Measuring system for measuring pressure and humidity

The capacitive humidity sensor system on flexible substrates addresses measurement limitations by integrating energy harvesting and VLAN technology for efficient pressure and humidity monitoring, achieving accurate and energy-efficient environmental monitoring.

DE102018118612B4Active Publication Date: 2026-06-18B HORIZON GMBH

Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
B HORIZON GMBH
Filing Date
2018-08-01
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing technologies for measuring pressure and humidity are limited in their ability to provide accurate and efficient measurements, particularly when integrated into flexible substrates like textiles, and lack effective energy harvesting and network management solutions.

Method used

A capacitive humidity sensor system with electrodes on a flexible substrate, utilizing a dielectric layer and a moisture layer to measure capacitance changes, combined with energy harvesting and a processing network that includes a central CPU and VLAN switches for efficient data transmission and processing.

Benefits of technology

The system provides accurate humidity and pressure measurements on flexible substrates, enhances energy efficiency through energy harvesting, and optimizes network performance using VLAN technology, enabling real-time monitoring and control of environmental conditions.

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Abstract

Measuring system (1000) for measuring pressure and humidity, comprising at least one device (100) for measuring pressure and humidity - at least one sensor (1) for measuring pressure and humidity, wherein the sensor (1) - comprising at least one capacitor (20) with two electrodes (10, 11) arranged in a horizontal direction (H1) along and on a flexible support material (13), wherein at least one dielectric layer (4) is arranged between the electrodes (10, 11), wherein at least partially liquid-permeable and / or liquid-absorbing moisture layer (3) is arranged on a side facing away from the support material (13) of at least one electrode (10, 11) and / or the dielectric layer (4), wherein the at least one electrode (10, 11) and / or the dielectric layer (4) are arranged in a transverse direction (Q1) between the support material (13) and the moisture layer (3), such that the capacitance is at least partially changed by the liquid at least partially affecting the dielectric layer (4),wherein a processing unit (5) is set up and intended to measure and / or store measured values ​​of the sensor (1) so that a capacitive humidity sensor is created, wherein , the data measured by the sensor (1) are sent from the processing unit (5) to a central CPU (40), wherein this data is processed by the CPU (40), wherein the sensor (1) is additionally a capacitive pressure sensor, wherein the processing unit (5) is additionally configured and designed to measure and / or store a change in capacitance of the capacitor (20) caused by external pressure, and further wherein the capacitive pressure sensor is one in which the change in capacitance due to the deflection of a membrane and the resulting change in a plate distance is evaluated as a sensor effect, such that the membrane is the dielectric layer (4) or the individual capacitor electrodes (10, 11), wherein the sensor (1) has at least one further capacitor (30) which is arranged in the transverse direction (Q1) above or below the capacitor (20) and is spaced apart from the capacitor (20) by a further waterproof layer (15) on or below this further waterproof layer (15), such that a capacitor stack is formed, and further wherein both capacitors (20, 30) are constructed in the same way, and further wherein the two capacitors (20, 30) forming the capacitor stack perform the same functions, and further wherein the measuring system (1000) has at least two sensors (1), wherein the processing unit (5) divides the sensors (1) into groups of at least one sensor (1) based on at least one of the following criteria: - Location of the sensor (1) or sensors (1) on the carrier material (13), wherein the carrier material (13) is divided into area regions, and within an area region only sensors (1) of one group are arranged, - Area of ​​a sensor (1).
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