LOS Range Detection via Signal Intensity Correlation
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Solution Overview
Problem
Traditional range detection systems are costly and bulky, making them impractical for low-cost scenarios, as they require large arrays and expensive computing systems for complex calculations.
Innovation Solution
A line-of-sight (LOS) signal-based method using a LOS emitter and receiver, where the LOS receiver generates a value representing the intensity of the received signal and processes it using a predefined relationship to determine the separation distance, derived from the known output intensity of the LOS emitter, allowing for inexpensive and lightweight range detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional range detection systems (radar) are used, then accurate distance measurement is achieved, but the system becomes costly and bulky
Solution Approach 1:
The patent replaces complex mechanical/radar systems with optical components (LEDs and photodiodes). Instead of using radar waves and large arrays, the invention uses light emission and detection to measure distance through intensity correlation, dramatically simplifying the system while maintaining measurement capability
Solution Approach 2:
The patent employs inexpensive optical components (LEDs and photodiodes) instead of expensive radar equipment. These simple, low-cost components can be mass-produced and replaced easily, making the range detection system affordable and practical for consumer applications
2Measurement precision
If radar systems with large arrays are used, then range detection capability is achieved, but the system weight increases
Solution Approach 1:
The patent substitutes heavy radar hardware with lightweight optical components. LEDs and photodiodes weigh fractions of what radar arrays weigh, enabling portable and mobile range detection applications that were previously impossible with traditional systems
3Measurement precision
If expensive computing systems are used, then complex calculations for triangulation are achieved, but the cost increases
Solution Approach 1:
The patent replaces complex computing systems with simple intensity correlation calculations. Instead of performing complex triangulation mathematics, the system uses the relationship between emitted and received light intensities to directly determine distance, requiring minimal computational resources
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 accurate range detection over short distances using inexpensive components like LEDs and photodiodes, reducing the cost and complexity of motion tracking systems by correlating signal intensity with distance, facilitating 3D location determination and motion tracking.
Implementation Method 1
receiving, at a line-of-sight (LOS) receiver, a LOS signal outputted by a separate LOS emitter
Implementation Method 2
generating a value representing an intensity of the received LOS signal
Data Source
AI summary
Embodiments herein disclose a range detection system that includes a line-of-sight (LOS) emitter that outputs a LOS signal (e.g., visible light, infrared, etc.) which is detected at a receiver (e.g., a photodiode). The receiver outputs a signal representing the intensity of the LOS signal at the receiver. The output signal is converted into a digital signal which is then used to identify a distance value corresponding to the intensity of the LOS signal. For example, the range detection system may include a data structure that maps a plurality of digital signals to respective distance values. In this manner, the intensity of the LOS signal measured at the receiver can be correlated to a distance between the emitter and the receiver.