CN206331262U - Proportional amplifier - Google Patents
Proportional amplifier Download PDFInfo
- Publication number
- CN206331262U CN206331262U CN201720031517.6U CN201720031517U CN206331262U CN 206331262 U CN206331262 U CN 206331262U CN 201720031517 U CN201720031517 U CN 201720031517U CN 206331262 U CN206331262 U CN 206331262U
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- module
- circuit
- proportional amplifier
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- signal
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Abstract
The utility model discloses a kind of proportional amplifier.The proportional amplifier includes printed circuit board (PCB) and the input interface for being integrated in the printed circuit board (PCB) and being sequentially connected, signal processing circuit, adjuster, power driver module, measuring and amplifying module and for the input interface, signal processing circuit, adjuster, power driver module, the power circuit of measuring and amplifying module for power supply, the signal processing circuit includes initial current setting module and slope adjusting module, and the measuring and amplifying module includes oscillator and demodulator.The proportional amplifier that the utility model is provided has that structure design is simple, board layout rationally, cooling electronic component performance is good, it is convenient to repair, reduce potential safety hazard.
Description
Technical field
The utility model is related to a kind of single channel Proportional Amplifer of having electronic feedback, especially, is related to a kind of ratio
Amplifier.
Background technology
Proportional amplifier is the important component of the ratio control system of proportion magnetic valve, and its function is comparative example electromagnetism
Valve provides the electric current of particular characteristic so that filled by the electronics controlled the flow or proportional pressure of proportion magnetic valve output
Put.
The proportional amplifier of prior art has that complex structural designs, board layout be unreasonable, cooling electronic component
Poor performance, inconvenient maintenance, there are the problems such as potential safety hazard.
Utility model content
In order to solve the technical problem of aforementioned proportion amplifier, the utility model provides a kind of proportional amplifier.
The proportional amplifier that the utility model is provided includes printed circuit board (PCB) and is integrated in the printed circuit board (PCB) and successively
The input interface of connection, signal processing circuit, adjuster, power driver module, measuring and amplifying module and for the input interface,
Signal processing circuit, adjuster, power driver module, the power circuit of measuring and amplifying module for power supply, the signal processing circuit
Including initial current setting module and slope adjusting module, the measuring and amplifying module includes oscillator and demodulator.
It is preferred that, connect also including the proportion electro-magnet that is connected with the power driver module and with the measuring and amplifying module
The displacement transducer connect.
It is preferred that, the power circuit includes capacitive filter, series voltage regulator and list-dual power supply translation circuit.
It is preferred that, the input interface includes two setting value input interfaces, the Differential Input mouthful with difference transport and placing device.
It is preferred that, the adjuster is PID regulator, and P mainly completes gain-adjusted, I- differential regulation main output signal
Increase with timeline shape, D- integral adjustments mainly play output signal and can responded with the rate of change of input.
It is preferred that, the power driver module includes the amplification of the descending hysteresis comparator of amplifier and two triode compositions
Device, pure oscillation signal is changed into the square wave of changeable frequency through descending hysteresis comparator, and the square wave enters through triode amplifier
Row Current amplifier, with the mode for changing frequency, adjusts output voltage/electric current, to control ratio work of electromagnet.
It is preferred that, the measuring and amplifying module includes oscillating circuit, demodulator circuit and displacement sensor.
It is preferred that, also including malfunction monitoring alarm module, the malfunction monitoring alarm module includes being used to detect electromagnet
Driving cable and displacement transducer cable simultaneously constitute level determiner by transport and placing device and constitute alarm with triode and LED light
Circuit.
It is preferred that, the printed circuit board (PCB) is 100X160mm veneer, and the interface card of the input interface is placed in electricity
On the plate of road, it can directly patch and use with the double pin connector of 32 line of European standard 16 with whole machine.
Compared to prior art, the proportional amplifier that the utility model is provided has the advantages that：
1st, the proportional amplifier that the utility model is provided have that structure design is simple, board layout rationally, electronics member device
Part perfect heat-dissipating, repair it is convenient, reduce potential safety hazard.
2nd, with power supply steady state process function, the supply voltage (19~35V) of input is changed into ± 9V；
3rd, there is control signal setting value to input (2 tunnel) and Differential Input (1 tunnel) two ways；
4th, with internal, exterior ramp handoff functionality and slope excision function；
5th, raising and lowering ramp time can be adjusted independently, and adjusting range is 0.03s~5s；
6th, modulation /demodulation displacement transducer signal, exports valve element actual displacement measured value；
7th, power current amplification is carried out to control signal using pulsewidth modulation (PWM) mode, driving electricity is provided to electromagnet
Stream；
8th, the spool position signal of displacement sensor is gathered, the control signal with input forms PID closed-loop controls；
9th, with electromagnet and sensor open circuit detection, instruction warning function；
10th, with output overcurrent short-circuit protection function.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment, made in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present utility model,
For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings
Other accompanying drawings, wherein：
Fig. 1 is the structured flowchart for the proportional amplifier that the utility model is provided；
Fig. 2 is the circuit structure diagram of proportional amplifier shown in Fig. 1；
Fig. 3 is the structure chart of power circuit；
Fig. 4 is the circuit structure diagram of input interface；
Fig. 5 is the structure chart of signal processing circuit；
Fig. 6 is the circuit structure diagram of adjuster；
Fig. 7 is the circuit structure diagram of power driver module；
Fig. 8 is the circuit structure diagram of measuring and amplifying module；
Fig. 9 is the circuit structure diagram of malfunction monitoring alarm module.
Embodiment
The technical scheme in the utility model embodiment will be clearly and completely described below, it is clear that described
Embodiment is only a part of embodiment of the present utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
Fig. 1 and Fig. 2 are please referred to, the utility model, which discloses a kind of proportional amplifier 100, includes printed circuit board (PCB) and collection
Printed circuit board (PCB) described in Cheng Yu and be sequentially connected input interface 1, signal processing circuit 2, adjuster 3, power driver module 4,
Measuring and amplifying module 5 and for the input interface 1, signal processing circuit 2, adjuster 3, power driver module 4, measuring and amplifying mould
The power circuit 6 that block 5 is powered.
The signal processing circuit 2 includes initial current setting module 21 and slope adjusting module 22, the measuring and amplifying
Module 5 includes oscillator 51 and demodulator 52.
The proportional amplifier 100 also includes and the power driver module 4 is connected proportion electro-magnet 7 and surveyed with described
Measure the displacement transducer 8 that amplification module 5 is connected.
Referring to Fig. 3, the power circuit 6 includes capacitive filter, series voltage regulator and list-dual power supply conversion electricity
Road.
The power circuit 6 inputs 24VDC, and operating voltage range is 19~35VDC, output ± 9VDc voltage sources, by electricity
Just, negative value, diode and fuse form wrong level protection and short-circuit protection, export stable ± 9VDC electricity for position device P6 regulations
Pressure.
Referring to Fig. 4, the input interface 1 is defeated including two setting value input interfaces, the difference with difference transport and placing device
Entrance.
Specifically, two setting value input interfaces, reference potential one is 9VDC, and another is 6VDC, plays command value pre-
Choosing obtains the effect of variable voltage, can be divided into the pre-selection of built-in command value and external command value preselects two ways；The difference amplifier
Device is responsible for the input of the control signal beyond proportional amplifier.
Referring to Fig. 5, the signal processing circuit 2 includes initial current setting module 21 and slope adjusting module 22, institute
State slope adjusting module and slope modulation treatment is carried out to control signal, in order to avoid input control signal Spline smoothing causes execution
Mutation.The initial current setting module 21 is setting proportioning valve mainly for generation of the pre- exciting curent of proportion electro-magnet 7
Definite value starts rapidly when inputting from original position.
Specifically, the step control signal of input is transformed into a slope by the ramp generator of the slope adjusting module
Output signal, the time of raising and lowering, P2 was adjusted by potentiometer P1, scope of its ramp time in 0.03s~5s
Interior change.Potentiometer P5 initial currents are set.
Referring to Fig. 6, the adjuster 3 is a component units in electrical feedback proportional amplifier, its function is improvement
The stable state and dynamic quality of feedback closed loop control proportioning valve；Control proportioning valve is set to reach certain control accuracy；There is suppression to interference
Make and use, be that dynamic is improved.
The adjuster 3 is PID regulator, and P mainly completes gain-adjusted, and I- differential adjusts main output signal with the time
Linear growth, D- integral adjustments mainly play output signal and can responded with the rate of change of input.
Foregoing circuit structure is also a pressure-frequency oscillator circuit simultaneously, changes input direct-current signal magnitude, then exports just
String frequency of oscillation changes therewith.
The output signal of ramp generator is transferred to PID regulator as setting signal, is carried out with feedback (displacement) signal
It is comprehensive, constitute a close loop control circuit.
The power driver module 4 is used to change pulse width mode to adjust output voltage/electric current.The PID regulations
Device is transmitted to the input of oscillator 51 according to the size of setting value and actual deviation, finally by the power driver module 4
The electric current of power amplifier output controls electromagnet.Due to inductance effect, the electric current on coil is set to be changed into small breadth discharge and recharge
The direct current signal of the AC signal of superposition, plays flutter effect (eliminating the rubbing of electromagnet, stagnant ring), therefore pulse width modulation frequency
It is also flutter frequency, saves special flutter circuit.
The amplification that the circuit of the power driver module 4 is made up of a descending hysteresis comparator of amplifier and two triodes
Device is constituted.Pure oscillation signal is changed into the square wave of changeable frequency through descending hysteresis comparator, and the square wave amplifies through triode
Device carries out Current amplifier.With the mode for changing frequency, output voltage/electric current is adjusted, to control work of electromagnet.R11 collection electricity
Output short-circuit overcurrent protection is realized in stream negative-feedback.
Referring to Fig. 8, the measuring and amplifying module 5 includes oscillating circuit, demodulator circuit and displacement sensor.
Specifically, the sinusoidal signal of 2.5KHz frequencies is produced by 8038 oscillators 51, the primary line of input displacement sensor 8
Circle, the displacement signal is exported by induction coil secondary, and output amplitude is adjusted by potentiometer P4.Because the signal of output is a friendship
Varying signal, control circuit is it is desirable that alternating signal is changed into direct current signal by a direct current signal, demodulator circuit.Sensitivity is by electricity
Position device P3 regulations, pulsating direct current fluctuating signal feeding PID regulator circuit and setting control signal formation closed loop control after demodulation
Loop processed.
Oscillating circuit is constituted with 8038 Function generators.Demodulator circuit is made up of discrete components such as FETs.
Referring to Fig. 9, also including malfunction monitoring alarm module, the malfunction monitoring alarm module includes being used to detect electromagnetism
Iron drives cable and the cable of displacement transducer 8 and is constituted level determiner by transport and placing device and constituted with triode and LED light
Warning circuit；Fault Identification device circuit detects the cable of solenoid actuated cable and displacement transducer 8 at any time, once it is broken
Or overload, level identification circuit, which exports an electric signal, makes LED alarm lamp bright.The circuit constitutes level determiner by transport and placing device,
With the detection of complete paired fault, warning circuit is constituted with triode and LED light.
In the present embodiment, the printed circuit board (PCB) is 100X160mm veneer, the interface card of the input interface 1
It is placed on circuit board, can directly patches and use with the double pin connector of 32 line of European standard 16 with whole machine.
The main development index of proportional amplifier is as follows：
Proportional amplifier plate uses plate card type structure
Environmental condition：
A. temperature
Product should in 0~50 DEG C of temperature range normal work；
B. humidity
Product should be able in the environment of relative humidity≤95% (+25 DEG C) normal work；
Fuse：
Fuse setting electric current is 2.5A；
Supply voltage：
Direct current 24VDC, higher limit 35V, lower limit 19V
Power consumption ＜ 45VA；
Electric current of the proportional amplifier plate in the case of without load is not more than 60mA；
Control signal：
A. setting value input 1：0~9V
B. setting value input 2：0~6V
C. Differential Input：0~10V
Exterior ramp shutoff signal：
8.5V~24VDC can block system relay slope, relay input impedance Ri ＞ 100K Ω
Slope adjustment time：
Slope adjustment time scope is：0.03~5S
Non-linear：
Non-linear ＜ 2% of the input signal to output signal of displacement；
Output driving current：
Maximum drive current 1.8A ± 20% (Ω of load resistance 5.4)；
VT5003 maximum drive currents 2.2A ± 20% (Ω of load resistance 10)；
Displacement transducer pumping signal：
The sine wave of 2.5KHz ± 20%, its waveform is that the distortion factor is not more than 2%, the little 5V of voltage effective value.
Valve element actual position signal：0~-6V；
Temperature drift：
To null drift amount output ＜ 0.05%/DEG C；
Interface requirement：
Amplification board is connected by the double pin connector of the line of European standard 32 (5.08 × 5.08mm) 16 with external equipment to be met
DIN41 612, D-shaped, wherein：
Control signal input interface：
9V setting values are inputted:26c
6V setting values are inputted:24a
Differential Input：24c (reference voltage) and 22a (10V)
Power input interface：6ac (24V) and 10ac (0V)
Slope is cut off:28a
Exterior ramp:30c and 32c
Setting value is exported:28c
Actual value is exported:32a
Sensor interface：22c, 20c and 14c
Electromagnet interface:2ac and 4ac
Structure design：DIN41 494 is met using the design of external perimysium reference whole plate, board size 100X160mm is printed, outside can
With mounting bracket.
The proportional amplifier is VT5001 proportional amplifiers, and as the core control element of proportioning valve, its reliability is straight
Connect the Hydraulic System Reliability for being related to adoption rate valve as control element.To meet product reliability requirement, adopted in design
Take following measures：
The layout of wiring board
According to circuit function and device characteristics, by wiring board according to module placement；Few wiring as far as possible around high power device
And mask placement device；The signal being connected with external equipment is concentrated on into the double socket of 16 pins, it is ensured that the transmitting of signal；Limited
Wiring board area on, thicker signal lead is drawn as far as possible；
Electronic component
The electronic component used in VT5001 proportional amplifiers meets industrial level；High power device installs radiating additional
Piece；
Capability of maintenance design
Proportional amplifier is connected with external equipment by the double pin connector of 32 line of European standard 16, and repair and replacement are convenient.
Safety Design
VT5001 proportional amplifiers are connected with the electromagnet of 4WRE6 type proportional direction valves by two leads, amplifier sheet
Body has electromagnet and sensor open circuit detection and warning function, ensure that the normal work of proportioning valve.
Electromagnetic Compatibility Design
When VT5001 proportional amplifiers are designed, from the electrical equipment of strong antijamming capability, EMC is met
It is required that.VT5001 proportional amplifiers as proportioning valve core control element, its reliability be directly connected to adoption rate valve work
For the Hydraulic System Reliability of control element.To meet product reliability requirement, following measures are taken in design：
In order to be better understood from above-described embodiment, the invention also discloses a kind of method of work of proportional amplifier,
Using above-mentioned proportional amplifier, comprise the following steps:
Outside 0~9V step control signals are entered into the signal processing circuit 2, step signal through the input interface 1
After being adjusted through the slope adjusting module, the adjuster is sent into；
The adjuster has excited oscillation and PID control effect, and the driving source of institute's displacement sensors 8 is put by the measurement
The sine-wave oscillator 51 of big module 5 is completed, and the oscillator 51 sends pumping signal excitation vibration-starting, the control signal of input with
Displacement Feedback signal carries out integrated treatment, and control signal size can change its frequency of oscillation；
Oscillation control signal through comprehensive modulation, into the pulse-width modulation type power amplification electricity of the power driver module 4
Road carries out Current amplifier, last export ratio electromagnet 7；The demodulator circuit of demodulated device 52 exports the reality of direct current displacement simultaneously
Border measurement signal.
Compared to prior art, the proportional amplifier that the utility model is provided has the advantages that：
1st, with power supply steady state process function, the supply voltage (19~35V) of input is changed into ± 9V；
2nd, there is control signal setting value to input (2 tunnel) and Differential Input (1 tunnel) two ways；
3rd, with internal, exterior ramp handoff functionality and slope excision function；
4th, raising and lowering ramp time can be adjusted independently, and adjusting range is 0.03s~5s；
5th, modulation /demodulation displacement transducer signal, exports valve element actual displacement measured value；
6th, power current amplification is carried out to control signal using pulsewidth modulation (PWM) mode, driving electricity is provided to electromagnet
Stream；
7th, the spool position signal of displacement sensor is gathered, the control signal with input forms PID closed-loop controls；
8th, with electromagnet and sensor open circuit detection, instruction warning function；
9th, with output overcurrent short-circuit protection function.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model description, or directly or indirectly it is used in other phases
The technical field of pass, is similarly included within scope of patent protection of the present utility model.
Claims (9)
1. a kind of proportional amplifier, it is characterised in that including printed circuit board (PCB) and be integrated in the printed circuit board (PCB) and connect successively
The input interface that connects, signal processing circuit, adjuster, power driver module, measuring and amplifying module and be the input interface, letter
Number process circuit, adjuster, power driver module, the power circuit of measuring and amplifying module for power supply, the signal processing circuit bag
Initial current setting module and slope adjusting module are included, the measuring and amplifying module includes oscillator and demodulator.
2. proportional amplifier according to claim 1, it is characterised in that also including being connected with the power driver module
Proportion electro-magnet and the displacement transducer connected with the measuring and amplifying module.
3. proportional amplifier according to claim 1, it is characterised in that the power circuit includes capacitive filter, string
Connection type voltage-stablizer and list-dual power supply translation circuit.
4. proportional amplifier according to claim 1, it is characterised in that the input interface includes two setting value inputs
Interface, the Differential Input mouthful with difference transport and placing device.
5. proportional amplifier according to claim 1, it is characterised in that the adjuster is PID regulator, P is mainly complete
Into gain-adjusted, I- differential adjusts main output signal and increased with timeline shape, and D- integral adjustments mainly play output signal can be with
The rate of change response of input.
6. proportional amplifier according to claim 1, it is characterised in that the power driver module includes the retardation of walking under amplifier
The amplifier of stagnant comparator and two triode compositions, pure oscillation signal is changed into changeable frequency through descending hysteresis comparator
Square wave, the square wave carries out Current amplifier through triode amplifier, with the mode for changing frequency, adjusts output voltage/electric current,
To control ratio work of electromagnet.
7. proportional amplifier according to claim 1, it is characterised in that the measuring and amplifying module include oscillating circuit,
Demodulator circuit and displacement sensor.
8. proportional amplifier according to claim 1, it is characterised in that also including malfunction monitoring alarm module, the event
Barrier monitoring, alarming module includes being used to detect solenoid actuated cable and displacement transducer cable and level knowledge is made up of transport and placing device
Other device and constitute warning circuit with triode and LED light.
9. proportional amplifier according to claim 1, it is characterised in that the printed circuit board (PCB) is 100X160mm list
Plate, the interface card of the input interface is placed on circuit board, can directly be connect with whole machine with the double pin of 32 line of European standard 16
Plug-in unit, which is patched, to be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031517.6U CN206331262U (en) | 2017-01-11 | 2017-01-11 | Proportional amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031517.6U CN206331262U (en) | 2017-01-11 | 2017-01-11 | Proportional amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206331262U true CN206331262U (en) | 2017-07-14 |
Family
ID=59294404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720031517.6U Withdrawn - After Issue CN206331262U (en) | 2017-01-11 | 2017-01-11 | Proportional amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206331262U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842902A (en) * | 2017-01-11 | 2017-06-13 | 宝鸡文理学院 | Proportional amplifier and its method of work |
| CN115963744A (en) * | 2021-10-15 | 2023-04-14 | 天津一重电气自动化有限公司 | Circuit system of large-current proportional valve control device |
-
2017
- 2017-01-11 CN CN201720031517.6U patent/CN206331262U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842902A (en) * | 2017-01-11 | 2017-06-13 | 宝鸡文理学院 | Proportional amplifier and its method of work |
| CN106842902B (en) * | 2017-01-11 | 2023-05-05 | 宝鸡文理学院 | Proportional amplifier and working method thereof |
| CN115963744A (en) * | 2021-10-15 | 2023-04-14 | 天津一重电气自动化有限公司 | Circuit system of large-current proportional valve control device |
| CN115963744B (en) * | 2021-10-15 | 2024-05-14 | 天津一重电气自动化有限公司 | Circuit system of control device of high-current proportional valve |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170714 Effective date of abandoning: 20230505 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170714 Effective date of abandoning: 20230505 |