CN201402315Y

CN201402315Y - Novel magnet identification sensor

Info

Publication number: CN201402315Y
Application number: CN2009200385352U
Authority: CN
Inventors: 丁加春
Original assignee: Nanjing New Zhongxu Microelectronics CO Ltd
Current assignee: Nanjing New Zhongxu Microelectronics CO Ltd
Priority date: 2009-01-13
Filing date: 2009-01-13
Publication date: 2010-02-10
Anticipated expiration: 2019-01-13

Abstract

The utility model relates to a novel magnet identification sensor, which comprises a 24-channel panoramic seamless magnetic strip (1) and a signal conditioning circuit board (2); 24 InSb magnetic resistance chips are arranged in a 24-channel magnetic strip metal shell, and are kept flat on a permanent-magnet and are shaped like a Chinese character 'pin' (realizing seamless), and are connected withan upper base pin. When the entire surface of the note passes through the surface of a magnetic chips shell, each channel in the 24 channels relatively generates very weak signals which are amplified, filtered and digital processed at the signal conditioning circuit board, and then the corresponding magnetic codes are formed and output. The seamless connection is formed between the channels, the24-channels magnetic codes are gathered together to form a panoramic, seamless, high-density magnetic anti-counterfeiting distribution map for the whole note. Further more, true and false of the notecan be identified, thereby avoiding misjudging caused by that presence or absence of magnetism in fixed region is simply identified in the traditional method.

Description

A kind of novel magnetic identification sensor

Technical field

The utility model relates to a kind of novel magnetic identification sensor, is used to detect the true and false magnetic identification sensing conditioning system of magnetic ink check bank note on the bank note, especially can all scan magnetic gray scale figure complicated on the bank note, mark etc.

Background technology

At present, known mistor magnetic identification sensor is to be made of InSb mistor, permanent magnet, shell, pin, when the bank note magnetic part when case surface is streaked, InSb mistor value changes, and then produces corresponding signal and change.But present this sensor width deficiency, number of channels is low and resolution is not high, can only detect a part of magnetic distribution in the bank note, and the false proof signal of magnetic is extremely faint on the bank note, and complex distribution distributes and the magnetic gray scale so this mode can not reflect entire paper coin magnetic.Easy like this causing misjudgment.Especially the dollar of magnetic distribution more complicated, more difficult resolution.

The utility model content

1, technical matters to be solved:

Can not detect bank note, the distribution that can not high-resolutionly measure magnetic on the bank note by panorama in order to overcome existing mistor magnetic identification sensor; The utility model provides a kind of novel magnetic identification sensor.

2, technical scheme:

The utility model comprises 24 passage panoramic seamless crack magnetic stripe 1 and signal conditioning circuit plate 2 two parts; In the 24 passage magnetic stripe metal shells, with 24 InSb mistor chips, so that " product " arrange with seamless form and lie in above the permanent magnet pin in the connection by font.Each passage of described 24 passages is to be connected to the end of oppisite phase of input resistance R1 to amplifier IC1 by InSb mistor MR1 and the MR2 mode by capacitor C 1 AC coupling, R2, R3 series connection is connected on power supply and ground respectively, the centre links to each other with the in-phase end of IC1, R4 is the feedback resistance of IC1, C3 is a filter capacitor, the IC1 output terminal is connected to second level input resistance R5 by the mode of C2 AC coupling again, R5 is connected to IC2, resistance R 6, potentiometer R, thermistor Rt constitute the backfeed loop of IC2, are connected to end of oppisite phase and the output terminal of IC2.The IC2 output terminal is connected to 8 tunnels analogy switches wherein can connect the signal that 8 passage InSb mistors produce by IC1, the amplification of IC2 two-stage on the input port; One has three 8 tunnels analogy K switch 3, K4, K5 has 24 passages, can connect the signal of the InSb mistor generation of 24 corresponding passages; It is to select analog switch by code translator IC6 that the output of each passage is selected, and selects concrete passage output by analog switch K3, K4, K5 again.The output of three analog switch K3, K4, K5 is connected to the in-phase end of IC7 by resistance R 7, R8, R9 and R10, and the IC7 end of oppisite phase links to each other with output terminal to form and follows, and is connected to output terminal at last.

3, beneficial effect:

The utility model carries out all standing by adopting holographic 24 passages to the faint magnetic signal of bank note nominal value, and high density is seamless, panorama type scanning, sampling.Handle by amplifying signal again, form signal encoding.The magnetic that so just can clearly tell whole nominal value distributes and gray scale, and standard picks out the true and false function of bank note.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2-1 is Facad structure figure of the present utility model;

Fig. 2-2 is a construction profile of the present utility model.

Embodiment

Shown in Fig. 2-1, Fig. 2-2, the utility model comprises 24 passage panoramic seamless crack magnetic stripe 1 and signal conditioning circuit plate 2 two parts, in the 24 passage magnetic stripe metal shells, with 24 InSb mistor chips, so that " product " arrange (realizing seamless) and lie in above the permanent magnet, and pin constitutes in the connection by font.When whole of bank note passes through the magnetic stripe case surface, the atomic weak signal of the corresponding generation of each passage in 24 passages, by amplifying on the signal regulating panel, filtering and digital processing form the output of corresponding magnetic coding.And seamless connection the between passage and the passage, 24 passage magnetic coding is converged together, form entire paper coin panorama type, the false proof distribution plan of seamless, highdensity magnetic.And then identify the true and false of coin, and avoided as classic method, only simply distinguishing having or not of fixed area magnetic, and the erroneous judgement that occurs.

Having 24 passages in Fig. 1 forms, each passage is to be connected to the end of oppisite phase of input resistance R1 to amplifier IC1 by InSb mistor MR1 and the MR2 mode by capacitor C 1 AC coupling, R2, R3 series connection is connected on power supply and ground respectively, the centre links to each other with the in-phase end of IC1, R4 is the feedback resistance of IC1, C3 is a filter capacitor, the IC1 output terminal is connected to second level input resistance R5 by the mode of C2 AC coupling again, R5 is connected to IC2, resistance R 6, potentiometer R, thermistor Rt constitute the backfeed loop of IC2, are connected to end of oppisite phase and the output terminal of IC2.The IC2 output terminal be connected to 8 tunnels analogy switches wherein on the input port (analog switch has 8 input ports) can connect 8 passage InSb mistors and amplify the signal that produces by IC1, IC2 two-stage; One has three 8 tunnels analogy K switch 3, K4, K5 has 24 passages, can connect the signal of the InSb mistor generation of 24 corresponding passages; It is to select analog switch by code translator IC6 that the output of each passage is selected, and selects concrete passage output by analog switch K3, K4, K5 again.The output of three analog switch K3, K4, K5 is connected to the in-phase end of IC7 by resistance R 7, R8, R9 and R10, and the IC7 end of oppisite phase links to each other with output terminal to form and follows, and is connected to output terminal at last.The selection of concrete resistance capacitance is disposed according to the actual needs.

Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection domain of the present utility model should be defined with the application's claim protection domain is as the criterion.

Claims

1, a kind of novel magnetic identification sensor is characterized in that: comprise 24 passage panoramic seamless crack magnetic stripes (1) and signal conditioning circuit plate (2) two parts; In the 24 passage magnetic stripe metal shells,, lie in above the permanent magnet pin in the connection with seamless form arrangement with " product " font with 24 InSb mistor chips.

2, the magnetic identification sensor that kind according to claim 1 is novel, it is characterized in that: each passage of described 24 passages is to be connected to the end of oppisite phase of input resistance R1 to amplifier IC1 by InSb mistor MR1 and the MR2 mode by capacitor C 1 AC coupling, R2, the R3 series connection is connected on power supply and ground respectively, the centre links to each other with the in-phase end of IC1, R4 is the feedback resistance of IC1, C3 is a filter capacitor, the IC1 output terminal is connected to second level input resistance R5 by the mode of C2 AC coupling again, R5 is connected to IC2, resistance R 6, potentiometer R, thermistor Rt constitutes the backfeed loop of IC2, be connected to end of oppisite phase and the output terminal of IC2, the IC2 output terminal is connected to 8 tunnels analogy switches and wherein can connects 8 passage InSb mistors on the input port and pass through IC1, the IC2 two-stage is amplified the signal that produces; One has three 8 tunnels analogy K switch 3, K4, K5 has 24 passages, can connect the signal of the InSb mistor generation of 24 corresponding passages; It is to select analog switch by code translator IC6 that the output of each passage is selected, and selects concrete passage output by analog switch K3, K4, K5 again.The output of three analog switch K3, K4, K5 is connected to the in-phase end of IC7 by resistance R 7, R8, R9 and R10, and the IC7 end of oppisite phase links to each other with output terminal to form and follows, and is connected to output terminal at last.