CN112925031A - Metal positioning device and method - Google Patents
Metal positioning device and method Download PDFInfo
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- CN112925031A CN112925031A CN202110157945.4A CN202110157945A CN112925031A CN 112925031 A CN112925031 A CN 112925031A CN 202110157945 A CN202110157945 A CN 202110157945A CN 112925031 A CN112925031 A CN 112925031A
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- 239000002184 metal Substances 0.000 title claims abstract description 41
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- 230000003321 amplification Effects 0.000 claims abstract description 14
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- 230000004907 flux Effects 0.000 description 5
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- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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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
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Abstract
The application relates to the technical field of metal detection, in particular to a metal positioning device and method. The metal positioning device comprises a power supply module, a waveform generation circuit module, a transmitting coil, a receiving coil, a signal amplification module, a processor and a human-computer interaction module. The power supply module supplies power to each module, the waveform generation circuit module generates alternating voltage to be applied to the transmitting coil, and the transmitting coil transmits alternating electromagnetic waves; the receiving coil and the transmitting coil are intersected, and the receiving coil receives the electromagnetic waves transmitted by the transmitting coil to generate induced voltage; the signal amplification module amplifies the induction voltage received from the transmitting coil and then sends the amplified induction voltage to the processor; the processor processes the signal and outputs the processing result to the human-computer interaction module. The device enables the transmitting magnetic field and the receiving magnetic field to be coupled with each other by setting the receiving coil and the transmitting coil to be crossed, can realize the induction measurement of an object to be measured, can reduce the production cost, can simplify the debugging process, and improves the sensitivity and the accuracy of detection.
Description
Technical Field
The application relates to the technical field of metal detection, in particular to a metal positioning device and method.
Background
At present, a metal positioning device on the market is mainly realized through a magnetic field induction principle, alternating voltage is applied to two ends of a transmitting coil by main parts to transmit an alternating electromagnetic field to a space, and meanwhile, the receiving coils are different in realization modes and are usually arranged into a plurality of receiving coils. Under the condition that an object to be measured exists, the original magnetic field distribution can be changed, and therefore the receiving coil has induced voltage. In the existing technical scheme, at least two or more receiving coils are usually arranged, and the receiving coils and the transmitting coils are not coupled with each other, so that the production cost is increased, the initialization and debugging steps of the metal positioning device are complicated, and the detection sensitivity and accuracy are reduced.
Disclosure of Invention
One of the objectives of the present invention is to provide a metal positioning device, which uses only one receiving coil, and realizes the detection of metal objects by coupling the transmitting magnetic field and the receiving magnetic field and combining the faraday's law of electromagnetic induction, thereby reducing the production cost, simplifying the debugging process, and improving the sensitivity and accuracy of the detection.
In order to solve the technical problem, the invention provides a metal positioning device, which comprises a power supply module, a waveform generation circuit module, a transmitting coil, a receiving coil, a signal amplification module, a processor and a human-computer interaction module, wherein the power supply module is used for supplying power to the metal positioning device;
the power supply module is respectively electrically connected with the waveform generation circuit module, the signal amplification module, the processor and the human-computer interaction module and supplies power; the waveform generating circuit module is connected with the transmitting coil and used for generating alternating voltage and applying the alternating voltage to the transmitting coil; the transmitting coil is used for transmitting alternating electromagnetic waves; the number of the receiving coils is at least one, the receiving coils and the transmitting coils have overlapped intersection parts on a horizontal projection plane, so that magnetic field density lines of the receiving coils are intersected with magnetic field density lines of the transmitting coils, and the receiving coils are used for receiving electromagnetic waves transmitted by the transmitting coils and generating induced voltages; the signal amplification module is respectively electrically connected with the receiving coil and the processor and is used for amplifying the induction voltage received from the transmitting coil and then transmitting the amplified induction voltage to the processor; the processor is connected with the human-computer interaction module and used for processing signals and outputting processing results to the human-computer interaction module.
Furthermore, the metal positioning device further comprises a switch device, wherein the switch device is connected with the receiving coil and used for adjusting the number of turns of the receiving coil.
Further, the switching device is a mos tube or a triode.
Further, the processor model is STM32F030C8T 6.
Correspondingly, the invention also provides a method for positioning metal by adopting the metal positioning device, which is characterized by comprising the following steps:
and 3, when the metal positioning device is close to the object to be detected, if the object to be detected is metal, the initial electromagnetic field distribution condition can be changed, and the man-machine interaction module reads the current induced magnetic field strength value for analysis.
Different from the prior art, the technical scheme of the invention has the following beneficial effects:
1. the transmitting coil and the receiving coil of the metal detection device are intersected on the horizontal projection plane, so that the magnetic field density line of the receiving coil is intersected with the magnetic field density line of the transmitting coil, namely, the transmitting magnetic field and the receiving magnetic field are mutually coupled, and then the Faraday's law of electromagnetic induction is combined, so that the magnetic field induction measurement of the object to be measured can be realized. Compared with the prior art that the magnetic field induction measurement of the object to be measured can be realized only by at least one transmitting coil and more than two receiving coils, the method and the device can reduce production cost, simplify debugging process and improve detection sensitivity and accuracy.
2. The number of turns of the receiving coil is finely adjusted by arranging a switch device connected with the receiving coil, so that individual errors of magnetic field induction caused by installation position deviation of the transmitting coil and the receiving coil in the production process are counteracted.
Drawings
FIG. 1 is a view showing the structure of a metal positioning apparatus according to the present invention.
Fig. 2 is a schematic diagram of a transmitting coil and a receiving coil according to the present application.
Fig. 3 is a second schematic diagram of the transmitting coil and the receiving coil of the present application.
Fig. 4 is a circuit diagram of the metal positioning device of the present application.
FIG. 5 is a step diagram of the metal positioning method of the present application.
Wherein, 1 is a transmitting coil, 2 is a receiving coil, 3 is a switch device, 4 is a signal amplification module, and 5 is a processor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the structure diagram of the metal positioning device of the present application includes a power supply module, a waveform generation circuit module, a transmitting coil, a receiving coil, a signal amplification module, a processor and a human-computer interaction module;
the power supply module is respectively electrically connected with the waveform generation circuit module, the signal amplification module, the processor and the human-computer interaction module and supplies power to the modules.
The waveform generating circuit module is connected with the transmitting coil and used for generating and applying sine alternating voltage to the transmitting coil.
The transmitting coil is a group of coils wound clockwise or anticlockwise, and transmits alternating electromagnetic waves to generate an electromagnetic field after receiving a voltage which is applied by the waveform generating circuit module and generates sine alternation. Specifically, the transmitting coil may be a circle, an ellipse, a square or other shapes, and may be an external coil device or a coil manner designed on a PCB board.
As shown in fig. 2-3, the present invention is a schematic diagram of a transmitting coil and a receiving coil, in the present application, the receiving coil is also a set of coils wound clockwise or counterclockwise, the winding direction of the coil is the same as or opposite to the winding direction of the transmitting coil, at least one receiving coil is provided, and each receiving coil and the transmitting coil have an overlapping intersection portion on the horizontal projection plane, so that the magnetic field density lines of the receiving coil intersect with the magnetic field density lines of the transmitting coil, and the receiving coil is used for receiving the electromagnetic waves transmitted by the transmitting coil and generating induced voltages. Similarly, the receiving coil may be circular, oval, square or other shape, and may be an external coil device or a coil manner designed on a PCB board. In addition, the crossing portion of the transmitting coil and the receiving coil portion is not limited to the upper, lower, left, right or other directions, and the crossing area is not limited as long as the receiving coil crosses the magnetic field density line of the transmitting coil. Meanwhile, whether the transmitting coil and the receiving coil are in the same horizontal direction does not affect the implementation of the scheme.
The transmitting coil and the receiving coil of the metal detection device are intersected on the horizontal projection plane, so that the magnetic field density line of the receiving coil is intersected with the magnetic field density line of the transmitting coil, namely, the transmitting magnetic field and the receiving magnetic field are mutually coupled, and then the Faraday's law of electromagnetic induction is combined, so that the magnetic field induction measurement of the object to be measured can be realized. Compared with the mode that at least one transmitting coil and more than two receiving coils need to realize the magnetic field induction measurement of the object to be detected through mutual potential cancellation of two groups of receiving coils in the prior art, the method and the device can reduce production cost, simplify the debugging process and improve the detection sensitivity and accuracy.
The signal amplification module is respectively electrically connected with the receiving coil and the processor and is used for amplifying the induction voltage received from the transmitting coil and then transmitting the amplified induction voltage to the processor; because the voltage generated by the change of the induction magnetic field of the receiving coil is usually weak, the observation and the subsequent analysis are inconvenient, and the signal amplification module is required to amplify and then process the voltage.
The processor is connected with the human-computer interaction module and used for processing signals and outputting processing results to the human-computer interaction module, and the human-computer interaction module displays the induction intensity of the magnetic field. Preferably, the processor model is STM32F030C8T 6.
In a preferred embodiment, the metal positioning device described herein further includes a switch device, as shown in fig. 4, which is a circuit diagram of the metal positioning device of the present application. The switch device is connected with the receiving coil and used for adjusting the number of turns of the receiving coil, so that the magnetic flux of the receiving coil is changed to enable the total magnetic flux inside the receiving coil to be zero. In a specific embodiment, the switch device has a plurality of selectable starting points and end points, each starting point or end point corresponds to a position on the receiving coil, and the number of turns of the receiving coil is changed by selecting different starting points and end points to change the magnetic flux of the receiving coil. Generally, in the production process, the initial starting point and the end point can be recorded through a single chip microcomputer program and stored in a nonvolatile memory, fine adjustment is carried out through a switch device when initialization is used, individual errors of magnetic field induction caused by installation position deviation of a transmitting coil and a receiving coil in the production process can be offset, and the problem of product precision in batch production is solved. Preferably, the switching device is a mos tube or a triode.
As shown in fig. 5, the method for positioning metal by using the metal positioning apparatus of the present application includes the following steps:
And 2, adjusting the number of turns of the receiving coil through a switching device so as to change the magnetic flux of the receiving coil, and enabling the value of the current induced magnetic field strength read from the human-computer interaction module to be zero. And obtaining the magnetic field strength values of the display signals of the human-computer interaction module under different combinations by switching the combination of different starting points and ending points of the switch device, so that the minimum magnetic field strength value is basically close to zero, namely the magnetic flux inside the receiving coil is basically zero at the moment.
And 3, when the adjusted metal positioning device is close to the object to be detected, if the object to be detected is metal, the initial electromagnetic field distribution condition is changed, the original electromagnetic field balance is damaged, namely, the object to be detected generates another alternating field, the alternating field is transmitted to the receiving coil, induction voltage is generated in the receiving coil, and the man-machine interaction module can read the current induction magnetic field strength value to perform analysis and judgment according to the size.
The above embodiments are merely illustrative of the technical solutions of the present invention, and the present invention is not limited to the above embodiments, and any modifications or alterations according to the principles of the present invention should be within the protection scope of the present invention.
Claims (5)
1. A metal positioning device is characterized by comprising a power supply module, a waveform generation circuit module, a transmitting coil, a receiving coil, a signal amplification module, a processor and a human-computer interaction module;
the power supply module is respectively electrically connected with the waveform generation circuit module, the signal amplification module, the processor and the human-computer interaction module and supplies power; the waveform generating circuit module is connected with the transmitting coil and used for generating alternating voltage and applying the alternating voltage to the transmitting coil; the transmitting coil is used for transmitting alternating electromagnetic waves; the number of the receiving coils is at least one, the receiving coils and the transmitting coils have overlapped intersection parts on a horizontal projection plane, so that magnetic field density lines of the receiving coils are intersected with magnetic field density lines of the transmitting coils, and the receiving coils are used for receiving electromagnetic waves transmitted by the transmitting coils and generating induced voltages; the signal amplification module is respectively electrically connected with the receiving coil and the processor and is used for amplifying the induction voltage received from the transmitting coil and then transmitting the amplified induction voltage to the processor; the processor is connected with the human-computer interaction module and used for processing signals and outputting processing results to the human-computer interaction module.
2. The metal locator device of claim 1, further comprising a switching device coupled to the receiver coil for adjusting the number of turns of the receiver coil.
3. The metal locator of claim 2, wherein the switching device is a mos transistor or a triode.
4. The metal positioning apparatus of claim 1, wherein the processor model is STM32F030C8T 6.
5. A method for metal positioning using a metal positioning device according to claims 2-3, comprising the steps of:
step 1, under the condition that no metal is close to, driving the transmitting coil to generate an alternating magnetic field, and reading a current induced magnetic field strength value through the human-computer interaction module;
step 2, reading the current induced magnetic field intensity value from the human-computer interaction module to be zero by adjusting the switch device connected with the receiving coil;
and 3, when the metal positioning device is close to the object to be detected, if the object to be detected is metal, the initial electromagnetic field distribution condition can be changed, and the man-machine interaction module reads the current induced magnetic field strength value for analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157945.4A CN112925031A (en) | 2021-02-04 | 2021-02-04 | Metal positioning device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157945.4A CN112925031A (en) | 2021-02-04 | 2021-02-04 | Metal positioning device and method |
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| CN112925031A true CN112925031A (en) | 2021-06-08 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130154649A1 (en) * | 2011-12-19 | 2013-06-20 | Minelab Electronics Pty Limited | Transmit signal of a metal detector |
| US20130187476A1 (en) * | 2010-05-31 | 2013-07-25 | Fu Da Tong Technology Co., Ltd. | Inductive power supply system and intruding metal detection method thereof |
| CN204832544U (en) * | 2015-07-29 | 2015-12-02 | 金华马卡科技有限公司 | A metal sensor for location |
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
| CN107831547A (en) * | 2017-09-22 | 2018-03-23 | 永康市卓图工贸有限公司 | The method that a kind of metal detector and metal detector compensate to its detection coil |
| CN208654342U (en) * | 2018-07-31 | 2019-03-26 | 永康市卓图工贸有限公司 | A kind of metal detection sensor |
| CN111580173A (en) * | 2020-06-04 | 2020-08-25 | 山东大学 | Metal object detection sensor and detection device |
| CN111751890A (en) * | 2020-06-11 | 2020-10-09 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Land mine detection system and method capable of inhibiting background |
-
2021
- 2021-02-04 CN CN202110157945.4A patent/CN112925031A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130187476A1 (en) * | 2010-05-31 | 2013-07-25 | Fu Da Tong Technology Co., Ltd. | Inductive power supply system and intruding metal detection method thereof |
| US20130154649A1 (en) * | 2011-12-19 | 2013-06-20 | Minelab Electronics Pty Limited | Transmit signal of a metal detector |
| CN204832544U (en) * | 2015-07-29 | 2015-12-02 | 金华马卡科技有限公司 | A metal sensor for location |
| CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
| CN105182427A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Metal sensor |
| CN107831547A (en) * | 2017-09-22 | 2018-03-23 | 永康市卓图工贸有限公司 | The method that a kind of metal detector and metal detector compensate to its detection coil |
| CN208654342U (en) * | 2018-07-31 | 2019-03-26 | 永康市卓图工贸有限公司 | A kind of metal detection sensor |
| CN111580173A (en) * | 2020-06-04 | 2020-08-25 | 山东大学 | Metal object detection sensor and detection device |
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