CN102183973A - Embedded proportional controller - Google Patents
Embedded proportional controller Download PDFInfo
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- CN102183973A CN102183973A CN 201110043064 CN201110043064A CN102183973A CN 102183973 A CN102183973 A CN 102183973A CN 201110043064 CN201110043064 CN 201110043064 CN 201110043064 A CN201110043064 A CN 201110043064A CN 102183973 A CN102183973 A CN 102183973A
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Abstract
The invention relates to an embedded proportional controller, which comprises a housing and a circuit board arranged therein. A circuit structure on the circuit board comprises an embedded microprocessor, a peripheral circuit connected with the embedded microprocessor, and a power supply module which supplies power for the embedded microprocessor and the peripheral circuit, wherein, the embedded microprocessor comprises an A/D converting unit, a memory and PWM output control unit, a digital quantity input and output unit, a logic control unit and an interface control unit, the peripheral circuit comprises an input signal conditioning circuit, a power amplification circuit, a display unit, a feedback indication circuit, an RS232 interface circuit, a keyboard entry circuit and a power supply module. An voltage input terminal and a current input terminal are connected with the A/D converting unit via the input signal conditioning circuit, the power amplification circuit is connected with the PWM output control unit, and the display circuit is connected with the digital quantity input and output unit. The embedded proportional controller is convenient in signal processing and strong in anti-interference capability, and can communicate with an upper computer. By the invention, only software parameters need to be changed corresponding to different proportioning valves, allowing no change to hardware circuit.
Description
Technical field
The present invention relates to a kind of proportional controller, be used for controlling and driving the device of various electro-hydraulic proportional valves, belong to technical field of hydraulic.
Background technology
Proportional controller is the control and the drive unit of electro-hydraulic proportional valve.Present existing proportional controller adopts mimic channel to form more, finishes the functions such as the adjusting of slope time, frequency adjustment, gain-adjusted and power amplification of control signal.But analog proportional controller all exists operation and regulates inconvenient, regulator potentiometer easy to wear and damage, data not readable can't be with other device communications, exist intrinsic temperature to float characteristic, be difficult to guarantee shortcomings such as control accuracy and reliability, and control function is single, in case after making, change function and must change circuit.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, and a kind of embedded formula proportional controller is provided, and reaches the purpose of high control accuracy, strong anti-interference ability, and have function easy to adjust, can carry out characteristics such as communication with other devices.
The present invention is achieved by the following technical solutions:
A kind of embedded proportional controller, comprise housing and be installed in the interior circuit board of housing, circuit structure on the circuit board is by an embedded microprocessor and the peripheral circuit that links to each other with embedded microprocessor and gives embedded microprocessor and power module that peripheral circuit is powered constitutes, and embedded microprocessor comprises an A/D converting unit, storer and PWM output control unit, digital quantity input-output unit, a logic control element and an interface control unit.Peripheral circuit comprises an input signal conditioning circuit, a power amplification circuit, a display circuit, a feedback indicating circuit, a RS232 interface circuit, a keyboard input circuit and a power module.Voltage input end links to each other with the A/D converting unit through the input signal conditioning circuit with current input terminal, and power amplification circuit links to each other with the PWM output control unit, and display circuit links to each other with the digital quantity input-output unit.
The PWM output control unit links to each other with power amplification circuit, and power amplification circuit directly drives electro-hydraulic proportional valve.Feedback circuit detects the working condition of electro-hydraulic proportional valve and links to each other with embedded microprocessor, and embedded microprocessor obtains to export to the PWM output control unit again after laggard line correlation processing of feedback signal and the budget.Tap into the light current pressure or the light current road input signal that come from back patch panel binding post and insert, through the A/D converting unit of input signal conditioning circuit conditioning back access embedded microprocessor from voltage input end and current input terminal.The A/D converting unit is converted into digital signal, embedded microprocessor carries out processing such as spool adjustment at zero point, the adjustment of slope time, flutter frequency adjustment and gain adjustment as required to these digital signals, amplify through power amplification circuit afterwards by the PWM modulation to drive electro-hydraulic proportional valve.
The present invention compared with prior art has following conspicuous outstanding substantive distinguishing features and remarkable advantage:
1, the present invention all adopts digital circuit to finish, and has guaranteed the control accuracy and the reliability of electro-hydraulic proportional valve compared with the prior art.
2, signal processing functions more of the present invention realize that by the program of revising in the reservoir dirigibility is strong.
3, the present invention adopts the signal Processing scheme of digital circuit convenient and antijamming capability is strong, and can adopt the cryptoguard technology, and customer parameter is safer.
4, the present invention can communicate with other devices, is convenient to Long-distance Control.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Fig. 2 is a workflow block diagram of the present invention.
Fig. 3 is preceding control panel figure of the present invention.
Fig. 4 is back patch panel figure of the present invention.
Fig. 5 is a three-dimensional perspective of the present invention.
Embodiment
The preferred embodiments of the present invention accompanying drawings is as follows:
Embodiment one:
Referring to Fig. 1 and Fig. 5, this embedded proportional controller, comprise housing and be installed in the interior circuit board of housing, circuit structure on the circuit board is by an embedded microprocessor and the peripheral circuit that links to each other with embedded microprocessor and gives embedded microprocessor and power module that peripheral circuit is powered constitutes, and embedded microprocessor comprises an A/D converting unit, storer and PWM output control unit, digital quantity input-output unit, a logic control element and an interface control unit.Peripheral circuit comprises an input signal conditioning circuit, a power amplification circuit, a display circuit, a feedback indicating circuit, a RS232 interface circuit, a keyboard input circuit and a power module.Voltage input end links to each other with the A/D converting unit through the input signal conditioning circuit with current input terminal, and power amplification circuit links to each other with the PWM output control unit, and display circuit links to each other with the digital quantity input-output unit.
Embodiment two:
Present embodiment and embodiment one are basic identical, and special feature is as follows:
Described voltage input end 10 links to each other with A/D converting unit 241 through input signal conditioning circuit 21 by U/U change-over circuit 19, described current input terminal 10 links to each other with A/D converting unit 241 by input signal conditioning circuit 21 through I/U change-over circuits 20, and described voltage input end 10 and current input terminal 11 and the housing 1 afterwards binding post 9 on the patch panel 8 link to each other.
Described display circuit 27 be installed in housing 1 before a charactron 5 on the control panel 3 link to each other.
The following word order of the preceding control panel 3 of described housing 1 is installed six adjusting knobs 4 and is linked to each other with circuit board 6.
Embodiment three:
This embedded proportional controller is a core with the embedded microprocessor as shown in Figure 1, and it comprises A/D converting unit, PWM output control unit, logic control element, digital quantity input-output unit, interface control unit, storer etc.Embedded proportional controller three-dimensional perspective as shown in Figure 6, embedded microprocessor and various peripheral circuit all are printed on the circuit board 6, circuit board 6 receives behind the voltage of binding post 9 inputs on the patch panel 8 of back or the current signal and to be converted to digital signal through input modulate circuit and A/D converting unit and to input to embedded microprocessor, also can directly digital signal be inputed to embedded microprocessor by peripheral keyboard input circuit, embedded microprocessor is regulated and is handled this digital signal: regulate comprising current closed-loop PID, zero-bit is regulated, the slope time is regulated, gain-adjusted and vibrating signal adjusting etc.Six knobs 4 of control panel 3 below word orders are respectively applied for the following amount of regulating before the housing 1: the slope rise time of signal, the slope fall time of signal, maximum current are set, minimum current is set, the frequency setting and the input signal of vibrating signal.Signal after handling and regulating is exported to power amplification circuit via the PWM output control unit, and power amplification circuit carries out connecting binding post 9 after the power amplification to pwm signal, and binding post 9 is connected with electro-hydraulic proportional valve.External power source 2 is housed in the housing 1, output 24V voltage after the 220V operating voltage of external power source 2 reception power interfaces 7, output terminal links to each other with power module on the circuit board 6 by lead.Digital quantity input-output unit on the embedded microprocessor links to each other with display circuit, and display circuit links to each other with charactron 5 on the preceding control panel 3, shows various output informations in real time.
Software flow pattern of the present invention as shown in Figure 2, after powering on, system at first embedded microprocessor is carried out initialization, then wait for user's input parameter, enter the PWM written-out program after confirming to receive the parameter success, system enters the sampling subroutine after output is arranged, and whether the difference of judging numerical value default in sampling numerical value and the program then is in error range, if do not exist, then enter the parameter adjustment program, respective input signals is carried out the PID closed loop adjustment until exporting in the accuracy requirement scope.
On the control panel 3, binding post 9, power interface 7 and RS232 interface 10 were installed on the patch panel 8 of back before contour structures of the present invention such as Fig. 3, Fig. 4, shown in Figure 5, button 4 and charactron 5 were installed in.Control panel 3 and back patch panel 8 are equipped with external power source 2 and circuit board 6 in the housing 1 before be equipped with respectively housing 1 front and back.
Claims (4)
1. embedded proportional controller, it is characterized in that comprising: housing (1) and be installed in circuit board (6) in the housing, it is characterized in that the circuit structure on the described circuit board (6) is by an embedded microprocessor (24) and the peripheral circuit that links to each other with embedded microprocessor (24) and gives embedded microprocessor and power module (18) formation of peripheral circuit power supply, described embedded microprocessor (24) comprises an A/D converting unit (241), storer and PWM output control unit (242), digital quantity input-output unit (244), a logic control element (243) and an interface control unit (245), described peripheral circuit comprises an input signal conditioning circuit (21), a power amplification circuit (25), a display circuit (27), a feedback indicating circuit (26), a RS232 interface circuit (23), a keyboard input circuit (22) and a power module (18), voltage input end (10) links to each other with A/D converting unit (241) through input signal conditioning circuit (21) with current input terminal (11), power amplification circuit (25) links to each other with PWM output control unit (242), and display circuit (27) links to each other with digital quantity input-output unit (244).
2. according to the described embedded proportional controller of claim 1, it is characterized in that: described voltage input end (10) links to each other with A/D converting unit (241) through input signal conditioning circuit (21) by U/U change-over circuit (19), described current input terminal (10) links to each other with A/D converting unit (241) by input signal conditioning circuit (21) through I/U change-over circuit (20), and described voltage input end (10) and current input terminal (11) and housing (1) the afterwards binding post (9) on the patch panel (8) link to each other.
3. according to the described embedded proportional controller of claim 1, the charactron (5) on it is characterized in that described display circuit (27) and being installed in the preceding control panel of housing (1) (3) links to each other.
4. according to the described embedded proportional controller of claim 1, it is characterized in that following word order six adjusting knobs of installation (4) of the preceding control panel (3) of described housing (1) link to each other with circuit board (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110043064 CN102183973A (en) | 2011-02-23 | 2011-02-23 | Embedded proportional controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110043064 CN102183973A (en) | 2011-02-23 | 2011-02-23 | Embedded proportional controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102183973A true CN102183973A (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110043064 Pending CN102183973A (en) | 2011-02-23 | 2011-02-23 | Embedded proportional controller |
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| CN (1) | CN102183973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818858A (en) * | 2016-09-14 | 2018-03-20 | 广州市合熠电子科技有限公司 | The multi-functional magnet steel rotary magnet double-direction control module of time control |
| CN111190376A (en) * | 2020-02-21 | 2020-05-22 | 山东省计算中心（国家超级计算济南中心） | Proportional valve driving circuit suitable for agricultural machinery ECU and control method |
| CN112255933A (en) * | 2020-09-11 | 2021-01-22 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
-
2011
- 2011-02-23 CN CN 201110043064 patent/CN102183973A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《第五届全国流体传动与控制学术会议暨2008年中国航空学会液压与气动学术会议》 20081231 姚磊等 《基于FPGA的电液比例控制器的设计》 1-4 , * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818858A (en) * | 2016-09-14 | 2018-03-20 | 广州市合熠电子科技有限公司 | The multi-functional magnet steel rotary magnet double-direction control module of time control |
| CN111190376A (en) * | 2020-02-21 | 2020-05-22 | 山东省计算中心（国家超级计算济南中心） | Proportional valve driving circuit suitable for agricultural machinery ECU and control method |
| CN112255933A (en) * | 2020-09-11 | 2021-01-22 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
| CN112255933B (en) * | 2020-09-11 | 2022-01-14 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
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Application publication date: 20110914 |