Vehicle Telemetry Delta Encoding for Limited Data Transmission

Solution Overview

Problem

Aircraft flight recorders struggle to record and transmit the vast amount of telemetry data from numerous sensors due to limited capacity and impracticality of transmitting all data, leading to incomplete data sets that can hinder accident investigation and maintenance analysis.

Innovation Solution

A data processing device and method that generates and encodes sets of sampled values from sensors, focusing on changes between sampling times, allowing for efficient transmission of encoded data elements to a remote unit for decoding and recovery of original sampled values, thereby reducing data transmission requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If all measurement data from numerous sensors is recorded and transmitted, then data completeness is improved, but communication channel burden and transmission complexity increase

Engineering Contradiction:

Improvedata completenessVSAvoidtransmission complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The system extracts only the essential information needed for analysis by computing differences between consecutive sampled values. Instead of transmitting all raw sensor data, only the change values (deltas) are transmitted, which significantly reduces data volume while preserving the essential information about system state changes.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent transforms the data representation by changing from absolute values to difference values (parameters). Each transmitted value represents a change from the previous state rather than the absolute state itself, reducing redundancy and communication overhead while maintaining data integrity for reconstruction at the receiving end.

Inventive Principle:

Principle #35Parameter changes

2Loss of information

If sampled data from all sensors is transmitted during flight, then data availability is improved, but communication channel capacity requirements increase

Engineering Contradiction:

Improvedata availabilityVSAvoiddata volume

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The system extracts only the essential information needed for analysis by computing differences between consecutive sampled values. Instead of transmitting all raw sensor data, only the change values (deltas) are transmitted, which significantly reduces data volume while preserving the essential information about system state changes.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent transforms the data representation by changing from absolute values to difference values (parameters). Each transmitted value represents a change from the previous state rather than the absolute state itself, reducing redundancy and communication overhead while maintaining data integrity for reconstruction at the receiving end.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If measurement data is compressed and archived on ground equipment, then transmission burden is reduced, but data processing time and storage requirements increase

Engineering Contradiction:

Improvetransmission burdenVSAvoiddata processing time

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The system performs preliminary processing on the data before transmission by calculating differences between consecutive samples. This preprocessing step reduces the data volume that needs to be transmitted and stored, while the simplified data structure enables faster processing and reconstruction at the receiving end, offsetting the initial processing time investment.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11451886B2Data processing devices, data processing units, methods and computer programs for processing telemetry data

Publication Date: 2022.09.20 V NOVA INT LTD

AI summary

A data processing device for processing telemetry data obtains sampled data based on output data from a plurality of sensors associated with a vehicle. The data processing device generates first and second sets of sampled values using the sampled data. The first set of sampled values are associated with a first sampling time and the second set of sampled values are associated with a second, subsequent sampling time. The data processing device derives a set of data elements, a data element being indicative of a measure of a change between a sampled value in the first set and a corresponding sampled value in the second set, a position of a given data element in the set of data elements having been determined based on at least one mapping rule. The data processing device encodes the set of data elements and outputs data comprising at least the encoded set of data elements for transmission to a remote data processing unit.