阅读说明：本技术 一种灵敏度高的磁头 (Magnetic head with high sensitivity ) 是由 梁志吉 于 2021-07-13 设计创作，主要内容包括：本发明涉及磁头领域,尤其涉及一种灵敏度高的磁头,包括屏蔽罩,所述屏蔽罩内部两侧均固定有支架,两个支架之间设置有间隙,两个支架内部均设置有磁铁和线圈,两个磁铁对称设置在间隙两侧,两个线圈设置在两个磁铁之间并且也对称设置在间隙两侧,所述线圈下方的间隙内固定有磁性垫片,所述线圈上方的间隙内固定有耐磨片。线圈通过交变电流时,线圈位置产生磁场,线圈产生的磁场与磁铁及磁性垫片产生的磁场在耐磨片位置叠加,耐磨片位置的磁感线变密集并且磁场范围增大,当人民币上磁条经过此磁场时产生涡流,由于磁感线密集并且磁场范围更大,人民币经过时产生的脉冲感应涡流明显,通过验钞机上检测装置检测更容易的检测到脉冲感应涡流。(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.)

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.

[ 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.

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.