Transducer Transmission Characteristic Estimation and Compensation
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Solution Overview
Problem
Existing ultrasonic and radar-based position detection systems face inaccuracies due to manufacturing tolerances, installation variations, and environmental factors like climate, which cannot be effectively compensated for without costly high-precision converters and complex calibration processes.
Innovation Solution
The method involves inferring components of a transmission characteristic from other components, relating to the same or different pulses, and mapping influencing variables such as temperature, humidity, and object properties to improve accuracy without requiring costly components or additional manufacturing steps, by estimating and linking components of transmission characteristics to account for various influencing factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-precision converters are used to reduce converter-related scatter, then measurement precision is improved, but device cost increases
Solution Approach 1:
The patent uses reference measurements from identical or similar transducers to create a transfer function that copies and compensates for transmission characteristics. Instead of requiring each transducer to be individually high-precision, the system copies the characteristics from a reference transducer and applies correction factors, achieving accurate measurements with standard off-the-shelf components.
Solution Approach 2:
The patent changes the approach from improving hardware precision to adjusting measurement parameters through post-processing. By measuring transmission characteristics and creating transfer functions, the system transforms the problem from a hardware precision issue to a software-based parameter correction issue, allowing standard transducers to achieve high measurement precision.
2Measurement precision
If individual calibration is performed to reduce installation errors, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal calibration approach where a single reference measurement can be used to generate transfer functions for multiple transducers. The calibration process is generalized so that one reference transducer can compensate for many other transducers, reducing the need for individual complex calibration procedures for each sensor.
Solution Approach 2:
The system copies the transmission characteristics from a reference transducer to create transfer functions for other transducers. This copying approach allows the calibration information from a single reference measurement to be applied universally across multiple transducers, significantly reducing the complexity of individual calibration processes.
3Device complexity
If conventional systems are used, then device complexity is kept simple, but ability to compensate for characteristic fluctuations during service life is lost
Solution Approach 1:
The patent performs preliminary measurements of transmission characteristics and stores transfer functions for later use. By pre-measuring and storing the characteristics of reference transducers, the system is prepared to compensate for fluctuations during service life without requiring complex real-time adjustments or additional hardware.
Solution Approach 2:
The system implements a feedback mechanism where stored transfer functions from reference measurements are continuously applied to compensate for transducer characteristics during operation. This feedback approach allows the system to maintain reliability by continuously correcting for characteristic fluctuations using pre-acquired reference data.
4Device complexity
If narrow-band applications are used, then device complexity is reduced, but converter-related scatter increases
Solution Approach 1:
The patent addresses the increased scatter in narrow-band applications by changing the measurement parameters through transfer function-based compensation. Instead of relying on hardware bandwidth, the system uses software-based parameter correction to achieve precise measurements even with narrow-band transducers, maintaining measurement precision without increasing device complexity.
Data Source
AI summary
The invention relates to a method for estimating the transmission characteristics of a transceiver configured to detect environmental characteristics. The transceiver is configured as an ultrasonic transducer or a microwave transmitter/receiver. A transmit pulse is sent into the environment by means of the transceiver and received as a receive pulse by the transceiver. At least one component of a first transmission characteristic is detected. This component is then assigned to at least one further component of the first or to a further transmission characteristic, which results from comparing the transmit pulse and the receive pulse, or from comparing a further transmit pulse and its corresponding receive pulse.Finally, the transmission characteristics of the transceiver are determined by ascertaining them based on the first transmission characteristic and at least one further component of the first or further transmission characteristic. The invention further comprises a method for determining the relative position and a method for calibrating a transceiver, both of which utilize the estimation method according to the invention. Finally, the invention includes a database in which the assignment is stored and a device for estimating the transmission characteristic of a transceiver.