DE102015007286A1 - Method for detecting a vehicle identification means of a vehicle - Google Patents

Abstract

The present invention relates to a method for detecting a vehicle identification means of a vehicle, wherein in a first step, at least one detection module for detecting the vehicle identification means is put into operation, wherein the detection module at least one detection element, in particular an optical camera, and an interface module for processing of the Detection element detected image data and subsequent transmission of the processed image data to a processing element comprises, in a further step, the detection module parking occupancy and / or authorization of the detection module, preferably uniquely assigned parking lot of the vehicle detected by the detection element and the interface module, the processed image data to the Transmitted processing element, and compared in a further step, the processed image data by means of the processing element with authorization data of a database wherein a matching of the processing image data with at least one data set of the database is granted a parking space authorization, and wherein the detection module comprises a radiation emitter emitting electromagnetic radiation in the visible or infrared range, wherein electromagnetic radiation emitted by the radiation emitter from the vehicle identification means to the detection element is reflected back, wherein the detection element, the interface module, the processing element and the radiation emitter are installed in a common housing, and wherein the detection module is designed to be portable.

Description

The present invention relates to a method for detecting a vehicle identification means of a vehicle, a detection module and a detection network for detecting a vehicle identification means according to the respective preambles of claims 1, 7 and 8.

The method described here for detecting a vehicle identification means of a vehicle comprises a first step, in which at least one detection module for detecting the vehicle identification means is put into operation, wherein the detection module at least one detection element, in particular an optical camera, and an interface module for processing of the detection element captured image data and then passing the processed image data to a processing element.

In a further step, the detection module detects a parking space / parking space occupancy and / or authorization of the detection module, preferably uniquely, assigned parking / parking space of the vehicle by means of the detection element, wherein the interface module transmits the processed image data to the processing element.

In a further step, the processed image data are compared by means of the processing element with authorization data of a database or by communication with another external device or module, which can be either a detection module described here or a third-party system, wherein at a match of the processing image data with at least one A data record of the database is granted a parking space authorization, and wherein the detection module comprises a radiation emitter which emits electromagnetic radiation in the visible or infrared range, and wherein electromagnetic radiation emitted by the radiation emitter is reflected back from the vehicle identification means to the detection element.

However, such methods for detecting a vehicle identification means of a vehicle are already known from the prior art. For example, methods for vehicle identification and / or license plate recognition according to the publications are known DE 44 02 612 C2 . DE 200 02 052 U1 and DE 101 53 148 A1 whose disclosure content is hereby fully incorporated by reference. That is, each of the features disclosed in these references also belongs to the disclosure of this patent application.

However, the already known methods have the disadvantage that they are difficult to adapt to the respective operational requirements and are expensive. One reason for this was that the detection modules used so far were only statically fixable in front of a parking lot and are heavy and not very compact.

Another reason was that the occupancy state was determined by external devices such as photoelectric sensors, ground loops, distance sensors or other external signals and an additional necessary logic.

Detection modules of the type already known are therefore often designed in the form of permanently mounted columns which can optically capture the parking space in its entirety.

However, if one wanted to remove a detection module from the parking monitoring, this could only be done with great effort and appropriate mechanical disassembly of the detection module.

Proceeding from this, it is now an object of the present invention to provide a method for detecting a vehicle identification means, which is particularly individually adaptable to the respective operational requirements and at the same time can be operated cost-effectively.

To solve this problem, the present invention makes use, inter alia, of the idea of using the detection element, the interface module, the processing element and the radiation emitter in a common housing, wherein the detection module is designed to be portable.

In this respect, the detection module is set up and also intended to have such a form factor and / or such dimensions, so that the detection module is portable without technical aids.

In particular, the detection module may have such a housing, which has side length dimensions of at most 40 cm. In other words, therefore, the acquisition module is a modular, mobile component that can be designed, in particular, either as part of an overall system or autonomously as an independent system.

In addition, the detection module described here solves the often occurring problem that in the field of battery charging the parking spaces, which are assigned to these battery charging points, for example, by chance passing electric and / or electric hybrid cars or are illegally occupied by vehicles with internal combustion engine. This is because such parking charging stations rarely occur in public places, but the demand for electric cars is steadily increasing. By means of the detection module described here, it is particularly easy to determine whether an authorized or unauthorized vehicle is parked in the parking lot.

In this context, "authorized vehicle" is such a vehicle which has a usage authorization for a specific battery charging point and / or for a specific parking space.

If it is determined by the recognition module that it is an authorized vehicle, it is conceivable that the battery charging station is enabled by the recognition module for the period of time that this vehicle remains in the parking space.

Furthermore, it is conceivable that a power supply of the detection module is maintained via a charging power line of the battery charging point. In addition, the individual battery charging stations can communicate with one another via their respective recognition module in terms of data technology. But even the single charging station can communicate with its associated detection module.

Furthermore, in at least one embodiment, the processing module of the recognition module may also be a controller of the battery charging station. It is conceivable in this context namely that in such a case, the processing module of the detection module itself unlocks the battery charging station and / or controls the charging function in terms of charging current and charging voltage.

It is also conceivable that the detection module described here is used as an access control module. In such a case, the processing module of the recognition module can control an access barrier for access control according to the adjustment processes already described above or, in the case of access roads without a barrier, record the respective authorization of the vehicles arriving or departing. It is also conceivable to use the recognition module as a fuel terminal controller or for single-seat counting in a logistics process or in the area of car-sharing for assessing authorized / unauthorized occupancy of parking spaces.

In this case, the housing, preferably completely, may be formed with a metal or a plastic. For this purpose, it is conceivable that the housing consists of two separate housing halves, which are mechanically connected to each other via suitable connecting means, such as screws. However, it is also conceivable that the housing is formed with a single, in particular metallic, block. In addition, the housing may be free of a non-metallic visible light transparent cover. Namely, it has been recognized that a non-metallic cover (transparent glass or plastic) may cause unnecessary leakage at a plastic-metal interface.

It is also conceivable that the housing is free of an optical window for detecting the vehicle identification means. Namely, the detection element incorporated in the detection module may be an infrared sensor / emitter which does not require an optical inspection window. Alternatively or additionally, however, the detection element may also be attached to the outside of the housing.

The detection element can initially provide the interface module with an image of the vehicle as part of an OCR recognition. By means of an operating software can then this amount of data (eg 800 × 600 = 480,000 bytes for b / w), in which the license plate (= vehicle identification means) hides, on the few bytes (7 bytes for the example flag R-EY517 ) are reduced.

An evaluation of the motion vectors of the image stream for locating the vehicle movement offers the advantage that the acquisition module only has to be aligned very roughly with the parking lot. A fine adjustment for aligning the detection module on the dimensions of the parking lot and / or on the vehicle identification means can therefore be omitted.

In addition, exactly one acquisition module can be assigned to exactly one parking space, thus creating a one-to-one association.

The optics of the camera used can be designed as a needle prism for discrete installation as possible.

In addition, the installation site can be equipped with another camera for manipulation monitoring and integrated into the (overall) system.

The installation on or in barrier or gas station systems is possible without much effort.

The power supply of the acquisition module is possible by cable with an external power source or locally by a solar module.

In accordance with at least one embodiment, the method for detecting a vehicle identification means of a vehicle described here comprises a first step in which at least one detection module for detecting the vehicle identification means is put into operation, wherein the detection module has at least one detection element, in particular an optical camera, and an interface module for processing comprises the image data captured by the detection element and subsequent transmission of the processed image data to a processing element.

In a further step, the detection module detects a parking space occupancy and / or authorization of a parking module of the vehicle, preferably uniquely assigned, of the vehicle by means of the detection element, wherein the interface module transmits the processed image data to the processing element.

In a further step, the processed image data are compared by means of the processing element with authorization data of a database, wherein in a match of the processing image data with at least one data set of the database is granted a parking space authorization, and wherein the detection module comprises a radiation emitter, which electromagnetic radiation in the visible or infrared range and electromagnetic radiation emitted by the radiation emitter is reflected back from the vehicle identification means to the detection element.

According to the invention, the detection element, the interface module, the processing element and the radiation emitter are installed in a common housing, and wherein the detection module is designed to be portable.

According to at least one embodiment, a plurality of detection modules form a detection network, wherein the detection, processing and / or propagation of the image data of each detection element (slave) is controlled by at least one control device, wherein the control device forms a control network together with the detection modules.

In accordance with at least one embodiment, the control device is installed integrated in one of the detection modules. This can mean that one of the detection elements, in addition to or as an alternative to its detection activity, assumes the role of the master for controlling the other detection modules of the control network.

The advantage of the master / slave architecture is that not every acquisition module has to communicate with a central office, but that only one or a few masters, which are mounted cheaply, do this. This is reflected in the reinforced concrete construction in car parks, which severely limits wireless communication.

A possible data exchange via power cable reduces the cabling effort.

Another variant controls a visible traffic light, which displays the light signals according to the authorization.

The mounting of the detection module to housings can be done with angle templates to detect lateral access situation and to allow a planar alignment of the camera to the outer housing. A weather protection nose with preferably rounded edges can also protect against weather influences such as sun or rain and vandalism.

In accordance with at least one embodiment, the control network can be subdivided by means of at least one VLAN switch into at least two network segments (VLAN), which are only logically separated from one another, wherein each of the acquisition modules is triggered by the VLAN switch and / or the control device by each of the Network segments is controlled.

If, for example, a parking garage and its individual parking spaces are equipped for detecting the vehicle identification means with the detection modules according to the invention described above, then often hundreds of detection modules form a very large detection network. In order to be able to categorize individual acquisition modules in a particularly simple manner (according to different priorities, different operators), in one embodiment, instead of a physical network subdivision, a "virtual", that is to say VLAN, subdivision is selected. This ensures that it is possible to respond to changes in the categorization of the detection modules in such a parking garage particularly quickly and without costly conversion work.

For this purpose, the VLAN switch can be installed in at least one of the detection modules or in a separate component.

In accordance with at least one embodiment, a prioritization of the individual network segments is carried out, in particular with regard to their data exchange, by means of the VLAN switch.

In accordance with at least one embodiment, each acquisition module and / or each network segment is assigned at least one VLAN ID, wherein At least one detection module can be controlled via each of the VLAN IDs.

Namely, such systems are also known, based on a traditional network in which the entire control network comprises a plurality of only physically separate subnets and each subnet comprises at least one separate switch to which the terminals are connected. Suitable routers then usually communicate across subnet boundaries. Each subnet can include its own IP range and sometimes its own name services.

In order to communicate over network boundaries, static project-dynamic routes are therefore used in the prior art. This model of separation is clear and concise and has been used for years. However, this has the disadvantages that broadcast requests in the subnet are visible to all subscribers and must be viewed by the endpoints. In other words, so far different devices could only be controlled via appropriate each subnet associated separate and physically separate switches. However, such a construction is particularly costly and extensive in design.

As already mentioned above, the design of each subnetwork with a separate switch and separate physical data lines is thus avoided, so that a single physical structure can be applied to the entire network, whereby this physical structure, ie. H. Network architecture, only because of a logical, in particular mathematical, distinction, d. H. thought, is split.

In this case, the abbreviation "VLAN switch" denotes such a network switch, which is set up and intended to operate a network in the form of a virtual local area network (VLAN).

In this respect, the network segments now claimed, which may each be in the form of a VLAN network, thus enables the separation of the network into a plurality of logical segments, ie, the network segments.

Unlike the physical separation through the assignment to a switch port, the devices are logically separated by a VLAN ID when disconnected by VLANs. In this case, the data stream of each station is provided with an identifier (the VLAN "tag"). This identifier determines the affiliation of a data packet to a specific VLAN. All devices with the same VLAN ID are now in a logical network.

In particular, a broadcast can be limited by the logical separation of the individual networks. Broadcasts are distributed only to members of the same VLAN and not to all controls attached to the switch.

This also contributes not only to a higher performance, but also to greater security, because the traffic is limited to fewer addressees. In addition, users or controls on a VLAN usually have no way to break out of the assigned VLAN. An access (or attack) to another computer that does not belong to its own VLAN can therefore already be prevented by the network switch. If a cross-VLAN communication is necessary, routes can be set up explicitly for this purpose.

In particular, it is pointed out that the VLAN technology described here can be one which is connected to the Industry standard IEEE 802.1Q is adapted and / or compatible with it.

Of the Standard IEEE 802.1Q is a IEEE standardized prioritization and VLAN technology that implements packet-based tagged VLANs, unlike the older, port-only VLANs. The term "tagged" derives from the English term "material tags".

Therefore, tagged VLANs are networks that use network packets that have a specific VLAN tag.

In particular, namely in the 802.1Q standard Data fields for V-LAN tagging are defined, which can be introduced in the data area of an Ethernet packet.

In this respect, the present network may be in the form of an Ethernet communication system.

This has the advantage that usually existing, older switches can forward such packets. The inserted tag typically consists of multiple fields, for example four fields of 32 bits in length.

2 bytes are used for the protocol ID, 3 bits for the Priority field, 1 bit Canonical format indicator and 12 bit VLAN ID.

To uniquely identify a VLAN, each VLAN is therefore first assigned a unique number. One calls therefore this number VLAN ID. A discovery engine equipped with VLAN ID = 1 can communicate with any other device in the same VLAN, but not with a device in another VLAN, such as a VLAN ID. Eg ID = 2, 3, ....

To distinguish between the VLANS, after the Standard IEEE 802.1Q an Ethernet frame extended by 4 bytes. Of these, 12 bits are provided to hold the VLAN ID, so theoretically 4096 - 2 = 4094 VLANs are possible (without using the Canonical format).

In accordance with at least one embodiment, prioritization of the individual network segments, in particular with regard to their data exchange, is made possible by means of the VLAN switch.

It is conceivable that the individual logical network connections are designed according to an OPC standard, ie, for example in the form of OPC UA connections. In particular, it is conceivable that per network segment via the control device several OPC UA endpoints with different IP address, VLAN ID and prioritization according to the above Standards IEEE 802.1Q be available.

If a network segment, which has a unambiguous, preferably one-to-one, allocated a specific VLAN ID, has a higher priority than a logical segment of which different network segment has a correspondingly different VLAN ID, then the control device and / or the VLAN switch to be provided initially to prefer the data exchange of the higher-priority network segment, in order to allow processing of the lower-priority network segment only after removal of the tasks assigned to this higher-priority network segment. In other words, in general: assignment and configuration of the OPC UA endpoints to a specific network segment according to the VLAN ID and assignment of a priority according to the priority of the corresponding VLANs.

In accordance with at least one embodiment, each control element is assigned at least one VLAN ID, and each network segment is assigned at least one, for example exactly one, unique, preferably one-to-one, VLAN ID, whereby at least one control element can be controlled via each of the VLAN IDs.

In this context, the following scenario is generally conceivable with regard to the prioritization of the individual network segments:
It is conceivable that the network comprises several controls, for example four controls. At least these controls therefore together form a processing center with different prioritized data exchange. For this purpose, each of the control elements may comprise an OPC UA interface as described above or a corresponding OPC UA server, with each OPC UA server of a network segment offering, for example, three endpoints. These endpoints are therefore represented by three differently configured addressable VLAN IDs of the respective VLAN network.

For example, an endpoint (ie, an IP address) offers OPC UA services with a low priority (from at least 200 to a maximum of 500 ms) and is therefore assigned to a network segment (VLAN) with a lower priority. For example, typical services, such as hosts from other areas such as BDE, MES and ERP, and even more distant hosts (remote maintenance) can be made available on this logical network segment.

The second endpoint, d. H. the second IP address, provides OPC UA services with a medium priority (at least 50 to 100 ms) and is therefore assigned to a medium priority network segment. In this logical network segment, services are typically provided for the visualization devices or smart devices (tablets,...).

The third endpoint, d. H. the third IP address, provides OPC UA services with the highest priority (from at least 1 to at most 10 ms) and is therefore assigned to a high priority network segment. In this logical network segment, services are typically offered for other controllers for cross-communication.

In other words, in other words, via the unique identification of each network segment via the unique, preferably unique, assigned VLAN ID, a separate control of the component of the acquisition module based exclusively on logical separation is possible, in particular also by a single VLAN switch, without the individual ones Control networks would have to be subject to their separate activation of a physical network separation.

Nevertheless, the network described here may comprise a switch (for example a convertible switch) by means of which a physical subdivision of the network and a network can be implemented as described above VLAN subdivision can be selected.

The invention further relates to a detection module for detecting a vehicle identification means. The features disclosed for the above method are also disclosed for the detection module described here, and vice versa.

In accordance with at least one embodiment, the detection module for detecting a vehicle identification means of a vehicle comprises at least one detection element, in particular an optical camera, as well as an interface module for processing the image data captured by the detection element and subsequent transmission of the processed image data to a processing element.

In addition, by means of the detection module, a parking space occupancy and / or authorization of a parking module of the vehicle, preferably uniquely assigned, of the vehicle can be detected by means of the detection element and transmitted by the interface module, the processed image data to the processing element, wherein the processed image data by means of the processing element with authorization data of a database where the image data is matched with at least one data set of the database, and wherein the detection module comprises a radiation emitter emitting electromagnetic radiation in the visible or infrared region, electromagnetic radiation emitted by the radiation emitter from the vehicle identification means to the Detection element is reflected back

According to the invention, the detection element, the interface module, the processing element and the radiation emitter are installed in a common housing, wherein the detection module is designed to be portable.

In this case, the detection module described here has the same advantages and optional configurations as the method described here.

The invention further relates to a detection network for detecting a vehicle identification means. The features disclosed for the above method and the detection module described above are also disclosed for the detection network described here, and vice versa.

According to at least one embodiment, the detection network comprises a plurality of detection modules, in particular of the type described above, wherein the detection modules are in data communication via a control network, and wherein the detection, processing and / or transfer of the image data of each detection element (slave) by at least one Controlling device (master) is controlled, wherein the control device together with the detection modules form the control network.

In this case, the detection network described here has the same advantages and optional configurations as the method described here and the detection module described here.

In the following, the method described here as well as the detection network described here will be explained in greater detail on the basis of an exemplary embodiment and the associated figures.

The 1 shows a schematic perspective view of an embodiment of a detection module described here with the housing open.

The 2 shows in a schematic perspective view of an embodiment of a detection module described here, when it is mounted on license plate stand of a parking lot.

The 3 shows a schematic plan view of an embodiment of a detection network described here.

In the exemplary embodiments and the figures, the same or equivalent components are each provided with the same reference numerals. The illustrated elements are not to be considered as true to scale, but individual elements may be exaggerated to better understand.

In the 1 is a schematic perspective view of an embodiment of a detection module described here 2 for detecting a vehicle identification means 1 of a vehicle 10 shown. The acquisition module 2 includes a housing 24 from two metallic half-molds, which are detachably connected to each other via snap and / or screw. The two half-forms form a cavity in which all other elements of the detection module 2 are positioned.

In addition, the detection module described here includes 2 at least one detection element 21 , in particular an optical camera, and an interface module 22 for processing of the detection element 21 captured image data B1 and then passing the processed image data B2 to a processing element 25 , in which by means of the acquisition module 2 a parking space occupancy and / or authorization of the acquisition module 2 , preferably unique, associated parking of the vehicle 10 by means of the detection element 21 detectable and by means of the interface module 22 the processed image data B2 to the processing element 25 can be transmitted, and wherein the processed image data B2 by means of the processing element 25 with authorization data B3 of a database 3 are comparable, wherein at a match of the processing image data B2 with at least one record 30 the database 3 parking entitlement is granted, and wherein the acquisition module 2 a radiation emitter 23 which emits electromagnetic radiation in the visible or infrared range, wherein of the radiation emitter 23 emitted electromagnetic radiation from the vehicle identification means 1 to the detection element 21 is reflected back, the detection element 21 , the interface module 22 , the processing element 25 and the radiation emitter 23 in a common housing 24 are installed, and wherein the detection module 2 is designed portable.

In the 2 is that in the 1 described acquisition module 2 at one end of the acquisition module 2 clearly assigned parking lot arranged. In particular, the acquisition module 2 detachably mounted on a parking lot marking means. The acquisition module 2 now detects if a vehicle enters its assigned parking space. After an occupancy of the parking lot by the vehicle 10 captures the acquisition module 2 via its detection element 21 preferably fully automatically the road license plate (= vehicle identification means) of the vehicle 10 and thus equalizes the image data B1 with the database 30 from. If there is no match of the image data B1 or B2 in the database 30 stored authorization data B3, an alarm is automatically triggered.

In the 3 is an embodiment of a detection network described herein 200 shown.

That in the 3 illustrated detection network 200 includes a variety of detection modules described herein 2 that have a control network 4 in data communication with each other, wherein the detection, processing and / or transfer of the image data of each detection element 2 (Slave) by at least one control device (master) is controlled, wherein the control device, in particular the control device 40 , together with the acquisition modules 2 the control network 4 formed. In particular, one of the detection elements forms 2 The master therefore controls not only himself, but also at least one other detection element 2 (Slave), especially according to the network type.

The control network 4 is thus by means of at least one VLAN switch 5 , the part of the control network 4 can be, in at least two, only logically separated, network segments 60 . 61 (VLANs), and where each of the acquisition modules 2 depending on the control by the VLAN switch 5 and / or the control device 40 through each of the network segments 60 . 61 is controllable.

It is done by means of the VLAN switch 5 a prioritization and / or selection of the individual network segments 60 . 61 especially with regard to their data exchange, with each acquisition module 2 and / or each network segment 60 . 61 At least one VLAN IDs is assigned, wherein on each of the VLAN IDs at least one acquisition module 2 is controllable.

In particular, from the 3 recognizable that the control device 40 (Master) itself part of the collection network 200 and also a recognition module 2 is, but all other recognition modules 2 only from the control device 40 be controlled and thus it with these recognition modules 2 is about slaves. Insofar takes only one recognition module 2 or a predetermined selection of recognition modules 2 (as the master) has a dual role (recognition and control of data communication within the control network 4 ) one. In addition, the control device comprises 40 a communication unit, in particular a WLAN module, by means of which the control device 40 in turn, their data to a business computer, which may be placed off-site, transmitted. Also, this communication unit can very compact completely in the housing 24 be housed.

The invention is not limited by the description with reference to the embodiments. Rather, the invention includes any novel feature as well as any combination of features, including in particular any combination of features in the claims, even if this feature or combination itself is not explicitly stated in the claims or in the embodiments.

LIST OF REFERENCE NUMBERS

1

Vehicle identification means

2

acquisition module

21

sensing element

22

Interface Module

23

radiation emitter

24

casing

25

processing element

3

Database

30

record

4

Control network

40

control device

5

VLAN switch

10

vehicle

60, 61

Network segments

B1

image data

B2

processed image data

B3

authorization data

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4402612 C2 [0005]
• DE 20002052 U1 [0005]
• DE 10153148 A1 [0005]

Cited non-patent literature

• Industry standard IEEE 802.1Q [0052]
• Standard IEEE 802.1Q [0053]
• 802.1Q standard [0055]
• Standard IEEE 802.1Q [0060]
• Standards IEEE 802.1Q [0062]

Claims (8)

Procedure ( 100 ) for detecting a vehicle identification means ( 1 ) of a vehicle ( 10 ), wherein - in a first step, at least one acquisition module ( 2 ) for detecting the vehicle identification means ( 1 ), whereby the acquisition module ( 2 ) - at least one detection element ( 21 ), in particular an optical camera, - and an interface module ( 22 ) for processing the data from the detection element ( 21 ) and subsequently passing the processed image data (B2) to a processing element (B1) 25 ), in a further step the acquisition module ( 2 ) a parking space occupancy and / or authorization of the acquisition module ( 2 ), preferably uniquely assigned parking space of the vehicle ( 10 ) by means of the detection element ( 21 ) and the interface module ( 22 ) the processed image data (B2) to the processing element ( 25 ), and in a further step, the processed image data (B2) by means of the processing element ( 25 ) with authorization data (B3) of a database ( 3 ), wherein if the processing image data (B2) matches at least one data set ( 30 ) of the database ( 3 ) is granted a parking space authorization, and wherein the acquisition module ( 2 ) a radiation emitter ( 23 ), which emits electromagnetic radiation in the visible or infrared range, wherein of the radiation emitter ( 23 ) emitted electromagnetic radiation from the vehicle identification means ( 1 ) to the detection element ( 21 ) is reflected back, characterized in that the detection element ( 21 ), the interface module ( 22 ), the processing element ( 25 ) and the radiation emitter ( 23 ) in a common housing ( 24 ) and the acquisition module ( 2 ) is designed portable. Procedure ( 100 ) according to claim 1, characterized in that a plurality of detection modules ( 2 ) which form a detection network, wherein the detection, processing and / or forwarding of the image data (B1) of each detection element ( 2 ) (Slave) by at least one control device ( 40 ) (Master), the control device ( 40 ) together the acquisition modules ( 2 ) a control network ( 4 ) trains. Procedure ( 100 ) according to claim 2, characterized in that the control device ( 40 ) in one of the acquisition modules ( 2 ) is integrated integrated. Procedure ( 100 ) according to claim 2 or 3, characterized in that the control network ( 4 ) by means of at least one VLAN switch ( 5 ) into at least two, only logically separated, network segments ( 60 . 61 ) (VLAN), and wherein each of the acquisition modules ( 2 ) depending on the control by the VLAN switch ( 5 ) and / or the control device ( 40 ) through each of the network segments ( 60 . 61 ) are controllable. Procedure ( 100 ) according to at least one of claims 2 to 4, characterized in that by means of the VLAN switch ( 5 ) a prioritization of the individual network segments ( 60 . 61 ), in particular with regard to their data exchange. Procedure ( 100 ) according to the preceding claim, characterized in that each detection module ( 2 ) and / or each network segment ( 60 . 61 ) is associated with at least one VLAN ID, whereby at least one acquisition module ( 2 ) is controllable. Acquisition module ( 2 ) for detecting a vehicle identification means ( 1 ) of a vehicle ( 10 ), comprising - at least one detection element ( 21 ), in particular an optical camera, - and an interface module ( 22 ) for processing the data from the detection element ( 21 ) and subsequently passing the processed image data (B2) to a processing element (B1) 25 ), wherein by means of the detection module ( 2 ) a parking space occupancy and / or authorization of the acquisition module ( 2 ), preferably uniquely assigned parking space of the vehicle ( 10 ) by means of the detection element ( 21 ) and by means of the interface module ( 25 ) the processed image data (B2) to the processing element ( 25 ), and the processed image data (B2) being processed by means of the processing element (B2) 25 ) with authorization data (B3) of a database ( 3 ), wherein if the processing image data (B2) coincide with at least one data set ( 30 ) of the database ( 3 ) is granted a parking space authorization, and wherein the acquisition module ( 2 ) a radiation emitter ( 23 ), which emits electromagnetic radiation in the visible or infrared range, wherein of the radiation emitter ( 23 ) emitted electromagnetic radiation from the vehicle identification means ( 1 ) to the detection element ( 21 ) is reflected back, characterized in that the detection element ( 21 ), the interface module ( 22 ), the processing element ( 25 ) and the radiation emitter ( 23 ) in a common housing ( 24 ) and the acquisition module ( 2 ) is designed portable. Collection network ( 200 ) for detecting a vehicle identification means ( 1 ) of a vehicle ( 10 ), comprising - a plurality of acquisition modules ( 2 ) according to claim 7 via a control network ( 4 ) in data communication with each other, wherein the detection, processing and / or transfer of the image data of each detection element (slave) is controlled by at least one control device (master), wherein the control device together with the detection modules ( 2 ) the control network ( 4 ) trains.

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