Vehicle Recorder Dynamic Storage for Power and Capacity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drive recorders in vehicles face issues with excessive power consumption and unnecessary recording of images when parked, leading to battery exhaustion and reduced recording capacity, due to erroneous sensor detections from vibrations and other non-thief-related events.
Innovation Solution
An information recording apparatus that uses a control portion to manage recording periods based on sensor detections, storing data for a shorter initial period upon abnormal condition detection and extending it if the condition persists, thereby reducing unnecessary recording and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If images are captured and recorded for a predetermined time period whenever an abnormal condition is detected by the G sensor, then theft detection capability is improved, but power consumption increases and recording capacity is wasted due to erroneous detections
Solution Approach 1:
The patent applies dynamics by making the recording time period variable rather than fixed. The control portion adjusts the recording duration dynamically based on whether multiple abnormal conditions are detected within a predetermined time. When multiple abnormalities occur, a longer recording period is applied; when only one occurs, a shorter period is used. This dynamic adjustment resolves the contradiction by adapting the system's response to actual threat levels.
Solution Approach 2:
The patent changes the parameter of recording time period based on detection patterns. By monitoring the frequency and timing of abnormal condition detections, the system modifies the recording duration parameter to match the likelihood of actual theft. This parameter change allows the system to maintain high reliability for theft detection while reducing power consumption and preserving recording capacity by avoiding unnecessary long-duration recordings for false alarms.
2Reliability
If images are captured and recorded for a predetermined time period upon abnormal condition detection, then security monitoring is improved, but recording capacity is reduced due to unnecessary recordings from erroneous detections
Solution Approach 1:
The system dynamically adjusts the recording duration based on the pattern of abnormal condition detections. When multiple abnormalities are detected within a predetermined time, indicating a higher likelihood of actual theft, the system applies a longer recording period. When only isolated abnormalities occur, a shorter recording period is used. This dynamic approach preserves recording capacity by minimizing unnecessary recordings while maintaining security monitoring reliability.
Solution Approach 2:
The patent modifies the recording time period parameter according to detection frequency and timing. By analyzing whether multiple abnormal conditions occur within a specific time window, the system changes the recording duration parameter to match the assessed threat level. This parameter adaptation ensures that recording capacity is preserved for genuine security events while still maintaining effective security monitoring.
3Measurement precision
If the camera operates continuously to capture images for theft detection, then detection accuracy is improved, but battery exhaustion occurs due to high power consumption when parked
Solution Approach 1:
The patent implements periodic action by triggering image capture and recording only at specific intervals based on abnormal condition detections rather than operating continuously. The system monitors for abnormal conditions using the G sensor and activates the camera and recording function only when such conditions are detected. This periodic activation based on event triggers maintains detection accuracy for security events while dramatically reducing power consumption during parked periods when the vehicle is not in use.
Data Source
AI summary
Image and sound information are acquired from a camera and a microphone and the information is stored into a second RAM for a first time period from detection of occurrence of an abnormal condition of a vehicle by a sensor. When occurrence of an abnormal condition of the vehicle has been detected by the sensor during the first time period from the detection of occurrence of an abnormal condition of the vehicle, image and sound information is acquired from the camera and the microphone and the information is stored into the second RAM for a second time period from the previous detection of occurrence of an abnormal condition of the vehicle, and the image and sound information stored into the second RAM for the second time period Tb are stored into a nonvolatile ROM.