Control with enhanced sensing capabilities
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Solution Overview
Problem
Existing control devices for environmental conditions, such as light or ceiling fans, face issues with skewed ambient condition readings due to heat from power consumption and mounting location, and snap fit engagements in compact spaces face challenges with limited elastic deformation of thermoplastic materials.
Innovation Solution
The solution involves an apparatus with a temperature sensor and thermal antenna, along with a humidity sensor and power converter, utilizing a convective airflow system to improve sensing accuracy and a snap fit engagement mechanism using overlapping cantilever springs to enhance connection depth without exceeding the elastic limit of the materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is included on the device itself to sense ambient conditions, then the device can regulate its operation based on environmental data, but the sensor readings become skewed due to heat from power consumption and mounting location
Solution Approach 1:
The housing is divided into separate compartments that physically isolate the sensor from the power converter. The sensor is positioned in a first compartment while the power converter is positioned in a second compartment, preventing thermal interference from affecting sensor readings.
Solution Approach 2:
A thermal barrier or insulating structure is introduced between the sensor and the power converter to block heat transfer. This intermediary element prevents the harmful thermal effects from reaching the sensor while allowing the device to function as a unified system.
2Strength
If snap fit engagement is used in compact spaces to form strong connections, then connection strength can be achieved, but the elastic limit of thermoplastic materials is exceeded
Solution Approach 1:
The snap fit mechanism transitions from a single-dimension linear engagement to a multi-dimensional engagement involving radial and axial components. The resilient arm bends in multiple directions and the snap feature engages with a recess at an angle, distributing stress across multiple dimensions and reducing peak stress on the thermoplastic material.
Solution Approach 2:
The snap fit mechanism incorporates a resilient arm that can dynamically flex and deform during the engagement process. This dynamic behavior allows the mechanism to absorb energy and distribute forces over time, preventing excessive static stress that would exceed the elastic limit of the thermoplastic material.
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 approach provides accurate environmental condition monitoring and improved snap fit engagement, reducing strain on components while maintaining a strong connection, thus addressing the challenges of heat-induced skewing and material deformation.
Implementation Method 1
a convective airflow system to improve sensing accuracy
Implementation Method 2
A thermal antenna is connected to the temperature sensor
Implementation Method 3
An insulator (thermal) may be provided for insulating the thermal antenna and the temperature sensor from the power converter
Data Source
AI summary
An apparatus for controlling a device in connection with a sensed temperature in a space includes an actuator for regulating the operation of the device, a temperature sensor for providing the sensed temperature, and a thermal antenna connected to the temperature sensor. The thermal antenna may form part of the exposed face of the apparatus. A housing may include partitions, such as a plurality of circuit boards, for communicating with the actuator to provide control for the device. The partitions or circuit boards are spaced apart to form ventilation channels for ventilating heat from the housing, including byway of an encouraging convective flow.