CN113189655A - High anti-interference multichannel metal detection instrument - Google Patents
High anti-interference multichannel metal detection instrument Download PDFInfo
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- CN113189655A CN113189655A CN202110478799.5A CN202110478799A CN113189655A CN 113189655 A CN113189655 A CN 113189655A CN 202110478799 A CN202110478799 A CN 202110478799A CN 113189655 A CN113189655 A CN 113189655A
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 230000006698 induction Effects 0.000 claims abstract description 93
- 230000000712 assembly Effects 0.000 claims abstract description 13
- 238000000429 assembly Methods 0.000 claims abstract description 13
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 230000004044 response Effects 0.000 abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004753 textile Substances 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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- General Life Sciences & Earth Sciences (AREA)
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- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to the technical field of metal detection equipment, in particular to a high-interference-resistance multi-channel metal detection instrument, which comprises an equipment shell, an induction assembly and a non-metal baffle plate, wherein the equipment shell is provided with a plurality of sensing assemblies; the pay-off conveyer belt has been placed in the measuring channel, the interval is provided with the target detection thing on the pay-off conveyer belt, be provided with the two liang induction component that correspond of a plurality of groups on the same terminal surface of equipment casing, form the response channel between the adjacent induction component, when the thing of being examined passes through a certain induction component, the response electromotive force of that induction component will increase, thereby obtain the signal of will, if when the measured object passes through the centre of two induction components, the electromotive force that so other two sets of induction component sensed can equal and the polarity is the same, finally, two sets of induction component obtain different response electromotive force, access circuit board, obtain required signal after the operation, do the difference with adjacent channel, the purpose is for higher anti common mode ability, the interference killing feature is improved, sensitivity has been improved.
Description
Technical Field
The invention relates to the technical field of metal detection equipment, in particular to a high-interference-resistance multi-channel metal detection instrument.
Background
The metal detection instrument is generally applied to the fields of textiles, clothes, food and the like, the detection modes are mainly electromagnetic and magnetic induction, and the magnetic induction type manufacturing cost is low, so that the metal detection instrument has no substitution particularly in the detection of aluminum foil packages, and has wide application.
However, the magnetic induction type metal detection instrument is passive signal detection, is greatly influenced by the environment, and has poor anti-interference capability, and the existing magnetic induction type metal detection with the gantry structure can be realized by generally arranging a coil at the lower part and a magnet at the upper part, but the contrary is also possible. One or more coils are connected together to form a channel, the coils are arranged side by side to form N channels, and the purpose of the multiple channels is to improve the sensitivity and judge the position. When the object to be detected passes through the doorway, electromotive forces are induced on different coils, and the object to be detected can be detected after the coils are connected with an amplifier. Because each coil of the structure can induce small interference electromotive force under the action of vibration and an environmental magnetic field when no measured object passes through, the interference signal is large, and the sensitivity is low.
Disclosure of Invention
The invention aims to provide a high-interference-resistance multi-channel metal detection instrument to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high anti-interference multi-channel metal detection instrument comprises an equipment shell, an induction assembly and a non-metal baffle; a detection channel is arranged in the equipment shell, a plurality of corresponding mounting grooves are arranged at the upper end and the lower end in the equipment shell, and an induction assembly is fixed in each mounting groove; the induction assembly comprises magnetic steel and an induction coil, the magnetic steel sleeve is arranged in the induction coil, and the induction assembly is fixed at the end part of the equipment shell through a screw; the upper end and the lower end of the detection channel are provided with induction open slots, nonmetal baffles are arranged at the induction open slots, and the induction assemblies are correspondingly arranged above the nonmetal baffles; the induction assembly is connected to the wiring port through a connecting lead, and the wiring port is arranged on the side edge of the bottom of the equipment shell and is connected to the circuit board through the wiring port; the circuit board is provided with preamplifiers and differential amplifiers, the sensing assembly is electrically connected to the preamplifiers through connecting wires, each group of preamplifiers is connected to the differential amplifiers, and the output ends of the differential amplifiers are connected to the electronic switch; the electronic switch is connected to the gain amplifier, the gain amplifier is connected to the single chip microcomputer, and the single chip microcomputer is connected with the sound alarm module, the position prompt module, the liquid crystal display module and the motor control module.
Preferably, the induction assembly comprises magnetic steel and an induction coil, the magnetic steel is of a cylindrical structure, and the induction coil is correspondingly sleeved inside the magnetic steel.
Preferably, a plurality of groups of induction assemblies corresponding to each other are arranged on the same end face of the equipment shell, and induction channels are formed between adjacent induction assemblies.
Preferably, the circuit board is an external circuit board and can also be fixedly installed on the equipment shell.
Preferably, the detection channel and the equipment shell are of an integrally formed structure, and the equipment shell is of a gantry type rectangular structure.
Preferably, a feeding conveyor belt is placed in the detection channel, and target detection objects are arranged on the feeding conveyor belt at intervals.
Compared with the prior art, the invention has the beneficial effects that: the pay-off conveyer belt has been placed in the measuring channel, the interval is provided with the target detection thing on the pay-off conveyer belt, be provided with the two liang induction component that correspond of a plurality of groups on the same terminal surface of equipment casing, form the response channel between the adjacent induction component, when the thing of being examined passes through a certain induction component, the response electromotive force of that induction component will increase, thereby obtain the signal of will, if when the measured object passes through the centre of two induction components, the electromotive force that so other two sets of induction component sensed can equal and the polarity is the same, finally, two sets of induction component obtain different response electromotive force, access circuit board, obtain required signal after the operation, do the difference with adjacent channel, the purpose is for higher anti common mode ability, the interference killing feature is improved, sensitivity has been improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the internal structure of the apparatus of the present invention;
FIG. 3 is a schematic diagram of the sensing assembly of the present invention;
FIG. 4 is a schematic diagram of the sensing assembly of the present invention;
FIG. 5 is a circuit diagram of a circuit board according to the present invention;
FIG. 6 is a schematic diagram of a motor control module of the present invention;
FIG. 7 is a schematic view of a liquid crystal display module according to the present invention;
FIG. 8 is a schematic diagram of a location hint module of the present invention;
FIG. 9 is a schematic diagram of the circuit connection of the single chip microcomputer according to the present invention.
In the figure: 1. an equipment housing; 2. a detection channel; 3. an inductive component; 31. magnetic steel; 32. an induction coil; 4. a non-metallic baffle; 5. a wiring port; 6. a circuit board; 7. a preamplifier; 8. a differential amplifier; 9. an electronic switch; 10. a gain amplifier; 11. a single chip microcomputer; 12. a sound alarm module; 13. a position prompt module; 14. a liquid crystal display module; 15. a motor control module.
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.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-9, the present invention provides a technical solution: a high anti-interference multi-channel metal detection instrument comprises an equipment shell 1, an induction component 3 and a non-metal baffle 4; a detection channel 2 is arranged in the equipment shell 1, a plurality of corresponding mounting grooves are arranged at the upper end and the lower end in the equipment shell 1, and an induction component 3 is fixed in each mounting groove; the induction component 3 comprises a magnetic steel 31 and an induction coil 32, the magnetic steel 31 is sleeved in the induction coil 32, and the induction component 3 is fixed at the end part of the equipment shell 1 through a screw; induction open slots are formed in the upper end and the lower end of the detection channel 2, a nonmetal baffle 4 is arranged at the induction open slots, and the induction assemblies 3 are correspondingly arranged above the nonmetal baffle 4; the induction component 3 is connected to a wiring port 5 through a connecting lead, the wiring port 5 is arranged on the side edge of the bottom of the equipment shell 1 and is connected to a circuit board 6 through the wiring port 5; the circuit board 6 is provided with a preamplifier 7 and a differential amplifier 8, the induction component 3 is electrically connected to the preamplifiers 7 through a connecting lead, each group of preamplifiers 7 is connected to the differential amplifier 8, and the output end of the differential amplifier 8 is connected to an electronic switch 9; the electronic switch 9 is connected to a gain amplifier 10, the gain amplifier 10 is connected to a single chip microcomputer 11, and the single chip microcomputer 11 is connected with a sound alarm module 12, a position prompt module 13, a liquid crystal display module 14 and a motor control module 15.
Further, the induction component 3 includes a magnetic steel 31 and an induction coil 32, the magnetic steel 31 is a cylinder structure, and the induction coil 32 is correspondingly sleeved inside the magnetic steel 31.
Furthermore, a plurality of groups of induction assemblies 3 corresponding to each other are arranged on the same end face of the equipment shell 1, and induction channels are formed between the adjacent induction assemblies 3.
Further, the circuit board 6 is an external circuit board, and can also be fixedly mounted on the device housing 1.
Furthermore, the detection channel 2 and the equipment shell 1 are of an integrally formed structure, and the equipment shell 1 forms a gantry type rectangular structure.
Furthermore, a feeding conveyor belt is arranged in the detection channel 2, and target detection objects are arranged on the feeding conveyor belt at intervals.
The working principle is as follows: .
The detection channel 2 and the equipment shell 1 are of an integrated structure, the equipment shell 1 is of a gantry type rectangular structure, a feeding conveyor belt is placed in the detection channel 2, target detection objects are arranged on the feeding conveyor belt at intervals, a plurality of groups of induction assemblies 3 corresponding to each other in pairs are arranged on the same end face of the equipment shell 1, an induction channel is formed between every two adjacent induction assemblies 3, the upper magnetic field and the lower magnetic field form an attraction mode, the upper magnetic field and the lower magnetic field form a north, the lower magnetic field or the upper magnetic field and the lower magnetic field form a north, namely, the magnetic force lines are in a vertical mode, at least two induction assemblies 3 (even number) in each channel are arranged in a front-back crossed mode, and the reference picture 3 is shown in the drawing.
At present, the minimum induction component 3 is used for explaining that 2 induction components 3 are arranged at the upper end of a detection channel 2 and are staggered and arranged front and back, the lower end of the detection channel 2 is also arranged similarly, the two induction components 3 at the upper end and the lower end are connected in series reversely, but the upper wiring and the lower wiring are different, if the induction components 31 and 2A + at the upper end are connected together, the induction components 3B-at the lower end are connected together, the wire outlet back 1 is connected with the wire outlet 1, the wire outlet 2 is connected with the wire outlet 2, the wire outlet can be connected with the wire upper wiring and the wire outlet down in the same way, the two ends of the wire outlet are respectively connected with the wire outlet 1 and the wire outlet 2 in parallel and are connected reversely, so that the static induced electromotive forces generated up and down are opposite and are connected in parallel to offset each other. In fig. 3, the inductive elements 1 and 2 of the inductive element 3 are connected in series in opposite directions, and the induced electromotive forces to the interference signals in the vertical direction are equal in magnitude and opposite in polarity, and cancel each other out. Two sets of response subassembly 3 are parallelly connected together, and the electromotive force size that produces horizontal interference is equal, and polarity is opposite, offsets each other to the interference resistance ability to external world is strong, and is very stable, but to the testee, earlier through preceding response subassembly 3, this response subassembly 3 earlier induction electromotive force so, the useful electromotive force of following response subassembly 3 can not be got, two response subassemblies 3 can not offset, thereby produce useful induction signal, obtain the result after being enlargied by the circuit board.
In order to further improve the anti-interference capability of the whole detection instrument, the induction component 3 is matched with the circuit board 6, the induced electromotive force obtained by each channel is firstly connected into the respective preamplifier 7 and then connected into the differential amplifier 8, each differential amplifier 8 is connected with two adjacent channels, the differential amplifier 8 is connected with the electronic switch 9 controlled by the singlechip 11, the induced electromotive forces are switched in a time-sharing mode and then are transmitted to the gain amplifier 10, the induced electromotive force of each channel is obtained by the ADC in the singlechip 11, and position display, sound alarm, motor control and the like are realized through internal operation.
Referring to fig. 4, taking the lower sensing element 3 as an example, a row has N channels, and here, two channels of 4 sensing elements 3 are illustrated, the sensing elements 31 and 2 are first channels, and two channels 3 and 4 are adjacent to each other, the two sensing elements 3 of each channel are arranged in a cross manner, and the upper sensing elements 3 are connected together in the same way. When the detected object passes through a certain induction assembly 3, the induction electromotive force of the induction assembly 3 is increased, so that a required signal is obtained, if the detected object passes through the middle of two induction assemblies 3, the electromotive forces induced by 2 and 4 are equal and have the same polarity, however, when the detected object passes through the induction assembly 3 No. 1, a very large induction electromotive force is obtained, the electromotive force obtained by the induction assembly 3 No. 3 is very small, finally, the two groups of induction assemblies 3 obtain different induction electromotive forces, the induction circuit board 6 is accessed, and a required signal is obtained after calculation. The adjacent channels are used for difference, so that the purpose is to improve the common mode resistance and the anti-interference capability, namely the sensitivity.
The U1 adopts a singlechip C8051F500, an ADC with 12 bits is arranged in the singlechip C8051F500, the running speed of 48MHz, a U17(Tm1618), an LED display chip and a peripheral circuit form a position display circuit, and J3 is connected with liquid crystal display and keyboard operation and is used for parameter setting; the U10-U30 and the resistance-capacitance elements thereof form a filter buffer circuit, the U5-U14 ten operational amplifiers form ten differential amplifiers 8 which can process the capacity of 20 channels at most, the U22 and the U27 form controllable amplifiers, different sensitivities can be set with different amplification amounts, and the U2, the U3, the U4 and the U15 are electronic switches 9 which control signals of each channel to enter the amplifiers.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a high anti-interference multichannel metal detecting instrument which characterized in that: comprises an equipment shell (1), an induction component (3) and a nonmetal baffle (4); a detection channel (2) is arranged in the equipment shell (1), a plurality of corresponding mounting grooves are arranged at the upper end and the lower end in the equipment shell (1), and an induction component (3) is fixed in each mounting groove; the induction assembly (3) comprises magnetic steel (31) and an induction coil (32), the magnetic steel (31) is sleeved inside the induction coil (32), and the induction assembly (3) is fixed at the end part of the equipment shell (1) through a screw; induction open slots are formed in the upper end and the lower end of the detection channel (2), a nonmetal baffle (4) is arranged at the induction open slots, and the induction assemblies (3) are correspondingly arranged above the nonmetal baffle (4); the induction component (3) is connected to a wiring port (5) through a connecting lead, the wiring port (5) is arranged on the side edge of the bottom of the equipment shell (1) and is connected to a circuit board (6) through the wiring port (5); the circuit board (6) is provided with preamplifiers (7) and differential amplifiers (8), the induction component (3) is electrically connected to the preamplifiers (7) through connecting wires, each group of preamplifiers (7) is connected to the differential amplifiers (8), and the output ends of the differential amplifiers (8) are connected to the electronic switch (9); the electronic switch (9) is connected to the gain amplifier (10), the gain amplifier (10) is connected to the single chip microcomputer (11), and the single chip microcomputer (11) is connected with the sound alarm module (12), the position prompt module (13), the liquid crystal display module (14) and the motor control module (15).
2. The high interference rejection multi-channel metal detection instrument according to claim 1, wherein: the induction component (3) comprises magnetic steel (31) and an induction coil (32), the magnetic steel (31) is of a cylindrical structure, and the induction coil (32) is correspondingly sleeved inside the magnetic steel (31).
3. The high interference rejection multi-channel metal detection instrument according to claim 1, wherein: the induction component comprises an equipment shell (1), wherein a plurality of groups of induction components (3) corresponding to each other in pairs are arranged on the same end face of the equipment shell (1), and induction channels are formed between adjacent induction components (3).
4. The high interference rejection multi-channel metal detection instrument according to claim 1, wherein: the circuit board (6) is an external circuit board and can also be fixedly installed on the equipment shell (1).
5. The high interference rejection multi-channel metal detection instrument according to claim 1, wherein: the detection channel (2) and the equipment shell (1) are of an integrally formed structure, and the equipment shell (1) forms a gantry type rectangular structure.
6. The high interference rejection multi-channel metal detection instrument according to claim 1, wherein: and a feeding conveyor belt is arranged in the detection channel (2), and target detection objects are arranged on the feeding conveyor belt at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478799.5A CN113189655A (en) | 2021-04-30 | 2021-04-30 | High anti-interference multichannel metal detection instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478799.5A CN113189655A (en) | 2021-04-30 | 2021-04-30 | High anti-interference multichannel metal detection instrument |
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| CN113189655A true CN113189655A (en) | 2021-07-30 |
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| CN202110478799.5A Pending CN113189655A (en) | 2021-04-30 | 2021-04-30 | High anti-interference multichannel metal detection instrument |
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|---|---|---|---|---|
| GB526805A (en) * | 1939-01-17 | 1940-09-26 | Edward Lloyd Francis | Improvements in and relating to devices for detecting magnetic metal |
| CN2094720U (en) * | 1991-06-04 | 1992-01-29 | 上海市闸北区平行传感器厂 | Anti-interference magnetic sensor |
| CN2826417Y (en) * | 2005-04-22 | 2006-10-11 | 张永其 | Digitalized metal detecting instrument |
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| WO2014005431A1 (en) * | 2012-07-06 | 2014-01-09 | 北京磊岳同泰电子有限公司 | Chip-type magnetic sensor |
| CN105574982A (en) * | 2016-01-12 | 2016-05-11 | 深圳粤宝电子科技有限公司 | Magnetism reading device for coil magnetic core full bridge structure |
| WO2017002698A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社荏原製作所 | Metal detection sensor and metal detection method using same |
| JP2018141682A (en) * | 2017-02-27 | 2018-09-13 | アンリツインフィビス株式会社 | Metal Detector |
| CN208207235U (en) * | 2017-12-20 | 2018-12-07 | 福建省麦雅数控科技有限公司 | A kind of metal detection conveyer belt of high sensitivity |
| CN209198667U (en) * | 2018-12-21 | 2019-08-02 | 多科智能装备（常熟）有限公司 | A kind of metal detection machine reducing external interference |
| CN110133484A (en) * | 2019-06-26 | 2019-08-16 | 上海领先仪器有限公司 | The test device of the no difference multichannel wiring board of metal detection |
| CN111247712A (en) * | 2017-09-17 | 2020-06-05 | 毛恒春 | Modular high-efficiency wireless power transfer system |
-
2021
- 2021-04-30 CN CN202110478799.5A patent/CN113189655A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB526805A (en) * | 1939-01-17 | 1940-09-26 | Edward Lloyd Francis | Improvements in and relating to devices for detecting magnetic metal |
| CN2094720U (en) * | 1991-06-04 | 1992-01-29 | 上海市闸北区平行传感器厂 | Anti-interference magnetic sensor |
| CN2826417Y (en) * | 2005-04-22 | 2006-10-11 | 张永其 | Digitalized metal detecting instrument |
| WO2009004521A2 (en) * | 2007-07-02 | 2009-01-08 | Koninklijke Philips Electronics N.V. | Thermally stabilized pet detector for hybrid pet-mr system |
| WO2014005431A1 (en) * | 2012-07-06 | 2014-01-09 | 北京磊岳同泰电子有限公司 | Chip-type magnetic sensor |
| WO2017002698A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社荏原製作所 | Metal detection sensor and metal detection method using same |
| CN105574982A (en) * | 2016-01-12 | 2016-05-11 | 深圳粤宝电子科技有限公司 | Magnetism reading device for coil magnetic core full bridge structure |
| JP2018141682A (en) * | 2017-02-27 | 2018-09-13 | アンリツインフィビス株式会社 | Metal Detector |
| CN111247712A (en) * | 2017-09-17 | 2020-06-05 | 毛恒春 | Modular high-efficiency wireless power transfer system |
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Application publication date: 20210730 |
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