EPRO CON021
廈門莫格電氣自動(dòng)化有限公司
:雷琳
:/,
**,現(xiàn)貨,提供一年質(zhì)保!本公司所有產(chǎn)品都經(jīng)過專業(yè)嚴(yán)格檢測(cè),歡迎詢價(jià),采購(gòu)。只要您有
誠(chéng)意,本公司將會(huì)給你提供一個(gè)*優(yōu)勢(shì)的價(jià)格,共同拿下單子。
PLC模塊,可編程控制器,CPU模塊,IO模塊,DO模塊,AI模塊,DI模塊,網(wǎng)通信模塊,
以太網(wǎng)模塊,運(yùn)動(dòng)控制模塊,模擬量輸入模塊,模擬量輸出模塊,數(shù)字輸入模塊,數(shù)字輸出
模塊,冗余模塊,電源模塊,繼電器輸出模塊,繼電器輸入模塊,處理器模塊,
摘要:為了提高傳統(tǒng)溫度控制系統(tǒng)的性能,將PID控制理論與嵌入式系統(tǒng)相結(jié)合,采用瑞薩電子公司的H8S/2166作為核心處理器,AD公司的AD7705以及熱敏電阻溫度傳感器作為溫度檢測(cè)單元,利用4x6小鍵盤、LCD顯示器和S1D13305液晶控制器達(dá)到良好的人機(jī)交互,設(shè)計(jì)出了一個(gè)應(yīng)用于化工領(lǐng)域的嵌入式實(shí)時(shí)溫度控剞系統(tǒng)。相比于傳統(tǒng)溫度控制系統(tǒng),該系統(tǒng)提供了更強(qiáng)的計(jì)算能力和可擴(kuò)展能力,采用增量PID控制算法實(shí)現(xiàn)復(fù)雜控制。通過實(shí)驗(yàn),該系統(tǒng)能達(dá)到0.1℃的溫度控制精度以及小于120 s的溫度穩(wěn)定時(shí)間。
關(guān)鍵詞:溫度控制系統(tǒng);嵌入式;Renesas微控制器;PID控制器
溫度的測(cè)量及控制在社會(huì)生產(chǎn)生活中有著廣泛的應(yīng)用,而在石油、化工、電力、冶金等重要工業(yè)領(lǐng)域中則擔(dān)負(fù)著極其重要的測(cè)控任務(wù),溫度測(cè)控的及時(shí)、準(zhǔn)確,直接關(guān)系到生產(chǎn)效率和作業(yè)安全。伴隨著科技的快速發(fā)展,以51單片機(jī)為核心的智能測(cè)控系統(tǒng)得到了廣泛的應(yīng)用,基本上滿足了大部分的需求,但是對(duì)于一些要求測(cè)量精度高、控制精度高、實(shí)時(shí)性要求高、系統(tǒng)復(fù)雜的溫度控制系統(tǒng),單片機(jī)就不能滿足要求了,這就要求高精度和高速度的處理器。
本文提出一種基于Renesas H8S/2166徽控制器的溫度控制系統(tǒng)的設(shè)計(jì)方案,通過4×6小鍵盤和128x64 LCD顯示器提供良好的人機(jī)交互能力。該系統(tǒng)能有效地應(yīng)用于化學(xué)反應(yīng)溫度控制系統(tǒng),可提供一種自動(dòng)化、安全,實(shí)時(shí)的測(cè)控方式。
1 系統(tǒng)硬件組成EPRO CON021
系統(tǒng)主要由輸入輸出設(shè)備(鍵盤和LCD),步進(jìn)馬達(dá)送液泵,溫度傳感器和Renesas H8S/2166微控制器構(gòu)成。系統(tǒng)模塊圖如圖1所示。
1a.JPG
1.1 微控制器
Renesas H8S/2166是由瑞薩電子公司開發(fā)的16位微處理器,能很好的向上兼容H8/300和H8/300H系列的微處理器,擁有16個(gè)16位的通用寄存器,65條基本指令,以及各種外圍設(shè)備及接口,諸如8位計(jì)時(shí)器,16位計(jì)時(shí)器,PWM,數(shù)據(jù)傳輸控制器,看門狗,異步或時(shí)鐘同步串行通信接口(SCI),I2C總線接口,LPC接口,8位D/A轉(zhuǎn)換器和10位A/D轉(zhuǎn)換器。
1.2 溫度傳感器模塊
溫度傳感器模塊是一個(gè)較為核心的模塊,采用熱敏電阻溫度傳感器,溫度精度為0.1℃。并且為了提高轉(zhuǎn)換精度,使用了一個(gè)外部的16位A/D轉(zhuǎn)換器AD7705。
AD7705是美國(guó)AD公司推出的16位∑-△A/D轉(zhuǎn)換器。器件包括由緩沖器和增益可編程放大器(PGA)組成的前端模擬調(diào)節(jié)電路、∑-△調(diào)制器,可編程數(shù)字濾波器等部件。能直接將傳感器測(cè)量到的多路微小信號(hào)進(jìn)行A/D轉(zhuǎn)換。PGA可通過指令設(shè)定,對(duì)不同幅度的輸入信號(hào)實(shí)現(xiàn)1、2、4、8、16、32、64和128倍的放大,因此AD7705芯片既可接受從傳感器送來(lái)的低電平輸入信號(hào),亦可接受高電平信號(hào)。它的輸出速度同樣可由指令設(shè)定,范圍由20~500 Hz。這種器件還具有高分辨率、寬動(dòng)態(tài)范圍、自校準(zhǔn)、優(yōu)良的抗噪聲性能以及低電壓低功耗等特點(diǎn),非常適合儀表測(cè)量、工業(yè)控制等領(lǐng)域的應(yīng)用。它采用三線串行接口,有兩個(gè)全差分輸入通道,能達(dá)到0.003%非線性的16位無(wú)誤碼數(shù)據(jù)輸出,其增益和數(shù)據(jù)輸出更新率均可編程設(shè)定,還可選擇輸入模擬緩沖器,以及自校準(zhǔn)和系統(tǒng)校準(zhǔn)方式。工作電壓3 V或5 V。3 V電壓時(shí),zui大功耗為1 mW,等待模式下電源電流僅為8μA。
電路圖如圖2所示,Pt100即為熱敏電阻溫度傳感器。
Moseley Vox Alarm Unit Rack Mount
Grass Valley Borderline Generator 3273 Rack Mount
Sony K-102 Tape Machine Remote Control keypad ex ch 10 Adelaide
MFB server rack wall mount brackets Adelaide
MFB server rack Adelaide
MFB server rack on wheels + jack bolts Adelaide
AWA Audio Transmission Test System Generator SG1100 1M70603
JBL Musical Products Speaker Model E140-8 8 ohms Bit of flutter on sign wave
RCF L18-851KN Speaker - poling
Stone McColl Line conditioner filter ELECTRONICAS BOARD 3000 HST
2" horn flare from EAW KF850E
20 Way Burndy Multicore cable Multi-Pin Cord (12M) Audio Equipment
20 Way Burndy Multi-Pin Cord (12M) (6KG) Audio Equipment
20 Way Burndy Multi-Pin Cord (15M) (6KG) Black, Audio Equipment
20 Way Burndy Multi-Pin Multipin Audio Multicore cable concert trunk drop 15m
39RU rack case installation audio amp server Adelaide
PKE Rack Mount AMR-1 AM Off Air Receiver
Rack Mount Unit, Probablly a Splitter or Mixer for IFB Applications
Transmission Monitoring Alarm Concentrator Rack Mount
PKE Audio Switching Unit ASU-001 20 Way Relay Audio Switcher Rack Mount
Rack Mount Box
Linear Broadcast LBM-IF Modulator Rack Mount
HH Audio Driver Diaphragm Assembly CD500 993
TV Video camera Multi pin cable MP: JAE8810 SRCB06A21-269 2M
Video TV camera cable Multi pin Hirakawa Japan AWM E35664 (2M)
Video TV camera cable Multi pin Hirakawa Japan AWM E35664 (5M)
Video TV camera cable Multi pin Hirakawa Japan AWM E35664 (10M)
RCF L18-851KN Speaker
Rittal Industrial Rack Mount 19' Server and Amp Rack Mesh Enclosure Adelaide
Server or amp rack louver doors Adelaide delivery available ex Navy
20RU Floating equipment rack shock mount aluminium flight road case ex DSTO
Pair of Gauss loudspeakers 2" 2 inch compression driver horn flare
Quantity of 6 Meyer MSL3 speaker compression driver horn flares
Motorola UHF two way radio repeater diplexer PSU clearcom intercom interface
Soundcraft Vienna 2 40ch VCA mixing desk in road case large format analogue
Jack Strips RTS Transmission Products Pty audio patch bay jackfield socket strip
Chromatec TVD35 TVD 35 Stereo Audio Monitor Rack Mount on screen video
ADS-10 RGB Camera Interface Rack Mount
Scamp Rack mount power supply +28 and -28V
Server rack perspex door Adelaide delivery available
Server rack perspex door Adelaide delivery available ball bearing slides
Very heavy duty rack frame with double swing frames lifting points Adelaide
Large aluminium road flight case exhibition display touring
4 pairs of Lord Nelson concert bi-amp wedges JBL 2205
56 Output VDA Video Distribution Amp with 14 x 4 way output cards Rack Mount
Mains Generator Back Up Power System Status Indicator Panel Rack Mount
10 Slot AVE Video Distribution Amp with 5 x 9 Output VDA Modules Rack Mount
10 Slot AVE Video Distribution Amp with 10 x 9 Output VDA Modules VDA110
Video Rack Equipment with 14 Adder Modules
Yamaha Comp/Limiter GC2020 Compressor Rack Gear
IRT Monitor Amp PA-20D Rack Frame with 2 Amplifier & 2 Distribution Modules
IRT AA-289 Audio Switcher 10 Input 2 Output
Prac VDA Rack Equipped with PSU Module & 3 10Way VDA Modules
Server racks 9 matching units available Adelaide 850mm deep
Trimax valve plate to line audio output transformer TA 733B
Evertz Microsystems Edit Code Reader Model 3900 Rack Mount
2 Unit Rack Space Studio Air Conditioner Control Panel
Tannoy TX3 Speaker Processor Crossover Rack Mount
Evertz Digital Video Character Generator Model 1260
Dawe Instruments Octave Band Sound Level Meter Type 419B
Audio Devlopements Noise Monitoring & Control System AD NM1s
Neutrik 3300 (3302/3312/3322?/3314) Audio analyzer plotter
EAW MX8000 Crossover Close Coupled Network Processor