In-Vehicle Recording Apparatus Data Deletion Logic

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Solution Overview

Problem

Existing in-vehicle recording apparatuses fail to efficiently manage storage by not deleting old vehicle situation data, leading to unnecessary data accumulation and potential storage capacity issues.

Innovation Solution

An in-vehicle recording apparatus is designed with a configuration that includes an information acquisition unit, a storage unit, and a processing unit capable of recording and deleting vehicle situation data based on predefined event types and conditions, such as the state of a switch indicating vehicle operation, to ensure timely deletion of data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If vehicle situation data is continuously recorded in the storage apparatus without deletion, then the data retention period is extended and more historical data is preserved, but the storage apparatus becomes filled with unnecessary old data leading to storage capacity exhaustion and increased processing load

Engineering Contradiction:

Improvedata retention periodVSAvoidstorage capacity

Core Design Contradiction:

Duration of action of stationary objectVSQuantity of substance

Solution Approach 1:

The patent implements automatic deletion of vehicle situation data from the storage apparatus based on predetermined deletion conditions (time-based deletion, event-based deletion, or storage capacity-based deletion). This allows the system to discard old or unnecessary data while recovering storage capacity for new recordings, thus resolving the contradiction between retaining historical data and preventing storage exhaustion

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The system performs periodic checks of deletion conditions and automatically deletes data at appropriate intervals. The control unit continuously monitors storage capacity and data age, and executes deletion operations periodically when predetermined conditions are met, balancing data retention with storage management

Inventive Principle:

Principle #19Periodic action

2Quantity of substance

If vehicle situation data is deleted frequently to maintain storage capacity, then storage capacity is preserved and processing load is reduced, but valuable historical data is lost

Engineering Contradiction:

Improvestorage capacityVSAvoidhistorical data

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

The system selectively deletes data based on predetermined conditions rather than frequent indiscriminate deletion. Deletion occurs only when specific criteria are met (data exceeding time threshold, specific event types, or when storage capacity threshold is reached), thereby preserving valuable historical data while maintaining adequate storage capacity

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The system changes the state of data from retained to deleted based on parameter thresholds such as time duration, event type classification, and storage capacity percentage. By monitoring these parameters and triggering deletion only when thresholds are exceeded, the system minimizes information loss while maintaining storage capacity

Inventive Principle:

Principle #35Parameter changes

3Quantity of substance

If deletion processing is executed continuously to maintain optimal storage capacity, then storage capacity is optimized and unnecessary data is removed, but the processing load on the recording apparatus increases

Engineering Contradiction:

Improvestorage capacityVSAvoidprocessing load

Core Design Contradiction:

Quantity of substanceVSUse of energy by moving object

Solution Approach 1:

Instead of continuous deletion processing, the system implements periodic deletion operations triggered by specific conditions (time intervals, storage capacity thresholds, or event occurrences). This reduces the frequency of processing operations while still maintaining optimal storage capacity, thereby lowering the processing load and energy consumption

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The control unit automatically monitors storage capacity and deletion conditions, and executes deletion operations autonomously when conditions are met. This self-service mechanism eliminates the need for manual intervention and optimizes processing by only performing deletions when necessary, reducing overall processing load

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11527116B2In-vehicle recording apparatus

Publication Date: 2022.12.13 TOYOTA JIDOSHA KK

AI summary

Provided is an in-vehicle recording apparatus including an information acquisition apparatus configured to acquire vehicle situation data, a storage apparatus, and a recording processing execution apparatus configured to execute, when an event defined in advance for the vehicle has occurred, recording processing of recording the vehicle situation data, which is defined in advance in accordance with a type of the event that has occurred, in the storage apparatus, the recording processing execution apparatus being further configured to, when a deletion condition including a deletion trigger condition is satisfied, delete vehicle situation data corresponding to the satisfied deletion trigger condition from the storage apparatus.