CN215868014U - Magnetic head with high sensitivity - Google Patents
Magnetic head with high sensitivity Download PDFInfo
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- CN215868014U CN215868014U CN202121587573.0U CN202121587573U CN215868014U CN 215868014 U CN215868014 U CN 215868014U CN 202121587573 U CN202121587573 U CN 202121587573U CN 215868014 U CN215868014 U CN 215868014U
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- 230000035945 sensitivity Effects 0.000 title claims abstract description 10
- 230000006698 induction Effects 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000005389 magnetism Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Abstract
The invention relates to the field of magnetic heads, in particular to a magnetic head with high sensitivity, which comprises a shielding cover, wherein supports are fixed on two sides in the shielding cover, a gap is arranged between the two supports, magnets and coils are arranged in the two supports, the two magnets are symmetrically arranged on two sides of the gap, the two coils are arranged between the two magnets and are also symmetrically arranged on two sides of the gap, a magnetic gasket is fixed in the gap below the coil, and a wear-resistant sheet is fixed in the gap above the coil. When the coil passes through alternating current, the coil position produces the magnetic field, the magnetic field that the coil produced and magnet and magnetic gasket produced superposes in wear pad position, the line is concentrated and the magnetic field scope increase is felt to magnetism in the wear pad position, produces the vortex when the magnetic stripe passes through this magnetic field on the RMB, because the line is felt to magnetism is intensive and the magnetic field scope is bigger, the pulse induction vortex that the RMB produced when passing through is obvious, detects easier detection pulse induction vortex through detection device on the counterfeit money detector.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of magnetic heads, in particular to a magnetic head with high sensitivity.
[ background of the invention ]
A banknote validator is a machine that verifies the authenticity of banknotes and counts the number of banknotes. Due to the huge cash circulation scale and the heavy cash processing work of the bank cashier counter, the cash counter becomes an indispensable device, the counting and counterfeit identification are integrated, the counterfeit money manufacturing level is higher and higher along with the development of printing technology, copying technology and electronic scanning technology, and the counterfeit identification performance of the cash counter must be continuously improved. The banknote counting machines are classified into horizontal type banknote counting machines and vertical type banknote counting machines according to different movement tracks of banknotes. The false distinguishing means generally comprises three modes of fluorescence recognition, magnetic analysis and infrared penetration.
When a common currency detector works, magnetic anti-counterfeiting characteristic information recorded on a safety line of the RMB is read by a magnetic head assembled on the currency detector, the information is amplified by a circuit and then is sent to a Central Processing Unit (CPU) of the currency detector for processing, built-in software judges the authenticity and the denomination of the tested RMB according to parameters such as pulse width, frequency, spacing and the like of a read pulse waveform, but the existing magnetic head generates a magnetic field after passing through a coil on the magnetic head by alternating current, a magnetic strip on the RMB generates eddy current after passing through the magnetic field, the eddy current can generate an alternating magnetic field to influence the original magnetic field, the authenticity of the RMB is confirmed by detecting the change of the magnetic field by a detector on the currency detector, but the magnetic field is generated by the coil only, the magnetic field range is small, the magnetic field on the RMB is changed by time and time, and the phenomenon that the RMB cannot be detected and is judged as false currency easily occurs.
The invention is provided for overcoming the defects of the prior art.
[ summary of the invention ]
It is an object of the present invention to overcome the above-mentioned disadvantages of the prior art and to provide a magnetic head with high sensitivity.
The invention can be realized by the following technical scheme:
the invention discloses a magnetic head with high sensitivity, which comprises a shielding cover, wherein supports are fixed on two sides in the shielding cover, a gap is formed between the two supports, magnets and coils are arranged in the two supports, the two magnets are symmetrically arranged on two sides of the gap, the two coils are arranged between the two magnets and are also symmetrically arranged on two sides of the gap, a magnetic gasket is fixed in the gap below the coils, and a wear-resistant sheet is fixed in the gap above the coils. The magnets are symmetrically arranged on two sides below the wear-resistant piece, the magnets are superposed in the magnetic field at the position of the wear-resistant piece, the magnetic gasket is fixed at the position below the two magnets, the magnetic field at the position of the wear-resistant piece is pushed out outwards again through the magnetic field of the magnetic gasket, when the coil passes through alternating current, the coil generates the magnetic field, the magnetic field generated by the coil is superposed with the magnetic fields generated by the magnets and the magnetic gasket at the position of the wear-resistant piece again, the magnetic induction lines at the position of the wear-resistant piece are dense and the magnetic field range is enlarged, when the magnetic strip on the RMB passes through the magnetic field, eddy current is generated, because the magnetic induction lines are dense and the magnetic field range is larger, the pulse induction eddy current generated when the RMB passes through is obvious, and the pulse induction eddy current is detected more easily through a detection device on the currency detector.
Preferably, the bottoms of the wear-resistant pieces are flush with the inner wall of the upper end of the bracket. The magnetic resistance inside the two supports is smaller, and the magnetic field is larger.
Preferably, two coils are connected in series and then connected with pins at the bottom of the shielding case.
Compared with the prior art, the invention has the following advantages:
through setting up magnet and setting up the magnetic gasket in coil below in coil both sides, the magnetic field that the coil produced when alternating current passes through and the magnetic field stack that magnet and magnetic gasket produced, the magnetic field grow and the magnetic flux grow of wear pad position, the pulse induction vortex that the RMB produced when the wear pad position is obvious, detects the easier pulse induction vortex that detects through detection device on the counterfeit money detector, the true and false of more easy discernment RMB.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
in the figure: 1. a shield case; 2. a support; 3. a magnet; 4. a coil; 5. a wear resistant sheet; 6. a pin; 7. a magnetic spacer;
[ detailed description ] embodiments
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
as shown in fig. 1 to 3, the invention discloses a magnetic head with high sensitivity, which comprises a shielding cover 1, wherein supports 2 are fixed on two sides inside the shielding cover 1, a gap is arranged between the two supports 2, magnets 3 and coils 4 are arranged inside the two supports 2, the two magnets 3 are symmetrically arranged on two sides of the gap, the two coils 4 are arranged between the two magnets 3 and are also symmetrically arranged on two sides of the gap, magnetic gaskets 7 are fixed in the gap below the coils 4, and wear-resistant pieces 5 are fixed in the gap above the coils 4. The magnets 3 are symmetrically arranged on two sides below the wear-resistant piece 5, the magnetic fields of the magnets 3 at the positions of the wear-resistant pieces 5 are overlapped, the magnetic gasket 7 is fixed at the position below the position between the two magnets 3, the magnetic field at the position of the wear-resistant piece 5 is pushed out again through the magnetic field of the magnetic gasket 7, when the coil 4 passes through alternating current, the position of the coil 4 generates a magnetic field, the magnetic field generated by the coil 4 is overlapped with the magnetic fields generated by the magnets 3 and the magnetic gasket 7 at the position of the wear-resistant piece 5 again, the magnetic induction lines at the position of the wear-resistant piece 5 are dense and the magnetic field range is enlarged, when the magnetic strip on the RMB passes through the magnetic field, eddy current is generated, the magnetic induction lines are dense and the magnetic field range is larger, the pulse induction eddy current generated when the RMB passes through is obvious, and the pulse induction eddy current is detected more easily through a detection device on a currency detector.
Wherein, the bottom of the wear-resistant sheet 5 is flush with the inner wall of the upper end of the bracket 2.
Wherein, two coils 4 are connected in series and then are connected with a pin 6 at the bottom of the shielding case 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that a person skilled in the art can make various changes, modifications, substitutions and alterations to the embodiments without departing from the technical principles of the present invention, and such changes, modifications, substitutions and alterations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A high sensitivity magnetic head comprising a shield, characterized in that: the inner two sides of the shielding cover are both fixed with supports, a gap is formed between the two supports, magnets and coils are arranged inside the two supports, the two magnets are symmetrically arranged on the two sides of the gap, the two coils are arranged between the two magnets and symmetrically arranged on the two sides of the gap, magnetic gaskets are fixed in the gaps below the coils, and wear-resistant pieces are fixed in the gaps above the coils.
2. A high sensitivity magnetic head as claimed in claim 1, wherein: the bottom of the wear-resistant sheet is flush with the inner wall of the upper end of the bracket.
3. A high sensitivity magnetic head as claimed in claim 1, wherein: and the two coils are connected in series and then are connected with pins at the bottom of the shielding case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121587573.0U CN215868014U (en) | 2021-07-13 | 2021-07-13 | Magnetic head with high sensitivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121587573.0U CN215868014U (en) | 2021-07-13 | 2021-07-13 | Magnetic head with high sensitivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215868014U true CN215868014U (en) | 2022-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121587573.0U Active CN215868014U (en) | 2021-07-13 | 2021-07-13 | Magnetic head with high sensitivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215868014U (en) |
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2021
- 2021-07-13 CN CN202121587573.0U patent/CN215868014U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240425 Address after: Building 7-6, Block D, Nanzhudao Community, Zhudao Street Office, Huancui District, Weihai City, Shandong Province, 264200 Patentee after: Weihai Haimu Electronic Technology Co.,Ltd. Country or region after: China Address before: 341800 zone 2, QUANNAN Industrial Park, Ganzhou City, Jiangxi Province Patentee before: QUANNAN QUNYINGDA ELECTRONIC Co.,Ltd. Country or region before: China |