DE102015214353A1 - Energy-independent vibration sensor - Google Patents
Energy-independent vibration sensor Download PDFInfo
- Publication number
- DE102015214353A1 DE102015214353A1 DE102015214353.8A DE102015214353A DE102015214353A1 DE 102015214353 A1 DE102015214353 A1 DE 102015214353A1 DE 102015214353 A DE102015214353 A DE 102015214353A DE 102015214353 A1 DE102015214353 A1 DE 102015214353A1
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- Germany
- Prior art keywords
- vibration sensor
- capacitor
- energy
- sensor
- evaluation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
Abstract
Es wird ein Schwingungssensor nach Art eines magnetoelastischen Sensors angegeben, der Permanentmagnete aufweist. Der Schwingungssensor weist weiterhin einen Kondensator auf, der in die Empfangsspulen induzierte Energie speichert. Der Kondensator speist bei genügender Aufladung eine Messung und das Versenden eines gewonnenen Messwerts.A vibration sensor in the manner of a magnetoelastic sensor is shown, which has permanent magnets. The vibration sensor further includes a capacitor which stores energy induced in the receiving coils. The capacitor feeds a measurement and the transmission of a measured value obtained with sufficient charge.
Description
Die Erfindung betrifft einen Schwingungssensor zur energieautarken Detektion von Schwingungen in einem ferromagnetisches Material umfassenden Messobjekt. The invention relates to a vibration sensor for energy-autonomous detection of vibrations in a measuring object comprising ferromagnetic material.
Die Überwachung von Schwingungen in Systemen wie Getrieben, Motoren oder auch Bauwerken wie Brücken dient dazu, belastungsbedingte Schäden frühzeitig zu erkennen. Nahezu immer ist es vorteilhaft, wenn ein Schwingungssensor seine Signale drahtlos übermittelt, da dann keine Kabelverbindungen nach außen nötig sind. Schwingungssensoren benötigen aber Energie, die ohne Verkabelung nicht langfristig zur Verfügung gestellt werden kann. The monitoring of vibrations in systems such as gearboxes, motors or even structures such as bridges serves to detect damage caused by stress at an early stage. Almost always it is advantageous if a vibration sensor transmits its signals wirelessly, because then no cable connections are necessary to the outside. However, vibration sensors require energy that can not be provided long-term without cabling.
Es ist Aufgabe der vorliegenden Erfindung, einen energieautarken Schwingungssensor anzugeben, der Signale drahtlos übermittelt. It is an object of the present invention to provide a self-powered vibration sensor that transmits signals wirelessly.
Diese Aufgabe wird durch einen Schwingungssensor mit den Merkmalen von Anspruch 1 gelöst. Die Unteransprüche betreffen vorteilhafte Ausgestaltungen des Schwingungssensors. This object is achieved by a vibration sensor having the features of claim 1. The subclaims relate to advantageous embodiments of the vibration sensor.
Der erfindungsgemäße Schwingungssensor zur Detektion von Schwingungen in einem ferromagnetisches Material umfassenden Messobjekt umfasst einen Permanentmagnet zur Erzeugung eines Magnetfelds, eine Empfangsspule, einen mit der Empfangsspule elektrisch verbundenen Kondensator und eine mit dem Kondensator verbundene Auswerte- und Sendeeinrichtung auf. Die Auswerte- und Sendeeinrichtung ist ausgestaltet, die für das Senden nötige Energie dem Kondensator zu entnehmen und einen Messwert genau dann zu senden, wenn der Kondensator einen festlegbaren Ladezustand erreicht. The vibration sensor according to the invention for detecting vibrations in a measuring object comprising ferromagnetic material comprises a permanent magnet for generating a magnetic field, a receiving coil, a capacitor electrically connected to the receiving coil and an evaluation and transmitting device connected to the capacitor. The evaluation and transmission device is designed to take the energy required for the transmission of the capacitor and to send a measured value exactly when the capacitor reaches a definable state of charge.
Vorteilhaft wird dadurch ein energieautarker Schwingungssensor geschaffen, bei dem die Häufigkeit von Messsignalen direkt von der Häufigkeit von Schwingungen zusammen mit deren jeweiliger Stärke, also Energie, abhängt. Advantageously, this creates an energy-independent vibration sensor in which the frequency of measurement signals depends directly on the frequency of vibrations together with their respective strength, ie energy.
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Einrichtung gehen aus den von Anspruch 1 abhängigen Ansprüchen hervor. Dabei kann die Ausführungsform nach Anspruch 1 mit den Merkmalen eines der Unteransprüche oder vorzugsweise auch mit denen aus mehreren Unteransprüchen kombiniert werden. Demgemäß können für den Stromwandler noch zusätzlich folgende Merkmale vorgesehen werden:
- – Der Schwingungssensor kann mehrere Empfangsspulen aufweisen. Dadurch wird mehr Energie aufgenommen und somit die Häufigkeit von Messsignalen gesteigert.
- – Permanentmagnet, Empfangsspule und Kondensator können zusammen ein Sensorelement bilden und der Schwingungssensor mehrere Sensorelemente umfasst, deren Kondensatoren zusammen mit der Auswerte- und Sendeeinrichtung verbunden sind. Hierdurch wird ebenfalls die Energieaufnahme erhöht und somit die Empfindlichkeit des Sensors.
- - The vibration sensor may have multiple receiving coils. As a result, more energy is absorbed, thus increasing the frequency of measurement signals.
- - Permanent magnet, receiving coil and capacitor can together form a sensor element and the vibration sensor comprises a plurality of sensor elements, the capacitors are connected together with the evaluation and transmitting device. This also increases the energy consumption and thus the sensitivity of the sensor.
Ein bevorzugtes, jedoch keinesfalls einschränkendes Ausführungsbeispiel für die Erfindung wird nunmehr anhand der einzigen Figur der Zeichnung näher erläutert. Dabei sind die Merkmale schematisiert dargestellt. A preferred, but by no means limiting embodiment of the invention will now be described with reference to the single figure of the drawing. The features are shown schematically.
Die Figur zeigt einen Schwingungssensor
Die Empfangsspulen
Die Sendespule
Der Schwingungssensor
Typischerweise sind magnetoelastische Sensoren neben den Empfangsspulen
Im vorliegenden Ausführungsbeispiel wird im Kondensator
Sodann wird die Empfangsspule und auch die Auswerte- und Sendeeinheit
In einer einfacheren Variante des Schwingungssensors
In einer weiteren Variante des Schwingungssensors
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015214353.8A DE102015214353A1 (en) | 2015-07-29 | 2015-07-29 | Energy-independent vibration sensor |
PCT/EP2016/065689 WO2017016811A1 (en) | 2015-07-29 | 2016-07-04 | Energy-autonomous vibration sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015214353.8A DE102015214353A1 (en) | 2015-07-29 | 2015-07-29 | Energy-independent vibration sensor |
Publications (1)
Publication Number | Publication Date |
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DE102015214353A1 true DE102015214353A1 (en) | 2017-02-02 |
Family
ID=56507575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102015214353.8A Withdrawn DE102015214353A1 (en) | 2015-07-29 | 2015-07-29 | Energy-independent vibration sensor |
Country Status (2)
Country | Link |
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DE (1) | DE102015214353A1 (en) |
WO (1) | WO2017016811A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10025561A1 (en) * | 2000-05-24 | 2001-12-06 | Siemens Ag | Self-sufficient high-frequency transmitter |
US20040089072A1 (en) * | 2002-11-08 | 2004-05-13 | Kim Yoon Young | Methods and apparatus for measuring flexural wave and/or flexural vibration using a magnetostrictive sensor |
DE102012212028A1 (en) * | 2012-07-10 | 2014-01-16 | Albert-Ludwigs-Universität Freiburg | Electromagnetic energy converter for producing energy in generator, has to-be-monitored ferromagnetic portion to change reluctance in generated magnetic field based on distance between ferromagnetic portion and permanent magnet |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4338823A (en) * | 1980-08-29 | 1982-07-13 | Aisin Seiki Company, Ltd. | Vibration sensor |
US7256505B2 (en) * | 2003-03-05 | 2007-08-14 | Microstrain, Inc. | Shaft mounted energy harvesting for wireless sensor operation and data transmission |
CN202018334U (en) * | 2011-04-19 | 2011-10-26 | 金守保 | Electromagnetic type mechanical vibration sensor |
-
2015
- 2015-07-29 DE DE102015214353.8A patent/DE102015214353A1/en not_active Withdrawn
-
2016
- 2016-07-04 WO PCT/EP2016/065689 patent/WO2017016811A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10025561A1 (en) * | 2000-05-24 | 2001-12-06 | Siemens Ag | Self-sufficient high-frequency transmitter |
US20040089072A1 (en) * | 2002-11-08 | 2004-05-13 | Kim Yoon Young | Methods and apparatus for measuring flexural wave and/or flexural vibration using a magnetostrictive sensor |
DE102012212028A1 (en) * | 2012-07-10 | 2014-01-16 | Albert-Ludwigs-Universität Freiburg | Electromagnetic energy converter for producing energy in generator, has to-be-monitored ferromagnetic portion to change reluctance in generated magnetic field based on distance between ferromagnetic portion and permanent magnet |
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WO2017016811A1 (en) | 2017-02-02 |
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Legal Events
Date | Code | Title | Description |
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R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |