RFID Temperature Sensor for Closed-Circuit Respirator Gas Circuit
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Solution Overview
Problem
Closed-circuit respirators face temperature regulation issues due to the continuous heat production by CO2 absorbers, leading to uncomfortable breathing gas temperatures for users, necessitating effective cooling management.
Innovation Solution
A control system incorporating a temperature sensor, a temperature-reading unit, and a control unit, utilizing RFID technology for wireless communication, to monitor and manage the breathing gas temperature, ensuring safety and optimizing the cooling device's usage by estimating the remaining duration of effective cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling device with coolant is used to cool the breathing gas circuit, then the breathing gas temperature is reduced to comfortable levels, but the device complexity and weight increase due to the need for continuous cooling provisions
Solution Approach 1:
The patent replaces the mechanical temperature measurement system with a magnetic field-based RFID sensing system. The temperature sensor is integrated into the RFID tag, allowing wireless communication of temperature data without mechanical connections or additional cooling control mechanisms.
Solution Approach 2:
The patent introduces an RFID tag as an intermediary carrier that holds both the temperature sensor and identification information. This intermediary enables wireless data transfer between the temperature measurement point in the breathing gas circuit and the external reading unit, eliminating the need for complex wired connections.
2Measurement precision
If wired temperature sensors are used in the breathing gas circuit, then accurate temperature monitoring is achieved, but the fault liability and complexity increase due to physical connections
Solution Approach 1:
The patent eliminates mechanical wiring by using RFID wireless communication technology. The temperature sensor integrated in the RFID tag communicates temperature data magnetically through the RFID field, removing physical connection points that could fail or become disconnected.
Solution Approach 2:
The RFID tag serves multiple functions simultaneously - it provides identification information, stores temperature sensor data, and enables wireless communication. This self-contained approach reduces the need for separate systems and connections, thereby reducing overall system complexity and potential failure points.
3Measurement precision
If traditional temperature monitoring systems are implemented, then temperature control is achieved, but the integration complexity and weight of the respirator increase
Solution Approach 1:
The RFID tag performs multiple functions: it provides unique identification for the respirator or components, stores temperature sensor readings, and enables wireless communication. This multi-functionality eliminates the need for separate identification systems and temperature monitoring infrastructure, reducing overall weight.
Solution Approach 2:
The RFID tag acts as a lightweight intermediary that carries temperature data wirelessly. By using the magnetic field for communication rather than physical wiring or heavier wired sensor systems, the overall weight of the temperature monitoring system is significantly reduced.
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 system effectively monitors and forecasts breathing gas temperatures, preventing overheating, enhancing user safety, and simplifying integration into existing respirators by reducing weight and fault liability through wireless communication and energy-efficient RFID tags.
Implementation Method 1
a temperature sensor unit (110) embodied by means of a radio frequency identification (RFID) tag including a temperature sensor, which is configured to send a temperature signal in the presence of a corresponding temperature polling, the temperature signal indicating the temperature currently present in a surrounding area
Implementation Method 2
The temperature sensor unit (110) embodied by means of a radio frequency identification (RFID) tag including a temperature sensor, which is configured to send a temperature signal in the presence of a corresponding temperature polling
Data Source
AI summary
A control system, for controlling a closed-circuit respirator breathing gas circuit, includes a temperature sensor, a temperature-reading unit and with a control unit. The temperature sensor is configured to send a temperature signal in the presence of a corresponding temperature polling. The temperature signal indicates the temperature currently present in an area surrounding the temperature sensor. The temperature-reading unit is arranged in the closed-circuit respirator at a spaced location from the breathing gas circuit and the temperature sensor, and is configured to trigger the temperature polling at the temperature sensor by sending a polling signal, and to receive the temperature signal sent by the temperature sensor. The control unit is signal connected to the temperature-reading unit and is configured to determine the temperature indicated by the temperature signal in the area surrounding the temperature sensor and to output a control signal as a function of this temperature.