SBIR Phase I: Microminiature, High Resolution, Passive Peak Strain Detector for Smart Structures and Materials

SBIR 第一阶段：用于智能结构和材料的微型、高分辨率、无源峰值应变探测器

• 批准号: 9861020
• 负责人: Steven Arms
• 金额: $ 9.99万
• 依托单位: MICROSTRAIN INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9861020&HistoricalAwards=false
• 关键词: SBIR; Phase; Microminiature; Resolution; Passive

9861020 This Small Business Innovation Research Phase I project is aimed at combining hermetically packaged differential variable reluctance transducers capable of peak strain detection (DVRT-PD's) with shape memory alloy (SMA) actuators to produce improved passive peak strain detectors which can withstand harsh environmental conditions (moisture, salt, and vibration) and can be reset for repeated uses. Critical civil and military structures require "smart" sensors in order to report their strain histories; this can help to insure safe operation after exposure to potentially damaging loads (such as earthquakes, hurricanes, military action, etc.). Sensors in smart structures generally require system power in order to operate, but if power outages occur, in a loss of key data may result. Therefore, sensors which can record peak information without power (passively) are needed. Previous passive peak strain detectors have relied on measuring the magnetic properties of transformation induced plasticity (TRIP) steels. However, these devices have several drawbacks, including bulky size, low resolution, high nonlinearity, and a one time use limitation due to material yielding. The research will address these problems by using modified, microminiature, DVRT PD's. A Phase 0 study was performed using bonded resistance strain gauges as a standard; DVRT-PD's were found to be repeatable, fast, and accurate. Health monitoring has the potential to greatly enhance the safety and life of military, aerospace, and civil structures. Sensate structures equipped with passive networks of peak strain, acceleration, pressure, and torque measurement devices, could be interrogated for their response to test loads or potentially damaging events, and either replaced, or their embedded sensors reset for future interrogation. Applications include health monitoring of composite structures, aircraft, bridges, dams, and buildings. Military and commercial market potential for these systems is significant.

9861020 该小型企业创新研究第一阶段项目旨在将能够进行峰值应变检测的密封封装差分可变磁阻传感器（DVRT-PD）与形状记忆合金（SMA）致动器相结合，以生产改进的无源峰值应变检测器，该检测器可以承受恶劣的环境条件（潮湿、盐和振动），并且可以重置以重复使用。 关键的民用和军用结构需要“智能”传感器来报告其应变历史;这有助于确保在暴露于潜在破坏性载荷（如地震、飓风、军事行动等）后的安全运行。 智能结构中的传感器通常需要系统电源才能运行，但如果发生断电，可能会导致关键数据丢失。 因此，需要能够在没有功率的情况下（被动地）记录峰值信息的传感器。 以前的被动峰值应变探测器依赖于测量相变诱发塑性（TRIP）钢的磁性能。 然而，这些装置具有若干缺点，包括体积庞大、低分辨率、高非线性以及由于材料屈服而导致的一次性使用限制。 该研究将解决这些问题，通过使用修改后，微型，DVRT PD的。 使用粘合电阻应变片作为标准进行了0期研究;发现DVRT-PD具有可重复性、快速性和准确性。 健康监测有可能大大提高军事、航空航天和民用结构的安全性和寿命。 配备有峰值应变、加速度、压力和扭矩测量设备的无源网络的传感器结构可以被询问其对测试负载或潜在破坏事件的响应，并且被替换或其嵌入式传感器重置以用于未来的询问。 应用包括复合结构、飞机、桥梁、水坝和建筑物的健康监测。 这些系统的军事和商业市场潜力巨大。