Fan Control System Power Line Signal Embedding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fan control systems face issues with interference between fan controls due to overlapping wireless signals, leading to unintended activation of multiple fans when using a single controller, and require separate control lines for operation.
Innovation Solution
A fan control system that integrates a switchable first converter to modify the domestic power signal's attributes for a preset duration, allowing the second converter to adjust the output signal for changing the fan's rotational speed, eliminating the need for a separate control line and reducing interference by using a wired connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless control signals are used to control multiple fans, then control flexibility is improved, but interference between fan controls occurs leading to unintended activation
Solution Approach 1:
The patent introduces a control signal embedding mechanism where the controller embeds its unique identification code into the control signal transmitted through the power line. This intermediary encoding scheme allows the fan to verify the authenticity of the control signal, preventing unintended activation from other controllers while maintaining wireless control flexibility.
Solution Approach 2:
The system implements a feedback mechanism where the fan receives the control signal, extracts the identification code, and verifies it against its own identification. This feedback verification process ensures that only the intended fan responds to the control signal, eliminating interference issues while preserving ease of operation.
2Reliability
If a separate control line is used to control the fan, then control reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the control function and power supply function into a single power line. The controller transmits both power and control signals through the existing power line infrastructure, eliminating the need for separate control lines while maintaining control reliability through signal embedding and verification mechanisms.
Solution Approach 2:
The power line is given multi-functionality by enabling it to carry both power transmission and control signal transmission. This universal usage of the power line simplifies the overall system structure by eliminating dedicated control lines, while the embedded identification code mechanism ensures reliable control.
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
The system effectively controls fan speed without interference and reduces hardware costs by integrating control functionality into the power line, ensuring reliable operation and minimizing unintended fan activations.
Implementation Method 1
The first converter is switchable, in response to receipt of the operation signal, from a normal mode where the domestic power signal is directly outputted by the first converter as the converted power signal, to a converting mode where an attribute of the domestic power signal is varied for a preset duration
Implementation Method 2
The second converter is configured to output an output signal based on the converted power signal for driving operation of the fan
Data Source
AI summary
A fan control system includes an input unit receiving a domestic power signal, an operation controller, a first converter connected to the input unit and the operation controller, and a second converter connected to the first converter and a fan. Upon receipt of an operation signal outputted by the operation controller, the first converter switches from a normal mode where the domestic power signal is directly outputted as a converted power signal, to a converting mode where the domestic power signal having an attribute thereof varied for a preset duration is outputted as the converted power signal. The second converter outputs an output signal based on the converted power signal for controlling rotational speed of the fan.