360° Rotary Lidar Scanning via Stationary Electronics
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Solution Overview
Problem
Existing lidar systems face challenges with short service life and reduced stability and reliability due to high-speed rotation of electronic components, and they often have scanning blind areas and complex circuit structures with wireless charging requirements.
Innovation Solution
A lidar system design featuring a 360° rotary scanning capability with a laser emitting unit and receiving unit located at the same end of a rotary base, using vertically and obliquely arranged reflecting plane mirrors and a driving mechanism with a motor, pinion, and ball bearing, eliminating the need for rotating electronic components and wireless power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic components are installed on the rotating frame and rotate at high speed, then 360° scanning capability is achieved, but the service life is shortened and stability and reliability are reduced
Solution Approach 1:
The patent extracts the electronic components (laser emitting unit and laser receiving unit) from the rotating frame and places them on the stationary base. Only the reflecting plane mirrors rotate on the rotating frame, while the electronic components remain stationary, eliminating the reliability issues caused by high-speed rotation of electronics.
Solution Approach 2:
Instead of the conventional design where electronic components rotate with the frame, this patent inverts the arrangement: the electronic components stay stationary on the base while the optical elements (reflecting plane mirrors) rotate. This reversal solves the reliability problem while maintaining scanning functionality.
2Strength
If an upright boom extends out of the rotating frame to support the rotating frame, then the rotating frame is supported, but a scanning blind area is created during high-speed 360° rotating scanning
Solution Approach 1:
The patent removes the upright boom structure from the rotating frame. The rotating frame is supported directly on the base through bearings, eliminating the boom that would create scanning blind areas. This allows unobstructed 360° scanning coverage.
Solution Approach 2:
Instead of extending support structures outward from the rotating frame (which creates blind spots), the patent inverts the support approach by using a central bearing mechanism on the base to support the rotating frame from below, eliminating obstructive booms and enabling complete 360° coverage.
3Use of energy by moving object
If power is supplied to rotating electronic components through an electric slip ring or wireless charging, then power supply is achieved, but the stability, reliability and service life are reduced
Solution Approach 1:
The patent extracts the power supply problem by keeping electronic components stationary on the base. Since electronics don't rotate, standard wired power connections can be used without slip rings or wireless charging, eliminating the reliability issues associated with rotating power transmission.
Solution Approach 2:
Instead of supplying power to rotating components through complex mechanisms like slip rings or wireless charging, the patent inverts the approach by keeping electronics stationary, allowing simple, reliable wired power connections without rotation-related reliability problems.
4Use of energy by moving object
If wireless charging is used for rotating components, then power supply is achieved, but the circuit structure becomes complex and cost increases
Solution Approach 1:
The patent extracts the wireless charging requirement by keeping electronic components stationary. This eliminates the need for complex wireless power transmission circuits and additional processing chips, simplifying the overall circuit structure and reducing costs.
Solution Approach 2:
Instead of implementing complex wireless charging systems for rotating components, the patent inverts the design to keep electronics stationary, allowing the use of simple, cost-effective wired power connections without additional processing chips or complex circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the stability, reliability, and service life of the lidar system by preventing rotation of electronic components, eliminating scanning blind areas, and simplifying the circuit structure, thereby improving product performance and reducing costs.
Implementation Method 1
an emitting light L1 emitted by the laser emitting unit is reflected by a second mirror and a first mirror, then projected on the upper reflecting plane mirror along the central axis S, and then laterally reflected out, and a light reflected back from an external object is horizontally projected on the lower reflecting plane mirror to form the received light L2 which enters the laser receiving unit along the central axis S
Data Source
AI summary
The present invention discloses a lidar system capable of realizing 360° rotary scanning, which comprises a laser emitting unit, a laser receiving unit, a 360° scanning rotary base, an upper reflecting plane mirror and a lower reflecting plane mirror, wherein the upper reflecting plane mirror and the lower reflecting plane mirror are arranged vertically, and obliquely installed at an angle of 45° on the same side of the rotary base, and rotate around a vertical central axis S of the rotary base; electronic components such as the laser emitting unit and the laser receiving unit do not rotate with the rotary base, thus ensuring the stability, reliability and long service life of the electronic components. There is no blind area of scanning when the rotary base rotates 360°, and in the meantime wireless power supply and signal transmission are not required.