Lidar Controller Peak Current Management
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Solution Overview
Problem
Conventional object detection devices, such as scanning laser radars, require large current-consuming components like temperature adjusters for the light emitter and receiver, leading to increased power supply size and voltage variation due to peak current demands, which complicates the power supply design and device size.
Innovation Solution
A controller is used to manage the operations of these components, ensuring that the common power supply outputs a current less than the predetermined upper-limit current by controlling the overlap of peak currents from the light emitter, window, and scanner motor drive circuits, thereby reducing the overall current requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature adjusters and other high-current components are used to ensure stable laser emission and reception, then detection reliability is improved, but the power supply size increases
Solution Approach 1:
The controller periodically activates temperature adjusters and other high-current components only during their necessary operational windows rather than continuously, thereby reducing peak current demands and allowing for a more compact power supply design while maintaining detection reliability
Solution Approach 2:
The system dynamically adjusts the operation timing of multiple high-current components based on real-time detection needs and power supply capacity, optimizing the balance between reliability and power supply size through adaptive current management
2Measurement precision
If multiple temperature adjusters operate simultaneously to maintain stable components, then detection precision is improved, but current output variation increases
Solution Approach 1:
The controller pre-cools or pre-heats temperature-sensitive components before they are needed for detection, so that when detection occurs, the components are already at optimal temperature, reducing the need for simultaneous operation of multiple temperature adjusters during critical measurement periods
Solution Approach 2:
The controller divides the operation of temperature adjusters into separate time segments, activating each adjuster for specific components at different times rather than simultaneously, thereby maintaining detection precision while reducing current output variation
3Reliability
If peak current demands from multiple components are met simultaneously, then component performance is maintained, but power supply design complexity increases
Solution Approach 1:
The controller implements periodic operation schedules for high-current components, ensuring that peak current demands are distributed across different time periods rather than occurring simultaneously, which simplifies power supply design while maintaining component performance through adequate cooling periods and energy recovery
Data Source
AI summary
An object detection device includes: a light emitter that emits laser light as irradiation light; a light receiver that receives light including reflected light of the irradiation light; a plurality of constituents that perform operations to detect information on an object through operations of the light emitter and the light receiver and that have an increased current period in which a consumed current is a current larger than an average current; a common power supply that supplies power to the plurality of constituents; and a controller that controls the operations of the plurality of constituents so as to make a current output from the common power supply less than a predetermined upper-limit current.