Load sensitive spline shaft with sensory material

带传感材料的负载敏感花键轴

• 批准号: 466760574
• 负责人: Professor Dr.-Ing. Armin Lohrengel
• 金额: --
• 依托单位: Institut für Maschinenwesen
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/466760574?language=en
• 关键词: Load; sensitive; spline; shaft; sensory

The development and operation of highly resource-efficient machines greatly depends on the availability of high-quality information on the actual loads. Information gained directly from the critical parts in the field is the most valuable. This requires comprehensive digitization of machines, which in itself depends on inexpensive and readily available measuring systems. A major challenge in the development of such systems is energy self-sufficiency; conventional systems like strain gauges require a constant electrically powered measurement operation at high frequency. In the context of priority program 2305 "Sensor-integrating machine elements" (SiME), a material-integrated, sensory peripheral zone condition on a splined shaft as a possible solution satisfying the stated requirements featuring drastically lowered power demand compared to state of the art technology is researched. The principle of the sensor material is based on a structural transformation from metastable austenite to martensite when stressed above a limit load. The structural transformation can be detected via eddy-current analysis. The sensory material stores the load information, requires no electric power supply and can be read at arbitrary intervals.. The sensory material peripheral zone can tailored locally by laser heat treatment. The research program shall establish the possibility of developing reproducible SiME via material sensors characterized by low power requirements, high quality of information, and negligible impact on the main function of the machine element. Focus lies on the methodological study of structural design for incorporation, the analysis of the sensors impact on the machine element, and the certification of the sensor material. Verification is achieved using an energy efficient prototype eddy current reader unit powered by energy harvesting developed in the project on shaft-hub connection specimens in a test rig. Finally, the updateability and the expandability concerning further measurands is considered.

高资源效率机器的开发和运行在很大程度上取决于实际负载的高质量信息的可用性。直接从现场关键部分获得的信息是最有价值的。这需要机器的全面数字化，这本身取决于廉价且易于使用的测量系统。开发此类系统的一个主要挑战是能源自给自足；应变仪等传统系统需要高频持续电动测量操作。在优先计划 2305“传感器集成机器元件”(SiME) 的背景下，研究了花键轴上的材料集成、传感外围区域条件，作为满足既定要求的可能解决方案，其特点是与最先进的技术相比，大大降低了功率需求。传感器材料的原理是基于当应力超过极限载荷时从亚稳奥氏体到马氏体的结构转变。结构转变可以通过涡流分析来检测。传感材料存储负载信息，不需要电源并且可以以任意间隔读取。传感材料外围区域可以通过激光热处理进行局部定制。研究计划应建立通过材料传感器开发可复制 SiME 的可能性，这些传感器具有低功耗、高质量信息以及对机器元件主要功能的影响可忽略不计的特点。重点在于整合结构设计的方法学研究、传感器对机器元件影响的分析以及传感器材料的认证。验证是使用节能原型涡流读取器单元实现的，该单元由在测试台中的轴毂连接样本项目中开发的能量收集提供动力。最后，考虑了有关进一步被测量的可更新性和可扩展性。