CN113625213A - Magnetic head sensitivity testing device - Google Patents

Abstract

The invention relates to the field of magnetic heads, in particular to a magnetic head sensitivity testing device, which comprises a bottom plate, a screw rod and a plurality of support rods are arranged above the bottom plate, the screw rod is driven by a transverse moving motor to rotate, a sliding plate is arranged above the bottom plate, a threaded pipe is fixed on the sliding plate at a position corresponding to the screw rod, the screw rod extends into the threaded pipe and is in threaded connection with the threaded pipe, the sliding plate is fixed with a supporting pipe at the position corresponding to the supporting rod, the support rod extends into the support tube and is connected with the support tube in a sliding way, one side of the sliding plate is provided with a screw rod I, the screw rod I is driven by a motor I to rotate, a sliding block in threaded connection with the screw rod I is arranged on the screw rod I, the magnetic strip shielding device is characterized in that a plurality of magnetic strips are uniformly fixed on the sliding block, shielding cases wrapping the magnetic strips are fixed on the sliding block at positions corresponding to the magnetic strips, and the magnetic permeability of each shielding case is different. The device can automatically detect the sensitivity of the magnetic head.

Description

Magnetic head sensitivity testing device

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of magnetic heads, in particular to a magnetic head sensitivity testing device.

[ 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.

Before the introduction of magnetic heads into the market, detailed and careful tests are required to ensure correct functioning of the heads and reliable compliance of the performance. The magnetic head that company designed, will go out of the factory to test once before dispatching from the factory, the magnetic head is put into test seat the inside, through the mode of punching the card, tests whether the magnetic head can normally respond to the magnetic card, if take the manual mode, not only inefficiency is high again with high costs, long-term manual punching the card, the speed of punching the card is not good to be controlled, the hand can not receive such long-time repetitive motion, has seriously influenced the efficiency of software testing of magnetic head.

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 head sensitivity testing apparatus.

The invention can be realized by the following technical scheme:

the invention discloses a magnetic head sensitivity testing device, which comprises a bottom plate, wherein a screw rod and a plurality of support rods are arranged above the bottom plate, the screw rod is driven to rotate by a transverse moving motor, a sliding plate is also arranged above the bottom plate, a threaded pipe is fixed on the sliding plate at a position corresponding to the screw rod, the screw rod extends into the threaded pipe and is in threaded connection with the threaded pipe, support pipes are fixed on the sliding plate at positions corresponding to the support rods, the support rods extend into the support pipes and are in sliding connection with the support pipes, a screw rod I is arranged on one side of the sliding plate and is driven to rotate by a motor I, a sliding block in threaded connection with the screw rod I is arranged on the screw rod I, a plurality of magnetic stripes are uniformly fixed on the sliding block, shielding covers for wrapping the magnetic stripes are fixed on the sliding block at positions corresponding to the magnetic stripes, the magnetic permeability of each shielding cover is different, and a screw rod II is also arranged on the bottom plate, lead screw II is rotated by II drives of motor, be provided with the slip table with II threaded connection of lead screw on the lead screw II, be provided with the support with the slip table joint on the slip table, evenly be provided with the fixed slot of fixed magnetic head on the support, still be fixed with the cylinder on the bottom plate, the piston rod end of cylinder is fixed with the push pedal, be fixed with the connecting plate in the push pedal, connecting plate one side still is provided with surveys test panel, be fixed with the gag lever post on surveying test panel, the gag lever post pass the connecting plate and with connecting plate sliding connection, still be fixed with spacing spring between connecting plate and the survey test panel, survey on survey test panel still be fixed with the magnetic head on PIN foot complex connect. Fixing a magnetic head to be tested on a support, clamping the support on a sliding table, when a first magnetic head on the support is opposite to a joint position, a piston rod on an air cylinder extends, the joint is close to a PIN foot on the magnetic head to move, the joint and the PIN foot of the magnetic head are assembled with each other, a motor I drives a screw rod I to rotate, because the screw rod I is in threaded connection with the sliding table, a first magnetic strip on a sliding block is opposite to the tested magnetic head position, a transverse moving motor drives the screw rod to rotate, because the screw rod is in threaded connection with a threaded pipe, when the screw rod rotates, the sliding block moves away from the tested magnetic head, the magnetic strip forms an eddy current in a magnetic field of the magnetic head, the aim of sensing the magnetic strip by the magnetic head is achieved by sensing the eddy current by a sensing chip on the magnetic head, so that the test of the magnetic head is realized, the magnetic strip moves away from the tested magnetic head, after the magnetic strip moves to a certain distance, the magnetic head cannot sense the magnetic strip, so that the sensitivity of the magnetic head can be confirmed, after the first magnetic strip moves, the magnetic head can still sense the eddy current generated by the magnetic strip, the motor I drives the screw rod I to rotate again, and the transverse moving motor drives the screw rod to rotate again, so that the eddy current generated by the second magnetic strip in the magnetic field of the magnetic head is sensed again through the magnetic head, the operation is circulated until the magnetic strip cannot be sensed by the magnetic head, the magnetic strip is covered by the shielding cover which is wrapped by the magnetic strip, the magnetic conductivity of the shielding cover is gradually increased, the eddy current effect generated by the shielding cover with high magnetic conductivity is utilized to attenuate the electromagnetic field, the eddy current can also generate the magnetic field to counteract the magnetic field of the magnetic strip, the magnetic field radiated by the magnetic strip is attenuated, the magnetic head can still sense the magnetic strip content, the sensitivity of the magnetic head is high, after the first magnetic head is tested, the cylinder is started, the piston rod on the cylinder is shortened, the joint is separated from the magnetic head, the motor II is started, the second magnetic head to be tested reaches the joint position, the sensitivity of the magnetic head is detected again, the operation is circulated, the sensitivity of the magnetic head can be automatically detected through the device, manual handheld test is not needed, the test efficiency is greatly improved, and the labor cost is reduced.

Preferably, the limiting rod is fixed with a limiting block at the tail end.

Preferably, a plurality of positioning rods are further uniformly fixed on the test board, and the positioning rods penetrate through the connecting plate and are in sliding connection with the connecting plate.

Preferably, a plurality of sliding rods are further fixed on the bottom plate, and the sliding rods penetrate through the sliding table and are in sliding connection with the sliding table.

Compared with the prior art, the invention has the following advantages:

the device can automatically detect the sensitivity of the magnetic head without manual handheld test, thereby greatly improving the test efficiency and reducing the labor cost.

[ 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 first angular configuration of the present invention;

FIG. 2 is a second angular configuration of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3; .

FIG. 5 is an enlarged view of FIG. 1 at B;

in the figure: 1. a base plate; 2. a threaded pipe; 3. a traversing motor; 4. a support bar; 5. a slide plate; 6. supporting a tube; 7. a screw rod I; 8. a motor I; 9. a slider; 10. a shield case; 11. a magnetic strip; 12. a screw; 13. ascrew rod 2; 14. a slide bar; 15. amotor 2; 16. a sliding table; 17. a support; 18. fixing grooves; 19. a magnetic head; 20. a PIN PIN; 21. a cylinder; 22. pushing the plate; 23. a connecting plate; 24. a test board; 25. a joint; 26. a limiting spring; 27. a limiting rod; 28. a limiting block; 29. positioning a rod;

[ detailed description ] embodiments

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

as shown in figures 1 to 5, the invention discloses a magnetic head sensitivity testing device, which comprises abottom plate 1, wherein ascrew 12 and a plurality ofsupport rods 4 are arranged above thebottom plate 1, thescrew 12 is driven by a traversingmotor 3 to rotate, asliding plate 5 is also arranged above thebottom plate 1, a threadedpipe 2 is fixed on thesliding plate 5 corresponding to thescrew 12, thescrew 12 extends into the threadedpipe 2 and is in threaded connection with the threadedpipe 2,support pipes 6 are fixed on thesliding plate 5 corresponding to thesupport rods 4, thesupport rods 4 extend into thesupport pipes 6 and are in sliding connection with thesupport pipes 6, a screw I7 is arranged on one side of thesliding plate 5, the screw I7 is driven by a motor I8 to rotate, a slidingblock 9 in threaded connection with the screw I7 is arranged on the screw I7, a plurality ofmagnetic stripes 11 are uniformly fixed on thesliding block 9, andshielding cases 10 wrapping themagnetic stripes 11 are fixed on the slidingblock 9 corresponding to themagnetic stripes 11, the magnetic permeability of eachshielding case 10 is different, a screw rod II 13 is further arranged on thebottom plate 1, the screw rod II 13 is driven to rotate by a motor II 15, a sliding table 16 in threaded connection with the screw rod II 13 is arranged on the screw rod II 13, asupport 17 clamped with the sliding table 16 is arranged on the sliding table 16, afixing groove 18 for fixing amagnetic head 19 is uniformly formed in thesupport 17, anair cylinder 21 is further fixed on thebottom plate 1, apush plate 22 is fixed at the tail end of a piston rod of theair cylinder 21, a connectingplate 23 is fixed on thepush plate 22, atesting plate 24 is further arranged on one side of the connectingplate 23, alimiting rod 27 is fixed on thetesting plate 24, thelimiting rod 27 penetrates through the connectingplate 23 and is in sliding connection with the connectingplate 23, alimiting spring 26 is further fixed between the connectingplate 23 and thetesting plate 24, and ajoint 25 matched with aPIN foot 20 on themagnetic head 19 is further fixed on thetesting plate 24. Fixing amagnetic head 19 to be tested on asupport 17, clamping thesupport 17 on a sliding table 16, when a firstmagnetic head 19 on thesupport 17 is opposite to ajoint 25, a piston rod on anair cylinder 21 extends, the joint 25 moves close to aPIN 20 on themagnetic head 19, thejoint 25 and thePIN 20 of themagnetic head 19 are mutually assembled, a motor I8 drives a screw rod I7 to rotate, because the screw rod I7 is in threaded connection with the sliding table 16, a firstmagnetic strip 11 on asliding block 9 is opposite to the position of themagnetic head 19 to be tested, a traversingmotor 3 drives ascrew rod 12 to rotate, because thescrew rod 12 is in threaded connection with a threadedpipe 2, when thescrew rod 12 rotates, the slidingblock 9 moves away from themagnetic head 19 to be tested, themagnetic strip 11 forms an eddy current in a magnetic field of themagnetic head 19, the purpose that themagnetic head 19 senses themagnetic strip 11 is realized by sensing a sensing chip on themagnetic head 19, so as to realize the testing of themagnetic head 19, themagnetic strip 11 moves away from themagnetic head 19 to be tested, and after themagnetic strip 11 moves to a certain distance, themagnetic head 19 can not sense themagnetic strip 11, so that the sensitivity of themagnetic head 19 can be confirmed, after the firstmagnetic strip 11 moves, themagnetic head 19 can still sense the eddy current generated by themagnetic strip 11, the motor I8 drives the screw rod I7 to rotate again, and thetraverse motor 3 drives thescrew rod 12 to rotate again, so that the eddy current generated by the secondmagnetic strip 11 in the magnetic field of themagnetic head 19 is sensed again through themagnetic head 19, the operation is circulated until themagnetic head 19 can not sense themagnetic strip 11, themagnetic strip 11 is wrapped by theshielding cover 10 covering themagnetic strip 11, the magnetic permeability of theshielding cover 10 is gradually increased, the electromagnetic field is attenuated by using the eddy current effect generated by theshielding cover 10 with high magnetic permeability, the eddy current can also generate a magnetic field to counteract the magnetic field of themagnetic strip 11, so that the magnetic field radiated by themagnetic strip 11 can be attenuated, after the magnetic field is attenuated, themagnetic head 19 can still sense the content of themagnetic strip 11, the sensitivity of themagnetic head 19 is high, after the test of the firstmagnetic head 19 is completed, theair cylinder 21 is started, the piston rod on theair cylinder 21 is shortened, thejoint 25 is separated from themagnetic head 19, the motor II 15 is started, the secondmagnetic head 19 to be tested reaches the position of thejoint 25, the sensitivity of themagnetic head 19 is detected again, the circular operation is carried out, the sensitivity of themagnetic head 19 can be automatically detected through the device, the manual handheld test is not needed, the test efficiency is greatly improved, and the labor cost is reduced.

Wherein, thelimiting block 28 is fixed at the tail end of thelimiting rod 27.

Wherein, still evenly be fixed with many locatinglevers 29 on thetest board 24, locatinglever 29passes connecting plate 23 and with connectingplate 23 sliding connection.

Wherein, still be fixed withmany slide bars 14 on thebottom plate 1,slide bar 14 passes slip table 16 and with slip table 16 sliding connection.

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 (7)

1. A magnetic head sensitivity testing device comprises a bottom plate, and is characterized in that: the magnetic head fixing device is characterized in that a screw rod is arranged above the bottom plate and driven to rotate by a transverse moving motor, a sliding plate is further arranged above the bottom plate, a threaded pipe is fixed on the sliding plate at a position corresponding to the screw rod, the screw rod extends into the threaded pipe and is in threaded connection with the threaded pipe, a screw rod I is arranged on one side of the sliding plate and driven to rotate by the motor I, a sliding block in threaded connection with the screw rod I is arranged on the screw rod I, a plurality of magnetic stripes are uniformly fixed on the sliding block, shielding covers wrapping the magnetic stripes are fixed on the sliding block at positions corresponding to the magnetic stripes, the magnetic permeability of each shielding cover is different, a screw rod II is further arranged on the bottom plate and driven to rotate by the motor II, a sliding table in threaded connection with the screw rod II is arranged on the screw rod II, a fixing groove for fixing the magnetic head is uniformly arranged on the sliding table, and an air cylinder is further fixed on the bottom plate, the terminal push pedal that is fixed with of piston rod of cylinder, be fixed with the connecting plate in the push pedal, connecting plate one side still is provided with surveys test panel, still be fixed with on the test panel with the magnetic head on PIN foot complex connect.

2. A head sensitivity test apparatus according to claim 1, wherein: and a plurality of positioning rods are uniformly fixed on the test board and penetrate through the connecting plate to be in sliding connection with the connecting plate.

3. A head sensitivity test apparatus according to claim 1, wherein: and a plurality of sliding rods are further fixed on the bottom plate, penetrate through the sliding table and are in sliding connection with the sliding table.

4. A head sensitivity test apparatus according to claim 1, wherein: the supporting rods are arranged above the bottom plate, supporting tubes are fixed on the sliding plate at positions corresponding to the supporting rods, and the supporting rods extend into the supporting tubes and are in sliding connection with the supporting tubes.

5. A head sensitivity test apparatus according to claim 1, wherein: the sliding table is provided with a support clamped with the sliding table, and the support is evenly provided with a fixing groove for fixing the magnetic head.

6. A head sensitivity test apparatus according to claim 1, wherein: a limiting rod is fixed on the test board, penetrates through the connecting board and is in sliding connection with the connecting board, and a limiting spring is further fixed between the connecting board and the test board.

7. The head sensitivity test apparatus according to claim 6, wherein: and the tail end of the limiting rod is also fixed with a limiting block.

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