Digital THz Imaging for Weather-Resistant Spatial Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional object detection systems, such as LiDAR and radar, face challenges in scaling cost-effectively with high accuracy and maintaining performance under varying environmental conditions, particularly in adverse weather.
Innovation Solution
A CMOS-based system that digitally encodes carrier signals between 100 GHz and 3 THz, using a digital encoder and decoder to derive spatial information in the digital domain, reducing reliance on analog circuitry and enhancing interference rejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar operates at longer wavelengths to overcome environmental limitations, then reliability in adverse weather is improved, but device complexity and cost increase due to demanding analog and frontend circuitries
Solution Approach 1:
The patent replaces complex analog radar circuitry with a digital imaging system using CMOS sensors and signal processing. The system captures electromagnetic radiation in the 100 GHz to 3 THz range using digital sensors and derives spatial information through digital signal processing algorithms, eliminating the need for complex analog frontend circuitries while maintaining detection reliability in adverse weather conditions
Solution Approach 2:
The patent changes the operating parameters by using digital sampling and processing in the time domain instead of traditional frequency domain analysis. The system uses direct digital synthesis and digital down-conversion to process reflected signals, transforming the radar approach from analog frequency-based to digital time-based processing, thereby reducing circuit complexity
2Measurement precision
If LiDAR uses short wavelengths for high spatial information extraction, then measurement precision is improved, but reliability deteriorates due to sensitivity to environmental variations
Solution Approach 1:
The patent changes the wavelength parameter to the terahertz range (100 GHz to 3 THz), which provides a balance between the advantages of short wavelengths (better spatial resolution) and long wavelengths (better environmental robustness). This intermediate wavelength range allows the system to maintain measurement precision while improving reliability in adverse weather conditions compared to traditional LiDAR
3Measurement precision
If radar extracts spatial information by analyzing frequency and phase content, then measurement precision is improved, but device complexity increases due to demanding analog circuitries
Solution Approach 1:
The patent substitutes analog frequency and phase analysis with digital signal processing methods. The system uses digital down-conversion, digital filtering, and correlation algorithms to extract spatial information from reflected signals, achieving the same measurement precision without requiring complex analog circuitries for frequency and phase analysis
4Measurement precision
If conventional detection systems use complex cameras or LiDAR, then measurement precision is improved, but ease of manufacture deteriorates due to high cost and specialized processes
Solution Approach 1:
The patent employs CMOS-based digital sensors and standard semiconductor manufacturing processes to create the terahertz imaging system, replacing expensive specialized LiDAR components and complex camera systems. The use of commodity CMOS technology and standard fabrication processes significantly reduces manufacturing cost while maintaining measurement precision through digital signal processing
Solution Approach 2:
The patent creates a multi-functional system that can perform object detection, classification, and spatial mapping using a single integrated CMOS-based terahertz imaging platform. This universal system replaces multiple specialized devices (complex cameras, LiDAR, radar) with one system that can adapt to different detection needs through software algorithms, improving ease of manufacture and deployment
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 system provides high-resolution surround mapping with resistance to weather changes, achieving low-cost scalability and improved accuracy by leveraging CMOS technology and digital encoding.
Implementation Method 1
a transmitter configured to transmit the encoded signal out as an electromagnetic radiation in a range from 100 GHz to 3 THz
Implementation Method 2
the reflected signal is detected by a receiver
Data Source
AI summary
A system includes a transmitter, a receiver, and a processor. The transmitter includes a digital encoder configured to receive a carrier signal between 100 GHz and 3 THz, wherein the digital encoder is further configured to receive a digital code and to modulate the digital code with the carrier signal to form an encoded digital signal. The transmitter includes a transmitting antenna configured to receive the encoded digital signal and transmit the encoded digital signal out. The receiver includes a receiving antenna configured to receive an echoed signal in response to the encoded digital signal interacting with an object. The receiver includes a digital decoder configured to decode the echoed signal based on the digital code to form a decoded echoed signal. The processor is configured to receive the decoded echoed signal and further configured to process the decoded echoed signal to determine spatial information with respect to the object.