Laser Radar Synchronous Scanning for Precision and Safety
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Solution Overview
Problem
Existing line laser radars require high instantaneous laser power, leading to safety concerns and limited range, while single point laser radars have poor angular accuracy and are restricted to one-line measurements, failing to meet civil laser ranging demands for precision and safety.
Innovation Solution
A laser radar system with a point light source rotating mechanism synchronized with an image sensor mechanism, using low-power point lasers to achieve line scanning by rotating the lasers in a manner that aligns with the exposure line of a rolling shutter door, allowing for precise and safe line laser-like functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high instantaneous laser power is used for line laser scanning, then scanning range and precision are improved, but safety hazards increase and laser power consumption increases
Solution Approach 1:
The patent segments the laser scanning function by using multiple low-power point lasers arranged in an array instead of a single high-power line laser. Each point laser operates at safe power levels while the collective arrangement of multiple lasers creates the effective line scanning capability, thus resolving the contradiction between scanning precision and safety hazards
Solution Approach 2:
The patent merges multiple low-power point lasers into a unified scanning system that functions equivalently to a high-power line laser. By combining the output of multiple point lasers arranged in specific patterns, the system achieves line scanning capability without requiring any single laser to operate at hazardous power levels
2Object-affected harmful factors
If single point laser is used for scanning, then laser power consumption is reduced and safety is improved, but angular accuracy deteriorates and measurement range is limited
Solution Approach 1:
The patent transitions from single-point scanning to multi-point array scanning, adding spatial dimensionality to the measurement system. By arranging point lasers in a two-dimensional array pattern, the system achieves enhanced angular accuracy and expanded measurement range while maintaining the safety benefits of low-power operation inherent in point laser technology
3Productivity
If line laser is used for scanning, then scanning speed and coverage are improved, but laser power consumption increases and safety risks increase
Solution Approach 1:
The patent segments the high-power line laser function into multiple low-power point lasers operating simultaneously. This segmentation allows the system to achieve line scanning coverage and speed without requiring any single laser to consume excessive power, as each point laser operates at safe, low power levels while collectively providing the scanning functionality
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
Enables high-precision, low-power line laser scanning, enhancing safety and expanding the range of applications for civil laser ranging products by using low-power point lasers to mimic line laser performance without the safety risks associated with high instantaneous power.
Implementation Method 1
a semiconductor laser emits one or more lasers at a certain angle to irradiate the measured object, the reflected light is focused by a lens and imaged on a CCD
Implementation Method 2
The basic principle of triangulation ranging of point lasers is that a semiconductor laser emits one or more lasers at a certain angle to irradiate the measured object, the reflected light is focused by a lens and imaged on a CCD, and the actual distance of the object is calculated according to the imaging position of the spot and the geometric relationship between the laser and the CCD
Implementation Method 3
a line laser is irradiated on the measured object at a certain incident angle, the reflected light is focused by a lens and imaged on a CCD, and the actual distance of the object is calculated according to the imaging position of the linear laser beam
Data Source
AI summary
The present invention discloses a laser radar for synchronous scanning of line exposure and point lasers of a rolling shutter door and a detection method. The laser radar comprises: a point light source rotating mechanism and an image sensor mechanism; the rotation speed of the point light source rotating mechanism is consistent with the scanning speed of the image sensor mechanism, and the phase is synchronized; and a region illuminated by lasers is in the region corresponding to the exposure line of the rolling shutter door of the image sensor mechanism. The present invention proposes the use of point laser rotating scanning in combination with line scanning of the rolling shutter door to synchronously realize the functions of line lasers.