一种开合式柔性小电流霍尔传感器
By designing an openable flexible low-current Hall sensor, using a flexible package and an arc-shaped PCB board, combined with an array of micro magnetic cores and a multi-layer PCB structure, the installation problem of traditional Hall sensors in complex environments is solved, improving the accuracy and reliability of low-current measurement, and achieving rapid installation and efficient electromagnetic interference suppression.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN SPARK ELECTRONICS TECH
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional Hall current sensors are difficult to install in complex environments, cannot be adapted to irregularly shaped cables, have low accuracy in measuring small currents, lack reliable connection between flexible packaging and signal processing modules, have weak anti-electromagnetic interference capabilities, and poor heat dissipation performance.
A flexible, low-current Hall sensor with an openable design is designed. It employs a flexible package, an arc-shaped flexible PCB board, Hall elements, and an array of miniature magnetic cores. Combined with a multi-layer PCB structure and thermally conductive adhesive, it enhances magnetic field signal acquisition and suppresses electromagnetic interference, enabling rapid installation and high-precision measurement.
It enables rapid installation and high-precision low-current measurement in complex environments, improving installation efficiency and measurement accuracy, enhancing sensor reliability and anti-interference capabilities, and extending mechanical life.
Smart Images
Figure CN224518828U_ABST
Abstract
Claims
1. An open-close flexible low current Hall sensor characterized in that, It includes a flexible package (1), a flexible PCB board (4), a Hall element (2), an array of micro magnetic cores (3), and a base (5); The flexible PCB board (4) has an arc-shaped structure and is placed inside the flexible package (1). One end of the flexible package (1) is fixedly connected to the base (5), and the other end is detachably connected to the base. The other end is provided with a first electrical interface (6a) connected to a second electrical interface (6b) on the base. The Hall sensor includes at least 7 Hall elements (2), which are evenly arranged on the inner surface of the flexible PCB board (4) along the circumferential direction. The sensing surface of the Hall element (2) faces the center of the arc and is parallel to the inner surface of the flexible PCB board. The array-type micro magnetic cores (3) are evenly distributed in the gaps between adjacent Hall elements (2) and are fixed to the inner surface of the flexible PCB.
2. An open-close flexible low current Hall sensor according to claim 1, characterized in that, The arc angle corresponding to the arc structure formed by the flexible PCB board (4) is between 180° and 270°.
3. An open-close flexible low current Hall sensor according to claim 1, wherein, The flexible PCB board (4) has a multi-layer structure, including at least a signal layer (4c), a ground layer (4a) and a power layer (4b). At least one signal layer (4c) is located on the inner surface of the flexible PCB board (4) and is electrically connected to the Hall element (2). At least one ground layer (4a) is located on the outer surface of the flexible PCB board (4).
4. The open-close flexible low current Hall sensor according to claim 1, wherein, The flexible package (1) has a shielding layer (7) on its inner side, and the shielding layer (7) is electrically connected to the grounding layer (4a) of the flexible PCB board (4).
5. The openable flexible low-current Hall sensor according to claim 1, characterized in that, The micro magnetic core (3) is fixed to the flexible PCB by thermally conductive adhesive, which fills the gap between the micro magnetic core (3) and the flexible PCB and extends to the package shell.
6. An open-close flexible low current Hall sensor according to claim 1, wherein, The base (5) is also equipped with a signal acquisition and processing module, which is electrically connected to the signal layer (4c), ground layer (4a) and power layer (4b) on one end of the flexible PCB board (4); the other end of the signal acquisition and processing module is provided on the second electrical interface (6b) on the base and is electrically connected to the base.
7. The open-close flexible low current Hall sensor according to claim 1, wherein, The micro magnetic core (3) has a flat structure, a length of 3-8 mm, and a width not exceeding the width of the flexible PCB board (4).
8. The open-close flexible low current Hall sensor according to claim 1, wherein, The height of the micro magnetic core (3) is flush with the sensing surface of the Hall element (2), and a gap of ≥0.5mm is maintained between the magnetic core and the Hall element (2).
9. The open-close flexible low current Hall sensor according to claim 1, wherein, The axial centerline of the array-type micro magnetic core (3) forms an angle of 15°-20° with the normal of the sensing surface of the Hall element (2).
10. The open-close flexible low current Hall sensor according to claim 1, wherein, A buffer pad (8) with a thickness of 0.05-0.2mm is provided between the Hall element (2) and the flexible PCB board (4). The buffer pad (8) is fixedly connected to the flexible PCB board (4) and the Hall element (2) by thermally conductive adhesive.