Laser Distance Measurement Module Multiplexed Circuit Resources
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Solution Overview
Problem
Current laser distance measurement devices require multiple apparatuses for multiple emission paths, leading to high power consumption, high cost, and large size due to complex circuitry.
Innovation Solution
The implementation of a laser distance measurement device with multiplexed channels, where at least one device is shared among multiple channels in the transmission, receiving, sampling, and processing circuits, reducing the complexity and resources needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple apparatuses are used to process laser pulse sequences with multiple emission paths, then detection coverage is ensured, but power consumption increases
Solution Approach 1:
The patent merges multiple independent processing apparatuses into a single integrated device that can handle multiple laser pulse sequences with different emission paths. The device includes a laser configured to emit multiple pulse sequences along different paths, a photodetector to receive reflected pulses, and a processor to process signals from all channels, thereby reducing power consumption while maintaining comprehensive detection coverage.
Solution Approach 2:
The patent implements a universal processing device that performs multiple functions: emitting laser pulses along various emission paths, receiving reflected pulses from different directions, and processing signals from multiple channels through time division multiplexing. This multi-functional approach eliminates the need for separate dedicated apparatuses for each emission path, reducing overall power consumption.
2Reliability
If multiple apparatuses are used to process laser pulse sequences with multiple emission paths, then detection coverage is ensured, but cost increases
Solution Approach 1:
The patent combines multiple expensive independent processing apparatuses into a single cost-effective integrated device. By sharing common components such as the laser source, photodetector, and processor across multiple emission paths, the overall manufacturing cost is significantly reduced while maintaining the capability to detect objects across multiple directions.
Solution Approach 2:
The patent creates a universal device that can handle multiple emission paths and detection channels, eliminating the need to manufacture and deploy multiple separate apparatuses. The time division multiplexing approach allows a single device to perform the work of multiple apparatuses, reducing both manufacturing costs and system complexity.
3Reliability
If multiple apparatuses are used to process laser pulse sequences with multiple emission paths, then detection coverage is ensured, but device size increases
Solution Approach 1:
The patent merges multiple apparatuses into a single compact device by integrating the laser emission system, photodetector array, and signal processing unit into one unified structure. The device uses time division multiplexing to handle multiple emission paths sequentially, allowing comprehensive detection coverage without requiring multiple separate physical apparatuses, thereby reducing overall device size.
4Productivity
If multiple apparatuses are used to process laser pulse sequences with multiple emission paths, then processing capability is improved, but circuit complexity increases
Solution Approach 1:
The patent employs time division multiplexing with periodic action to process multiple laser pulse sequences sequentially through a single device. The laser emits pulse sequences along different emission paths at different time intervals, the photodetector receives reflected pulses in a time-ordered sequence, and the processor handles signals from each channel in turn. This periodic processing approach maintains high processing capability while significantly reducing circuit complexity compared to parallel processing of multiple channels simultaneously.
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 approach reduces power consumption, cost, and size while maintaining detection coverage, by allowing multiple channels to share circuit resources in a time-sharing manner.
Implementation Method 1
a laser configured to emit a laser pulse sequence
Implementation Method 2
a photoelectric converter configured to receive each laser pulse sequence reflected by the object to be detected and perform photoelectric conversion on the each laser pulse sequence
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A laser distance measurement device, apparatus, method, and an unmanned aerial vehicle are provided, which can reduce the power consumption and cost for laser distance measurement. The laser distance measurement device includes: a transmission circuit, a receiving circuit, a sampling circuit, and a processing circuit. The transmission circuit is configured to emit at least two laser pulse sequences, wherein the at least two laser pulse sequences have different emission paths. The receiving circuit is configured to receive each reflected laser pulse sequence and perform photoelectric conversion on each laser pulse sequence to obtain each electrical signal of at least two electrical signals. The sampling circuit is configured to sample each electrical signal. The processing circuit is configured to determine a distance to an object to be detected according to sampling results. Drive signals in the transmission circuit that correspond to the at least two laser pulse sequences share at least one device of the receiving circuit, the at least two laser pulse sequences are emitted at different times; and/or at least two electrical signals share at least one of: at least one device of the receiving circuit, at least one device of the sampling circuit, at least one device of the processing circuit, the laser pulse sequences corresponding to the at least two electrical signals are emitted at different times.