EP4031840A1 - Sensornetzwerkanordnung - Google Patents
SensornetzwerkanordnungInfo
- Publication number
- EP4031840A1 EP4031840A1 EP19779769.9A EP19779769A EP4031840A1 EP 4031840 A1 EP4031840 A1 EP 4031840A1 EP 19779769 A EP19779769 A EP 19779769A EP 4031840 A1 EP4031840 A1 EP 4031840A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- data
- radio
- data interface
- sensor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011156 evaluation Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Definitions
- the invention relates to a sensor network arrangement comprising: at least one sensor device with a sensor module for detecting a physical variable and for providing a corresponding sensor signal, an evaluation unit for evaluating the sensor signal and for providing corresponding sensor data, and a first radio data interface for wireless transmission of the sensor data, and a base station with a second radio data interface for receiving the sensor data transmitted by the first radio data interface, a first data memory for storing the received sensor data, and at least one readout
- the at least one sensor device of the sensor network arrangements can be used, for example, to detect the rotational movement of a machine shaft and / or to detect the flow of a gas or liquid line.
- any physical variable can be recorded by the at least one sensor device, wherein the recorded sensor data can be transmitted from the at least one sensor device to the base station via the radio data interfaces, and the base station is designed to store the received sensor data in the first data memory .
- the read-out data interface of the base station creates a central one Access point via which the stored sensor data of the at least one sensor device can be read out at any time by an external readout device.
- a sensor network arrangement is known, for example, from US 2007/0210916 A1 or US 2007/0281758 A1.
- the disclosed sensor network arrangements in particular the
- Data interfaces of the sensor device and the base station are designed in such a way that the sensor data transmission takes place periodically, that is to say at predefined transmission times in each case.
- an external power supply for both the base station and the at least one sensor device is generally required, which ensures that both the base station and the at least one sensor device are switched on at the respective transmission times, and that the radio
- the data interfaces are ready for use at the respective transmission times.
- the base station is each connected to an external power supply, and the sensor devices each have a battery. Since the disclosed sensor devices consequently require a battery replacement at regular intervals, the disclosed sensor devices cannot be easily mounted at measuring points that are difficult to access, such as, for example, within a machine / system.
- the at least one sensor device has at least one energy generator, by means of which electrical energy can be generated for the operation of the sensor device.
- the electrical energy generated by the at least one energy generator is sufficient to at least temporarily cover the entire energy requirement required for operating the sensor device, so that the sensor device manages without an external energy supply.
- the energy generator is designed in such a way that electrical energy can be generated at least during operation of the machine / system to be monitored by the sensor device.
- the energy generator is typically designed to convert mechanical, magnetic and / or electromagnetic energy into electrical energy.
- the energy generator can be designed in such a way that the rotational movement of the machine shaft to be detected can be used to generate an alternating magnetic field by means of which electrical energy can be generated in the sensor device.
- the sensor device according to the invention therefore, neither an external cable connection has to be provided, nor does the sensor device have to be mounted in an easily accessible manner.
- the sensor network arrangement according to the invention thus enables simple and thus inexpensive installation of the at least one sensor device even at measuring points that are difficult to access.
- the sensor device detects the sensor data and tries to use them via the to transmit the first radio data interface to the base station. Since the transmission times cannot be foreseen here, the second radio data interface of the base station is designed according to the invention to receive sensor data from the first radio data interface of the at least one sensor device at any times. This means that the second radio data interface is essentially continuously in a so-called "receive mode" in which the second radio data interface waits for a sensor data transmission from the first radio data interface be to continuously receive radio signals in the receive mode and to analyze them with regard to sensor data potentially contained in the radio signal.
- a read-out device is to be understood, for example, as a mobile / portable read-out device that can be temporarily connected to the base station if necessary in order to read out the stored sensor data.
- a read-out device is also to be understood explicitly as a computer system that is connected to the base station via a permanent data connection.
- the term “read out” is to be understood here on the one hand to mean reading out the sensor data from the base station by the read-out device, but on the other hand is also explicitly a to understand active transmission of the sensor data from the base station to the readout device.
- the at least one sensor device has a Wiegand sensor module, by means of which electrical energy can be generated for the operation of the sensor device.
- the Wiegand module consequently forms an energy generator according to the invention.
- the Wiegand sensor module comprises a so-called Wiegand wire, also known as a pulse wire, and a coil arrangement that radially surrounds the Wiegand wire.
- the direction of magnetization of the Wiegand wire suddenly reverses under the action of an excitation magnetic field as soon as a specific trigger field strength is exceeded. As a result, a short voltage pulse with a defined electrical energy is generated in the coil arrangement.
- the Wiegand sensor module typically has a single pulse wire, but can also have a plurality of pulse wires through which a greater total electrical energy can be generated.
- the excitation magnetic field is typically generated by permanent magnets which are arranged on a movable part of the machine / system to be monitored, for example on a rotatable machine shaft.
- the frequency of the energy / voltage pulses generated in the Wiegand sensor module is directly proportional to the alternation frequency of the exciter magnetic field and thus to the speed of movement of the movable machine / system part, for example directly proportional to the Speed of rotation of the machine shaft.
- the Wiegand sensor module can thus, on the one hand, generate electrical energy for operating the sensor device and, on the other hand, simultaneously detect the movement of a movable machine / system part. This creates an inexpensive and reliable sensor network arrangement.
- the first radio data interface of the sensor device advantageously has an energy converter unit, by means of which electrical energy can be generated for the operation of the sensor device.
- the energy converter unit consequently forms an energy generator according to the invention.
- the energy converter unit is designed to convert the energy from incoming electromagnetic radiation into electrical energy for the operation of the sensor device.
- the electrical energy that can be generated by the first radio data interface is at least sufficient for the proper operation of the first radio data interface itself, so that no electrical energy is provided from other components of the sensor device to the first radio data interface for the operation of the first radio data interface got to.
- the first radio data interface can generate more electrical energy than is necessary for operating the first radio data interface itself, so that the first radio data interface provides electrical energy for operating other components of the sensor device, for example for operating the evaluation unit, can be generated. This creates a particularly reliable sensor network arrangement.
- the first radio data interface does not generate its own radio signals, but rather reflects an incoming carrier radio signal and modulates it - usually by means of counter-phase field weakening. In comparison to the active generation of radio signals, significantly less electrical energy is required for this.
- the first radio data interface can for example be based on the known interface standards / specifications “Passive Wi-Fi”, “LoRa Backscatter”, or “RFID”. Modulation of the carrier radio signal in the first radio data interface is particularly preferred even electrical energy can be generated, the electrical energy generated typically being at least sufficient to operate the first radio data interface itself, so that no external energy supply is required to operate the radio data interface. This creates a particularly energy-efficient radio data interface that can operate without an external energy supply or with only relatively little external
- the base station preferably sends - essentially continuously - a defined carrier radio signal that is transmitted by the first radio
- the data interface can be modulated.
- the carrier radio signal is preferably adapted to the design of the first radio data interface and to the spatial conditions, for example the distance between the at least one sensor device and the base station and / or any obstacles that may be present between the at least one sensor device and the base station.
- the carrier radio signal can also be designed for particularly efficient energy generation in the first radio data interface. This thus enables particularly energy-efficient and reliable sensor data transmission between the at least one sensor device and the base station.
- At least one separate radio transmitter is advantageously provided which transmits a defined carrier radio signal that can be modulated by the first radio data interface.
- the separate radio transmitter enables particularly efficient propagation of the carrier radio signal and thus a particularly reliable transmission of sensor data, especially in the case of unfavorable spatial conditions.
- the at least one sensor device has a second data memory for storing the sensor data. The second data memory thus enables the sensor data to be stored in the sensor device, which enables the sensor data to be transmitted again in the event of a faulty sensor data transmission - for example due to an interruption in the energy supply to the sensor device before or during the transmission process.
- the data memory is preferably designed as a non-volatile data memory - for example as a ferroelectric memory - so that the sensor data can still be read out even after an interruption in the power supply.
- the base station has at least one wireless radio readout data interface, so that neither a cable connection nor direct access to the base station has to be provided for reading out the sensor data stored in the base station. This creates a versatile and variably replaceable sensor network arrangement.
- the base station preferably has several different readout data interfaces, so that the base station can be read out by different readout devices. This creates a particularly versatile and variably replaceable sensor network arrangement.
- the figure shows a sensor network arrangement 10 with three energy self-sufficient sensor devices 12a, 12b, 12c, which are arranged at three different measuring points of an industrial plant (not shown in detail), a base station 14, and a radio transmitter 16.
- the radio transmitter 16 transmits a defined carrier radio signal T in the present exemplary embodiment.
- the first sensor device 12a is, for example, a first rotary encoder for detecting the rotational movement of a machine shaft 18, the second sensor device 12b is, for example, a fluid flow measuring arrangement for detecting the fluid flow in a fluid line 20, and the third sensor device 12c is, for example, a second rotary encoder for detecting the rotary movement of a rotary slide valve 22.
- Each sensor device 12 comprises a sensor module 24, which in the present exemplary embodiment is in each case a Wiegand sensor module through which an alternating excitation magnetic field can be detected.
- the sensor module 24 each provides a sensor signal that is proportional to the alternation frequency of the detected excitation magnetic field.
- electrical energy for the operation of the respective sensor device 12 can also be generated by the sensor module 24 embodied as a Wiegand module.
- each sensor device 12 has an energy store 26 in which the electrical energy generated by the sensor module 24 is temporarily stored.
- Each sensor device 12 further comprises an evaluation unit 28, which evaluates the typically analog sensor signal and provides corresponding digital sensor data.
- the evaluation unit 28 is fed exclusively by the electrical energy stored in the energy store 26.
- each sensor device 12 comprises a non-volatile second data memory 30 which is exclusively used the electrical energy stored in the energy store 26 is fed and in which the sensor data provided by the evaluation unit 28 are stored.
- Each sensor device 12 further comprises a first radio
- the first radio data interface 32 for transmitting the detected sensor data to the base station 14.
- the first radio data interface 32 works in the present embodiment according to the principle of modulated backscattering, the incident carrier radio signal T being modulated by the first radio data interface 32 in such a way that a modulated carrier radio signal Tm is backscattered.
- the first radio data interface 32 operates according to the known "LoRa Backscatter" specification
- the first radio data interface 32 has an energy converter unit 34, by means of which the energy of the incident carrier radio signal T can be converted into electrical energy for the operation of the sensor device.
- the electrical energy generated by the energy converter unit 34 is generally at least sufficient for the operation of the first radio data interface 32.
- the energy converter unit 34 generates more electrical energy than is required for operating the first radio data interface 32, the excess electrical energy being fed into the energy store 26.
- Each sensor device 12 of the sensor network arrangement 10 according to the invention is completely self-sufficient in terms of energy, so the sensor device 12 manages in each case without an external energy supply.
- all of the electrical energy required in each case for the operation of the sensor device 12 is completely supplied by the Wiegand sensor module 24 and by the energy converter unit 34 of the first radio data interface 32 is generated, wherein the generated electrical energy can be temporarily stored in the energy store 26.
- the base station 14 comprises a radio transmitter unit 36 through which the carrier radio signal T, which can be modulated by the first radio data interface 32 of the sensor device, is also transmitted.
- the base station 14 further comprises a second radio data interface 38 for receiving the sensor data transmitted by the first radio data interface 32 of the sensor device 12.
- the second radio data interface 38 receives the backscattered modulated carrier radio signal Tm from the first radio data interface 32 and evaluates this accordingly from the "LoRa backscatter" specification used in the present exemplary embodiment in order to add the sensor data transmitted by the sensor device 12
- the second radio data interface 38 is essentially continuously in a receiving mode in which incoming radio signals are received and analyzed, provided by the first radio data interface 32 of the sensor device 12 at any - not predefined - transmission time modulated carrier radio signal Tm is consequently reliably received and correspondingly evaluated.
- the second radio data interface 38 is consequently designed to receive sensor data from the first radio data interface 32 of the sensor device 12 at any transmission times.
- the base station 14 further comprises a — preferably non-volatile — first data memory 40, in which the sensor data received from the second radio data interface 38 are stored.
- the stored sensor data is used also stored in each case from which of the three sensor devices 12 the respective sensor data were received, so that all stored sensor data can be clearly assigned to a special sensor device 12.
- the base station 14 further comprises two readout data interfaces 42, 44, the first readout data interface 42 being wired and the second readout data interface 44 being a wireless radio readout data interface.
- the first read-out data interface 42 provides a data connection with a server computer system 46 via which the sensor data stored in the first data memory 40 can be read out by the server computer system 46 at any time.
- a radio data connection with a mobile readout device 48 can be provided via the second readout data interface 44, via which the sensor data stored in the first data memory 40 can be read out by the readout device 48 and / or transmitted to the readout device 48 if necessary.
- sensor network arrangement 12 sensor device 14 base station 16 radio transmitter 18 machine shaft 20 fluid line 22 rotary slide valve 24 sensor module 26 energy storage 28 evaluation unit 30 second data storage 32 first radio data interface 34 energy converter unit 36 radio transmitter unit 38 second radio data interface 40 first data storage 42 first read-out data interface 44 second readout data interface 46 server computer system 48 mobile readout device T carrier radio signal Tm modulated carrier radio signal
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2019/075141 WO2021052585A1 (de) | 2019-09-19 | 2019-09-19 | Sensornetzwerkanordnung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4031840A1 true EP4031840A1 (de) | 2022-07-27 |
Family
ID=68104564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19779769.9A Pending EP4031840A1 (de) | 2019-09-19 | 2019-09-19 | Sensornetzwerkanordnung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220417327A1 (de) |
EP (1) | EP4031840A1 (de) |
JP (1) | JP2022548873A (de) |
CN (1) | CN114424033A (de) |
WO (1) | WO2021052585A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118043747A (zh) | 2021-09-06 | 2024-05-14 | 弗瑞柏私人有限公司 | 传感器网络系统 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6191687B1 (en) * | 1998-09-24 | 2001-02-20 | Hid Corporation | Wiegand effect energy generator |
US7256505B2 (en) * | 2003-03-05 | 2007-08-14 | Microstrain, Inc. | Shaft mounted energy harvesting for wireless sensor operation and data transmission |
DE102004007106B4 (de) * | 2004-02-13 | 2011-04-07 | Atmel Automotive Gmbh | Schaltungsanordnung, insbesondere zur Verwendung in RF-Transpondern oder Remote Sensoren |
JP4552670B2 (ja) | 2005-01-31 | 2010-09-29 | 株式会社日立製作所 | センサノード、基地局、及びセンサネットワークシステム |
DE102005059759A1 (de) * | 2005-12-14 | 2007-06-28 | Siemens Ag | Energiegenerator als Alarmsensor |
JP4719034B2 (ja) | 2006-03-07 | 2011-07-06 | 株式会社日立製作所 | センサネットシステム、基地局及びセンシングデータの中継方法 |
DE102006050040B4 (de) * | 2006-10-24 | 2017-06-29 | Robert Bosch Gmbh | Energieautarker Druck- oder Berührungssensor |
JP6025571B2 (ja) * | 2013-01-04 | 2016-11-16 | 新光電気工業株式会社 | センサモジュール及びセンサシステム |
DE102013003190A1 (de) * | 2013-02-26 | 2014-08-28 | Hengstler Gmbh | Batterieloser Signalgeber mit Wiegand-Sensor für Gas- oder Wasserzähler |
CN103441560B (zh) * | 2013-06-24 | 2015-08-12 | 浙江大学 | 基于压电换能的无线网络传感器通信电源 |
CN103344262B (zh) * | 2013-06-29 | 2016-09-28 | 宜昌盛开特电气有限公司 | 基于韦根效应的旋转自供电磁电式多圈绝对值编码器 |
JP2015186090A (ja) * | 2014-03-25 | 2015-10-22 | パナソニックIpマネジメント株式会社 | 通信システム及びルート構築方法 |
CN203857982U (zh) * | 2014-05-30 | 2014-10-01 | 张宝安 | 管网数据检测装置 |
JP6676986B2 (ja) * | 2016-01-29 | 2020-04-08 | セイコーエプソン株式会社 | 通信システム |
CN105704251A (zh) * | 2016-04-25 | 2016-06-22 | 南阳师范学院 | 基于风致振动压电能量自供能的矿井wsn安全监测系统 |
CN106482789A (zh) * | 2016-11-07 | 2017-03-08 | 广东技术师范学院 | 基于单片机的无线环境监测系统及方法 |
JP2019149090A (ja) * | 2018-02-28 | 2019-09-05 | 国立大学法人東京工業大学 | 無線センサおよびセンサネットワークシステム |
JP7005390B2 (ja) * | 2018-03-06 | 2022-01-21 | シャープ株式会社 | 設定端末、無線テレメータシステム、及び設定方法 |
CN208433748U (zh) * | 2018-06-22 | 2019-01-25 | 重庆金山科技(集团)有限公司 | 储能元件能量泄放与回收电路、高压电源、能量发生器 |
CN108551163B (zh) * | 2018-06-22 | 2024-04-05 | 重庆金山科技(集团)有限公司 | 储能元件能量泄放与回收电路、高压电源、能量发生器及方法 |
-
2019
- 2019-09-19 WO PCT/EP2019/075141 patent/WO2021052585A1/de unknown
- 2019-09-19 CN CN201980100513.0A patent/CN114424033A/zh active Pending
- 2019-09-19 JP JP2022516383A patent/JP2022548873A/ja active Pending
- 2019-09-19 US US17/761,202 patent/US20220417327A1/en active Pending
- 2019-09-19 EP EP19779769.9A patent/EP4031840A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
US20220417327A1 (en) | 2022-12-29 |
JP2022548873A (ja) | 2022-11-22 |
CN114424033A (zh) | 2022-04-29 |
WO2021052585A1 (de) | 2021-03-25 |
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