Radar Antenna Arrangement for Velocity-Independent Angular Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radar systems face difficulties in accurately determining the angular position of moving objects in production or conveyor environments due to relative velocity causing phase shifts in received signals, making it challenging to monitor and register these environments effectively.
Innovation Solution
A method using a switched transmission antenna array with two receiving antennas, where the ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques) method is applied to determine the angular position of objects independently of their velocity, by utilizing two equivalent receiving antenna arrays shifted relative to each other, which are influenced equally by the phase contributions from object movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar is used to determine the angular position of moving objects, then the position information can be obtained, but the relative velocity causes additional phase shifts that make determining the angular position difficult
Solution Approach 1:
The patent introduces a reference signal as an intermediary that carries the same velocity-induced phase shifts as the target signal. By comparing the target signal with this reference signal, the common phase shifts cancel out, allowing accurate angular position determination independent of object velocity. The reference signal acts as a mediator that enables the separation of velocity effects from angular position information.
2Productivity
If a switched transmission antenna array is used to monitor production environments, then the monitoring capability is provided, but accurately registering moving objects becomes difficult due to velocity-induced phase shifts
Solution Approach 1:
The reference signal generated from the switched transmission antenna array serves as an intermediary that captures the velocity-induced phase shifts. This reference signal is then used in the signal processing to compensate for the phase shifts affecting the target signals, enabling accurate angular position determination of moving objects while maintaining the monitoring capability of the production environment.
3Reliability
If conventional radar methods are applied to moving objects, then signal reception is possible, but the phase contributions from velocity affect the measurement accuracy
Solution Approach 1:
The patent uses a reference signal as an intermediary that experiences the same velocity-induced phase shifts as the target signal. By correlating the target signal with this reference signal, the common phase contributions from velocity are eliminated, allowing reliable signal reception while achieving accurate angular position determination independent of object motion.
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 precise and independent determination of the angular position of both static and moving objects, allowing for effective monitoring and registration of production or conveyor environments, regardless of object velocity, and is cost-effective.
Implementation Method 1
radar can be applied for registering a production or conveyor environment. Radar offers the opportunity to determine the distance and position of objects
Implementation Method 2
receive the radar signals radiated by the transmission antenna array and reflected by at least one radar target
Implementation Method 3
the relative velocity between the object and the radar apparatus causes additional phase shifts in the received signals, which make determining the angular position difficult
Implementation Method 4
determining the angular position of at least one radar target from the first set and the second set of received signals by using an ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques) method
Data Source
AI summary
A method using an antenna arrangement. The antenna arrangement includes a switched transmission antenna array with a number of transmission antennas, which radiate a radar transmission signal one after the other corresponding to a predetermined switching sequence. A first receiving antenna and a second receiving antenna receive the transmitted radar signals and reflected by at least one radar target. A first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; receiving a second set of received signals by the second receiving antenna simultaneously with receiving the first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; and from these signals the angular position of the at least one radar target based on the first set and the second set of received signals using an ESPRIT method is determined.