CN2218949Y - AC table full function tester for identifying fake banknote - Google Patents

Abstract

The utility model relates to an AC table type full-functional tester for identifying fake banknotes, which is a tester for identifying foreign currency, RMB, money orders and value-added tax bills. The AC table type full-functional tester for identifying fake banknotes can be used for detecting currency paper, fluorescent writing, watermark images, safety lines and magnetic printed dots. The utility model adopts a bridge type doubling circuit to supply power to a lamp tube. A magnetic signal detection part adopts a two-stage operational amplifier, and sends out an acoustic-optic signal through the pushing of an NE555 time-base circuit. The circuit has the characteristics of advanced, unique and simple design, low cost, reliability, good stability, strong anti-interference ability, etc.

Description

Exchange desk-top global function counterfeit money recognizer

The utility model relates to the recognition device of the currency true and false.It is a kind of counterfeit money recognizer that detects coin paper, fluorescent writing, safety line, watermarking images, magnetic printing point.

The desk-top counterfeit money recognizer of seeing in the market, tube power adopts inductance type ballast.Magnetic detection partly adopts the level Four operational amplifier to amplify after triode promotes the luminotron signal that flashes.This counterfeit money recognizer, the low fluorescent tube of supply voltage can not start, and start-up time is long.Magnetic test section circuit complexity, anti-interference is poor, the signal that easily makes the mistake, when measuring magnetic signal, the light of luminotron flashes across, and can't see signal sometimes, can not keep signal certain hour for identification.

The purpose of this utility model provides a kind of: 1, fluorescent tube part: voltage is low also can be started, and starts fast lamp tube power supply circuit.2, magnetic test section: adopt two-stage to amplify, increase anti-jamming circuit, improve antijamming capability, increase regularly holding circuit of one stage signal.3, circuit design advanced person, simple, global function counterfeit money recognizer that cost is low.

The purpose of this utility model is achieved in that 1, external form and structure: by a plastic casing, be equipped with above to detect and use magnetic head, be used for detecting the magnetic printing point on the coin face, the front is opened an oblong aperture currency and is placed in the hole, quartz burner is equipped with on top, hole, be used for detecting coin paper, fluorescent writing, fluorescent tube is equipped with in light-passing board bottom, bottom, be used for detecting watermark head portrait and safety line, power switch, functional switch, magnetic signal lamp, power lights, inside be housed on frontal plane electronic component is housed.External form also can be made into other style.2, ultraviolet ray and fluorescent light test section: believe voltage rectifier with bridge-type, voltage is low so also can start fluorescent tube, and toggle speed is fast, and the DC voltage after boosting is powered to UV-lamp and fluorescent light respectively by resistance and functional switch.Ultraviolet ray irradiation coin paper is used for detecting the reflectance of coin paper and the writing of fluorescent ink printing.Fluorescent light perspective coin paper is used for detecting watermark head portrait and safety line.Also available battery is through the high frequency power supply of boosting.3, magnetic test section: this part adopts two-stage calculation amplifier and an amplifying circuit and the timing signal display circuit that time base circuit is formed.Magnetic head is housed on casing, when the magnetic head move left and right is aimed at the position that is printed on magnetic ink on the currency, on magnetic head, induces electric signal, resistance (R ₁) to the magnetic head power supply, magnetic head directly inserts the in-phase input end of operational amplifier, amplifying signal is through capacitor (C ₂) be input to the in-phase input end of second level operational amplifier, second level operational amplifier negativing ending grounding, anode is by 100K resistance (R ₄) ground connection, make amplifier outer in the super offset operation state of forward, amplifier output is full when not having the signal input closes, small-signal and undesired signal input, output does not have only magnetic signal that output is arranged, and makes undesired signal by mass excision.The signal of second level operational amplifier output is again through diode (D ₅), send into the timing holding circuit of forming by NE555, keep the signal of certain hour to promote light emitting diode (D by 3 jiaos of outputs ₉) and pronunciation sheet (IC ₃), piezoelectric patches (E) sends sound and light signal.Power unit: alternating current is pressed rectifier and power transformer power supply by self-lock switch, functional switch to letter, and transformer output 12V voltage becomes the 9V DC voltage through bridge or rectification by regulator block 7809 and powers to the magnetic test section.As can directly inserting magnetic substance with 9V with powered battery, the oscillator that the fluorescent tube part is formed by triode and the transformer supply fluorescent tube that boosts.

Adopt the appeal scheme can realize the circuit design advanced person, simple, rationally, cost is low, antijamming capability is strong, signal timing keeps showing, little magnetic signal also can be detected show.Function is complete, can differentiate the true and false of Renminbi, foreign currency, draft, VAT invoice.

Describe below in conjunction with accompanying drawing.

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the magnetic sensor circuit schematic diagram.

Fig. 3 is power supply, quartz burner, fluorescent tube power supply circuit.

Fig. 4 is direct current supply figure.

Among Fig. 11, quartz burner; 2, fluorescent tube; 3, magnetic head; 4, power switch; 5, functional switch; 6, magnetic signal pilot lamp; 7, power light; 8, casing; 9, base.

Fig. 2,3,4, middle R ₁-R ₁₁Resistance, C ₁-C ₁₀Capacitor, D ₁-D ₂Diode, D ₈, D ₉Light emitting diode, W ₁, W ₂Adjustable resistance, IC ₁Dual operational amplifier, IC ₂, NE555 time base circuit, IC ₃, pronunciation circuit, IC ₄, regulator block, G piezoelectricity pronunciation sheet, F magnetic head, AL, self-locking button switch, 1K, functional switch, K switch, B ₁B ₂Transformer, E electric battery, BG triode, YD fluorescent tube, ZD quartz burner.

Fig. 2 is a magnetic sensor circuit, and power supply is by the transformer (B among Fig. 3 ₁) by 2 of a, b to bridge rectifier circuit (D ₁-D ₄) power supply, voltage after the rectification is through capacitor (C7) filtering, through three-terminal regulator block 7809 output 9V DC voltage, C6 absorbs electric capacity, magnetic signal is to aim at magnetic head (F) by the magnetic ink printing point on the coin paper to relatively move, magnetic head sense head goes out electric signal, magnetic head is powered through resistance (R1), make magnetic head for being magnetic, electric capacity (C1) is to be used for eliminating little pulse interference signal, magnetic signal is admitted to first order computing amplified in-phase input end, and R2 is a biasing resistor, carries out the first order by the configuration of resistance (R3) and adjustable resistance (W1) and amplifies.Signal is sent into the in-phase input end of second level operational amplifier through electric capacity (C2), the direct ground connection of inverting input, in-phase input end is by 100K resistance (R4) ground connection, make amplifier when not having input signal, be operated in the full state that closes of the super biasing degree of depth, output 8V, the latter half of signal is cut like this, and small-signal and undesired signal be output not, has only enough big signal just can be amplified to output.IC2 is with a NE555 time base circuit, by resistance (R7) electric capacity (C4, (C5) timer of Zu Chenging, timer input angle (2) is by resistance (R6) power supply, during no signal 9V, 3 jiaos are output as 0V, electric capacity (C3), resistance (R5), diode (D5) is formed unidirectional integrating circuit, because magnetic signal is made up of a plurality of pulses, and big undesired signal all is a monopulse, in order to improve antijamming capability, utilizes integrating circuit, the undesired signal of monopulse can not promote NE555 work, improve antijamming capability, when magnetic signal, NE555 timer work when dropping to 1/3 supply voltage by the voltage on the integrating circuit electric capacity (C3), 3 jiaos just have output voltage, by resistance (R8), light emitting diode (D9) sends light signal.Send by resistance (R9), musical film (IC3), piezoelectric patches (G) and to sting eastern acoustical signal, signal stops through certain hour, prepares next time and detects.

Fig. 3 is quartz burner and fluorescent tube circuit, power supply is pressed rectifier diodes (D6, D7) capacitor (D8, D9) power supply by self-locking push switch (AL), functional switch (1K) to the bridge-type letter, through current-limiting resistance (R11), functional switch (1K) is respectively to fluorescent tube (YD), quartz burner (ED) power supply.

Fig. 4 is DC power-supply circuit figure, be used to make battery-powered type, or dual-purpose type, triode in the circuit (BG), adjustable resistance (W2), electric capacity (C10) and transformer (B2) are formed oscillator, (K) oscillator work that closes a switch, between C, D exportable voltage of intermediate frequency by switch to lamp tube power supply.

Claims (4)

1, the desk-top global function counterfeit money of a kind of interchange recognizer, be by casing, magnetic detects partly, fluoroscopy detects partly, the ultraviolet ray irradiating and detecting is partly formed, fluorescent light and UV-lamp tube portion are formed by start-up circuit to lamp tube power supply, bump the test section, induce signal by the magnetic signal magnetic head on the coin paper, through multistage amplification, promote output stage and send sound and light signal, it is characterized in that: fluorescence and UV detection have partly adopted the bridge voltage-double rectification power supply, reduced trigger voltage, accelerated toggle speed, the magnetic test section, adopted regularly display circuit of the two poles of the earth operational amplifier and one stage signal, magnetic head directly inserts first order operational amplifier, in the operational amplifier of the second level, adopted the super offset operation state of forward to make amplifier output,, output timing signal has been shown with the timing display circuit that NE555 forms at the super full state that closes.

2, counterfeit money recognizer according to claim 1, it is characterized in that: magnetic head is through resistance (R ₁) power supply, directly insert first order operational amplifier input end.

3, counterfeit money recognizer according to claim 1 is characterized in that: the direct ground connection of second level operational amplifier inverting input, and in-phase input end resistance (R ₄) ground connection, the super biasing of amplifier makes amplifier output at the super full state that closes, and does the timed acousto-optic demonstration with negative signal promotion NE555.

4, require described counterfeit money recognizer according to right 1, it is characterized in that: power to fluorescent light and quartz burner with bridge voltage-double rectification circuit.

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