Distance Measurement Amplifier Clamping for Accurate Time Extraction
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Solution Overview
Problem
Distance measuring devices face challenges in accurately measuring distance due to signal noise and fluctuating signal intensities, which can lead to distortion in time information extraction, especially when the sampling speed is high and noise signals trigger comparators, causing errors in the measured time information.
Innovation Solution
The implementation of an amplification circuit with a clamping circuit to prevent operational amplifier saturation by clamping input signals within a certain range, and a distance detection device that includes a photoelectric conversion circuit and an amplification circuit with an operational amplifier and clamping circuit to manage electrical pulse signals, ensuring they remain within a fluctuation range to prevent noise-induced errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the voltage threshold is adjusted during use to handle signal fluctuations, then the adaptability to varying signal intensities is improved, but the ease of operation deteriorates due to difficulty in adjusting the threshold at high sampling speeds
Solution Approach 1:
The system performs automatic threshold adjustment without requiring manual intervention. The control unit automatically determines and adjusts the voltage threshold based on the detected signal characteristics and noise levels, enabling the system to adapt to varying signal intensities while maintaining ease of operation at high sampling speeds
Solution Approach 2:
The voltage threshold is made dynamic rather than fixed, allowing it to automatically adapt to changing signal conditions. The control unit continuously monitors signal fluctuations and adjusts the threshold in real-time, enabling the system to handle varying signal intensities effectively during high-speed sampling operations
2Device complexity
If the fixed voltage threshold is used for time information collection, then the device complexity is reduced, but the measurement precision deteriorates due to noise signals triggering the comparator and causing distortion
Solution Approach 1:
The control unit performs preliminary analysis of the electrical signal characteristics and noise levels before setting the voltage threshold. By pre-adjusting the threshold based on detected signal conditions, the system prevents noise-induced comparator triggering and maintains accurate time information measurement without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The system implements feedback control where the control unit continuously monitors the electrical signal and adjusts the voltage threshold based on the detected signal-to-noise ratio. This feedback mechanism ensures that the threshold remains optimized for accurate time information extraction while preventing false triggering by noise signals, maintaining measurement precision without excessive complexity
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 effectively reduces noise-induced errors and maintains accurate time information extraction by stabilizing the input signal range, improving the reliability of distance measurements even under high sampling speeds and varying environmental conditions.
Implementation Method 1
a photoelectric conversion circuit configured to sequentially receive a plurality of light pulse signals of a plurality of light pulses in the light pulse sequence transmitted by the transmitting circuit reflected by an object, and sequentially convert the plurality of received light pulse signals into a plurality of electrical pulse signals
Data Source
AI summary
Embodiments of the present disclosure provide an amplification circuit. The amplification circuit includes an operational amplifier; and a clamping circuit being respectively connected to an input terminal and an output terminal of the operational amplifier for clamping an input signal of the amplification circuit to cause the input signal of the amplification circuit to fluctuate within a certain range to prevent the operational amplifier from generating a saturating output.