Optoelectronic Detection Device Feedback Timing Compensation
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Solution Overview
Problem
Existing optoelectronic detection devices in motor vehicles face challenges in compensating for errors caused by temperature changes and aging, leading to reduced functional security due to the lack of feedback on pulse transmission and delayed signal processing in TOF receivers.
Innovation Solution
The optoelectronic detection device incorporates an optical receiver that provides a trigger signal and a feedback signal to the evaluation device, allowing for the determination of the time difference between the two, which enables recognition of malfunctions and compensation for delays, using a time-to-digital converter and a field-programmable gate array for precise error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a TOF receiver controls the pulser circuit and laser diode without feedback, then the device structure is simpler, but error compensation for temperature and aging becomes impossible
Solution Approach 1:
The patent implements a feedback mechanism where the optical receiver sends a trigger signal to the optical transmitter, which then generates a feedback signal sent back to the evaluation device. This feedback loop enables real-time monitoring of pulse transmission timing, allowing the system to detect and compensate for errors caused by temperature changes and aging effects, thereby resolving the contradiction between structural simplicity and error compensation capability.
2Measurement precision
If extensive compensation tables are used for temperature delays, then measurement precision is improved, but device complexity and data storage requirements increase
Solution Approach 1:
The system performs self-diagnosis and self-compensation by using the feedback signal from the optical transmitter to automatically detect timing errors. The evaluation device processes the time difference between the trigger signal and feedback signal to dynamically compensate for temperature and aging effects, eliminating the need for extensive pre-stored compensation tables and reducing system complexity while maintaining high measurement precision.
3Ease of operation
If no feedback signal is provided for pulse transmission timing, then the device is simpler to operate, but functional security and malfunction recognition are reduced
Solution Approach 1:
The feedback signal provides automatic timing information without requiring manual intervention or complex operation. The evaluation device automatically processes the time difference between trigger and feedback signals to monitor system health and detect malfunctions, thereby enhancing functional security while maintaining ease of operation through automated monitoring.
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 solution enhances the accuracy of distance measurements and improves functional security by enabling real-time monitoring and compensation of errors related to temperature and aging, ensuring reliable operation of the detection device.
Implementation Method 1
an electromagnetic pulse generator for emitting electromagnetic emitted pulses into the surroundings
Implementation Method 2
at least one optical receiver for receiving reflected emitted pulses and for the provision of an electrical reception signal depending on the reflected emitted pulses
Data Source
AI summary
In an optoelectronic detection device (1) with at least one optical transmitting unit (3) with an electromagnetic pulse generator (4) for emitting electromagnetic emitted pulses (5), and at least one optical receiver for receiving reflected emitted pulses (7) that provides a reception signal, formed depending on the reflected emitted pulse, to an evaluation device (10), wherein the optical receiver (2) is configured to provide a trigger signal (11) for the control of the optical transmitter (3), an improved compensation of the optoelectronic detection device for errors resulting from temperature or ageing should be achieved. This is achieved in that the optical receiver (2) is configured to provide the trigger signal (11) to the evaluation device (10), the optical transmitter (3) is configured to provide a feedback signal (12) to the evaluation unit (10), wherein the feedback signal (12) corresponds to the time point of the transmission of the transmitted electromagnetic pulse (5) by the electromagnetic pulse generator (4), and the evaluation device (10) is configured to determine the time difference between the trigger signal (11) and the feedback signal (12).