單片機(jī)外文翻譯----at89c51單片機(jī)控制的恒溫水域溫控系統(tǒng)-單片機(jī)(完整版)
【正文】 iness of processing capacity punching equipment, punching equipment to the processing capacity as well as equipment based on the work table to consider the standard form of mold, practicality and versatility will be higher. In the threedimensional mold standard parts library has been established under the premise of the establishment of standards moldbase much to the convenience and quick. First of all, to enter the Pro / ASSMBLY equipped) mode, with the establishment of similar munities standard parts, the specific path for the operation: ASSMBLY (ponents) Family Tab (Family Table additem (additional items)) Component (ponent), and then choose to change to take place in the assembly of parts or ponents as the assembly of the project group table, and in the assembly do not need to change family (such as fasteners) you do not need to select. instances in the assembly of the assembly according to the agreed relationship between the automatically generated . other 5 aircraft such as the bending modulus, tensile modulus planes. Taking full account of this, pressing equipment and typical performance parameters under the premise of stamping parts, you can use the same solution to create a standard mold base. 3 Conclusion At present, some colleges and universities as a result of provincial funding in the strained devices, laboratory equipment, more backward, in chemistry and chemical engineering laboratories still use a contact thermometer to control water temperature. In order to overe the factors that a lot of inconvenience to the original based on the old thermostat has been designed transformation of waters. Proved by the use of the design， to meet the current chemistry, chemical engineering and research needs of the experimental results. 6 AT89C51 單片機(jī)控制的恒溫水域溫控系統(tǒng) 針對(duì)化工早期接點(diǎn)溫度計(jì)恒溫水域控溫存在的缺點(diǎn)，本文介紹了一種基于AT89C51 單片機(jī)為主控制器，結(jié)合 AD590J 集成溫度傳感器等組成的恒溫水域溫控系統(tǒng)。該電流轉(zhuǎn)換為電壓信號(hào)，通過模數(shù)轉(zhuǎn)換 ADC080 AT89C51 單片機(jī)實(shí)現(xiàn)溫度的監(jiān)測(cè)和轉(zhuǎn)換。而單結(jié)晶體管的振蕩頻率受比例放 大器輸出電壓控制， AT89C51 單片機(jī)通過溫度設(shè)定值與溫度采樣值比較后的差值，經(jīng)比較放大后產(chǎn)生隨溫度變化的電壓值來(lái)調(diào)解可控硅的導(dǎo)通角，從而實(shí)現(xiàn)對(duì)加熱功率的調(diào)節(jié)，滿足了恒溫水域的恒溫要求。其中設(shè)定子程序完成溫度的設(shè)定功能。 族表功能使三維模具標(biāo)準(zhǔn)件庫(kù)及標(biāo)準(zhǔn)模架庫(kù)的建立和使用成為很方便的事情。各企業(yè)可以根據(jù)模具設(shè)計(jì)需要建立自己的三維模具標(biāo)準(zhǔn)件庫(kù)。 結(jié)束語(yǔ) 目前，部分省屬高校由于設(shè)備經(jīng)費(fèi)較緊張、實(shí)驗(yàn)設(shè)備較落后，化學(xué)化工實(shí)驗(yàn)室仍使用著接點(diǎn)溫度計(jì)控制恒溫水域。其它的如彎曲模架、拉伸模架。類屬模型未在族表中被包含的項(xiàng)目在每個(gè)實(shí)例中會(huì)根據(jù)設(shè)計(jì)意圖自動(dòng)生成，族表的另一個(gè)優(yōu)點(diǎn)是不論創(chuàng)建一個(gè)新表還是修改一個(gè)已有的表，都可以向表中添加項(xiàng)目。 3)從一個(gè)零件文件生成系列變化，不必重新創(chuàng)建和生成每個(gè)零件。 軟件設(shè)計(jì) 軟件部分主要包括初始化、設(shè)定子程序、恒溫處理子程序、顯示子程序。 每一個(gè)設(shè)定7 按鍵除與 8255 的 IO 口相連外，還通過一個(gè)與門與 AT89C51 的定時(shí)器 T0 相連，以便當(dāng)按鍵按下后立即向 AT89C51 申請(qǐng)中斷，查詢 8255 口狀態(tài)，同時(shí)進(jìn)行相應(yīng)的功能控制。 溫度采樣電路 溫度采樣電路采用了 AD590 電流型溫度敏感型器件其穩(wěn)定度和線性度均較好。 temperature: ℃ 。 化學(xué)、化工實(shí)驗(yàn)及其研究對(duì)恒溫水域的性能及精度要求很高，而目前市場(chǎng)上面對(duì)化學(xué) 、化工實(shí)驗(yàn)及研究的恒溫水域系統(tǒng)價(jià)格很高。其中電阻 R 采用低溫度系數(shù)計(jì)量電阻，溫度系數(shù)為 10 l0_6／℃。 驅(qū)動(dòng)電路 當(dāng) 8255 相應(yīng) IO口輸出高電平時(shí)，驅(qū)
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