WO2000034740A2 - Procede de radiolocalisation et moyens auxiliaires pour la mise en oeuvre de ce procede - Google Patents

Procede de radiolocalisation et moyens auxiliaires pour la mise en oeuvre de ce procede Download PDF

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Publication number
WO2000034740A2
WO2000034740A2 PCT/DE1999/003941 DE9903941W WO0034740A2 WO 2000034740 A2 WO2000034740 A2 WO 2000034740A2 DE 9903941 W DE9903941 W DE 9903941W WO 0034740 A2 WO0034740 A2 WO 0034740A2
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
transmitter
directional antenna
radio
measurement method
Prior art date
Application number
PCT/DE1999/003941
Other languages
German (de)
English (en)
Other versions
WO2000034740A3 (fr
Inventor
Christian Retzlaff
Uwe Meier
Original Assignee
KÖHLER, Bernhard
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
Priority claimed from DE29822065U external-priority patent/DE29822065U1/de
Application filed by KÖHLER, Bernhard filed Critical KÖHLER, Bernhard
Priority to DE19982645T priority Critical patent/DE19982645D2/de
Priority to AU25327/00A priority patent/AU2532700A/en
Publication of WO2000034740A2 publication Critical patent/WO2000034740A2/fr
Publication of WO2000034740A3 publication Critical patent/WO2000034740A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/065—Patch antenna array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means
    • G01C15/004—Reference lines, planes or sectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/02—Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns

Definitions

  • the invention relates to a radio measurement method to be carried out with at least one portable transmitter and one portable receiver, and to aids for carrying out the method.
  • the invention provides a transmitter, a receiver and a specially designed directional antenna.
  • Radio measurement methods in particular radio direction finding, are indispensable today, for example in the navigation of aircraft and ships. The same applies to the detection of objects by radar in order to determine their location, speed or motion vector.
  • Such a line of sight is also necessary for optical leveling devices, including those that work on a laser basis. If the line of sight is interrupted, for example by building walls, it is known from DE 37 01 514 to use deflecting prisms and sighting panels. This is also cumbersome and reduces the measuring accuracy again. In addition, several operators are regularly required.
  • the optical measuring devices mentioned also have the disadvantage that
  • Sun exposure or artificial light can reduce the quality of a measurement.
  • the task of the invention is to provide a measuring method that can be operated by a person, that does not require any connecting elements between a fixed point and a measuring point, and in particular also a measurement is possible if there is no line of sight between the fixed point and the measuring point, in particular if this line of sight is interrupted by massive, immovable objects.
  • the object is achieved by the radio measurement method according to claim 1, for which in particular a portable transmitter according to claim 12 and a mobile receiver according to claim 16 with directional antennas according to claim 26 are provided.
  • the radio measurement method it is set according to claim 1 that this is carried out with at least one portable transmitter and a mobile receiver, the at least one transmitter used stationary, emitting a sharply focused radio signal with a beam-like maximum via a directional antenna, in which the receiver is mobile used receives the radio signal via a receiving antenna system, the receiver has an evaluation device for registration and
  • the radio measurement method according to the invention offers a number of advantages. First of all, by using a wireless radio connection between a transmitter as a fixed point for the measuring method and a receiver as a measuring point, no line of sight between the reference point and the measuring point is necessary. At comparatively short distances, penetration of solid objects, for example from walls, floors or entire houses, is also possible without any problems, especially if the frequency used is greater than 400 MHz and is preferred within the ISM frequency band for approval reasons.
  • the transmitter or its directional antenna if this is designed to be removable from the transmitter, is aligned such that it is a fixed point for the mobile receiver at a measuring point represents. This is achieved by the measure that the transmitter emits a sharply focused radio signal which has a beam-like characteristic maximum in a certain direction.
  • the receiver or the receiving antenna system is aligned to this maximum. With this alignment to the maximum of the radio signal, the mobile receiver or its receiving antenna system is positioned on this imaginary connecting line.
  • the position of the mobile receiver can be determined exactly in relation thereto. Is e.g. If the height of the transmitter above a floor is defined as a reference plane, the height of the receiver above this floor can be determined if the radiation angle of the radio signal and the distance of the receiver from the emission location is known.
  • the transmitter and / or the emitted radio signal can be specified as a reference line by aligning the directional antenna in a special compass direction, which can be done, for example, by locating the transmitter or the directional antenna. A deviation of the receiver from this reference line can then be determined in angular degrees by twisting the transmitter or its directional antenna on the
  • Position of the receiving antenna system is measured.
  • a measurement plane in particular a horizontal measurement plane, is traversed by the maximum. If the axis and the direction of radiation of the radio signal are set at an angle of in particular less than 90 degrees, the measuring surface is a conical surface, the tip of which coincides with the directional antenna.
  • a horizontal measurement plane is used to measure flat, horizontal surfaces in the construction and finishing trade, particularly in house construction, but also in sewerage, road construction and the like, where heights have to be measured in relation to a reference plane.
  • the maximum is preferably registered by the evaluation device by evaluating received signals using an error minimization method. As a result, the maximum can be determined very precisely, with millimeter precision, and thus the position of the receiver or. the receiving antenna system.
  • the evaluation device compares two received signals of the radio signal received at a distance from one another and that by positioning the receiver or its receiver
  • Receiving antenna system if this is designed to be removable, the deviation of the received signals from each other can be minimized.
  • the maximum lies exactly in the middle between the two reception locations. If the two receiving locations do not include the maximum, the difference between the two signals will determine the direction towards the maximum, which if necessary. through the
  • Evaluation device can also be displayed. This shows an operator the way to position the receiver exactly on the maximum on the imaginary connecting line.
  • a sum and a difference signal of the received signals received at a distance from each other are formed and that the minimum of the ratio of the difference signal to the sum signal when positioning the receiver is shown.
  • This minimum of error stands for a maximum accurate positioning of the receiver relative to the maximum of the radio signal.
  • the difference signal can also be used for the evaluation device to determine the direction to the maximum from the deviation of the received signals received at a distance from one another and to indicate them, for example, by arrows on the display device.
  • a portable transmitter for a radio measurement method is further provided by the invention, in which according to claim 12 the focus is on the transmitter emitting a sharply focused radio signal of a frequency above 400 MHz via a directional antenna and that the transmitter and / or the directional antenna can be aligned with a reference point, a reference line and / or a reference plane.
  • the sender or the directional antenna can again be regarded as a fixed point with regard to the receiver or receivers.
  • Tripods or the like have devices for a northing, for example a compass, for an exact horizontal alignment, for example a hemispherical bubble or the like.
  • a graduated circular disk is expediently provided on a regular basis, so that the angle of rotation is easy to read, in particular about a vertical axis of the arrangement.
  • the transmitter or directional antenna can be rotatably mounted at home. Conveniently, especially at
  • the transmitter or the directional antenna can be rotated by a motor drive. Except for the manual setup of the transmitter as a fixed point for one or more receivers, the transmitter then requires no other operating personnel.
  • Claim 16 based on the fact that the receiver has an evaluation device for determining and displaying the maximum of the radio signal with a precise alignment of the receiving antenna system to a transmitter which emits the sharply focused radio signal.
  • the display optically and / or acoustically ensures that the receiver is actually exactly aligned with the transmitter as a reference point in the measuring process, or their antennas.
  • the receiver will be designed for reception at the frequency of the transmitter, preferably at a frequency above 400 MHz.
  • the receiver resp. whose antennas can be aligned with respect to a reference point, a reference line and / or a reference plane, so that further values are available for a measurement, which allow an exact calculation of angles, distances and the like.
  • the receiving antenna system of the receiver preferably has two directionally sensitive receiving antennas, the evaluation device compares the two received signals of the two receiving antennas and, with a minimal deviation of the received signals from one another, in particular with identical received signals, will display the maximum of the radio signal.
  • the receiver or the receiving antenna system such as the transmitter is expediently arranged on a measuring stick, a tripod or the like.
  • the receiver is a
  • the evaluation device forms a sum and a difference signal of the input signals. Sum and difference signals are excellent for error minimization processes. So the quotient shows
  • the receiver Since the preferred radio frequency is comparatively high above 400 MHz, it may be appropriate for the receiver to convert the high-frequency input signal (s) into signals of lower frequency and, if necessary. amplified for a further evaluation of these signals, on the basis of which a display device of the receiver preferably the maximum and / or the direction in which the receiver, if necessary. its receiving antenna system, for which reception of the maximum is to be moved.
  • a display device of the receiver preferably the maximum and / or the direction in which the receiver, if necessary. its receiving antenna system, for which reception of the maximum is to be moved.
  • Such a display can be visual and / or acoustic and facilitates the exact positioning of the receiver and its
  • a directional antenna which has a planar structure, in which at least four metallic or metallized surfaces in one in particular, has proven useful for transmitters and receivers rectangular, in particular square arrangement are applied to a planar, non-conductive support and are connected to one another by conductor tracks applied to the support.
  • the directional antenna according to the invention is capable of this with comparatively small spatial dimensions.
  • the dimensions of the flat carrier are essentially the size of an A4 format or smaller.
  • the surfaces emitting or receiving radio signals can be formed by metallic foils or the non-conductive carrier can be applied by applying powder if necessary. be metallized. The same applies to those on the
  • Carrier-applied conductor tracks that connect the metallic or metallized surfaces, also called patches, to one another.
  • the flat carrier can in particular be a printed circuit board laminated on both sides with a conductive material, a
  • the directional antenna for transmitting a sharply focused radio signal and the directional antenna for receiving a radio signal differ in detail, as will be explained in more detail below.
  • a directional antenna for emitting a sharply focused radio signal it is preferred that when the carrier is oriented vertically, two upper surfaces are connected on the underside by a conductor track, that two lower surfaces are connected on the underside by a conductor track, that the two conductor tracks are connected by a center between the Flat third conductor tracks are connected and that a fourth conductor track connected in the middle of the third conductor track is led to a connection on an edge of the carrier.
  • connection is expediently designed to be operationally separable, for example as a plug-in or screw connection of known coaxial connections. This allows the directional antenna to be easily separated from the actual transmitter. This is particularly advantageous if the transmitter itself is comparatively voluminous.
  • the directional antenna for receiving a radio signal has the peculiarity that two surfaces connected together form a receiving antenna. In this way, two antennas are made available for the receiver, at which reception signals are simultaneously present for evaluation. So that there are no interferences within the receiver due to longer lines and elements do not vibrate due to the high frequencies used, it is provided that the ratrace hybrid ring is arranged between the four surfaces, which is a sum and a
  • Ratrace hybrid ring Differential signal of the two received signals forms.
  • the connections between the Ratrace hybrid ring and the four patches can then be kept short.
  • the Ratrace hybrid ring can be etched out of a metallic coating on the carrier.
  • the support when the support is oriented vertically, it can be provided that two upper surfaces form a receiving antenna and two lower surfaces form a receiving antenna. With such an orientation, the height of the receiver or the directional antenna can be oriented precisely with respect to the maximum.
  • the interconnection of the patches of the directional antennas for the reception of radio signals is preferably of the shape that with a vertical orientation of the carrier the two upper surfaces are connected on the underside by a conductor track, that two lower surfaces are connected on the underside by a conductor track, that the two conductor tracks by a third and fourth, each connected to the center of the two conductor tracks, connected to the ratrace hybrid ring and that two further conductor tracks, connected to the ratrace hybrid ring, are each connected to an edge of the carrier.
  • These connections are also preferably operationally detachable in order to make the receiving antenna system, here consisting of two receiving antennas, detachable and self-aligning by the receiver itself.
  • Fig.l is a side view of a measuring station for
  • FIG. 8 is a plan view of a receiving antenna system according to the invention.
  • FIGS. 1 and 2 A leveling method according to the invention is explained in more detail with reference to FIGS. 1 and 2.
  • a house 1 is shown with rising house walls 2, which do not allow a direct connection between a fixed point 3 and a measuring point 4, for example for the use of a spirit level or an optical measuring device.
  • a stationary, but portable transmitter 5 is used as the fixed point 3, which emits a sharply focused radio signal with a beam-like maximum via a directional antenna 6, indicated by the Dashed line 7.
  • the transmitter 5, which is firmly combined with the directional antenna 6 here, is mounted on a tripod 8 in a manner known per se, the platform 9 of which can be aligned exactly horizontally, for example by means of a hemispherical bubble 10.
  • a likewise horizontally spanned measurement plane is formed by the beam 7. This provides a reference level for the measuring stations 4.
  • the platform 9 is expediently designed as a partial circle, so that angles alpha, beta and gamma, cf. Figure 2, can be measured between individual measuring points.
  • the transmitter 5, here firmly combined with the directional antenna 6, has a motor drive for a rotational movement about the axis 11.
  • the transmitter 5 can also be offset from the directional antenna 6, so that only the directional antenna 6 is aligned with a reference point, a reference surface or line.
  • the directional antenna is then connected to the actual transmitter via a cable and, in the case of a rotatable mounting, for example via a slip ring or the like.
  • an operator Given the task of determining an exact, relative position in relation to the floor 12 within the house 1, for example for the introduction of the marking for the top of a screed or the like, an operator will precisely determine a portable and mobile receiver 13 with its receiving antenna system the Align the maximum of the transmitted radio signal according to the dashed line 7. For this purpose, the receiver 13 knows one
  • Evaluation device which registers and displays the maximum. This will be discussed below.
  • an imaginary connection line between the transmitter 5 and the receiver 13, or their antennas is defined.
  • the position of the mobile receiver 13 has thus also been determined. This is because the receiving antenna system of the receiver 13 has the same relative height above the floor 12 as the transmitter 5 or the directional antenna 6.
  • the measuring plane can also be marked on the house wall 2, for example.
  • the height of an installation can then be determined, for example, by simple measurement.
  • the receiver can expediently be slidably mounted on a measuring staff 14, so that a relative height above the floor 12 can be indicated directly.
  • a measuring method is further explained with reference to FIG. 2, which allows the bearing orientation of individual measuring points such as corners 15 to 18 to one another to be checked or which serves to check the parallelism of walls 19, 20.
  • a transmitter 21 is arranged in the corner 15, for example.
  • the angle alpha can be determined by reading a partial circle on the platform 9 by rotating the transmitter 21 in the alignment with one or two receivers positioned in the corners 17 and 18.
  • the angles beta and gamma can also be determined. If, for example, the distance between corners 17 and 18 is measured further, the triangle spanned by corners 15 to 18 can be calculated without problems.
  • a repetition of this procedure with a transmitter / receiver in the corner 16 provides another triangle, so that from the determination of the height of the two triangles, namely the distance of the corners 15 and 16 from the wall 19, one can immediately see whether the walls 19 and 20 are also carried out in parallel and at a correct distance from one another.
  • Such a measuring method is naturally considerably simplified if the transmitter and receiver are combined. A change of location is then no longer necessary.
  • the calculations required for such measurements can also be carried out, for example, by a computer, in particular also a mobile laptop, to which the necessary measurement values can also be directly available in a known manner if the movable platforms of the transmitter or receiver are provided with electrical sensors and their output signals correspond to the relative position of a device.
  • FIG. 3 shows the basic circuit arrangement of the transmitter 5.
  • a transmission oscillator 25 generates in the usual way a radio signal in the microwave range, preferably above 400 MHz, which is emitted by a directional antenna 26 in a highly focused manner according to a characteristic 27.
  • the receiver 30, the block diagram of which is shown in FIG. 4, is designed as a zero-point monopulse system.
  • the receiving antenna system consisting of two directionally sensitive receiving antennas 31, 32 receives the radio signal of the transmitter and, indicated by the arrows, there are two received signals simultaneously
  • the two initial signals are added and subtracted in a sum / difference stage 33.
  • the sum / difference stage 33 is designed as a ratrace hybrid ring 34.
  • a high-frequency sum S and difference signal D are available.
  • These high-frequency signals are amplified in a downstream stage 35 and converted to a lower frequency, indicated by conventional block diagrams.
  • the receiver according to the invention further has one
  • Evaluation device 36 This serves to determine and display the maximum of the radio signal with a precise alignment of the receiving antenna system, here consisting of the receiving antennas 31 and 32, on a transmitter which emits a sharply focused radio signal, through which
  • Characteristic 37 indicated.
  • the quotient D / S is formed from the difference signal D and the sum signal S for the evaluation. With optimal alignment to the maximum, this quotient is minimal. This is indicated, optically and / or acoustically, via a display device 38.
  • the sum signal S and the difference signal D are available simultaneously. These signals include characteristics 37, 39 and 40.
  • Sum signal corresponding to characteristic 37, is referred to as a sum diagram. This is a focused diagram.
  • the characteristics 39 and 40 give the reception diagram of the difference signal D as a difference diagram again.
  • the signal D / S will only be minimal, ideally equal to zero, if the receiver 30 is aligned exactly with the receiving antennas 31 and 32 on the line 41 with millimeter precision. If the receiver 30 is aligned with the line 42, the signal D / S is different from zero, but is regularly greater than a predefinable tolerance threshold. It can be considered that the difference signal is not only available in terms of amount, but that a difference is actually formed, for example, between the received signal from antenna 31 and the received signal from antenna 32. Such a difference signal would be negative if aligned with line 42. If the receiver 30 is aligned to a line below the line 41, the difference would be positive. The direction of the maximum of the radio signal can be deduced from this and this direction can also be displayed on the display device 38 in a simple manner by querying the sign of the difference signal.
  • FIGS. 6 and 7 show a directional antenna in a vertical orientation for the transmission of a sharply focused radio signal.
  • the directional antenna 45 consists of a flat carrier 46 made of a non-conductive material.
  • a square arrangement of metallic surfaces 47 to 50 so-called patches, is applied to the carrier and connected to one another by conductor tracks 51 to 53.
  • a square arrangement of the metallic surfaces 47 to 50 is shown, because a square arrangement lends itself to four patches for reasons of symmetry.
  • this geometry is not mandatory, especially not if more than four metallic surfaces are provided.
  • FIG. 7 shows a section along the line VII in FIG. 6, the layer thicknesses of the areas 47 to 50 and that of the conductor tracks 51 to 53 being exaggerated for illustration.
  • the section according to FIG. 7 shows that the back of the flat carrier 46 is also provided with a conductive coating 54.
  • These metallic surfaces and conductor tracks can expediently be etched out of a circuit board laminated on both sides with a conductive material.
  • the two upper metallic surfaces 47, 48 are connected on the underside by the conductor track 51.
  • the metallic surfaces 49, 50 are connected on the underside by a conductor track 53.
  • the two conductor tracks 51 and 53 are further connected in the center by the conductor track 52, which runs centrally between the surfaces 49 and 50 and —in extension — 48 and 47.
  • a fourth conductor track 55 is guided here in the middle at the edge 57 to an operationally separable connection 56.
  • Such connections can, for example, known coaxial plug and
  • FIGS. 8 and 9 show a directional antenna for receiving a radio signal with a planar structure comparable to the directional antenna according to FIGS. 6 and 7 with a conductive rear coating 75.
  • a receiving antenna system 60 in the vertical orientation of the carrier 61 shown, the two upper metallic surfaces 62, 63 and the two lower surfaces 64, 65 are each interconnected to form a receiving antenna.
  • the two upper surfaces 62, 63 are connected on the underside by a conductor track 66 and the two lower surfaces 64, 65 on the underside by a second conductor track 67.
  • a third and fourth conductor track 68, 69 connect centrally to the conductor tracks 66, 67 and connect them to a ratrace hybrid ring 70 arranged centrally between the four surfaces 62 to 65.
  • the ratrace hybrid ring 70 forms a difference signal and a sum signal of the reception signals of the two reception antennas, each consisting of two metallic surfaces 62, 63 and 64, 65.
  • the sum signal S and the difference signal D are then present via conductor tracks 71, 72 Connections 73, 74 that can be released during operation are available for further evaluation.
  • transmitters, receivers and antennas or antenna systems are often found as synonyms recognizable from the description.

Abstract

L'invention concerne un procédé de radiolocalisation et les moyens auxiliaires permettant sa mise en oeuvre, à savoir au moins un émetteur transportable et un récepteur transportable. Selon ledit procédé, un signal radio distinctement mis en faisceau, présentant un maximum du type rayon, est émis par le ou les émetteurs (5) utilisés de façon fixe, par l'intermédiaire d'une antenne directionnelle (6), ce faisceau étant reçu par le récepteur (4) utilisé de façon mobile, par l'intermédiaire d'une installation d'antenne de réception. Le récepteur comporte en outre un dispositif d'évaluation servant à l'enregistrement et à l'indication du maximum sur lequel l'installation d'antenne du récepteur est dirigée, de telle sorte qu'une ligne de liaison imaginaire (7) est établie entre l'émetteur (6) et l'installation d'antenne de réception ou le récepteur (4). Sur la base de cette ligne de liaison se fait ensuite une détermination de la position du récepteur mobile (4) ou de son installation d'antenne de réception.
PCT/DE1999/003941 1998-12-10 1999-12-09 Procede de radiolocalisation et moyens auxiliaires pour la mise en oeuvre de ce procede WO2000034740A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19982645T DE19982645D2 (de) 1998-12-10 1999-12-09 Funkmeßverfahren und Hilfsmittel zur Durchführung des Verfahrens
AU25327/00A AU2532700A (en) 1998-12-10 1999-12-09 Radio measuring method and auxiliary means for carrying out said method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29822065.2 1998-12-10
DE29822065U DE29822065U1 (de) 1998-12-10 1998-12-10 Gerät zum Messen einer waagerechten und lotrechten Fläche durch Wände
DE19924208A DE19924208A1 (de) 1998-12-10 1999-05-27 Funkmeßverfahren und Hilfsmittel zur Durchführung des Verfahrens
DE19924208.9 1999-05-27

Publications (2)

Publication Number Publication Date
WO2000034740A2 true WO2000034740A2 (fr) 2000-06-15
WO2000034740A3 WO2000034740A3 (fr) 2000-12-07

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PCT/DE1999/003941 WO2000034740A2 (fr) 1998-12-10 1999-12-09 Procede de radiolocalisation et moyens auxiliaires pour la mise en oeuvre de ce procede

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AU (1) AU2532700A (fr)
DE (1) DE19982645D2 (fr)
WO (1) WO2000034740A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109730923B (zh) * 2019-03-04 2021-02-19 黑龙江中医药大学 辅助耳穴压籽的耳部穴位自动定位装置、定位系统及定位方法

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4820041A (en) * 1986-11-12 1989-04-11 Agtek Development Co., Inc. Position sensing system for surveying and grading

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JPS62288510A (ja) * 1986-06-09 1987-12-15 Nippon Kokan Kk <Nkk> 位置合せ装置
JP2534935B2 (ja) * 1990-11-30 1996-09-18 株式会社フジタ 簡易無線機の軸合せ装置

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Publication number Priority date Publication date Assignee Title
US4820041A (en) * 1986-11-12 1989-04-11 Agtek Development Co., Inc. Position sensing system for surveying and grading

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Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 178 (P-708), 26. Mai 1988 (1988-05-26) & JP 62 288510 A (NIPPON KOKAN KK), 15. Dezember 1987 (1987-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 550 (E-1292), 19. November 1992 (1992-11-19) & JP 04 208722 A (FUJITA CORP), 30. Juli 1992 (1992-07-30) *
SHERMAN S M: "MONOPULSE PRINCIPLES AND TECHNIQUES" 1984 , US,DEDHAM, ARTECH HOUSE INC, PAGE(S) 11,12,47-49,69,70,192,193 XP002137646 Abbildungen 1.3-4, 4.4-2, 7.16-1 Gleichung (3.1-7) Abschnitt "Hybrid Ring ("Rat Race") Junction", Seite 69 - Seite 70 Seite 47 -Seite 49 Seite 192 -Seite 193 *

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AU2532700A (en) 2000-06-26
DE19982645D2 (de) 2002-01-31
WO2000034740A3 (fr) 2000-12-07

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