為了提高環(huán)境參數(shù)采集的自動化水平，提升效率，設(shè)計了無線傳感器系統(tǒng)。本系統(tǒng)運用了傳感器技術(shù)、通信技術(shù)和單片機技術(shù)，實現(xiàn)了對環(huán)境溫度、濕度、光照度以及可燃性氣體濃度等參數(shù)的檢測。它能夠?qū)崟r地與上位機進行無線通信，滿足對環(huán)境參數(shù)實時監(jiān)測的要求。 Abstract: In order to increase the degree of automation and improve the efficiency of the environment monitoring parameters，the wireless sensor system was developed.Combining with the technique of sensor,automatic monitoring，communication and single-chip microcomputer，it realized real-time monitoring environment parameters,such as temperature，humidity，illumination，concentration of com- bustible gas and so on.At the same time it can communicate with upper personal computers，satisfy the desire of real-time monitoring.
上傳時間： 2013-11-22
上傳用戶：longlong12345678
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進行通信，RTU通過GPRS網(wǎng)絡(luò)與PC上位機進行遠(yuǎn)程數(shù)據(jù)傳輸，在上位機中實現(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
為解決傳統(tǒng)可視倒車?yán)走_(dá)視頻字符疊加器結(jié)構(gòu)復(fù)雜，可靠性差，成本高昂等問題，在可視倒車?yán)走_(dá)設(shè)計中采用視頻字符發(fā)生器芯片MAX7456。該芯片集成了所有用于產(chǎn)生用戶定義OSD，并將其插入視頻信號中所需的全部功能，僅需少量的外圍阻容元件即可正常工作。給出了以MAX7456為核心的可視倒車?yán)走_(dá)的軟、硬件實現(xiàn)方案及設(shè)計實例。該方案具有電路結(jié)構(gòu)簡單、價格低廉、符合人體視覺習(xí)慣的特點。經(jīng)實際裝車測試，按該方案設(shè)計的可視倒車?yán)走_(dá)視場清晰、提示字符醒目、工作可靠，可有效降低駕駛員倒車時的工作強度、減少倒車事故的發(fā)生。 Abstract: A new video and text generation chip，MAX7456，was used in the design of video parking sensor in order to simplify system structure，improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure，lower cost，and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance，which makes the driver easy to see backward and reduces chance of accidents.
標(biāo)簽： 7456 MAX 可視倒車 中的應(yīng)用
上傳時間： 2013-12-10
上傳用戶：qiaoyue
提出一種基于單片機AT89C51SND1C的MP3播放系統(tǒng)的設(shè)計方案。單片機集成了專用的解碼器，使用K9F1208閃存作為外存儲器，放音電路采用CS4330，存儲文件通過播放器上的USB接口設(shè)備從PC機上直接下載，液晶顯示采用LCD1602。方案設(shè)計簡單，性價比高，低功耗，易擴展。由于采用的是通用單片機實現(xiàn)的，可以很容易地移植到其他微控制器系統(tǒng)中，有很強的市場競爭能力和實用價值。 Abstract: A MP3 player design based on microchip AT89C51SND1C was presented, which used K9F1208 Flash chip as the memory circuit and used CS4330 as play chip. Storage files were download from PC through USB interfaces player on the device，and the LCD/602 was used as display screen. This system had characteristics of simple design,low power,easy expand，low cost and high recognition. Using of universual microchip make it easy to transplant to other microcontrol system，and have strong market competitiom and practical value.
上傳時間： 2014-12-27
上傳用戶：佳期如夢
The CAT93C46 is a 1 kb Serial EEPROM memory device which isconfigured as either 64 registers of 16 bits (ORG pin at VCC) or 128registers of 8 bits (ORG pin at GND). Each register can be written (orread) serially by using the DI (or DO) pin. The CAT93C46 features aself−timed internal write with auto−clear. On−chip Power−On Resetcircuit protects the internal logic against powering up in the wrongstate.
上傳時間： 2013-11-20
上傳用戶：ynzfm
本文介紹了基于AT89C52 單片機的自動水溫控制系統(tǒng)的設(shè)計及實現(xiàn)過程。該系統(tǒng)具有實時顯示、溫度測量、溫度設(shè)定并能根據(jù)設(shè)定值對環(huán)境溫度進行調(diào)節(jié)實現(xiàn)控溫的目的以及達(dá)到上下限溫度報警功能，控制算法是基于數(shù)字PID 算法。關(guān)鍵詞 ：PID AT89C52 脈寬調(diào)制 實時 Abstract ： This article describes AT89C52 single-chip microcomputer-basedautomatic water temperature control system design and implementation process. Thesystem has real-time display, temperature measurement, temperature settings and theenvironment in accordance with the temperature settings adjusted to achieve thepurpose of temperature control and reach the upper and lower limits of temperaturealarm function, the control algorithm is based on the digital PID algorithm.Keyword: PID AT89C52 PWM real time
上傳時間： 2013-10-10
上傳用戶：歸海惜雪
基于AT89C52單片機的步進電機控制系統(tǒng)設(shè)計 摘 要: 提出了一個由AT89C52單片機控制步進電機的實例?？梢酝ㄟ^鍵盤輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實時對步進電機工作方式進行設(shè)置, 具有實時性和交互性的特點。該系統(tǒng)可應(yīng)用于步進電機控制的大多數(shù)場合。實踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進電機控制器。 關(guān)鍵詞: 單片機; 步進電動機; 直流固態(tài)繼電器; 實時控制 ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi-tional stepp ing motor controller.
上傳時間： 2013-11-22
上傳用戶：vodssv
The CAT28LV64 is a low voltage, low power, CMOS Parallel EEPROM organized as 8K x 8−bits. It requires a simple interface for in−system programming. On−chip address and data latches, self−timed write cycle with auto−clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bit signal the start and end of the self−timed write cycle. Additionally, the CAT28LV64 features hardware and software write protection.
上傳時間： 2013-11-16
上傳用戶：浩子GG
This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.
標(biāo)簽： Pulsoximeter Single-Chip Des
上傳時間： 2013-10-27
上傳用戶：黑漆漆
本文介紹了一種基于單片機的健身車轉(zhuǎn)速測量系統(tǒng)。該系統(tǒng)具有電路簡單、使用方便等特點。文中詳細(xì)介紹了該系統(tǒng)的工作原理,并且給出了它的硬件原理圖和軟件設(shè)計程序框圖。關(guān)鍵詞:轉(zhuǎn)速 單片機 測量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
標(biāo)簽： 單片機 中的應(yīng)用 轉(zhuǎn)速測量
上傳時間： 2013-11-02
上傳用戶：源弋弋
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