Integrated Temperature-Pressure Sensor With Independent Resistor Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing temperature and pressure detection devices are separate, leading to a large and cumbersome structure that is inconvenient to assemble and use when both measurements are required.
Innovation Solution
A temperature and pressure sensor with a substrate having both pressure and temperature sensing areas, utilizing first and second sensing resistors with specific gage factors and temperature coefficients of resistance to allow independent detection of pressure and temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate temperature detection device and pressure detection device are arranged on the object to be detected, then the detection functions are complete, but the structure and volume become large
Solution Approach 1:
The patent combines temperature detection and pressure detection functions into a single sensor device. The substrate integrates both temperature sensing areas with first sensing resistors and second sensing resistors, and pressure sensing areas with third sensing resistors, eliminating the need for separate detection devices and reducing overall device volume.
Solution Approach 2:
The sensor substrate is designed as a multi-functional component that simultaneously performs temperature detection and pressure detection. By integrating multiple sensing circuits on one substrate, the device achieves universal detection capability for both temperature and pressure parameters without requiring multiple separate devices.
2Measurement precision
If separate temperature detection device and pressure detection device are arranged on the object to be detected, then the detection functions are complete, but the structure becomes complex and assembly becomes inconvenient
Solution Approach 1:
The patent merges temperature detection circuits and pressure detection circuits into a single integrated sensor structure. The substrate contains all necessary sensing areas and resistors for both detection functions, simplifying the overall device structure and making assembly more convenient compared to separate devices.
Solution Approach 2:
The substrate is segmented into distinct functional areas: temperature sensing areas with first and second sensing resistors, and pressure sensing areas with third sensing resistors. This segmentation allows each detection function to operate independently while being integrated on the same substrate, maintaining functional clarity while reducing structural complexity.
3Measurement precision
If first sensing resistors with different temperature coefficients of resistance are used in temperature detection circuit, then temperature information can be detected, but the circuit becomes more complex
Solution Approach 1:
The patent utilizes changes in temperature coefficients of resistance as a key parameter to enable temperature detection. By selecting first sensing resistors with different temperature coefficients of resistance, the circuit can detect temperature variations through resistance changes. This parameter-based detection method is implemented directly in the resistor selection without requiring additional complex circuitry.
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 sensor achieves compact size and ease of use by enabling separate and independent detection of pressure and temperature, maintaining signal stability during deformation.
Implementation Method 1
the first sensing resistors located in the pressure sensing area are constituted as a pressure detection circuit... When the substrate is stressed and a bending deformation of the substrate is generated, the first sensing resistors on the two surfaces of the pressure sensing area will generate different deformations, so that different resistance changes are generated
Implementation Method 2
The first sensing resistors and the second sensing resistors have a same gage factor and different temperature coefficients of resistance... the first sensing resistor and the second sensing resistor located in the temperature sensing area are constituted as a temperature detection circuit
Data Source
AI summary
A temperature and pressure sensor includes: a substrate, a first sensing resistor, and a second sensing resistor. The substrate has multiple pressure sensing areas and multiple temperature sensing areas. Two opposite surfaces of each pressure sensing area are respectively provided with the first sensing resistors which are constituted as a pressure detection circuit. When the substrate is stressed and deformed, the first sensing resistors of the pressure sensing area may generate different deformations and different resistance changes, so that a change of an electrical signal is caused and pressure information is output. At least one surface of the temperature sensing area is provided with a first sensing resistor and a second sensing resistor which are constituted as a temperature detection circuit. The pressure detection circuit and the temperature detection circuit may detect pressure and temperature separately and independently.