Rangefinders and self-propelled equipment

The distance measuring device with multiple light sources and photosensitive surfaces enables accurate multi-directional distance measurement, addressing inaccuracies in wall-following and obstacle avoidance for mobile robots, ensuring effective cleaning operations.

JP2026523263APending Publication Date: 2026-07-13BEIJING ROCKROBO TECH CO LTD
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Patent Information

Application Number
JP2026500143
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-07-26
Filing Date
2024-07-19
Publication Date
2026-07-13

AI Technical Summary

Technical Problem

Existing mobile robots, such as household smart cleaning robots, face challenges in accurately determining distances to target objects with complex outlines, leading to inaccuracies in wall-following and obstacle avoidance due to the limitations of single-emission angle infrared sensors.

Method used

A distance measuring device with a light-emitting assembly comprising multiple light sources emitting detection light at different angles, combined with a detection assembly featuring multiple photosensitive surfaces and a controller for time-division control, allows for multi-directional distance measurement by triangulation, enhancing accuracy and stability.

Benefits of technology

The solution provides stable and accurate distance measurements for complex objects, improving the self-propelled device's ability to follow walls and avoid obstacles, with a simple structure suitable for mass production and widespread application.

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Abstract

This application provides a distance measuring device and a self-propelled device. The distance measuring device includes a light-emitting assembly, a light-receiving mirror, a detection assembly and a controller, wherein the light-receiving mirror and the light-emitting assembly are spaced apart, the detection assembly is located near the focal plane of the light-receiving mirror, the light-emitting assembly includes at least two light-emitting sources whose emission directions are not parallel to each other, the light-emitting sources are configured to emit detection light having a divergence angle toward a target object, the detection assembly includes at least two photosensitive surfaces, the photosensitive surfaces are configured to receive reflected light information reflected by the target object and passed through the light-receiving mirror, and the controller is electrically connected to the light-emitting sources and the detection assembly, the controller is configured to time-division control the operation of each light-emitting source and to determine the measurement distance of the target object based on the reflected light information of the same light-emitting source received by each photosensitive surface.
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