【正文】 A water meter adopt reflected photoelectric automatic multiple water meter calibration system based on microcontroller with standard water meter as the matrices． However， the matrices are damaged after using a period of time， thus affecting the accuracy of the calibration． With the continuous progress of the era， the use of noncontact or no wear and tear flowmeters instead of the standard meter as the matrices is a new trend and the establishment of an noncontact or no wear and tear flowmeter as the matrices to a meter verification system not only can be a good solution to the problem of mechanical wear， but also increase the detected precision． The meter calibration system stability of the matrices is of the most importance． In order to reduce these impact on the stability of the electromagic flowmeter， the meter calibration system with the design of electromagic flowmeter volume parison reduce stability of electromagic flowmeter． This kind of water meter calibration system about electromagic flowmeter volume parison base on the integrated technology such asmechanical technology ， sensor technology ， singlechip microputer technology ， drive technology and interface technology． More， it uses LPC9401 SCM to control solenoid valve so as to control the pros and cons of electric telescopic cylinders． The buttons to control SCM make solenoid valve gain power， while water pipe to get water run into measuring tank when water flow is stable． electromagic flowmeter begin to count when the electromagic flow meter reaches the design flow， it sends a signal to the SCM to control solenoid valve to loss power． the cylinder push forward water pipe to get out of the measuring tank and make parison between the water volume and the design flow to get putational error． The design of this product is the reversing mechanism about cylinder to promote water，including mechanical parts and electric control parts． Electric control sections include the choice of SCM and sensors etc and the design of the circuit and software design about control system． also need to do a lot of experiments， research using electromagic flowmeter verification under various traffic rule and find out the appropriate test method． To volume ratio on water meter calibration system at the same time often program debug and experiment． find out main factors， puts forward improvement scheme． Keywords: calibration, displacement, microcontroller, electromagic flowmeter III 目 錄 第 1 章 緒論 ................................................................. 1 引言 ................................................................ 1 研究背景 ............................................................ 1 主要研究內容 ......................................................... 2 第 2 章 穩(wěn)定性與流量關系 實驗 ................................................. 3 電磁流量計簡介 ....................................................... 2 穩(wěn)定性與流量關系 實驗數(shù)據(jù)分析 ........................................ 4 各種流量測量實驗數(shù)據(jù)分析 ....................................... 5 各種流量 同一裝夾下多次測量 ............................... 5 各種流量重新裝夾下測量 ................................... 5 大流量多工位測量 ......................................... 6 影響因素的分 析 ................................................. 6 第 3 章 換向機構機械部分設計 ................................................. 8 換向機構簡介 ........................................................ 8 機械部分的執(zhí)行元件確定 .............................................. 8 換向機構方案確定 .................................................... 8 水管兩點布局分布 ............................................... 8 連桿推動方案 .................................................. 10 杠桿推動方案 .................................................. 11 氣缸擺動推動方案 .............................................. 13 間隙法氣缸直接推動方案 ........................................ 14 氣缸固定方案的確定 ................................................. 15 在計量桶外固定氣缸方案 ........................................ 15 在計量桶上固定氣缸方案 ........................................ 15 機械部份的計算與設計選型 ........................................... 16 水管移動速度與所需力的計算 .................................... 16 氣缸的選型 .................................................... 17 氣缸連接件的設計 .............................................. 17 螺栓強度校核 .................................................. 18 第 4 章 換向機構電路控制部分設計 ............................................ 19 控制方案 ........................................................... 19 電子元件的選擇 ..................................................... 19 單片機的 選用 .................................................. 19 IV 電磁閥的 選用 .................................................. 20 繼電器的選用 .................................................. 21 光電耦合器 的 選用 .............................................. 21 穩(wěn)壓器 的 選用 .................................................. 21 換向機構 電路設計部分 ............................................... 22 繼電器控制電路 ................................................ 22 脈沖采集電路 .................................................. 23 電源電路 ...................................................... 23 程序設計編寫及調試與實驗 ........................................... 24 主程序介紹及其流程框圖 ....................................... 24 鍵盤中斷程序介紹及其流程框圖 ................................. 25 脈沖采集中斷程序介紹及其流程框圖 ............................. 27 模擬程序的編寫 ............................................... 28 程序 調試與 容積 實驗 ........................................... 28 程序 調試 ................................................ 28 容積比對 實驗 ............................................ 29 總 結 ...................................................................... 30 參考文獻 ................................................................... 31 謝 辭 ...................................................................... 32 附錄一： 穩(wěn)定性與流量關系 實驗數(shù) 據(jù) .