signal analog-digital converter circuit IC1 and at least one corresponding position signalling analog-digital converter circuit IC2 and singlechip CPU, motor just, reversing drive circuit IC3, IC4 forms, the input of its IC1 is connected with the electric actuator aperture control signal output ends IS of automatic control system, the input of IC2 is connected with the position feed back signal output terminal IV of electric actuator, IC1, the output of IC2 is connected with the input/output terminal of CPU, two control output ends of CPU are connected IC3 with the input that motor is just changeing driving circuit IC3 and motor reversing drive circuit IC4, the output of IC4 respectively with electric actuator rotate and reverse control end DINC, DDEC connects.
2, by the described electric actuator intelligent operator of claim 1, it is characterized in that control signal analog-digital converter circuit IC1 or position signalling analog-digital converter circuit IC2 all can adopt current/voltage-converted circuit and analog to digital conversion integrated package A/D to form, its current/voltage-converted circuit is by amplifier U1 ', diode D1 ', D2 ', resistance R 1 '-R5 ' composition, its input is that the input end of U1 ' links to each other with the electric actuator aperture control signal output ends IS of automatic control system or the position feed back signal output terminal IV of electric actuator, its output is the input of the output termination A/D of U1 ', and the parallel output terminal D0-D7 of A/D links to each other with the parallel input/output port of singlechip CPU.
3, by the described electric actuator intelligent operator of claim 1, it is characterized in that control signal analog-digital converter circuit IC1 also can be made up of current/voltage-converted circuit and voltage/frequency change-over circuit, wherein the current/voltage-converted circuit is by amplifier U1, diode D1, D2, resistance R 1-R5 constitutes, the voltage/frequency change-over circuit is made up of voltage/frequency conversion integration block U2 and peripheral circuit thereof, the input of current/voltage-converted circuit is the electric actuator aperture control signal output ends IS of the input termination automatic control system of U1, its output is the input of the output termination voltage/frequency change-over circuit U2 of U1, and the output of U2 connects the input/output terminal of singlechip CPU.
4, by the described electric actuator intelligent operator of claim 1, the circuit structure and the IC1 that it is characterized in that position signalling analog-digital converter circuit IC2 are identical, it is made up of current/voltage-converted circuit U 4 and voltage/frequency change-over circuit U5, the input of U4 links to each other with the position feed back signal output terminal IV of electric actuator, the output of U4 connects the input of U5, and the output of U5 also links to each other with the input/output terminal of CPU.
5, by the described electric actuator intelligent operator of claim 1, it is characterized in that motor is just changeing driving circuit IC3 and including the buffer circuit of being made up of transistor T 4 and controllable silicon output optocoupler U7, by transistor T 3, rectifier bridge D7-D10, resistance R 30-R33, low-voltage trigger circuit that capacitor C 9 is formed and by bidirectional triode thyristor B1, capacitor C 7, C8, resistance R 28, the control circuit that R29 forms, the input of the base stage of transistor T 4 links to each other with the corresponding control output end of singlechip CPU in its buffer circuit, the collector output of T4 connects the input of controllable silicon output optocoupler U7, the output of U7 connects the base bias circuit of T3 in the low-voltage trigger circuit by R33, the collector of T3 connects the output control terminal of U7, the output of U7 links to each other with the output of rectifier bridge D7-D10 by R33 simultaneously, the input of D7-D10 respectively with control circuit in the end of bidirectional triode thyristor B1 link to each other with trigger end, the just commentaries on classics control end DINC and the common port COM of the two termination electric actuator of B1, line construction and the IC3 of reversing drive circuit IC4 are identical, it is also by the buffer circuit that is made of transistor T 6 and controllable silicon output optocoupler U8, low-voltage trigger circuit that constitute by transistor T 5 and rectifier bridge D12-D15 and form, just the counter-rotating control end DDEC and the common port COM of the two termination electric actuator of B2 by the control circuit that controllable silicon B2 constitutes.
6; by claim 1 or 5 described electric actuator intelligent operators; just it is characterized in that at singlechip CPU and motor; reversing drive circuit IC3; be connected between the IC4 by FPGA (Field Programmable Gate Array) integrated package U10; relay J; optocoupler U9; the safety protective circuit IC5 that U11 forms; its optocoupler U9; the input end of U11 respectively with just; reversing drive circuit IC3; the output terminal of IC4 be electric actuator just; counter-rotating control end DINC; DDEC and common port COM link to each other; U9; the output terminal of U11 links to each other with the input end of FPGA (Field Programmable Gate Array) integrated package U10; two control output ends of singlechip CPU link to each other with two input ends in addition of U10; the output terminal of U10 is by complex pipe T7; T8 links to each other with the coil of relay J, and the normally closed contact J1 of J just is being serially connected in motor; reversing drive circuit IC3; between the common port COM of IC4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96232375 CN2282213Y (en) | 1996-07-22 | 1996-07-22 | Intelligent operator for electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96232375 CN2282213Y (en) | 1996-07-22 | 1996-07-22 | Intelligent operator for electric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282213Y true CN2282213Y (en) | 1998-05-20 |
Family
ID=33909345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96232375 Expired - Fee Related CN2282213Y (en) | 1996-07-22 | 1996-07-22 | Intelligent operator for electric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282213Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738469A (en) * | 2016-08-26 | 2018-02-27 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of hydraulic press |
-
1996
- 1996-07-22 CN CN 96232375 patent/CN2282213Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738469A (en) * | 2016-08-26 | 2018-02-27 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of hydraulic press |
| CN107738469B (en) * | 2016-08-26 | 2019-10-25 | 唐山曹妃甸共进科技有限公司 | A kind of hydraulic press |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |