EP3830804A1 - Funksensorknoten - Google Patents
FunksensorknotenInfo
- Publication number
- EP3830804A1 EP3830804A1 EP18785850.1A EP18785850A EP3830804A1 EP 3830804 A1 EP3830804 A1 EP 3830804A1 EP 18785850 A EP18785850 A EP 18785850A EP 3830804 A1 EP3830804 A1 EP 3830804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- radio
- sensor node
- unit
- sensor
- 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.)
- Granted
Links
- 238000003306 harvesting Methods 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000004146 energy storage Methods 0.000 claims description 14
- 238000012935 Averaging Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011088 calibration curve Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C13/00—Arrangements for influencing the relationship between signals at input and output, e.g. differentiating, delaying
Definitions
- the invention relates to a radio sensor node.
- a radio sensor node transmits measurement data acquired by means of a sensor to one wirelessly by means of radio waves
- Radio sensor nodes are often heavy
- a radio sensor node is usually special
- the invention has for its object to provide an improved radio sensor node and a method for operating it, in particular for use in a
- the object is achieved according to the invention by a radio sensor node with the features of claim 1 and a method with the features of claim 14.
- a radio sensor node according to the invention comprises one
- Sensor unit for acquiring a measured variable and outputting an analog electrical sensor signal
- an energy harvesting unit for harvesting energy from the sensor signal
- the sensor signal can be fed alternately to the energy harvesting unit and the signal processing unit.
- the invention therefore provides for the electrical sensor signal of the sensor unit of a radio sensor node
- the radio sensor node assigns an energy harvesting unit
- the invention takes advantage of the fact that a radio sensor node generally does not continuously process and send a sensor signal as a radio signal, but rather the majority of the time in one
- Sleep mode is used according to the invention to harvest energy from the sensor signal.
- the energy harvesting unit can be any type of energy harvesting unit.
- the energy harvesting unit can also be used as
- Energy harvesting unit is used to obtain energy from the sensor signal. These are in particular:
- Signal processing unit an averaging circuit for
- Radio sensor node omitted and instead as
- the transmission signal occurs to a user of the radio sensor node.
- a calibration curve is measured in a test field of the manufacturer of the radio sensor node, for example, which represents the transmission signal as a function of the measured variable and is made available to a user of the radio sensor node.
- the signal processing unit as
- Transmission signal generates an effective value of the sensor signal.
- radio sensor node has sufficient energy to calculate the effective value due to energy harvesting.
- the radio sensor node has a signal input to which the sensor signal is fed, and a switchover logic through which the
- Signal input is alternately connectable to the energy harvesting unit and the signal processing unit.
- Radio sensor node has led out contacts. This makes contacting the signal input from the outside
- one of the contacts can be used to open the contact outside of the radio sensor node
- the radio signals of the radio unit are advantageously hardly attenuated by the sensor node housing.
- the radio unit has an antenna, for example a ring antenna with one or more windings, and is designed to alternately transmit the radio signal with the antenna and from one in an environment of the radio sensor node
- Radio sensor node existing magnetic field.
- the antenna of the radio sensor node not only sends radio signals, but also for harvesting energy from a magnetic field and / or for detecting a magnetic field strength
- the antenna is also advantageous Power supply of the radio sensor node and / or as
- the radio sensor node can be an electromagnetic one connected to the electrically conductive surface
- This embodiment of the invention uses an electrically conductive surface on which the radio sensor node is arranged for potential connection of the radio sensor node and an electromagnetic shielding of the radio sensor node.
- the radio sensor node has an energy storage unit for storing energy.
- the energy storage unit has
- the accumulator is, for example, only charged when the
- Supercapacitor is charged to a nominal voltage.
- the battery only takes place after the supercapacitor has been charged to a nominal voltage. This is achieved by means of a decoupling circuit. If the accumulator becomes defective after a few years of operation, it does not build up any voltage more on. The decoupling circuit then avoids discharge of the supercapacitor by the defective one
- Radio sensor nodes can process significantly more measurement and arithmetic tasks than with the sole supply from the supercapacitor.
- the measurement variable is accordingly detected with the sensor unit and that
- Sensor signal output the sensor signal is alternately fed to the energy harvesting unit and the signal processing unit, with the signal processing unit
- Transmission signal generated from the sensor signal is sent as a radio signal with the radio unit, and energy is harvested from the sensor signal with the energy harvesting unit.
- 1 shows a block diagram of a radio sensor node
- FIG. 2 shows a circuit diagram of a rectifier circuit and an averaging circuit for generating a
- FIG. 3 shows a circuit diagram of an energy storage unit. Corresponding parts are shown in the figures
- FIG. 1 shows a block diagram of an exemplary embodiment of a radio sensor node 1 according to the invention
- Radio sensor node 1 comprises a sensor node housing 3, a sensor unit 5, a signal input 7, a switching logic 9, a signal processing unit 11, a
- Energy harvesting unit 13 with an energy storage unit 15, a radio unit 17 and an electromagnetic one
- Sensor unit 5 has, for example, a temperature sensor for detecting a temperature as a measured variable, but can also have a sensor for detecting another measured variable.
- the sensor signal S is one of the
- Sensor unit 5 generated electrical voltage, for example a voltage in the single-digit volt range.
- the switching logic 9 connects the signal input 7
- MOSFET metal-oxide-semiconductor field effect transistors
- the signal processing unit 11 generates from the
- the signal processing unit 11 generates as
- Transmission signal T an average of the rectified sensor signal S, see Figure 2.
- FIG. 2 shows an example of a circuit diagram of a rectifier circuit 21 and an averaging circuit 23 for generating the transmission signal T as an average of the rectified sensor signal S.
- Rectifier circuit 21 is designed as a bridge rectifier circuit formed by four diodes 25.
- the averaging circuit 23 is connected downstream of the rectifier circuit 21 and has an inductance 27, one
- Averaging capacitor 29 connected in parallel
- Signal input 7 is protected from overvoltages by a voltage limiting unit 33 formed by a varistor.
- the voltage limiting unit 33 is designed for an incoming, decaying over 5 ms
- the transmission signal T is a voltage applied to the parallel connection of the averaging capacitor 29 and the averaging resistor 31.
- a calibration curve is measured in a test field of the manufacturer of the radio sensor node 1, which represents the transmission signal T as a transmission function of the measured variable and is made available to a user of the radio sensor node 1.
- a time characteristic typical for the measurement signal is selected for the determination of the transfer function in the test field, which roughly corresponds to the expected measurement variable on the system.
- rectified sensor signal S requires no complex evaluation of the sensor signal S in the radio sensor node 1 and is therefore particularly energy-saving. If sufficient harvested energy is available, the
- signal processing unit 11 is more complex
- Signal processing unit 11 have an integrated circuit which as a transmission signal T one
- the effective value is formed over a time period of approximately 100 ms with a sampling frequency of more than 3 kHz.
- the effective value is formed over a time period of approximately 100 ms with a sampling frequency of more than 3 kHz.
- Measured value V elaboration several signals include, contain a Messwertspeieher and include a more complex processing.
- the energy harvesting unit 13 is designed to harvest energy from the sensor signal S, which is used to supply energy to the radio sensor node 1.
- Energy harvesting unit 13 has an energy storage unit 15, which is designed to store energy when the harvested energy is not currently required to supply energy to the radio sensor node 1.
- FIG. 3 shows a circuit diagram of an exemplary embodiment of the energy storage unit 15, it being assumed that the energy storage unit 15 is connected to the signal input 7 via the switchover logic 9 and, as in FIG. 2, the switchover logic 9 is not shown.
- the switchover logic 9 is not shown.
- Energy storage unit 15 of this exemplary embodiment has a supercapacitor 35, an accumulator 37
- Overflow unit 39 with an integrated overload protection and a blocking diode 41 and is via a
- Rectifier circuit 21 connected to the signal input 7, wherein the rectifier circuit 21 can match the rectifier circuit 21 shown in FIG. 2 or can be implemented separately.
- the supercapacitor 35 and the accumulator 37 are decoupled by the overflow unit 39, but in principle are connected in parallel to one another.
- Overflow unit 39 directs excess energy into the
- the radio unit 17 has an antenna 43 with which the transmission signal T is transmitted as a radio signal.
- the antenna 43 is designed as a ring antenna with one or more turns.
- the radio unit 17 is preferably also designed to alternately transmit the radio signal with the antenna 43 and to inductively harvest energy and / or a magnetic field strength in one from an existing magnetic field in an environment of the radio sensor node 1
- the electromagnetic shield 19 is as one
- Sensor node housing 3 runs around the electrical and electronic components of the radio sensor node 1.
- the signal input 7 has contacts 44, 45 led out of the sensor node housing 3, via which the
- Signal input 7 can be contacted from the outside.
- Contacts 44, 45 can be an external one, for example
- Sensor unit 5 are connected to the signal input 7 in order to supply the signal input 7 with a sensor signal S output by the external sensor unit 5.
- a lead-out contact 45 and the electromagnetic shield 19 are led out of the sensor node housing 3
- Ground connection 47 connected.
- the ground connection 47 is electrical with an electrically conductive surface 49
- the energy harvesting unit 13 can be removed from the
- Sensor node housing 3 lead out additional contacts 51, 52 harvest energy.
- the sensor node housing 3 is in a plastic
- the radio sensor node 1 is, for example, in a
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2018/076156 WO2020064101A1 (de) | 2018-09-26 | 2018-09-26 | Funksensorknoten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3830804A1 true EP3830804A1 (de) | 2021-06-09 |
EP3830804B1 EP3830804B1 (de) | 2023-08-23 |
Family
ID=63840783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18785850.1A Active EP3830804B1 (de) | 2018-09-26 | 2018-09-26 | Funksensorknoten |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3830804B1 (de) |
ES (1) | ES2963492T3 (de) |
WO (1) | WO2020064101A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111817369B (zh) * | 2020-06-19 | 2022-12-27 | 北京交通大学 | 一种面向轨道交通车辆的振动能量收集和管理系统及方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7692411B2 (en) * | 2006-01-05 | 2010-04-06 | Tpl, Inc. | System for energy harvesting and/or generation, storage, and delivery |
DE102008044902A1 (de) * | 2008-08-29 | 2010-03-04 | Siemens Aktiengesellschaft | Vorrichtung und Verfahren zur Erzeugung, Speicherung und Übertragung von elektrischer Energie |
US20100264906A1 (en) * | 2009-04-16 | 2010-10-21 | Panoramic Power Ltd. | Apparatus and Methods Thereof for Power Consumption Measurement at Circuit Breaker Points |
-
2018
- 2018-09-26 EP EP18785850.1A patent/EP3830804B1/de active Active
- 2018-09-26 ES ES18785850T patent/ES2963492T3/es active Active
- 2018-09-26 WO PCT/EP2018/076156 patent/WO2020064101A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020064101A1 (de) | 2020-04-02 |
EP3830804B1 (de) | 2023-08-23 |
ES2963492T3 (es) | 2024-03-27 |
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