Miniature magneto-mechanical resonators for wireless tracking and sensing

• 成果类型: Article
• 署名作者: Gleich, Bernhard; Schmale, Ingo; Nielsen, Tim; Rahmer, Juergen
• 署名单位: Philips; Philips Research
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9463
• DOI: 10.1126/science.adf5451
• 发表日期: 2023-06-02
• 页码: 966-971
• 关键词: behavior; SYSTEM

摘要

Sensor miniaturization enables applications such as minimally invasive medical procedures or patient monitoring by providing process feedback in situ. Ideally, miniature sensors should be wireless, inexpensive, and allow for remote detection over sufficient distance by an affordable detection system. We analyze the signal strength of wireless sensors theoretically and derive a simple design of high-signal resonant magneto-mechanical sensors featuring volumes below 1 cubic millimeter. As examples, we demonstrate real-time tracking of position and attitude of a flying bee, navigation of a biopsy needle, tracking of a free-flowing marker, and sensing of pressure and temperature, all in unshielded environments. The achieved sensor size, measurement accuracy, and workspace of similar to 25 centimeters show the potential for a low-cost wireless tracking and sensing platform for medical and nonmedical applications.