Radar Apparatus Dynamic Emission Control for Signal Detection
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Solution Overview
Problem
Conventional radar apparatuses unnecessarily emit pulsed light multiple times even after detecting a reflecting object, leading to degradation of the light source and delayed detection, as they do not efficiently stop emission once the object is detected.
Innovation Solution
A radar apparatus with a control section that stops transmission wave emission when the integrated signal indicates the object can be detected, using a detector section to integrate reception signals and determine if the object can be detected by calculating peak values and times of integrated signals, allowing for early cessation of unnecessary emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radar apparatus emits the pulsed light a predetermined number of times to integrate digital data signals, then the detection sensitivity is improved, but the light source degradation is promoted and detection time is delayed when the reception intensity is strong
Solution Approach 1:
The radar apparatus uses feedback from the detector section to control the transmission wave emission. The detector section continuously monitors the integrated signal and provides feedback to the control section, which adjusts the emission count dynamically. When the integrated signal indicates sufficient detection confidence, the control section stops emission early, preventing unnecessary emissions and reducing detection time while maintaining sensitivity.
Solution Approach 2:
The patent applies dynamics by making the emission count variable rather than fixed. The control section adjusts the number of emissions based on real-time detection conditions, transitioning from a static predetermined count to a dynamic adaptive count. This allows the system to optimize between sensitivity and detection time based on actual reception intensity and detection confidence.
2Reliability
If the radar apparatus always emits the pulsed light by a predetermined number of times, then the detection sensitivity is maintained, but the light source degradation is accelerated when the reception intensity is strong
Solution Approach 1:
The feedback mechanism from the detector section to the control section enables the system to monitor detection confidence and adjust emission count accordingly. When the integrated signal indicates sufficient detection, the system stops emission early, reducing energy consumption and preventing light source degradation while maintaining detection sensitivity through effective signal integration.
Solution Approach 2:
The patent applies the principle of discarding unnecessary emissions. Once the detector section determines that the integrated signal provides sufficient detection confidence, the system discards (stops) further emissions that would be unnecessary. This recovers energy that would have been wasted and reduces light source degradation while maintaining adequate detection sensitivity.
3Device complexity
If the radar apparatus uses a fixed predetermined number of emissions, then the system complexity is reduced, but the detection efficiency is lowered when the reception intensity is strong
Solution Approach 1:
The feedback loop adds controlled complexity to the system, enabling dynamic adjustment of emission count based on detection confidence. This feedback mechanism improves detection efficiency by stopping unnecessary emissions while maintaining manageable system complexity through structured control logic that monitors integrated signal characteristics and adjusts emission count accordingly.
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 prevents unnecessary emission of the transmission wave after detecting a reflecting object, enhancing detection sensitivity and reducing light source degradation by stopping emission when the object is confirmed detected, thus improving detection efficiency and accuracy.
Implementation Method 1
receiving the transmission wave reflected from a reflecting object
Implementation Method 2
a light receiving section 20 includes a light-receiving lens 21 for receiving the laser light reflected from a light-reflecting object, and guiding it to a light receiving element (photo diode) 22 which generates a light reception signal
Data Source
AI summary
The radar apparatus includes a transmit/receive section having a function of emitting a transmission wave, receiving the transmission wave reflected from a reflecting object, and outputting a reception signal having a signal level depending on the intensity of the received transmission wave, a control section controlling the transmit/receive section to transmit the transmission wave a predetermined number of times in the same direction, an integrating section successively integrating the reception signal successively outputted from the transmit/receive section to thereby successively form an integrated signal while the transmit/receive section repeatedly emits the transmission wave in the same direction, and a detector section judging whether or not the integrated signal enables detection of the reflecting object.