單片機畢業(yè)設(shè)計外文翻譯---基于at89s51單片機的微型土壤濕度檢測儀設(shè)計-單片機-展示頁
2025-01-31 07:59本頁面
【正文】 odules. Proteus software platform based on the design of the system is simulated, and the results show that the system hardware and software design correct and reliable operation. Keywords: soil humidity。 SCM。 simulation TP202 classification number: Chinese Literature identification code: A Section 1 Introduction Agricultural production in the economic development of our country has important position, for farmers Industry production to provide timely and reliablly technical service has bee the heavily meteorological department To response one. Along with the national governments at all levels of agricultural production increasingly heavier Depende on the service, my unit also serve for agriculture, promote for increasing farmers39。s quality of life is getting much more better, flowers has bee a fashion. Flowers can not only enrich people39。s relative humidity 0% ~ 100% RH, its corresponding Output is 0 ~ 100mV [1]. According to the integrated amp with phase ratio amplification gain: Kf=R1+ Rf =1+ 47 =48 Then the output amplification V0 = 48 analog signal voltage, so output analog, Vi, electric pressure fan letter surrounded is 0 ~ . This mode, turn into A/D CH0 slice of replace core general way into line changeover place, have cut to several words AT89S51 singlechip letter Numbers again into data processing and the LCD. A/D conversion chip choice and controlling principle This article chooses A/D conversion chips for ADC0832, this chip is 8 Pin double row straight insert dual channel A/D converter, can separately for both road simulation No real now believe d/a change, can use in the ocl lose into mode and bad points to lose Under the way of DI server channel selected choose, several according to adopt sets and Data transfer [2]. The work of ADC0832 do sequence as shown in figure 3. Root according to our web site, when covariance .ADC0832 did not work, must the piece selected in the high level, the CS When chip disabled. When should undertake A/D conversion shall be piece selected end CS offsets In low level and maintains to convert over. Chip began to work, still need to make Monolithic machine to core chips, when the clock CLK lose faith in the clock pulse blunt when lose, In the first clock pulse before the sinking DI end must be high electric flat, tables And start signal. In the first 2, 3 pulse sinking DI end before should be lost Into two data used to select channels function. Channels are as follows: (1) the controlled conditions In accordance with The Times when DI lost with 1, 0, the only way to do CH0 tong general turned into single wordChange。 (3) when DI ordinal 0, 0, will CH0 as is, will CH0 input 0 as its negative input IN CH1 , as are the input IN + microcontroller’ s choice MCU is the control of core, pared with the others ,we chose AT89S51 singlechip microputer. The advantages of this type of singlechip microputer is [3] : (1) The singlechip microputer and the 8051 series microcontroller is fully patible, make it use easily, and into the ten points Cheap。 (3) has the low consumption working methods and to be achieved Off electrical automatic protection。 Very low power consumption (work current Only mA)。 Small volume (can show 16 x 2 words Operators). Its characters are displayed by internal special displacement function of HD44780 dynamic core slice [4] Quasi ASCII put into their number within department set into reservoir with deposit according to show and editor (DDRAM), inside the ministry accused of line of road will m
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1