Ranging Device Standby Mode Power Optimization
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Solution Overview
Problem
Existing ranging devices, such as Lidars, often operate in a single normal state, leading to reduced efficiency in scenarios where detection is not necessary, resulting in unnecessary power consumption and potential wear and tear.
Innovation Solution
The ranging device is designed with two working states: a normal state where it actively transmits light pulses and determines object distance and orientation, and a standby state where the transmitter is inactive but the optical element remains in motion, optimizing power usage and extending device lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ranging device operates continuously in normal state, then detection coverage is maintained, but power consumption increases and device lifespan decreases
Solution Approach 1:
The patent implements dynamic state switching between normal operation and standby modes. The optical element continues to move in standby state to maintain readiness for quick transition to detection mode, while the transmitter remains inactive to conserve energy. This dynamic operational state management resolves the contradiction between continuous detection capability and power consumption.
Solution Approach 2:
The system employs periodic operation by alternating between active transmission phases and standby phases. During standby, the transmitter suspends operation while the optical element maintains motion, creating a periodic cycle that reduces average power consumption while preserving the ability to quickly resume full detection when needed.
2Use of energy by moving object
If the transmitter is suspended in standby state, then power consumption is reduced, but detection capability is temporarily limited
Solution Approach 1:
The optical element continues to move during standby state as a preliminary action to maintain its scanning position and readiness. This ensures that when the transmitter resumes operation, the system can quickly transition to full detection capability without requiring repositioning or warm-up time, thus preserving productivity while saving energy.
Solution Approach 2:
The system dynamically adjusts its operational mode by suspending only the transmitter while maintaining optical element motion. This selective dynamic operation allows the system to scale its detection capability according to operational needs, reducing power consumption during low-demand periods while maintaining the ability to rapidly restore full detection capability when required.
3Speed
If the optical element is kept in motion during standby state, then quick transition to detection mode is enabled, but energy is consumed without active detection
Solution Approach 1:
The system segments the operational functions by separating the optical element's motion function from the transmitter's detection function. During standby, only the optical element's motion is maintained at reduced power levels, while the transmitter is completely suspended. This segmentation allows the system to maintain transition readiness with minimal energy expenditure.
Solution Approach 2:
The system applies partial action by maintaining only the necessary portion of the detection system (optical element motion) during standby, rather than sustaining full detection capability. This partial operation provides sufficient transition speed while consuming significantly less energy than full operation, striking an optimal balance between readiness and power consumption.
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 dual-state operation enhances the ranging device's efficiency by minimizing power consumption when not in use and extending its service life, while maintaining the ability to quickly switch to active mode when needed.
Implementation Method 1
the transmitter transmits a light pulse sequence
Implementation Method 2
the optical element is kept in a motion state to change the light pulse sequence to different directions to emit at different moments
Implementation Method 3
the detector receives at least part of reflected light reflected by an object and converts the at least part of the reflected light into an electrical signal
Implementation Method 4
Distance between the object and the Lidar in transmission direction can be calculated through measurement of time delay of the echo
Data Source
AI summary
A ranging device includes a transmitter, a scanner including an optical element, and a detector. Working states of the ranging device after power-on include a normal state and a standby state. In the normal state, the transmitter transmits a light pulse sequence, the optical element is kept in a motion state to change the light pulse sequence to different directions to emit at different moments, and the detector receives at least part of reflected light reflected by an object and converts the at least part of the reflected light into an electrical signal, and determines at least one of a distance or an orientation of the object with respect to the ranging device according to the electrical signal. In the normal state, the transmitter suspends transmitting the light pulse sequence and the optical element is kept in the motion state.