Multi-Function Sensor Integrating Temperature and Pressure Sensing
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Solution Overview
Problem
Existing combined temperature and pressure sensors are complex and costly to assemble, leading to inefficiencies in manufacturing and potential defective units, which is a challenge in mass-produced applications like automotive systems where robust and reliable sensors are needed.
Innovation Solution
A multi-function sensor design featuring a flexible substrate with a unitary sensing circuit that includes a pressure sensor bonded to a carrier and a temperature sensor oriented for exposure, with a protective cap for environmental protection, allowing for simple and cost-effective manufacturing by using a sleeve with opposing ridges to secure the temperature sensor relative to the pressure sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate sensing elements are used for temperature and pressure measurement, then sensing functionality is achieved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent combines the temperature sensor and pressure sensor into a single integrated sensor head assembly. The temperature sensor is mounted on the sensor body with its sensing element positioned in the fluid medium, while the pressure sensor is integrated into the same assembly, eliminating the need for separate sensing elements and reducing overall device complexity.
Solution Approach 2:
The sensor head is designed as a universal assembly that simultaneously performs both temperature and pressure measurement functions. The integrated design allows a single component to fulfill multiple sensing roles, reducing the number of parts and simplifying the overall sensor system.
2Manufacturing precision
If laser welding process is used for assembly, then precise joining is achieved, but manufacturing cost and time increase
Solution Approach 1:
The patent replaces the laser welding process with a mechanical assembly approach. The sensor components are designed to be assembled using standard mechanical fastening methods, which are simpler, faster, and less costly to implement in mass production while still achieving precise and reliable joining.
3Adaptability or versatility
If multiple separate sensing elements are used, then comprehensive measurement is achieved, but assembly reliability decreases
Solution Approach 1:
By integrating the temperature and pressure sensors into a single sensor head assembly, the patent reduces the number of connection points and assembly interfaces. This integration minimizes potential failure points and improves overall assembly reliability while maintaining comprehensive measurement capability.
Data Source
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AI summary
A multi-function sensor includes a body that includes a sensing circuit disposed on a substrate, the sensing circuit including a pressure sensor and a temperature sensor, the temperature sensor being disposed on a flexible portion of the substrate. A method of fabrication and additional embodiments are disclosed.