WO2017114109A1 - 一种自平衡降噪金属探测双线圈 - Google Patents

一种自平衡降噪金属探测双线圈 Download PDF

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Publication number
WO2017114109A1
WO2017114109A1 PCT/CN2016/108766 CN2016108766W WO2017114109A1 WO 2017114109 A1 WO2017114109 A1 WO 2017114109A1 CN 2016108766 W CN2016108766 W CN 2016108766W WO 2017114109 A1 WO2017114109 A1 WO 2017114109A1
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WO
WIPO (PCT)
Prior art keywords
induction
coil
coils
self
noise reduction
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Application number
PCT/CN2016/108766
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English (en)
French (fr)
Inventor
王兰
杜传涛
Original Assignee
深圳市澳亚迪电子设备有限公司
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Filing date
Publication date
Priority claimed from CN201521097066.3U external-priority patent/CN205539519U/zh
Priority claimed from CN201510989198.5A external-priority patent/CN105572750B/zh
Application filed by 深圳市澳亚迪电子设备有限公司 filed Critical 深圳市澳亚迪电子设备有限公司
Priority to US15/753,538 priority Critical patent/US10677952B2/en
Publication of WO2017114109A1 publication Critical patent/WO2017114109A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
    • G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements

Definitions

  • the invention relates to the field of metal detection, in particular to a self-balancing noise reduction metal detecting double coil.
  • the external large coil of the conventional metal detector is a magnetic field transmitting coil, and the inner small coil metal induction coil.
  • the voltage of the induction coil changes, and the voltage signal is amplified. Sampling and alarming, therefore, the induction coil is easily interfered by external electromagnetic interference, and the voltage balance of the induction coil needs to be compensated by the coil to adjust, so that the existing metal detector has a large workload, is resistant to electromagnetic interference, is prone to false alarms, and the induction coil It is separated, so there is a gap between adjacent induction coils, that is, there is a weak sensing area, which does not work properly when it encounters a complicated metal environment.
  • the present invention provides the following technical solutions:
  • a self-balancing noise reduction metal detecting double coil comprises a main magnetic field transmitting coil and a plurality of sets of induction coils, wherein the induction coil is composed of two identical induction single coils in series, and two inductive single coils are arranged in parallel and adjacent to each other.
  • the two sets of induction coils are arranged in an overlapping manner, and the plurality of sets of induction coils are disposed in the main magnetic field transmitting coil.
  • one of the two inductive single coils has an inductance of one single coil and a Q value of 1 to 2 times that of the other induced single coil.
  • the invention has the beneficial effects that the induction coil of the invention does not need to be adjusted, has strong anti-electromagnetic interference, is not easy to be false alarmed, does not have a weak sensing area, and can work normally in a complicated metal environment without interference, and
  • the structure is simple, easy to process, and can be mass produced.
  • 1 and 2 are schematic structural views of a conventional metal detecting coil.
  • 3 and 4 are schematic views of the structure of the present invention.
  • a self-balancing noise reduction metal detecting double coil includes a main magnetic field transmitting coil L and a plurality of sets of induction coils L1.
  • the induction coil L1 is composed of two inductive single coils La1 and induction having similar inductances and Q values.
  • the single coil Lb1 is composed in series, and the two inductive single coils are arranged in parallel in parallel, and the adjacent two sets of induction coils L1 are arranged in an overlapping manner, and the plurality of sets of induction coils L1 are disposed in the main magnetic field transmitting coil L.
  • the voltage obtained by the induction single coil La1 and the induced single coil Lb1 is subjected to a voltage difference.
  • the voltages obtained by the induction single coil La1 and the induction single coil Lb1 are almost the same, and the difference is not There will be a significant change. Only when the metal passes through the induction single coil La1 and then passes through the induction single coil Lb1, or passes through the induction single coil Lb1 and then the induced single coil La1, between the induction single coil La1 and the induction single coil Lb1. The voltage difference will be greatly changed. After the voltage signal is amplified and sampled, the metal can be accurately judged, and the inductor and the inductor are arranged in a crimping manner, and the sensing has no weak region.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

一种自平衡降噪金属探测双线圈，包括主磁场发射线圈（L）和多组感应线圈（L1），感应线圈（L1）由两个电感和Q值相近的感应单线圈（La1, Lb1）串联组成，且两个感应单线圈（La1, Lb1）并列平行设置，相邻的两组感应线圈（L1）进行重叠布置，多组感应线圈（L1）设置在主磁场发射线圈（L）内。该感应线圈无需调节，抗电磁干扰强，不易误报警，不存在弱感应区，在复杂的金属环境中能正常工作不受干扰，而且结构简单，易加工，能批量生产。

Description

一种自平衡降噪金属探测双线圈 技术领域
本发明涉及金属探测领域，具体是一种自平衡降噪金属探测双线圈。
背景技术
如图1和图2所示，传统的金属探测器的外部大线圈是磁场发射线圈，内部的小线圈金属感应线圈，当有金属靠近感应线圈时，感应线圈电压会发生变化，经过电压信号放大、采样并报警，因此感应线圈容易被外界电磁干扰，感应线圈的电压平衡需要补偿线圈来调整，因此使得现有的金属探测器的工作量大，抗电磁干扰差，容易误报警，而且感应线圈是分离设置的，因此相邻的感应线圈之间存在空白处，即存在弱感应区，当遇到周围复杂的金属环境时无法正常工作。
发明内容
本发明的目的在于提供一种自平衡降噪金属探测双线圈，以解决上述背景技术中提出的问题。
为实现上述目的，本发明提供如下技术方案：
一种自平衡降噪金属探测双线圈，包括主磁场发射线圈和多组感应线圈，所述感应线圈由两个相同的感应单线圈串联组成，且两额感应单线圈并列平行设置，相邻的两组感应线圈进行重叠布置，多组感应线圈均设置在主磁场发射线圈内。
作为本发明进一步的方案：两个感应单线圈中，其中的一个感应单线圈的电感和Q值为另一个感应单线圈的1～2倍。
与现有技术相比，本发明的有益效果是：本发明感应线圈无需调节，抗电磁干扰强，不易误报警，不存在弱感应区，在复杂的金属环境中能正常工作不受干扰，而且结构简单，易加工，能批量生产。
附图说明
图1和图2为传统金属探测线圈的结构示意图。
图3和图4为本发明的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图3～4，一种自平衡降噪金属探测双线圈，包括主磁场发射线圈L和多组感应线圈L1，感应线圈L1由两个电感和Q值相近的感应单线圈La1和感应单线圈Lb1串联组成，且两额感应单线圈并列平行设置，相邻的两组感应线圈L1进行重叠布置，多组感应线圈L1设置在主磁场发射线圈L内。
在同一磁场下，感应单线圈La1和感应单线圈Lb1得到的电压进行电压差，当外界电磁干扰时和复杂的金属环境，感应单线圈La1和感应单线圈Lb1得到的电压近乎一样，差量不会有明显变化，只有在检测时，金属经过感应单线圈La1再经过感应单线圈Lb1时，或者先经过感应单线圈Lb1再经过感应单线圈La1时，感应单线圈La1和感应单线圈Lb1之间的电压差才会有很大的变化，经过电压信号放大采样，就能准确的判断出金属，同时电感与电感采取压线式布置，感应无弱区。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。

Claims (2)

  1. 一种自平衡降噪金属探测双线圈，包括主磁场发射线圈和多组感应线圈，其特征在于，所述感应线圈由两个相同的感应单线圈串联组成，且两个感应单线圈并列平行设置，相邻的两组感应线圈进行重叠布置，多组感应线圈均设置在主磁场发射线圈内。
  2. 根据权利要求1所述的自平衡降噪金属探测双线圈，其特征在于，两个感应单线圈中，其中的一个感应单线圈的电感和Q值为另一个感应单线圈的1～2倍。
PCT/CN2016/108766 2015-12-28 2016-12-07 一种自平衡降噪金属探测双线圈 WO2017114109A1 (zh)

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US15/753,538 US10677952B2 (en) 2015-12-28 2016-12-07 Self-balance noise reduction metal detection double-coil

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CN201521097066.3U CN205539519U (zh) 2015-12-28 2015-12-28 一种自平衡降噪金属探测双线圈
CN201521097066.3 2015-12-28
CN201510989198.5 2015-12-28
CN201510989198.5A CN105572750B (zh) 2015-12-28 2015-12-28 一种自平衡降噪金属探测双线圈

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US20240078408A1 (en) * 2022-09-01 2024-03-07 Matthew Miller Metal detection system

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