CN105404286B - Multi-functional analog test device and method for pavement construction machinery control of product system - Google Patents
Multi-functional analog test device and method for pavement construction machinery control of product system Download PDFInfo
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- CN105404286B CN105404286B CN201510951690.3A CN201510951690A CN105404286B CN 105404286 B CN105404286 B CN 105404286B CN 201510951690 A CN201510951690 A CN 201510951690A CN 105404286 B CN105404286 B CN 105404286B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0256—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system
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Abstract
The invention discloses a kind of Multi-functional analog test devices for pavement construction machinery control of product system, including operation console and the multiple analog signal on the operation console and switch signal generator, display screen, signal input interface and signal output interface；The signal output end of the signal input interface connects the signal input part of the display screen, and the signal input part of the signal input interface connects the signal output end of the controller of the pavement construction machinery control of product system；The signal output end of the multiple analog signal and switch signal generator connects the signal input part of the signal output interface, and the multiple analog signal and switch signal generator include voltage signal generating unit, current signal generating unit, waveform signal generating unit, pwm signal generating unit, on-off model generating unit；The signal output end of the signal output interface connects the signal input part of the controller.The invention also discloses a kind of test methods.
Description
Technical field
The invention belongs to field of road engineering machinery manufacturing technology fields, more particularly to one kind being used for pavement construction machinery control of product system
The Multi-functional analog test device and test method of system.
Background technology
Pavement construction machinery (pavement construction machinery) is the road for building highways and streets
A kind of machinery in face and airport road face etc..There are many product category of pavement construction machinery, are generally divided into soil surface construction machinery, rubble
Road surface construction machinery, asphalt concrete pavement construction machinery and four class of cement concrete road surface paving machine tool.Wherein, soil surface is applied
Work machinery is mainly Soil stabilization machinery, and Soil stabilization machinery is commonly used in scarifying soil, and it is equal to mix stabilizer stirring
It is even, be made and stablize soil, then through paving and being compacted, soil surface (base)；Macadam pavement construction machinery is mainly road-metal spreading machine,
Road-metal spreading machine is commonly used in the rubble that paves on roadbed, to build mud knot or water-bound macadam surface；Asphalt concrete pavement is applied
Work machinery mainly has bituminous pitch storing and fusing and heating equipment, goudronator, asphalt mixing plant, bituminous concrete
Paver and chips spreader etc., wherein goudronator is commonly used in the uniformly sprinkling drip on particulate metalling with penetration method
Blueness builds sub-surface to build bituminous paving or uniformly spray pitch on big grain metalling with penetration method；Pitch coagulation
Soil stirring equipment is commonly used in aggregate (sand and rubble), binding material (pitch etc.) and filler material (mountain flour) being stirred into pitch
Mixture；Bituminous concrete paver is subject to whole commonly used in uniformly paving asphalt on roadbed or sub-surface
Shape and preliminary jolt ramming, it must be matched with asphalt mixing plant；Cement concrete road surface paving machine tool mainly has
Cement concrete pavement reshaper and cement concrete vacuum quick-drying equipment etc. are commonly used in cement-concrete paving in roadbed
On, and the processes such as jolt ramming, shaping, joint-cutting, plucking and joint filling, vacuum quick-drying are carried out, keep concrete smooth, fast solidifying, and improve it
Intensity.
The reliability of pavement construction machinery product is mainly reflected in equipment and can not go out according to the time requirement continuous work of design
Existing failure.But the working environment of pavement construction machinery product is severe, after equipment is installed in building site, often due to high temperature or low temperature, tide
The factors such as wet, more dusts, pavement construction machinery product, which comes into operation, is shortly susceptible to such-and-such failure, cause equipment and
The loss of raw material, increases maintenance cost and cost of labor.When breaking down at the scene, it is also difficult to the original of accurate judgement failure
Cause, it is unclear that the inherent mechanism that failure occurs.Therefore, in order to improve the quality of pavement construction machinery product, pavement construction machinery product manufacturing
Enterprise needs the road pavement engineering goods security reliability before manufacture to be tested, and is broken down with to reduce equipment in building site general
Rate.Currently, enterprise generally can carry out follow-on test in links such as the designs, manufacture, production of pavement construction machinery product, to improve
The stability and reliability of pavement construction machinery product, and the key of wherein row follow-on test is exactly to improve the reliability of control system,
It normally can orderly be carried out with the everything of Guarantee control system.
However, since pavement construction machinery product is related to paver, milling machine, land leveller, asphalt mixer plant, plantmix, water
Mud paver etc., the corresponding controller of different pavement construction machinery products is different, and the input of each controller, output signal can exist
Difference, therefore the different test device of currently available technology generally use to carry out the controller of different pavement construction machinery products
Test, to adapt to the demand signals of the controller of different pavement construction machinery products, such as mixes and stirs disclosed in CN104864963A and sets
Standby temperature and current testing device are only used for the controller performance of test mixing apparatus；Road roller disclosed in CN102798500A
Steel wheel barycenter and amplitude uniformity test system and method are only used for the equipment performance of the controller of test road roller.Obviously,
This test mode for the different test machine of each pavement construction machinery product design, testing cost is higher, time-consuming more, affects
The time of making the product of pavement construction machinery product.
Therefore, it is necessary to a kind of multi-purpose simulating test devices, can be the controller of various pavement construction machinery products
The input of corresponding signal is provided, at the same can analog simulation output, judge the correctness of the output action signal of different controllers,
To save testing cost and testing time.
Invention content
Technical problem to be solved by the invention is to provide a kind of multi-functional moulds for pavement construction machinery control of product system
Quasi- test device and test method can provide corresponding signal input for the controller of various pavement construction machinery products, and test
The correctness of the output signal of different controllers.
To solve the above-mentioned problems, the present invention provides a kind of Multi-functional analog survey for pavement construction machinery control of product system
Trial assembly set multiple analog signal including operation console and on the operation console and switch signal generator, display screen,
Signal input interface and signal output interface；The signal output end of the signal input interface connects the signal of the display screen
Input terminal, the signal input part of the signal input interface connect the controller of pavement construction machinery control of product system to be tested
Signal output end；The signal output end of the multiple analog signal and switch signal generator connects the signal output interface
Signal input part, the multiple analog signal include voltage signal generating unit, current signal generation with switch signal generator
Unit, waveform signal generating unit, pwm signal generating unit, on-off model generating unit；The letter of the signal output interface
Number output end connects the signal input part of the controller, and the signal input interface includes the letter for being separately connected the display screen
The analog signals input interface and on-off model input interface of number input terminal.
Further, the display screen shows the analog signals input interface, the input of on-off model input interface
Signal wavy curve and frequency, amplitude, duty ratio.
Further, the Multi-functional analog test device further includes connecting the signal input interface and a variety of moulds
The memory of quasi- signal and switch signal generator, the waveform and correlation of the signal for storing the signal input interface input
Data and the storage multiple analog signal and the waveform of the parameter setting of switch signal generator and output signal with it is related
Data.
Further, the display screen is touch display screen, the touch display screen connect the multiple analog signal with
Switch signal generator, the signal for setting the multiple analog signal and switch signal generator by touch manner are joined
Number.
Further, the operation console includes the operation panel of tables and tables support, the multiple analog signal
It is installed on the operation panel with switch signal generator, display screen, signal input interface and signal output interface.
The present invention also provides a kind of dress is tested using the above-mentioned Multi-functional analog for pavement construction machinery control of product system
The test method set, including：
The signal input part of the controller of one pavement construction machinery product to be tested is connected on the signal output interface, it will
The signal output end of the controller is connected on the signal input interface；
Start the Multi-functional analog test device, the multiple analog signal is corresponding with switch signal generator output
Test signal gives the controller；
The controller receives after the test signal output multi-channel status signal to the signal input interface；
The multichannel status signal is delivered to the display screen and shown by the signal input interface.
Further, the test signal includes voltage signal, current signal, waveform signal, pwm signal hair, switching value
At least one of signal；
Further, the multichannel status signal includes analog signals and on-off model, the signal input interface
Including analog signals input interface and on-off model input interface, the analog signals input interface transmits the simulation
Signal is measured, the on-off model input interface transmits the on-off model.
Further, the display screen shows the wavy curve and frequency, amplitude, duty of the multichannel status signal
Than.
Further, the method further includes, and the signal input interface is by the waveform and phase of the multichannel status signal
Data are closed to store to a memory.
Further, it after starting the Multi-functional analog test device, adjusts the multiple analog signal and believes with switch
The signal parameter of number generator, to export corresponding test signal to the controller.
Compared with prior art, technical scheme of the present invention has the advantages that：
1, the multiple analog signal in technical scheme of the present invention and switch signal generator can provide multiple voltage signal,
Current signal, pulse signal, pwm signal, on-off model etc., so as to be carried for the controller of different pavement construction machinery products
It is inputted for signal；And the analog signals input that signal input interface includes the signal input part for being separately connected the display screen connects
Mouth and on-off model input interface, can sample the output signal of different controllers, and then be adopted by display screen observation
The state of sample signal, to detect different controllers output signal correctness.
2, the Multi-functional analog test device for pavement construction machinery control of product system of the invention, it is only necessary to will be to be tested
The signal input part of controller of pavement construction machinery product be connected to signal output interface, the signal output end of controller is connected to signal
Input interface, you can the controller is tested, is built flexibly, it is easy to operate.
Description of the drawings
Fig. 1 is the behaviour of the Multi-functional analog test device for pavement construction machinery control of product system of one embodiment of the invention
Make panel construction schematic diagram；
Fig. 2 is the side of the Multi-functional analog test device for pavement construction machinery control of product system of one embodiment of the invention
Face view；
Fig. 3 is the multiple analog signal of one embodiment of the invention and the structural schematic diagram of switch signal generator；
Fig. 4 A are the circuit diagrams of the power supply signal generating unit of one embodiment of the invention；
Fig. 4 B are the circuit diagrams of the voltage signal generating unit of figure one embodiment of the invention；
Fig. 4 C are the circuit diagrams of the current signal generating unit of one embodiment of the invention；
Fig. 4 D are the circuit theories of the pulse signal generating unit and pwm signal generating unit of one embodiment of the invention
Figure.
Fig. 5 is the Multi-functional analog test device for pavement construction machinery control of product system of another embodiment of the present invention
Operating board structure schematic diagram；
Fig. 6 is the connection of Multi-functional analog test device shown in fig. 5 and pavement construction machinery control of product system to be tested
Schematic diagram.
Specific implementation mode
It please refers to Fig.1 to Fig. 5, the present invention provides a kind of Multi-functional analog test for pavement construction machinery control of product system
Device, including operation console and signal output interface 1, display screen 2, analog signals on the operation console are inputted and are connect
Mouth 3, on-off model input interface 4, multiple analog signal and switch signal generator 5.The operation console includes tables 7 and institute
The operation panel 6 of the support of tables 7 is stated, signal output interface 1, display screen 2, analog signals input interface 3, on-off model are defeated
Incoming interface 4, multiple analog signal and switch signal generator 5 are installed on the operation panel 6.
Wherein, analog signals input interface 3, on-off model input interface 4 signal output end be all connected with it is described aobvious
The signal input part of display screen 2, analog signals input interface 3, on-off model input interface 4 signal input part be all connected with and wait for
The signal output end of the controller 9 of the pavement construction machinery control of product system of test；The multiple analog signal is sent out with switching signal
The signal output end of raw device 5 connects the signal input part of the signal output interface 1, and the signal of the signal output interface 1 is defeated
Outlet connects the signal input part of the controller 9.In the present embodiment, the wave of its received signal can be shown in display screen 2
Shape curve, and the parameters such as frequency, amplitude, duty ratio that can show its received signal.Preferably, display screen 2 is to touch to show
Display screen, there is a touch operation interface of the signal parameter of setting multiple analog signal and switch signal generator 5 thereon, and user can be
On the touch operation interface, the signal that the multiple analog signal and switch signal generator 5 are set by touch manner is joined
Number, to adjust the state for the test signal that multiple analog signal is exported with switch signal generator 5 to controller 9 to be tested.
It in other embodiments of the invention, can be on operation panel 6 when display screen 2 is the general display screen with oscillograph function
Operation button is set, to set the signal parameter of the multiple analog signal and switch signal generator 5, to adjust multiple analog
The state for the test signal that signal is exported with switch signal generator 5 to controller 9 to be tested.
Referring to FIG. 3, the multiple analog signal of the present embodiment may include that list occurs for voltage signal with switch signal generator 5
Member 51, current signal generating unit 52, waveform signal generating unit 53, pwm signal generating unit 54, on-off model occur single
Member 55, power supply signal generating unit 56 etc..
A is please referred to Fig.4, the power supply signal generating unit of the present embodiment can export multiple road engineering goods control system
Operating voltage, such as 5V, 12V, 24V, three-phase voltage 220V/380V, while being capable of providing constant-current source output.The power supply letter
Number generating unit specifically includes transformer circuit T1, bridge rectifier D1 and branched is connected in parallel on the bridge rectifier two
± 24V regulator circuits, ± 12V regulator circuits and the ± 5V regulator circuits at end.Bridge rectifier D1 is by four diodes two
Two dock, and can be 3N246 circuits, and two output ends of transformer circuit T1 are separately connected the drop-over of bridge rectifier D1
The drop-over node of diode, each regulator circuit are separately connected the docking section of the corresponding opposed diodes of bridge rectifier D1
Point.
Wherein, ± 24V regulator circuits can export ± 24V power supply signals, including connect the bridge rectifier D1's
- 24V the regulator circuits of+24V the regulator circuits and the negative butt end for being connected to the bridge rectifier of positive butt end, described+
24V regulator circuits include first switch J1, the LM7824CT line being sequentially connected in series from the positive butt end of the bridge rectifier D1
Property voltage-stablizer U1 and+24V power supply signal output ends, and be connected in parallel on the input terminal and ground of the LM7824CT linear voltage regulators U1
Between the first capacitor C1 and the 7th capacitor C7, be connected to the LM7824CT linear voltage regulators U1 output end and ground it
Between the 13rd capacitor C13, in parallel with the 13rd capacitor C1 and by the first LED light LED1 and first resistor R1 strings
Series circuit made of connection, the output end of a termination LM7824CT linear voltage regulators U1 of the first LED light LED1, institute
State one end ground connection of first resistor R1；- 24V the regulator circuits include from the negative butt end of the bridge rectifier D1 successively
Concatenated 6th switch J6, LM7924CT linear voltage regulator U6 and -24V power supply signal output ends, and be connected in parallel on described
The 6th capacitor C6 and the 12nd capacitor C12 between the input terminal and ground of LM7924CT linear voltage regulators U6, it is connected to institute
State the 18th capacitor C18 and the 18th capacitor C18 between the output end and ground of LM7924CT linear voltage regulators U6
Series circuit that is in parallel and being connected in series by the 6th resistance R6 and the 6th LED light LED6, the 6th LED light LED6 mono- terminations
Ground, one end connection -24V power supply signal output ends of the 6th resistance R6.Capacitor C1, C7, C6, C12 are used to defeated
Enter the filtering of signal, C13, C18 are used for the filtering of output signal, C1, C6 be 2200 μ F, C7, C12 be 0.33 μ F, C13,
C18 is 1 μ F.The instruction when series circuit of R1 and LED1 compositions is exported for+24V power supply signals, R6 and LED6 compositions
Instruction when series circuit is exported for -24V power supply signals, the ground terminal and LM7924CT lines of LM7824CT linear voltage regulators U1
The ground terminal of property voltage-stablizer U6 is grounded respectively.
± 12V regulator circuits can export ± 12V power supply signals, including the bridge is connected in parallel on together with+24V regulator circuits
+ 12V the regulator circuits of the positive butt end of formula rectification circuit D1 and bridge rectifier electricity is connected in parallel on together with -24V regulator circuits
- 12V the regulator circuits of the negative butt end of road D1.+ 12V the regulator circuits include the positive docking from the bridge rectifier D1
Second switch J2, LM7812CT the linear voltage regulator U2 and+12V power supply signal output ends being sequentially connected in series are held, and are connected in parallel on institute
State the second capacitor C2 and the 8th capacitor C8 between the input terminal and ground of LM7812CT linear voltage regulators U2, be connected to it is described
The 14th capacitor C14 and the 14th capacitor C14 between the output end and ground of LM7812CT linear voltage regulators U2 are simultaneously
Series circuit that is joining and being connected in series by the second LED light LED2 and second resistance R2, a termination of the second LED light LED2
The output end of the LM7812CT linear voltage regulators U2, one end ground connection of the second resistance R2；- 12V regulator circuits the packet
Include the 5th switch J5, LM7912CT linear voltage regulator U5 and -12V being sequentially connected in series from the other end of the bridge rectifier D1
Power supply signal output end, and the 5th capacitor that is connected in parallel between the input terminal and ground of the LM7912CT linear voltage regulators U5
C5 and the 11st capacitor C11, the 17th be connected between the output end and ground of the LM7912CT linear voltage regulators U5 electricity
Container C17, and the string that by fiveth resistance R5 and fiveth LED light LED5 is connected in series in parallel with the 17th capacitor C17
Join circuit, the one end the 5th LED light LED5 ground connection, one end connection -12V power supply signals output of the 5th resistance R5
End.Capacitor C2, C8, C5, C11 are used to the filtering of input signal, and C14, C17 are used for the filtering of output signal, and C2, C5 are
2200 μ F, C8, C11 are that 0.33 μ F, C14, C17 is 1 μ F.The series circuit of R2 and LED2 compositions is used for+12V power supply signals
The instruction when series circuit of instruction when output, R5 and LED5 compositions is exported for -12V power supply signals, LM7812CT are linear
The ground terminal of voltage-stablizer U2 and the ground terminal of LM7912CT linear voltage regulators U5 are grounded respectively.
± 5V regulator circuits can export ± 5V power supply signals, including together with+24 regulator circuits and+12 regulator circuits simultaneously
Be associated in+5V the regulator circuits of the positive butt end of the bridge rectifier D1, and with -24 regulator circuits and -12 regulator circuits
It is connected in parallel on -5V the regulator circuits of the negative butt end of the bridge rectifier together.+ 5V the regulator circuits include from the bridge
Third switch, LM7805CT linear voltage regulators and the+5V power supply signal output ends that one end of formula rectification circuit is sequentially connected in series, and
It is connected in parallel on third capacitor and the 9th capacitor between the input terminal and ground of the LM7805CT linear voltage regulators, is connected to institute
State the 15th capacitor between the output end and ground of LM7805CT linear voltage regulators and it is in parallel with the 15th capacitor,
The one termination LM7805CT of the series circuit being connected in series by third LED light and 3rd resistor, the third LED light is linear
The output end of voltage-stablizer, one end ground connection of the 3rd resistor；- 5V the regulator circuits include from the bridge rectifier
The 4th switch, LM7905CT linear voltage regulators and the -5V power supply signal output ends that the other end is sequentially connected in series, and be connected in parallel on described
The 4th capacitor and the tenth capacitor between the input terminal and ground of LM7905CT linear voltage regulators are connected to the LM7905CT
It is the 16th capacitor between the output end and ground of linear voltage regulator, in parallel with the 16th capacitor and by the 6th resistance
Series circuit made of connecting with the 6th LED light, the 4th LED light one end ground connection, one end of the 4th resistance connects institute
State -5V power supply signal output ends.
Referring to FIG. 3, in the present embodiment, voltage signal generating unit 51, current signal generating unit 4 constitute a variety of moulds
Analog quantity signal generating unit.B is please referred to Fig.4, the voltage signal generating unit of the present embodiment is mainly by LM2575-ADJ and multi-turn
Adjustable resistance forms, and specifically includes transforming circuit T00, bridge rectifier D00 and connects the both ends of bridge rectifier D00
Voltage signal outputting circuit, the bridge rectifier D00 docks two-by-two by four diodes, two drop-over nodes point
Not Lian Jie transforming circuit T00 two output ends, the positive node that docks is connected with switch J01, LM2575-ADJ Switching Power Supply in turn
The ground terminal of voltage-stablizer U01 and positive voltage signal output end V0, U01 are grounded, and filter condenser C01 and C03 are connected in parallel on U01's
Between input terminal and ground terminal, filter condenser C01 and equal by the series circuit of indicator light LED01 series connection variable resistance R01
It is connected in parallel between the output and ground of U01.The negative docking node of bridge rectifier D00 be connected in turn switch J02,
The ground terminal of LM2575-ADJ switching power supply regulators U02 and negative voltage signal output end-V0, U02 are grounded, filter condenser
C02 and C04 are connected in parallel between the input terminal of U02 and ground terminal, filter condenser C06 and variable by indicator light LED02 series connection
The series circuit of resistance R02 is connected in parallel between the output and ground of U02.Wherein, adjust variable resistance R01, can power transformation
Resistance R02 can correspond to the output for adjusting LM2575-ADJ switching power supply regulators U01, U02, and the variation range of voltage signal and
Step value can be set.
Please refer to Fig.4 C, the current signal generating unit include the first divider resistance R14, adjustable resistance R11, second point
Piezoresistance R13, operational amplifier U11, current-limiting resistance R16, sample resistance R12 and NPN triode Q1, the first divider resistance
R14, adjustable resistance R11, the second divider resistance R13 are sequentially connected in series between DC power supply terminal and ground, form bleeder circuit, described
The positive input terminal of operational amplifier U11 connects the adjustable side of the adjustable resistance R11, the current-limiting resistance R16, sample resistance
R12 is sequentially connected in series between the negative input end and ground of the operational amplifier U11, and the output end of the operational amplifier U11 connects
The base stage of the NPN triode Q1 is connect, the emitter of the NPN triode Q1 connects the current-limiting resistance R16 and sample resistance
Series connection node between R12, the current collection extremely current signal output end of the NPN triode Q1.In the present embodiment, VDD is
12V, R14 are 2.5K Ω, and R11 is up to 7.5K Ω, and R13 is 2.5K Ω, and R16 is 47K Ω, and R12 is 500 Ω, Q1 2N2221,
The feeder ear of U1 is VDD (12V), and adjusts the resistance value of R11, can adjust the big of the current signal of the collector output of Q1
Small, the adjustable extent of the current signal is 0~20mA.
Please refer to Fig.4 D, in the present embodiment, the pwm signal generating unit mainly by microcontroller U10, current-limiting resistance R10,
Differential Input operational amplifier U4A and variable resistance RV1 compositions, the current-limiting resistance R10 are connected to the microcontroller U10's
Between pulse output end mouth P1.0/T2 and the negative input end 2 of the Differential Input operational amplifier U4A, the variable resistance RV1
It is connected between the negative input end 2 and output end 1 of the Differential Input operational amplifier U4A, the Differential Input operation amplifier
1 output pulse signal of output end of device U4A.It can be sent to microcontroller with setup parameter by the man-machine interface of microcontroller U10
Then it is adjustable now to export pulse amplitude, frequency and duty ratio by P1.0/T2 causes for gossip by U10.Wherein, microcontroller U10 can be
AT89C52, current-limiting resistance R10 can be 10K Ω, and Differential Input operational amplifier U4A can be LM324.
Please continue to refer to Fig. 4 D, in the present embodiment, the waveform signal generating unit is in the pwm signal generating unit
On the basis of formed, mainly by described microcontroller U10, D/A conversion integrated chip U12, operational amplifier U13 and oscillograph volts
Input terminal D10~D13 (i.e. pin 4~7) of composition, the D/A conversion integrated chips U12 is connected respectively the microcontroller
U10 digital signal output end mouth D10~D13 (i.e. pin 20~24, corresponding interface P2.0/A8, P2.1/A9, P2.2/A10,
P2.3/A11), two output ends 12,11 of the D/A conversion integrated chips U12 are separately connected the operational amplifier U13's
Positive input terminal+and negative input end-, the feedback input end RFB connections operational amplifier of the D/A conversion integrated chips U12
The output end U13 of one end (+) described operational amplifier U13 of connection of the output end U13 (OP) of U13, the oscillograph volts
(OP), the other end (-) while the positive input terminal of the operational amplifier U13+and ground GND, the operational amplifier U13 being connected to
Output end U13 (OP) output waveform signals.The D/A conversions integrated chip U12 is preferably DAC0832, passes through microcontroller U10
With the cooperation of D/A conversion integrated chips U12, multiple waveforms signal can be exported, and the frequency of waveform signal, amplitude can be adjusted
Section.
In addition, the on-off model generating unit 55 of this implementation can be mainly made of multiple tri-state switch, can export
Multi-way switching values signal (way is up to dozens or even hundreds of road).Wherein, each tri-state switch generally includes signal input part, control
Enable Pin processed and signal output end, when it is 0 to control Enable Pin to input as the input of 0, signal input part, signal output end output
For 0 (low level)；When it is 1 to control Enable Pin to input as the input of 0, signal input part, signal output end output is (high electric for 1
It is flat)；When control Enable Pin input for 1, the input of signal input part be 0 or 1 when, signal output end output be high-impedance state (i.e.
It is very big to separate state resistance, is equivalent to open circuit).
Referring to FIG. 5, in the other embodiment of the present invention, the Multi-functional analog test device further includes the connection mould
Analog quantity signal input interface 3, on-off model input interface 4 and the multiple analog signal are deposited with switch signal generator 5
Reservoir 8, the memory are used to store the analog signals input interface 3, on-off model input interface 4 received signal
Waveform and related data, and store the parameter setting and output signal of the multiple analog signal and switch signal generator 5
Waveform and related data.
Referring to FIG. 6, the present invention also provides a kind of using above-mentioned for the multi-functional of pavement construction machinery control of product system
The test method of simulating test device, including：
The signal input part of the controller 9 of one road surface engineering goods is connected on the signal output interface 1, by the control
The signal output end of device 9 processed is connected on analog signals input interface 3 and on-off model input interface 4；
Start the Multi-functional analog test device, the multiple analog signal is answered with 5 the output phase of switch signal generator
Test signal give the controller 9, which includes voltage signal, current signal, pulse signal, pwm signal, switch
At least one of signal is measured, the type of test signal can receive the type of signal to be arranged according to controller 9, this sets
Setting can be realized by the operation interface of touch display screen or the operation button of operation panel 6, therefore start more work(
It can be adjusted by the operation interface of touch display screen or the operation button of operation panel 6 after simulating test device
The signal parameter of the multiple analog signal and switch signal generator 5, to export corresponding test signal to the controller
9；
After the controller 9 receives corresponding test signal, output multi-channel status signal to the analog signals inputs
Interface 3 and on-off model input interface 4, wherein analog signals input interface 3 transmits the mould in the multichannel status signal
Analog quantity signal, on-off model input interface 4 transmit the on-off model in the multichannel status signal；
The multichannel status signal is delivered to by the analog signals input interface 3 and on-off model input interface 4
The display screen 2 shows that display screen 2 shows the letters such as wavy curve and frequency, amplitude, the duty ratio of the multichannel status signal
Breath；Analog signals input interface 3 and on-off model input interface 4 are also by the wave of the multichannel status signal of reception simultaneously
Shape is stored with related data into a memory 8.
Claims (2)
1. a kind of Multi-functional analog test device for pavement construction machinery control of product system, which is characterized in that including operation console
And the multiple analog signal on the operation console and switch signal generator, display screen, signal input interface and
Signal output interface；The signal output end of the signal input interface connects the signal input part of the display screen, the signal
The signal input part of input interface connects the signal output end of the controller of pavement construction machinery control of product system to be tested；It is described
The signal output end of multiple analog signal and switch signal generator connects the signal input part of the signal output interface, described
Multiple analog signal includes voltage signal generating unit, current signal generating unit, waveform signal hair with switch signal generator
Raw unit, pwm signal generating unit, on-off model generating unit and power supply signal generating unit, the voltage signal hair
Raw unit is mainly made of LM2575-ADJ switching power supply regulators and variable resistance, and the voltage signal generating unit is for leading to
Variable resistance is overregulated to correspond to the voltage signal variation range and the stepping that adjust the output of LM2575-ADJ switching power supply regulators
Value, the current signal generating unit include adjustable resistance (R11), and the current signal generating unit is used for adjustable by adjusting
The resistance value of resistance (R11) adjusts the size of the current signal of output, and the pwm signal generating unit includes microcontroller, the PWM
Signal generating unit by setting the parameter in microcontroller for realizing that output pulse amplitude, frequency and duty ratio are adjustable, institute
It states on-off model generating unit to be mainly made of multiple tri-state switch, is used for output multi-channel opening amount signal, the power supply signal
Generating unit is used to export the operating voltage of multiple road engineering goods control system, while being capable of providing constant-current source output；Institute
The signal output end for stating signal output interface connects the signal input part of the controller；The signal input interface includes difference
Connect the analog signals input interface and on-off model input interface of the signal input part of the display screen；Wherein,
The display screen shows that the waveform for the signal that the analog signals input interface, on-off model input interface input is bent
Line and frequency, amplitude, duty ratio；
The Multi-functional analog test device further includes connecting the signal input interface and the multiple analog signal and switch
The memory of signal generator, the waveform and related data of the signal for storing the signal input interface input and storage
The waveform and related data of the parameter setting and output signal of the multiple analog signal and switch signal generator；
The display screen is touch display screen, and the touch display screen connects the multiple analog signal and occurs with switching signal
Device, the signal parameter for setting the multiple analog signal and switch signal generator by touch manner；
The operation console includes the operation panel of tables and tables support, and the multiple analog signal occurs with switching signal
Device, display screen, signal input interface and signal output interface are installed on the operation panel.
2. a kind of survey using the Multi-functional analog test device for pavement construction machinery control of product system described in claim 1
Method for testing, which is characterized in that including：
The signal input part of the controller of one pavement construction machinery product to be tested is connected on the signal output interface, it will be described
The signal output end of controller is connected on the signal input interface；
Start the Multi-functional analog test device, multiple analog signal test corresponding with switch signal generator output
Signal gives the controller；
The controller receives after the test signal output multi-channel status signal to the signal input interface；The signal is defeated
The multichannel status signal is delivered to the display screen and shown by incoming interface；
Wherein, the test signal includes in voltage signal, current signal, waveform signal, pwm signal hair, on-off model
It is at least one；The multichannel status signal includes analog signals and on-off model, and the signal input interface includes simulation
Signal input interface and on-off model input interface are measured, the analog signals input interface transmits the analog signals,
The on-off model input interface transmits the on-off model；
The display screen shows the wavy curve and frequency, amplitude, duty ratio of the multichannel status signal；
The signal input interface stores the waveform of the multichannel status signal and related data to a memory.
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