Smart actuator with fault detection and resolution
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Solution Overview
Problem
Conventional HVAC actuators lack the capability to automatically detect and correct installation errors or faults, and do not provide real-time updates to technicians, leading to potential inefficiencies and maintenance challenges in HVAC systems.
Innovation Solution
An actuator system with a processing circuit that measures characteristics, such as temperature or position, to identify installation errors, modifies control programs, and transmits notifications or messages to remote devices for corrective actions, including reversing control polarity or suggesting tools needed for manual correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional actuators are used to control HVAC devices, then the basic control function is achieved, but the ability to automatically detect and correct installation errors is lost
Solution Approach 1:
The patent combines multiple functions (control, measurement, fault detection, and automatic correction) into a single integrated actuator system. The processing circuit integrates temperature sensing, position monitoring, and control logic to automatically detect installation errors and correct control polarity without external intervention, resolving the contradiction by merging functions rather than adding separate systems.
Solution Approach 2:
The actuator system performs self-diagnosis and self-correction of installation errors. When an installation error is detected through temperature measurements and position monitoring, the processing circuit automatically modifies the control program to correct the polarity issue, enabling the system to service itself without requiring external detection or manual correction.
2Difficulty of detecting and measuring
If real-time monitoring and automatic correction features are added to actuators, then fault detection capability is improved, but device complexity increases
Solution Approach 1:
The system implements feedback loops where temperature measurements from sensors and position feedback from the drive device are continuously monitored by the processing circuit. This feedback mechanism enables automatic detection of installation errors by comparing expected versus actual system behavior, improving detection accuracy through continuous real-time monitoring rather than complex one-time diagnostics.
Solution Approach 2:
The actuator performs preliminary diagnostic actions automatically upon installation or during operation. The processing circuit pre-configures test sequences that measure temperature changes and position responses to detect installation errors before they cause system failure, enabling early detection without requiring complex real-time analysis of multiple parameters simultaneously.
3Productivity
If automatic corrective actions are implemented, then maintenance downtime is reduced, but the risk of incorrect automatic modifications increases
Solution Approach 1:
The control program modification is implemented dynamically based on real-time detection of installation errors. Rather than requiring static pre-programming of all possible corrections, the system adapts the control polarity dynamically when specific error conditions are detected through temperature and position measurements, ensuring accurate corrections only when genuinely needed while maintaining normal operation otherwise.
Data Source
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AI summary
An actuator for controlling a flow regulation device. The actuator includes a drive device coupled to the flow regulation device and a motor coupled to the drive device and operable to move the drive device. The actuator further includes a processing circuit configured to receive a first measurement of a characteristic, control the actuator to reposition the flow regulation device in a first direction, receive a second measurement of the characteristic, and detect an installation error associated with at least one of the actuator and the flow regulation device based on the first measurement and the second measurement.