基于ATS52和MAX038的程控信号发生器的设计
Mechanical and electrical engineering in 2008, 37 (10) mechanical andelectrical engineering in 2008, 37 (10) figure 1 signal
generatorhardware design block diagram based on ATS52 devices and the designof the programmable signal generator MAX038 Xiong Chunru, ju-fang hu,guo-bing huang (at the college of mechanical and automationengineering, jiangxi at 338031) abstract date: 2008-04-23 abstract:the design based on MCU ATS52 and MAX038 signal generator,frequency and amplitude can be used to produce
programmablesine wave, square wave and triangular wave signal. MAX038 functiongenerator with a small amount of peripheral device responsible forgenerating waveform, the waveform after LM6361 broadband poweramplifier circuit output voltage amplification and leve1. The maincontroller ATS52 is responsible for the selection of waveform,frequency modulation, output amplitude modulation, LCD display,keyboard operation, etc.
Key words: signal generator;ATS52
;MAX038Chinese library classification number: TN741 literatureidentification code: B article number: 1009-9492 10-0069-041 (2008)introduction MAXIM MAX038 chip is produced by our company
Ahigh-frequency, precise function generator, which only requires lessconnection
Theoutside device can produce 0. 1 Hz ~ 20MHz.
Thehighest
A trig of a 40MHz
Thesawtooth wave, the sine wave,
Thesquare wave is affected by the pulse wave and the frequency and
thecontrol of the air ratio
Iin going to do |_1」independent]y.
Itcan be achieved by controlling MAX038 and other unit circuits by
singlechip ATS52
Controlthe type, frequency, output magnitude of the waveform,
etc?
Thischanges the lack of manual regulation of traditional signal
generators
Points? 2 signal generatorhardware circuit design 2. 1 hardware
circuit block diagramwhole circuit mainly by ATS52 singlechip
machine
Andpeople
Machineinterface (LCD and keyboard), power circuit,
Waveformgeneration and control circuit (signal generation circuit,
frequencycontrol circuit and
Switchcircuit), output drive circuit (adjustable voltage
amplifiercircuit and work
Thecomposition of the output leve1. The circuit diagram is shown infigure 1
Itis. 2. 2 unit hardware circuit design 2.2.1 man-machine interface
AdoptTG128E (128 x)
Thegraphic Chinese character of dual-use liquid crystal is explicit
Thedisplay tool, the inside of the LCD module?Whenthe program starts, the liquid first
The chip is initialized, which displays a welcome screen when it isturned on, and prompts for user action.
Then, accordingto user operation, the waveform type and frequency of signal outputare displayed in real time
Informationsuch as rate, step value and so on, the man-machine interface isfriendly, the graph is beautiful. The hardware for the
Usethe PO of ATS52 for the DBO ' DB7 data port of TG128E
ATS52P20 ~ P23 control port for control of LCD display.
Dueto the large number of buttons required, the application
ofhardware resources is considered
A4-by-4 matrix keyboard
Theline of the keyboard and the line are then attached to the
singlesheet
Plof the machine
Itis. 10 numeric keys 0 ' 9, a function key for waveform,
Thechoice of amplitude and frequency. Two buttons to add and
subtract,to adjust the frequency,
Theincrease and decrease of the step in the adjustment range?
2.2. 2 waveform generation and control circuit
The waveform generation and its control circuit consists ofthe
ATS52 chip and function signal
The generatorspecial chip MAX038 is made up of the module
transformerTLC5615
Frequencycontrol circuit, TC4066BP band switching circuit
Waveform,
Switchingcircuits. The relevant circuit is shown in figure 2
Itis.
Inthe waveform frequency control circuit,
ATS52MCU P32, P33, P35 respectively control the SPI serial
10research and development of TLC5615 d/a converters 69 mechanical
andelectrical engineering in 2008, 37 (10) mechanical and
electricalengineering in 2008, 37 (10) table
1max038 band distribution, frequency range and the choice of
electriccapacity
Band1
2
3
2type frequency range 10. 0 Hz、1.000kHz
1, 000 kHz ?10.00 kHz
10.00 kHz ?100.0 kHz
100.0kHz 1.000 MHz capacitance C60. 1
UF
C70.01mu F
C81000pF
TheC9100pF serial clock inputs SCLK,
Theserial data entered DIN and TLC5615
Pickthe CS signal
Itis. The analog voltage of the D/A transformation is then TLC5615
The7th leg output is R1 二50k
Theresistance of the Q into MAX038 10 feet
UN
Thefrequency of the output waveform can be controlled?
Thefrequency control algorithm is as follows: MAX038 output
frequencyis led by UN
The current of the foot, the charge of the coon for the earth and
the voltage of the fis? Let，ssay MAX038 is 10 feet UN input
voltage is Vin,
Concatenatedelectricity
Inthe case of Rin,
Thefrequency of the signals produced when the base 8 (fas) is
grounded
Theformula is: fo
Vin/(Rin x Cose) (1)
仃)
In:fo is the output frequency, the unit MHz; Vin is the input
Voltage,unit V; Rin is a series resistor
,theunit Q ；Thecosine of c is the output
Frequencyis strung into the capacitor value, unit pF [1]?
Asshown in figure 2, you can see that Rin 二50k
Q,Vin the range of 0. 5 5v, so on
Ata certain capacity, it can provide 10 times sweep range (band 1
except), thus | |
Areasonable choice of the capacitor of the Cose can determine the
outputfrequency range
,thatis, the frequency band?
Theband switching circuit is TC4066BP?
Electronicanalog switch) and 4
Bandcapacitance C6 C9
Thefour electronic analog switches in TC4066BP, controlled by
singlechip P24 ?P27,are switched on or off
Choose different capacitors for MAX038,s 5 feet cosine of c. |
|
I5m going to choose four
Samecosine of c
Thesignal is divided into four frequencies?
Coverthe requirements of the design.
Whenresistance Rin Q 二50k, Vin range from 5 v to 0?5v, by
type(1) can be calculated for each frequency band distribution
Thecapacity choice for scopes and capacitors is shown in table 1
Itis. Output drive circuit design of 2.2.3 signal generator
Because the output of MAX038 is constant 2V (P - P),
And lose,
Thecurrent is not high, so the output of the signal generator must
bedesigned
Providesufficient output voltage and current to meet the design
requirementof 5V voltage
Amplitudeand drive 50
Qload requirements?Theoutput driver circuit is the signal
Oneof the main difficulties in designing the device?Becausethe
outputsignal has a maximum base frequency of 20 MHZ,
Thehigh harmonic components of the triangle wave and the rectangle waveare very high, so it's going to be
Toget the actual output waveform, the amplifier has a high frequency
Wide?Thesecond requirement is that the output signal is adjustable within arange of 0 ' 5V
Thestep interval is 0. 1 V,
Thisrequires the magnification of the amplifier to be designed
Controlled by single chip microcomputer?In addition, drive the
low resistance load, the output driver circuit
Thecurrent output capacity is also an important parameter, which is 50
Qload on the 5 v output signal, the output driver circuit continuouscurrent lose at least 100 ma
Theability.
SelectNationalSemiconductor?s high-speed broadband shipping LM6361 as a voltage amplifier
Theparameters are well suited to the design
Theresearch and development and its control circuit diagram in figure 2waveform 70 mechanical and electrical engineering in 2008, 37 (10)mechanical and electrical engineering in 2008, 37 (10) flow chart offigure 5 step to adjust output submenu
Figure3 outputs the drive circuit diagram
Thehighest signal frequency can be up to 50MHz [2]?
Inorder to enable the amplification of the voltage amplifier in LM6361to be controlled by a single chip,
In series with LM6361 negative feedback circuit connected to 100 tapCAT5113 programmable digital potentiometer, CAT5113 is a simple andeasy-to-use programmable digital electricity
inelectronic systems, it can completely replace mechanical
potentiometers and fine tuning
Resistance[3]?
UseATS52 14 feet, 16 and 17 feet respectively control CAT5113 1 footINC end (incremental control input), CAT5113 CS 3 foot end (piece ofinput used to activate CAT5112 control input) and
CAT51132 feet U/D (increasing/decreasing the control side)?
Giventhat the typical value of the output current of LM6361 is 5mA [2],
Unable to meet the requirements of direct drive 50 Q load, so the
LM6361voltage amplification
Thesecond stage of the device separately designed the
complementarysymmetrical power amplification circuit of QI and Q2,
withplus or minus 12V voltage
Electricitygreatly improves the load capacity of the output level.
Inthe 50
Qdrive current when the load reached more than 200 ma, can fully
meetthe design requirements of driving load
Ability?Theoutput driver of the design is shown in figure 3
It is. System software design system software design adopt modular
design, each
Low coupling and high cohesion betweenmodules? The program
Writein C in KEIL environment
Andspeed up the
Developmentspeed, facilitate structured programming, contemporary
Thecode is readable, easy to maintain, and portable?
Softwaredesign is divided into four modules: main program,
Preset the submenu program to display the output parameter |
|
subdishes
Asingle program, step and output subroutine, which calls the other inthe main program
Threemodules?Themain program flowchart main program is shown as the main thread inthe menu
Toprovide the partial initialization of the system,
Thengo to the main menu and wait for the user command, which is shown infigure 4
? The pre-set submenu program isresponsible for the output signal frequency values
The voltage value of the keyboard setting and the output signal can
be set by the keyboard?
Theoutput parameter subroutine is responsible for keyboard scanning andfrequency, amplitude, and step
Real-timedisplay tasks for parameters such as input values.
Figure4 main program flow tutu research and development, 71 mechanical andelectrical engineering in 2008, 37 (10) mechanical and electricalengineering in 2008, 37 (10) the network address of a device must bein the hardware Settings, and the address of each site
Is the only one? The networkaddress of the upper-level machine is
throughthe extension slot of the upper machine
TheSA85 network adapter is set up
Itis. The network address of the PLC is set by two rotating
switchesafter the CPU module, and the frequency converter is
pluggedin
TheModbusplus communication card (vw3-a58302) on the converter is
set?Theweighing module of a loop for the 6ISP is included
Specialweighing module ISXISP
Y100;
Weight display unit TSXXBTH100; Process control program, connection
Box, etc? The ISXISPY100weight function is as follows
Itis.
1)the measurement input usually connects one or more load sensors,
weighingthe load
Thesensor provides a mV signal that is proportional to the
measurablematerial
,upto
Andthen eight loads of sensors
Theweighing module collects the data 50 times per second?2)with
twohigh speed discrete output, when the threshold voltage reaches
acertain value
Acontinuous response time and time operation is triggered?3)
Asealed digital connection, usually shown in the external display
unit
Theinstantaneous flow rate?4)
Itcan be installed on the PLC floor by slot?
Weighingmodules also provide the following functions: check, zero
preset,auto go
Skin, zero trace, transient measurement?Weighing modules with
microprocessors
Differentdata related to weighing, such as dynamic weighing
measurement,gross net weight, instantaneous
Flowrate, stability, zero, overload, manual tare, etc
Aswe 11 as the discrete value output, the tare value storage, and
soon. The software configuration IFIX3?5software runs on the
operatingplatform above Windows 2000
Areal 32-bit application
Usingthe powerful and practical variety built in it
Function,through the rich imagination and elaboration of the
developer,make the final
Theuser program will be able to match the application site to the
topmachine system
Tomonitor, control and manage the actual requirements, and to
display,control and
Communicationspeed, real time and compatibility are excellent
performance?
Basedon these advantages, the above monitoring software USES
IFIX3.5.
The standard man-machine interface was designed through the IFIX3.5
software, including the following aspects: 1) electroniccontrol
picture
Inthis image, the dynamic simulation shows the whole 360m2 burn
throughprogramming
Processflow of the machine system?Notonly can the operator be
monitored
Theoperation of the entire 360m2 sintering machine system
Youcan also follow the birth
Productionneeds to be made from different materials?Whenthe
devicefails, it's ok
Popup the alarm image and cause the operator，sattention. 2)
Instrumentcontrol picture
Thisimage shows the process parameters of the whole 360m2 sinteringmachine system
Itis. also
Thedesign of the mix of ingredients is designed for the operator to setthe matching parameters
A historical trend is designed to allow operators to navigatethrough, allowing operators to find out
Best controlmethod? The automatic batchingsystem is demonstrated in detail
Lotsof experiments and long hours
Thenormal operation of the room is successful and the system is in goodcondition
Well,it not only improves the automatic level of sintering, but alsoreduces maintenance and maintenance
Thelabor intensity of the worker, and the ability to reduce the returnrate, created the great classics
Thebenefit of the economy is therefore worth learning from?reference
[1]
DongBin Song Jie, DJ dee. Sintered disk batching belt scale
controlnew ideas [J]?Journalof sintered pellets, 2003, 28 (6) : 35 and 37. [2] jin-feng huang, lixian?Computerbatching system based on fieldbus [J]?Automation
Technologyand applications?2002,21 (3) : 35-36. [3_
Wang jianmin, sun tiqiang? The VClanguage development and microcomputer ingredients software forindustrial control software
Design [J]?Journal of hebei institute of technology 2002 (Zl) : 25-27?[4]yellow zun, peng xianwu. Cement raw microcomputer batching system[J]? Microcomputer letter
Rate,1998 (6) : 23-25. [5]
Shi1 in lock, wang tao, liu shunbo. Customer application implementationbased on the OPC specification
[J]?microcomputerinformation
2003(5) : 69-69. Introduction to the first author: song qiang, male, bornin 1974, shandong new Thai man, master, speaking
T.Research area: intelligent control and process contro 1. Ten
papershave been published
Itis. (editor: to fly) 3.
Step2: step by step adjustment and output subroutine to adjust the
outputsubroutine is mainly responsible for the selection of step
spacing,step
Thereduction in advance and step reduction, and the proportional
calculationof the internal parameters?step
Theflow diagram of the input output subroutine is shown in figure
5
It is. 4 conclusion compared with the traditional analog signal
generator, the signal generator based on single chipmicrocomputer
ATS52 and MAX038 design of low cost, waveform
Theadvantages of small distortion, programmable adjustment, human-
machineinterface friendly etc?Ithas been tested
Thefunction. 1)
Youcan produce the sine wave, the square wave, and the trig wave
waveform,
Theoutput signal frequency range is actually 1Hz 、1MHz
Thecapacitance of other capacitors on MAX038,s COSC will allow
the frequency to expand |
|
Showup to 0. 1 Hz ~ 20MHz [1],
Adjustableadjustment: in 10Hz 、1kHzrange
Theinner step spacing is 10Hz;
In1kHz ~ 1MHz, the interval is lkllz and the output signal
frequencyis set by the keyboard?2)in 50 Q load conditions, the
outputsignal is the voltage peak - peak Vopp adjustable within the
rangeof 0、5V, adjust step interval is 0. 1 V, output
Thevoltage value of the number can be set by the keyboard?3)
Thetype, amplitude, and magnitude of the output signal can be
displayedin real time on the liquid crysta1.
Frequency and frequency step values with friendly human-machine
interface? reference
[1]MaximlntegratedProducts?High- FrequencyWaveformGener -
AtorMAX038Datasheet[Z]. 2003. [2]
NationalSemiconductorCorporation.LM6161 / LM6261 /
LM6361HighSpeed0perationalAmplifier[Z]. 1999. [3]
Guangzhouzhou ligong single-chip machine development co., LTD.
100tap programmable digital potentiometer
(DPPTM)-cat5113 [Z]?2005.Introduction to the first author
Hewas born in 1973 in fengcheng, jiangxi province
Seniorengineer
Itis. Research area: embedded system development applications.
Tenpapers have been published?(editor:to
fly)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Study and development 72