CN202257348U - Plug-type proportional amplifier - Google Patents
Plug-type proportional amplifier Download PDFInfo
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- CN202257348U CN202257348U CN2011203999866U CN201120399986U CN202257348U CN 202257348 U CN202257348 U CN 202257348U CN 2011203999866 U CN2011203999866 U CN 2011203999866U CN 201120399986 U CN201120399986 U CN 201120399986U CN 202257348 U CN202257348 U CN 202257348U
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Abstract
The utility model discloses a plug-type proportional amplifier, comprising: a microprocessor; a differential input module and a current feedback amplifier module which are electrically connected with the microprocessor respectively; a power output module connected with the microprocessor and the current feedback amplifier module respectively; and a power module electrically connected with the differential input module, the current feedback amplifier module and the microprocessor respectively. The plug-type proportional amplifier solves the problems of single function, low reliability and high cost in the prior art, and has the advantages of excellent performance, wide application range, control diversification, and the like.
Description
Technical field
The utility model belongs to the electronic control technology field, and is particularly related to a kind of plug-type proportional amplifier.
Background technology
In the prior art, electro-hydraulic proportional valve is widely used aspect Industry Control, for driving electro-hydraulic proportional valve, needs the light current control signal is proportionally zoomed into the curtage signal with certain power, and this function is accomplished by proportional amplifier usually.Occasion adopting microcomputer, Programmable Logic Controller and other digitial controllers to control also needs links such as D/A digital-to-analog conversion or PWM width modulation between controller and the amplifier.Digital-to-analog conversion and power amplification are accomplished respectively, and mainly are to be realized by active electronic device such as operational amplifier.The component number that this type Active Digital amplifier adopts is many, and reliability is not ideal enough, and price is higher.In many industrial applications; Also need adopt chopping mode; Proportioning valve is shared operation, only is operated on several amplitude different working points, and the requirement of pair amplifier is reliable, inexpensive; And can manually operate with mechanical, electrical easily, existing amplifier can not well satisfy the requirement of this respect.When electro-hydraulic proportional valve generation bite fault, available one significantly oscillating current get rid of, but existing proportional amplifier does not all directly possess this function.
And existing proportional amplifier mostly adopts mimic channel to form, and accomplishes like functions such as spool adjustment at zero point, the adjustment of slope time, gain adjustment and flutter frequency adjustment.And there is intrinsic temperature drift characteristic in analog device, when variation of ambient temperature, is difficult to guarantee the control accuracy and the reliability of electro-hydraulic proportional valve.In addition, after in a single day analog proportional amplifier was processed, function just was defined, and change function and must change circuit, and control function is single, and the antijamming capability of mimic channel is also relatively poor, signal Processing is complicated, and is also inconvenient with the communication of other devices.
The utility model content
The utility model is intended to solve in the prior art, and the proportional amplifier control function is single, and the antijamming capability of mimic channel is also relatively poor, signal Processing is complicated, with the technical matterss such as communication inconvenience of other devices.
In view of this, the utility model provides a kind of plug-type proportional amplifier, comprising: microprocessor; Difference load module and current feedback amplification module electrically connect with said microprocessor respectively; Power output module is connected with said microprocessor and current feedback amplification module respectively; Power module electrically connects with said difference load module, current feedback amplification module and said microprocessor respectively.
Further, said microprocessor comprises: D/A converter module; Signal compensation and PID computing module are connected with said D/A converter module; The PWM modulation module is connected with said signal compensation and PID computing module; Time base distribution module, respectively with said D/A converter module, signal compensation and PID computing module, and the PWM modulation module be connected; The fault diagnosis indicating module is connected said D/A converter module, signal compensation and PID computing module, reaches between the PWM modulation module.
Further, described plug-type proportional amplifier also comprises: the parameter adjustment potentiometer is connected with said D/A converter module.
Further, said power module comprises: the power protection module; The switch voltage-stabilizing module electrically connects with said power protection module; The linear voltage stabilization and the startup administration module that resets electrically connect with said switch voltage-stabilizing module.
Further, said power protection module comprises novel recover to insure device and transient state suppressing protection device.
Further, said switch voltage-stabilizing module comprises new-type miniaturization high frequency voltage descending formula Switching Power Supply integrated regulator and microminiature schottky diode and efficient chip inductor electric capacity.
Further, the said linear voltage stabilization and the startup administration module that resets are superminiature high-performance low pressure differential LDO voltage-stabilizing device.
Further, said difference load module is provided with an alternative parallelly connected current signal pull-up resistor at differential input end.
Further, the operational amplifier input end of said difference load module parallel connection schottky diode.
Further, said current feedback amplification module comprises single order RC filtering circuit.
Further, the shell of said plug-type proportional amplifier is Hirschmann (Hirschmann) GDME standard plug-in unit.
In sum, the plug-type proportional amplifier that the utility model provides has the following advantages compared to prior art:
1, all kinds of proportional pressure control valves, proportional pressure-reducing valve, proportional flow control valve, proportion directional valve that are applicable to belt spool not or pressure feedback etc. are applied widely;
2, adopt top standard's embedded digitalization software, the synthetic PWM Current Negative Three-Point Capacitance actuation techniques of numeral;
3, shell is Hirschmann (Hirschmann) GDME standard plug-in unit, and external form is dexterous, and sturdy and durable, barrier propterty is good;
4, the drive current maximum can reach 2.7A, and thermal value is little, and embedded algorithm has the maximum current limit defencive function;
5, anti-electromagnetic interference performance is excellent, is suitable for the on-the-spot application of control automatically of various bad working environments conditions;
6, factory preset PWM flutter frequency parameter, the built-in-potential device can be set bias current, gain, slope parameter, the control variation;
The digitizing LED diagnosis deixis that 7, can show strength of current, failure judgement state rapidly;
8, industrial standard 24VDC or 12VDC power supply, built-in fuse and the Transient Voltage Suppressor spare of recovering prevents chance failure.
Description of drawings
The functional module structure figure of the plug-type proportional amplifier that provides for the utility model one embodiment shown in Figure 1.
Embodiment
For letting the above-mentioned feature and advantage of the utility model can be more obviously understandable, hereinafter is special lifts exemplary embodiment, and conjunction with figs. 1, elaborates as follows.
The plug-type proportional amplifier that the utility model one embodiment provides, it comprises: microprocessor 100; Difference load module 200 and current feedback amplification module 300 electrically connect with said microprocessor 100 respectively; Power output module 400 is connected with said microprocessor 100 and current feedback amplification module 300 respectively; Power module 500 electrically connects with said difference load module 200, current feedback amplification module 300 and said microprocessor 100 respectively.
In the embodiment of the utility model, said microprocessor 100 comprises: D/A converter module 110; Signal compensation and PID computing module 120 are connected with said D/A converter module 110; PWM modulation module 130 is connected with said signal compensation and PID computing module 120; Time base distribution module 140, respectively with said D/A converter module 110, signal compensation and PID computing module 120, and PWM modulation module 130 be connected; Fault diagnosis indicating module 150, be connected said D/A converter module 110, signal compensation and PID computing module 120, and PWM modulation module 130 between.
In the embodiment of the utility model, parameter adjustment potentiometer P1, P2, P3 are connected with said D/A converter module.
In the embodiment of the utility model, said power module 500 comprises: power protection module 510; Switch voltage-stabilizing module 520 electrically connects with said power protection module 510; The linear voltage stabilization and the startup administration module 530 that resets electrically connect with said switch voltage-stabilizing module 520.
Below in conjunction with accompanying drawing 1, the running of the plug-type proportional amplifier that detailed description the utility model embodiment provides.
This plug-type proportional amplifier uses 24V industrial DC power standard voltage to insert, and is at first passed through the power protection module 510 of power module 500 by the power supply of outside input.
In the embodiment of the utility model, power protection module 510 comprises novel recover to insure device and transient state suppressing protection device.Transient state suppressing protection device can prevent the impact failure of the extraordinary voltage fluctuation of unexpected interference of DC power-supply system or fault generating to plug-type proportional amplifier circuit.
Novel heavy current when recovering to insure device and can prevent that plug-type proportional amplifier internal fault or external power source fault from causing the source current overrun causes the circuit burnout accident.
After power protection module 510, the 24V DC voltage will pass through switch voltage-stabilizing module 520 and power supply is stabilized in+5V voltage.
Because the volume of plug-type proportional amplifier is very small and exquisite, therefore this switch voltage-stabilizing module 520 has been proposed very harsh technical requirement: module groups becomes the device volume must be enough little, just can be installed in the extremely limited space; The thermal value that module when work produces must be enough little, in that have no can normal and stable work under the area of dissipation condition.
In order to have reached aforementioned requirement, in the embodiment of the utility model, switch voltage-stabilizing module 520 is made up of devices such as new-type miniaturization high frequency voltage descending formula Switching Power Supply integrated regulator and microminiature schottky diode and efficient chip inductor electric capacity.It is little and circuit reliability is high that voltage is stablized thermal value.+ 5V is that the analog amplify circuit of amplifier provides the power supply supply.
Power supply for the microprocessor 100 of the inner 32Bit of adaptive plug-type proportional amplifier; + 5V power supply also will pass through linear voltage stabilization and reset and start administration module 530 and further reduce little power consumption microprocessor 100 supply voltages of voltage stabilizings to+3.3V; And the startup reset signal management of 100 palpuses of microprocessor is provided, makes the microprocessor 100 electrifying startups more stable work that resets reliable.
In the embodiment of the utility model, the linear voltage stabilization and the startup administration module 530 that resets have been selected superminiature high-performance low pressure differential LDO voltage-stabilizing device for use, take into account the strict demand of thermal value and installation volume.
200 conditionings convert the analog signals that matees A/D conversion input range to the dummy instruction signal of outside input through the difference load module.
Because power module 500 can only provide+5V unipolarity power supply, in the embodiment of the utility model, a road of the difference input circuit of difference load module 200 employing a slice low-voltage single supply double operational as differential amplifier hereby.Be provided with an alternative parallelly connected current signal pull-up resistor at differential input end, as the function choosing-item of current mode input signal.
Be the mistake output that prevents that the input signal error-polarity connection from causing; In the embodiment of the utility model; Hereby at small-sized schottky diode of difference load module 200 operational amplifier input ends parallel connections as protection, general-purpose diode can not play the excellent protection effect because its forward conduction voltage drop is too high; And the conduction voltage drop of schottky diode is lower, and the short circuit input signal makes amplifier be output as zero effectively when the input signal error-polarity connection.
The current closed-loop of constant flow regulation characteristic drives the key property of function as the plug-type proportional amplifier, needs to use current feedback amplification module 300 that the weak voltage signal that produces on the output current sampling resistor is amplified to suitable voltage range and supplies the D/A converter module 110 of microprocessor 100 to gather.
Among the embodiment of the utility model, current feedback amplification module 300 adopts typical differential amplifier circuit, improves the amplification precision of feeble signal.
And in the embodiment of the utility model, the also subsidiary single order RC filtering circuit of current feedback amplification module 300 is used for the impulse disturbances that the PWM modulation module 130 of filtering microprocessor 100 produces, to improve the digital-to-analog conversion signal to noise ratio (S/N ratio).
In addition, in order to practice thrift the device erection space, in the embodiment of the utility model, other one tunnel of aforesaid low-voltage single supply double operational is to use as current feedback amplification module 300.
In the embodiment of the utility model, microprocessor 100 is little power consumption 32-bit microprocessor.Said D/A converter module 110, signal compensation and PID computing module 120, PWM modulation module 130, time base distribution module 140, and fault diagnosis indicating module 150 is the inner function module of microprocessor 100.
D/A converter module 110 is peripheral functionality modules that microprocessor 100 inside carry, and has 6 path 10 bit high-speed synchronous sampling A/D converter, can provide abundant resource to carry out the over-sampling data processing method, the mean value of accurate Calculation pulsation feedback current.
In the embodiment of the utility model, the analog signals of gathering three parameter adjustment potentiometer P1, P2, P3 simultaneously converts digital quantity to through D/A converter module 110 and carries out dead area compensation, gain control, three kinds of signal Processing computings of slope buffering.
Signal compensation and PID computing module 120 are microprocessor 100 kernel program software modules; Simulating signals such as input instruction signal, current feedback signal and parameter adjustment potentiometer P1, P2, P3 are digital quantity signal through D/A converter module 110 sample conversion; The controlled quentity controlled variable signal that produces; And through the thousands of inferior circular treatment of per second, Real-time and Dynamic refresh control amount signal.
Time base distribution module 140 is actually the basis of software framework of microprocessor 100 general procedure flow processs; Its vital role is a synchronous coordination D/A converter module 110; Signal compensation and PID computing module 120; The sequential of PWM modulation module 130 work has guaranteed the phase synchronism of each link signal Processing.
It is the microprocessor program software module that fault diagnosis indicating module 150 is one, is responsible for monitoring link process variable conversion in real time, and compares judgement with normal range, comes the state of display amplifier work operation through controlling two LED lights.
In the embodiment of the utility model, devices such as the power tube of selecting for use, fly-wheel diode, sampling resistor are high capacity, low conduction voltage drop, low resistance SMD device, have alleviated the contradictory problems of device heating and device installing space effectively.
In sum, the plug-type proportional amplifier that the utility model embodiment provides has the following advantages compared to prior art:
1, is applicable to all kinds of proportional pressure control valves, proportional pressure-reducing valve, proportional flow control valve, proportion directional valve etc. of belt spool not or pressure feedback; Can be directly installed on the ratio solenoid and use; The jack standard meets DIN43650, and the plug degree of protection is IP65, installation code DIN 40050; Connect the line cable, the scope of application is extensive.
2, adopt top standard's embedded digitalization software, the synthetic PWM Current Negative Three-Point Capacitance actuation techniques of numeral;
3, shell is Hirschmann (Hirschmann) GDME standard plug-in unit, and external form is dexterous, and sturdy and durable, barrier propterty is good;
4, the drive current maximum can reach 2.7A, and thermal value is little, and embedded algorithm has the maximum current limit defencive function;
5, anti-electromagnetic interference performance is excellent, is suitable for the on-the-spot application of control automatically of various bad working environments conditions;
6, factory preset PWM flutter frequency parameter, the built-in-potential device can be set bias current, gain, slope parameter, has realized the control variation;
The digitizing LED diagnosis deixis that 7, can show strength of current, failure judgement state rapidly;
8, industrial standard 24VDC or 12VDC power supply, built-in fuse and the Transient Voltage Suppressor spare of recovering prevents chance failure.
More than show and described the advantage of ultimate principle, principal character and the utility model of the utility model.Those skilled in the art should understand; The utility model is not restricted to the described embodiments; The just principle of describing in the foregoing description and the instructions of the utility model; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the scope of the utility model that requires protection.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (11)
1. a plug-type proportional amplifier is characterized in that, comprising:
Microprocessor;
Difference load module and current feedback amplification module electrically connect with said microprocessor respectively;
Power output module is connected with said microprocessor and current feedback amplification module respectively;
Power module electrically connects with said difference load module, current feedback amplification module and said microprocessor respectively.
2. plug-type proportional amplifier according to claim 1 is characterized in that, said microprocessor comprises:
D/A converter module;
Signal compensation and PID computing module are connected with said D/A converter module;
The PWM modulation module is connected with said signal compensation and PID computing module;
Time base distribution module, respectively with said D/A converter module, signal compensation and PID computing module, and the PWM modulation module be connected;
The fault diagnosis indicating module is connected said D/A converter module, signal compensation and PID computing module, reaches between the PWM modulation module.
3. plug-type proportional amplifier according to claim 2 is characterized in that, also comprises: the parameter adjustment potentiometer is connected with said D/A converter module.
4. plug-type proportional amplifier according to claim 1 is characterized in that, said power module comprises:
The power protection module;
The switch voltage-stabilizing module electrically connects with said power protection module;
The linear voltage stabilization and the startup administration module that resets electrically connect with said switch voltage-stabilizing module.
5. plug-type proportional amplifier according to claim 4 is characterized in that, said power protection module comprises novel recover to insure device and transient state suppressing protection device.
6. plug-type proportional amplifier according to claim 4 is characterized in that, said switch voltage-stabilizing module comprises new-type miniaturization high frequency voltage descending formula Switching Power Supply integrated regulator and microminiature schottky diode and efficient chip inductor electric capacity.
7. plug-type proportional amplifier according to claim 4 is characterized in that, the said linear voltage stabilization and the startup administration module that resets are superminiature high-performance low pressure differential LDO voltage-stabilizing device.
8. plug-type proportional amplifier according to claim 1 is characterized in that, said difference load module is provided with an alternative parallelly connected current signal pull-up resistor at differential input end.
9. plug-type proportional amplifier according to claim 8 is characterized in that, the operational amplifier input end parallel connection schottky diode of said difference load module.
10. plug-type proportional amplifier according to claim 1 is characterized in that, said current feedback amplification module comprises single order RC filtering circuit.
11. plug-type proportional amplifier according to claim 1 is characterized in that, the shell of said plug-type proportional amplifier is a Hirschmann GDME standard plug-in unit form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203999866U CN202257348U (en) | 2011-10-19 | 2011-10-19 | Plug-type proportional amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203999866U CN202257348U (en) | 2011-10-19 | 2011-10-19 | Plug-type proportional amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN202257348U true CN202257348U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203999866U Expired - Fee Related CN202257348U (en) | 2011-10-19 | 2011-10-19 | Plug-type proportional amplifier |
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| CN (1) | CN202257348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399671A (en) * | 2020-12-08 | 2021-02-23 | 中山市优胜电子科技有限公司 | PWM pulse width voltage constant current circuit |
-
2011
- 2011-10-19 CN CN2011203999866U patent/CN202257348U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399671A (en) * | 2020-12-08 | 2021-02-23 | 中山市优胜电子科技有限公司 | PWM pulse width voltage constant current circuit |
| CN112399671B (en) * | 2020-12-08 | 2024-05-31 | 中山市优胜电子科技有限公司 | PWM pulse width voltage constant current circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Tianxun Intelligent Technology Co.,Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141019 |
|
| EXPY | Termination of patent right or utility model |