CN205354179U - Coil magnetic core full -bridge structure reads magnetism ware - Google Patents
Coil magnetic core full -bridge structure reads magnetism ware Download PDFInfo
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- CN205354179U CN205354179U CN201620024801.6U CN201620024801U CN205354179U CN 205354179 U CN205354179 U CN 205354179U CN 201620024801 U CN201620024801 U CN 201620024801U CN 205354179 U CN205354179 U CN 205354179U
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Abstract
The utility model discloses a coil magnetic core full -bridge structure reads magnetism ware is connected with the host processing ware of anti -fake check out test set, the magnetism ware of reading include the shell, be provided with permalloy shielding shell and difference and amplify the module in the shell, be equipped with the operation window along the length direction of permalloy shielding shell and just set gradually a plurality of independent monitoring channel in the operation window, every monitoring channel is the hui sitong full -bridge structure that comprises 4 magnetism induction element, favour stones full -bridge structure is arranged in induced magnetic field's change output differential voltage signal to enlarge the module to the difference, the difference is enlargied the module and is had the common mode of suppression incoming signal, enlarge differential mode incoming signal's function, and the host processing ware of the anti -fake signal of output quarantine objects's magnetism characteristic for anti -fake check out test set, thereby improved homemade traditional coil + magnetic core formula widely and read magnetic sensor anti -electromagnetic interference performance and output signal's SNR, the performance requirement of anti -fake check out test set to reading magnetic sensor anti -electromagnetic interference and SNR has been reached.
Description
Technical field
This utility model relates to anti-counterfeiting detection, identification technology, particularly to the reading chinaware of wound core full bridge structure.
Background technology
Serial number on the multiple big banknote such as RMB, Euro, dollar, pattern ink and metallic airbag line are distributed with magnetic material, record magnetic feature anti-counterfeiting information.
Bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine are in order to judge the true and false of banknote, must be configured with reading the reading Magnetic Sensor of magnetic characteristic anti-counterfeiting information on banknote, and the banknote magnetic characteristic anti-counterfeiting information that sensor reads is processed, thus identifying the true and false and the denomination of institute's currency examination ticket.
Bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine volume big, function is many, the electromagnetic interference that its internal heavy-duty motor and various circuit board produce is relatively big, and the signal to noise ratio of the electromagnetism interference performance and output signal of reading Magnetic Sensor is had higher requirements.
Magnetic Sensor read by the indium antimonide quasiconductor (MR) commonly using the production of MURATA company of Japan on current domestic high-grade currency examination cleaning-sorting machine, ATM in bank.The signal to noise ratio of this semiconductor transducer electromagnetism interference performance and output signal is better, but price is much more expensive.And domestic traditional coil+magnetic-core type reads Magnetic Sensor, although price is very cheap, but owing to each sense channel only has 1 or 2 coil+magnetic core Parallel opertation structures, the signal to noise ratio making its electromagnetism interference performance and output signal is poor, it is only used on low and middle-grade small-sized cash inspecting machine, and is not used on bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine.
In view of this, the prior art of domestic traditional coil+magnetic-core type reading Magnetic Sensor has yet to be improved and developed.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is in that to provide the reading chinaware of wound core full bridge structure, aim to solve the problem that the signal to noise ratio of existing coil+magnetic-core type reading Magnetic Sensor electromagnetism interference performance and output signal thereof is poor, it is impossible to the problem on the anti-counterfeiting detection equipment such as bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine.
In order to achieve the above object, this utility model takes techniques below scheme:
The reading chinaware of wound core full bridge structure, it is connected with the primary processor of anti-counterfeiting detection equipment, described reading chinaware includes shell, permalloy shielding case it is provided with and for suppressing common mode input signal in described shell, amplify the function of differential input signal, and export the magnetic feature anti-counterfeiting signal of thing to be checked to the differential amplification module of the primary processor of anti-counterfeiting detection equipment, length direction along permalloy shielding case is provided with operation window, and in described operation window, it is disposed with multiple independent sense channel, each sense channel is be made up of 4 magnetic induction unit, for the change output differential voltage signal of induced field to the favour stone full bridge structure in differential amplification module.
In the reading chinaware of described wound core full bridge structure, described magnetic induction unit includes a Nd-Fe-B magnet steel, a permalloy magnetic core, a gap copper sheet, a coil, is additionally provided with magnetic sheet in a permalloy between adjacent two magnetic induction unit；Wherein, described Nd-Fe-B magnet steel, permalloy magnetic core, magnetic sheet, gap copper sheet, coil composition magnetic loop in permalloy.
In the reading chinaware of described wound core full bridge structure, described gap copper piece clip is located in Nd-Fe-B magnet steel and permalloy between magnetic sheet, the gathering throat of the formation magnetic information for reading thing to be checked, described permalloy magnetic core and coil are positioned at the lower section of described Nd-Fe-B magnet steel, in the partial insertion coil of described permalloy magnetic core.
In the reading chinaware of described wound core full bridge structure, described magnetic induction unit also includes coil holder and binding post, and described coil winding is on described coil holder, and described binding post is arranged on described coil holder, and the two ends of described coil are wound on described binding post.
In the reading chinaware of described wound core full bridge structure, the common port of adjacent two coils shares a binding post.
In the reading chinaware of described wound core full bridge structure, the work surface of described shell is provided with two row's ferrites.
In the reading chinaware of described wound core full bridge structure, described differential amplification module includes the first operational amplifier, the second operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity；4 magnetic induction unit respectively the first magnetic induction unit, the second magnetic induction unit, the 3rd magnetic induction unit and the 4th magnetic induction unit, wherein, the opposite polarity of the first magnetic induction unit and the 3rd magnetic induction unit, the opposite polarity of the second magnetic induction unit and the 4th magnetic induction unit, described first magnetic induction unit and the second magnetic induction unit or the 4th magnetic induction unit are disposed adjacent, and described second magnetic induction unit and the 4th magnetic induction unit or the second magnetic induction unit are disposed adjacent；The common port of described first magnetic induction unit and the 3rd magnetic induction unit passes sequentially through the first electric capacity and the first resistance connects the positive input terminal of the first operational amplifier, the not common end of the first magnetic induction unit and the not common end ground connection of the 3rd magnetic induction unit, the common port of described second magnetic induction unit and the 4th magnetic induction unit passes sequentially through the second electric capacity and the second resistance connects the negative input end of the first operational amplifier, the not common end of the second magnetic induction unit and the not common end ground connection of the 4th magnetic induction unit, the negative input end of described first operational amplifier connects the outfan of the first operational amplifier by the 4th resistance, described 4th electric capacity and the 4th resistor coupled in parallel；The positive input terminal of described first operational amplifier connects one end of the 6th electric capacity by the 3rd resistance, one end of 7th electric capacity, one end of 6th resistance and one end of the 7th resistance, the other end of described 7th electric capacity and the other end of the 7th resistance connect feeder ear, the other end of described 6th electric capacity and the other end ground connection of the 6th resistance, described 3rd electric capacity and the 3rd resistor coupled in parallel, the outfan of described first operational amplifier passes sequentially through the 5th electric capacity and the 5th resistance connects the negative input end stating the second operational amplifier, the negative input end of the second operational amplifier connects the outfan of the second operational amplifier by the 11st resistance, described tenth electric capacity and the 11st resistor coupled in parallel, the positive input terminal of described second operational amplifier connects one end of the 8th electric capacity by the 8th resistance, one end of 9th electric capacity, one end of 9th resistance and one end of the tenth resistance, the other end of described 8th electric capacity and the other end of the 9th electric capacity connect feeder ear, the other end of the 9th resistance and the other end ground connection of the tenth resistance.
The reading chinaware of described wound core full bridge structure, also include circuit board and bonnet, described differential amplification module is arranged on described circuit board, described binding post is arranged on circuit board, electrically connects with differential amplification module through described bonnet, described circuit board is provided with pin, electrically connects with the primary processor of anti-counterfeiting detection equipment.
In the reading chinaware of described wound core full bridge structure, described circuit board being provided with epoxy resin insulating layers, described epoxy resin insulating layers covers a part for described differential amplification module, the end of binding post and pin.
In the reading chinaware of described wound core full bridge structure, described sense channel is 16, and the work surface of described shell is provided with 32 grooves coordinated with the installing rack of anti-counterfeiting detection equipment.
Compared to prior art, the reading chinaware of the wound core full bridge structure that this utility model provides, it is connected with the primary processor of anti-counterfeiting detection equipment, described reading chinaware includes shell, permalloy shielding case and differential amplification module it is provided with in described shell, length direction along permalloy shielding case is provided with operation window and is disposed with multiple independent sense channel in described operation window, and each sense channel is the favour stone full bridge structure being made up of 4 magnetic induction unit；Described favour stone full bridge structure exports differential voltage signal in differential amplification module for the change of induced field, described differential amplification module has suppression common mode input signal, amplify the function of differential input signal, and export the magnetic feature anti-counterfeiting signal of thing to be checked to the primary processor of anti-counterfeiting detection equipment.This utility model utilizes the change generation differential voltage output being made up of Wheatstone bridge induced field 4 independent magnetic induction unit, differential amplification module is utilized to have the inhibitory action to common mode input signal (i.e. electromagnetic interference signal), amplification principle to differential input signal (i.e. banknote magnetic signal), thus greatly increasing domestic traditional coil+magnetic-core type to read Magnetic Sensor electromagnetism interference performance and the signal to noise ratio of output signal, reach the anti-counterfeiting detection equipment such as bank's automatic teller machine (ATM) or the high-grade currency examination cleaning-sorting machine performance requirement to reading Magnetic Sensor electromagnetism interference and signal to noise ratio.
Accompanying drawing explanation
The sectional view reading chinaware of the wound core full bridge structure that Fig. 1 provides for this utility model embodiment.
The front view reading chinaware of the wound core full bridge structure that Fig. 2 provides for this utility model embodiment.
The left view reading chinaware of the wound core full bridge structure that Fig. 3 provides for this utility model embodiment.
The top view reading chinaware of the wound core full bridge structure that Fig. 4 provides for this utility model embodiment.
The upward view reading chinaware of the wound core full bridge structure that Fig. 5 provides for this utility model embodiment.
The circuit diagram of favour stone full bridge structure and differential amplification module in the reading chinaware of the wound core full bridge structure that Fig. 6 provides for this utility model embodiment.
Detailed description of the invention
This utility model provides the reading chinaware of wound core full bridge structure, it is provided with 16 independent sense channels, the change that each sense channel is formed Wheatstone bridge induced field by 4 independent magnetic induction unit produces differential voltage output, the differential amplification module on circuit board is utilized to have the inhibitory action to common mode input signal (i.e. electromagnetic interference signal), amplification operation principle to differential input signal (i.e. banknote magnetic signal), thus greatly increasing domestic traditional coil+magnetic-core type to read Magnetic Sensor electromagnetism interference performance and the signal to noise ratio of output signal, bank's automatic teller machine (ATM) or the high-grade currency examination cleaning-sorting machine performance requirement to reading Magnetic Sensor electromagnetism interference and signal to noise ratio are reached, there is good popularizing application prospect.
For making the purpose of this utility model, technical scheme and effect clearly, clearly, develop simultaneously embodiment to this utility model further description referring to accompanying drawing.Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
The reading chinaware of the wound core full bridge structure that this utility model provides, is connected with the primary processor of anti-counterfeiting detection equipment.Wherein, anti-counterfeiting detection equipment is bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine etc., and thing to be checked is the financial document with magnetic characteristic such as bank note, bank money, security.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the reading chinaware of wound core full bridge structure of the present utility model includes shell 1, and the two ends of described shell are provided with cap nut 23 or screw, in order to is installed by reading chinaware and is fixed on cleaning-sorting machine.The end face of shell 1 adopts plain grinding lathe that smooth work surface 33 is ground, it is simple to coordinate pressure emery wheel conveying banknote 32.Permalloy shielding case 2 and differential amplification module 14 it is provided with in described shell.Described shell 1 is cabinet, and the both sides of described shell are respectively fixed with permalloy shielding case 2 by 6 the first screws 21.
The described length direction along permalloy shielding case 2 is provided with operation window (in figure non-label) and is disposed with multiple independent sense channel in described operation window, and each sense channel is the favour stone full bridge structure 100 being made up of 4 magnetic induction unit.
In the present embodiment, described sense channel is 16, mating with the processor on bank's automatic teller machine (ATM), high-grade currency examination cleaning-sorting machine, thus accurately reading the magnetic characteristic information on banknote 32, accurately identifying the true and false and the face amount of banknote 32.Described favour stone full bridge structure exports differential voltage signal in differential amplification module 14 for the change of induced field, described differential amplification module 14 has suppression common mode input signal, amplify the function of differential input signal, and export the magnetic feature anti-counterfeiting signal of 16 tunnel things to be checked to the primary processor of anti-counterfeiting detection equipment, the primary processor of anti-counterfeiting detection equipment, according to the true and false and the face amount of reading the magnetic information identification thing to be checked that chinaware feeds back, has reached bank ATM and the requirement of high-grade currency examination cleaning-sorting machine.
Please continue to refer to Fig. 1 to Fig. 5, described magnetic induction unit includes Nd-Fe-B magnet steel 5, permalloy magnetic core 8, gap copper sheet 6, coil 9, is additionally provided with in a permalloy magnetic sheet 7 between adjacent two magnetic induction unit；Wherein, described Nd-Fe-B magnet steel 5, permalloy magnetic core 8, magnetic sheet 7, gap copper sheet 6, coil 9 form magnetic loop in permalloy.
In the present embodiment, described gap copper sheet 6 is located in Nd-Fe-B magnet steel 5 and permalloy between magnetic sheet 7, the gathering throat of the formation magnetic information for reading thing to be checked, and gathering throat stretches out the operation window of permalloy shielding case 2.Described permalloy magnetic core 8 and coil 9 are positioned at the lower section of described Nd-Fe-B magnet steel 5, in the partial insertion coil 9 of described permalloy magnetic core 8.
Being additionally provided with allumen magnetic core seat 3 between permalloy shielding case 2 and permalloy magnetic core 8, allumen magnetic core seat 3 is fixed on permalloy shielding case 2 by the second screw.Namely allumen magnetic core seat 3 is arranged in the outside of permalloy magnetic sheet 7, and in permalloy, the bottom of magnetic sheet 7 is in adjacent two permalloys between magnetic sheet 7, and in permalloy, the top of magnetic sheet 7 is between adjacent two Nd-Fe-B magnet steels 5.
When being embodied as, described magnetic induction unit may also include coil holder 10 and binding post 11, and described coil 9 is wound on described coil holder 10, and described binding post 11 is arranged on described coil holder 10, and the two ends of described coil 9 are wound on described binding post 11.The common port of adjacent two coils 9 shares a binding post 11, and namely adjacent two magnetic induction unit have three binding posts 11, and middle binding post 11 is public binding post 11, and the end of permalloy magnetic core 8 inserts in coil holder 10, as shown in Figure 1.
It is preferred that be provided with two row's ferrites 4 on the work surface 33 of described shell, ferrite 4 is 12, is positioned at the both sides of Nd-Fe-B magnet steel 5, is used for improving reading chinaware friction durability.
Please continue to refer to Fig. 1 to Fig. 5, described reading chinaware may also include circuit board 13 and bonnet 12, described differential amplification module 14 is arranged on described circuit board 13, described binding post 11 is arranged on circuit board 13, electrically connects with differential amplification module 14 through described bonnet 12, described circuit board 13 is provided with pin 16, electrically connects with the primary processor of anti-counterfeiting detection equipment.In the present embodiment, each sense channel arranges 16,16 sense channels of a pin and has 16 pins 16, and therefore, 16 differential amplification modules 14 export 16 road banknote 32 magnetic signals to cleaning-sorting machine or ATM process.
In order to make circuit board 13 performance make stable and improve the security performance reading chinaware, circuit board 13 being provided with epoxy resin insulating layers 15, described epoxy resin insulating layers 15 covers a part for described differential amplification module 14, the end of binding post 11 and pin 16,.
Seeing also Fig. 1 to Fig. 6, specifically, each sense channel includes 4 magnetic induction unit, is respectively as follows: the first magnetic induction unit L1, the second magnetic induction unit L2, the 3rd magnetic induction unit L3 and the four magnetic induction unit L4.Wherein, the opposite polarity of the first magnetic induction unit L1 and the three magnetic induction unit L3, the opposite polarity of the second magnetic induction unit L2 and the four magnetic induction unit L4, described first magnetic induction unit L1 and the second magnetic induction unit L2 or the 4th magnetic induction unit L4 is disposed adjacent.
That is: the first magnetic induction unit L1(or the second magnetic induction unit L2) output increase the 3rd magnetic induction unit L3(the 4th magnetic induction unit L4 simultaneously) output minimizing.In like manner, the 3rd magnetic induction unit L3(or the 4th magnetic induction unit L4) output increase by first magnetic induction unit L1(the second magnetic induction unit L2 simultaneously) output minimizing.Therefore, first magnetic induction unit L1 and the three magnetic induction unit L3(or the second magnetic induction unit L2 and the four magnetic induction unit L4) form push-pull bridge structure, produce two times of bridge voltage outputs, improve the output sensitivity reading chinaware of described wound core full bridge structure.
4 magnetic induction unit are adopted symmetrical structure by this utility model, make differential amplification module 14 when circuit symmetrical, having very strong suppression null offset and suppress noise and interference performance, the reading chinaware anti-electromagnetic interference capability greatly enhancing described wound core full bridge structure improves its signal to noise ratio.
Please continue to refer to Fig. 6, described differential amplification module 14 includes first operational amplifier A the 1, second operational amplifier A the 2, first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9 and the ten electric capacity C10.
Wherein, first operational amplifier A the 1, second operational amplifier A 2 can be integrated in chip piece, as: model is the double operational integrated chip of TP2412, described first electric capacity C1, the second electric capacity C2 capacitance be 0.1uF, the 3rd electric capacity C3, the 4th electric capacity C4, the 6th electric capacity C6, the 7th electric capacity C7 and the ten electric capacity C10 capacitance be 510pF.The capacitance of the 5th electric capacity C5 is 47nF, and the capacitance of the 8th electric capacity C8 and the nine electric capacity C9 is 1nF.First resistance R1, the second resistance R2 and the eight resistance R8 resistance be 1K Ω, 3rd resistance R3, the 4th resistance R4 and the 11 resistance R11 resistance be 200K Ω, the resistance of the 5th resistance R5 is 2K Ω, the resistance of the 6th resistance R6 and the seven resistance R7 is 300K Ω, and the resistance of the 9th resistance R9 and the ten resistance R10 is 390K Ω.
In the present embodiment, the common port of described first magnetic induction unit L1 and the three magnetic induction unit L3 passes sequentially through the first electric capacity C1 and the first resistance R1 and connects the positive input terminal of the first operational amplifier A 1, the not common end of the first magnetic induction unit L1 and the not common end ground connection of the 3rd magnetic induction unit L3, the common port of described second magnetic induction unit L2 and the four magnetic induction unit L4 passes sequentially through the second electric capacity C2 and the second resistance R2 and connects the negative input end of the first operational amplifier A 1, the not common end of the second magnetic induction unit L2 and the not common end ground connection of the 4th magnetic induction unit L4, the negative input end of described first operational amplifier A 1 connects the outfan of the first operational amplifier A 1 by the 4th resistance R4, described 4th electric capacity C4 and the four resistance R4 is in parallel；The positive input terminal of described first operational amplifier A 1 connects one end of the 6th electric capacity C6 by the 3rd resistance R3, one end of 7th electric capacity C7, one end of 6th resistance R6 and one end of the 7th resistance R7, the other end of described 7th electric capacity C7 and the other end of the 7th resistance R7 connect feeder ear, the other end of described 6th electric capacity C6 and the other end ground connection of the 6th resistance R6, described 3rd electric capacity C3 and the three resistance R3 is in parallel, the outfan of described first operational amplifier A 1 passes sequentially through the 5th electric capacity C5 and the five resistance R5 and connects the negative input end stating the second operational amplifier A 2, the negative input end of the second operational amplifier A 2 connects the outfan of the second operational amplifier A 2 by the 11st resistance R11, described tenth electric capacity C10 and the 11 resistance R11 is in parallel, the positive input terminal of described second operational amplifier A 2 connects one end of the 8th electric capacity C8 by the 8th resistance R8, one end of 9th electric capacity C9, one end of 9th resistance R9 and one end of the tenth resistance R10, the other end of described 8th electric capacity C8 and the other end of the 9th electric capacity C9 connect feeder ear, the other end of the 9th resistance R9 and the other end ground connection of the tenth resistance R10.
It is connected by the common port of the first magnetic induction unit L1 and the three magnetic induction unit L3 and exports a road voltage signal u1 and connect the positive input terminal of the first operational amplifier A 1.The common port of the second magnetic induction unit L2 and the four magnetic induction unit L4 is connected and exports a road voltage signal u2, and connects the negative input end of the first operational amplifier A 1.All the other ends of L1, L3, L2, L4 are ground connection respectively, is undertaken the 2nd grade by the second operational amplifier A 2 and compares amplification, and circuit total magnification is about 20,000 times.
Please continue to refer to Fig. 1 to Fig. 4, described reading chinaware overall length 195 ± 0.2mm, height overall 31.3 ± 0.2mm, beam overall 15.9 ± 0.2mm, the work surface both sides of described cover top portion arrange the groove 22 having 32 long 5mm, deep 2mm, coordinate with the installing rack on currency examination cleaning-sorting machine that to be easy to walk paper money smooth and easy.The bottom of described shell is provided with 6 M2 nuts 24, it is simple to client installs pcb board.
In the present embodiment, 16 sense channel composition magnetic core read ranges are about 176mm, arrange 16 independent sense channels and are conducive to the magnetic characteristic anti-counterfeiting information of record separately reading output on the serial number that will be distributed on banknote 32 determinand breadth such as grade, pattern ink and metallic airbag line to be convenient for processing, identifying to cleaning-sorting machine, ATM.
In order to be better understood from this utility model, please in conjunction with Fig. 1 to Fig. 6, the operation principle reading chinaware of wound core full bridge structure of the present utility model be described in detail down:
When currency examination cleaning-sorting machine or ATM work, banknote 32 is against the work surface reading chinaware of wound core full bridge structure and travels forward by money pressing wheel 31.Magnetic material in serial number on banknote 32, pattern ink and safety line, change Nd-Fe-B magnet steel 5 and middle magnetic sheet in magnetic induction unit and form the density of line of magnetic force between gathering throat and distribution, thus causing the magnetic flux being formed in magnetic loop by magnetic sheet 7, permalloy magnetic core 8, coil 9 in a Nd-Fe-B magnet steel 5, gap copper sheet 6, permalloy to produce change, coil 9 thus produces faradism physical features output corresponding signal.Wheatstone bridge doubleway output is formed by above-mentioned 4 magnetic induction unit.The time and the position that successively arrive 4 magnetic induction unit in described Wheatstone bridge due to banknote 32 are different, therefore, described Wheatstone bridge output voltage u1 ≠ u2, the described difference channel first order amplifies output voltage u0=200K Ω/1K Ω * (u1-u2)=200*(u1-u2), voltage difference (u1-u2) is amplified about 200 times by first order amplifier.First order amplifier output voltage u0 is then through second level amplifier amplification=200K Ω/2K Ω * u0=100*u0 about 100 times, and difference mode signal (u1-u2) is always amplified by described difference channel and about exports through pin 1616 after 200*100=20000 times.Namely the banknote 32 magnetic feature anti-counterfeiting signal read is had amplification by described difference channel.
Bank's automatic teller machine (ATM), the internal heavy-duty motor of high-grade currency examination cleaning-sorting machine and various circuit board 13 apart from described wound core full bridge structure reading chinaware work surface farther out, the electromagnetic radiation that motor various circuit board 13 produces is identical to the interference of 4 magnetic induction unit in described Wheatstone bridge, then described Wheatstone bridge output common mode signal u1=u2, the described difference channel first order amplifies output voltage u0=200K Ω/1K Ω * (u1-u2)=0, when second level amplifier output is also 0(Wheatstone bridge and difference channel parameter perfect symmetry), namely described difference channel is to ATM in bank, the electromagnetic interference that the internal heavy-duty motor of high-grade currency examination cleaning-sorting machine and various circuit board 13 produce has inhibitory action, thus greatly increasing domestic traditional coil 9+ magnetic-core type to read Magnetic Sensor electromagnetism interference performance and the signal to noise ratio of output signal, bank's automatic teller machine (ATM) or the high-grade currency examination cleaning-sorting machine performance requirement to reading Magnetic Sensor electromagnetism interference and signal to noise ratio are reached.There is good popularizing application prospect.
It is understandable that; for those of ordinary skills; can conceive according to the technical solution of the utility model and utility model thereof and be equal to replacement or change, and all these change or replace the scope of the claims that all should belong to appended by this utility model.
Claims (10)
1. the reading chinaware of wound core full bridge structure, it is connected with the primary processor of anti-counterfeiting detection equipment, described reading chinaware includes shell, it is characterized in that, permalloy shielding case it is provided with and for suppressing common mode input signal in described shell, amplify the function of differential input signal, and export the magnetic feature anti-counterfeiting signal of thing to be checked to the differential amplification module of the primary processor of anti-counterfeiting detection equipment, length direction along permalloy shielding case is provided with operation window, and in described operation window, it is disposed with multiple independent sense channel, each sense channel is be made up of 4 magnetic induction unit, for the change output differential voltage signal of induced field to the favour stone full bridge structure in differential amplification module.
2. the reading chinaware of wound core full bridge structure according to claim 1, it is characterized in that, described magnetic induction unit includes a Nd-Fe-B magnet steel, a permalloy magnetic core, a gap copper sheet, a coil, is additionally provided with magnetic sheet in a permalloy between adjacent two magnetic induction unit；Wherein, described Nd-Fe-B magnet steel, permalloy magnetic core, magnetic sheet, gap copper sheet, coil composition magnetic loop in permalloy.
3. the reading chinaware of wound core full bridge structure according to claim 2, it is characterized in that, described gap copper piece clip is located in Nd-Fe-B magnet steel and permalloy between magnetic sheet, the gathering throat of the formation magnetic information for reading thing to be checked, described permalloy magnetic core and coil are positioned at the lower section of described Nd-Fe-B magnet steel, in the partial insertion coil of described permalloy magnetic core.
4. the reading chinaware of wound core full bridge structure according to claim 3, it is characterized in that, described magnetic induction unit also includes coil holder and binding post, and described coil winding is on described coil holder, described binding post is arranged on described coil holder, and the two ends of described coil are wound on described binding post.
5. the reading chinaware of wound core full bridge structure according to claim 4, it is characterised in that the common port of adjacent two coils shares a binding post.
6. the reading chinaware of wound core full bridge structure according to claim 1, it is characterised in that be provided with two row's ferrites on the work surface of described shell.
7. the reading chinaware of wound core full bridge structure according to claim 1, it is characterized in that, described differential amplification module includes the first operational amplifier, the second operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity；4 magnetic induction unit respectively the first magnetic induction unit, the second magnetic induction unit, the 3rd magnetic induction unit and the 4th magnetic induction unit, wherein, the opposite polarity of the first magnetic induction unit and the 3rd magnetic induction unit, the opposite polarity of the second magnetic induction unit and the 4th magnetic induction unit, described first magnetic induction unit and the second magnetic induction unit or the 4th magnetic induction unit are disposed adjacent, and described second magnetic induction unit and the 4th magnetic induction unit or the second magnetic induction unit are disposed adjacent；The common port of described first magnetic induction unit and the 3rd magnetic induction unit passes sequentially through the first electric capacity and the first resistance connects the positive input terminal of the first operational amplifier, the not common end of the first magnetic induction unit and the not common end ground connection of the 3rd magnetic induction unit, the common port of described second magnetic induction unit and the 4th magnetic induction unit passes sequentially through the second electric capacity and the second resistance connects the negative input end of the first operational amplifier, the not common end of the second magnetic induction unit and the not common end ground connection of the 4th magnetic induction unit, the negative input end of described first operational amplifier connects the outfan of the first operational amplifier by the 4th resistance, described 4th electric capacity and the 4th resistor coupled in parallel；The positive input terminal of described first operational amplifier connects one end of the 6th electric capacity by the 3rd resistance, one end of 7th electric capacity, one end of 6th resistance and one end of the 7th resistance, the other end of described 7th electric capacity and the other end of the 7th resistance connect feeder ear, the other end of described 6th electric capacity and the other end ground connection of the 6th resistance, described 3rd electric capacity and the 3rd resistor coupled in parallel, the outfan of described first operational amplifier passes sequentially through the 5th electric capacity and the 5th resistance connects the negative input end stating the second operational amplifier, the negative input end of the second operational amplifier connects the outfan of the second operational amplifier by the 11st resistance, described tenth electric capacity and the 11st resistor coupled in parallel, the positive input terminal of described second operational amplifier connects one end of the 8th electric capacity by the 8th resistance, one end of 9th electric capacity, one end of 9th resistance and one end of the tenth resistance, the other end of described 8th electric capacity and the other end of the 9th electric capacity connect feeder ear, the other end of the 9th resistance and the other end ground connection of the tenth resistance.
8. the reading chinaware of wound core full bridge structure according to claim 5, it is characterized in that, also include circuit board and bonnet, described differential amplification module is arranged on described circuit board, described binding post is arranged on circuit board, electrically connects with differential amplification module through described bonnet, described circuit board is provided with pin, electrically connects with the primary processor of anti-counterfeiting detection equipment.
9. the reading chinaware of wound core full bridge structure according to claim 8, it is characterised in that be provided with epoxy resin insulating layers on described circuit board, described epoxy resin insulating layers covers a part for described differential amplification module, the end of binding post and pin.
10. the reading chinaware of wound core full bridge structure according to claim 1, it is characterised in that described sense channel is 16, the work surface of described shell is provided with 32 grooves coordinated with the installing rack of anti-counterfeiting detection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620024801.6U CN205354179U (en) | 2016-01-12 | 2016-01-12 | Coil magnetic core full -bridge structure reads magnetism ware |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620024801.6U CN205354179U (en) | 2016-01-12 | 2016-01-12 | Coil magnetic core full -bridge structure reads magnetism ware |
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| Publication Number | Publication Date |
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| CN205354179U true CN205354179U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620024801.6U Withdrawn - After Issue CN205354179U (en) | 2016-01-12 | 2016-01-12 | Coil magnetic core full -bridge structure reads magnetism ware |
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| Country | Link |
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| CN (1) | CN205354179U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107564724A (en) * | 2017-10-27 | 2018-01-09 | 厦门振泰成科技有限公司 | A kind of multistation loader of permalloy magnetic core |
-
2016
- 2016-01-12 CN CN201620024801.6U patent/CN205354179U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105574982B (en) * | 2016-01-12 | 2018-09-25 | 深圳粤宝电子科技有限公司 | A kind of reading chinaware of wound core full bridge structure |
| CN107564724A (en) * | 2017-10-27 | 2018-01-09 | 厦门振泰成科技有限公司 | A kind of multistation loader of permalloy magnetic core |
| CN107564724B (en) * | 2017-10-27 | 2023-11-28 | 厦门振泰成科技有限公司 | Multi-station chip loader for permalloy magnetic cores |
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Granted publication date: 20160629 Effective date of abandoning: 20180925 |