一种基于RFID涡流传感器的螺栓预紧力无源无线监测方法
By using a passive wireless monitoring method based on RFID eddy current sensors, bolt preload can be estimated in real time. This solves the problems of intrusiveness and wired connection in traditional monitoring technologies, enabling non-intrusive installation and wireless monitoring. It is adaptable to complex working conditions and reduces deployment costs and maintenance difficulty.
CN122409042APending Publication Date: 2026-07-17UNIV OF ELECTRONICS SCI & TECH OF CHINA
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing bolt preload monitoring technologies suffer from problems such as invasive sensors damaging structural integrity, wired connections limiting deployment flexibility, and difficulty in long-term stable operation in rotating parts or confined spaces.
Method used
A passive wireless monitoring method based on RFID eddy current sensors is adopted. By mapping the resonant frequency and equivalent resistance, the bolt preload is estimated in real time. A signal acquisition system is built to wirelessly monitor the bolt preload.
Benefits of technology
It enables non-intrusive installation and wireless monitoring, maintains the mechanical properties of bolts, adapts to complex working conditions, and reduces deployment costs and maintenance difficulty.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122409042A_ABST
Abstract
本发明公开了一种基于RFID涡流传感器的螺栓预紧力无源无线监测方法，先布置RFID传感器及其传感线圈，搭建出信号采集系统；接着将螺栓预紧力变化转化为线圈电感值变化，进而引起传感器天线的谐振频率发生偏移，LDC将模拟量转化为数字量，阅读器器通过测量接收天线的谐振频率，利用阅读器，获取传感器当前谐振频率和等效电阻，代入映射表，从而估算预紧力范围。
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