EP2219990A1 - Industrial truck having rfid-supported device for identifying cargo goods - Google Patents
Industrial truck having rfid-supported device for identifying cargo goodsInfo
- Publication number
- EP2219990A1 EP2219990A1 EP08861469A EP08861469A EP2219990A1 EP 2219990 A1 EP2219990 A1 EP 2219990A1 EP 08861469 A EP08861469 A EP 08861469A EP 08861469 A EP08861469 A EP 08861469A EP 2219990 A1 EP2219990 A1 EP 2219990A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- slot
- fork
- truck according
- rfid
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/0755—Position control; Position detectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
Definitions
- the present invention relates to an industrial truck with an RFID-based
- an RFI D application consists of a read / write device, a cable-connected antenna and a mobile data memory that can be attached to any object.
- a signal is generated, which is emitted on one of the frequency bands released for RFI D applications via the antenna as an electromagnetic field.
- the mobile data memory extracts energy and data from this field and sends data back to an antenna on request.
- Transponders can either be described with data or only data from transponders can be read out.
- a transport container with an RFID transponder unit can be seen, for example, from DE 20 2007 005 620 U1.
- RFI D systems are generally used very frequently to control the flow of goods for logistics purposes, so that the data obtained can provide valuable information for comprehensive logistics planning and control.
- Known applications in the field of logistics use RFI D systems that communicate in frequency ranges of, for example, 13.56 MHz or 868 or 915 MHz. At high frequencies is usually worked with inductive coupling, while working at the ultra-high frequency with microwaves.
- DE 10 2006 014 447 A1 describes an industrial truck with a load-carrying means and an RFID transmitting / receiving unit whose transmitting and receiving area is directed onto a region of the load-carrying means and onto a region in front of the load-carrying means. Similar industrial trucks continue to emerge from DE 10 2006 010 290 A1, from DE 10 2006 010 291 A1, from DE 10 2006 010 292 A1 and from DE 10 2006 010 293 A1.
- DE 20 2005 005 409 U1 describes an industrial truck with at least one vertically movable fork, comprising at least two forks, and at least one device in the region of the fork for wireless communication with an RFID transponder.
- the communication device is disposed on an outside of an approximately vertical side wall of a fork of the forklift.
- the device is for receiving and / or transmitting signals in a wavelength range of 868 MHz to 920 MHz and / or in a wavelength range of 125 kHz to 135 kHz and / or with a wavelength of approximately 13.56 MHz and / or with a Wavelength of approximately 2.45 GHz provided.
- DE 10 2005 024 882 A1 describes a similar industrial truck.
- DE 10 2005 016 276 A1 discloses an industrial truck with at least one device arranged on a fork carriage for communication with a communication system, in particular with an RFID transponder. Furthermore, means are proposed for changing the coverage area covered by the device for communication with an identification system.
- the NL 940 18 36 A shows an automatic identification system for with a
- RFID transponder equipped pallets that can be handled with a forklift.
- For a wireless signal reception two forked each with a ferrite core and aligned orthogonal to the longitudinal axis of the fork antenna antennas are arranged in the forks of the forklift fork for each fork of the forklift.
- the antennas are usually mounted on the front of the truck and send the fields thus directed in the direction of travel, in order to identify transponders on carriers or goods in this way.
- the existing solutions on the front of the trucks are designed so that transponders on the top of the loads can be read well. Reading attempts become problematic if the loading unit contains metal or is made of metal. The communication path from the RFID antenna to the transponder of the charge is then too much attenuated by the metal in the propagation path and the transponder can sometimes no longer be read correctly.
- the antenna is brought close to the antenna to be read transponder, which greatly reduces the environmental impact.
- the antenna mounted on the fork tine must be mechanically very robust in order to withstand the harsh operating environment. The risk of shearing the patch antenna from the fork is very high.
- the object of the present invention is therefore seen to provide an industrial truck with an RFID transceiver unit, which makes it possible to detect mobile data storage on charge carriers by an RFID antenna assigned to a load-bearing means of the industrial truck and to independently determine its data content read the loaded goods.
- the solution should also be as robust as possible mechanically and flexible in the use of multiple pallet clips.
- an industrial truck has an RFID transmitter / receiver unit for detecting and reading out memory contents of mobile data memories of loads and at least one RFID antenna which is assigned to a load-bearing means of the industrial truck. It is provided that the RFID antenna is disposed within the outline of the load-bearing means and integrated into this structurally.
- the RFID antenna is designed in particular as a slot antenna with a slot-shaped cavity within the load-bearing means. The RFID antenna can thus be integrated into the load-carrying device in a robust and non-shattering manner.
- the transponder introduced into the charge carriers are not endangered and / or damaged by the antenna or its attachment, although they can be pushed very close to them.
- the load-bearing means may in particular be a fork tine and / or a fork shoe of the industrial truck.
- transponders which are located on charge carriers can be reliably read out at any time, even if the charge has large metal shares, since a transponder arranged on the underside of a load carrier or a pallet can be read out without problems by means of the RFID antenna according to the invention, without the risk of damage to the transponder would be given.
- the smooth-surfaced outer contour of the forks prevents such damage.
- a first variant of the invention provides that the slot antenna has a continuous slot.
- a slot with a length is introduced into the fork tine or a fork shoe of the truck, which is half Wavelength of the frequency used multiplied by an antenna shape specific extension factor.
- the height of the slot determines the usable bandwidth of the antenna; the lower the slot height, the lower the usable bandwidth.
- the slot must be pulled completely through the fork in this variant.
- the electrical connection of the antenna via a suitable high-frequency cable, usually via a coaxial cable. Its two poles must be attached to the slot in a manner such that the first and second contacts are opposite each other.
- a variation of the contact position to the side can be used for impedance transformation when connecting cables that do not correspond to 50 ohms.
- a displacement of the contacts in the transverse direction of the fork does not change the operation.
- the connection should be made on one of the two outer sides of the antenna. If the slot is not guided through the fork with a constant cross-section (eg due to manufacturing technology), the position of the coupling in the transverse direction also plays a role. By simulation, this point can be found for each slot geometry.
- the slot antenna has a slot open on one side.
- the one-sided open slot may in particular have the contour of a cuboid, one-sided open cavity.
- the slot is not completely pulled through the fork here.
- the depth of the slot is approximately one quarter of the free space wavelength, which is used to achieve an impedance transformation from short to open.
- the excitation (first and second contact) is located at the front of the antenna opening. Due to the impedance transformation with the slot having a depth of a quarter of the wavelength used, the short circuit at the rear of the antenna looks like an open circuit, and thus does not affect the function of the antenna.
- the feed can be moved laterally just as in the variant described above.
- the antenna can also be shaped like one in the
- High-frequency technology usual transition between cable and a waveguide.
- the milled cuboid corresponds in dimensions to a waveguide at the frequency used.
- the excitation takes place here as in the variant described above a contact at a distance of one quarter of the wavelength used to the rear wall of the cuboid.
- the slot must have a length and width that is matched to a used transmit / receive wavelength and / or wavelength bandwidth.
- Another variant may provide that the antenna as a module in the
- the antenna can in this case be pulled out of the fork as a block or else mounted in this way.
- the antenna function of this block can be manufactured using the same designs as in the three aforementioned variants.
- antenna types other than those described in the variants e.g. Planar antennas on a circuit board
- the contacting of the antenna in the block may differ depending on the antenna structure.
- All variants can be used not only directly in the fork, but also as a retrofit solution by integrating the antenna into a fork shoe.
- Such fork shoes are used if the original forks of the truck are not long or not wide enough. Since a fork shoe can not be made of solid material in principle, the same space is no longer available for integration as in a normal fork tine. The different variants are therefore only with a strong reduction of the antenna in the shoe to integrate, which will require a lower efficiency.
- the first variant with the continuous slot is not dependent on the depth of the slot and can be integrated into a fork shoe without any problems. The fork on the inside of the fork shoe affects the slot antenna negative, which is why a certain distance must be maintained.
- the antennas can each be arranged laterally in the fork tine or the fork shoe.
- This transponder which are located on the side of the fork, can be read, but not transponder, which are located at the top of the fork.
- the antennas to be installed can also be rotated arbitrarily about the longitudinal axis of the fork, so that transponders that are not on the side of the fork, can be read.
- the cable is routed to the outside of the fork, this too can be included in the radiation.
- a non-ideal connection to the antenna causes reflections which propagate on the cable and are also emitted.
- the cable can thus be used in its entire length as an antenna.
- This reading field along the cable can support the detection of transponders by spanning a smaller, but in the dimension of the length of the cable large reading field. To achieve this effect, there must be no antenna at the end of the cable, only the radiation of the cable can be used. To support the radiation of the cable, this can be slit lengthwise. This slot allows the field to propagate outward within the cable.
- This design as a leak wave radiator has the advantage that it is easy to install and to lay.
- the RFI D antenna is arranged in a horizontal or approximately horizontal support region of the load-carrying means, for example in the horizontal, forwardly projecting portion of a height-adjustable fork tine.
- an RFID antenna can be arranged in a vertical or approximately vertical support region of the load-bearing means.
- the RFID antennas formed for example by slot antennas can thus be arranged vertically and / or horizontally. With a slot or an RFID antenna on the vertical, vehicle-proximate support region of the load-carrying means or the fork transponder, which are positioned laterally to the fork, detected and read their data.
- This slot can also be placed vertically on to read this way transponder, which are arranged above the fork.
- the two differently oriented RFID antennas or slots may also overlap.
- the vertical slot can intersect with the horizontal slot, so that only one common cable connection is required to power both slots and to transmit the signal.
- the effective transmission power of the RFID transceiver unit according to the invention with the associated RFID antenna, according to the present invention preferably formed by a slot antenna can be set or defined by constructional or constructional boundary conditions.
- the distance to which a transponder is read is primarily determined by the power radiated by the antenna relative to the space segment reached by the antenna.
- Detuning This targeted detuning of the antenna can be achieved, for example, by choosing an unfavorable connection point, by using a filling material with higher losses, by not optimally selected slot length or by reducing the antenna performance.
- a reduction in the antenna power can be achieved, for example, by interposing an attenuator.
- the slot-shaped cavity of the slot antenna is provided with a filling material.
- This filling material may optionally have a regular or irregular patterning and / or perforation.
- the tuning of the antenna can be greatly influenced by the fill material used for the slot. A shift of the resonance frequency of the antenna can be achieved in a desired manner by a variation of the filling material or by a suitable structuring of the same. Thus, for example, an antenna with too low a tuned resonance frequency can be tuned to a higher frequency by introducing holes into the filler material.
- this voting option can be used for country-specific adjustments of the frequency ranges of the antenna, since different transmission frequencies for the desired intended use of the RFID unit are available in different countries.
- the RFI D antenna can be either an electrically conductive line connection or an inductively coupled, galvanically isolated
- connection of the antenna for example, in a conventional manner, by directly connecting a cable or a suitable
- a galvanically isolated feed can be provided, for example by an inductive coupling at one end of the slot-shaped cavity of the slot antenna. This is done by a coil on
- Cable end generates a magnetic field that excites the antenna to vibrate.
- Fig. 1 shows a schematic perspective view of an industrial truck in the form of a forklift.
- Fig. 2 shows two views of a first variant of an RFID antenna according to the invention in a fork tine of a truck.
- Fig. 3 shows two views of a second variant of the fork with inventive RFID antenna.
- FIG. 4 shows two views of a third variant of the fork with inventive RFID antenna.
- FIG. 5 shows two views of a fourth variant of the fork with inventive RFID antenna.
- FIG. 6 shows two views of a fifth variant of an RFID antenna according to the invention in a fork shoe which can be pushed onto a fork tine of a truck.
- FIG. 7 shows two views of a production variant of the first variant of the RFID antenna according to FIG. 2.
- FIG. 8 shows two views of a sixth variant of a fork with RFID antenna according to the invention.
- FIG 9 shows two views of a seventh variant of a fork with inventive RFID antenna.
- FIG. 1 shows a variant of a
- Industrial truck 10 in the form of a conventional forklift 12.
- the forklift 12 on a front load handling device 18 which a lifting frame 20 and along this lifting frame 20 in the vertical direction can be raised and lowered, substantially horizontally front fork pair fork 22 has.
- the lifting frame 20 can be moved backwards by a defined angle about a pivot axis that is close to the ground, horizontal, transverse to the vehicle longitudinal direction. be tilted towards the cab 16, which helps especially in heavier and / or bulky loads to shift the center of gravity to the rear to prevent vehicle instability or tilting of the entire forklift 12 forward.
- At least one of the two forks 24 of the pair of forks 22 has an RFID antenna 26 according to the invention, which is provided within the outer circumference of a flat, rectangular cross-section fork 29, i. is integrated in this.
- RFID antenna 26 according to the invention, which is provided within the outer circumference of a flat, rectangular cross-section fork 29, i. is integrated in this.
- FIG. 2 shows two views of a first variant of the RFID antenna 26 according to the invention in a fork tine 24 of an industrial truck.
- the upper view shows a top view of the fork tine 24, while the lower view shows a side view of the fork tine 24.
- the RFID antenna 26 is formed as a flat slot 28 which extends at a constant height over the entire width of the fork tine 24.
- the slot 28 may in particular a Have length 30, which corresponds to half the wavelength of the transmission and reception frequency used multiplied by a specific for the respective antenna shape extension factor.
- the width 32 of the slot 28 corresponds to the width of the fork tine 24, while the height 34 determines the usable bandwidth of the antenna 26. The smaller the slot height 34 is, the lower the usable bandwidth of the antenna 26.
- the slot in this first variant has to be pulled completely through the fork tine 24.
- the electrical connection of the antenna 26 via a suitable high-frequency cable, normally a coaxial cable (not shown). Its two contact poles 36 and 38 must be attached to the slot 28 in a manner such that the first and second contacts 36, 38 face each other as shown in FIG.
- a variation of the contact position to the side can be used for impedance transformation when connecting cables that do not correspond to 50 ohms.
- a displacement of the contacts 36 and 38 in the transverse direction of the fork tine 24 does not change the operation.
- the connection should be made on one of the two outer sides of the antenna 26.
- the cable can preferably be installed in a longitudinal slot and / or covered or clad, which can reduce the risk of damage and breakage of the cable.
- the position of the coupling in the transverse direction also plays a role.
- an optimal coupling point can be found for each slot geometry.
- FIG. 3 shows two views of a second variant of the fork prong 24 with inventive RFID antenna 26.
- the slot 28 is not completely drawn through the fork tine 24, but has a smaller depth 40 on.
- the depth 40 of the slot 28 is preferably about one quarter of the wavelength in the antenna of the transmit and receive wavelengths used, respectively, which can be used to achieve impedance transformation from short to open. This is too notice that the wavelength in the antenna depends on the filler used.
- the excitation (contacts 36 and 38) are for this purpose at the front of the antenna opening 42.
- the short circuit at the rear of the antenna 26 looks like an idle, and Thus, does not affect the function of the antenna 26.
- the feed through the contact poles 36 and 38 can be moved laterally as well as in the variant of FIG.
- FIG. 4 shows two views of a third variant of the fork prong 24 with RFID antenna 26 according to the invention.
- the antenna 26 is shaped like a transition between cable and a waveguide common in high-frequency technology.
- the milled box 44 of the antenna 26 corresponds in size to a waveguide at the frequency used.
- the excitation takes place here as in the second variant according to FIG. 3 with a contact pair 36, 38 at a distance of ⁇ / 4 to the rear wall 46 of the cuboid 44.
- FIG. 5 shows two views of a fourth
- Variant of fork 29 with inventive RFID antenna 26 is mounted here as a module 48 in the fork tine 24, so it can be pulled out as a block from the fork tine 24 or mounted as a complete block in this.
- the antenna function of this block can be manufactured using the same designs as in the three aforementioned variants.
- the use of other types of antennas as in the variants according to FIG. 2 to FIG. Planar antennas on a circuit board, is in principle also possible here.
- the contacting of the antenna 26 can be carried out in the module 48 depending on the antenna structure in various ways.
- the external contact is made via a cable going directly into the block 48 or a suitable high frequency connection on the outside of the block 48.
- FIG. 6 shows two views of a fifth variant of an RFID antenna 26 according to the invention in a fork shoe 50 which can be pushed onto a fork tine 24 of a truck.
- all variants shown can be used not only directly in the fork tine 24 but also as Retrofit solution by the antenna 26 is integrated into a fork shoe 50.
- Such fork shoes 50 are used if the original forks of the truck are not long or not wide enough. Since a fork shoe 50 can in principle not consist of solid material, there is no longer as much space available for integration as in a normal fork 24. The various variants of the antenna 26 are therefore only with a strong reduction of the antenna 26 in the shoe 50 to integrate.
- FIG. 7 shows two views of a
- the slot 28 may for example be made by two Einfräsungen with a side milling cutter, so that there is no constant slot width as in the variant of FIG. 2, but an irregular slot contour ,
- the antennas 26 are each drawn on the side of the fork tine 24 or the fork shoe 50.
- This transponder, which are located on the side of the fork tine 24 are read, but not transponder, which are located at the top of the fork tine 24.
- the antennas to be installed 26 can also be rotated arbitrarily about the longitudinal axis of the fork tine 24 so that transponders that are not on the side of the fork, can be read.
- FIG. 8 shows two views of a sixth variant of a fork with RFID antenna according to the invention.
- one of the fork tine 24 is equipped with a passive slot 54.
- the fork itself is shaped as if it contained an antenna, but not connected to a cable.
- Passive radiator 54 passes the EM-FeId on the other side of the fork, which can be used in collapsible multi-pallet clamps, with an installed antenna radiation of the antenna to both sides in the
- All variants shown in FIGS. 2 to 8 can be further miniaturized using suitable filling material with a dielectric constant greater than air.
- the efficiency of the antenna 26 in this case is worse, but this can be compensated by a larger transmission power.
- FIG. 9 shows two views of a seventh variant of a fork with inventive RFID antenna. If the cable 56 is laid on the outside of the fork tine 24, this can also be included in the radiation. Such a variant is explained in more detail with reference to FIG. 9.
- a non-ideal connection to the antenna gives rise to reflections which propagate on the cable 56 and are also emitted.
- the cable 56 can thus be used in its entire length as an antenna. This reading field along the cable 56 can support the detection of transponders by spanning a smaller, but in the dimension of the length of the cable 56 large reading field. To achieve this effect, no antenna must be at the end of the cable 56, only the radiation of the cable 56 can be used. To support the radiation of the cable 56, this can be slit lengthwise. This slot allows the field to propagate outward within the cable.
- This design as a leak wave radiator has the advantage that it is easy to install and to lay.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007061707A DE102007061707A1 (en) | 2007-12-19 | 2007-12-19 | Industrial truck with an RFID-based device for the identification of cargo |
PCT/EP2008/010859 WO2009077194A1 (en) | 2007-12-19 | 2008-12-18 | Industrial truck having rfid-supported device for identifying cargo goods |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2219990A1 true EP2219990A1 (en) | 2010-08-25 |
EP2219990B1 EP2219990B1 (en) | 2016-04-20 |
Family
ID=40513785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08861469.8A Not-in-force EP2219990B1 (en) | 2007-12-19 | 2008-12-18 | Industrial truck having rfid-supported device for identifying cargo goods |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2219990B1 (en) |
DE (1) | DE102007061707A1 (en) |
WO (1) | WO2009077194A1 (en) |
Families Citing this family (12)
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DE102010031516A1 (en) * | 2010-07-19 | 2012-01-19 | Balluff Gmbh | Identification system, method for contactless writing and / or reading of a data carrier and application |
AT510900A1 (en) * | 2011-01-14 | 2012-07-15 | Pensold Andreas Ing | UHF READERSYSTEM FOR A FORKLIFT |
DE102011100046A1 (en) * | 2011-04-29 | 2012-10-31 | Hörmann KG Antriebstechnik | Radio frequency identification device for detecting objects marked with radio frequency identification device in transport path for objects, has radio frequency identification device transmission and reception unit |
DE102011114736A1 (en) | 2011-03-18 | 2012-09-20 | Hörmann KG Antriebstechnik | Loading dock for docking transport vehicle to building, has metallic plate provided with radio frequency identification reception and/or transmission unit provided at signal pass band that transmits radio frequency identification signals |
PL2686811T3 (en) | 2011-03-18 | 2015-08-31 | Hoermann Kg Antriebstechnik | Access-structure for a contruction site and corresponding construction element |
DE102012000762A1 (en) | 2012-01-18 | 2013-07-18 | Ott-Jakob Spanntechnik Gmbh | antenna cover |
DE102012102417A1 (en) * | 2012-03-21 | 2013-09-26 | Balluff Gmbh | identification system |
NL2008946C2 (en) * | 2012-06-06 | 2013-12-09 | Berend Breman | CYLINDER-MADE PRODUCT, RECORDING DEVICE, VEHICLE AND METHOD. |
DE102013203663A1 (en) * | 2013-03-04 | 2014-09-04 | Fh Köln | Signaling device, has terminals connected with first and second long sides and reader for determining activation status of radio frequency identification chip for determining spacing of chip relative to ends of slit |
DE102015104828B4 (en) * | 2015-03-27 | 2020-01-23 | Torsten Weber | Measuring pins for a soil testing device, a soil testing device and a soil testing system, as well as a method for determining the compaction properties of a subsoil |
CN109728404B (en) * | 2018-12-28 | 2024-05-28 | 浙江中烟工业有限责任公司 | Storage logistics forklift conformal RFID leakage cable multi-polarization MIMO antenna system |
CN109586013B (en) * | 2018-12-28 | 2021-02-09 | 浙江中烟工业有限责任公司 | Forklift conformal reader antenna with beam forming function and forklift adopting antenna |
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DE9306107U1 (en) * | 1993-04-19 | 1994-08-25 | Rotring International Gmbh & Co Kg, 22525 Hamburg | Device for storing position data of pallets |
NL9401836A (en) | 1994-11-04 | 1996-06-03 | Nedap Nv | Method and system for identifying pallets |
WO2001037215A1 (en) * | 1999-11-18 | 2001-05-25 | Siemens Aktiengesellschaft | Mobile data carrier with a transponder made from a surface wave component with a slot antenna |
DE29920240U1 (en) * | 1999-11-18 | 2000-12-28 | Siemens Ag | Mobile data carrier with surface wave component and slot antenna |
JP2002265060A (en) * | 2001-03-09 | 2002-09-18 | Hitachi Cable Ltd | Article transport system using non-contact tag |
US6669089B2 (en) * | 2001-11-12 | 2003-12-30 | 3M Innovative Properties Co | Radio frequency identification systems for asset tracking |
DE202005005409U1 (en) | 2005-04-06 | 2005-06-16 | Still Gmbh | Industrial truck with a load handling device |
DE102005016276A1 (en) | 2005-04-08 | 2006-10-12 | Still Gmbh | Industrial truck with a vertically movable fork carrier |
WO2006124761A2 (en) | 2005-05-13 | 2006-11-23 | Ems Technologies, Inc. | Pallet jack antenna for rfid system |
DE102005024882A1 (en) * | 2005-05-31 | 2006-12-07 | Still Gmbh | Truck |
DE102006010290A1 (en) | 2006-03-03 | 2007-09-06 | Jungheinrich Ag | Floor conveyor for use in stock management system has on-board computer for generating data about goods to be conveyed and goods position, and radio unit for transmitting generated data to central data processing system for stock management |
DE102006010293A1 (en) | 2006-03-03 | 2007-09-06 | Jungheinrich Ag | Industrial truck with a display unit for the operator |
DE102006010291A1 (en) | 2006-03-03 | 2007-09-06 | Jungheinrich Ag | Industrial truck with usage data acquisition |
DE102006010292A1 (en) | 2006-03-03 | 2007-09-06 | Jungheinrich Ag | Industrial truck with an on-board computer |
DE102006014447A1 (en) | 2006-03-29 | 2007-10-04 | Jungheinrich Aktiengesellschaft | Industrial truck, has fork occupancy sensor provided to detect load on loading fork, and control unit that initiates activation of transmitting and receiving unit for receiving data from external transponder, when sensor has detected load |
JP2008110836A (en) * | 2006-10-30 | 2008-05-15 | Japan Pallet Rental Corp | Forklift |
DE202007005620U1 (en) | 2007-04-17 | 2007-08-02 | Gebhardt Transport- Und Lagersysteme Gmbh | transport container |
-
2007
- 2007-12-19 DE DE102007061707A patent/DE102007061707A1/en not_active Withdrawn
-
2008
- 2008-12-18 WO PCT/EP2008/010859 patent/WO2009077194A1/en active Application Filing
- 2008-12-18 EP EP08861469.8A patent/EP2219990B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
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See references of WO2009077194A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009077194A1 (en) | 2009-06-25 |
DE102007061707A1 (en) | 2009-06-25 |
EP2219990B1 (en) | 2016-04-20 |
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