Relay Substrate Converting Circuit for Pressure Sensor Voltage Adaptation
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Solution Overview
Problem
The existing pressure sensors face challenges in accommodating various drive voltages and signal types due to the need for multiple product variations and increased production costs, complexity, and component parts, particularly in air-conditioning systems where drive voltages can range from 3.3 V to 24 V and signal types include current, voltage, and digital outputs.
Innovation Solution
A relay substrate with a converting circuit that can transform drive voltages and pressure detection signals, including transformer, voltage-current, and A/D converting circuits, is connected to the pressure sensor via electric wires, allowing for the conversion of drive voltages and signal types, and can be housed in a waterproof case for outdoor installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple product variations are developed to accommodate various drive voltages and signal types, then adaptability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies universality by developing a single pressure sensor design that can interface with multiple control substrates having different drive voltages (3.3V, 5V, 12V, 24V) and signal types (voltage output, current output, digital output) through an integrated converting circuit. This eliminates the need for multiple product variations while maintaining adaptability to various control systems.
Solution Approach 2:
The patent introduces a converting circuit as an intermediary component between the pressure sensor and the control substrate. This converting circuit receives the pressure detection signal from the sensor and transforms it into the required voltage level and signal type for the specific control substrate, thereby mediating the interface between incompatible systems.
2Adaptability or versatility
If ICs with different drive voltages are developed, then adaptability is improved, but manufacturing cost and production unit price increase
Solution Approach 1:
The patent implements a single universal pressure sensor design that can work with control substrates of various drive voltages (3.3V, 5V, 12V, 24V) by incorporating a multi-functional converting circuit. This approach maintains manufacturing simplicity while achieving broad compatibility, avoiding the need to manufacture multiple specialized IC versions.
Solution Approach 2:
The converting circuit serves as an intermediary that bridges the pressure sensor and control substrate, handling the voltage and signal type conversion. This allows the pressure sensor to be manufactured once with standard specifications while the converting circuit adapts to different control substrate requirements, reducing manufacturing complexity and cost.
3Adaptability or versatility
If converting circuits are disposed inside control substrate or pressure sensor, then adaptability is improved, but device complexity and number of component parts increase
Solution Approach 1:
The patent integrates the converting circuit with the pressure sensor in a unified design, creating a multi-functional component that combines both the pressure detection function and the voltage/signal conversion function. This integration reduces the overall number of separate component parts while maintaining the capability to adapt to various drive voltages and signal types.
Data Source
AI summary
A pressure sensor is disclosed. The pressure sensor includes a pressure sensor unit provided with a pressure detecting element configured to receive a drive voltage from a control substrate and electrically send a pressure detection signal to the control substrate so as to detect a pressure of fluid, and a plurality of electric wires connected to the pressure detecting element so as to supply the drive voltage and drawn to the outside so as to send the pressure detection signal. The pressure sensor may also include a relay substrate connected to the plurality of electric wires and having a converting circuit mounted thereon. The converting circuit converts either or both of the drive voltage supplied from the control substrate and the pressure detection signal sent to the control substrate.