Accounting for drift of a position sensor
By using the robotic instrument to determine and correct for thermal drift in position sensors, the system ensures accurate registration and operation of surgical instruments, addressing the issue of thermal drift in surgical robots.
WO2026009224A1PCT designated stage Publication Date: 2026-01-08MAZOR ROBOTICS
Patent Information
- Application Number
- PCT/IL2025/050566
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-02
- Filing Date
- 2025-07-02
- Publication Date
- 2026-01-08
Smart Images
Figure IL2025050566_08012026_PF_FP_ABST
Abstract
A system for accounting for drift of a position sensor. The system includes a position sensor, a robotic instrument including a first tracker, and an electronic processor. The electronic processor is configured to determine a matrix defining a position of the position sensor in a coordinate system, control movement of the robotic instrument to a predefined position, and capture, with the position sensor, a first position of the first tracker. The electronic processor is configured to, in response to determining that a predetermined amount of time has passed since the first position was captured, control movement of the robotic instrument to the predefined position, capture a second position of the first tracker with the position sensor, determine, based on a difference between the first position of the first tracker and the second position of the first tracker, a drift matrix, and update the matrix based on the drift matrix.
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Citation Information
Patent Citations
An interventional surgical robot system and its calibration and error compensation method
CN114027980B
Systems and methods for intraoperative re-registration
US20220249180A1