CN107797151A - A kind of reverse buckling type metal detection probe - Google Patents
A kind of reverse buckling type metal detection probe Download PDFInfo
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- CN107797151A CN107797151A CN201711388292.0A CN201711388292A CN107797151A CN 107797151 A CN107797151 A CN 107797151A CN 201711388292 A CN201711388292 A CN 201711388292A CN 107797151 A CN107797151 A CN 107797151A
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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
- G01V3/101—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 by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
- G01V3/102—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 by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention proposes a kind of reverse buckling type metal detection probe, and the probe is gantry shape testing stand；Gantry shape testing stand lower passage is sense channel；Detection module is provided with the shape testing stand of gantry；The detection module includes protecting crust, main control module, drive circuit, transmitting coil, receiving coil and receiving circuit；The receiving coil is even number, and each receiving coil specification is identical and is respectively positioned on above sense channel；Each receiving coil is parallel with sense channel；The transmitting coil is located above each receiving coil and parallel with it；Each receiving coil is symmetrical arranged using the central point of transmitting coil installation position as symmetric points above sense channel；The present invention passes through the improvement to probe internally provided loop construction so that probe can easily compatible infield conveyor equipment.
Description
Technical field
The present invention relates to material tests field, especially a kind of reverse buckling type metal detection probe.
Background technology
Metal detection probe is the common equipment that factory is detected to finished product, but existing sonde configuration has problem such as
Under；1st, anti-electromagnetic interference capability is poor, generally only one layer of shielding of shell；.2, sensitivity is low, because anti-electromagnetic interference capability is poor,
So sensitivity is low（Sensitivity dare not be heightened）；3rd, resistance to mechanical vibration ability is poor, because metal shell weight, volume are big, and
It is ghost, when there are mechanical oscillation, relative motion is had between receiving coil, produces wrong report；4th, installation is inconvenient, cost
It is high, it is necessary to use the streamline of the section factory of special transmission mechanism displacement one, when factory lines velocity variations, be not easy synchronization.
The content of the invention
The present invention proposes a kind of reverse buckling type metal detection probe, passes through the improvement to probe internally provided loop construction so that visit
Head can easily compatible infield conveyor equipment.
The present invention uses following technical scheme.
A kind of reverse buckling type metal detection probe, the probe is gantry shape testing stand；Gantry shape testing stand bottom
Passage is sense channel；Detection module is provided with the shape testing stand of gantry；The detection module includes protecting crust, main control module, drive
Dynamic circuit, transmitting coil, receiving coil and receiving circuit；The receiving coil is even number, each receiving coil specification it is identical and
It is respectively positioned on above sense channel；Each receiving coil is parallel with sense channel；The transmitting coil is located at each receiving coil
Top and parallel with it；Each receiving coil is right above sense channel using the central point of transmitting coil installation position as symmetric points
Claim to set.
The transmitting coil quantity is one, and each receiving coil is generally aligned in the same plane interior；When metal detection pops one's head in work,
Part to be checked irreversibly delivers in the sense channel.
The protecting crust is sandwich construction, and the sandwich construction of protecting crust includes outer casing, cushion, screen successively from the outside to the core
Cover layer and coil layer；The outer casing is with metal material moulding；The transmitting coil, receiving coil are at coil layer and remote
Screen layer；The screen layer includes electric field shielding film and/or magnetic field shielding film.
The screen layer sprays electric field shielding film and magnetic field shielding film based on plastics inside and outside it.
The electric field shielding film is molded with metallic copper or copper-clad silver conductive paint, and the magnetic field shielding film is with high magnetic conductivity material material
Conductive paint is molded.
The outer casing is provided with coil backplate with stainless steel or plastic shaping, the coil layer, and the coil backplate is with electricity
Wood shaping.
The cushion is molded with hard foam.
The main control module is connected with drive circuit, receiving circuit；The drive circuit is connected with transmitting coil；It is described to connect
Take-up circle is connected with receiving circuit；The receiving coil is made up of the receiving coil of specification identical first and the second receiving coil,
Dsp chip built in the main control module；Dsp chip exports square wave to drive circuit or exports sine wave signal through DDS chips；Institute
Push-pull circuit built in drive circuit is stated to amplify the signal that main control module transmits；Drive circuit has the resonant selecting frequency network side of filtering out
Higher hamonic wave in ripple turns into sine wave, and the drive circuit is connected with transmitting coil to export the signal after amplifying；It is described to connect
Take-up circle receives the signal of transmitting coil and received circuit delivers to main control module；When part metallic inclusion to be checked, it passes through
The process of receiving coil can change over time the first receiving coil, the signal phase of the second receiving coil reception and amplitude, this
Signal intensity obtains signal intensity value after phase sensitive detection and low-pass filtering treatment, when signal intensity value is more than threshold value, master control
Module sends alarm signal.
The main control module, drive circuit and receiving circuit are divided into different electromagnetic shielding containers.
The transmitting coil, receiving coil are rectangle；The receiving coil quantity is two, and the area of receiving coil is near
Patibhaga-nimitta is equal to the half of transmitting coil area；The operating voltage of the drive circuit is in more than 15V, the work of drive circuit
Electric current is provided with conveyer belt to transmit part to be checked in more than 6A, sense channel.
In the present invention, the probe is gantry shape testing stand；Gantry shape testing stand lower passage is sense channel；
Detection module is provided with the shape testing stand of gantry；The detection module include protecting crust, main control module, drive circuit, transmitting coil,
Receiving coil and receiving circuit；The receiving coil is even number, and each receiving coil specification is identical and is respectively positioned on sense channel
Side；Each receiving coil is parallel with sense channel；The transmitting coil is located above each receiving coil and parallel with it；Respectively
Receiving coil is symmetrical arranged using the central point of transmitting coil installation position as symmetric points above sense channel；This, which is designed, causes
Coil need not surround sense channel, when mounted, only need to be gantry shape testing stand back-off on conveyer belt, so as to very just
It is promptly compatible to conveyor equipment, without being reequiped to conveyor equipment.
In the present invention, screen layer is set due to setting cushion in the outer casing of stainless steel, and in the outside of coil layer, made
Metal shell vibrations trigger electric field, changes of magnetic field be not easy to interfere coil, so as to allow probe heightening sensitivity
Still it is not easy to report by mistake afterwards, pops one's head in and be not easy to report by mistake when running into surrounding environment vibrations such as production line board vibrations.
In the present invention, coil receiving circuit employs differential design amplification and phase sensitive detection design, possesses very strong resisting and does
Ability is disturbed, and can be strengthened probe by the learning functionality of software in the dsp chip of main control module and ambient noise is identified, carry
The antijamming capability of probe is risen, so as to allow probe to be still not easy to report by mistake after sensitivity is heightened.
In the present invention, dsp chip built in the main control module；Dsp chip exports square wave or through DDS chips to drive circuit
Export sine wave signal；Push-pull circuit built in the drive circuit is to amplify the sine wave signal that main control module transmits；The drive
The operating voltage of dynamic circuit is in more than 15V, and the operating current of drive circuit is in more than 6A；The design is sent out using powerful signal
Design is penetrated, and uses push-pull circuit emissivities is further strengthened to lift circuit efficiency, so as to effectively with big work(
Rate signal suppresses ambient noise, probe is tackled the quick detection of big quantity part to be checked.
In the present invention, the screen layer includes electric field shielding film and/or magnetic field shielding film；It is electric when being provided with screen layer simultaneously
When field shield film and magnetic field shielding film, isolated between electric field shielding film and magnetic field shielding film with dielectric film；The design can subtract
Capacity effect during few screened film stacking, due to electric field shielding film, the equal reliable ground of magnetic field shielding film, avoid accumulating at screened film
Electric charge or potential, and use flexible membrane to reduce screened film for shielding and be disturbed by when shaking to electric field, contribute to lifting to detect
The antijamming capability of probe, so as to allow probe to be still not easy to report by mistake after sensitivity is heightened.
This product sets cushion on the outside of screen layer so that exterior vibration is not easy to reach screen layer so that the gold of screen layer
Belong to film and be in static, disturbance will not be produced to electromagnetic field, so as to improve probe by the electromagnetic environment in stable probe
Antijamming capability.
This product shielding construction has three layers, including electric field（Copper contracted payment conductive paints）, magnetic field（High magnetic conductive material conductive paint）、
Electromagnetic field（Steel）Shielding；So as to have very strong anti-electromagnetic interference capability, product sensitivity can be significantly heightened without by ring
Border interference effect；And product shielding construction uses screened film in internal layer, due to screened film be extremely gently not easy it is affected by vibration, therefore
Interference caused by metal shell deformation can preferably be shielded.
In this product, the transmitting coil, receiving coil are at coil layer and away from screen layer；The design can avoid shielding
Cover the electromagnetic wave energy that layer absorbing coil is sent so that screen layer will not interfere to coil working.
, only need to be gantry shape testing stand back-off on conveyer belt when usefulness of the present invention is installation, testing stand bottom
There is multiple rows of screw hole, with streamline side plate（Backplate）Locking, so as to very easily compatible to conveyor equipment, without right
Conveyor equipment is reequiped, and has multilayer screen structure, strong antijamming capability.
Brief description of the drawings
The present invention is described in more detail with reference to the accompanying drawings and detailed description：
Accompanying drawing 1 is the schematic diagram of coil distribution of the present invention；
Accompanying drawing 2 is the schematic diagram of the present invention；
Accompanying drawing 3 is the circuit theory schematic diagram of the present invention；
Accompanying drawing 4 is the schematic diagram of screen layer；
Accompanying drawing 5 is the appearance schematic diagram of the present invention；
In figure：1- transmitting coils；2- receiving coils；3- coil backplates；4- conveyer belts；5- parts to be checked；6- protecting crusts；7- is buffered
Layer；8- screen layers；9- coil layers；10- main control modules；11- sense channels；12- is electromagnetically shielded container；13- drive circuits；14-
Receiving circuit；15- electric field shielding films；16- dielectric films；17- magnetic field shielding films；18- outer casings.
Embodiment
As Figure 1-4, a kind of reverse buckling type metal detection probe, the probe is gantry shape testing stand；Described gantry
Shape testing stand lower passage is sense channel 11；Detection module is provided with the shape testing stand of gantry；The detection module includes protection
Shell 6, main control module 10, drive circuit 13, transmitting coil 1, receiving coil 2 and receiving circuit 14；The receiving coil 2 is even number
Individual, each specification of receiving coil 2 is identical and is respectively positioned on the top of sense channel 11；Each receiving coil 2 is flat with sense channel 11
OK；The transmitting coil 1 is above each receiving coil 2 and parallel with it；Each receiving coil is with transmitting coil installation position
Central point is symmetric points, is symmetrical arranged above sense channel.
The transmitting coil quantity is one, and each receiving coil is generally aligned in the same plane interior；When metal detection pops one's head in work,
Part 5 to be checked irreversibly delivers in the sense channel 11.
The protecting crust 6 is sandwich construction, and the sandwich construction of protecting crust includes outer casing 18, cushion successively from the outside to the core
7th, screen layer 8 and coil layer 9；The outer casing 18 is with metal material moulding；The transmitting coil, receiving coil are located at coil layer
Place and remote screen layer；The screen layer includes electric field shielding film and/or magnetic field shielding film 17.
The screen layer sprays electric field shielding film and magnetic field shielding film based on plastics inside and outside it.
The electric field shielding film is molded with metallic copper or copper-clad silver conductive paint, and the magnetic field shielding film is with high magnetic conductivity material material
Conductive paint is molded.
For the outer casing with stainless steel or plastic shaping, the coil layer is provided with coil backplate 3, the coil backplate 3 with
Bakelite is molded.
The cushion is molded with hard foam.
The main control module 10 is connected with drive circuit 13, receiving circuit 14；The drive circuit 13 and transmitting coil phase
Even；The receiving coil is connected with receiving circuit；The receiving coil is received by the receiving coil of specification identical first and second
Coil forms, dsp chip built in the main control module；Dsp chip exports square wave to drive circuit or exported through DDS chips sinusoidal
Ripple signal；Push-pull circuit built in the drive circuit is to amplify the signal that main control module transmits；Drive circuit has resonant selecting frequency
The higher hamonic wave that network is filtered out in square wave turns into sine wave, and the drive circuit is connected with transmitting coil to export the letter after amplifying
Number；The receiving coil receives the signal of transmitting coil and received circuit delivers to main control module；When part metallic inclusion to be checked
When, it can make the first receiving coil, the signal phase of the second receiving coil reception and amplitude at any time by the process of receiving coil
Between change, this signal intensity obtains signal intensity value after phase sensitive detection and low-pass filtering treatment, when signal intensity value is more than threshold
During value, main control module sends alarm signal.
The main control module, drive circuit and receiving circuit are divided into different electromagnetic shielding containers.
The transmitting coil, receiving coil are rectangle；The receiving coil quantity is two, and the area of receiving coil is near
Patibhaga-nimitta is equal to the half of transmitting coil area；The operating voltage of the drive circuit is in more than 15V, the work of drive circuit
Electric current is provided with conveyer belt 4 to transmit part 5 to be checked in more than 6A, sense channel 11.
It is embodiments of the invention below：
Install pop one's head in when, probe back-off on conveyer belt, being locked at streamline side plate（Backplate）On, by field working conditions, if
Determine the signal alarm threshold of main control module, circuit gain, learn product effect so that in normal conditions, probe will not align
Normal electromagnetic disturbance alarm.
Pop one's head in work when, transmitting coil transmitting signal by both sides receiving coil receive, when in sense channel without to be checked
During thing, because two receiving coil specifications are identical, therefore received signal is consistent, and probe is not alarmed.
When probe carries out metal detection to thing to be checked, thing to be checked is sent into sense channel by conveyer belt；If in thing to be checked
Metal object be present, metal inside can produce vortex, and interference is produced to the electromagnetic field in sense channel, so that first receives line
Signal phase and amplitude that circle, the second receiving coil receive produce the change in different time points, and this signal intensity is examined through phase sensitivity
Signal intensity value is obtained after ripple and low-pass filtering treatment, when signal intensity value is more than threshold value, main control module sends alarm signal.
Conveyer mechanism in probe back-off area is molded with nonmetallic materials, and conveyer belt conveyor surface is also with non-metallic material
Material shaping.
Claims (10)
- A kind of 1. reverse buckling type metal detection probe, it is characterised in that：The probe is gantry shape testing stand；Gantry shape inspection Test aircraft lower passage is sense channel；Detection module is provided with the shape testing stand of gantry；The detection module includes protecting crust, master control Module, drive circuit, transmitting coil, receiving coil and receiving circuit；The receiving coil is even number, each receiving coil specification It is identical and be respectively positioned on above sense channel；Each receiving coil is parallel with sense channel；The transmitting coil, which is located at, respectively to be connect It is above take-up circle and parallel with it；Each receiving coil is using the central point of transmitting coil installation position as symmetric points, in sense channel Top is symmetrical arranged.
- A kind of 2. reverse buckling type metal detection probe according to claim 1, it is characterised in that：The transmitting coil quantity is One, each receiving coil is generally aligned in the same plane interior；When metal detection pops one's head in work, part to be checked is unidirectional in the sense channel Conveying.
- A kind of 3. reverse buckling type metal detection probe according to claim 1, it is characterised in that：The protecting crust is multilayer knot Structure, the sandwich construction of protecting crust include outer casing, cushion, screen layer and coil layer successively from the outside to the core；The outer casing with Metal material moulding；The transmitting coil, receiving coil are at coil layer and away from screen layer；The screen layer includes electric field Screened film and/or magnetic field shielding film.
- A kind of 4. reverse buckling type metal detection probe according to claim 3, it is characterised in that：The screen layer using plastics as Main body, electric field shielding film and magnetic field shielding film are sprayed inside and outside it.
- A kind of 5. reverse buckling type metal detection probe according to claim 4, it is characterised in that：The electric field shielding film is with gold Belong to copper or the shaping of copper-clad silver conductive paint, the magnetic field shielding film are molded with high magnetic conductivity material material conductive paint.
- A kind of 6. reverse buckling type metal detection probe according to claim 3, it is characterised in that：The outer casing is with stainless steel Or plastic shaping, the coil layer are provided with coil backplate, the coil backplate is molded with bakelite.
- A kind of 7. reverse buckling type metal detection probe according to claim 3, it is characterised in that：The cushion is steeped with hard Foam material is molded.
- A kind of 8. reverse buckling type metal detection probe according to claim 1, it is characterised in that：The main control module and driving Circuit, receiving circuit are connected；The drive circuit is connected with transmitting coil；The receiving coil is connected with receiving circuit；It is described Receiving coil is made up of the receiving coil of specification identical first and the second receiving coil, dsp chip built in the main control module； Dsp chip exports square wave to drive circuit or exports sine wave signal through DDS chips；Push-pull circuit built in the drive circuit with The signal that amplification main control module transmits；There is drive circuit resonant selecting frequency network, which to filter out the higher hamonic wave in square wave, turns into sine Ripple, the drive circuit are connected with transmitting coil to export the signal after amplifying；The receiving coil receives the letter of transmitting coil Number and received circuit deliver to main control module；When part metallic inclusion to be checked, it can make first by the process of receiving coil The signal phase and amplitude that receiving coil, the second receiving coil receive change over time, and this signal intensity is through phase sensitive detection and low Signal intensity value is obtained after pass filter processing, when signal intensity value is more than threshold value, main control module sends alarm signal.
- A kind of 9. reverse buckling type metal detection probe according to claim 3, it is characterised in that：The main control module, driving Circuit and receiving circuit are divided into different electromagnetic shielding containers.
- A kind of 10. reverse buckling type metal detection probe according to claim 2, it is characterised in that：The transmitting coil, reception Coil is rectangle；The receiving coil quantity is two, and the area approximation of receiving coil is equal to the two of transmitting coil area / mono-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711388292.0A CN107797151A (en) | 2017-12-20 | 2017-12-20 | A kind of reverse buckling type metal detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711388292.0A CN107797151A (en) | 2017-12-20 | 2017-12-20 | A kind of reverse buckling type metal detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107797151A true CN107797151A (en) | 2018-03-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711388292.0A Pending CN107797151A (en) | 2017-12-20 | 2017-12-20 | A kind of reverse buckling type metal detection probe |
Country Status (1)
| Country | Link |
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| CN (1) | CN107797151A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680960A (en) * | 2018-07-14 | 2018-10-19 | 漳州市玉山电子制造有限公司 | A kind of metal detector of difference output driving mode |
| CN110686806A (en) * | 2019-11-07 | 2020-01-14 | 徐州陀微传感科技有限公司 | Pressure sensor and preparation method thereof |
| CN111023958A (en) * | 2019-12-24 | 2020-04-17 | 东南大学 | A method for measuring displacement response of explosive test structures |
| CN112799138A (en) * | 2021-02-02 | 2021-05-14 | 福建省麦雅数控科技有限公司 | High-sensitivity metal foreign matter detection probe of ultrathin material production line and working method and manufacturing method thereof |
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| CN110686806A (en) * | 2019-11-07 | 2020-01-14 | 徐州陀微传感科技有限公司 | Pressure sensor and preparation method thereof |
| CN111023958A (en) * | 2019-12-24 | 2020-04-17 | 东南大学 | A method for measuring displacement response of explosive test structures |
| CN111023958B (en) * | 2019-12-24 | 2021-07-09 | 东南大学 | A method for measuring displacement response of explosive test structures |
| CN112799138A (en) * | 2021-02-02 | 2021-05-14 | 福建省麦雅数控科技有限公司 | High-sensitivity metal foreign matter detection probe of ultrathin material production line and working method and manufacturing method thereof |
| CN112799138B (en) * | 2021-02-02 | 2024-01-16 | 福建省麦雅数控科技有限公司 | High-sensitivity metal foreign matter detection probe of ultrathin material production line, working method and manufacturing method thereof |
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