EP0777292B1 - Antenneneinheit - Google Patents

Antenneneinheit Download PDF

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Publication number
EP0777292B1
EP0777292B1 EP96117893A EP96117893A EP0777292B1 EP 0777292 B1 EP0777292 B1 EP 0777292B1 EP 96117893 A EP96117893 A EP 96117893A EP 96117893 A EP96117893 A EP 96117893A EP 0777292 B1 EP0777292 B1 EP 0777292B1
Authority
EP
European Patent Office
Prior art keywords
antenna unit
antenna
unit according
arms
printed
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.)
Expired - Lifetime
Application number
EP96117893A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0777292A1 (de
Inventor
Horst Ziegler
Horst Behlen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to SI9630011T priority Critical patent/SI0777292T1/xx
Publication of EP0777292A1 publication Critical patent/EP0777292A1/de
Application granted granted Critical
Publication of EP0777292B1 publication Critical patent/EP0777292B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01Q1/2233—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 consumption-meter devices, e.g. electricity, gas or water meters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • the invention relates to an antenna unit, in particular for use in wireless remote reading of consumption meters, according to the preamble of claim 1.
  • Such an antenna unit is in EP-A-0 312 792 describe.
  • a slotted ring forms one Inductance, which is formed by a turn.
  • the Inductance is through a capacitive voltage divider connected to the two output terminals of a transmission circuit, the capacitors of the voltage divider by Stray capacities are formed, which between the slotted ring and a surrounding housing be formed.
  • US-A-3 852 758 has a radio buoy for retrieval given by cows.
  • This includes an antenna unit, which also serves as a collar for attaching the radio buoy on the neck of a cow.
  • the antenna unit includes two antenna arms that overlap in their end areas.
  • the two antenna arms form the secondary side a current transformer, which is also one of the Primary coil provided at the base of the antenna arms includes.
  • Another antenna unit is in EP-A-0 619 620 described a single curved antenna arm has at one end with the exit of a UHF broadcasting circuit is connected.
  • the present invention is intended to be an antenna unit improved according to the preamble of claim 1 that they are less in their work behavior sensitive to obstacles in their neighborhood responds.
  • the invention makes use of most of households in the vicinity of consumption meters set up differently from case to case Obstacles and also other in the neighborhood of Obstacles encountered by transmitting and / or receiving antennas Represent dielectrics. These have a stronger impact on the working behavior of such an antenna, which predominantly in the immediate vicinity of the antenna has alternating fields having electrical components.
  • the antenna unit according to the invention produces in an electromagnetic field in their immediate vicinity Alternating field with a predominantly magnetic component, and from for this reason the working behavior of the invention Antenna unit little by the usual near in consumption meters or other one Obstacles containing devices found antenna unit impaired.
  • the antenna unit according to the invention also works good in the neighborhood of large metal surfaces like them often in the immediate vicinity of consumption meters be found (meter housing for gas / electricity meters, Radiators and water pipes in the neighborhood of Heat meters).
  • An antenna unit according to the invention can also be clear less than a quarter of the wavelength for data transmission frequency bands used (200 to 1,000 MHz, in Europe mainly 433.92 MHz) are built, whereby it still has a good radiation efficiency, what allows the power requirement of the wirelessly readable Consumption meter can be kept small.
  • the latter is in view of that to operate the consumption meter used multi-year batteries for that entire calibration period, i.e. about five to twelve years, is sufficient should be an advantage.
  • An antenna unit according to the invention can be used Use advantage also in a receiver, e.g. in a central registration unit, which can be read out by radio Consumption meters works together. It guarantees at this application, due to its high quality, strong suppression from foreign transmitters without amplifier overdrive and good suppression of nonlinearities the harmonics caused by the transmitter, without separate Filter measures would be required.
  • An antenna unit according to the invention is suitable Because of the properties described above also good Transmit / receive antenna in bidirectional data transmission applications.
  • the antenna unit DC separated from the transmitter / receiver (Avoidance of potential and safety problems), and one can measure the inductance accordingly also an impedance matching at the same time to the connected transmitter / receiver, because typical radiation resistances of those of interest here Antennas are in the range of 30 to 200 mOhms, the typical ones Impedances of transmitters and receivers in the area of 50 ohms.
  • phase angle between the current in the feed inductance and the current in the antenna arms is one set the desired phase angle, in particular the phase angle 0.
  • the development of the invention according to claim 4 is used to optimize the adaptation of the antenna unit and transmitter or receiver and to compensate for Manufacturing tolerances.
  • An antenna unit as specified in claim 5 is very easy to make from electrically good conductive Pipe material by cutting and slitting individual ones Make rings.
  • the development of the invention is according to claim 6 with regard to the best possible management of the field lines in the gap between the ends of the antenna arms and with regard to low ohmic resistance of the antenna unit advantageous. Holding the field lines together is with regard to keeping repercussions small Obstacles to the working behavior of the antenna unit advantageous.
  • ohmic losses desirable: These can be for inventive Antenna units at a few mOhms or fractions thereof are much smaller than the radiation resistance typically from 30 to 200 mOhms. So you have in the antenna units according to the invention have a high circular quality from 100 to 1000. The latter is also with regard to the Suppression by a non-linear transmission circuit generated harmonics and harmonics by the antenna unit advantageous.
  • the development of the invention according to claim 7 allows a very simple manufacture of the antenna arms underneath Use of the known and inexpensive to carry out Technology of printed conductor tracks.
  • the thickness with conventional techniques of printed conductor tracks is sufficient with regard to the antenna effect, because the field at the frequencies in question here between 200 to 1,000 MHz in practice in Germany of 433.92 MHz only a few ⁇ m in the conductor track penetrates.
  • By dimensioning the width accordingly the trace is sufficiently small Resistance of the antenna arms in the range of a few mOhm.
  • About the geometry of the conductor track can be very simple way the radiation behavior of the antenna unit pretend. Typically are for radio remote reading of consumption meters clear dimensions of the antenna arm trace sufficient in the range of 50 x 50 mm.
  • Another advantage of the design of the antenna unit according to claim 7 is that one on the track supporting circuit board also additional other electronic Arrange and interconnect components that belong to the UHF transmitter or to connect the antenna unit belong to the UHF transmitter (or receiver).
  • the development of the invention according to claim 9 is in terms of good magnetic coupling between Food inductance and antenna arms are an advantage.
  • the development of the invention according to claim 15 allows it, about the location of the interruptions in the a capacitor plate forming interconnect capacitance of the termination capacitor simply on the completed antenna unit, e.g. by mechanically scratching or interrupting the conductor track using a laser.
  • An antenna unit as specified in claim 16 is well suited in connection with devices such as Consumption meters that are inherently cylindrical Have housings, e.g. Water clocks and the like, and can even a peripheral wall of the housing of the device form.
  • devices such as Consumption meters that are inherently cylindrical Have housings, e.g. Water clocks and the like, and can even a peripheral wall of the housing of the device form.
  • an antenna unit according to claim 17 one has a particularly good independence of the broadcasting ability or reception capacity from the present or not Presence of extensive metallic objects in the neighborhood the antenna unit.
  • metallic Shielding plate are in the behind the antenna arms defined half space created which are not then due to the presence of further obstacles be modified more significantly; the properties the shielding plate can already be designed take into account the antenna unit.
  • a temperature sensor 10 thermally to a heat consumer e.g. coupled a radiator.
  • the output signal of the Temperature sensor 10 is via an analog / digital converter 12 to the one input of a digital multiplier 14 given.
  • the second input of the multiplier 14 receives the output signal of a read-only memory 16, via a socket 18 with a for the heat output characteristic of the radiator characteristic Number can be described.
  • With a hot water meter can the second input of the multiplier 14 with connected to the output of a flow meter 20, as indicated by dashed lines.
  • the output signal of the multiplier 14 arrives to an integrating circuit 22.
  • the operating frequency of the Baud rate cycle (in practice 300-19200 baud) corresponds.
  • the output signal of the modulator 32 controls the modulation (AM or FM) of a UHF transmission circuit 34, whose basic working frequency in the range between 200 and 1,000 MHz is, in Europe usually at 433.92 MHz. Its exit is one with a total of 36 designated antenna unit connected.
  • the second connector the antenna unit 36 is connected to that at 38 indicated ground line of the transmission circuit 34 connected.
  • the antenna unit 36 comprises a feed inductance 40 and a series connected to this preferably adjustable capacity 42.
  • the LC circuit thus formed connects the two terminals of the antenna unit 36.
  • the antenna unit 36 can also be the center of two connected in series arm inductors 44, 45 be, as indicated by dashed lines; preferably however, the arm inductors become DC kept floating. These form two antenna arms spatially, which together form an essentially closed Form a ring.
  • any self-contained geometric structure be understood, not just circular rings. Includes ring thus closed polygons such as rectangles. Important for the present invention is that the antenna arm ring is not completely closed, rather on one Location that is the center of the connecting line between opposed to arm inductors 44, an interruption is present, which is bridged by a termination capacitance 46 is.
  • the antenna unit 36 works as compact inductive antenna, its dimensions are considerably smaller than the wavelength of the emitted electromagnetic waves (this is included 433 MHz at about 70 cm). In practice, good efficiency (20 to 70%) according to the present Invention realize antenna units, their dimensions in the range of one twentieth of the wavelength or is below. Details of practical embodiments of antenna unit 36 will be further referenced described on Figures 2 to 9.
  • the consumption meter according to FIG. 1 only transmits during selected very short periods of time within one Daily to the burden of operating the logical Components and power components needed Batteries, indicated schematically at 48 and 50 respectively over the calibration period of the consumption meter maintain what works in practice means over five to twelve years.
  • a statistically operating transmission time generator 52 determines a few stochastically throughout the day, e.g. four transmission windows, the duration of which in practice approximately Can be 10 ms. Details of such a transmission time generator are described in DE 42 25 042 A1, to which reference was made in full in this regard becomes.
  • the transmission time generator 52 At the beginning of one of the stochastically distributed transmission windows the transmission time generator 52 first activates the character chain, and after a short period of time, those for the composition of the meter reading and the Content of the read-only memory 28 is sufficient first signal provided on a control line 54 completed. Then the converter 30, the modulator 32 and the transmission circuit 34 by one on a second Control line 56 issued activation signal for the one required to send the entire string Time activated (typically 10 ms).
  • Figure 2 shows a first practical embodiment for an antenna unit 36.
  • a copper sleeve 60 is arranged on a printed circuit board, a narrow one at the point at the top of the drawing has continuous slot 62. This has in the Practice a fraction of a millimeter wide, e.g. 0.2 mm.
  • An insulating piece 64 is in the slot 62 made of a material that has a high dielectric constant with low dielectric loss factor and low temperature response of its dielectric properties having. In practice, the insulating piece e.g. consist of a thin sheet of insulating glass.
  • the copper sleeve 60 can have a diameter of 30 mm, a thickness of 3 mm and an axial dimension of 7 mm. Such a copper sleeve can be easily Cut a corresponding copper pipe will.
  • the slot 62 can be cut to length in the copper tube or after cutting to length in the copper sleeve will.
  • the insulating piece 64 made of glass is in Press fit between the walls of the slot 62 inserted.
  • the walls of the slot 62 form the Plates, the insulating piece 64 the dielectric of the termination capacitance 46, which is the free end of two Antenna arms 66, 68 bridged, the antenna arms 66, 68 through the two halves of the copper sleeve 60 are formed, which are on both sides of the through the slot 62 extending ring diameter.
  • the lowest point of the copper sleeve 60 in FIG. 2 is via a conductor 70 with flat conductor track 72 connected to the back of the circuit board 58 is provided and can be grounded, but not necessarily.
  • the flat conductor track 72 is symmetrical Two kinks lying on either side of the ring center line Shield conductor tracks 74, 76 and one on the center line shield conductor 78 lying in the antenna unit.
  • a printed capacitor plate 80 is provided in the area of the circuit board located at the bottom left in FIG. 2 58 in the rear side in FIG. 2 .
  • a printed capacitor plate 80 is provided in the area of the circuit board located at the bottom left in FIG. 2 58 is on the rear side in FIG. 2 .
  • the two printed Capacitor plates 80, 82 form together with the between section of the circuit board 58 lying on them capacitance 42 as dielectric.
  • the printed capacitor plate 80 stands with one End of a strip-shaped conductor track 84 in connection, the second end of which is connected to the ground conductor track 72 is. In this way, the conductor track 84 forms the feed inductance 40.
  • connection of the antenna unit 36 according to FIG. 2 the transmission circuit 34 thus takes place on the capacitor plate 82 and the ground conductor 72.
  • an enlarged head section 86 is provided, which the ends of the antenna arms 66, 68 still covered.
  • a printed circuit board 94 made of a material that is high Dielectric constant and low dielectric losses having.
  • a sheet material is e.g. a glass fiber fabric, which in a corresponding dielectric Embedded resin matrix with properties is.
  • Such special circuit board materials are commercially available.
  • the arm inductors 44 are of a rectangular contour comprising printed conductor track 96, which follows the edge of the circuit board 94 at a small distance and one in its upper horizontal trajectory Has break 98. The middle of the lower horizontal Conductor section is with a ground connection 100 connected. In this way, the conductor track 96 two C-shaped antenna arms 102, 104 in front.
  • a printed one strip-shaped capacitor plate 106 is provided, which with the upper free legs of the antenna arms 102, 104 escapes.
  • the capacitor plate 106 thus forms together with the end portions of the antenna arms 102, 104 and the intermediate portion of the circuit board 94 the terminating capacitance 46 as dielectric.
  • the size of the termination capacitance 46 can thereby be set that there are 106 interruptions in the capacitor plate 108, e.g. B by mechanical scribing or local evaporation using a laser.
  • the final capacity is coordinated 46 so that the symmetry of the termination capacitance 46 with respect the center line of the antenna unit 36 is maintained.
  • the two connecting lugs of the conductor track 110 are interrupted and by a mounted in the surface mounting Capacitor 112 or one attached by surface mounting Trimming resistor 114 bridges.
  • the condenser 112 corresponds to that designated 42 in FIG Capacity.
  • an antenna unit 36 as shown in 3 and 4 is shown, in large numbers can be manufactured inexpensively.
  • circuit board 94 made of normal circuit board material produced.
  • antenna arms 102, 104 On top of the free end sections antenna arms 102, 104 is a special one flat termination capacitor 116 soldered, which also is manufactured in printed circuit board technology.
  • the terminating capacitor comprises 116 a substrate plate 118 made of one material with high dielectric constant, low dielectric Loss factor and high temperature constancy of the above-mentioned dielectric properties is.
  • a material is under the type designation RO3000 from Rogers Corp. to acquire.
  • the substrate plate 118 carries one on its upper side Capacitor plate 120, the edge of which is on all sides of the edge the substrate plate 118 is spaced to avoid that when soldering the termination capacitor 116 to the Antenna arms 102, 104 due to excess solder unintentional contact to the capacitor plate 120 arises.
  • the substrate plate 118 On the bottom is the substrate plate 118 with two printed capacitor plate segments 122, 124 provided, at least the free space 126 between them is as large as the break 98, so that the magnetic properties of arm inductors still by the geometry of the antenna arms 102, 104 is specified.
  • capacitor plate segments 122, 124 continue closer to each other, so that then the free Room 126 also the effective distance between the ends of the antenna arms 102, 104.
  • the termination capacitor 116 can also be used somewhat asymmetrical on the ends of the antenna arms 102, Solder 104 so that the electrically effective distance between the antenna arms 102, 104 by one of the Arm ends and one of the capacitor plate segments specified is.
  • the embodiment of the antenna unit 36 according to the Figures 5 and 6 has the advantage that one continues compact structure and using circuit board technology receives a final capacity, whereby but only a small amount according to FIGS. 5 and 6 of the expensive material with good dielectric properties is needed.
  • Figure 8 shows a sleeve-shaped antenna unit from the basic idea of building the antenna unit 3 and 4 comes close.
  • a circuit board sleeve 132 which is made of a material with the above mentioned good dielectric properties, is an external conductor 134 with a Interruption 136 and an internal conductor track 138 applied.
  • the conductor 134 becomes at the interruption 136 opposite end connected to a ground line and again provides antenna arms 140, 142 while the inner conductor path 138 together with the antenna arms 140, 142 forms a closing capacity, the Extent of circumference given by interruptions 144 are, the location of which is chosen as needed.
  • an antenna unit can then be the mechanical of a peripheral wall of a cylindrical housing, e.g. a water clock.
  • FIG. 10 shows a consumption meter that can be read out by radio with remotely adjustable working characteristics, e.g. an electricity meter with switchable tariffs.
  • a sensor 146 gives one of those currently picked up by the consumer Performance corresponding count signal on a consumption cost calculation circuit 148.
  • the count signal can e.g. a Pulse train that you get by reading brands, on the eddy current measuring disc of the power meter are provided.
  • the computing circuit works e.g. so that it has one for each count pulse received number stored in a read-only memory 150 which corresponds to the elementary consumption corresponding to a counting pulse indicates (characteristic calibration variable of the digitally working Sensor 146), with a price of elementary consumption assigned cost signal multiplied, which it on a line 152 is transferred.
  • the product signal thus obtained becomes the content of a Cost storage 154 added. That standing in this The cost signal becomes wireless at stochastic intervals transmitted to a central accounting unit, similarly as already above with reference to FIG. 1 described.
  • the signal conversion, which is not in Figure 10 is shown in detail by a conversion circuit 156, which controls a UHF transmission circuit 158, which over a transmission / reception switch 160 with an antenna unit 36 is connected, which is similar to that of Figures 3 and 4.
  • the conductor track 110 designed and has similar to a rung ladder Holmbahnen 162, 164 and muntin rail connecting them 166.
  • the latter can with prepared breakpoints 168 may be provided, alternatively instead or additionally the spar lanes.
  • rung tracks 166 corresponds to the effective area of the food inductance averaged rung position. In the illustrated embodiment only the topmost of the rungs is interrupted, so that the effective area of food inductance that corresponds to what you would get with a lattice track, the one between the middle and the lower rung lies.
  • a receive output of the transmit / receive switch 160 is connected to the input of a demodulator 170. Of the bit stream output by this is converted by a converter 172 brought back in parallel format. The so obtained digital signal, which in the present case is the current one corresponds to the applicable tariff (price per elementary consumption), is provided on line 152.
  • the central meter reading and billing unit only from Costs to be paid to consumers. This are also known to the consumer, so in principle there is no need to send an invoice to the consumer can.
  • the consumption meter wireless counter reversal commands transmit, which cause the computing circuit 148 depending on the wireless command received, the consumption count in a specific one of a plurality of consumption memories to update that provided instead of the cost storage 154 are.
  • the meter readings are then used for billing of the various consumption memories to the central reading and billing unit transmitted.

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Burglar Alarm Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Structure Of Receivers (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Waveguide Aerials (AREA)
EP96117893A 1995-12-06 1996-11-08 Antenneneinheit Expired - Lifetime EP0777292B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9630011T SI0777292T1 (en) 1995-12-06 1996-11-08 Antenna unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545394A DE19545394A1 (de) 1995-12-06 1995-12-06 Antenneneinheit
DE19545394 1995-12-06

Publications (2)

Publication Number Publication Date
EP0777292A1 EP0777292A1 (de) 1997-06-04
EP0777292B1 true EP0777292B1 (de) 1998-06-10

Family

ID=7779266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117893A Expired - Lifetime EP0777292B1 (de) 1995-12-06 1996-11-08 Antenneneinheit

Country Status (10)

Country Link
EP (1) EP0777292B1 (sk)
AT (1) ATE167333T1 (sk)
CZ (1) CZ288642B6 (sk)
DE (2) DE19545394A1 (sk)
DK (1) DK0777292T3 (sk)
ES (1) ES2119540T3 (sk)
HU (1) HU221219B1 (sk)
PL (1) PL181957B1 (sk)
SI (1) SI0777292T1 (sk)
SK (1) SK155396A3 (sk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8441402B2 (en) 2009-02-06 2013-05-14 Wika Alexander Wiegand Gmbh & Co. Kg Measuring instrument

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6149470A (en) * 1999-02-26 2000-11-21 Berg Technology, Inc. Electrical connector for antenna or the like
DE19954579C5 (de) * 1999-11-12 2008-09-11 Techem Energy Services Gmbh Vorrichtung zur Erfassung des Energieverbrauchs einer Heizungsanlage
DE10004222A1 (de) * 2000-02-01 2001-06-21 Lear Automotive Electronics Gm Funk-Fernbedienungsgeber
DE10010936B4 (de) 2000-03-06 2006-11-02 Horst Prof. Dr. Ziegler Antenne

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US3852758A (en) * 1973-03-12 1974-12-03 J Polson Coupling method and device for animal mountable electronic package
US4661821A (en) * 1985-03-15 1987-04-28 General Electric Company Vandalism-resistant UHF antenna
US4847626A (en) * 1987-07-01 1989-07-11 Motorola, Inc. Microstrip balun-antenna
US4972198A (en) * 1987-08-31 1990-11-20 Monarch Marking Systems, Inc. Multiple loop antenna
FR2621179B1 (fr) * 1987-09-25 1990-01-19 Alcatel Thomson Radiotelephone Antenne pour recepteur miniature notamment pour recepteur en forme de boitier de montre
DE8814993U1 (de) * 1988-01-04 1989-03-02 Oppermann, Richard, 7762 Ludwigshafen Antenneneinheit, bestehend aus Antennenschleife, Kondensator und Ankopplung
US4853705A (en) * 1988-05-11 1989-08-01 Amtech Technology Corporation Beam powered antenna
JPH04321190A (ja) * 1991-04-22 1992-11-11 Mitsubishi Electric Corp 非接触型携帯記憶装置のアンテナ回路
DE4225042C2 (de) 1992-07-29 1996-10-17 Ziegler Horst Verfahren zum Übertragen von Verbrauchs-Meßdaten
DE4311591A1 (de) * 1993-04-08 1994-10-13 Kundo Systemtechnik Gmbh Verbrauchsverteiler, insbesondere Heizkosten- oder Warmwasserkostenverteiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8441402B2 (en) 2009-02-06 2013-05-14 Wika Alexander Wiegand Gmbh & Co. Kg Measuring instrument

Also Published As

Publication number Publication date
DE19545394A1 (de) 1997-06-12
HU221219B1 (en) 2002-08-28
PL181957B1 (pl) 2001-10-31
CZ357396A3 (en) 1997-06-11
DE59600272D1 (de) 1998-07-16
SK155396A3 (en) 1997-10-08
EP0777292A1 (de) 1997-06-04
DK0777292T3 (da) 1999-03-29
CZ288642B6 (cs) 2001-08-15
PL317306A1 (en) 1997-06-09
ES2119540T3 (es) 1998-10-01
HUP9603314A2 (en) 1997-11-28
HU9603314D0 (en) 1997-01-28
HUP9603314A3 (en) 1998-03-02
ATE167333T1 (de) 1998-06-15
SI0777292T1 (en) 1999-02-28

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