CN2240743Y - Tester for identifying true and false coin - Google Patents
Tester for identifying true and false coin Download PDFInfo
- Publication number
- CN2240743Y CN2240743Y CN95219892U CN95219892U CN2240743Y CN 2240743 Y CN2240743 Y CN 2240743Y CN 95219892 U CN95219892 U CN 95219892U CN 95219892 U CN95219892 U CN 95219892U CN 2240743 Y CN2240743 Y CN 2240743Y
- Authority
- CN
- China
- Prior art keywords
- sensor
- connects
- output terminal
- pick
- false coin
- 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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- Testing Of Coins (AREA)
Abstract
The utility model discloses a tester for identifying true and false coins, which adopts a test coil as a sensor. A phase-sensitive detector is adopted to carry out simultaneous regulation to signals which are detected and amplified, and then, the signals are transmitted to a microprocessor to conduct recognition processing. The results are finally transmitted to an audible and visual alarm or an automatic sorting mechanism. The utility model adopts microcomputer control and signal recognition processing, and has advantages of simple structure of a circuit, high automatization and good recognition effect.
Description
Along with the development of society, the multiple employing coin machine of payment has automatically appearred in the people life, as automatic vending machine, game machine, coin telephone, self-service ticketing bus etc., but do not have a kind of simple and practically at present as yet, can discern the device of true and false coin automatically.
The purpose of this utility model provides a kind of simple and practical, can differentiate the pick-up unit of true and false coin automatically.
The purpose of this utility model is achieved in that utilizes metal Eddy Current Nondestructive Testing principle, designs a kind of pick-up unit of being made up of waveform generator, sensor, prime amplifier, sound detector, signal processor etc.; Waveform generator connects sensor, and the sensor output terminal connects prime amplifier, and the output terminal of amplifier connects sound detector, and the sound detector output terminal connects signal processor.Waveform generator sends sets up the required excitation waveform in vortex field, send into sensor, sensor is searched relevant coin eddy current signal and is entered prime amplifier and amplified, send into sound detector and carry out synchronous demodulation, X, Y-signal after the demodulation that obtains are sent into signal processor and carried out analyzing and processing (this signal can form the vector locus on the eddy current impedance plane diagram), write the relevant data of true coin in the signal processor in advance, so that comparative analysis.
Sensor described in the utility model can be to compose in parallel by emission/receiving sensor with to level sensor, and its defeated bringing out respectively connects a prime amplifier, and emission/receiving sensor is two magnetic test coils, is a magnetic test coil to level sensor.
Sound detector described in the utility model is a phase-sensitive detector (PSD), can connect two amplifiers by switching motherboard and form.
Waveform generator described in the utility model, signal processor can be same microprocessor MPU, and the output terminal of microprocessor connects the control end of an audible-visual annunciator or automatic fraction collector structure.。
A kind of pick-up unit of true and false coin of differentiating of the utility model adopts magnetic test coil as sensor, select for use the signal after phase-sensitive detector (PSD) will be searched, amplify to reconcile synchronously, send into microprocessor and advance the identification processing, its result sends into audible-visual annunciator or automatic fraction collector structure.The utility model loop structure is simple, adopts the identification of system controlled by computer and signal to handle, the automaticity height, and recognition effect is good.
The utility model is described in further detail to reach embodiment in conjunction with the accompanying drawings;
Accompanying drawing 1, the utility model functional-block diagram;
Accompanying drawing 2, the utility model embodiment circuit diagram;
As accompanying drawing 1, shown in the accompanying drawing 2, the utility model microprocessor MPU is as waveform generator, connect an amplifier U1, the output terminal of amplifier U1 emission in parallel emission/receiving sensor L1, L1 ' and to level sensor L2, receive sensing coil L1 ' and respectively be connected an amplifier U2-2 to level sensor L2, U2-1, amplifier U2-2, the output terminal of U2-1 inserts switching motherboard U3 respectively, the output terminal of switching motherboard U3 is connected to two-way amplifier U2-3 and U2-4, the output of amplifier U2-3 and U2-4 inserts the A/D converter of microprocessor MPU, output termination one audible-visual annunciator of microprocessor MPU.
During use, microprocessor MPU sends out the excitation waveform signal that different frequency is sent in the device timesharing as waveform, signal amplifies through amplifier U1, send into the emission sensing coil L1 of emission/receiving sensor and arrive level sensor L2, reception sensing coil L1 ' sends into amplifier U2-2 respectively with the relevant coin eddy current signal of searching to level sensor L2 and U2-1 is amplified, the phase-sensitive detector (PSD) that amplifying signal enters switching motherboard U3 and two-way amplifier U2-3 and U2-4 composition decomposes detection, and its control signal is sent from MPU; X after the conciliation, y component are sent into A/D converter, microprocessor MPU carries out analyzing and processing (the sorting territory, the ellipse garden of current vortex impedance plane of adopting the probability statistical analysis method to set true coin writes microprocessor in advance) to input signal, and analysis result is sent into audible-visual annunciator.
The utility model can be selected different control processing system according to the purposes difference, its sensor-based system also can be between waveform generator and sound detector several groups of sensors in parallel of design, carry out the detection of coin simultaneously.
Claims (4)
1, a kind of pick-up unit of differentiating true and false coin, comprise elements such as sensor, prime amplifier, signal processor, it is characterized in that: also comprise waveform generator, sound detector, waveform generator connects sensor, the sensor output terminal connects prime amplifier, the output terminal of amplifier connects sound detector, and the sound detector output terminal connects signal processor.
2, according to the described a kind of pick-up unit of differentiating true and false coin of claim 1, it is characterized in that: sensor can be to compose in parallel by emission/receiving sensor with to the level sensor two-way, its defeated bringing out respectively connects a prime amplifier, emission/receiving sensor is two magnetic test coils, is a magnetic test coil to level sensor.
3, according to the described a kind of pick-up unit of differentiating true and false coin of claim 1, it is characterized in that: described sound detector is a phase-sensitive detector (PSD), can connect two groups of amplifiers by switching motherboard and form.
4, according to the described a kind of pick-up unit of differentiating true and false coin of claim 1, it is characterized in that: described waveform generator, signal processor can be same microprocessor, and the output terminal of microprocessor connects the control end of an audible-visual annunciator or automatic fraction collector structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95219892U CN2240743Y (en) | 1995-08-18 | 1995-08-18 | Tester for identifying true and false coin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95219892U CN2240743Y (en) | 1995-08-18 | 1995-08-18 | Tester for identifying true and false coin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2240743Y true CN2240743Y (en) | 1996-11-20 |
Family
ID=33867940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95219892U Expired - Fee Related CN2240743Y (en) | 1995-08-18 | 1995-08-18 | Tester for identifying true and false coin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2240743Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104205176A (en) * | 2012-03-14 | 2014-12-10 | 梅伊有限公司 | Coin sensor |
| CN104700490A (en) * | 2013-12-10 | 2015-06-10 | 北京华夏聚龙自动化股份公司 | Multi-model coin signal collecting device based on eddy current sensor |
| CN105023348A (en) * | 2014-04-25 | 2015-11-04 | 北京华夏聚龙自动化股份公司 | Multi-mode eddy current sensor excitation and detection circuit |
| CN105765632A (en) * | 2013-09-11 | 2016-07-13 | 布劳产品开发有限公司 | Device for use in detecting counterfeit or altered bullion, coins or metal |
-
1995
- 1995-08-18 CN CN95219892U patent/CN2240743Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104205176A (en) * | 2012-03-14 | 2014-12-10 | 梅伊有限公司 | Coin sensor |
| CN105765632A (en) * | 2013-09-11 | 2016-07-13 | 布劳产品开发有限公司 | Device for use in detecting counterfeit or altered bullion, coins or metal |
| CN104700490A (en) * | 2013-12-10 | 2015-06-10 | 北京华夏聚龙自动化股份公司 | Multi-model coin signal collecting device based on eddy current sensor |
| CN105023348A (en) * | 2014-04-25 | 2015-11-04 | 北京华夏聚龙自动化股份公司 | Multi-mode eddy current sensor excitation and detection circuit |
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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 |