霍尔传感器EST248英文手册

智能假肢的控制系统研究宋丽涵;徐明铭【摘要】随着智能控制技术、计算机技术、机械制造和传感器技术的快速发生,诞生了一种辅助运动装置即智能假肢,其协调控制能力直接影响了截肢患者的日常生活,目前常见的假肢包括半主动式假肢、被动式假肢和主动式假肢等,但是考虑到准确度、成本以及灵敏性等限制,智能性被动型假肢膝关节是最常见的类型。

文章通过对人体行走的步态特征和识别模式进行分析,介绍假肢膝关节和踝关节的结构以及控制气缸的工作原理,建立不同步速状态下的控制策略。

同时将手动控制调试系统和上位机调试模式结合起来,以临床模拟的方式验证人类行走步态,实现膝踝的协调控制。

【期刊名称】《太原学院学报：自然科学版》【年(卷),期】2017(035)003【总页数】5页(P22-26)【关键词】智能假肢;步态识别;膝踝协调控制【作者】宋丽涵;徐明铭【作者单位】莆田学院机电工程学院,福建莆田351100【正文语种】中文【中图分类】TP2引言如何像正常人一样运动一直是截肢者关注的问题,智能假肢就是在人工智能技术、现代控制技术、生物医疗工程、计算机技术等多学科共同发展的背景下产生的最佳辅助器械。

目前,世界医疗器械市场中已经有比较丰富的智能假肢产品,但是多数产品侧重于膝关节的作用,良好实现膝踝关节协调运动的假肢还比较少,穿戴困难、易损坏、控制不协调等都是智能假肢控制中比较突出的问题。

因此,深入研究智能假肢的控制系统的实现模式对推进智能假肢的发展具有重要的理论与实践价值[1]。

1 下肢运动特征以及人体步态识别1.1 运动特征人体下肢运动具有非常强的协调性,下肢运动同时调动多个部分的力量,包括上肢、躯干、骨盆、下肢关节以及集群。

下肢运动同时依靠肌肉、中枢神经、骨骼和周围神经系统的作用实现协调运动。

下肢运动与上肢运动不同,它属于一种无意识的运动,具有可重复性、周期性和约束性,常见的下肢运动包括上下楼梯、平底行走等,这也是下肢运动障碍人群最大的辅助需求,是智能假肢的核心功能[2]。

Document Number: 57054For technical questions, contact: sfer@248, 249Vishay Spectrol1/2" (12.7 mm) Conductive Plastic & CermetPotentiometersFEATURES•Model 248/249 retains the proven highperformance characteristics in a more cost effective package•Cost effective panel potentiometers •P.C.B. mounting potentiometersDIMENSIONS in millimeters (inches)METAL OR PLASTIC SHAFTSD = REAR LOCATING LUGSE = REAR STAND OFFX = STANDARD LEADS For technical questions, contact: sfer@Document Number: 57054248, 249Vishay Spectrol1/2" (12.7 mm) Conductive Plastic & CermetPotentiometersMECHANICAL SPECIFICATIONSRotation 295° ± 5°TorqueStarting and Running 1.5 to 18.75 mNm End Stop Torque 0.35 Nm (50 oz-in)Weight8.3 g’s (0.29 oz)(1/4" × 7/8" FMF metal shaft)Max Tightening Torque 0.50 Nm (1/4" Bush)0.70 Nm (3/8" Bush)SealingIP50ENVIRONMENTAL SPECIFICATIONSTemperature Range - 55 °C to + 125 °C Shock 390 meters/sec/sec. 1000 bumpsVibrations98 meters/sec/sec. 0.75 mm, 10 to 500 Hz Rotational Life (Electrical)25 000 cycles Load Life at 70 °C1000 hoursMARKINGUnit identification: Manufacturer’s name and model number, EIA resistance value coding, tolerance, data code and terminal Identification .ELECTRICAL SPECIFICATIONSPARAMETER MODEL 248MODEL 249Element Typeconductive plasticcermetTotal Resistance Range 500 Ω to 1 M ΩResistance Tolerance ± 20 %± 20 % (on request ± 10 %)Power rating0.5 W at 70 °C 1.0 W at 70 °CBoth derated to zero at 125 °CTemperature Coefficient of Resistance ± 1000 ppm/°C ± 100 ppm/°CLinearity Tolerance± 5 % Independent Contact Resistance Variation 5 % of the T otal Resistance Insulation Resistance 1000 M Ω minimum, 500 VDC Dielectric Strength 750 V RMS minimum 50/60 Hz End Resistance2 Ω maximum each endEffective Electrical Angle265° ± 5°STANDARD RESISTANCE ELEMENT DATAΩ248/249:500R, 1K, 2K, 5K, 10K, 25K, 50K, 100K, 250K,500K, 1MPACKAGINGCarton box of 50, code: BO50ORDERING INFORMATION248MODEL JESPECIAL FEA TURES 8SHAFT OPTIONS 08FMF SHAFT OPTIONS 103EIA RESIST ANCE CODEe3LEAD FINISH 248/249D: Rear locating lugs E: Rear stand off J: CW audio taper7: 6.35 (1/4") plastic 8: 3.18 (1/8") plated brass9: 6.35 (1/4") plated brass08: 19.05 (3/4") for3.18 (1/8") plated brass 10: 22.22 (7/8") for6.35 (1/4") plated brass or plastic versionse3: pure SnExample: 248 - JE - 8 - 08 - 103Disclaimer Legal Disclaimer NoticeVishayAll product specifications and data are subject to change without notice.Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product.Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products.No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.Product names and markings noted herein may be trademarks of their respective owners.元器件交易网Document Number: 。