This white paper raises some fundamental issues the design engineer should address before deciding upon a communication approach for a wireless NetWork. As no universal wireless NetWork solution exists, it should be custom tailored to suit the application demands. Defining your application communication characteristics is the key to ensure optimal communication reliability and resistance to interfering noise sources.
標(biāo)簽： 無線通信網(wǎng)絡(luò) 基本概念
上傳時間： 2013-11-23
上傳用戶：zhichenglu
Tuning the nRF24xx matching NetWork VICKY TEL:0755-26674773 E-mail:nrf800@freqchina.com
上傳時間： 2013-10-27
上傳用戶：gaoqinwu
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(jìn)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(jī)，系統(tǒng)可達(dá)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(biāo)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(biāo)簽： S3C2440A
上傳時間： 2013-11-03
上傳用戶：taa123456
以89S52單片機(jī)和EP1C6Q240C8型FPGA為控制核心的多功能計數(shù)器，是由峰值檢波、A/D轉(zhuǎn)換、程控放大、比較整形、移相網(wǎng)絡(luò)部分組成,可實現(xiàn)測量正弦信號的頻率、周期和相位差的功能。多功能計數(shù)器采用等精度的測量方法，可實現(xiàn)頻率為1Hz～10MHz、幅度為0.01～5Vrms的正弦信號的精確測頻，以及頻率為10Hz～100kHz、幅度為0.5～5Vrms的正弦信號精確測相。液晶顯示器能夠?qū)崟r顯示當(dāng)前信號的頻率、周期和相位差。該多功能計數(shù)器精度高，界面友好，實用性強(qiáng)。 Abstract: A multi-function counter，which uses89S52MCU and EP1C6Q240C8FPGA as a control core，consists of peak detector，A/D conversion，program-controlled amplification，compared shaping and phase-shifting NetWork part.The counter measures the frequency，period and phase of sinusoidal signal.With the equal precision method,the multi-function counter achieves the precise frequency measurement of the sinusoidal signal which its frequency is from1Hz to10MHz，its amplitude is from0.01Vrms to5Vrms，as well as the accurate phase measurement of the sinusoidal signal which its frequency is from10Hz to100kHz，its amplitude is from0.5Vrms to5Vrms.The LCD monitor real-time displays the frequency，period and phase difference of current signal.The multi-function counter features high precision，friendly interface，and strong practical.
標(biāo)簽： FPGA 單片機(jī) 多功能 計數(shù)器
上傳時間： 2013-11-15
上傳用戶：gy592333
對于傳統(tǒng)的跑步機(jī)無法聯(lián)機(jī)組網(wǎng)，保存歷史數(shù)據(jù)，實時調(diào)試等問題，介紹了一個由多臺跑步機(jī)通過RS-232串行總線與上位機(jī)相連組成的跑步機(jī)聯(lián)網(wǎng)系統(tǒng)。系統(tǒng)采用W77E58作為下位機(jī)核心控制器件，它具有雙串行通訊端口，其中一個串口用于與變頻器通訊，另一個串口則與上位機(jī)相連，構(gòu)成跑步機(jī)網(wǎng)絡(luò)。 Abstract: The traditional running machine can not be connected to a NetWork, saving historical data, real time debug etc.In this paper,a new NetWork system which is composed of running machines connected by a RS-232 communication bus is introduced.In the system,W77E58 is used as a core control unit.W77E58 has two serial ports,one is connected to the inverter and the other is connected to the PC. Thus a NetWork appears.
標(biāo)簽： W77E58 跑步機(jī) 聯(lián)網(wǎng)系統(tǒng)
上傳時間： 2014-12-27
上傳用戶：哇哇哇哇哇
基于CC1110單片機(jī)公交報站系統(tǒng)主要由CC1110單片機(jī)最小系統(tǒng)和WT588D語音模塊組成，提出了如何實現(xiàn)語音報站，通過無線通信SimpliciTI網(wǎng)絡(luò)協(xié)議實現(xiàn)公交站臺的自動播報和OLCD液晶顯示公交運行的各類信息。結(jié)果表明，該公交報站系統(tǒng)報站準(zhǔn)確率99%，價格比同類產(chǎn)品下降了300%以上，系統(tǒng)組成結(jié)構(gòu)簡單，提高了系統(tǒng)的抗干擾性和穩(wěn)定性，也便于攜帶。 Abstract: The bus stop announcement system based on CC1110 MCU is composed of CC1110 MCU minimum system and WT588D voice module. How to achieve the voice announcing is put forward.The bus-stop will announce automatically and display on the OLCD by means of wireless communication SimpliciTI NetWork protocol. As a result， the bus station stop announcement systems reported 99% accuracy rate， price of similar products declined by 300% or more， system of simple structure， improve the anti-jamming and stability of the power system， it is also portable.
標(biāo)簽： 1110 CC 單片機(jī) 公交報站
上傳時間： 2013-10-21
上傳用戶：baby25825
介紹一種基于單片機(jī)的多路溫度采集及監(jiān)控系統(tǒng)，能夠測量6路溫度信號，具有計算機(jī)聯(lián)網(wǎng)功能，各測量點可以單獨監(jiān)控和設(shè)置，可根據(jù)用戶的需求自動控制。測量溫度范圍為-10 ℃～200 ℃，控制方式采用模擬量調(diào)壓模式。該系統(tǒng)具有控制精度高、沖擊小等特點。 Abstract: A temperature collecting and surveillance-controlling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of NetWork connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
標(biāo)簽： 多路 溫度采集 監(jiān)控系統(tǒng)
上傳時間： 2013-10-23
上傳用戶：bjgaofei
為解決輸油管道溫度壓力參數(shù)實時監(jiān)測的問題，設(shè)計了以C8051F930單片機(jī)作為控制核心的超低功耗輸油管道溫度壓力遠(yuǎn)程監(jiān)測系統(tǒng)。現(xiàn)場儀表使用高精度電橋采集數(shù)據(jù)，通過433 MHz短距離無線通信網(wǎng)絡(luò)與遠(yuǎn)程終端RTU進(jìn)行通信，RTU通過GPRS網(wǎng)絡(luò)與PC上位機(jī)進(jìn)行遠(yuǎn)程數(shù)據(jù)傳輸，在上位機(jī)中實現(xiàn)數(shù)據(jù)存儲和圖形化界面顯示，從而實現(xiàn)輸油管道溫度壓力參數(shù)的實時監(jiān)測和異常報警。經(jīng)實驗證明，該系統(tǒng)的12位數(shù)據(jù)采集精度滿足設(shè)計要求，漏碼率小于1%，正常工作時間超過5個月，能實時有效地監(jiān)測輸油管道的溫度壓力參數(shù)，節(jié)省大量人工成本，有效預(yù)防管道參數(shù)異常造成的經(jīng)濟(jì)損失和環(huán)境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters， the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection， the 433MHz short-range wireless communication NetWork was used to make communication between field instrument and RTU， the GPRS was used by the RTU to transmit data to the PC host computer， and the data was stored and displayed in the PC host computer， so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time， it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
標(biāo)簽： C8051F930 溫度 壓力 遠(yuǎn)程監(jiān)測系統(tǒng)
上傳時間： 2013-11-07
上傳用戶：cuibaigao
CAN網(wǎng)絡(luò)模塊 聯(lián)系 楊迪 15336417867 0531-55508458 QQ：1347978253 htp://www.easyele.cn 控制局域網(wǎng)CAN (controller area NetWork)是國際上應(yīng)用最廣泛的現(xiàn)場總線之一，CAN幾乎成了汽車設(shè)計領(lǐng)域一種必須采用的技術(shù)手段，具有 很好的密封性， CAN網(wǎng)絡(luò)模塊采用汽車級CPU，更保障其穩(wěn)定性，通過UART轉(zhuǎn)CAN可以幫助用戶快速實現(xiàn)具有CAN-bus通訊接口的儀器、儀表設(shè)備 的項目設(shè)計等等。 CAN網(wǎng)絡(luò)模塊產(chǎn)品特點： CAN網(wǎng)絡(luò)模塊集成了8bit微處理器、CAN控制器、CAN收發(fā)器、總線保護(hù)于一身，所有元器件布置在一個微型的封裝模塊之內(nèi)，用戶只需要知道 RS232的通訊即可實現(xiàn)CAN通訊。提供上位機(jī)設(shè)計，CAN網(wǎng)絡(luò)模塊可以工作于透明傳輸模式和透明數(shù)據(jù)模式二種。UART輸出可以為TTL電平，RS232 或RS485。本產(chǎn)品應(yīng)用于消防安防、智能樓宇、酒店門鎖、煤礦通訊、船舶運輸?shù)葢?yīng)用領(lǐng)域，是公認(rèn)的穩(wěn)定可靠的通訊模式。 本產(chǎn)品廣泛的適用范圍廣，價格低廉，使用方便。所以上市以來受到客戶青睞。CAN網(wǎng)絡(luò)模塊，我們恩易電子公司擁有完全自主知識產(chǎn)權(quán)，設(shè)計 ，研發(fā)，生產(chǎn)，銷售與一體，保證質(zhì)量，使用方便，性能優(yōu)越，專業(yè)包裝，資料詳細(xì)，結(jié)構(gòu)合理。詳情可登陸我公司的網(wǎng)站，CAN網(wǎng)絡(luò)模塊簡單 操作，歡迎購買。
標(biāo)簽： CAN 網(wǎng)絡(luò)模塊
上傳時間： 2014-07-12
上傳用戶：hzakao
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