LiDAR Circuit Board Alignment Using Pre-Threaded Chassis Pins
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Solution Overview
Problem
The assembly of LiDAR systems for autonomous vehicles faces challenges due to 'blind mating' of electrical connectors, leading to increased assembly time and costs, as well as potential damage during the coupling process, due to obscured connectors.
Innovation Solution
The use of partially threaded pins and pin caps that extend from the chassis to pre-align and secure the first circuit board to the second circuit board before electrical connector coupling, allowing for alignment without direct visualization of the connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If blind mating of electrical connectors is used to couple circuit boards, then assembly can proceed without direct visualization, but assembly time increases and connector damage risk increases
Solution Approach 1:
The patent applies preliminary action by pre-threading pins into the chassis before attempting to mate electrical connectors. These pins extend through openings in the chassis and engage with corresponding features on the circuit boards, establishing precise alignment and physical contact before the electrical connectors are fully mated. This preliminary mechanical coupling guides the connectors into proper alignment, eliminating the time-consuming trial-and-error associated with blind mating while maintaining the advantage of not requiring direct visualization of the connectors during assembly.
2Ease of operation
If blind mating of electrical connectors is used, then assembly can proceed without direct visualization, but connector damage risk increases
Solution Approach 1:
The patent introduces pins as intermediary elements that mediate the coupling between circuit boards and the chassis. These pins extend through openings in the chassis and make contact with corresponding features on the circuit boards before the electrical connectors are fully mated. The pins act as physical guides and intermediaries that establish proper alignment and distribute mechanical stresses, preventing direct force application to the fragile electrical connectors during the assembly process. This intermediary mechanism protects the connectors from damage while enabling blind mating operation.
3Ease of operation
If electrical connectors are obscured during assembly, then blind mating can be performed, but alignment precision decreases
Solution Approach 1:
The patent applies self-service through features on the circuit boards that engage with the pins extending from the chassis. The circuit boards include corresponding features (such as recesses or protrusions) that automatically engage with the pin features, causing the circuit boards to self-align with the chassis openings. This self-aligning mechanism ensures precise connector alignment without requiring direct visualization or manual adjustment, as the mechanical features guide the components into proper alignment automatically during the assembly process.
Data Source
AI summary
A Light Detection and Ranging (LiDAR) module for a vehicle can include a chassis, a galvanometer driver circuit board and a main circuit board. The main circuit board may be pre-assembled to the chassis resulting in a blind mating of an electrical connector of the main circuit board to an electrical connector of the galvanometer driver circuit board. The LiDAR module may include pins extending from the chassis arranged to extend through holes in the galvanometer driver circuit board in order to align the electrical connector of the galvanometer driver circuit board with the electrical connector of the main circuit board prior to the coupling of the electrical connectors. The pin may include a threaded portion coupled to the chassis, an unthreaded central portion engaging the galvanometer driver circuit board, and another threaded portion used to secure the galvanometer driver circuit board to the chassis.


