CN2190326Y - Miniature two purpose currency identifier - Google Patents
Miniature two purpose currency identifier Download PDFInfo
- Publication number
- CN2190326Y CN2190326Y CN 93229879 CN93229879U CN2190326Y CN 2190326 Y CN2190326 Y CN 2190326Y CN 93229879 CN93229879 CN 93229879 CN 93229879 U CN93229879 U CN 93229879U CN 2190326 Y CN2190326 Y CN 2190326Y
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- CN
- China
- Prior art keywords
- signal
- amplifier
- operational amplifier
- magnetic
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a miniature dual-purpose currency identifier, which can detect magnetic printed dots and fluorescent writing traces on the currency. In the utility model, two batteries are adopted to supply the power to the ultraviolet lamp tube through high frequency oscillating voltage increase. A magnetic detecting circuit is amplified by a two-stage operational amplifier, and then drives acoustic-optic signals through an aerotron. In the technology. A magnetic head is adopted to be directly input to an input terminal of a first stage operational amplifier, and a negative ultra offset working state is adopted in a second operational amplifier. Positive feedback signals hold a circuit. The circuit has the advantages of small size, simpleness, low cost, and strong anti-interference ability, and can detect all the true and false currency.
Description
The utility model relates to currency truth identification device.It is a kind of miniature difunctional counterfeit money recognizer that detects magnetic printing point and the old writing of fluorescence.
The difunctional counterfeit money recognizer of seeing in the market, magnetic test section: by the magnetic head input signal, amplify and the transistor promotion luminotron signal that flashes through 4 grades of operational amplifiers, the magnetic test section: by transistor, step-up transformer, form oscillating circuit, DC boosting becomes ac high-voltage and powers to quartz burner.
This counterfeit money recognizer volume is big, complex circuit designs, and undesired signal is many, the signal that makes the mistake easily, when measuring magnetic signal, signal lamp flashes across has signal also to can't see sometimes, can not preserve signal.
Provide a kind ofly, volume is little order of the present utility model, and circuit design is simple, advanced, cost is low, and antijamming capability is strong, can keep detected magnetic signal, has that magnetic detects and the difunctional counterfeit money recognizer of UV detection.
Be achieved in that 1 order of the present utility model, external form and structure: split housing by what ABS plastic was made for one, one is equipped with magnetic head, the side is opened and flatly UV-lamp is housed and can sends ultraviolet, signal lamp and two miniature push switch are housed above, external form also can be made into other sample, two batteries, electronic original part, quartz burner are equipped with in inside.2, UV detection part: this part is the oscillating circuit that is connected into by triode, electric capacity, resistance, a transformer, and circuit is supplied with the 3V direct current by push switch, powers to quartz burner by oscillator, transformer.3, magnetic test section: this part mainly is made up of a dual operational amplifier and a triode.Magnetic printing point on the coin face is by the magnetic head relative motion, on magnetic head, produced electric signal, the positive input terminal that magnetic head (F) by resistance (R3) power supply directly inserts first order operational amplifier (IC11/2A) amplifies, can reduce entering of undesired signal like this, (first order operational amplifier is made up of feedback resistance and bias resistance).Deliver to the negative input end of second level operational amplifier through amplifying signal by electric capacity, on second level operational amplifier (IC11/2B),, make amplifier be in the super offset operation state of negative sense by the configuration of resistance R 5 much larger than R6.Be output as 0V during the no signal input, the amplifier degree of depth is ended, and realizes that by diode (D) positive feedback bistable state keeps function when the signal input is arranged.Small-signal or undesired signal push away motionless amplifier like this, do not have output voltage, make undesired signal cut in a large number, improve antijamming capability.Because diode and resistance have been connected into positive-feedback circuit, when enough big signal is imported, when second level operational amplifier output voltage surpasses diode forward conduction voltage, just can produce positive feedback effect, output HIGH voltage maintains signal, realizes bi-stable function.The voltage signal that maintains promotes triode by resistance, and generation is moved pronunciation circuit, piezoelectric patches and luminotron output sound and light signal.Decontroling push switch prepares to detect for the second time.
Owing to adopt the appeal scheme, accomplished that volume is little, cost is low, and circuit design advanced person, reasonable, simple has improved antijamming capability, and pulse signals has realized the maintenance Presentation Function.UV detection and magnetic detection, two kinds of functions are integrated, and have realized difunctional.
Describe below in conjunction with accompanying drawing.
Fig. 1 is external form and structural drawing.
Among the figure: 1, quartz burner 2, magnetic head 3, light emitting diode 4, two knobs 5, enclosure are equipped with two batteries and electronic original part.
Fig. 2 is a circuit diagram.
E is two batteries among the figure.K1-K2 is two fine motion push switch, IC1 double operational integrated circuit block, IC2 sound circuit, Y piezoelectric patches, BG1, BG2 triode, LED light emitting diode, F magnetic head, B transformer, ED micro type ultra-violet fluorescent tube, R1-R8 resistance, C1-C2 electric capacity, D diode.
The magnetic test section is by push switch (K2) power supply in Fig. 2.The magnetic printing point position of magnetic head (F) and coin face does relative motion, record the induced signal on the magnetic point, after becoming electric signal, magnetic head (F) directly sends into the in-phase input end of first order operational amplifier (IC11/2A), can reduce entering of undesired signal like this, R3, R4, be biasing resistor, R1, R2 form negative-feedback circuit, and the signal after the amplification is delivered to the reverse input end of second level operational amplifier (C11/2B) by capacitor (C1).At second level operational amplifier, make operational amplifier (IC11/2B) be in the super offset operation state of negative sense by resistance R 5 much larger than the configuration of R6, again by the non-linear negative-feedback circuit of diode (D) resistance (R4).When not having the signal input, amplifier (IC11/2B) and defeated OV are in degree of depth cut-off state.When enough big signal is imported, the signal voltage of amplifier (IC11/2B) output just produces positive feedback effect greatly when making diode (D) conducting, output signal is kept, realized bi-stable function, the voltage signal of output is delivered to triode (LED) through resistance (R7) and is sent light signal, and sound circuit (IC2) is by compressing tablet (Y) signal of sounding.Decontroling push switch prepares to detect for the second time.In Fig. 2 middle-ultraviolet lamp test section is to power by switch (K1).Through triode (BG2), resistance (R8), electric capacity (C2), transformer (B), the oscillating circuit formed, the 3V DC voltage is become high-frequency alternating current, luminous through transformer (B) the moving ultraviolet tube of offspring that boosts, detect fluorescent writing.
Claims (3)
- A kind of miniature difunctional counterfeit money recognizer, form by UV detection part and magnetic test section, the oscillator that UV detection partly is made up of a triode (BG1), boost through transformer and to power to quartz burner, magnetic test section: by magnetic head (F) input signal, amplify through two-stage calculation amplifier (IC1), by positive feedback diode (D) holding signal, signal voltage passes through resistance (R7) again and makes triode (BG1) conducting, make pronunciation circuit (IC2), luminotron (LED) conducting, send sound and light signal, it is characterized in that:1, adopts a two-stage calculation amplifier (IC1) and the magnetic sensor circuit that triode is formed;
- 2, the magnetic head (F) through resistance (R3) power supply directly inserts first order operational amplifier (IC11/2A) input end;
- 3, on second level operational amplifier (IC11/2B), by the configuration of resistance R 5 much larger than R6, make amplifier be in the super offset operation state of negative sense, amplifier (IC11/2B) is output as 0V during the no signal input, the amplifier degree of depth is ended, and realizes that by diode (D) positive feedback bistable state keeps function when the signal input is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93229879 CN2190326Y (en) | 1993-12-09 | 1993-12-09 | Miniature two purpose currency identifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93229879 CN2190326Y (en) | 1993-12-09 | 1993-12-09 | Miniature two purpose currency identifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2190326Y true CN2190326Y (en) | 1995-02-22 |
Family
ID=33806658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93229879 Expired - Fee Related CN2190326Y (en) | 1993-12-09 | 1993-12-09 | Miniature two purpose currency identifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2190326Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971635B (en) * | 2005-11-25 | 2011-06-29 | 深圳市德泽能源科技有限公司 | A numeral voice money detection pen |
-
1993
- 1993-12-09 CN CN 93229879 patent/CN2190326Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971635B (en) * | 2005-11-25 | 2011-06-29 | 深圳市德泽能源科技有限公司 | A numeral voice money detection pen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |