普通螺紋有粗牙(ya)(ya)和細牙(ya)(ya)之分，同一公稱直徑可以有多種螺距(ju)，其中大螺距(ju)者稱為粗牙(ya)(ya)螺紋，其余均為細牙(ya)(ya)螺紋。
粗牙(ya)螺紋(wen)可以理解為，當螺紋(wen)規格確定時，螺距P選取允(yun)許的大值時的螺紋(wen)。
例如 ，M12規格(ge)的(de)螺紋，螺距可以選(xuan)擇1.75、1.5和1。M12×1.75即(ji)為(wei)(wei)粗牙螺紋，M12×1.5 、M12×1即(ji)為(wei)(wei)細牙螺紋。對(dui)于粗牙螺紋，可以省略標注其螺距項。(此例均為(wei)(wei)公制螺紋)。
檢(jian)(jian)測(ce)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong) ①硬件(jian)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong) 螺(luo)(luo)(luo)紋(wen)(wen)(wen)參(can)數(shu)自(zi)動(dong)檢(jian)(jian)測(ce)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)基于PC架構，主要由照明(ming)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)、CCD相(xiang)機和光(guang)路成(cheng) 像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)、圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)采集(ji)卡、圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)處理(li)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)、機械檢(jian)(jian)測(ce)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)以(yi)及電控(kong)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)等組成(cheng)。 測(ce)量時，經照明(ming)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)照明(ming)后，通過CCD相(xiang)機和光(guang)路成(cheng)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)采集(ji)緊固件(jian)的(de)螺(luo)(luo)(luo)紋(wen)(wen)(wen)圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)， 然后經過圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)采集(ji)卡，將(jiang)數(shu)字化(hua)(hua)圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)傳(chuan)到計(ji)算機，計(ji)算機對該(gai)數(shu)字圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)按相(xiang)應算法(fa)(fa)(fa)處 理(li)后，計(ji)算出(chu)(chu)螺(luo)(luo)(luo)紋(wen)(wen)(wen)的(de)牙型(xing)角、螺(luo)(luo)(luo)距和中徑等參(can)數(shu)，并(bing)與標準進行比較，計(ji)算出(chu)(chu)偏(pian)差。 ②軟(ruan)件(jian)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong) 螺(luo)(luo)(luo)紋(wen)(wen)(wen)參(can)數(shu)自(zi)動(dong)檢(jian)(jian)測(ce)的(de)軟(ruan)件(jian)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)主要包(bao)括系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)控(kong)制(zhi)模塊(kuai) 圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)處理(li)模塊(kuai)等。 系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)控(kong)制(zhi)模塊(kuai)：初始(shi)化(hua)(hua);完成(cheng)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)接口卡及標準參(can)數(shu)的(de)初始(shi)化(hua)(hua)配置。圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)操作; 采集(ji)并(bing)保存(cun)8位的(de)灰色圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，捕獲圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)到內存(cun)。 圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)處理(li)模塊(kuai)：圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)處理(li)模塊(kuai)包(bao)括減少(shao)噪聲(sheng)、突出(chu)(chu)螺(luo)(luo)(luo)紋(wen)(wen)(wen)輪廓邊(bian)緣信(xin)息的(de)圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)預處理(li)算 法(fa)(fa)(fa)，檢(jian)(jian)測(ce)和提取(qu)輪廓邊(bian)緣信(xin)息的(de)邊(bian)緣檢(jian)(jian)測(ce)和提取(qu)算法(fa)(fa)(fa)，測(ce)量數(shu)字圖(tu)(tu)像(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)實際尺寸的(de)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong) 標定算法(fa)(fa)(fa)，以(yi)及用于計(ji)算螺(luo)(luo)(luo)紋(wen)(wen)(wen)參(can)數(shu)的(de)算法(fa)(fa)(fa)等。
在線客服
