WO2024068466A1 - Netzwerkgerät und system mit bidirektionaler energieversorgung - Google Patents
Netzwerkgerät und system mit bidirektionaler energieversorgung Download PDFInfo
- Publication number
- WO2024068466A1 WO2024068466A1 PCT/EP2023/076227 EP2023076227W WO2024068466A1 WO 2024068466 A1 WO2024068466 A1 WO 2024068466A1 EP 2023076227 W EP2023076227 W EP 2023076227W WO 2024068466 A1 WO2024068466 A1 WO 2024068466A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- network device
- bus
- bus line
- designed
- electrical energy
- 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.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40045—Details regarding the feeding of energy to the node from the bus
Definitions
- the invention relates generally to energy and data transmission in a bus system and in particular to a network device for connection to a bus line, as well as a system with several such network devices.
- bus systems are used in many areas to transmit data between multiple participants.
- the bus cables have a different number of wires.
- Particularly cost-effective and easy-to-use bus systems use a 2-wire cable.
- bus line can include additional lines for power supply for this purpose.
- a power supply via the bus line offers the advantage that there is no need for a separate power supply for the device, for example with a separate power cable and power supply or with a battery.
- PoDL Power over Data Line
- IoT Internet of Things
- SPE Single Pair Ethernet
- capacitors for the high-frequency data signals have low impedance, i.e. are permeable.
- inductances have low impedance, i.e. are permeable, whereas capacitances have a blocking effect. In this way, the data signal and the energy signal can be transmitted over the same 2 lines.
- the invention is based on the object of showing a way in which a power supply of bus participants and/or a power transmission in a bus system can be improved, simplified and/or made more flexible.
- a network device which comprises at least one bus interface for connecting the network device to a bus line, in particular to a two-wire bus line, the bus interface being designed for data transmission and energy transmission, and the network device for this purpose is designed to either take electrical energy from the bus line or feed electrical energy into the bus line, depending on an operating mode of the network device.
- a core aspect of the invention can therefore be seen in providing a network device for connection to a bus line, with which flexible, bidirectional energy transmission is enabled, so that, for example, some participants can feed energy into the bus and other participants can take energy.
- energy can advantageously be provided for a network device even in the configuration case, so that the network device only has to be connected via the bus interface during commissioning, for example, in order to configure the network device.
- the network device advantageously comprises a diplexing connected to the bus interface - Device for frequency-selective signal splitting.
- the network device preferably comprises a circuit for power distribution and a transmitting/receiving device for sending and receiving data, the bus interface being connected via the diplexing device to the circuit for power distribution and to the transmitting/receiving device.
- the diplexing device is designed in particular to transmit electrical energy between the bus line and the circuit for energy distribution, as well as to transmit data signals between the bus line and the transmitting/receiving device, in both directions.
- the network device can advantageously have a power supply device, which can be designed, for example, as a power supply unit for connection to a power grid or as a battery.
- the network device preferably has a normal operating mode and a configuration operating mode, wherein the network device is supplied with electrical energy by the power supply device in the normal operating mode and is designed to feed electrical energy provided by the power supply device into a bus line connected to the bus interface in the normal operating mode, and wherein the network device is designed to take electrical energy for supplying the network device from a bus line connected to the bus interface in the configuration operating mode. Switching between the normal and the configuration operating mode preferably takes place automatically depending on whether electrical energy is provided by the power supply device.
- the network device comprises at least one control unit and one storage unit, wherein the network device is designed to supply at least the control unit and the storage unit with electrical energy in the configuration operating mode, and to provide access to the storage unit via the control unit for a further device that can be connected to the network device via the bus interface.
- Network device in particular a configuration device.
- the control unit and the memory unit can also be formed by a common unit or arranged in a common unit.
- an integrated circuit (IC) can be provided which comprises the control unit and the memory unit.
- the network device can be configured in a particularly simple manner during commissioning by simply connecting the network device to a configuration device via the bus interface, which supplies the network device with electrical energy via the connection cable, so that the control unit and the memory of the network device are functional and configuration parameters can be stored in the memory with the help of the configuration device.
- the configuration operating mode preferably serves as an emergency operating mode, with the network device advantageously being designed to automatically switch to the configuration operating mode if the power supply device fails.
- the network device can advantageously be supplied with electrical energy via the bus or the bus line if its own energy supply device fails.
- the components of the network device involved in the data transmission and/or energy transmission via the bus interface are galvanically isolated from other components of the network device.
- the galvanic isolation can be implemented inductively, capacitively or optoelectronically, for example.
- the circuit for power distribution is preferably designed to record, smooth, limit, rectify, switch and/or regulate voltage and/or current signals.
- the circuit for power distribution can be designed to provide a supply voltage for the control unit and/or the memory. Trouble-free operation of the control unit and/or the Memory is advantageously ensured by voltage regulation and smoothing carried out by the energy distribution circuit.
- the network device advantageously comprises a measuring device for measuring a voltage present on the bus line, the network device being designed to feed electrical energy into the bus line only with the corresponding polarity of the voltage present on the bus line, or depending on the polarity of a voltage to be fed into the bus line to the voltage measured on the bus line.
- the network device can advantageously also have a plurality of bus interfaces, for example at least one first and one second bus interface.
- the network device is advantageously designed to selectively establish or interrupt an electrical connection between the first and the second bus interface.
- a system which comprises at least two network devices described above and a bus line, in particular a two-wire bus line, the network devices being connected to one another via the bus line.
- At least one network device of the at least two network devices draws electrical energy from the bus line, and at least one other network device of the at least two network devices feeds electrical energy into the bus line.
- bus participants whose own power supply has failed, for example, can advantageously be supplied by other bus participants.
- Fig. 1 schematically and simplified the structure of a preferred embodiment of a network device according to the invention
- Fig. 2 shows schematically the basic functionality of PoDL
- Fig. 3 shows schematically and greatly simplified a first preferred exemplary embodiment of a system according to the invention
- Fig. 4 shows schematically and greatly simplified a second preferred exemplary embodiment of a system according to the invention.
- FIG. 1 shows the basic structure of a network device 100, which is used as a bus subscriber and accordingly has a bus interface 110 for connecting to a bus line.
- the bus interface is designed to be connected to the two lines of a two-wire bus line.
- the network device 100 comprises two areas that are galvanically separated from one another by an isolation barrier, which is indicated as a dashed line 200.
- the isolation barrier comprises a transformer 120 for inductive galvanic isolation, as well as a coupler 130, which can be designed for capacitive or optoelectronic galvanic isolation, for example, and can be designed as an optocoupler or as a digital coupler, for example.
- the lower area below the isolation barrier comprises the actual device functionality, where, among other things, a power supply 140 is typically arranged, as well as a host controller 145, which can be designed as a microcontroller, for example, and which is supplied with electrical energy via the power supply 140.
- a power supply 140 is typically arranged, as well as a host controller 145, which can be designed as a microcontroller, for example, and which is supplied with electrical energy via the power supply 140.
- the upper area above the isolation barrier essentially comprises the components of the network device 100 involved in bus communication.
- the galvanic isolation of the two areas achieved by the isolation barrier advantageously serves to avoid mutual interference between the respective components. Be it It is noted that galvanic isolation is an advantageous design, but not an essential one for the functioning of the network device.
- the upper area of the network device 100 is supplied with electrical energy via the transmitter or transformer 120, wherein the power supply 140 is connected to the transformer 120 via a driver circuit 141 for this purpose.
- the network device 100 shown further includes a circuit for power distribution 150, which can record, smooth, limit, switch and regulate voltage and/or current signals and can additionally control energy flows.
- a circuit for power distribution 150 which can record, smooth, limit, switch and regulate voltage and/or current signals and can additionally control energy flows.
- the direct voltage supplied via the transformer 120 and a rectification shown schematically as a diode 121 can be supplied in normal operation as a supply voltage to a control unit 160 and optionally to a storage unit 165, which is connected to the control unit 160 for communication, so that it is correspondingly electrically connected Energy is supplied.
- the control unit 160 can be designed, for example, as a microcontroller.
- the control unit 160 and the storage unit 165 can also be housed in a common component. Voltage regulation and smoothing within the energy distribution circuit 150 advantageously ensures trouble-free operation of the control unit 160.
- control unit 160 can now exchange data with the host controller 145 via the optional isolation barrier, i.e. via the coupler 130, for example using an SPI data interface.
- the actual data flow via the bus system is carried out by the control unit 160 via a transmitting/receiving device 170, for example in the form of a transceiver, which is responsible for processing the data, and via a diplexing unit 180, explained in more detail below, which sends the data which transfers and receives two bus lines.
- the diplexing unit 180 consists of various hardware components and has various tasks. On the one hand, the diplexing unit 180 is designed for frequency separation, whereby the basic functionality of the frequency separation achieved by the diplexing unit 180 The frequency separation is shown below in connection with Fig. 2.
- Fig. 2 shows an example of how simultaneous data and energy transmission is solved in SPE (Single Pair Ethernet), using the PoDL (Power over Data Line) method.
- electrical energy is transmitted to the sink 320 of the subscriber 302 via a DC voltage source 310 of the subscriber 301. Since the data is also transmitted at high frequencies via the two lines, the separation is achieved using a frequency switch.
- the four inductors 331, 332, 333 and 334 shown have high impedance for the data signal at high frequencies, so they act like a barrier here, with the four capacitances 341, 342, 343 and 344 having low impedance, i.e. permeability, for the high-frequency data signal.
- the inductances For the low-frequency DC or AC energy signal, i.e. the supply voltage, the inductances have a low impedance, i.e. they are permeable, whereas the capacitances have a blocking effect. This means that data signals and energy signals can be transmitted over the same 2 lines.
- the energy supply can be separated from the data signals by means of frequency switches, i.e. by means of the diplexing unit 180, for example using inductors and capacitances, which will be explained in more detail below.
- a preferably regulated voltage can also be switched to the bus lines from the circuit for power distribution via the switch 195 and the diplexing unit 180 via the frequency switch.
- the control unit 160 has control over the switch 195, ie the switch 195 is designed as a controllable switch and can be controlled by the control unit 160 via a corresponding control line indicated by dashed lines.
- the control unit 160 preferably only closes the switch 195 if a measurement carried out by the diplexing unit 180 has shown that there is either no voltage or a correctly polarized voltage on the bus line. The result of the measurement is transmitted from the diplexing unit 180 to the control unit 160 via a suitable signal or data line. This is indicated in Fig. 1 by a dashed arrow.
- the voltage can be switched to the bus line by closing the switch 195. It can also advantageously be provided to adapt the polarity of a voltage to be fed into the bus line depending on the voltage measured on the bus line, and in this way to implement polarity reversal protection. For this purpose, a corresponding polarity reversal protection circuit is advantageously provided, which is not shown in FIG.
- the power distribution circuit 150 is further designed for current limitation, so that only a current with a predetermined maximum current intensity can be provided on the bus line.
- the following will consider the case in which the actual device functionality, represented by the host controller 145 in FIG. 1, has failed and/or is not supplied with energy, but the network device 100 is connected via the bus lines. This can be the case, for example, when the device is commissioned using a special bus configuration adapter (not shown). This case can also occur if the network device 100 has a defect, for example, and for this reason no electrical energy can be provided via the power supply 140.
- the diplexing unit 180 can forward the voltage present on the bus to the power distribution circuit 150, for example via a bridge rectification circuit 190.
- the voltage present on the bus i.e. on the bus lines, is advantageously provided by at least one other bus subscriber.
- the bridge rectification circuit 190 advantageously enables current to be drawn regardless of the polarity of the voltage present on the bus lines.
- the power distribution circuit 150 can now advantageously limit, regulate and/or smooth a voltage provided in the manner described by the diplexing unit 180 as required and the correspondingly limited, regulated, and/or forward the smoothed voltage as a supply voltage to the control unit 160 and/or the memory 165, so that the control unit can then communicate via the bus as described above, despite the lack of device voltage from the power supply 140.
- configuration data can be read out of memory 165 even in the event of a defect or written into memory 165 during the configuration phase.
- the network device 100 can include additional components and/or assemblies that are not shown in FIG. 1.
- additional components and/or assemblies that are not shown in FIG. 1.
- optional internal scheduling can be provided
- FIG. 3 shows an example of a system 10 with three bus participants 100-1, 100-2 and 100-3, the bus participants each corresponding to the network device 100 described in connection with FIG. 1.
- the bus participants are connected to a common two-wire bus line 400 via the respective bus interface 110.
- the bus subscriber 100-3 has a defective power supply.
- the invention advantageously enables the bus subscriber 100-3 to be supplied with electrical energy by the other bus subscribers 100-1 and 100-2.
- the bus participants 100-1 and 100-2 feed electrical energy into the bus line 400 as described above, while the bus participant 100-3 takes electrical energy from the bus line 400. This is indicated in FIG. 3 by corresponding arrows.
- only one of the two bus participants 100-1 and 100-2 can provide energy for the bus participant 100-3 or the required energy is provided in unequal parts by the bus participants 100-1 and 100-2. In this way, data communication between the three can be advantageous
- Bus participants 100-1, 100-2 and 100-3 are guaranteed, even if the internal power supply has failed in one of the bus participants.
- a network device 100 is shown in FIG. 1, which only includes one bus interface 110.
- a network device according to the invention can also have several bus interfaces or ports.
- FIG. 4 An exemplary embodiment of a system 20 according to the invention with network devices that have multiple ports is shown schematically in FIG. 4.
- Fig. 4 shows a highly simplified sketch of a connection of three network devices 510, 520 and 530 within a network topology.
- the illustrated network 20 includes, for example, a first, a second and a third network device 510, 520, and 530, each of which is electrically connected to a bus 600.
- the bus 600 shown can advantageously be designed as a two-wire bus and is constructed as an example of a daisy chain topology in FIG.
- each individual network device 510, 520, 530 in the exemplary embodiment in FIG is connected to a first connection port 521 of the second network device 520 and a second connection port 522 of the second network device 520 is connected to a first connection port 531 of the third network device 530.
- further network devices to the left of the first network device 510 and/or to the right of the third network device 530 can be connected to the network 20 according to the network topology used or connected to the bus system 600.
- circuit parts can advantageously be provided in the network devices which are designed to selectively establish or interrupt an electrical connection between the first and second bus interfaces of the respective network device.
- the network devices shown in FIG. 4 advantageously have an analog structure with regard to bidirectional energy transmission, ie the ability to selectively feed electrical energy onto the bus or withdraw electrical energy, as described above in connection with the network device 100 shown in FIG .
- the invention advantageously enables bus participants to be used both as a source and as a sink for electrical energy, i.e. as a transmitter or receiver of energy depending on the operating mode.
- flexible, bidirectional energy transmission is enabled, whereby, for example, some bus participants feed electrical energy into the bus and other bus participants can take electrical energy.
- it can advantageously be provided to provide reverse polarity protection, in particular for bus participants that act as a source of electrical energy, whereby rectification can be provided in particular for bus participants that serve as a sink for electrical energy in order to provide a voltage of predetermined polarity, regardless of the polarity of the voltage applied to the connected bus line.
- a further advantage of the invention is that electrical energy can also be provided in the case of configuration, when a bus participant is only connected and configured via the bus lines, for example during commissioning.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19/114,964 US20250267022A1 (en) | 2022-09-26 | 2023-09-22 | Network device and system with bidirectional energy supply |
| CN202380069156.2A CN119948810A (zh) | 2022-09-26 | 2023-09-22 | 具有双向能量供应的网络设备和系统 |
| DE112023003154.1T DE112023003154A5 (de) | 2022-09-26 | 2023-09-22 | Netzwerkgerät und System mit bidirektionaler Energieversorgung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022124705.8 | 2022-09-26 | ||
| DE102022124705.8A DE102022124705A1 (de) | 2022-09-26 | 2022-09-26 | Netzwerkgerät und System mit bidirektionaler Energieversorgung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024068466A1 true WO2024068466A1 (de) | 2024-04-04 |
Family
ID=88197217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/076227 Ceased WO2024068466A1 (de) | 2022-09-26 | 2023-09-22 | Netzwerkgerät und system mit bidirektionaler energieversorgung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250267022A1 (de) |
| CN (1) | CN119948810A (de) |
| DE (2) | DE102022124705A1 (de) |
| WO (1) | WO2024068466A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023129554A1 (de) | 2023-10-26 | 2025-04-30 | Pilz Gmbh & Co. Kg | Sicherheitsschaltgerät |
| DE102024204277A1 (de) * | 2024-05-07 | 2025-11-13 | Siemens Mobility GmbH | Anordnung mit Verriegelungseinrichtungen |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2228943A1 (de) * | 2009-03-11 | 2010-09-15 | Omron Corporation | Vorrichtung und Netzwerksystem |
| EP2991270A1 (de) * | 2014-08-22 | 2016-03-02 | Linear Technology Corporation | Eindraht-bus-pd-detektion und klassifizierungsschema für ethernet-podl |
| US20160064938A1 (en) * | 2014-08-26 | 2016-03-03 | Cisco Technology, Inc. | Dynamically Configurable Power-Over-Ethernet Apparatus and Method |
| US20180167223A1 (en) * | 2016-12-09 | 2018-06-14 | Rana J. Pratap | Apparatus and method for robust powered ethernet networks |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008049968A1 (de) * | 2008-10-02 | 2010-04-29 | Mobotix Ag | Datenübertragungsgerät |
| DE102011117589A1 (de) * | 2011-11-03 | 2013-05-08 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Einheit mit Schaltfunktion für Ethernet |
| WO2014188633A1 (ja) * | 2013-05-23 | 2014-11-27 | 日本電気株式会社 | 通信システム、電力供給制御方法および電力供給制御非一時的なコンピュータ可読媒体 |
| DE102013211655B4 (de) * | 2013-06-20 | 2016-01-14 | Continental Automotive Gmbh | Flexible Stromversorgung für ein Schnittstellenelement |
| EP3873027B1 (de) * | 2020-02-26 | 2024-07-31 | Schneider Electric Industries SAS | Bidirektionale übertragung elektrischer energie zusammen mit daten über ein drahtgebundenes telekommunikationsnetz |
-
2022
- 2022-09-26 DE DE102022124705.8A patent/DE102022124705A1/de not_active Withdrawn
-
2023
- 2023-09-22 US US19/114,964 patent/US20250267022A1/en active Pending
- 2023-09-22 WO PCT/EP2023/076227 patent/WO2024068466A1/de not_active Ceased
- 2023-09-22 DE DE112023003154.1T patent/DE112023003154A5/de active Pending
- 2023-09-22 CN CN202380069156.2A patent/CN119948810A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2228943A1 (de) * | 2009-03-11 | 2010-09-15 | Omron Corporation | Vorrichtung und Netzwerksystem |
| EP2991270A1 (de) * | 2014-08-22 | 2016-03-02 | Linear Technology Corporation | Eindraht-bus-pd-detektion und klassifizierungsschema für ethernet-podl |
| US20160064938A1 (en) * | 2014-08-26 | 2016-03-03 | Cisco Technology, Inc. | Dynamically Configurable Power-Over-Ethernet Apparatus and Method |
| US20180167223A1 (en) * | 2016-12-09 | 2018-06-14 | Rana J. Pratap | Apparatus and method for robust powered ethernet networks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119948810A (zh) | 2025-05-06 |
| US20250267022A1 (en) | 2025-08-21 |
| DE112023003154A5 (de) | 2025-06-12 |
| DE102022124705A1 (de) | 2024-03-28 |
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