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WO2016003328A1 - Capteur d'un détecteur de métaux et détecteur de métaux - Google Patents

Capteur d'un détecteur de métaux et détecteur de métaux Download PDF

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Publication number
WO2016003328A1
WO2016003328A1 PCT/RU2015/000414 RU2015000414W WO2016003328A1 WO 2016003328 A1 WO2016003328 A1 WO 2016003328A1 RU 2015000414 W RU2015000414 W RU 2015000414W WO 2016003328 A1 WO2016003328 A1 WO 2016003328A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal detector
inductor
capacitor
sensor
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/RU2015/000414
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English (en)
Russian (ru)
Inventor
Виктор Олегович АРБУЗОВ
Геннадий Львович ПОНОМАРЕВ
Алексей Сергеевич РЫБАКОВ
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
Priority claimed from RU2014126887/28A external-priority patent/RU2560246C1/ru
Priority claimed from RU2014126882/28A external-priority patent/RU2569639C1/ru
Application filed by Individual filed Critical Individual
Publication of WO2016003328A1 publication Critical patent/WO2016003328A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Definitions

  • the invention relates to the field of introscopy, more specifically to metal detectors, and can be used to solve the problem of detecting metal objects located in various covering environments, in particular, in weakly and highly mineralized soil, walls of buildings, etc.
  • metal detectors comprising metal detector sensors are known in the art.
  • D1 Known metal detector containing a metal detector sensor described in patent RU2360268 CI, G01V 3/11, 06/27/2009 (ARBUZOV V.O. and others) (D1).
  • the metal detector sensor known from D1 contains two different-sized blocks of coaxial coils, each of which consists of two series-connected transmitting (exciting) coils and one receiving (signal) coil. The transmitting coils are turned on in counter, which ensures the achievement of the induction balance - the minimum flux of induction through the receiving coils.
  • the well-known metal detector sensor is designed for dual-frequency operation.
  • a disadvantage of the metal detector sensor known from D1 is the complexity and low-tech design.
  • Known metal detector containing a metal detector sensor described in patent EP0764856 B1, G01V 3/10, G01V 3/11, 12/05/2001 (EBINGER KLAUS ING FA) (D2).
  • the metal detector sensor known from D2 has an annular housing with connecting ribs located along its middle and transverse axes and a transmitting coil wrapped around one or more receiving coils.
  • the housing has four straight sides of the same length and arranged in pairs in parallel. The isolation between the transmission and reception channels is ensured by the winding of the receiving coil (receiving coils) in a D-shape with a straight side along the center of the housing.
  • the disadvantage of the metal detector sensor known from D2 is the complexity and low-tech of its design, as well as the inability to operate the metal detector sensor in different modes.
  • Known metal detector containing a metal detector sensor described in application US2003107377 A1, G01V3 / 10, G01V3 / 11, 06/12/2003 (UZMAN MUSTAFA) (D3).
  • the metal detector sensor known from D3 is made D-shaped and has a coil consisting of transmitting and receiving windings located on a metal substrate, and the transmitting winding is located relative to the receiving winding so that the magnetic field generated by the transmitting winding induces only a very small voltage in the receiving winding.
  • the disadvantage of the metal detector sensor known from D3 is the complexity and low-tech design, as well as the impossibility of the metal detector in different modes.
  • the metal detector sensor known from D4 comprises a coil unit consisting of D-shaped receiving and transmitting coils. The coils are located on the same plane and are aligned in such a way that the induction flux of the transmitting coil passing through the winding of the receiving coil is minimal, as well as the output voltage on the winding of the receiving coil.
  • the disadvantage of the metal detector sensor known from D4 is the complexity and low-tech design, as well as the impossibility of the metal detector in different modes.
  • the metal detector sensor known from D4 can be adopted as a prototype of the claimed invention.
  • the solution closest in technical essence to the claimed invention is a metal detector, with the Koschey-DK27 ring-type metal detector sensor used in it (http://vash-ru.net md koshei / datchik dat-2.shtml) (D6) containing series-connected a first capacitor and a first drive coil parallel connected to a second signal coil and a second capacitor.
  • D6 the Koschey-DK27 ring-type metal detector sensor used in it (http://vash-ru.net md koshei / datchik dat-2.shtml)
  • D6 containing series-connected a first capacitor and a first drive coil parallel connected to a second signal coil and a second capacitor.
  • the free contact of the first capacitor is the input of the sensor excitation current
  • the free contact of the first coil is connected to a common point in the circuit.
  • the first point of parallel connection of the second signal coil with the second capacitor is the signal output of the sensor, and the second, similar point is connected to a common point
  • the coils are located on the same plane and partially aligned with the size of the alignment zone, which allows to achieve a minimum induction flux through the signal coil.
  • the coils are placed in one housing and are rigidly fixed, and the known sensor, as a rule, works in resonance modes at a fixed frequency along the exciting and signal circuits, while possessing good sensitivity, however, this solution does not allow it to use other operating frequencies at the same time.
  • the well-known from D6 sensor has low information content of signals, low quality of search performance, as well as narrow functionality.
  • the aim of the present invention is to provide a metal detector with improved operational properties, which can be used to solve a wide range of search problems.
  • the technical result achieved by the implementation of the present invention is to increase the sensitivity of the metal detector when operating simultaneously at different frequencies.
  • Another technical result is to increase the operational characteristics of the metal detector. Another technical result is the increased ergonomic TM use of the metal detector.
  • the metal detector comprises a generator, a metal detector sensor, a first quadrature component extraction unit (BVKS), a second BV C, a microprocessor and an indication unit, the metal detector sensor comprising in series a first capacitor C1 and an excitation inductor L1 connected in parallel a second signal inductor L2 and a second capacitor C2, and the free contact of the first capacitor O is the input of the excitation current of the first frequency of the sensor
  • the first contact of the signal inductor L2 is the first output of the metal detector sensor
  • the second contact of the signal inductor L2 is connected to a common point in the circuit, while the exciting inductor L1 and the signal inductor L2 are located on one
  • the metal detector is additionally equipped with a third inductor L3 and a third capacitor C3 connected in series moreover, the free contact of the third inductor L3 is connected to the input of the excitation current of the first frequency, the free contact of the third capacitor C ⁇ is connected to the midpoint of the series connection of the first capacitor C1 and the exciting inductor L1, while the metal detector is also additionally equipped with the fourth inductance L4 and the fourth capacitor C4 connected in series, while the free contact of the fourth coil L4 is connected to the first output of the metal detector sensor, free contact the fourth capacitor C4 is connected to a common point in the circuit, while the metal detector sensor is provided with a second output of the metal detector sensor, to the second is the midpoint of the series connection of the fourth inductor L4 and the fourth capacitor C4, while the metal detector sensor is
  • the exciting inductor L1 and the signal inductor L2 can be placed in one housing.
  • the exciting inductor L1 and the signal inductor L2 can be rigidly fixed.
  • the third and fourth inductors L3, L4 can be made with a magnetic circuit.
  • the third and fourth inductors L3, L4 can be placed in a separate housing outside the sensitivity zone of the exciting and signal inductors LI, L2.
  • the third and fourth inductors L3, L4 can also be placed in electromagnetic shields.
  • FIG. 1 illustrates an exemplary circuit diagram of a metal detector of the invention that can include a metal detector according to any one of the embodiments of the present invention.
  • FIG. 2 illustrates an exemplary design diagram of the inventive metal detector sensor.
  • the metal detector sensor comprises a first capacitor C1 and a drive inductor L1 connected in series, a second signal inductor L2 and a second capacitor C2 connected in parallel, the free contact of the first capacitor C1 being the input of the drive current of the first frequency of the metal detector, the first contact is a signal inductor L2 is the first output of the metal detector sensor, the second contact signal cat the inductor L2 is connected to a common point in the circuit, while the exciting inductor L1 and the signal inductor L2 are located on the same plane and partially aligned with each other with the size of the registration zone, so that the magnitude of the flux of induction through the signal inductor L2 produced the exciting inductor L1 was minimal, and the metal detector is additionally equipped with a third inductance coil L3 and a third capacitor connected in series 3, and the free contact of the third inductor L3 is connected to the input of the excitation current of the first frequency, the free contact of the third capacitor C3 is connected to
  • the metal detector comprises a generator, a metal detector sensor, a first quadrature component extraction unit (BVKS), a second BVKS, a microprocessor and an indication unit, the metal detector sensor comprising in series a first capacitor C1 and an excitation inductor L1 connected in parallel with a second signal an inductor L2 and a second capacitor C2, and the free contact of the first capacitor O is the input of the excitation current of the first frequency of the metal detector sensor, the first contact of the signal inductor L2 is the first output of the metal detector sensor, the second contact of the signal inductor L2 is connected to a common point in the circuit, while the excitation inductor L1 and the signal inductor L2 are located on the same plane and partially aligned with each other another with the magnitude of the alignment zone, selected so that the magnitude of the flux of induction through the signal inductor L2 produced by the exciting coil the inductance L1 was minimal, and the metal detector is additionally equipped with a third inductance coil
  • the drive inductor L1 and the signal inductor L2 are housed in one housing.
  • the drive inductor L1 and the signal inductor L2 are rigidly fixed.
  • the third and fourth inductors L3, L4 are made with a magnetic circuit.
  • the third and fourth inductors L3, L4 are placed in a separate housing outside the sensitivity zone of the exciting and signal inductors LI, L2.
  • the third and fourth inductors L3, L4 are placed in electromagnetic shields.
  • the metal detector 100 preferably comprises a generator 1010 controlled by microprocessor 1050, the first output being the output of the first frequency excitation current connected to the input of the first frequency excitation current of the sensor 1020 (indicated by a dotted frame) of the metal detector, the second output being the second frequency excitation current output connected to the current input the excitation of the second frequency of the sensor 1020 metal detector, while the sensor 1020 metal detector contains serially connected first capacitor C1 and the exciting coil nduktivnosti L1, parallel-connected second inductor L2 signal coil and a second capacitor C2, the free contact of the first capacitor C1 is input to the first frequency of the excitation current sensor 1020 metal detector, the first contact of the signal inductor L2 is the first output of the sensor 1020 metal detector, the second contact of the signal inductor L2 is connected to a common point
  • the first and second voltages at, respectively, the first and the second outputs of the metal detector sensor 1020 are complex quantities — vectors — which in Cartesian coordinates can be represented through projections (quadrature components). Signals with the values of the first and second voltages are fed to the inputs of the first BVKS 1030 and the second BVKS 1040, respectively.
  • the first (XI) and second (Y1) output signals of the first BVKS 1030 and the first (X2) and second (Y2) output signals of the second BVKS 1040 are fed to the inputs of the microprocessor 1050, where they are processed.
  • the display unit 1060 is made, for example, not limited to the possibility of outputting the processed signals in the form of hodographs of the first and second voltages. In FIG.
  • the claimed metal detector sensor 1020 comprises a first capacitor C1 and a drive inductor L1 connected in series, a second signal inductor L2 and a second capacitor C2 connected in parallel, the free contact of the first capacitor C1 being the input 1021 of the excitation current of the first frequency of the metal detector sensor 1020, the first contact of the signal inductor L2 is the first output 1023 of the metal detector sensor 1020, the second contact of the signal inductor L2 is connected to a common point circuits, while the exciting inductor L1 and the signal inductor L2 are located on the same plane and partially aligned with each other with the size of the alignment zone, selected so that the magnitude of the flux of induction through the signal inductor L2 produced by the exciting inductor L1 is minimal moreover, the sensor 1020 of the metal detector is additionally provided with a third inductance coil L3 and a third capacitor C3 connected in series, and the
  • the operation of the metal detector sensor 1020 can be considered by the example of its use as a part of the metal detector 100.
  • the metal detector 100 comprises a two-frequency generator 1010 supplying the first F1 and second F2 frequency with sinusoidal currents, the exciting circuits of the metal detector sensor 1020, the first and second outputs of the generator 1010 being connected to the corresponding inputs 1021, 1022 metal detector 1020 sensors.
  • the exciting part of the sensor 1020 metal detector It is a two-resonance system with two voltage resonances.
  • the frequency F1 should be significantly less than the frequency F2.
  • the size of the coincidence zone of the exciting inductor L1 and the signal inductor L2 is chosen so that the magnitude of the flux of induction through the signal inductor L2 produced by the exciting inductor L1 is minimal. This is necessary so that the metal detector sensor 1020 in the absence of a metal object in its sensitivity zone is inductively balanced and its output voltages are close to 0. When a metal object enters the sensitivity zone of the metal detector sensor 1020, the preferred input voltages appear at the respective outputs of the metal detector sensor 1020 U1 for frequency F1 (at the first output) and U2 for frequency F2 (at the second output).
  • Alternating voltages U1 and U2 are supplied to BVKS 1030 and BVKS 1040, respectively.
  • the output signals of BVKS 1030 and BVKS 1040 carry constant voltages, the magnitude of which is directly proportional to the projections of the vectors U1 and U2 into two mutually perpendicular directions.
  • Such projections are called the quadrature components of the sinusoidal signals, namely (XI, Y1) for the first frequency F1, and (X2, Y2) for the second frequency F2.
  • the quadrature components of both signals are introduced into the microprocessor 1050 and processed according to various mathematical algorithms, which allows to find the parameters of objects located in different covering environments from the signal parameters, i.e. make their identification.
  • the processing results are displayed on the display unit 1060, which may contain visual (e.g., not limited to, a display) and sound (e.g., not limited to, a power amplifier with a speaker) warning units.
  • visual e.g., not limited to, a display
  • sound e.g., not limited to, a power amplifier with a speaker
  • YU doubles, which allows a more comprehensive study of the reaction to an object at two different frequencies at once, which, based on the theory and practice of using the eddy current method, significantly increases the information content and identification capabilities of the sensor and improves its sensitivity when working at different frequencies and, accordingly, improves the performance of the metal detector as a whole.
  • Small and low conductive objects are better identified at high frequencies, and large highly conductive objects at low frequencies. Because of this, scanning a covering medium in a single-frequency mode will always be ineffective for a certain class of objects, which significantly reduces the functionality of single-frequency sensors and single-frequency metal detectors in general.
  • the proposed technical solution allows to minimize this disadvantage by maintaining an acceptable sensitivity to the entire spectrum of the desired objects.
  • the claimed sensor 1020 metal detector provides high sensitivity when working at different frequencies due to the use of resonances in the working coils.
  • the third and fourth inductors L3, L4 are preferably performed using a magnetic circuit, for example, not limited to ferrite.
  • the third and fourth inductors L3, L4 are preferably placed in a separate housing, outside the sensing zone of the working coils, for example, not limited to, behind the handle of the metal detector under the armrest.
  • said inductors L3, L4 are preferably located in electromagnetic shields.

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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne le domaine de l'introscopie et plus particulièrement des détecteurs de métaux et peut s'utiliser pour résoudre des problèmes liés aux tâches de détection de d'objets métalliques se trouvant dans des milieux d'obscurcissement, notamment dans des sols à minéralisation faible ou élevée, des murs de bâtiments, etc.
PCT/RU2015/000414 2014-07-02 2015-07-01 Capteur d'un détecteur de métaux et détecteur de métaux Ceased WO2016003328A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
RU2014126882 2014-07-02
RU2014126887/28A RU2560246C1 (ru) 2014-07-02 2014-07-02 Металлодетектор
RU2014126882/28A RU2569639C1 (ru) 2014-07-02 2014-07-02 Датчик металлодетектора
RU2014126887 2014-07-02

Publications (1)

Publication Number Publication Date
WO2016003328A1 true WO2016003328A1 (fr) 2016-01-07

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004801A1 (fr) * 1986-02-04 1987-08-13 Minelab Electronic Industries Ltd. Detection de metal dans des supports conducteurs utilisant un signal a double frequence
US6879161B2 (en) * 2002-02-11 2005-04-12 White's Electronics, Inc. Method and apparatus for distinguishing metal objects employing multiple frequency interrogation
RU2360268C1 (ru) * 2008-02-29 2009-06-27 Виктор Олегович Арбузов Вихретоковое устройство
US20090167299A1 (en) * 2004-06-04 2009-07-02 Anritsu Industrial Solutions Co., Ltd. Metal detection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004801A1 (fr) * 1986-02-04 1987-08-13 Minelab Electronic Industries Ltd. Detection de metal dans des supports conducteurs utilisant un signal a double frequence
US6879161B2 (en) * 2002-02-11 2005-04-12 White's Electronics, Inc. Method and apparatus for distinguishing metal objects employing multiple frequency interrogation
US20090167299A1 (en) * 2004-06-04 2009-07-02 Anritsu Industrial Solutions Co., Ltd. Metal detection device
RU2360268C1 (ru) * 2008-02-29 2009-06-27 Виктор Олегович Арбузов Вихретоковое устройство

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