iToF相机的温度影响测距的补偿方法以及系统、电子设备
By acquiring temperature in real time in the iToF camera and using a delay phase-locked loop to detect modulation and demodulation deviation, the problems of high temperature compensation cost and insufficient ranging accuracy of iToF cameras are solved, achieving low-cost, real-time temperature compensation.
CN115825978BActive Publication Date: 2026-07-17SIGMASTAR TECH LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SIGMASTAR TECH LTD
- Filing Date
- 2022-10-21
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing iToF camera temperature compensation methods are costly and lack ranging accuracy under wide temperature variations, especially with severe motion blur in moving scenes.
Method used
By acquiring the real-time temperature inside the image sensor of the iToF camera, calculating the average temperature, and when the temperature change exceeds a threshold, using a delay phase-locked loop to re-detect the modulation and demodulation deviation value, updating the deviation value on the modulation path to compensate for the temperature effect.
Benefits of technology
It achieves real-time, low-cost temperature compensation, adapts to temperature changes in each module, reduces system dynamic power consumption, and maintains ranging accuracy.
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Smart Images
Figure CN115825978B_ABST
Abstract
本发明提供一种iToF相机的温度影响测距的补偿方法以及系统、电子设备。所述方法包括如下步骤：获取iToF相机的图像传感器内部的实时温度；获取多个所述实时温度的平均温度；当所述平均温度与基础温度之间的差值的绝对值大于或等于一预设阈值时，更新所述基础温度；通过延迟锁相环重新检测iToF相机的调制与解调的偏差值，以更新iToF相机的调制路径上的偏差值，补偿温度变化对测距的影响。上述技术方案，基于iToF内部延迟锁相环的变化值，实时补偿温度变化对测距的影响，既节省了iToF相机的标定成本、实现实时补偿温度变化对测距的影响，又可以很好的适配每一个模组。
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