CN100587732C - Coin distinguishing apparatus and its method for distinguishing - Google Patents
Coin distinguishing apparatus and its method for distinguishing Download PDFInfo
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- CN100587732C CN100587732C CN200510095334A CN200510095334A CN100587732C CN 100587732 C CN100587732 C CN 100587732C CN 200510095334 A CN200510095334 A CN 200510095334A CN 200510095334 A CN200510095334 A CN 200510095334A CN 100587732 C CN100587732 C CN 100587732C
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Abstract
The invention relates to a coin identifying or discriminating device and method, especially relating to the discrimination of the true coins from the false coins. The method vertically slides the tested coin along a guiding groove down onto a substrate, collects a sound signal emitted by the coin as striking the substrate through sound sensor, directly sends the sound signal or sends the sound signal amplified by a power amplifier to a frequency spectrum analyzing device for making frequency spectrum analysis so as to obtain an inherent frequency of the tested coin, and compares the inherent frequency with a standard data in a frequency spectrum standard memory for making frequency spectrum discrimination; then uses a pressure sensor to measure the weight of the tested coin and sends the generated force signal amplified by a power amplifier into a weight analyzing device and calculates to obtain the weight of the tested coin and compares it with a standard data in a weight standard memory for making weight discrimination; then by an operational policy maker, synthetically analyzes and obtains the final discrimination result. The discriminating device has simple structure, lower manufacturing cost, and high identifying accuracy, applied to identification of various coins and having a wide application prospect.
Description
Technical field:
The present invention relates to evaluation or the recognition device and the method for coin, relate in particular to identification device and method, also relate to the application of spectrum analysis technique coin.
Background technology:
Along with the continuous prosperity of market economy, automatic vending machine has obtained being extensive use of, and makes that the circulation of coin is increasing.Meanwhile, a large amount of smashs also occurs, influenced operator's legitimate interests.Therefore it is very necessary developing Coin-discriminating device simple in structure, the high and low cost of resolution.
In the prior art, the authentication equipment of coin mainly is by measuring the different physical characteristics of coin, realizing denomination, coin type and the true and false discriminating of coin.For example, utilize optical means to detect the pattern of coin; Or utilize Magnetic Sensor to detect the magnetic characteristic of coin; Or utilize electric transducer to detect electrical characteristics of coin or the like.Utilize Magnetic Sensor and optical sensor to detect the material property and the picture on surface of coin respectively in the CN95106303.0 patent of invention, thereby realize the discriminating of uniting of two kinds of methods.The patent of invention of CN 02806988.9 utilizes the capacitive coupling between coin and the sensor device to determine the thickness of coin, belongs to the measurement of electrical characteristics.These authentication equipments all use electromagnetic sensor and optical sensor, and their structure all more complicated, its price is also just relatively expensive.
Identifying its true and false according to the sound that the excitation silver dollar produces, is traditional discrimination method, and this is that many coin researchers and collector are known.But this discriminating behavior all is artificial at present, and it and discriminating person's experience has much relations, if lack experience then False Rate is higher.So far still find no the equipment that utilizes sound to identify the coin true and false.
Summary of the invention:
At deficiency of the prior art, the object of the present invention is to provide a kind of Coin-discriminating device and discrimination method, it carries out spectrum analysis by the sound of gathering coin to it, and in conjunction with weight detecting, realizes the coin discriminating.
The object of the invention has following mode to realize.
Coin-discriminating device of the present invention, comprise the casing that has slot and be arranged on the interior control system of control enclosure, it is characterized in that, on the internal face of described casing sound absorption coating is arranged, internal orifice edge at slot is provided with gathering sill, the foundation plate that sound transducer is installed is set below this gathering sill, the upper surface of this plate and surface level have 10 °-45 ° pitch angle, it is connected on the base plate of casing, and the air line distance of edge, gathering sill lower end and foundation plate upper surface is in the 10-50 cm range; Inferoanterior at the low side of foundation plate is provided with a leveling board, be fixed with a supporting revolving shaft that can drive the positive and negative rotation of this plate at this plate lower surface, this rotating shaft one end by bearing fixing in the areole of casing, and stretch out that casing is outer to link to each other with motor, the other end by bearing fixing on the thrust of casing inner bottom surface; Also be fixed with a dividing plate on the casing inner bottom surface below rotating shaft, the separated by spaces that this dividing plate encloses foundation plate and cabinet wall bread is to leave with two storage cases true, counterfeit money, and is respectively equipped with the outlet with the true and false coin of exterior; Described sound transducer is by the control system conducting in lead and the control enclosure; Described control enclosure be arranged in the cabinets cavity or casing outward nearby.Also can on described leveling board, fix two or more pressure transducers, and increase again on the pressure transducer one be used to weigh on leveling board (weighing plate), and make this plate upper surface be lower than the foundation plate upper surface, described pressure transducer is also by the control system conducting in lead and the control enclosure.
Control system of the present invention comprises signal pre-processing system, data analysis and decision system, the after-treatment system that uses in the prior art, and wherein, signal pre-processing system comprises sound transducer, the corresponding power amplifier of pressure transducer.Data analysis and decision system comprise arrangements for analyzing frequency, gravimetric analysis device, spectrum standard memory, weight standard memory and computing decision-making device.After-treatment system comprises true and false coin tripping device and display device and the corresponding driving circuit in the Coin-discriminating device.
Discrimination method of the present invention, it is characterized in that, it differentiates that step is: (1) vertically is slipped to foundation plate on from slot along gathering sill tested coin, sound transducer is gathered the voice signal that sends when tested coin clashes into foundation plate, directly or through delivering to arrangements for analyzing frequency after the power amplifier amplification carry out spectrum analysis, analysis obtains the natural frequency of tested coin, and relatively carries out frequency spectrum and differentiate with normal data in the spectrum standard memory; (2) tested coin tumbles on the last leveling board from foundation plate again, pressure transducer is subjected to the pressure effect that tested coin weight is produced, producing force signal amplifies the back and is input to the gravimetric analysis device through power amplifier, calculate the weight of tested coin, and with the weight standard memory in normal data relatively carry out weight and differentiate; (3) the identification result signal that frequency spectrum is differentiated and weight is differentiated is input to the computing decision-making device and carries out analysis-by-synthesis, the computing decision-making device sends control signals to motor according to analysis result separates true and false coin, and stores respectively in the different storage cases; (4) according to the genuine note denomination that identifies, control signal is input to display device, shows the amount of money of genuine note.
For the Coin-discriminating device of pressure boost sensor not, in discrimination process, omit step (2), described step (3) is: the measurement result that frequency spectrum is differentiated is input to the computing decision-making device and analyzes and obtain identification result, the computing decision-making device sends control signals to motor according to identification result separates true and false coin, and stores in the storage case.
In actual use, need at first set up normal data in normal data in the spectrum standard memory and the weight standard memory usually.Because coin is a non-individual body, the spectrum curve of its vibratory response has infinite a plurality of natural frequency in theory, that is to say infinite a plurality of peak, usually several peaks before only considering, the natural frequency of preceding several peaks correspondence and frequency interval as the spectrum standard data, by a large amount of genuine note experiments, set up the spectrum standard database.And, utilize balance that genuine note is carried out the measurement of weight, set up the weight standard database.Can deposit the normal data of the coin of multiple different Currency Type, different denominations simultaneously in spectrum standard memory and the weight standard memory, thereby satisfy the needs of different occasions.
The present invention is by the sound of collection coin free-falling bump foundation plate, and it is carried out the natural frequency that spectrum analysis accurately obtains coin, thereby and in conjunction with the discriminating of weight detecting realization coin.Compare with existing Coin-discriminating device, have following remarkable advantage:
1. because the frequency spectrum of coin has comprised information such as the material, density, size of coin simultaneously, thereby adopt the discriminating of uniting of frequency spectrum and weight, differentiate the accuracy rate height;
2. because sonic transducer and pressure transducer use extensively, cheap, and do not require the expenditure of energy, so the identification device cost is low; Simultaneously, discrimination process can not cause damage to coin;
3. the data collection and analysis disposal system all adopts the electronics integrated device, and the integrated level height calculates fast, and the result is accurate;
4. the sound of this identification device collection coin free-falling bump foundation plate carries out spectrum analysis, and is very similar with the automatic vending machine and the slot machine used in bus of reality, easy simple to operate
5. simple in structure, the while is owing to the technology maturation of sonic transducer and pressure transducer, so the system reliability height.
Coin-discriminating device of the present invention and discrimination method thereof, realized harmless, in real time, fast, identify accurately and reliably, operating process is simple, manufacturing cost is lower, widely applicable, be not only applicable to the discriminating of common coin circulation, also can be used for all kinds of silver dollars, copper coin, and the discriminating of commemorative coin, gold and silver coin etc., be with a wide range of applications.
Be further described below by embodiment and accompanying drawing thereof.
Description of drawings
Accompanying drawing 1 is the schematic perspective view of a kind of embodiment of Coin-discriminating device of the present invention.
Accompanying drawing 2 is the structural representation of a kind of embodiment of Coin-discriminating device of the present invention.
Accompanying drawing 3 is the right view of above-mentioned accompanying drawing 2.
Accompanying drawing 4 is the system chart of Coin-discriminating device of the present invention.
Accompanying drawing 5 is the circuit diagram of control system of the present invention.
Embodiment:
Coin-discriminating device as shown in Figure 1, slot 1 are located on the sidewall of casing 3 (in actual use, also can as required slot be located on the casing roof), are provided with the gathering sill 2 at band angle of inclination in the internal orifice edge of slot.For the sound that guarantees coin free-falling bump foundation plate enough rings, mutilated coin should not make the air line distance of edge, gathering sill lower end and foundation plate upper surface be controlled in the 5cm-100cm scope, preferably 10-50cm.For fear of the reflection of sound, scribble sound absorption coating 4,5th on the internal face of casing, be placed on the foundation plate on the box bottom, its upper surface also has the angle of inclination with surface level, is fixed with a sound transducer 6 on foundation plate.7 is two upper and lower weighing plates (parallel-plate) that are parallel to each other, four pressure transducers 8 place two weighing plates between, can guarantee being parallel to each other of two weighing plates preferably.Rotating shaft 9 is fixed on down the lower surface of weighing plate 7, and its two ends are set in the hole of foundation plate side and wall box, plays a supportive role and guarantees to rotate an angle, so that the coin that rests on the weighing plate can be slipped in the following storage case.Motor 10 is fixed on the casing wall, and its main shaft is connected with the external part of rotating shaft 9.Dividing plate 11 is fixed on the casing inner bottom surface, plays the effect of the compartment.13 is the swivel plate at coin exit place.Also be provided with control enclosure 12 in the inner chamber of casing 3, it is placed on the base plate of foundation plate back, is used to deposit the hardware of the control system of this device.
The Coin-discriminating device of present embodiment, can be divided into casing, Coin guiding device, information collecting device and several major parts such as true and false coin tripping device and control system by function, wherein Coin guiding device comprises slot 1 and gathering sill 2, and information collecting device comprises foundation plate 5, sonic transducer 6 and weighing plate 7 and pressure transducer 8; True and false coin tripping device comprises rotating shaft 9, motor 10 and dividing plate 11.
Fig. 2 ~ 3 are the structural representation of embodiment Coin-discriminating device shown in Figure 1.Wherein, gathering sill, weighing plate and dividing plate are made by organic glass; Foundation plate is made by pottery; Sound absorption coating adopts the packing sponge; Sonic transducer 6 adopts BK-4191 type microphone, and pressure transducer 8 adopts widely used piezoelectric patches.As seen from Figure 2, slot 1 is a slot, and the size of gathering sill should be when guaranteeing the smooth and easy downslide of coin energy, and its Width is smaller as far as possible, to guarantee that coin can vertically tumble on the foundation plate 5.Gathering sill 2 and foundation plate 5 upper surfaces all have certain angle with surface level, and the air line distance that guarantees edge, lower end and foundation plate upper surface is selected in OK range, thereby play the guiding role, guarantee that coin tumbles earlier on the foundation plate 5, and then tumble on the weighing plate 7.The angle of inclination of present embodiment gathering sill 2 is 30 °, and the angle of inclination of foundation plate 5 upper surfaces is 15 °, and the air line distance of gathering sill edge, 2 lower end and foundation plate upper surface is 15cm.When original state, the weighing plate upper surface is always horizontal.Described pressure transducer 8 is usually in the rotating shaft both sides, and is symmetrical arranged, to guarantee its level when the original state.Present embodiment is selected four for use.After control system was made differentiation, weighing plate rotated 30 ° of angles to the left or to the right in company with rotating shaft under the drive of motor 10, made coin be slipped to following leaving with in the space.The hardware controls box 12 that present embodiment is deposited control system is rectangular boxes, is fixed on the bottom surface between foundation plate 5 wall box.The lead of being drawn by sound transducer 6 and pressure transducer 8 all inserts in the box, and respectively with power amplifier, charge amplifier conducting.
Process when above-mentioned Coin-discriminating device is used to detect as shown in Figure 4.After coin drops into from slot 1, glide along the gathering sill 2 that tilts, export with certain initial velocity free-falling at gathering sill, sound during coin bump foundation plate 5, the sound collection passage is provided with triggering level, and in a single day sound reach triggering level, sonic transducer 6 collected sound signals, deliver to arrangements for analyzing frequency after amplifying through power amplifier and carry out spectrum analysis, analyze the natural frequency that obtains coin, and relatively carry out frequency spectrum and differentiate with normal data in the spectrum standard memory.Because foundation plate has certain degree of tilt, behind coin and foundation plate 5 bumps, tumbling under inertia and the action of gravity on the weighing plate 7, pressure transducer 8 effect of being under pressure, produce force signal, this signal is input to the gravimetric analysis device through corresponding power amplifier amplification, calculates the weight of coin, and with the weight standard memory in normal data compare, realize the discriminating of weight.The measurement result that frequency spectrum is differentiated and weight is differentiated enters the discriminating that the computing decision-making device carries out analysis-by-synthesis realization coin then.If coin is true, the computing decision-making device sends control signals to the motor 10 in the true and false coin tripping device, and motor 10 drives rotating shafts 9 and rotates a side that weighing plate 7 is turned to deposit genuine note, and genuine note is slipped in the genuine note storing box; Otherwise then make motor 10 backward rotation, make coin fall into the counterfeit money storing box.If coin is true, according to the denomination that identifies, control signal is input to display device, correctly shows the amount of money of coin.
In the control system of above-mentioned Coin-discriminating device embodiment, wherein sound transducer is a BK-4191 type microphone, corresponding power amplifier is the HWD2161 note amplifier, pressure transducer is the piezoelectric ceramic piece that brilliant rich electronics corporation produces, and corresponding power amplifier is a YE5858 type charge amplifier.Described data analysis and decision system (comprising arrangements for analyzing frequency, gravimetric analysis device, spectrum standard memory, weight standard memory and computing decision-making device) are the dsp chips that has the A/D data-interface, for example TMS320F240 type dsp chip is realized data analysis and decision-making by DSP and corresponding fast fourier transform FFT technology; The display device that after-treatment system uses is the TOS-5321ASR light-emitting diode display, circuit of display driving is realized by MAX7219 display interface chip, the DC permanent magnet torque motor that the motor that uses in the tripping device produces as Shaanxi China swallow aircraft instrument company, the driving of motor is realized by the A3952SB chip.
The circuit diagram of control system of the present invention such as Fig. 5, be input to the A/D data port of dsp chip after amplifying by charge amplifier and power amplifier respectively from the pressure signal of pressure transducer and sound transducer, acoustical signal, DSP is through data analysis and decision-making output two path control signal, the control voltage of motor in the true and false coin tripping device wherein is provided behind the driving circuit of pwm signal by A3952SB chip formation, and the SPI signal is input to display device through behind the display interface.
Experiment shows, one piece of monobasic coin is put in the foregoing description Coin-discriminating device, just shows correct identification result after 2 seconds on display device.
Claims (4)
1. Coin-discriminating device, comprise the casing that has slot and be arranged on the interior control system of control enclosure, it is characterized in that, on the internal face of described casing sound absorption coating is arranged, internal orifice edge at slot is provided with gathering sill, the foundation plate that sound transducer is installed is set below this gathering sill, the upper surface of this plate and surface level have 10 °-45 ° pitch angle, it is connected on the base plate of casing, and the air line distance of edge, gathering sill lower end and foundation plate upper surface is in the 10-50 cm range; Inferoanterior at the low side of foundation plate is provided with a leveling board, be fixed with a supporting revolving shaft that can drive the positive and negative rotation of this plate at this plate lower surface, this rotating shaft one end by bearing fixing in the areole of casing, and stretch out that casing is outer to link to each other with motor, the other end by bearing fixing on the thrust of casing inner bottom surface; Also be fixed with a dividing plate on the casing inner bottom surface below rotating shaft, the separated by spaces that this dividing plate encloses foundation plate and cabinet wall bread is to leave with two storage cases true, counterfeit money, and is respectively equipped with the outlet with the true and false coin of exterior; Described sound transducer is by the control system conducting in lead and the control enclosure; Described control enclosure be arranged in the cabinets cavity or casing outward nearby.
2. Coin-discriminating device as claimed in claim 1, it is characterized in that, fix two or more pressure transducers on the described leveling board, and increase again on the pressure transducer one be used to weigh on leveling board, this plate upper surface is lower than the foundation plate upper surface, and described pressure transducer is by the control system conducting in lead and the control enclosure.
3. use the discrimination method of Coin-discriminating device according to claim 1, it is characterized in that, it differentiates that step is: (1) is slipped to tested coin on the foundation plate from slot along gathering sill, sound transducer is gathered the voice signal that sends when tested coin clashes into foundation plate, directly or through delivering to arrangements for analyzing frequency after the power amplifier amplification carry out spectrum analysis, analysis obtains the natural frequency of tested coin, and relatively carries out frequency spectrum and differentiate with normal data in the spectrum standard memory; (2) tested coin tumbles on the last leveling board from foundation plate again, pressure transducer is subjected to the pressure effect that tested coin weight is produced, producing force signal amplifies the back and is input to the gravimetric analysis device through power amplifier, calculate the weight of tested coin, and with the weight standard memory in normal data relatively carry out weight and differentiate; (3) frequency spectrum is differentiated and measurement result that weight is differentiated is input to the computing decision-making device and carries out analysis-by-synthesis and obtain identification result that the computing decision-making device sends control signals to motor according to identification result and makes true and false coin separation, and stores respectively in the different storage cases; (4) according to the genuine note denomination that identifies, control signal is input to display device, shows the amount of money of genuine note.
4. discrimination method as claimed in claim 3, it is characterized in that, when using the Coin-discriminating device of pressure boost sensor not, in discrimination process, omit step (2), described step (3) is: the measurement result that frequency spectrum is differentiated is input to the computing decision-making device and analyzes and obtain identification result, the computing decision-making device sends control signals to motor according to identification result separates true and false coin, and stores in the storage case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510095334A CN100587732C (en) | 2005-11-03 | 2005-11-03 | Coin distinguishing apparatus and its method for distinguishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510095334A CN100587732C (en) | 2005-11-03 | 2005-11-03 | Coin distinguishing apparatus and its method for distinguishing |
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| Publication Number | Publication Date |
|---|---|
| CN1787017A CN1787017A (en) | 2006-06-14 |
| CN100587732C true CN100587732C (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200510095334A Expired - Fee Related CN100587732C (en) | 2005-11-03 | 2005-11-03 | Coin distinguishing apparatus and its method for distinguishing |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021067B (en) * | 2012-12-12 | 2015-02-11 | 北京航天测控技术有限公司 | Coin recognition device |
| CN103617671B (en) * | 2013-12-12 | 2016-08-17 | 广州广电运通金融电子股份有限公司 | The recognition methods of a kind of thickness abnormity banknote and system |
| CN106023393B (en) * | 2016-05-05 | 2019-02-26 | 韶关学院 | A kind of coin throwing sorter |
| CN107134043B (en) * | 2017-06-20 | 2019-07-02 | 安徽工程大学 | Coin category collection method |
| CN109872442B (en) * | 2019-02-15 | 2021-02-02 | 常州万泰天平仪器有限公司 | Coin detection method and system and coin weight detector |
| CN112816165B (en) * | 2020-12-31 | 2023-08-15 | 易旻 | Unique identification system and method based on mechanical vibration characteristics and form matching |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036470A (en) * | 1987-11-24 | 1989-10-18 | Gec-普列斯长途电讯有限公司 | Coin validation apparatus |
| GB2224590A (en) * | 1988-11-05 | 1990-05-09 | Plessey Co Plc | Coin validation apparatus |
| DE19502621A1 (en) * | 1995-01-17 | 1996-07-18 | Trenner D Wh Muenzpruefer | Coin tester for machines |
| US6079262A (en) * | 1995-09-28 | 2000-06-27 | Azkoyen Industrial, S.A. | Coin identification procedure |
| DE19934806A1 (en) * | 1999-07-28 | 2001-02-08 | Fmn Fernmeldetechnik Gmbh Nord | Testing coins for acceptability involves guiding coins to impact baffle plate, comparing resulting sound with stored sound spectrum, permitting use of coin if coincidence detected |
| CN1065641C (en) * | 1994-05-19 | 2001-05-09 | 罗烈尔银行机器股份有限公司 | Coin discriminating apparatus |
| CN1498392A (en) * | 2001-03-22 | 2004-05-19 | 审视硬币工业公司 | Coin discriminating device and method and coin handling machine including such device and method |
| DE10321390A1 (en) * | 2003-05-12 | 2004-12-02 | Ds Automation Gmbh | Acoustic coin identification and sorting method in which a coin is struck with a hard object and the resulting sound waves generated by the resonant vibration of the coin compared with stored reference values |
-
2005
- 2005-11-03 CN CN200510095334A patent/CN100587732C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036470A (en) * | 1987-11-24 | 1989-10-18 | Gec-普列斯长途电讯有限公司 | Coin validation apparatus |
| GB2224590A (en) * | 1988-11-05 | 1990-05-09 | Plessey Co Plc | Coin validation apparatus |
| CN1065641C (en) * | 1994-05-19 | 2001-05-09 | 罗烈尔银行机器股份有限公司 | Coin discriminating apparatus |
| DE19502621A1 (en) * | 1995-01-17 | 1996-07-18 | Trenner D Wh Muenzpruefer | Coin tester for machines |
| US6079262A (en) * | 1995-09-28 | 2000-06-27 | Azkoyen Industrial, S.A. | Coin identification procedure |
| DE19934806A1 (en) * | 1999-07-28 | 2001-02-08 | Fmn Fernmeldetechnik Gmbh Nord | Testing coins for acceptability involves guiding coins to impact baffle plate, comparing resulting sound with stored sound spectrum, permitting use of coin if coincidence detected |
| CN1498392A (en) * | 2001-03-22 | 2004-05-19 | 审视硬币工业公司 | Coin discriminating device and method and coin handling machine including such device and method |
| DE10321390A1 (en) * | 2003-05-12 | 2004-12-02 | Ds Automation Gmbh | Acoustic coin identification and sorting method in which a coin is struck with a hard object and the resulting sound waves generated by the resonant vibration of the coin compared with stored reference values |
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| CN1787017A (en) | 2006-06-14 |
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