CN201984672U - Open automatic control comprehensive design experiment system - Google Patents

Abstract

An open automatic control comprehensive design experiment system includes a simulation experiment device, a data transmission module and a computer; the simulation experiment device is an open box structure, the outermost layer is a box body, and the inner layer is a core circuit board. Several typical link circuit modules are arranged on the core circuit board. The link circuit modules adopt integrated circuit chips and are equipped with input terminals and output terminals. They can be freely combined with each other to construct various control systems. The simulation experiment device The frontmost layer is a transparent display panel; the computer stores comprehensive analysis and design software; the data transmission module is respectively connected with the simulation experiment device and the computer, and is composed of a data acquisition card and an input and output data interface board. The utility model has the advantages of simple and universal structure, high reliability, wide application range of experiments, strong data processing ability and high efficiency, and can provide practical tools for students to complete experimental courses, independently innovate experimental design and develop automatic control systems.

Description

Open automatic control comprehensive Design experimental system

Technical field:

The utility model relates to a kind of experimental teaching equipment, is specifically related to a kind of open automatic control comprehensive Design experimental system that is used for engineering and polytechnic universities' specialty control course experiment teaching.

Background technology:

Experimental teaching is an important step indispensable in the school instruction, and is especially even more important in the teaching of the Specialty Design course of engineering and polytechnic universities, and the quality of supporting with it experimental teaching equipment has very big influence to the effect of experimental teaching.

In the automatic control professional teaching apparatus field of common industry science institution of higher learning (containing higher vocational college), in recent years, " the automation-control experiment device " that the many universities and colleges in the whole nation adopt each teaching instrument and equipment company to produce, the most of discrete component of amplifier mimic channel that adopts of these experimental provisions is constructed a whole set of hardware unit, and only be equipped with can the output record curve simple software, therefore present experimental system generally all has following limitation:

1, the wiring of when operation is more numerous and diverse, and the experimenter will spend more time and efforts aspect connecting circuit, and conventional efficient is lower, and the time can not be absorbed in the experimental study of Theory of Automatic Control itself.

2, the circuit reliability of discrete element structure is relatively poor, and slight error tends to cause the failure of experiment in the wiring.

3, device port single, do not possess versatility, experiment can only be confined to the content that device itself is provided, research range is narrower, is unfavorable for the expansion of experimental subjects.

4, the subsidiary software interface of equipment is simple, function is limited, and DATA REASONING limits if having time, is not suitable for long playing experiment, and the historical data curve can not completely keep.

5, the device data processing power is relatively poor, and the researchist can not independently determine and change related experiment option according to experiment purpose, not support design and exploitation from master project.

The utility model content:

Technical problem to be solved in the utility model is the deficiency that overcomes existing automation-control experiment device, a kind of open automatic control comprehensive Design experimental system is provided, it adopts the structure of combination and transparent outward appearance, simultaneously in conjunction with computer application, have simple in structure, reliability is high, applied widely, advantage that efficient is high.

For solving above-mentioned technical matters, the utility model adopts following technical scheme:

A kind of open automatic control comprehensive Design experimental system, it includes analogue experiment installation, data transmitting module and computing machine; Described analogue experiment installation is open case structure, its outermost layer is a casing, internal layer is the core circuit plate, the front of this core circuit plate is printed on circuit theory diagrams, be arranged with some typical link circuit modules above, its reverse side is provided with pcb board, numeral variable rheostat and digital transfiguration case, these some link circuit modules adopt integrated circuit (IC) chip and are equipped with input end and output terminal, each link circuit module can be by connecting the mutual independent assortment of this input end and output terminal to construct various control system, the anterior layer of this analogue experiment installation is a display panel, it adopts transparent organic glass to make, it is corresponding with each link circuit module to engrave the figure of described each link circuit module and transport function literal thereof and position above, and described display panel is provided with "+" that is connected with digital transfiguration case with described digital variable rheostat, "-" button and nixie display; Described computer stored has the analysis-by-synthesis design software; Described data transmitting module is connected with computing machine with described analogue experiment installation respectively, it is made up of data collecting card and inputoutput data interface board, this data collecting card is installed in the PCI slot of computing machine, it comprises A/D converter, D/A converter, conventional data communication module, metadata cache expansion module, interface control logic circuit and power circuit, this inputoutput data interface board and data acquisition card connection.

Open automatic control comprehensive Design experimental system described in the utility model, its described some link circuit modules include proportional component circuit module, integral element circuit module, proportional integral link circuit module, inertial element circuit module, differentiation element circuit module, proportion differential link circuit module, proportion integration differentiation link circuit module, second order oscillation element circuit module and comparing element circuit module; The integrated circuit (IC) chip of this link circuit module is LM324; Described data collecting card adopts PCI8320, and described A/D converter is ADC0809, and described D/A converter is DAC0832; Described comprehensive Design experimental system also includes temperature controlling stove thermostatic control module, this temperature controlling stove thermostatic control module is made up of two parts, first comprises electric furnace heating wire, temperature sensor thermistor and the signal amplification circuit of controlled device electrothermal furnace, and second portion comprises controllable silicon and phase shift trigger pulse circuit thereof; Described comprehensive Design experimental system also includes the electric machine speed regulation control module, this electric machine speed regulation control module is made up of two parts, first comprises controlled direct current generator, speed detector and direct supply, and second portion comprises sensor signal shaping, control voltage power amplifying circuit.

The beneficial effect of open automatic control comprehensive Design experimental system described in the utility model is:

1, experimental subjects is applied widely---and core circuit plate of the present utility model is provided with a plurality of typical link circuit modules, can freely form various control system according to user's needs as experimental subjects, general in addition input end and output terminal, digital variable rheostat and digital transfiguration case that numerical value is adjustable all are that this independent assortment of realization has been created structural advantage, and therefore described open automatic control comprehensive Design experimental system has highly versatile, experiment is applied widely and support the advantage that autonomous Design is developed.

2, data-handling capacity is strong---and the utility model adopts computing machine to finish data processing, analyze and control in real time, be used in combination two kinds of softwares of LabVIEW and MATLAB, both given full play to the stronger real-time data acquisition of LabVIEW, test, analyze, the function of handling and preserving, again by MATLAB superpower systematic analysis and design of Simulation function, make the researcher can realize the unification of simulation algorithm and working control better, promote the efficient of experimental system, it is directly perceived to have given full play to computer interface simultaneously, historical measurement data keeps complete sum and is fit to long playing characteristics, thus described open automatic control comprehensive Design experimental system to have data-handling capacity strong, the advantage that efficient is high.

3, system works is reliable---and the utility model has adopted module combined type structure and unified data-interface, and therefore greatly limit has been avoided the error of people for wiring, has improved the reliability of described open automatic control comprehensive Design experimental system greatly.

In a word, open automatic control comprehensive Design experimental system described in the utility model have simple in structure general, reliability is high, experiment is applied widely, data-handling capacity is strong and the advantage of high efficiency.Described open automatic control comprehensive Design experimental system is not only finished " Automatic Control Theory serial experiment " for the student of the relevant specialty of institution of higher learning, " Computer Control Technology serial experiment ", " LabVIEW experiment ", " control system MATLAB emulation experiment ", " control is system experimentation automatically ", " system modelling and System Discrimination experiment ", " automatic control system Course Exercise ", courses such as " graduation projects ", the identification and the various advanced algorithm of research control system provide a good experiment porch and environment, and can provide instrument of great practical value for relevant technologies personnel autonomous innovation experimental design and exploitation automatic control system.

Description of drawings:

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is a core circuit plate synoptic diagram.

Fig. 3 is the display panel synoptic diagram.

Fig. 4 is that computer generalization is analyzed the design software block diagram.

Fig. 5 is the data transmitting module structural representation.

Fig. 6 is the circuit theory diagrams of temperature controlling stove thermostatic control module.

Fig. 7 is the circuit theory diagrams of electric machine speed regulation control module.

Embodiment:

Now with accompanying drawing the utility model is elaborated in conjunction with specific embodiments.

See also Fig. 1 structural representation of the present utility model, illustrate open automatic control comprehensive Design experimental system and comprise analogue experiment installation, data transmitting module, temperature controlling stove thermostatic control module, electric machine speed regulation control module and computing machine.

Described analogue experiment installation is open case structure, and it has three layers: outermost layer is a casing, and its tank wall is provided with power switch, power source conversion interface, data transfer interface etc.; The internal layer of this analogue experiment installation is the core circuit plate, be arranged with some typical link circuit modules above, referring to Fig. 2, these some link circuit modules include proportional component, integral element, the proportional integral link, inertial element, differentiation element, the proportion differential link, the proportion integration differentiation link, second order oscillation element and comparing element, these some link circuit modules adopt integrated circuit (IC) chip, the element of its pcb board and welding is arranged at the reverse side of described core circuit plate, this element comprises digital variable rheostat and digital transfiguration case, the front of described core circuit plate is printed on circuit theory diagrams, each link circuit module is equipped with input end and output terminal, thereby can be by connecting this input end and the mutual independent assortment of output terminal, to construct the simulation link and the control system of various types and order, simulation modelling and the signal of realizing control system obtain, for the performance evaluation of automatic control system and the exploitation of correcting controller provide the experimental study basis; Foremost one deck of described analogue experiment installation is a display panel, see Fig. 3, it adopts transparent organic glass to make, engrave the figure and the transport function literal thereof of each typical link circuit module on the described core circuit plate above, the position of this figure and literal is corresponding with each link circuit module, the experimenter sees through transparent display panel can see circuit diagram on the described core circuit plate, thereby understand the circuit design of different simulation links, described display panel is provided with "+" that is connected with digital transfiguration case with the digital variable rheostat of each link circuit module, "-" button and nixie display, press "+" on this nixie display next door, "-" button is adjustable resistor just, the value of electric capacity, thereby change the characteristic parameter of each link circuit module, and can be intuitively read at that time resistance value from nixie display, capacitance.

The working power of described each link modular circuit is+5V, provided by stabilized voltage supply independently, and connects common.The structure of each link modular circuit is expressed as follows respectively:

1, proportional component circuit module

Its transport function is:

R ₁=10k Ω

See also Fig. 2, described proportional component circuit module is made of chip LM324 and resistive element, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical proportional components, independent fully between these two groups of proportional components, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein R2 is a variable resistor, span is: 1K Ω～999K Ω, change the characteristic parameter scale-up factor K that its value can change proportional component, so the span of the scale-up factor K of proportional component is: 0.1～99.9.R2 adopts digital variable rheostat structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable resistor R2 just.When testing the experiment of proportional component separately, the D/A port that the input end IN (s) of described proportional component circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

2, integral element circuit module

Its transport function is:

T=R ₁C, R ₁=10k Ω

See also Fig. 2, described integral element circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical integral elements, independent fully between this two group inte grations link, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein C is a variable capacitance, span is: 1uf～99uf, change the characteristic parameter integration time constant T that its value can change integral element, so the span of the integration time constant T of integral element is 0.01s～0.99s.C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable condenser C just.When testing the experiment of integral element separately, the D/A port that the input end IN (s) of described integral element circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

3, proportional integral link circuit module

Its transport function is:

$G\left(s\right)=\frac{\mathrm{OUT}\left(s\right)}{\mathrm{IN}\left(s\right)}=K(1+\frac{1}{\mathrm{Ts}},)$

$K=\frac{R_2}{R_1}$ T＝R ₂C，R ₁＝10kΩ

See also Fig. 2, described proportional integral link circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical proportional integral links, independent fully between these two groups of proportional integral links, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein R2 is a variable resistor, C is a variable capacitance, its span is respectively 1K Ω～999K Ω and 1uf～99uf, the value that changes R2 and C can change the characteristic parameter scale-up factor K and the integration time constant T of proportional integral link, therefore the scope that the scale-up factor K of proportional integral link can value is 0.1～99.9, and the scope that integration time constant T can value is 0.01s～0.99s.R2 adopts digital variable rheostat structure, and C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable variable resistance R 2 or capacitor C just.When testing the experiment of proportional integral link separately, the D/A port that the input end IN (s) of described proportional integral link circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

4, differentiation element circuit module

Its transport function is:

T=R ₂C, R ₂=10k Ω

See also Fig. 2, described differentiation element circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical differentiation elements, independent fully between these two groups of differentiation elements, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein C is a variable capacitance, span is: 1uf～99uf, change the characteristic parameter integration time constant T that its value can change differentiation element, so the span of the derivative time constant T of differentiation element is 0.01s～0.99s.C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable condenser C just.When testing the experiment of differentiation element separately, the D/A port that the input end IN (s) of described differentiation element circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

5, proportion differential link circuit module

Its transport function is:

$G\left(s\right)=\frac{\mathrm{OUT}\left(s\right)}{\mathrm{IN}\left(s\right)}=K(1+\mathrm{Ts}),$

$K=\frac{R_2}{R_1},$ T＝R ₁C，R ₁＝10kΩ

See also Fig. 2, described proportion differential link circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical proportion differential links, independent fully between these two groups of proportion differential links, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein R2 is a variable resistor, C is a variable capacitance, its span is respectively 1K Ω～999K Ω and 1uf～99uf, the value that changes R2 and C can change the characteristic parameter scale-up factor K and the derivative time constant T of proportion differential link, therefore the scope that the scale-up factor K of proportion differential link can value is 0.1～99.9, and the scope that derivative time constant T can value is 0.01s～0.99s.R2 adopts digital variable rheostat structure, and C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable variable resistance R 2 or capacitor C just.When testing the experiment of proportion differential link separately, the D/A port that the input end IN (s) of described proportion differential link circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

6, proportion integration differentiation link circuit module

Its transport function is:

$G\left(s\right)=\frac{\mathrm{OUT}\left(s\right)}{\mathrm{IN}\left(s\right)}=K(1+\frac{1}{T_{i}s}+T_{d}s),$ $K=\frac{R_2}{R_1},$ Ti＝R ₂C ₂，Td＝R ₁C ₁，R ₁＝10kΩ

See also Fig. 2, described proportion integration differentiation link circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical proportion integration differentiation links, wherein R2 is a variable resistor, its span is 1K Ω～999K Ω, C1, C2 is a variable capacitance, its span is 1uf～99uf, change R2 and C1, the value of C2 can change the characteristic parameter scale-up factor K of proportion integration differentiation link, integration time constant Ti and derivative time constant Td, therefore the scope that the scale-up factor K of proportion integration differentiation link can value is 0.1～99.9, integration time constant Ti can value scope be: the scope that 0.01s～98.9s, derivative time constant Td can values is 0.01s～0.99s.R2 adopts digital variable rheostat structure, and C1, C2 adopt digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable variable resistance R 2 or capacitor C 1, C2 just.When testing the experiment of proportion integration differentiation link separately, the D/A port that the input end IN (s) of described proportion integration differentiation link circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

7, inertial element circuit module

Its transport function: T=R ₂C, R ₁=10k Ω

See also Fig. 2, described inertial element circuit module is by chip LM324 and resistance, the capacity cell structure forms, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of identical inertial elements, independent fully between these two groups of inertial elements, every group input end IN (s) and output terminal OUT (s) can distinguish use separately, wherein R2 is a variable resistor, C is a variable capacitance, its span is respectively 1K Ω～999K Ω and 1uf～99uf, the value that changes R2 and C can change the characteristic parameter scale-up factor K and the inertia time constant T of inertial element, therefore the scope that the scale-up factor K of inertial element can value is 0.1～99.9, and the scope that inertia time constant T can value is 0.01s～98.9s.R2 adopts digital variable rheostat structure, and C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable variable resistance R 2 or capacitor C just.When testing the experiment of inertial element separately, the D/A port that the input end IN (s) of described inertial element circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

8, second order oscillation element circuit module

Its transport function is:

$G\left(s\right)=\frac{\mathrm{OUT}\left(s\right)}{\mathrm{IN}\left(s\right)}=-\frac{{\mathrm{\ω}}_n^2}{s^2+2\mathrm{\ζ}{\mathrm{\ω}}_{n}s+{\mathrm{\ω}}_n^2},$

$\mathrm{\ζ}=\frac{R_2}{2R_1},$ ${\mathrm{\ω}}_n=\frac{1}{\mathrm{RC}},$ R＝10kΩ，R ₁＝10kΩ

See also Fig. 2, described second order oscillation element circuit module is formed by chip LM324 and resistance, capacity cell structure, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, wherein R2 is a variable resistor, C is a variable capacitance, and its span is respectively 1K Ω～999K Ω and 1uf～99uf, and the value that changes R2 and C can change the characteristic parameter dampingratio and the natural oscillation frequency ω of second order oscillation element _n, so the scope that the dampingratio of second order oscillation element can value is 0.05～49.95, natural oscillation frequency ω _nScope that can value is 1rad/s～100rad/s.R2 adopts digital variable rheostat structure, and C adopts digital transfiguration box structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable variable resistance R 2 or capacitor C just.When testing the experiment of second order oscillation element separately, the D/A port that the input end IN (s) of described second order oscillation element circuit module can be connected described data transmitting module is to accept analog input signal, and the A/D port that its output terminal OUT (s) connects data transfer module passes to computing machine and shows output waveform with output signal.

9. comparing element circuit module

Its transport function is: E (s)=U _i(s)-U _f(s), R ₀=10k Ω

See also Fig. 2, described comparing element circuit module is made of chip LM324 and resistive element, this LM324 is the integrated transporting discharging chip, comprise four operational amplifiers, be configured to two groups of comparing elements, independent fully between these two groups of comparing elements, every group input end Ui (s) sets port for set-point, Uf (s) is the feedback signal access interface, output terminal E (s) is a deviation, and they all can distinguish use separately, and wherein R1 is a variable resistor, span is: 1K Ω～999K Ω, be used for regulating the size that inputs to definite value, change the set-point Ui that its value can change comparing element, so the span of the set-point Ui of comparing element is :+0.05v～+ 5v.R1 adopts digital variable rheostat structure, and "+", "-" button of pressing the next door of nixie display on the described display panel be the value of adjustable resistor R1 just.When doing experiment, use comparing element can construct the close loop negative feedback loop, at first adjust the size that inputs to definite value Ui, can the working voltage table value of test Ui, the feedback signal that measured signal is obtained through sensor is connected to feedback signal access interface Uf (s) then, the value of output terminal deviation E (s) equals set-point and deducts value of feedback, as the input signal of controller.

Each link circuit module in the described analogue experiment installation can connect into a combined system, the input terminal of first link circuit module is as the input end of combined system, be connected to the D/A end of data transfer module, the input signal that receiving computer produces is (as step, pulse signal etc.), the input end of back one link circuit module connects the output terminal of last link circuit module successively, the output terminal of an end link circuit module is as the output terminal of combined system, be connected to the A/D end of data transfer module, output signal is sent to computing machine, in computing machine, show output waveform, measure real time data, the analytic system dynamic and static state performance, and the integrated calibration CONTROLLER DESIGN etc.Because each link circuit module is the representative basis module of control system, therefore described analogue experiment installation can satisfy structure second order, three rank or the needs of complex control system more.

Described computing machine is in order to data processing, analysis and control in real time, and it stores the analysis-by-synthesis design software.Described analysis-by-synthesis design software is made up of two parts: one is based on multichannel virtual oscillograph and the signal generator of LabVIEW, two are based on the analysis-by-synthesis software of MATLAB, software block diagram plays signal generation, measurement, demonstration, system's control and data processing respectively according to different experiments as shown in Figure 4.Multi channel signals generator based on LabVIEW can produce multiple general function waveform, and amplitude, frequency, the initial moment all can freely be set, and can be used as the input signal of experimental simulation device; Be used to observe the real time data of input signal based on the multichannel virtual oscillograph of LabVIEW, realize oscillographic general utility functions, and real time data can be saved as history curve or two-dimensional array.These data can send MATLAB software to, carry out System Discrimination by analysis-by-synthesis software based on MATLAB, set up system model, carry out systematic analysis again, such as time-domain analysis, root locus analysis and frequency-domain analysis etc., require to carry out the integrated calibration design of system then according to working control, finish the software emulation exploitation of controller.

Described data transmitting module is connected with computing machine with described analogue experiment installation respectively, and it is made up of data collecting card PCI8320 and inputoutput data interface board, as shown in Figure 5.

Described data collecting card PCI8320 adopts the pci bus socket, be installed in the PCI slot of computing machine, has plug and play (PnP) function, this PCI8320 comprises A/D converter ADC0809, D/A converter DAC0832, conventional data communication module, metadata cache expansion module, interface control logic circuit and power circuit, and it mainly finishes the data communication between described analogue experiment installation and the computing machine.

Described inputoutput data interface board is 37 core D type sockets (CZ1 and CZ2), and it is connected with data collecting card PCI8320, in order to be connected with outside source and experimental facilities by cable, goes into mould with transmission mode and goes out signal.This inputoutput data interface board be provided with analog quantity input port, analog quantity output port, digital quantity input port, digital quantity output port ,+output of 12V direct supply and+output of 5V direct supply, concrete parameter is as follows:

The analog quantity input port: the input channel number is single-ended 8 the tunnel, CH1～CH8 and corresponding simulation ground, and the A/D conversion resolution is 8, input reference signal 0V～+ 5V;

Analog quantity output port: output channel number single-ended 4 tunnel, D/A1～D/A4 and corresponding simulation ground, these four passages are independent mutually, can export at the same time or separately, the way of output can be selected curtage, D/A1V～D/A4V is four passages of voltage output end, D/A1I～D/A4I is four passages of current output terminal, but the output of the voltage of same road D/A can not be used simultaneously with the electric current way of output, the D/A conversion resolution is 8, D/A1V and D/A2V output signal range be 0V～+ 5V, the D/A3V output signal range is-2.5V～+ 2.5V, the D/A4V output signal range be 1V～+ 5V, D/A1I and D/A2I output signal range are 0mA～10mA, D/A3I and D/A4I output signal range are 4mA～20mA;

The digital quantity input port: 16 road Transistor-Transistor Logic levels are divided into two groups, every group 8 road DI0～DI7;

The digital quantity output port: 16 road Transistor-Transistor Logic levels are divided into two groups, every group 8 road DO0～DO7;

Standard DC power supply output port: the output of four groups+12V direct supply, the output of two groups+5V direct supply and public ground are provided.

The A/D converter of simulating signal by described data collecting card PCI8320 converts digital signal to and sends into computing machine, realize Computer Analysis control by the analysis-by-synthesis design software, digital control then output signal converts simulating signal to by D/A converter, the debugging of input actual control system, constantly the redjustment and modification controller parameter is controlled requirement until satisfying.Because input/output port is open fully, the signal that therefore can be used for gathering input or control output is not limited to this experimental system, only requires that external signal is that the industrial signal of standard gets final product.

Described temperature controlling stove thermostatic control module is a typical control circuit system module, and it is made up of the two large divisions, as shown in Figure 6.First comprises electric furnace heating wire, temperature sensor thermistor and the signal amplification circuit of controlled device electrothermal furnace, and high more its output voltage of temperature is more little, mainly is responsible for heating of electrothermal furnace heater strip and the output of collecting temperature signal.Second portion is a constant temperature control circuit, comprise controllable silicon and phase shift trigger pulse circuit thereof (containing synchronizing pulse and trigger pulse amplification etc.), the main phase place of being responsible for changing trigger pulse according to the control signal of input, produce synchronizing pulse, trigger pulse amplification etc., the phase shift trigger pulse is as silicon controlled gate pole control signal, change the silicon controlled conduction angle, make the voltage between silicon controlled anode and the negative electrode realize continuous scalable, promptly regulate the effective voltage at electrothermal furnace heater strip two ends, finally realize the pressure regulation thermostatic control of temperature controlling stove.Silicon controlled conducting and closed dutycycle time are represented in the light on and off of external LED lamp, the controllable silicon conducting if furnace temperature is lower than setting value, and system's heating, otherwise system stops heating, and furnace temperature naturally cools to setting value.This temperature controlling stove thermostatic control module can connect described analogue experiment installation, carries out combination experiment with wherein each link circuit module, also can carry out test experiments separately.

Described electric machine speed regulation control module also is a typical control circuit system module, and it is made up of the two large divisions, as shown in Figure 7.First comprises controlled device direct current generator and speed detector and direct supply etc., mainly finish speed acquisition, carry out speed governing etc., direct current generator is a miniwatt fan heat radiation motor, speed acquisition is finished by a pair of infrared emission, receiving tube, and rotating speed of motor has been reacted at the interval of receiving tube output pulse.Second portion is by the sensor signal shaping, and compositions such as control voltage power amplification mainly are responsible for producing the control voltage of controlling armature voltage.The ultimate principle of motor speed control is: by controller output-2.5v～+ output voltage of the Control of Voltage three-terminal voltage regulator LM317 of 2.5v, to reach the purpose of controlling the direct current generator armature voltage.

Claims (6)

1. open automatic control comprehensive Design experimental system, it is characterized in that: described comprehensive Design experimental system includes analogue experiment installation, data transmitting module and computing machine; Described analogue experiment installation is open case structure, its outermost layer is a casing, internal layer is the core circuit plate, the front of this core circuit plate is printed on circuit theory diagrams, be arranged with some typical link circuit modules above, its reverse side is provided with pcb board, numeral variable rheostat and digital transfiguration case, these some link circuit modules adopt integrated circuit (IC) chip and are equipped with input end and output terminal, each link circuit module can be by connecting the mutual independent assortment of this input end and output terminal to construct various control system, the anterior layer of this analogue experiment installation is a display panel, it adopts transparent organic glass to make, it is corresponding with each link circuit module to engrave the figure of described each link circuit module and transport function literal thereof and position above, and described display panel is provided with "+" that is connected with digital transfiguration case with described digital variable rheostat, "-" button and nixie display; Described computer stored has the analysis-by-synthesis design software; Described data transmitting module is connected with computing machine with described analogue experiment installation respectively, it is made up of data collecting card and inputoutput data interface board, this data collecting card is installed in the PCI slot of computing machine, it comprises A/D converter, D/A converter, conventional data communication module, metadata cache expansion module, interface control logic circuit and power circuit, this inputoutput data interface board and data acquisition card connection.

2. open automatic control comprehensive Design experimental system according to claim 1, it is characterized in that: described some link circuit modules include proportional component circuit module, integral element circuit module, proportional integral link circuit module, inertial element circuit module, differentiation element circuit module, proportion differential link circuit module, proportion integration differentiation link circuit module, second order oscillation element circuit module and comparing element circuit module.

3. open automatic control comprehensive Design experimental system according to claim 2, it is characterized in that: the integrated circuit (IC) chip of described link circuit module is LM324.

4. open automatic control comprehensive Design experimental system according to claim 2 is characterized in that: described data collecting card adopts PCI8320, and described A/D converter is ADC0809, and described D/A converter is DAC0832.

5. open automatic control comprehensive Design experimental system according to claim 1 and 2, it is characterized in that: described comprehensive Design experimental system also includes temperature controlling stove thermostatic control module, this temperature controlling stove thermostatic control module is made up of two parts, first comprises electric furnace heating wire, temperature sensor thermistor and the signal amplification circuit of controlled device electrothermal furnace, and second portion comprises controllable silicon and phase shift trigger pulse circuit thereof.

6. open automatic control comprehensive Design experimental system according to claim 1 and 2, it is characterized in that: described comprehensive Design experimental system also includes the electric machine speed regulation control module, this electric machine speed regulation control module is made up of two parts, first comprises controlled direct current generator, speed detector and direct supply, and second portion comprises sensor signal shaping, control voltage power amplifying circuit.

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