CN101709949B - Method and device for real-time detection of note thickness - Google Patents
Method and device for real-time detection of note thickness Download PDFInfo
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- CN101709949B CN101709949B CN2009101145825A CN200910114582A CN101709949B CN 101709949 B CN101709949 B CN 101709949B CN 2009101145825 A CN2009101145825 A CN 2009101145825A CN 200910114582 A CN200910114582 A CN 200910114582A CN 101709949 B CN101709949 B CN 101709949B
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- upper roller
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Abstract
The invention provides a method and a device for real-time detection of note thickness. The method comprises that: a microwave generator generates and sends microwave pulse signals into magnetic field exciting coils to obtain a high frequency alternating magnetic field; driven upper rollers are positioned in the magnetic field; notes pass between the upper rollers and lower rollers; the upper rollers float; detection sensors detect magnetic signals reflected by the upper rollers; the magnetic signals are converted into electrical signals which are processed through a circuit and then sent into a microprocessor; a thickness value of the notes is obtained in real time through the corresponding relation between the changes of resonance frequency and the thickness of the notes; the value is sent to a display to be displayed; and an alarm is given when the thickness exceeds a set value. The detection sensors formed by inlaying the magnetic field exciting coils and detection coils are right above every upper roller, and are connected to the microprocessor through frequency-dividing phase-locking circuits and shaping circuits respectively. Data of the relation between the thickness of the notes and the value of microwave pulse frequency, as well as processing programs is stored in the microprocessor, and the microprocessor is connected with the display and an alarm. The method and the device have the advantage of automatically identifying various note defects, along with detection convenience, rapidness and accuracy.
Description
(1) technical field
The present invention relates to paper class detection technique field, be specially a kind of banknote thickness real-time detection method and device.
(2) technical background
Paper class, particularly bank note need be carried out accurately banknote thickness, overlapping, unfilled corner, breakage etc., at present the detection method and the relevant device of existing multiple bank note.Wherein contactless checkout equipment mainly is to use Hall element or ultraviolet, infrared sensor or laser, ccd image sensor or strain-ga(u)ge transducer or ultrasound wave etc.Like the patent No. is that the patent of invention " paper money thickness testing apparatus " of 200710177538.X ZhongChao ChangCheng finance equipment Stock Co., Ltd is the magnet steel and corresponding Hall element that adopts on the transmission arm, obtains high-precision banknote thickness testing result.Application number is the application for a patent for invention " paper money thickness testing apparatus " of 200620093037.4 Shenyang Zhongchao Xinda Financial Equipment Co., Ltd..
The maximum shortcoming of the method for present above-mentioned detection bank note and various kinds of equipment is to respond slowlyer, is difficult to and matched with devices such as high speed standard national currency machine, cleaning-sorting machine and paper money counter are used.
(3) summary of the invention
The objective of the invention is to design a kind of banknote thickness real-time detection method; This method motivates high-frequency alternating magnetic field through the microwave pulse sequence signal; Bank note passes through between last bottom roller, not upper and lower displacement simultaneously of the banknote thickness of driven upper roller under it of floating, and the upper roller displacement produces the magnetic field eddy current; Its reflection and refraction electromagnetic wave are according to the amplitude power of its reflection or refraction electromagnetic signal, the thickness of contactless real-time detection bank note.
Another object of the present invention is based on a kind of banknote thickness real-time detection apparatus of said method design.
The banknote thickness real-time detection method of the present invention design based on principle be: measured object is in the magnetic field of microwave electric pulse excitation; The displacement of measured object changes the magnetic linkage path distance of itself and driving source; Detect the magnetic signal of measured object reflection or refraction, can learn its displacement.Bank note passes through between last bottom roller, and the banknote thickness that passes through is different, and the driven upper roller upper and lower displacement of floating is different, is the amounts of thickness variation that measured object can obtain bank note with this upper roller.
The banknote thickness real-time detection method of the present invention's design comprises that step is following:
1. microwave generator generation frequency is the microwave pulse signal of 1MHz～3000MHz, regulates according to the unlike material of roller;
2. this pulse signal is sent into magnetic field coil, makes it to become humorous vibration source, motivates high-frequency alternating magnetic field;
3. bank note passes through between last bottom roller, and driven upper roller can fluctuate, and upper roller is in 2. described magnetic field coil below, is in the high-frequency alternating magnetic field;
4. the detecting sensor of upper roller top detects the magnetic signal of driven upper roller reflection;
5. the magnetic signal that obtains of detecting sensor converts through it that electric signal amplifies the back and the magnetic field coil pulse signal is sent into microprocessor through processing of circuit together into, and microprocessor relatively detects the be reflected frequency increment of effect of signals of humorous vibration source;
6. pass through the corresponding relation of the amounts of thickness variation of change of resonance frequency increment and bank note, obtain in real time from the banknote thickness value of passing through between the last bottom roller;
7. bank note through roller after in 5 milliseconds one-tenth-value thickness 1/10 deliver to display and show, when thickness surpasses setting value, report to the police.
Thickness real-time detection method according to the bank note of the invention described above; The present invention has designed the banknote thickness real-time detection apparatus, comprises the last bottom roller of bank note from passing through between it, and bottom roller is installed on the main drive shaft of level; Upper roller is installed on the soft of driven shaft and puts, and can fluctuate.Width of channel is greater than the length of maximum bank note between the last bottom roller.This device has 6～12 pairs to go up bottom roller.There is a detecting sensor top of each upper roller.Each detecting sensor comprises a magnetic field coil and a magnetic test coil, and two coils are nested to be one, and coil diameter is 5～8mm, and length is 7～10mm.Two coil is the enameled wire of the diameter 0.3～1.0mm of 3～12 circles.The center of magnetic test coil is through the vertical center line of its below upper roller corresponding with it, and the spacing of coil is 12～20mm.During no test sample, the spacing of magnetic test coil lower end and this upper roller peak is 3～5mm between the last bottom roller.
Each magnetic field coil of this device connects each microwave pulse signal excitation circuit, and each magnetic test coil connects amplifying circuit, be linked in sequence after each amplifying circuit each frequency division phase lock circuitry, shaping circuit, and the output of each shaping circuit inserts microprocessor.The feedback output end of each microwave pulse signal excitation circuit inserts each frequency division phase lock circuitry through electric capacity.Microprocessor is connected with each microwave pulse signal excitation circuit, controls the microwave pulse signal of its generation.The microprocessor internal memory contains different banknote thickness and microwave pulse signal frequency value relation data and analysis comparison process program.Microprocessor is connected with display.Alarm module is arranged in the microprocessor, and be connected to alarm.Maximum with the minimum setting value of thickness is arranged in the alarm module, excessive or too small when exceeding setting value when institute's Thickness Measurement by Microwave, start alarm equipment alarm.
The advantage of banknote thickness real-time detection method of the present invention and device is: 1, discern various bank note knuckles automatically, and overlapping, tape, and the different counterfeit money of thickness; 2, measuring speed is fast, in 5 milliseconds, even can obtain the result in 1.7 milliseconds, and non-contact detection is fit to and supporting uses such as cleaning-sorting machine and paper money counter; 3, the interference performance of anti-electromagnetic field is strong; 4, measuring accuracy is high, and minimum resolution reaches 0.01mm; Measurement range is 0～5mm; 5, easy to use; Be applicable to the real-time detection of bank note or paper article, also can be used for the accurately detection of the fine sheet of control thickness of needs such as Copper Foil, aluminium foil; 5, cost performance is high, and the life-span is long; 6, device is compact, small and exquisite, is easy to carry.
(4) description of drawings
Fig. 1 looks synoptic diagram for this banknote thickness real-time detection apparatus embodiment mounting structure master;
Fig. 2 is that the A-A of Fig. 1 is to sectional view;
Fig. 3 is this banknote thickness real-time detection apparatus embodiment circuit structure schematic block diagram.
Label is among the figure:
1, support, 2, circuit module, 3, upper roller, 4, circuit board, 5, detecting sensor, 6, button, 7, bottom roller, 8, supply socket.
(5) embodiment
Banknote thickness real-time detection method embodiment
This banknote thickness real-time detection method embodiment comprises the steps:
1. microwave generator generation frequency is the microwave pulse signal of 250MHz～350MHz;
2. this pulse signal is sent into magnetic field coil, makes it to become humorous vibration source, motivates high-frequency alternating magnetic field;
3. bank note passes through between last bottom roller, and driven upper roller can fluctuate, and upper roller is in 2. described magnetic field coil below, is in the high-frequency alternating magnetic field;
4. the detecting sensor of upper roller top detects the magnetic signal of driven upper roller reflection;
5. the magnetic signal that obtains of detecting sensor is sent into microprocessor after it converts electric signal into, and microprocessor relatively detects the be reflected frequency increment of effect of signals of humorous vibration source;
6. pass through the corresponding relation of the amounts of thickness variation of change of resonance frequency increment and bank note, obtain in real time from the banknote thickness value of passing through between the last bottom roller;
7. one-tenth-value thickness 1/10 send display to show, when thickness surpasses setting value, reports to the police.
Banknote thickness real-time detection apparatus embodiment
This banknote thickness real-time detection apparatus such as Fig. 1, shown in Figure 2 comprise the upper roller 3 and bottom roller 7 of bank note from passing through between it, and main drive shaft and driven shaft are installed on the support 1.Bottom roller 7 is installed on the main drive shaft of level, and upper roller 3 is installed on the soft of driven shaft and puts, and can fluctuate.Last bottom roller 3, between 7 width of channel greater than the length of hundred yuan notes of maximum.This example has 10 pairs to go up bottom roller 3,7.The top of support 1 is a circuit board 4, and corresponding each upper roller 3 place of circuit board 4 respectively are equipped with a detecting sensor 5, and each detecting sensor 5 comprises a magnetic field coil and a magnetic test coil, and two coils are nested to be one.Magnetic field coil or magnetic test coil diameter are 10mm, and length is 9.5mm, and two coil is the enameled wire coiling of the diameter 0.8mm of 10 circles.The center of each magnetic test coil is through the vertical center line of its below upper roller 3 corresponding with it, last bottom roller 3, between 7 during no test sample, and the magnetic test coil lower end is 4mm with the spacing maximal value of corresponding upper roller 3 peaks, minimum value is 0.1mm.
The circuit structure of this device is as shown in Figure 3; Each magnetic field coil connects the output terminal of each microwave pulse signal excitation circuit; Each magnetic test coil connects amplifying circuit, be linked in sequence after each amplifying circuit each frequency division phase lock circuitry, shaping circuit, and the output of each shaping circuit inserts microprocessor.The output feedback of each shaping circuit inserts each microwave pulse signal excitation circuit, and is stable with the pulse signal that guarantees its generation.The feedback output end of each microwave pulse signal excitation circuit inserts each frequency division phase lock circuitry through electric capacity.Each circuit is integrated in the different circuit modules 2.Each circuit module 2 all is installed on the circuit board 4 with microprocessor.Power module on the circuit board 4 is connected with supply socket 8, and power module is given each circuit module 2 and microprocessor power supply.
The microprocessor internal memory contains different banknote thickness and microwave pulse signal frequency value relation data and analysis comparison process program.Microprocessor is connected with display.Alarm module is arranged in the microprocessor, and be connected to alarm.Maximum with the minimum setting value of thickness is arranged in the alarm module, excessive or too small when exceeding setting value when institute's Thickness Measurement by Microwave, start alarm equipment alarm.Microprocessor has serial line interface, is used for and the host computer data communication.
After the energized, bottom roller 7 rotates, and bank note is sent into from going into the coin mouth, and each detecting sensor 5 is carried out data acquisition automatically, and sends into interlock circuit and handle, and the result shows at display, when banknote thickness surpasses setting value, reports to the police.
Measured result is as shown in table 1 in this example.Behind the microwave pulse signal frequency process frequency division that each magnetic field coil produces in the table 1 is 52MHz.It is directly related with the sample actual (real) thickness to detect frequency resultant by the visible this law of the measured frequency resultant of different-thickness sample microprocessor in the table 1, and the result is stable, and error is less than 0.3%, so the correct thickness of timely test sample of this device.
The thickness transducer device measured result of table 1 bank note and ribbon
Claims (9)
1. banknote thickness real-time detection method is characterized in that comprising that step is following:
1. microwave generator produces the microwave pulse signal, regulates according to the unlike material of roller;
2. this pulse signal is sent into magnetic field coil, makes it to become humorous vibration source, motivates high-frequency alternating magnetic field;
3. bank note passes through between upper roller and bottom roller, and driven upper roller can fluctuate, and upper roller is in 2. described magnetic field coil below, is in the high-frequency alternating magnetic field;
4. the detecting sensor of upper roller top detects the magnetic signal of driven upper roller reflection;
5. the magnetic signal that obtains of detecting sensor converts through it that electric signal amplifies the back and the magnetic field coil pulse signal is sent into microprocessor through processing of circuit together into, and microprocessor relatively detects the be reflected frequency increment of effect of signals of humorous vibration source;
6. pass through the corresponding relation of the amounts of thickness variation of change of resonance frequency increment and bank note, obtain in real time from the banknote thickness value of passing through between upper roller and the bottom roller;
7. bank note through roller after one-tenth-value thickness 1/10 deliver to that display shows or host computer, when thickness surpasses setting value, report to the police.
2. banknote thickness real-time detection method according to claim 1 is characterized in that:
The microwave pulse signal frequency that the 1. middle microwave generator of said step produces is 1MHz～3000MHz.
3. the banknote thickness real-time detection apparatus of banknote thickness real-time detection method design according to claim 1 and 2; Comprise upper roller (3) bottom roller (7) of bank note from passing through between it; Bottom roller (7) is installed on the main drive shaft of level, and width of channel is greater than the length of bank note between upper roller (3) and the bottom roller (7); It is characterized in that:
Said upper roller (3) is installed on the soft of driven shaft and puts, and can fluctuate, and 6～12 pairs of upper rollers (3), bottom roller (7) are arranged; There is a detecting sensor (5) top of each upper roller (3); Each detecting sensor (5) comprises a magnetic field coil and a magnetic test coil, and two coils are nested to be one, on the vertical center line of the upper roller (3) that the center of magnetic test coil is thereunder corresponding with it;
Above-mentioned each magnetic field coil connects each microwave pulse signal excitation circuit, and each magnetic test coil connects amplifying circuit, be linked in sequence after each amplifying circuit each frequency division phase lock circuitry, shaping circuit, and the output of each shaping circuit inserts microprocessor; The feedback output end of each microwave pulse signal excitation circuit inserts each frequency division phase lock circuitry through electric capacity; Microprocessor is connected with each microwave pulse signal excitation circuit, and the microprocessor internal memory contains different banknote thickness and microwave pulse signal frequency value relation data and analysis comparison process program.
4. banknote thickness real-time detection apparatus according to claim 3 is characterized in that:
Said magnetic field coil or magnetic test coil diameter are 5～8mm, and length is 7～10mm, and spacing is 12～20mm.
5. banknote thickness real-time detection apparatus according to claim 4 is characterized in that:
Said magnetic field coil or magnetic test coil are the enameled wire of the diameter 0.3～1.0mm of 3～12 circles.
6. banknote thickness real-time detection apparatus according to claim 3 is characterized in that:
Between said upper roller (3) and the bottom roller (7) during no test sample, the magnetic test coil lower end is 0.1～5.0mm with the spacing of corresponding upper roller peak.
7. banknote thickness real-time detection apparatus according to claim 3 is characterized in that:
Said microprocessor connects display and host computer respectively.
8. banknote thickness real-time detection apparatus according to claim 3 is characterized in that:
In the said microprocessor alarm module is arranged, maximum with the minimum setting value of thickness is arranged in the alarm module, alarm module is connected to alarm.
9. banknote thickness real-time detection apparatus according to claim 3 is characterized in that:
The output feedback of said each shaping circuit inserts each microwave pulse signal excitation circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101145825A CN101709949B (en) | 2009-11-24 | 2009-11-24 | Method and device for real-time detection of note thickness |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101145825A CN101709949B (en) | 2009-11-24 | 2009-11-24 | Method and device for real-time detection of note thickness |
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| CN101709949A CN101709949A (en) | 2010-05-19 |
| CN101709949B true CN101709949B (en) | 2012-01-11 |
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| CN102609760A (en) * | 2011-01-20 | 2012-07-25 | 浙江方泰电器有限公司 | Adhered sheet detection system of cash counting machine |
| CN105021613B (en) * | 2014-04-24 | 2018-08-07 | 奥蒂玛光学科技（深圳）有限公司 | Circuit board double-side detection equipment |
| CN105021614A (en) * | 2014-04-24 | 2015-11-04 | 奥蒂玛光学科技（深圳）有限公司 | Detection equipment for circuit board and conveying mechanism for detection equipment |
| CN105021612B (en) * | 2014-04-24 | 2018-10-23 | 奥蒂玛光学科技（深圳）有限公司 | Circuit board double-side detection equipment |
| CN105004721B (en) * | 2014-04-24 | 2018-04-13 | 奥蒂玛光学科技（深圳）有限公司 | Circuit board double-side detection equipment |
| CN105427447B (en) * | 2015-11-04 | 2018-03-16 | 东方通信股份有限公司 | ATM note detection device and detection method |
| CN105374106B (en) * | 2015-11-04 | 2018-03-16 | 东方通信股份有限公司 | A kind of ATM note detection device and detection method |
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| CN110425973A (en) * | 2019-08-29 | 2019-11-08 | 威海华菱光电股份有限公司 | Thickness detection apparatus, method, system, storage medium and processor |
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| CN112481784A (en) * | 2020-11-20 | 2021-03-12 | 沈晓艳 | Measuring, detecting and adjusting integrated textile machine |
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