Method and apparatus for system diagnostics using accelerometers

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Solution Overview

Problem

HVAC systems face challenges in detecting component malfunctions due to the lack of effective vibration monitoring, which can lead to noise and potentially catastrophic failures.

Innovation Solution

The implementation of accelerometers to measure vibration data from HVAC components, with a controller comparing this data to pre-defined baseline values to detect deviations and alert a monitoring device of potential faults.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If vibration monitoring is implemented using accelerometers, then component malfunction detection capability is improved, but device complexity increases

Engineering Contradiction:
Improvecomponent malfunction detection capabilityVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical diagnostic systems with accelerometer-based vibration sensing. The accelerometers convert mechanical vibrations into electrical signals that can be processed electronically, simplifying the overall diagnostic system while improving detection capability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces accelerometers as intermediary devices between the HVAC components and the diagnostic system. These accelerometers serve as sensors that mediate the detection process by converting physical vibrations into measurable electrical signals for analysis.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If vibration monitoring is implemented to detect malfunctions early, then system reliability is improved, but loss of time for data processing and analysis increases

Engineering Contradiction:
Improvesystem reliabilityVSAvoiddata processing and analysis time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent establishes baseline vibration data in advance for each HVAC component under normal operating conditions. This preliminary characterization allows for rapid comparison with actual vibration data, enabling quick malfunction detection without extensive real-time analysis.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements a feedback mechanism where actual vibration data is continuously compared against baseline data, and alerts are generated when deviations exceed predetermined thresholds. This automated feedback loop reduces manual analysis time and enables rapid response to potential malfunctions.

Inventive Principle:
Principle #23Feedback

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 method enables early detection of component malfunctions, preventing noise and potential failures by monitoring vibration patterns and alerting service providers before issues arise.

Implementation Method 1

measuring, by an accelerometer associated with at least one component of the HVAC system, of vibration of the at least one component

Methodology Applied
Scientific EffectVibration: Vibration

Data Source

PatentUS10364999B2Method and apparatus for system diagnostics using accelerometers
Publication Date: 2019.07.30 LENNOX IND INC
  • US10364999B2 patent drawing
  • US10364999B2 patent drawing
  • US10364999B2 patent drawing

AI summary

A method of monitoring component health of a heating, ventilation, and air conditioning (HVAC) system. The method includes measuring, by an accelerometer associated with at least one component of the HVAC system, of vibration of the at least one component, receiving, by a controller, actual vibration data reflective of the measured vibration, determining, using the controller, whether the actual vibration data differs from pre-defined acceptable baseline vibration data by more than an acceptable amount, and responsive to a positive determination in the determining step, forwarding, by the controller, information regarding the determination to a monitoring device to monitor operation of the component.