以C8051F020為核心處理器，設(shè)計無線傳感器網(wǎng)絡(luò)數(shù)據(jù)采集系統(tǒng)。系統(tǒng)采用SZ05-ADV型無線通訊模塊組建Zigbee無線網(wǎng)絡(luò)，結(jié)合嵌入式系統(tǒng)的軟硬件技術(shù)，完成終端節(jié)點的8路傳感器信號的數(shù)據(jù)采集。現(xiàn)場8路信號通過前端處理后，分別送入C8051F020的12位A/D轉(zhuǎn)換器進行轉(zhuǎn)換。經(jīng)過精確處理、存儲后的現(xiàn)場數(shù)據(jù)，通過Zigbee無線網(wǎng)絡(luò)傳送到上位機，系統(tǒng)可達到汽車試驗中無線測試的目的。 Abstract: This paper designs a wireless sensor network system for data acquisition with C8051F020 as core processors.The system used SZ05-ADV wireless communication module，set up a Zigbee wireless network， combined with hardware and software technologies of embedded systems，completed the end-node 8-locale sensor signal data acquisition.Eight locale signals were sent separately into the 12-bit ADC of C8051F020 for conversion through front treatment.After accurate processing and storage，the locale data was transmitted to the host computer through Zigbee wireless.The system achieves the purpose of wireless testing in vehicle trial.
標簽： C8051F020 Zigbee 汽車測試 系統(tǒng)設(shè)計
上傳時間： 2013-11-23
上傳用戶：dsgkjgkjg
提出了一種以S3C2440A為核心處理器的銀行評價器的設(shè)計方案，并結(jié)合XILINX公司的XL95144XL型CPLD，輔助S3C2440A，實現(xiàn)該銀行評價器的各部分功能以及系統(tǒng)信號之間的相互協(xié)調(diào)。該評價器在系統(tǒng)設(shè)計上采用液晶屏顯示，代替了以往簡單的數(shù)碼管電路的顯示模式，在視覺上給人以全新的享受。同時，評價器增加了新的網(wǎng)絡(luò)供電方式，只要將評價器連接上網(wǎng)絡(luò)就可以正常工作，方便了客戶的使用。總之，此款銀行評價器采用了嵌入式系統(tǒng)的設(shè)計方案，大大豐富了系統(tǒng)功能，實現(xiàn)一個銀行評價器設(shè)計的新突破。 Abstract: S3C2440A of SamSung company is the core component of the embedded system. A design of bank assessor based on S3C2440A was provided in this paper. It used XL95144XL combined with S3C2440A to realize all the functions and coordination with system signals. This bank assessor used LCD to display instead of the former simple digital display and provided a new seusuous enjoment. Meanwhile，it provided a new method of network power supply，that the bank assessor could regularly work once it connected to the network，which is convenient for customers to use. In a word，this assessor takes embedded system，enriches the system’s functions and reclizes a new breakout.
標簽： S3C2440A
上傳時間： 2013-11-03
上傳用戶：taa123456
為提高溫度測量效率，降低系統(tǒng)的成本，擴展傳輸距離，設(shè)計出一種新型溫度采集系統(tǒng)。單片機通過控制具有單總線方式的溫度傳感器DS18B20實現(xiàn)對溫度的測量，同時單片機通過控制具有單總線方式300～450MHz頻率范圍內(nèi)的MAX7044與MAX7033無線發(fā)射與接收芯片實現(xiàn)溫度數(shù)據(jù)的無線傳輸。與傳統(tǒng)溫度采集系統(tǒng)相比，該系統(tǒng)利用單總線方式連接，采用無線傳輸方式實現(xiàn)遠距離通信，易于系統(tǒng)的集成與擴展。實驗結(jié)果表明，該系統(tǒng)結(jié)構(gòu)簡單、方便移植，能夠同時實現(xiàn)多達上百點溫度的測量與500m范圍的傳輸。 Abstract: To improve the temperature measurement efficiency and reduce system cost,expansion of transmission distance,a new type of temperature acquisition system is designed.Microcontroller controlled temperature sensor DS18B20which has a single-bus achieves temperature measurement,while microcontroller by controlled the MAX7044and MAX7033chip with a single-bus and having300~450MHz radiofrequency to achieve the wireless transmission of temperature data.Compared with conventional temperature acquisition system,the system uses single-bus connected,and uses wireless transmission means to achieve long-distance communications,easy-to-system integration and expansion.The experimental results show that the system is simple,convenient transplantation,and can be implemented in as many as a hundred-point temperature measure-ment and the transmission range of500meters.
標簽： 單總線 無線溫度 采集 系統(tǒng)設(shè)計
上傳時間： 2013-10-29
上傳用戶：515414293
設(shè)計一種基于P89V51RD2的功率因數(shù)測量儀，采用光電隔離器和專用數(shù)碼管驅(qū)動器。該測量儀是以增強型單片機P89V51RD2為核心，大大簡化系統(tǒng)硬件設(shè)計。而軟件部分采用模塊化設(shè)計思想，采用中值濾波和小數(shù)補償算法，實現(xiàn)功率因數(shù)的高精度測量。實驗測試表明，該功率因數(shù)測量儀測量精度高，運行穩(wěn)定可靠。 Abstract: A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive chip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
上傳時間： 2014-12-27
上傳用戶：CHINA526
詳細介紹工控軟件組態(tài)王與單片機多機串口通訊的設(shè)計原理。分析組態(tài)王提供的直接與單片機串口通信方法的優(yōu)點，給出系統(tǒng)基于RS-485總線傳輸?shù)慕涌陔娐吩韴D。根據(jù)組態(tài)王提供的通訊協(xié)議和單片機多機串口通訊的原理，給出程序設(shè)計流程與思路。 Abstract: In this paper，the design principle of communication between multi-SCM and KingView by serial ports is described in detail.We analysis the advantage of method supplied by KingView,by which KingView can communicate with serial ports of SCM directly，and provide the system’s interface circuit based on the RS-485transmission line.We provide flow diagram of programming and thinking on the basis of communication protocol supplied by KingView and principle of communication among multi-SCM through serial ports.
上傳時間： 2013-12-19
上傳用戶：tecman
介紹一種基于C8051單片機的動態(tài)心電監(jiān)護系統(tǒng)。該系統(tǒng)由兩部分組成：以C8051F320單片機為核心的數(shù)據(jù)采集裝置和以PC機為平臺的分析處理系統(tǒng)。硬件電路功耗低，由單片機自帶的USB接口將數(shù)據(jù)傳送給PC機。軟件平臺采用LabVIEW可視化虛擬儀器系統(tǒng)開發(fā)平臺，將傳統(tǒng)儀器的功能模塊集成到計算機中，用戶可通過修改虛擬儀器的程序改變其功能。采用USB接口實時傳輸心電數(shù)據(jù)，并將數(shù)據(jù)采集模塊設(shè)計為計算機外設(shè)，使該系統(tǒng)高速快捷、小巧便攜。 Abstract: In this design，a low-cost ECG electrocardiogram monitoring system is introduced，which consists of two parts:data acquisition device based on C8051F320and PC terminal as the analysis and processing system.The system is low-power consumption，the data is transmitted to the PC terminal by USB interface of the C8051F320.By using the visible virtual instrument system developing platform LabVIEW，the traditional instruments function modules are integrated into the computer，so the user can modify virtual instrument software to change its function to meet their needs.Using USB in-terface to realize real-time ECG data transmission，in addition，ECG data acquisition module is designed as the computer peripheral，which makes the syetem high-speed and portable.
標簽： C8051F320 心電監(jiān)護 系統(tǒng)設(shè)計
上傳時間： 2013-11-13
上傳用戶：zhangzhenyu
設(shè)計一種基于AT89C52的語音錄放系統(tǒng)，利用單片機、ISD2560語音錄放器件、麥克風、揚聲器等元器件實現(xiàn)硬件電路的設(shè)計，并利用C51高級語言設(shè)計ISD2560器件控制字的寫入和定時中斷程序。經(jīng)軟硬件調(diào)試，結(jié)果表明該系統(tǒng)錄放效果良好，具有一定的工程實用價值。 Abstract: Voice recording and playback system based on AT89C52is designed in this paper.Using the single-chip microcomputer，voice recording and playback chip ISD2560，microphone and speaker to realize the hardware circuit design.Writing ISD2560control words and timing interrupt procedures are designed by C51advanced language.Through the hardware and software test,voice recording and playback system play better voice,and this system has some engineering practical values.
上傳時間： 2013-10-20
上傳用戶：ywcftc277
該系統(tǒng)由單片機89S52控制模塊，程控寬帶放大模塊，整形模塊，F(xiàn)PGA內(nèi)頻率、相位差測量模塊等構(gòu)成，采用等精度測頻法測出頻率和周期，可測量有效值為0.01～5V，頻率范圍1Hz～20MHz信號的頻率、周期信號，精度高達10-6。采用計數(shù)法測量相位差，該系統(tǒng)可測量有效值0.5～5V，頻率10Hz～100kHz信號的相位差，精度為1°。系統(tǒng)功能由按鍵控制，測量結(jié)果實時顯示，人機界面友好。 Abstract: The system consists of the following functional blocks:89S52microcontroller controlling module,programmable amplifier module,comparator module,frequency and phase difference testing module in the FPGA.The system use the equal accuracy frequency-examining technique it measures frequency and circle of signal which its ranges is from1Hz to20MHz and the amplitude of which its range is from0.01Vrms to5Vrms,precision is up to10-6.Using of count method,the system detects the phase difference of signal,the amplitude of whic its range is from0.5Vrms to5Vrms and the frequency of which its ranges is from10Hz to100kHz,precision is up to1°,The system functions is controlled by certain keys,measurement results are displayed in real-time and it is friendly interface.
上傳時間： 2013-11-04
上傳用戶：CHINA526
介紹了當前普通標記機控制系統(tǒng)現(xiàn)狀及其存在缺點，給出氣動標記機及相頻修正PWM模式的工作原理。采用ATmega16單片機和USB轉(zhuǎn)換RS232接口器件CH341T實現(xiàn)驅(qū)動控制系統(tǒng)與PC的實時通訊，標記控制系統(tǒng)可升級到USB接口。采用基于ATmega16的相頻修正PWM替換555振蕩電路產(chǎn)生的PWM，可直接通過軟件調(diào)整PWM信號。使用達林頓三極管TIP122替代直流繼電器驅(qū)動高頻電磁閥，使得電磁閥驅(qū)動電路簡單，成本低廉。該控制系統(tǒng)已成功應(yīng)用于氣動標記機。 Abstract: In this paper,the actuality and demerit of the common gas marking machine control systems are described.The operation principle of the gas marking machine and the phase and frequency correct PWM of ATmega16is introduced.The real-time communication between the driving control system and PC by CH341T which its function is translated USB to RS232is realized,the control systems is updated grade to USB interface.The PWM signal can be adjustable by software for the555surge circuit was substituted by the phase and frequency.The high frequency electromagnetic value’s driving circuit by DC relay is replaced by TIP122,therefore,the circuit is become simple and the cost cheap.The control systems has been widely used in gas marking machine.
標簽： ATmega 16 標記 控制系統(tǒng)
上傳時間： 2013-10-18
上傳用戶：1427796291
提出一種基于C8051F040的炮塔方位角測試系統(tǒng)的設(shè)計方案，給出測試系統(tǒng)的各個模塊軟硬件設(shè)計。炮塔方位角測試系統(tǒng)集數(shù)據(jù)采集，數(shù)據(jù)傳輸和數(shù)據(jù)顯示等功能于一體，實現(xiàn)了炮塔方位角裝置的離線檢測。系統(tǒng)軟件采用C51編寫，對單片機進行有效電源管理，保證了系統(tǒng)的穩(wěn)定性，可靠性。 Abstract: This paper puts forwards a design of artillery position system based on C8051F040，describes all modules hardware and software design of measurement system.The system has the function of information collection，transmission，and display.It can measure artillery position system in offline.The system software using C51can manage the power of single chip microcomputer，guarantee the stability，reliability.
標簽： C8051F040 方位角 測試系統(tǒng)
上傳時間： 2014-12-27
上傳用戶：7891
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