A magnetic head sensitivity testing device

Abstract

The present invention relates to the field of magnetic heads, and particularly to a magnetic head sensitivity testing device, which includes a bottom plate. Above the bottom plate, a screw rod and multiple support rods are provided. The screw rod is driven to rotate by a transverse movement motor. Above the bottom plate, a sliding plate is also provided. At a position corresponding to the screw rod on the sliding plate, a threaded tube is fixed. The screw rod extends into the threaded tube and is in threaded connection with the threaded tube. At positions corresponding to the support rods on the sliding plate, support tubes are fixed respectively. The support rods extend into the support tubes and are in sliding connection with the support tubes. On one side of the sliding plate, a lead screw I is provided. The lead screw I is driven to rotate by a motor I. On the lead screw I, a slider in threaded connection with the lead screw I is provided. A plurality of magnetic strips are evenly fixed on the slider. Shielding covers wrapping the magnetic strips are fixed at positions corresponding to the magnetic strips on the slider. The magnetic permeability of each of the shielding covers is different. Through this device, the sensitivity of the magnetic head can be automatically detected.

Description

Technical Field

[0001] The present invention relates to the field of magnetic heads, and in particular to a magnetic head sensitivity testing device.

Background Art

[0002] A banknote counter is a machine for verifying the authenticity of banknotes and counting the number of banknotes. Due to the large scale of cash circulation and the heavy workload of cash handling at bank teller counters, banknote counters have become indispensable equipment, integrating counting and counterfeiting detection. With the development of printing technology, copying technology, and electronic scanning technology, the level of counterfeit banknote manufacturing is getting higher and higher, and it is necessary to continuously improve the counterfeiting detection performance of banknote counters. According to the different trajectories of banknote movement, banknote counters are divided into horizontal and vertical types. The counterfeiting detection means usually include three methods: fluorescence recognition, magnetic analysis, and infrared penetration.

[0003] Before the magnetic head is introduced into the market, detailed and careful tests are required to ensure the correct function and reliable performance of the magnetic head. The magnetic heads designed by the company need to undergo an ex-factory test before leaving the factory. The magnetic head is placed in the test seat, and whether the magnetic head can normally sense the magnetic card is tested by swiping the card. If the manual method is adopted, not only is the efficiency low, but the cost is also high. For long-term manual card swiping, the card swiping speed is not easy to control, and the hand cannot withstand such repeated movements for a long time, which seriously affects the testing efficiency of the magnetic head.

[0004] The present invention is studied and proposed in view of the deficiencies of the prior art.

Summary of the Invention

[0005] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a magnetic head sensitivity testing device.

[0006] The present invention can be realized by the following technical solutions:

[0007] The present invention discloses a magnetic head sensitivity testing device, which includes a bottom plate. Above the bottom plate, a screw rod and multiple support rods are provided. The screw rod is driven to rotate by a transverse movement motor. Above the bottom plate, a sliding plate is also provided. At a position corresponding to the screw rod on the sliding plate, a threaded pipe is fixed. The screw rod extends into the threaded pipe and is threadedly connected to the threaded pipe. At positions corresponding to the support rods on the sliding plate, support pipes are fixed respectively. The support rods extend into the support pipes and are slidably connected to the support pipes. On one side of the sliding plate, a lead screw I is provided. The lead screw I is driven to rotate by a motor I. On the lead screw I, a slider threadedly connected to the lead screw I is provided. A plurality of magnetic strips are evenly fixed on the slider. At positions corresponding to the magnetic strips on the slider, shielding covers wrapping the magnetic strips are fixed respectively. The magnetic permeability of each of the shielding covers is different. On the bottom plate, a lead screw II is also provided. The lead screw II is driven to rotate by a motor II. On the lead screw II, a slide table threadedly connected to the lead screw II is provided. On the slide table, a bracket clamped to the slide table is provided. On the bracket, fixing grooves for fixing magnetic heads are evenly provided. On the bottom plate, a cylinder is also fixed. The end of the piston rod of the cylinder is fixed with a push plate. A connecting plate is fixed on the push plate. On one side of the connecting plate, a test plate is also provided. A limiting rod is fixed on the test plate. The limiting rod passes through the connecting plate and is slidably connected to the connecting plate. A limiting spring is also fixed between the connecting plate and the test plate. On the test plate, a connector matching with the PIN pins on the magnetic head is also fixed.Fix the magnetic head to be tested on the bracket, and clamp the bracket on the sliding table. When the first magnetic head on the bracket is exactly aligned with the connector position, the piston rod on the cylinder extends, and the connector moves close to the PIN pins on the magnetic head. The connector and the PIN pins of the magnetic head are assembled with each other. Motor I drives the lead screw I to rotate. Since the lead screw I is threadedly connected to the sliding table, the first magnetic stripe on the slider is exactly aligned with the position of the magnetic head to be tested. The transverse movement motor drives the screw to rotate. Since the screw is threadedly connected to the threaded tube, when the screw rotates, the slider moves away from the magnetic head to be tested. Eddy currents are formed in the magnetic field of the magnetic head by the magnetic stripe, and the eddy currents are sensed by the induction chip on the magnetic head to achieve the purpose of the magnetic head sensing the magnetic stripe, thereby realizing the test of the magnetic head. The magnetic stripe moves away from the magnetic head to be tested. After the magnetic stripe moves a certain distance, the magnetic head cannot sense the magnetic stripe, so the sensitivity of the magnetic head can be confirmed. After the first magnetic stripe moves, the magnetic head can still sense the eddy currents generated by the magnetic stripe. Motor I drives the lead screw I to rotate again, and the transverse movement motor drives the screw to rotate again, so as to sense the eddy currents generated by the second magnetic stripe in the magnetic field of the magnetic head through the magnetic head again. The operation is cycled until the magnetic head cannot sense the magnetic stripe. By covering the magnetic stripe with a shielding cover that wraps the magnetic stripe, and the magnetic permeability of the shielding cover gradually increases, the eddy current effect generated by the shielding cover with high magnetic permeability is used to attenuate the electromagnetic field, and the eddy currents themselves will also generate a magnetic field to cancel the magnetic field of the magnetic stripe, thereby realizing the attenuation of the magnetic field radiated by the magnetic stripe. After the magnetic field is attenuated, the magnetic head can still sense the content of the magnetic stripe, and the sensitivity of the magnetic head is high. After the test of the first magnetic head is completed, the cylinder is started, the piston rod on the cylinder shortens, and the connector is separated from the magnetic head. Motor II is started, and the second magnetic head to be tested reaches the connector position, and the sensitivity of the magnetic head is detected again. The operation is cycled. Through this device, the sensitivity of the magnetic head can be automatically detected without manual holding for testing, which greatly improves the testing efficiency and reduces the labor cost.

[0008] Preferably, a limit block is further fixed at the end of the limit rod.

[0009] Preferably, a plurality of positioning rods are evenly fixed on the test plate, and the positioning rods pass through the connecting plate and are slidably connected to the connecting plate.

[0010] Preferably, a plurality of sliding rods are fixed on the bottom plate, and the sliding rods pass through the sliding table and are slidably connected to the sliding table.

[0011] The present invention has the following advantages compared with the existing technology:

[0012] Through this device, the sensitivity of the magnetic head can be automatically detected without manual holding for testing, which greatly improves the testing efficiency and reduces the labor cost.

Description of the Drawings

[0013] The following further details the specific embodiments of the present invention in conjunction with the drawings, wherein:

[0014] Figure 1Schematic diagram of the first angle structure of the present invention;

[0015] Figure 2 Schematic diagram of the second angle structure of the present invention;

[0016] Figure 3 Top view of the present invention;

[0017] Figure 4 is Figure 3 Cross-sectional view taken along A-A in;.

[0018] Figure 5 is Figure 1 Enlarged view at B in;

[0019] In the figure: 1, bottom plate; 2, threaded pipe; 3, transverse movement motor; 4, support rod; 5, slide plate; 6, support pipe; 7, lead screw I; 8, motor I; 9, slider; 10, shielding cover; 11, magnetic strip; 12, screw; 13, lead screw 2; 14, slide rod; 15, motor 2; 16, slide table; 17, bracket; 18, fixed groove; 19, magnetic head; 20, PIN foot; 21, air cylinder; 22, push plate; 23, connecting plate; 24, test plate; 25, joint; 26, limit spring; 27, limit rod; 28, limit block; 29, positioning rod;

Specific implementation manner

[0020] The following will describe in detail the implementation manner of the present invention with reference to the accompanying drawings:

[0021] Such as Figures 1 to 5As shown in the figure, the present invention discloses a magnetic head sensitivity testing device, which includes a bottom plate 1. Above the bottom plate 1, a screw rod 12 and multiple support rods 4 are provided. The screw rod 12 is driven to rotate by a transverse movement motor 3. Above the bottom plate 1, a sliding plate 5 is also provided. At a position corresponding to the screw rod 12 on the sliding plate 5, a threaded tube 2 is fixed. The screw rod 12 extends into the threaded tube 2 and is threadedly connected to the threaded tube 2. At positions corresponding to the support rods 4 on the sliding plate 5, support tubes 6 are fixed. The support rods 4 extend into the support tubes 6 and are slidably connected to the support tubes 6. On one side of the sliding plate 5, a lead screw I 7 is provided. The lead screw I 7 is driven to rotate by a motor I 8. On the lead screw I 7, a slider 9 threadedly connected to the lead screw I 7 is provided. A plurality of magnetic strips 11 are uniformly fixed on the slider 9. At positions corresponding to the magnetic strips 11 on the slider 9, shielding covers 10 wrapping the magnetic strips 11 are fixed. The magnetic permeability of each shielding cover 10 is different. On the bottom plate 1, a lead screw II 13 is also provided. The lead screw II 13 is driven to rotate by a motor II 15. On the lead screw II 13, a slide table 16 threadedly connected to the lead screw II 13 is provided. On the slide table 16, a bracket 17 clamped to the slide table 16 is provided. On the bracket 17, fixing grooves 18 for fixing magnetic heads 19 are uniformly provided. On the bottom plate 1, a cylinder 21 is also fixed. The end of the piston rod of the cylinder 21 is fixed with a push plate 22. A connecting plate 23 is fixed on the push plate 22. On one side of the connecting plate 23, a test plate 24 is also provided. A limiting rod 27 is fixed on the test plate 24. The limiting rod 27 passes through the connecting plate 23 and is slidably connected to the connecting plate 23. A limiting spring 26 is also fixed between the connecting plate 23 and the test plate 24. On the test plate 24, a connector 25 matching with the PIN pins 20 on the magnetic head 19 is also fixed.Fix the magnetic head 19 to be tested on the bracket 17, and snap the bracket 17 onto the sliding table 16. When the first magnetic head 19 on the bracket 17 is directly opposite the position of the connector 25, the piston rod on the cylinder 21 extends, and the connector 25 moves closer to the PIN foot 20 on the magnetic head 19. The connector 25 and the PIN foot 20 of the magnetic head 19 are assembled with each other. The motor I 8 drives the lead screw I 7 to rotate. Since the lead screw I 7 is threadedly connected to the sliding table 16, the first magnetic strip 11 on the slider 9 is directly opposite the position of the magnetic head 19 to be tested. The transverse movement motor 3 drives the screw 12 to rotate. Since the screw 12 is threadedly connected to the threaded tube 2, when the screw 12 rotates, the slider 9 moves away from the magnetic head 19 to be tested. The magnetic strip 11 forms eddy currents in the magnetic field of the magnetic head 19. The induction chip on the magnetic head 19 is used to sense the eddy currents, so as to achieve the purpose of the magnetic head 19 sensing the magnetic strip 11, and thus realize the test of the magnetic head 19. The magnetic strip 11 moves away from the magnetic head 19 to be tested. After the magnetic strip 11 moves a certain distance, the magnetic head 19 cannot sense the magnetic strip 11, so the sensitivity of the magnetic head 19 can be confirmed. After the first magnetic strip 11 moves, the magnetic head 19 can still sense the eddy currents generated by the magnetic strip 11. The motor I 8 drives the lead screw I 7 to rotate again, and the transverse movement motor 3 drives the screw 12 to rotate again, so as to sense the eddy currents generated by the second magnetic strip 11 in the magnetic field of the magnetic head 19 through the magnetic head 19 again, and perform cyclic operation until the magnetic head 19 cannot sense the magnetic strip 11. By covering the magnetic strip 11 with a shielding cover 10 that wraps the magnetic strip 11, and the magnetic permeability of the shielding cover 10 gradually increases, the eddy current effect generated by the shielding cover 10 with high magnetic permeability is used to attenuate the electromagnetic field, and the eddy currents themselves will also generate a magnetic field to cancel the magnetic field of the magnetic strip 11, so as to achieve the attenuation of the magnetic field radiated by the magnetic strip 11. After the magnetic field is attenuated, the magnetic head 19 can still sense the content of the magnetic strip 11, and the magnetic head 19 has high sensitivity. After the test of the first magnetic head 19 is completed, the cylinder 21 is started, the piston rod on the cylinder 21 shortens, the connector 25 is separated from the magnetic head 19, the motor II 15 is started, the second magnetic head 19 to be tested reaches the position of the connector 25, and the sensitivity of the magnetic head 19 is detected again, and cyclic operation is performed. Through this device, the sensitivity of the magnetic head 19 can be automatically detected without manual holding for testing, which greatly improves the testing efficiency and reduces the labor cost.

[0022] Wherein, a limit block 28 is also fixed at the end of the limit rod 27.

[0023] Wherein, a plurality of positioning rods 29 are evenly fixed on the test plate 24. The positioning rods 29 pass through the connecting plate 23 and are slidably connected to the connecting plate 23.

[0024] Wherein, a plurality of sliding rods 14 are also fixed on the bottom plate 1. The sliding rods 14 pass through the sliding table 16 and are slidably connected to the sliding table 16.

[0025] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, various changes, modifications, substitutions and variations can be made to these embodiments, and these changes, modifications, substitutions and variations should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic head sensitivity testing device, comprising a bottom plate, Characterized in that: A screw rod is arranged above the bottom plate, the screw rod is driven to rotate by a transverse movement motor, a sliding plate is also arranged above the bottom plate, a threaded pipe is fixed at a position corresponding to the screw rod on the sliding plate, the screw rod extends into the threaded pipe and is in threaded connection with the threaded pipe, a lead screw I is arranged on one side of the sliding plate, the lead screw I is driven to rotate by a motor I, a slider threadedly connected with the lead screw I is arranged on the lead screw I, a plurality of magnetic strips are uniformly fixed on the slider, shielding covers wrapping the magnetic strips are fixed at positions corresponding to the magnetic strips on the slider, the magnetic permeability of each shielding cover is different, a lead screw II is also arranged on the bottom plate, the lead screw II is driven to rotate by a motor II, a slide table threadedly connected with the lead screw II is arranged on the lead screw II, fixing grooves for fixing magnetic heads are uniformly arranged on the slide table, a cylinder is also fixed on the bottom plate, a push plate is fixed at the end of the piston rod of the cylinder, a connecting plate is fixed on the push plate, a test plate is also arranged on one side of the connecting plate, connectors matching with the PIN pins on the magnetic head are fixed on the test plate, a plurality of positioning rods are uniformly fixed on the test plate, the positioning rods pass through the connecting plate and are slidably connected with the connecting plate, and a plurality of slide rods are also fixed on the bottom plate, the slide rods pass through the slide table and are slidably connected with the slide table.

2. The magnetic head sensitivity testing device according to claim 1, Characterized in that: A plurality of support rods are arranged above the bottom plate, support pipes are fixed at positions corresponding to the support rods on the sliding plate, the support rods extend into the support pipes and are slidably connected with the support pipes.

3. The magnetic head sensitivity testing device according to claim 1, Characterized in that: A bracket clamped with the slide table is arranged on the slide table, and fixing grooves for fixing magnetic heads are uniformly arranged on the bracket.

4. The magnetic head sensitivity testing device according to claim 1, Characterized in that: A limiting rod is fixed on the test plate, the limiting rod passes through the connecting plate and is slidably connected with the connecting plate, and a limiting spring is also fixed between the connecting plate and the test plate.

5. The magnetic head sensitivity testing device according to claim 4, Characterized in that: A limiting block is also fixed at the end of the limiting rod.

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