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Joint-Process

西門子S7-300 PLC模擬量轉換

Analog Inputs and Outputs in an S7 PLC are represented in the PLC as a 16-bit integer. Over the nominal span of the analog input or output, the value of this integer will range between - 27648 and +27648. However, it is easier to use the analog values if they are scaled to the same units and ranges as the process being controlled. This applications tip describes methods for scaling analog values to and from engineering units.

標簽： 300 PLC 西門子模擬量

上傳時間： 2013-11-17

上傳用戶：3294322651
基于AVR的PCB板雕刻機的設計

　　為了提高PCB板制作的效率，改變傳統(tǒng)的化學腐蝕制板工藝，使用機械仿形銑制作電路板的方法，設計了以ATMEGA16單片機為核心部件的PCB板雕刻機控制系統(tǒng)。其中包括PCB雕刻機的基本功能、主要硬件電路設計和軟件的實現(xiàn)流程，并給出了相關設計電路。重點分析了雕刻機步進電機的驅動電路以及主軸電機的驅動電路，該雕刻機經(jīng)實際運行，系統(tǒng)工作良好，可有效提高PCB板的制作效率。　　Abstract: 　　In order to improve the efficiency of production of PCB board and change the traditional chemical etching plates， using of mechanical copying milling method makes circuit boards，this paper introduces the PCB engraving machine control system used ATMEGA16 microcomputer as the core components. It includes basic function， the hardware circuit design and software realization process， and gives the corresponding circuit design.It analyses the drive circuit of engrawing machine stepper motor and spindle motor in detail. This engraving machine by practical operation， the system works well， which can effectively improve the production efficiency of PCB board.

標簽： AVR PCB 雕刻機

上傳時間： 2013-10-17

上傳用戶：liangliang123
基于AVR單片機的閉環(huán)控制系統(tǒng)

　　針對科研實驗中對拉壓千斤頂加載過程控制的需要，采用ATmega128單片機控制步進電機進而實現(xiàn)對執(zhí)行系統(tǒng)的電動泵站實行自動控制。對力和位移的數(shù)據(jù)采集與處理及用步進電機控制電動泵站手柄的技術細節(jié)作了重點描述。通過單片機的A/D變換器對AMP放大模塊采集的電橋信號作量化處理，千斤頂?shù)牟倏厥直恢靡离妱佑捅瞄y門開啟的方向和大小作若干定位，單片機根據(jù)力或位移傳感器信號，實時控制步進電機驅動手柄旋轉到相應操控位置。　　Abstract: 　　This article describes the use of ATmega128 AVR microcontroller series of DBS electric pumping stations and QF100/200 separate twoway hydraulic jack to automate the process of manipulating the work of the technical content. Articles on force and displacement data acquisition and processing， and stepper motor control electric pump with the handle of the key technical details were described. Through the MCU’s A / D converter module is collected on the AMP amplification quantify the signal bridge， jack handle position control valve opening according to the direction of electric pumps for a number of positioning and size of the microcontroller based on force or displacement sensor signals， real-time control stepper motor drive control handle rotate to the appropriate location.

標簽： AVR 單片機閉環(huán)控制

上傳時間： 2014-01-16

上傳用戶：hasan2015
通用1553B總線的信息監(jiān)控系統(tǒng)

在航電系統(tǒng)維護過程中，為解決定位故障的效率和降低維修成本等問題，提出了基于ICD（Interface Control Document，接口控制文件）的1553B總線的信息監(jiān)控系統(tǒng)模型。該系統(tǒng)運用數(shù)據(jù)采集卡對總線中傳輸?shù)男盘栍袩o失真、偏差等電氣特性進行檢測，并使用1553B通訊卡通過測控軟件LabWindows/CVI編程與ICD數(shù)據(jù)庫的動態(tài)鏈接，實現(xiàn)總線信息的解析和故障的判斷。與傳統(tǒng)的維護過程相比，這種模型能夠從信號的電氣特性以及信息的解析等全方位的去檢測判斷故障的來源，并且能夠廣泛在其他1553B總線系統(tǒng)內(nèi)擴展應用。驗證表明該監(jiān)控系統(tǒng)可以對總線信息進行快速有效地監(jiān)測分析，能滿足應用需求。 Abstract: In the process of avionics system maintenance， to solve the problems such as improving the efficiency of fast orientation to troubles and reducing maintenance cost， system of 1553B bus information monitor model based on ICD was proposed. The system observed whether the data which transmitted on the bus appear distortion and deviation by using data acquisition card. And using 1553B communication card programming of the measure software LabWindows/CVI and the dynamic linking of ICD database， message analysis and fault estimation could be realized. Compared with traditional maintenance， this model can all-dimensionally detect and analyze the source of faults from both electrical characteristics of the signal and message analysis， and it can be widely applied in the other 1553B system. Experiment shown that this monitor system can effectively detect and analyze the bus message and can meet the application requirements.

標簽： 1553B 總線信息監(jiān)控

上傳時間： 2013-11-23

上傳用戶：18752787361
單片機控制的鉛酸蓄電池充電電源

為了有效地提升鉛酸蓄電池的使用壽命，同時實現(xiàn)對充電過程的監(jiān)控，設計出一種用單片機控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓撲，連續(xù)電流工作模式，電源管理IC設計在電源的副邊，由ELAN公司的EM78P258N單片機模擬，是用可編程器件模擬電源管理IC，實現(xiàn)智能電源低成本化的一次成功嘗試，通過對單片機的軟件設計實現(xiàn)了充電電源的狀態(tài)顯示、充電時間控制、報警、過溫保護、過壓保護、過流保護等功能。本充電器真正的實現(xiàn)了鉛酸蓄電池的三段式充電過程，其最高輸出功率可達90 W，效率約85%，成本不到20元，具有很高的市場競爭力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile， a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal， charge time control， alarming， thermal protect， current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process， whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB， so that the charger is of powerful market competitiveness.

標簽： 單片機控制充電電源鉛酸蓄電池

上傳時間： 2013-11-16

上傳用戶：cepsypeng
基于PIC16LF874單片機的電容測量模塊

為提高電容測量精度，針對電容式傳感器的工作原理設計了基于PIC16LF874單片機電容測量模塊。簡單闡述了電容測量電路的應用背景和國內(nèi)外研究現(xiàn)狀，介紹了美國Microchip公司PIC16LF874單片機的特性。電容式傳感器輸出的動態(tài)微弱電容信號通過PS021型電容數(shù)字轉換器把模擬量數(shù)據(jù)轉換成數(shù)字量數(shù)據(jù)，所測數(shù)據(jù)由PIC16LF874單片機應用程序進行處理、顯示和保存。實驗結果表明，固定電容標稱值為10~20 pF 的測量值相對誤差在1%以內(nèi)，同時也可知被測電容容值越大，測量值和標稱值相對誤差越小。 Abstract: To improve the accuracy of capacitance measurement，aimed at the principle of work of mercury capacitance acceleration transducer，the design of micro capacitance measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the background and status of foreign researchers，focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors （capacitancedigital converter） to convert analog data into digital data，the measured data from the PIC16LF874 microcontroller application process， display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%，but also it canbe seen the value of the measured capacitance larger，measuring value and the nominal value of relative error smaller.

標簽： PIC 874 16 LF

上傳時間： 2013-10-29

上傳用戶：wojiaohs
基于ARM單片機的自動測高測距小車

生活中許多目標的高度和水平距離需要進行測量。目前主要的測量方法，仍以傳統(tǒng)的皮尺丈量為主，測量效率不高，有時還很不方便，沒有技術成熟的數(shù)字式測高測距產(chǎn)品。以基本的數(shù)學方法為理論依據(jù)，利用遙控小車做為載體，采用角度傳感器測量角度、霍爾傳感器測量水平距離等，通過單片機LM3S615進行數(shù)據(jù)計算，實現(xiàn)了對待測目標物體的高度、水平距離等數(shù)據(jù)的快速、精確和數(shù)字式的測量，高度測量精度可達99.06%，水平測量精度則可達98.06%。 Abstract: In our lives， the height and horizontal distance of some goals are needed to be measured. Because the currently used methods are still traditional tape-based measuring methods， and the measuring efficiency is low and inconvenient so some kinds of digital and portable measuring methods or instruments are needed. Based on the basic math theory， this paper designed and manufactured a portable， digital and remote controlled measuring mobile small vehicle， which assembled with angle measuring sensor for angle measurement and Hall sensor for horizontal distance measuring. MCU LM3S615 calculated the height and horizontal distance data gotten from these sensors. The measuring process is simple， the measuring results are more accurate and the measuring efficiency is higher than traditional measure instruments. The accuracy of height and distance measurement can reach 99.06% and 98.06%.

標簽： ARM 單片機自動

上傳時間： 2013-10-30

上傳用戶：jackandlee
基于凌陽單片機的步進電機加減速的控制方法

提出一種基于凌陽單片機的步進電機加減速的控制方法。采用凌陽科技推出的16位結構工控單片機SPMC75F2413A為控制器，由Allegro公司生產(chǎn)的兩相步進電機專用驅動器件SLA7042M構成步進電機的驅動電路，在傳統(tǒng)的3段直線加減速控制算法基礎上增加至7段S形曲線加減速過程，控制步進電機的啟動和停止。實驗結果表明，該控制方法克服了直線加減速中不連續(xù)、易造成系統(tǒng)沖擊的問題，整個系統(tǒng)實現(xiàn)柔性控制，電機啟動、停止連續(xù)性能提高30%。 Abstract: The method of controlled stepping motor is referred based on SPMC75F2413A MCU， which adopts the 16 knots SPMC75F2413A MCU as the controller. The special-purpose actuation chip SLA7042M of two stepping motor produced by Allegro Corporation constituted to actuation electric circuit. The purpose of increasing to seven section of S shape curve based on the traditional three sections of straight line is to control the start and stop process of stepping motor. The experimental results show that the control method solves easy to pull-out and overshot problems. The overall system realizes flexible control， and the performance of motor start or stop continuity is increased 30%

標簽： 凌陽單片機步進電機減控制方法

上傳時間： 2013-12-08

上傳用戶：jiangfire
基于MC9S12HZ256的總線式汽車數(shù)字儀表設計

首先研究CAN總線和SAE J1939協(xié)議，提出一種基于MC9S12HZ256微控制器的總線式汽車數(shù)字儀表解決方案。詳細介紹SAE J1939協(xié)議的報文幀格式及應用層協(xié)議中發(fā)動機相關參數(shù)的定義，以及步進電機及其驅動和車速信號的處理方法。該數(shù)字儀表系統(tǒng)硬件平臺由微處理器和信號采集和信息處理及顯示等模塊組成。軟件設計部分編程實現(xiàn)了對CAN總線和各傳感器數(shù)據(jù)的讀取、處理。該系統(tǒng)能夠實時反映車輛工況。 Abstract: In this paper，CAN bus and SAE J1939protocol are researched，and a vehicle digital instrument solution based on MC9S12HZ256MCU is proposed.The message frame format and some engine-related parameters’definition in SAE J1939application layer protocol are introduced in detail.Stepper motor and its driver，the methods of speed signal process-ing are also introduced.The hardware platform of vehicle digital instrument is composed by MCU，signal acquisition mod-ule，and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accom-plished by programming，and vehicle condition can be reflected in real-time.

標簽： 256 MC9 S12 MC

上傳時間： 2013-10-20

上傳用戶：huannan88
基于ISA總線的計算機與DSP的通信

在開放式數(shù)控系統(tǒng)結構模型的基礎上，研究了基于ISA總線的DSP通信控制原理。采用中斷方式完成了PC機和DSP之間的通信。介紹了以DriverWorks為工具開發(fā)ISA設備WDM驅動程序的方法，探討了中斷處理、驅動程序與應用程序之間的通信,簡要說明了驅動程序的安裝與調(diào)試。通過調(diào)試,系統(tǒng)設計運行穩(wěn)定。 Abstract: The ISA bus and DSP correspondence control principle is investigated in the basis of the existing open architecture numerical control system.The interrupt method is used to realize the communication between PC and DSP based on the ISA bus.The methods of WDM driver exploitation for ISA device using Driver Works are introduced.The main process of driver program and the keys such as handle interrupt and the communication between the drivers and application are presented.And how to debug and install the drive is explained.

標簽： ISA DSP 總線計算機

上傳時間： 2013-11-04

上傳用戶：kang1923