Ranging Module Using Multi-Lobe Signal Reception
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Solution Overview
Problem
Existing ranging modules with phased array structures face challenges in reducing the physical size and cost while maintaining signal strength, as they require multiple light receiving elements to detect both main and grating lobes, leading to increased complexity and size.
Innovation Solution
A ranging module configuration with a signal receiver unit comprising multiple antenna units to simultaneously receive reflected electromagnetic waves from the main and grating lobes, allowing the signal processor to determine the source of the signals and calculate distances, thereby maintaining high signal strength without increasing the number of light receiving elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light receiving elements are used to detect both main and grating lobes, then signal detection capability is improved, but device physical size and complexity increase
Solution Approach 1:
The patent makes a single light receiving element perform multiple functions by sequentially detecting both main lobes and grating lobes. The element is configured to receive electromagnetic waves from different directions at different time periods, thereby detecting multiple types of reflected waves without requiring separate receiving elements for each function.
Solution Approach 2:
The patent employs periodic action by alternately changing the light receiving direction of the single light receiving element between different time periods. During a first time period, the element receives main lobes; during a second time period, it receives grating lobes. This temporal separation allows one element to fulfill multiple detection roles.
2Reliability
If multiple light receiving elements are used to detect both main and grating lobes, then signal detection capability is improved, but device physical size increases
Solution Approach 1:
The patent makes a single light receiving element perform multiple functions by sequentially detecting both main lobes and grating lobes. The element is configured to receive electromagnetic waves from different directions at different time periods, thereby detecting multiple types of reflected waves without requiring separate receiving elements for each function.
Solution Approach 2:
The patent employs periodic action by alternately changing the light receiving direction of the single light receiving element between different time periods. During a first time period, the element receives main lobes; during a second time period, it receives grating lobes. This temporal separation allows one element to fulfill multiple detection roles.
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
This configuration allows for increased scanning angles without reducing ranging points or extending the ranging period, while reducing noise influence and suppressing the increase in physical size and cost by averaging and coding received signals across multiple antenna units.
Implementation Method 1
an electromagnetic wave such as an invisible light and millimeter wave or the like are used. The electromagnetic wave is projected to scan space to detect an object.
Implementation Method 2
a signal receiver which receives reflected electromagnetic waves from an object and outputs a received signal
Data Source
AI summary
A signal receiver unit includes a first receiver unit which is designed to receive reflected electromagnetic waves created by a main lobe and two grating lobes of projected electromagnetic wave. The signal receiver unit includes a second receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and one grating lobe of the projected electromagnetic wave. The signal receiver unit includes a third receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and the other grating lobe of the projected electromagnetic wave. The signal processor unit identifies the reflected electromagnetic waves based on combinations of the received signals of the first receiver unit, the second receiver unit, and the third receiver unit, and calculates a distance to an object.