可吸收縫合線的線徑在線檢測及控制技術(shù)
發(fā)布時間：2019-03-10 17:54
【摘要】：殼聚糖-膠原蛋白可吸收縫合線由于其可塑性強(qiáng)、組織相容性好及可降解的特性,被廣泛地應(yīng)用在需要內(nèi)縫合的手術(shù)中。而在縫合線成形和纏繞過程中,對縫合線線徑進(jìn)行檢測及控制是保證線徑均勻和抗張強(qiáng)度不變的前提。傳統(tǒng)的紡絲成形工藝山于缺乏對紡絲工藝關(guān)鍵技術(shù)的掌握,噴絲速度不易控制,導(dǎo)致成形后的可吸收縫合線線徑粗細(xì)不均,嚴(yán)重影響其推廣應(yīng)用。傳統(tǒng)測量是在縫合線實(shí)驗(yàn)臺上進(jìn)行離線測量,測量周期長、速度慢,無法實(shí)現(xiàn)閉環(huán)控制。本文研究一種可吸收縫合線的線徑在線檢測與控制技術(shù),實(shí)現(xiàn)在紡絲成形過程中對線徑進(jìn)行閉環(huán)控制及在線檢測,提升控制系統(tǒng)精度,保證成品殼聚糖-膠原蛋白可吸收縫合線線徑均勻。可吸收縫合線紡絲成形中的線徑閉環(huán)控制系統(tǒng)包括核心控制模塊、噴絲裝置、線徑檢測模塊三部分。其中線徑檢測模塊通過對待測縫合線進(jìn)行光學(xué)成像,由基于ARM Cortex-M3核心的32位微控制器STM32F103ZET6驅(qū)動線陣CCD圖像傳感器TCD1209D對光強(qiáng)信息進(jìn)行采集,將采集的電信號通過信號調(diào)理后由片內(nèi)AD進(jìn)行A/D轉(zhuǎn)換,通過采用基于遺傳算法的二值化圖像分割的方法進(jìn)行數(shù)據(jù)處理,再經(jīng)過線徑計(jì)算,最終獲得可吸收縫合線的線徑測量值,實(shí)現(xiàn)線徑的在線測量。設(shè)計(jì)一種以反串聯(lián)雙液壓缸為主體結(jié)構(gòu)的噴絲裝置,通過線徑檢測模塊獲得殼聚糖-膠原蛋白可吸收縫合線的線徑測量值,將線徑測量值送入以STM32F103ZET6為核心的控制模塊中,由改進(jìn)的廣義預(yù)測控制算法控制噴絲裝置中直流伺服電機(jī)的轉(zhuǎn)速,進(jìn)而調(diào)節(jié)噴嘴的噴絲速度,獲得與線徑設(shè)定值一致的初生態(tài)絲。初生態(tài)絲經(jīng)一系列工藝流程后獲得成品的可吸收縫合線,實(shí)現(xiàn)對殼聚糖-膠原蛋白可吸收縫合線成形過程中線徑的閉環(huán)控制�？晌湛p合線的線徑在線檢測與控制技術(shù)實(shí)現(xiàn)了針對可吸收縫合線的非接觸式在線測量,完成了在紡絲成形過程中的閉環(huán)控制,同時保證了成品可吸收縫合線的線徑符合中華人民共和國醫(yī)藥行業(yè)標(biāo)準(zhǔn)YY1116-2010《可吸收性外科縫線》的要求,系統(tǒng)誤差精度可控制在2%內(nèi),成品可吸收縫合線線徑均勻。本論文在提升國內(nèi)醫(yī)療水平和針對縫合線的科學(xué)研究方面具有重要意義。
[Abstract]:Chitosan-collagen absorbable suture is widely used in internal suture because of its good plasticity, good histocompatibility and biodegradability. In the process of stitch forming and winding, the measurement and control of stitch diameter is the premise to ensure uniform diameter and constant tensile strength. The traditional spinning process is inferior to the lack of master of the key technology of spinning technology, and the speed of spinning is not easy to control, which results in the uneven diameter of absorbable stitch after forming, which seriously affects its popularization and application. The traditional measurement is off-line measurement on the sewing line experimental platform. The measurement period is long and the speed is slow, so the closed-loop control can not be realized. In this paper, a kind of on-line measurement and control technology for the diameter of absorbable stitches is studied. The closed-loop control and on-line detection of the diameter of the wire are realized in the spinning process, and the precision of the control system is improved. The final chitosan-collagen can be absorbed and sutured evenly in diameter. The closed loop control system of wire diameter in absorbable stitch spinning is composed of three parts: core control module, spinneret device and wire diameter detection module. In the line diameter detection module, optical imaging is carried out by treating the seam line, and the light intensity information is collected by the linear CCD image sensor TCD1209D driven by the 32-bit microcontroller STM32F103ZET6 based on the core of ARM Cortex-M3, which is driven by the linear CCD image sensor TCD1209D. The collected electrical signals are converted by on-chip AD after signal conditioning. The data are processed by binary image segmentation method based on genetic algorithm, and then the line diameter is calculated. Finally, the line diameter measurement value of the absorbable suture is obtained, and the on-line measurement of the line diameter is realized. A wire spraying device with double hydraulic cylinders in reverse series is designed. The wire diameter measurement value of chitosan-collagen absorbable suture is obtained by wire diameter detection module, and the wire diameter measurement value is put into the control module with STM32F103ZET6 as the core. The improved generalized predictive control (GPC) algorithm is used to control the rotational speed of the DC servo motor in the spinneret, and then to adjust the jet speed of the nozzle, and to obtain the primary ecological filament which is consistent with the setting value of the wire diameter. The absorbable suture of the finished product was obtained by a series of technological processes, and the closed-loop control of the diameter of the absorbable suture was realized during the process of forming chitosan-collagen absorbable suture. The non-contact on-line measurement of absorbable suture is realized by the on-line measurement and control of the diameter of the absorbable suture, and the closed-loop control in the spinning process is completed. At the same time, the diameter of absorbable suture can meet the requirements of YY1116-2010 (absorbable surgical suture), the precision of system error can be controlled within 2%, and the diameter of absorbable suture is uniform. This paper is of great significance in improving the level of domestic medical treatment and scientific research on suture.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：R318.08
本文編號：2437846
[Abstract]:Chitosan-collagen absorbable suture is widely used in internal suture because of its good plasticity, good histocompatibility and biodegradability. In the process of stitch forming and winding, the measurement and control of stitch diameter is the premise to ensure uniform diameter and constant tensile strength. The traditional spinning process is inferior to the lack of master of the key technology of spinning technology, and the speed of spinning is not easy to control, which results in the uneven diameter of absorbable stitch after forming, which seriously affects its popularization and application. The traditional measurement is off-line measurement on the sewing line experimental platform. The measurement period is long and the speed is slow, so the closed-loop control can not be realized. In this paper, a kind of on-line measurement and control technology for the diameter of absorbable stitches is studied. The closed-loop control and on-line detection of the diameter of the wire are realized in the spinning process, and the precision of the control system is improved. The final chitosan-collagen can be absorbed and sutured evenly in diameter. The closed loop control system of wire diameter in absorbable stitch spinning is composed of three parts: core control module, spinneret device and wire diameter detection module. In the line diameter detection module, optical imaging is carried out by treating the seam line, and the light intensity information is collected by the linear CCD image sensor TCD1209D driven by the 32-bit microcontroller STM32F103ZET6 based on the core of ARM Cortex-M3, which is driven by the linear CCD image sensor TCD1209D. The collected electrical signals are converted by on-chip AD after signal conditioning. The data are processed by binary image segmentation method based on genetic algorithm, and then the line diameter is calculated. Finally, the line diameter measurement value of the absorbable suture is obtained, and the on-line measurement of the line diameter is realized. A wire spraying device with double hydraulic cylinders in reverse series is designed. The wire diameter measurement value of chitosan-collagen absorbable suture is obtained by wire diameter detection module, and the wire diameter measurement value is put into the control module with STM32F103ZET6 as the core. The improved generalized predictive control (GPC) algorithm is used to control the rotational speed of the DC servo motor in the spinneret, and then to adjust the jet speed of the nozzle, and to obtain the primary ecological filament which is consistent with the setting value of the wire diameter. The absorbable suture of the finished product was obtained by a series of technological processes, and the closed-loop control of the diameter of the absorbable suture was realized during the process of forming chitosan-collagen absorbable suture. The non-contact on-line measurement of absorbable suture is realized by the on-line measurement and control of the diameter of the absorbable suture, and the closed-loop control in the spinning process is completed. At the same time, the diameter of absorbable suture can meet the requirements of YY1116-2010 (absorbable surgical suture), the precision of system error can be controlled within 2%, and the diameter of absorbable suture is uniform. This paper is of great significance in improving the level of domestic medical treatment and scientific research on suture.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：R318.08
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