CN105388889B - Signal generator for pavement construction machinery control of product system - Google Patents
Signal generator for pavement construction machinery control of product system Download PDFInfo
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- CN105388889B CN105388889B CN201510953360.8A CN201510953360A CN105388889B CN 105388889 B CN105388889 B CN 105388889B CN 201510953360 A CN201510953360 A CN 201510953360A CN 105388889 B CN105388889 B CN 105388889B
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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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- 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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24036—Test signal generated by microprocessor, for all I-O tests
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of signal generators for pavement construction machinery control of product system, including console and the power supply signal on the console, and circuit, multi-way switching values signal generating circuit, multiple analog amount signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit and signal output interface and the touch display screen for providing operation interface and the various signals of display occurs；The power supply signal occur circuit, multi-way switching values signal generating circuit, multiple analog amount signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit signal output end be separately connected the signal output interface input terminal and the touch display screen signal input part, the output end of the signal output interface connects the signal input part of pavement construction machinery control of product system to be tested.The signal generator of the present invention can provide corresponding input signal for the control system of different pavement construction machinery products.
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 signal generator 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 performance of test mixing apparatus and its controller；The disclosed pressures of CN102798500A
Road machine steel wheel barycenter and amplitude uniformity test system and method are only used for the performance of test road roller and its controller.It is aobvious
So, the test mode of this different test machine of controller design for each pavement construction machinery product, testing cost is higher, takes
It is more, affect the time of making the product of pavement construction machinery product.
Therefore, it is necessary to a kind of signal generators specifically for the test of pavement construction machinery control of product device, can be various roads
The controllers of face engineering goods provides corresponding signal input, at the same can analog simulation output, judge the defeated of different controllers
The correctness for going out actuating signal, to save testing cost and testing time.
Invention content
Technical problem to be solved by the invention is to provide a kind of signal generations for pavement construction machinery control of product system
Device can provide corresponding input signal for the control system of different pavement construction machinery products.
To solve the above-mentioned problems, the present invention provides a kind of signal generator for pavement construction machinery control of product system,
Circuit, multi-way switching values signal generating circuit, occurs more for power supply signal including console and on the console
Kind analog signals occur circuit, pulse signal generation circuit, Waveform signal generating circuit and signal output interface and are used for
Operation interface is provided and shows the touch display screen of various signals；Circuit, multi-way switching values signal occur for the power supply signal
The signal output end of circuit, multiple analog amount signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit occurs
It is separately connected the signal input part of the input terminal and the touch display screen of the signal output interface, the signal output interface
Output end connect the signal input part of pavement construction machinery control of product system to be tested.
Further, it is provided on the console and is separately connected the power supply signal generation circuit, multiple analog amount letter
Number occur circuit, pulse signal generation circuit, Waveform signal generating circuit input terminal adjusting knob.
Further, the power supply signal that circuit output occurs for the power supply signal includes 5V, 12V, 24V, 220V three-phase electricity
It is a variety of in pressure, 380V three-phase voltages and constant current source signal.
Further, the power supply signal occur circuit by sequentially connected transformer circuit, bridge rectifier and
The branched regulator circuit composition for being connected in parallel on the bridge rectifier both ends, every regulator circuit are mainly switched by control, are linear
Voltage-stablizer and filter circuit are formed by connecting.
Further, the power supply signal occurs in circuit, and the regulator circuit of output ± 24V power supply signals includes connection institute
It states+24V the regulator circuits of one end of bridge rectifier and is connected to the -24V voltage stabilizings of the other end of the bridge rectifier
The circuit ,+24V regulator circuits include the first switch being sequentially connected in series from one end of the bridge rectifier, LM7824CT
Linear voltage regulator and+24V power supply signal output ends, and it is connected in parallel on the input terminal and ground of the LM7824CT linear voltage regulators
Between the first capacitor and the 7th capacitor, be connected between the output end and ground of the LM7824CT linear voltage regulators the tenth
Three capacitors and series circuit that is in parallel with the 13rd capacitor, being connected in series by the first LED light and first resistor, institute
State the output end of the termination LM7824CT linear voltage regulators of the first LED light, one end ground connection of the first resistor；Institute
State -24V regulator circuits include be sequentially connected in series from the other end of the bridge rectifier the 6th switch, LM7924CT it is linearly steady
Depressor and -24V power supply signal output ends, and be connected in parallel between the input terminal and ground of the LM7924CT linear voltage regulators the
Six capacitors and the 12nd capacitor, the 18th be connected between the output end and ground of the LM7924CT linear voltage regulators electricity
Container, with the 18th capacitor it is in parallel and series circuit made of being connected by the 6th resistance and the 6th LED light, described the
Six LED light one end are grounded, one end connection -24V power supply signal output ends of the 6th resistance.
Further, the power supply signal occurs in circuit, and the regulator circuit of output ± 12V power supply signals includes connection institute
It states+12V the regulator circuits of one end of bridge rectifier and is connected to the -12V voltage stabilizings of the other end of the bridge rectifier
The circuit ,+12V regulator circuits include second switch, the LM7812CT being sequentially connected in series from one end of the bridge rectifier
Linear voltage regulator and+12V power supply signal output ends, and it is connected in parallel on the input terminal and ground of the LM7812CT linear voltage regulators
Between the second capacitor and the 8th capacitor, be connected between the output end and ground of the LM7812CT linear voltage regulators the tenth
Four capacitors and series circuit that is in parallel with the 14th capacitor, being connected in series by the second LED light and second resistance, institute
State the output end of the termination LM7812CT linear voltage regulators of the second LED light, one end ground connection of the second resistance；Institute
State -12V regulator circuits include be sequentially connected in series from the other end of the bridge rectifier the 5th switch, LM7912CT it is linearly steady
Depressor and -12V power supply signal output ends, and be connected in parallel between the input terminal and ground of the LM7912CT linear voltage regulators the
Five capacitors and the 11st capacitor, the 17th be connected between the output end and ground of the LM7912CT linear voltage regulators electricity
Container, with the 17th capacitor it is in parallel and series circuit made of being connected by the 5th resistance and the 5th LED light, described the
Five LED light one end are grounded, one end connection -12V power supply signal output ends of the 5th resistance.
Further, the power supply signal occurs in circuit, and the regulator circuit of output ± 5V power supply signals includes connection institute
It states+5V the regulator circuits of one end of bridge rectifier and is connected to the -5V voltage stabilizing electricity of the other end of the bridge rectifier
Road ,+5V the regulator circuits include be sequentially connected in series from one end of the bridge rectifier third switch, LM7805CT it is linear
Voltage-stablizer and+5V power supply signal output ends, and be connected in parallel between the input terminal and ground of the LM7805CT linear voltage regulators
Third capacitor and the 9th capacitor, the 15th be connected between the output end and ground of the LM7805CT linear voltage regulators electricity
Container and series circuit that is in parallel with the 15th capacitor, being connected in series by third LED light and 3rd resistor, described
The output end of the one termination LM7805CT linear voltage regulators of three LED light, one end ground connection of the 3rd resistor；- the 5V
Regulator circuit includes the 4th switch, the LM7905CT linear voltage regulators being sequentially connected in series from the other end of the bridge rectifier
It is electric with -5V power supply signal output ends, and the 4th be connected in parallel between the input terminal and ground of the LM7905CT linear voltage regulators
Container and the tenth capacitor, the 16th capacitor being connected between the output end and ground of the LM7905CT linear voltage regulators,
With the 16th capacitor it is in parallel and series circuit made of being connected by the 6th resistance and the 6th LED light, the 4th LED
Lamp one end is grounded, one end connection -5V power supply signal output ends of the 4th resistance.
Further, the multi-way switching values signal generating circuit is mainly made of tri-state switch or potentiometer.
Further, the multiple analog amount signal generating circuit includes that voltage signal generation circuit and current signal occur
Circuit, the voltage signal generation circuit are mainly made of LM2575-ADJ and multi-turn adjustable resistance；The current signal occurs
Circuit include the first divider resistance, adjustable resistance, the second divider resistance, operational amplifier, current-limiting resistance, sample resistance and
NPN triode, first divider resistance, adjustable resistance, the second divider resistance be sequentially connected in series DC power supply terminal and ground terminal it
Between form bleeder circuit, the positive input terminal of the operational amplifier connects the adjustable side of the adjustable resistance, the current-limiting resistance,
Sample resistance is sequentially connected in series between the negative input end and ground of the operational amplifier, the output end connection of the operational amplifier
The base stage of the NPN triode, the emitter of the NPN triode connect the series connection between the current-limiting resistance and sample resistance
Node, the current collection extremely current signal output end of the NPN triode.
Further, the pulse signal generation circuit is mainly by microcontroller, current-limiting resistance, Differential Input operational amplifier
And variable resistance composition, the current-limiting resistance are connected to the pulse output end mouth of the microcontroller and the Differential Input operation
Between the negative input end of amplifier, the variable resistance is connected to negative input end and the output of the Differential Input operational amplifier
Between end, the output end output pulse signal of the Differential Input operational amplifier；The Waveform signal generating circuit mainly by
The microcontroller, D/A conversions integrated chip, operational amplifier and oscillograph composition, the input terminal of the D/A conversions integrated chip
Connect the digital signal output end mouth of the microcontroller, two output ends of the D/A conversions integrated chip are separately connected described
The positive input terminal and negative input end of operational amplifier, the feedback input end of the D/A conversions integrated chip connect the operation and put
The output end of big device, one end of the oscillograph connect the output end of the operational amplifier, and the other end is connected to described simultaneously
The positive input terminal and ground of operational amplifier, the output end output waveform signals of the operational amplifier.
Compared with prior art, technical scheme of the present invention has the advantages that：
1, a variety of regulated power supply signals can be exported, the controller for different pavement construction machinery products provides suitable work
Voltage.
2, can output mux amount signal, provide opening for three kinds of states for the controller of different pavement construction machinery products
Measure signal, i.e. high level, low level, high-impedance state in pass.
3, can output multi-channel voltage analog signal and multichannel current analog amount signal, and the voltage of output can be adjusted
With the size of current signal, the controller for different pavement construction machinery products provides required voltage signal and current signal.
4, can output multi-channel pulse signal and multiple waveforms signal, and the frequency of signal, amplitude etc. can be adjusted, for not
The controller of same pavement construction machinery product provides required pulse signal and waveform signal.
Description of the drawings
Fig. 1 is the panel construction of the signal generator for pavement construction machinery control of product system of the specific embodiment of the invention
Schematic diagram；
Fig. 2 is the side structure schematic diagram of signal generator shown in FIG. 1；
Fig. 3 is that the schematic diagram of circuit occurs for the power supply signal of signal generator shown in FIG. 1；
Fig. 4 is the schematic diagram of the voltage analog signal generating circuit of signal generator shown in FIG. 1；
Fig. 5 is the schematic diagram of the current-mode analog quantity signal generating circuit of signal generator shown in FIG. 1；
Fig. 6 is the pulse signal generation circuit of signal generator shown in FIG. 1 and the schematic diagram of Waveform signal generating circuit.
Specific implementation mode
It please refers to Fig.1 to Fig. 6, the present invention provides a kind of signal generator for pavement construction machinery control of product system, packet
It includes console and signal output interface 1, voltage signal generation circuit 2, power supply signal on the console occurs
Circuit 4, touch display screen 5, multi-way switching values signal generating circuit 6, Waveform signal generating circuit 7 occur for circuit 3, current signal
And pulse signal generation circuit 8.Circuit 3 occurs for voltage signal generation circuit 2, power supply signal, circuit 4 occurs for current signal,
The signal output end of multi-way switching values signal generating circuit 6, Waveform signal generating circuit 7 and pulse signal generation circuit 8 point
The signal input part of the input terminal and the touch display screen 5 of the signal output interface 1, the signal output interface are not connected
1 output end connects the signal input part of pavement construction machinery control of product system to be tested, and touch display screen 5 is for providing operation
Interface and the relevant information for showing various signals, such as can show the wavy curve of its received signal, and can show it
The parameters such as frequency, amplitude, the duty ratio of received signal.User can pass through touch at the touch operation interface of touch display screen 5
Mode sets the various signal parameters of the signal generator, to adjust signal generator finally to control system to be tested
The state of the test signal of output.
It please refers to Fig.1 and Fig. 2, the console includes the operation panel 10 that tables 11 and the tables 11 support, signal
Circuit 3 occurs for output interface 1, signal output interface 1, voltage signal generation circuit 2, power supply signal, circuit occurs for current signal
4, touch display screen 5, multi-way switching values signal generating circuit 6, Waveform signal generating circuit 7 and pulse signal generation circuit 8
It is installed on the operation panel 10.In the present embodiment, be provided on tables 11 or operation panel 10 be separately connected it is described
Power supply signal occur circuit, multiple analog amount signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit it is defeated
The adjusting knob for entering end, the output state for adjusting corresponding signal.
Referring to FIG. 3, circuit, which occurs, for the power supply signal 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 circuit occurs 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.
In this implementation, the multi-way switching values signal generating circuit can output mux amount signal (way is up to several
Ten even roads up to a hundred) be mainly made of multiple tri-state switch, each tri-state switch generally include signal input part, control Enable Pin
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 is 0 (low electricity
It is flat)；When it is 1 to control Enable Pin to input as the input of 0, signal input part, signal output end output is 1 (high level)；Work as control
When Enable Pin input processed is 1, the input of signal input part is 0 or 1, signal output end output is that high-impedance state (separates state
Resistance is very big, is equivalent to open circuit).
Referring to FIG. 1, in the present embodiment, 9 groups of circuit 4 and potentiometer occur for voltage signal generation circuit 2, current signal
At multiple analog amount signal generating circuit.Referring to FIG. 4, the voltage signal generation circuit 2 of the present embodiment is mainly by LM2575-
ADJ and multi-turn adjustable resistance composition specifically include transforming circuit T00, bridge rectifier D00 and connection bridge rectifier
The voltage signal outputting circuit at the both ends of D00, the bridge rectifier D00 are docked two-by-two by four diodes, two
Drop-over node is separately connected two output ends of transforming circuit T00, and the positive node that docks is connected with switch J01, LM2575- in turn
The ground terminal of ADJ switching power supply regulators U01 and positive voltage signal output end V0, U01 are grounded, filter condenser C01 and C03
It is connected in parallel between the input terminal of U01 and ground terminal, filter condenser C01 and by indicator light LED01 series connection variable resistance R01's
Series circuit is connected in parallel between the output and ground of U01.The negative docking node of bridge rectifier D00 is connected in turn
The ground terminal of switch J02, LM2575-ADJ switching power supply regulator U02 and negative voltage signal output end-V0, U02 are grounded, filter
Wave capacitor C02 and C04 are connected in parallel between the input terminal of U02 and ground terminal, filter condenser C06 and by indicator light LED02
The series circuit of series connection variable resistance R02 is connected in parallel between the output and ground of U02.Wherein, variable resistance is adjusted
R01, variable resistance R02 can correspond to the output for adjusting LM2575-ADJ switching power supply regulators U01, U02, and voltage signal
Variation range and step value can be set.
Referring to FIG. 1,9 exportable variable resistance signal of potentiometer, can adjust potentiometer to reach resistance as needed
Setting value, potentiometer can be accurate to 1 Ω.
Referring to FIG. 5, the current signal occur circuit 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.
Referring to FIG. 6, in the present embodiment, the pulse signal generation circuit 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.
With continued reference to FIG. 6, in the present embodiment, the Waveform signal generating circuit is in the pulse signal generation circuit
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.
Referring to FIG. 1, utilizing the above-mentioned signal hair for pavement construction machinery control of product system the present invention also provides a kind of
The method of a raw device pair road surface engineering goods control system test, including：
The signal input part of the controller of one road surface engineering goods is connected to the signal output interface 1 of the signal generator
On, the signal output end of the controller is connected on a display；
Start the signal generator, the signal generator exports corresponding test signal to the controller, the survey
Trial signal includes at least one of voltage signal, current signal, pulse signal, waveform signal, on-off model, test signal
Type can receive the type of signal according to controller to export, the setting of the signal generator output signal can be with
Realized by the adjusting knob of the operation interface of touch display screen or operation panel, thus start the signal generator it
Afterwards, the letter of the signal generator can be adjusted by the adjusting knob of the operation interface of touch display screen or operation panel
Number parameter, to export corresponding test signal to the controller；
After the controller receives corresponding test signal, the display is outputed signal to, described in which shows
The information such as the wavy curve and frequency of multichannel status signal, amplitude, duty ratio.
Claims (1)
1. a kind of signal generator for pavement construction machinery control of product system, which is characterized in that including console and installation
Power supply signal on the console occurs circuit, multi-way switching values signal generating circuit, multiple analog amount signal and electricity occurs
Road, pulse signal generation circuit, Waveform signal generating circuit and signal output interface and for providing operation interface and display
The touch display screen of various signals；Circuit, multi-way switching values signal generating circuit, multiple analog amount occur for the power supply signal
Signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit signal output end to be separately connected the signal defeated
The output end connection of the signal input part of the input terminal of outgoing interface and the touch display screen, the signal output interface is to be tested
Pavement construction machinery control of product system signal input part；It is provided on the console and is separately connected the power supply signal generation
Circuit, multiple analog amount signal generating circuit, pulse signal generation circuit, Waveform signal generating circuit input terminal adjusting rotation
Button；The power supply signal that circuit output occurs for the power supply signal includes 5V, 12V, 24V, 220V three-phase voltage, 380V three-phase voltages
With it is a variety of in constant current source signal；Circuit occurs for the power supply signal by sequentially connected transformer circuit, bridge rectifier
And it is branched be connected in parallel on the bridge rectifier both ends regulator circuit composition, every regulator circuit mainly by control switch,
Linear voltage regulator and filter circuit are formed by connecting；The power supply signal occurs in circuit, the voltage stabilizing electricity of output ± 24V power supply signals
Road includes the+24V regulator circuits of the one end for connecting the bridge rectifier and is connected to the another of the bridge rectifier
- 24V the regulator circuits at end ,+24V the regulator circuits include that first be sequentially connected in series from one end of the bridge rectifier opens
Pass, LM7824CT linear voltage regulators and+24V power supply signal output ends, and it is connected in parallel on the LM7824CT linear voltage regulators
The first capacitor and the 7th capacitor between input terminal and ground, the output end for being connected to the LM7824CT linear voltage regulators and
The 13rd capacitor between ground and it is in parallel with the 13rd capacitor, be connected in series by the first LED light and first resistor
Series circuit, the output end of the termination LM7824CT linear voltage regulators of first LED light, the first resistor
One end is grounded；- 24V the regulator circuits include be sequentially connected in series from the other end of the bridge rectifier the 6th switch,
LM7924CT linear voltage regulators and -24V power supply signal output ends, and it is connected in parallel on the input of the LM7924CT linear voltage regulators
The 6th capacitor between end and ground and the 12nd capacitor, the output end and ground that are connected to the LM7924CT linear voltage regulators
Between the 18th capacitor, with the 18th capacitor it is in parallel and made of being connected by the 6th resistance and the 6th LED light
Series circuit, the 6th LED light one end ground connection, one end connection -24V power supply signal output ends of the 6th resistance；
The power supply signal occurs in circuit, and the regulator circuit of output ± 12V power supply signals includes the connection bridge rectifier
- 12V the regulator circuits of+12V the regulator circuits of one end and the other end for being connected to the bridge rectifier ,+12V voltage stabilizings
Circuit includes second switch, LM7812CT linear voltage regulators and+the 12V electricity being sequentially connected in series from one end of the bridge rectifier
Source signal output end, and the second capacitor being connected in parallel between the input terminal and ground of the LM7812CT linear voltage regulators and
Eight capacitors, the 14th capacitor being connected between the output end and ground of the LM7812CT linear voltage regulators and with described
The series circuit that 14 capacitors are in parallel, are connected in series by the second LED light and second resistance, one end of second LED light
Connect the output end of the LM7812CT linear voltage regulators, one end ground connection of the second resistance；- 12V the regulator circuits include
The 5th switch, LM7912CT linear voltage regulators and the -12V power supply signals being sequentially connected in series from the other end of the bridge rectifier
Output end, and the 5th capacitor being connected in parallel between the input terminal and ground of the LM7912CT linear voltage regulators and the 11st electricity
Container, the 17th capacitor being connected between the output end and ground of the LM7912CT linear voltage regulators and the described 17th
Capacitor it is in parallel and the series circuit made of the 5th resistance and the series connection of the 5th LED light, the 5th LED light one end ground connection,
One end connection -12V power supply signal output ends of 5th resistance；The power supply signal occurs in circuit, output ± 5V
The regulator circuit of power supply signal includes the+5V regulator circuits of the one end for connecting the bridge rectifier and is connected to the bridge-type
- 5V the regulator circuits of the other end of rectification circuit ,+5V the regulator circuits include from one end of the bridge rectifier successively
Concatenated third switch, LM7805CT linear voltage regulators and+5V power supply signal output ends, and it is connected in parallel on the LM7805CT lines
Third capacitor and the 9th capacitor between the input terminal and ground of property voltage-stablizer are connected to the LM7805CT linear voltage regulators
Output end and ground between the 15th capacitor and it is in parallel with the 15th capacitor, by third LED light and third electricity
The series circuit being connected in series is hindered, the output end of the termination LM7805CT linear voltage regulators of the third LED light is described
One end of 3rd resistor is grounded；- 5V the regulator circuits include be sequentially connected in series from the other end of the bridge rectifier
Four switches, LM7905CT linear voltage regulators and -5V power supply signal output ends, and it is connected in parallel on the LM7905CT linear voltage regulators
Input terminal and ground between the 4th capacitor and the tenth capacitor, the output end for being connected to the LM7905CT linear voltage regulators
The 16th capacitor between ground, with the 16th capacitor it is in parallel and connected by the 4th resistance and the 4th LED light and
At series circuit, described 4th LED light one end ground connection, one end connection -5V power supply signals output of the 4th resistance
End；The multi-way switching values signal generating circuit is mainly made of tri-state switch or potentiometer；The multiple analog amount signal hair
Raw circuit includes voltage signal generation circuit and circuit occurs for current signal, the voltage signal generation circuit mainly by
LM2575-ADJ and multi-turn adjustable resistance composition；It includes the first divider resistance, adjustable resistance, that circuit, which occurs, for the current signal
Two divider resistances, operational amplifier, current-limiting resistance, sample resistance and NPN triode, first divider resistance, adjustable electric
Resistance, the second divider resistance are sequentially connected in series between DC power supply terminal and ground terminal and form bleeder circuit, and the operational amplifier is just
Input terminal connects the adjustable side of the adjustable resistance, and the current-limiting resistance, sample resistance are sequentially connected in series in the operational amplifier
Negative input end and ground between, the output end of the operational amplifier connects the base stage of the NPN triode, tri- poles NPN
The emitter of pipe connects the series connection node between the current-limiting resistance and sample resistance, and the current collection of the NPN triode is extremely electric
Flow signal output end；The pulse signal generation circuit mainly by microcontroller, current-limiting resistance, Differential Input operational amplifier and
Variable resistance forms, and the current-limiting resistance is connected to the pulse output end mouth of the microcontroller and the Differential Input operation amplifier
Between the negative input end of device, the variable resistance be connected to the Differential Input operational amplifier negative input end and output end it
Between, the output end output pulse signal of the Differential Input operational amplifier；The Waveform signal generating circuit is mainly by described
Microcontroller, D/A conversions integrated chip, operational amplifier and oscillograph composition, the input terminal connection of the D/A conversions integrated chip
Two output ends of the digital signal output end mouth of the microcontroller, the D/A conversions integrated chip are separately connected the operation
The feedback input end of the positive input terminal and negative input end of amplifier, the D/A conversions integrated chip connects the operational amplifier
Output end, one end of the oscillograph connects the output end of the operational amplifier, and the other end is connected to the operation simultaneously
The positive input terminal and ground of amplifier, the output end output waveform signals of the operational amplifier.
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| CN106771420A (en) * | 2016-11-25 | 2017-05-31 | 国网河南省电力公司平顶山供电公司 | Portable zero-pressure lifting device |
| CN108333397A (en) * | 2018-01-12 | 2018-07-27 | 山东送变电工程有限公司 | A kind of hand-held fixed current voltage output device |
| CN113311277A (en) * | 2021-06-25 | 2021-08-27 | 贵阳永青仪电科技有限公司 | Engineering machinery display and control integrated hardware and software function test system |
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