Air Dryer Humidity Sensor Assembly for Easy Replacement
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Solution Overview
Problem
Existing air dryer systems for vehicles lack the ability to actively control vehicle operations based on humidity levels and have cumbersome humidity sensor replacements due to difficult access locations.
Innovation Solution
A sensor assembly with a fastener body and sensor substrate, coupled with conductive pathways, is designed for easy installation and replacement within air dryers, allowing for real-time humidity sensing and communication with a controller to control air dryer operations and vehicle systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If humidity sensors are installed in air dryers to detect high humidity, then humidity detection capability is improved, but the sensors become difficult to replace due to difficult access locations
Solution Approach 1:
The sensor assembly is divided into separate modular components including a sensor holder, sensor, and electrical connector that can be independently replaced. This modular design allows the sensor to be replaced without replacing the entire air dryer assembly, significantly easing maintenance while maintaining detection capability.
Solution Approach 2:
A sensor holder assembly acts as an intermediary component between the air dryer housing and the humidity sensor. This holder can be easily removed and reinstalled, serving as a mediator that simplifies sensor replacement while ensuring proper positioning and electrical connection.
2Measurement precision
If traditional humidity sensors are used in air dryers, then humidity sensing is achieved, but the sensors cannot actively control vehicle operations and only generate warnings
Solution Approach 1:
The sensor assembly provides continuous humidity feedback to the vehicle's control system, enabling automatic adjustment of air dryer operation and vehicle systems based on real-time humidity levels. This transforms the system from passive warning to active control.
Solution Approach 2:
The sensor assembly serves multiple functions: it detects humidity levels, provides data for control decisions, and enables both air dryer control and broader vehicle system control. This multi-functionality increases automation extent while maintaining sensing precision.
3Measurement precision
If sensors are placed in locations that allow effective humidity detection, then measurement accuracy is improved, but accessibility for replacement deteriorates
Solution Approach 1:
The sensor assembly is segmented into removable components that can be accessed through service ports or openings in the air dryer housing. This allows technicians to replace sensors without disassembling the entire unit, maintaining both measurement accuracy and ease of operation.
Solution Approach 2:
A removable sensor holder serves as an intermediary that bridges the gap between the sensor's optimal detection position and the need for easy access. The holder can be quickly detached through accessible openings, allowing sensor replacement without compromising measurement accuracy.
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
Enables controlled operation of vehicle systems based on humidity levels, improving maintenance accessibility and operational efficiency by integrating sensors that can be easily replaced and communicate effectively with the air dryer and vehicle control systems.
Implementation Method 1
The sensor is configured to sense a humidity of air flowing through the air dryer
Implementation Method 2
one or more conductive bodies protruding from the sensor substrate and one or more first conductive pathways coupled with the one or more conductive bodies
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A sensor assembly includes a fastener body extending from a fastener end to an opposite sensor end along an elongation direction. The sensor end is shaped to be inserted into a sensor port of an air dryer. A sensor substrate includes one or more conductive bodies protruding from the sensor substrate and one or more first conductive pathways coupled with the one or more conductive bodies. The sensor assembly also includes a sensor coupled with the sensor substrate and conductively coupled with the one or more conductive bodies by the one or more first conductive pathways. The sensor is configured to sense a humidity of air flowing through the air dryer. The one or more conductive bodies of the sensor substrate are positioned to engage one or more arcuate or annular conductive pathways in the air dryer in different rotational positions of the fastener body relative to the air dryer.