Compact Laser Radar Module With Stacked Cooling and EMI Shielding
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Solution Overview
Problem
There is a need for a smaller-sized laser radar module that can meet the requirements of intelligent driving and intelligent robots, particularly in terms of cost, size, and power consumption, with an urgent need for a compact structural form.
Innovation Solution
A laser radar module design that includes a housing body with a stacked laser transceiver assembly and thermoelectric cooler temperature control assembly, sealed by an upper cover and circuit boards for electrical control, along with electromagnetic shielding and a compact chamber structure to reduce size and enhance compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the laser radar module uses a compact stacked structure for the laser transceiver assembly and thermoelectric cooler temperature control assembly, then the size of the module is reduced, but the heat dissipation efficiency may deteriorate
Solution Approach 1:
The patent implements a nested structure where the laser transceiver assembly is positioned directly on top of the thermoelectric cooler temperature control assembly, with the thermoelectric cooler serving as both a temperature control device and a heat dissipation component. This nesting allows the heat generated by the laser transceiver to be directly conducted to the thermoelectric cooler for efficient dissipation, resolving the contradiction between compact size and heat dissipation efficiency.
Solution Approach 2:
The patent merges the temperature control function and heat dissipation function into a single integrated thermoelectric cooler assembly. The thermoelectric cooler is configured to both control the temperature of the laser transceiver assembly and dissipate the heat generated, eliminating the need for separate heat dissipation components and achieving compact size while maintaining heat dissipation efficiency.
2Device complexity
If the laser transceiver assembly and circuit board are disposed side by side in a compact arrangement, then the device complexity is reduced, but the electromagnetic interference between components may increase
Solution Approach 1:
The patent introduces an electromagnetic shielding layer positioned between the laser transceiver assembly and the circuit board. This shielding layer acts as an intermediary that blocks electromagnetic interference between the two components while allowing the compact side-by-side arrangement to be maintained, thus resolving the contradiction between reduced device complexity and increased electromagnetic interference.
3Object-affected harmful factors
If the upper cover of the sealed chamber is fixedly connected to the housing body to seal the laser transceiver assembly, then the dustproof and waterproof protection is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs a sealing structure where the upper cover of the sealed chamber is fixedly connected to the housing body through a sealing ring or gasket. This flexible sealing approach allows for tolerance compensation in manufacturing while achieving effective dustproof and waterproof protection, resolving the contradiction between improved protection and increased manufacturing precision requirements.
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
The design achieves miniaturization of the laser radar module to a centimeter level, improving compatibility and reducing electromagnetic interference, while ensuring dustproof and waterproof protection, thus addressing the size and structural form requirements.
Implementation Method 1
a thermoelectric cooler temperature control assembly accommodated in the housing body, the laser transceiver assembly and the thermoelectric cooler temperature control assembly being stacked and in contact with each other
Implementation Method 2
compares a reflected signal with the emitted signal and analyzes the return time (TOF) or frequency difference (Doppler frequency shift) of the signal to obtain the target distance, speed
Implementation Method 3
compares a reflected signal with the emitted signal and analyzes the return time (TOF) or frequency difference (Doppler frequency shift) of the signal to obtain the target distance, speed
Data Source
AI summary
The present disclosure provides a laser radar module, including a housing body; a laser transceiver assembly and a thermoelectric cooler temperature control assembly accommodated in the housing body, the laser transceiver assembly and the thermoelectric cooler temperature control assembly being stacked and in contact with each other; an upper cover of a sealed chamber accommodated in the housing body and fixedly connected on an inner wall of the housing body, the upper cover of the sealed chamber and the housing body together enclosing and sealing the laser transceiver assembly; and a first circuit board and a second circuit board that are stacked and electrically connected to each other for electrically controlling the laser transceiver assembly and the thermoelectric cooler temperature control assembly respectively. An object of the present disclosure is to provide a laser radar module to at least reduce the size of the laser radar module.