本文介紹一種采用智能數(shù)字溫度傳感器DS18B20進(jìn)行溫度采集,并通過單片機(jī)與PC機(jī)完成數(shù)據(jù)處理的系統(tǒng)。 硬件電路由四部分組成:溫度數(shù)據(jù)采集部分,即時(shí)溫度顯示驅(qū)動(dòng)部分,溫度數(shù)據(jù)存儲(chǔ)部分和上位PC機(jī)數(shù)據(jù)處理部分。整個(gè)硬件設(shè)計(jì)原理圖如圖1所示。
標(biāo)簽: 單片機(jī) 溫度采集 記錄系統(tǒng)
上傳時(shí)間: 2013-10-28
上傳用戶:wettetw
在測(cè)控領(lǐng)域中,經(jīng)常遇到監(jiān)測(cè)對(duì)象輸出信號(hào)較小,難以直接采集,一般都需要將其放大后再做處理。介紹了一種小信號(hào)采集系統(tǒng)的實(shí)現(xiàn)方法,利用具有A/D轉(zhuǎn)換功能的單片機(jī)STC25A60S2和具有精確放大功能的易用放大器AD620實(shí)現(xiàn)了最小系統(tǒng),并論述了系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn),詳細(xì)介紹了采集小信號(hào)的過程,并給出了實(shí)際應(yīng)用的例子,以及小信號(hào)采集在相關(guān)領(lǐng)域的應(yīng)用。
上傳時(shí)間: 2014-01-03
上傳用戶:xuanjie
基于FPGA的高速圖像數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)
標(biāo)簽: FPGA 圖像數(shù)據(jù)采集 系統(tǒng)設(shè)計(jì)
上傳時(shí)間: 2014-12-26
上傳用戶:devin_zhong
于FPGA和面陣CCD攝像頭的動(dòng)態(tài)光譜數(shù)據(jù)采集與預(yù)處理
上傳時(shí)間: 2013-10-16
上傳用戶:dongqiangqiang
本文是基于C8051F單片機(jī)的便攜式農(nóng)田基礎(chǔ)信息采集系統(tǒng)的設(shè)計(jì)方案,為了克服現(xiàn)有農(nóng)田綜合數(shù)據(jù)采集設(shè)備的移動(dòng)性差,高成本,使用復(fù)雜的不足,本文提供一種便攜嵌入式農(nóng)田基礎(chǔ)數(shù)據(jù)采集終端,該終端具有體積小、功耗低、攜帶性好、操作簡(jiǎn)單、安裝方便、模塊化和可擴(kuò)張性及網(wǎng)絡(luò)化功能,農(nóng)業(yè)生產(chǎn)管理人員可以隨意攜帶到田間地頭進(jìn)行使用。
標(biāo)簽: C8051F 單片機(jī) 便攜式 采集終端
上傳時(shí)間: 2013-11-09
上傳用戶:huyanju
基于單片機(jī)的多路數(shù)據(jù)采集系統(tǒng)
標(biāo)簽: 單片機(jī) 多路數(shù)據(jù)采集 系統(tǒng)設(shè)計(jì) 畢業(yè)論文
上傳時(shí)間: 2014-12-26
上傳用戶:龍飛艇
PC與單片機(jī)數(shù)據(jù)采集系統(tǒng)的USB通訊設(shè)計(jì)論文
標(biāo)簽: USB 單片機(jī) 數(shù)據(jù)采集系統(tǒng) 通訊設(shè)計(jì)
上傳時(shí)間: 2013-10-30
上傳用戶:hanli8870
便攜式信號(hào)采集在機(jī)器健康診斷系統(tǒng)中有較高的應(yīng)用價(jià)值。機(jī)器健康診斷的信號(hào)特點(diǎn)是包括低頻信號(hào)。本文研究是為了實(shí)現(xiàn)簡(jiǎn)易而且低成本的低頻便攜式信號(hào)采集。以Microchip公司單片機(jī)PIC18F1320為核心設(shè)計(jì)信號(hào)采集電路,實(shí)現(xiàn)了信號(hào)的采集和保存。系統(tǒng)采用串行電可擦除芯片24LC32A保存數(shù)據(jù),經(jīng)過有線通信,信號(hào)數(shù)據(jù)由串行口通過MAX232芯片輸送到微型計(jì)算機(jī)接收和保存,最后繪制出信號(hào)波形。 微型計(jì)算機(jī)程序采用Visual Basic編程。研究成功采樣頻率為3 kHz的復(fù)雜信號(hào),證明該方案符合設(shè)計(jì)要求。 Abstract: Portable signal acquisition is useful in machine health monitoring systems. The signal characteristics of machine health monitoring includes low frequency signals. The goal of this study is to realize simple, inexpensive and portable low frequency signal sampling. This paper provides the project of signal acquisition system design based on PIC18F1320 microcontroller manufactured by the Microchip Technology Incorporation to achieve signal sampling and storage. The system adopted EEPROM 24LC32A to store the signal data. The microcomputer received data via wired link with the MAX232 IC through the serial port. The microcomputer program, programmed in Visual Basic, received the data, stored it and plotted the signal. The study successfully samples 3kHz complicated signals and thus meets the design requirement.
上傳時(shí)間: 2013-11-19
上傳用戶:moerwang
為了使音頻信號(hào)分析儀小巧可靠,成本低廉,設(shè)計(jì)了以2片MSP430F1611單片機(jī)為核心的系統(tǒng)。該系統(tǒng)將音頻信號(hào)送入八階巴特沃茲低通濾波器,對(duì)信號(hào)進(jìn)行限幅放大、衰減、電平位移、緩沖,并利用一單片機(jī)負(fù)責(zé)對(duì)前級(jí)處理后的模擬信號(hào)進(jìn)行采樣,將采集得到的音頻信號(hào)進(jìn)行4 096點(diǎn)基2的FFT計(jì)算,并對(duì)信號(hào)加窗函數(shù)提高分辨率,另一單片機(jī)負(fù)責(zé)對(duì)信號(hào)的分析及控制顯示設(shè)備。此設(shè)計(jì)精確的測(cè)量了音頻信號(hào)的功率譜、周期性、失真度指標(biāo),達(dá)到較高的頻率分辨率,并能將測(cè)量結(jié)果通過紅外遙控器顯示在液晶屏上。 Abstract: o make the audio signal analyzer cheaper, smaller and more reliable, this system sends the audio signal to the eight-order butterworth filter, and then amplifies, attenuates, buffers it in a limiting range, transfers the voltage level of the signal before utilizing two MSP430F1611 MCU to realize the audio analysis. One is charged for sampling and dealing with the processed audio signal collected by the 4096 point radix-2 FFT calculation and imposes the window function to improve the frequency resolution. The other one controls the display and realizes the spectrum, periodicity, power distortion analysis in high resolution which is displayed in the LCD screen through the infrared remote control.
上傳時(shí)間: 2013-12-11
上傳用戶:jasonheung
為提高溫度測(cè)量效率,降低系統(tǒng)的成本,擴(kuò)展傳輸距離,設(shè)計(jì)出一種新型溫度采集系統(tǒng)。單片機(jī)通過控制具有單總線方式的溫度傳感器DS18B20實(shí)現(xiàn)對(duì)溫度的測(cè)量,同時(shí)單片機(jī)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(shí)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(shí)現(xiàn)遠(yuǎn)距離通信,易于系統(tǒng)的集成與擴(kuò)展。實(shí)驗(yàn)結(jié)果表明,該系統(tǒng)結(jié)構(gòu)簡(jiǎn)單、方便移植,能夠同時(shí)實(shí)現(xiàn)多達(dá)上百點(diǎn)溫度的測(cè)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(biāo)簽: 單總線 無線溫度 采集 系統(tǒng)設(shè)計(jì)
上傳時(shí)間: 2013-10-29
上傳用戶:515414293
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