CN203849798U - Multi-mode eddy current sensor excitation and detection circuit - Google Patents
Multi-mode eddy current sensor excitation and detection circuit Download PDFInfo
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- CN203849798U CN203849798U CN201420207638.8U CN201420207638U CN203849798U CN 203849798 U CN203849798 U CN 203849798U CN 201420207638 U CN201420207638 U CN 201420207638U CN 203849798 U CN203849798 U CN 203849798U
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- 230000005284 excitation Effects 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 title abstract description 3
- 238000001914 filtration Methods 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 abstract description 6
- 238000005070 sampling Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a multi-mode eddy current sensor excitation and detection circuit. The circuit mainly provides excitation signals for a sensor excitation coil and receives signals from a sensor receiving coil. AD sampling values are converted through an ARM processing circuit, and the authenticity of coins is identified and coins with different face values are differentiated through comparing the sampling values. Three types of different square wave excitation sources are loaded to a sensor transmitting probe. Signal reception of a receiving probe is affected when the coins pass by an eddy current sensor, the existing issued coins can be sorted through processing the received signals, and the type, the number and the authenticity of currencies can be judged as soon as the coins pass by the sensor.
Description
Technical field
The present invention relates to the excitation of multi-modal current vortex sensor and detecting circuit, be mainly cell winding pumping signal is provided, and the signal that receiving coil is produced processes, it belongs to finance device technical field.
Background technology
External Coin sorting system core parts are always in monopolization, domestic Coin sorting system is rarely found, but also have that sorting speed is slow, sorting accuracy rate is low, self study Currency Type extendability is poor, by game money be mistaken for genuine note, genuine note is mistaken for counterfeit money, and leaks the problems such as meter number of coins.For these problems, company has proposed multi-modal current vortex sensor excitation and detecting circuit, it is combined with receiving transducer with current vortex sensor transmitting probe, effectively solved the distinguishing and the sorting problem of multiple coin Currency Type of financial technology field true and false coin, identification accuracy rate is high.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, and a kind of multi-modal current vortex sensor excitation and detecting circuit are provided.
Multi-modal current vortex sensor excitation and a detecting circuit, comprise exciting circuit, receives detecting circuit and ARM master control treatment circuit.
Exciting circuit comprises square wave circuit for generating, integrating circuit, adding circuit, class AB power amplification circuit, first by square-wave generator, produce high frequency, intermediate frequency and low frequency three road square-wave signals, three road square-wave signals produce triangular wave by integrating circuit and export, and power amplification is sent to drive coil through class AB after three road triangular signal stacks, to form complex wave.
Receive detecting circuit and comprise passive RC filtering circuit and rectification circuit.
ARM master control treatment circuit mainly gathers three tunnel simulating signals and is translated into digital signal, and voltage AD value is presented on display screen.
Three road square-wave signals are respectively high frequency frequency 460KHz, IF-FRE 115KHz, Frequency 7.2KHz.
The invention has the beneficial effects as follows Coin sorting excitation is combined with receiving transducer with detecting circuit and sensor emission, a kind of Coin sorting disposal route is provided, the existing various coins of issuing on home market, Renminbi, Euro, dollar are carried out to statistic of classification, and can accurately the various coins of identification true and false, this Coin sorting core component system accuracy is high, speed is fast, and accuracy rate is high.
Accompanying drawing explanation
Fig. 1 is square wave circuit for generating schematic diagram;
Fig. 2 is integrating circuit schematic diagram;
Fig. 3 is adding circuit schematic diagram;
Fig. 4 is class AB power amplification circuit schematic diagram;
Fig. 5 is RC passive filter circuit;
Fig. 6 is precision rectifying detecting circuit.
Embodiment
Multi-modal current vortex sensor excitation and detecting circuit, mainly for detection of the true and false of coin, mainly complete by following step:
By square wave circuit for generating, produced the square-wave signal of three road different frequencies, after integrating circuit, generate three road triangular signals, after the triangular signal aliasing of Jiang San road, form complex wave, afterwards complex signal is input to the transmitting probe of current vortex sensor, because eddy current effect transmitting probe sends to receiving transducer by formed complex signal, carries out signal reception;
True coin is placed between the transmitting probe and receiving transducer of current vortex sensor, because the receiving transducer sensitivity of eddy current effect current vortex sensor goes out the material of described true coin, thickness, after surface detail and diameter information, output voltage signal is to filtering treatment circuit;
Filtering treatment circuit first carries out input signal exporting three roads sine waves after bandpass filtering, and Zai Jiang tri-road sine waves carry out rectification and obtain three road direct current signals, pass to ARM master control collection plate and simulating signal is converted into digital signal after direct current signal is amplified;
Filtering treatment circuit adopts three grades of passive RC filtering modes, and the filtering circuit that high, medium and low three frequencies adopt is identical, and just the value of resistance capacitance is different;
ARM master control borad gathers three road direct current signals and simulating signal is changed into digital signal by display screen, shows.
The present invention is not limited in this definite circuit form, is not deviating under the prerequisite of the scope of the invention, can do to this various forms of changes, and more multiple signals transmitting gathers.Wherein, circumscription of the present invention is in appending claims.
Claims (4)
1. multi-modal current vortex sensor excitation and a detecting circuit, is characterized in that: comprise exciting circuit, receive detecting circuit and ARM master control treatment circuit; Exciting circuit comprises square wave circuit for generating, integrating circuit, adding circuit, class AB power amplification circuit, first by square-wave generator, produce high frequency, intermediate frequency and low frequency three road square-wave signals, three road square-wave signals produce triangular wave by integrating circuit and export, and power amplification is sent to drive coil through class AB after three road triangular signal stacks, to form complex wave.
2. multi-modal current vortex sensor excitation according to claim 1 and detecting circuit, is characterized in that: described reception detecting circuit comprises passive RC filtering circuit and rectification circuit.
3. multi-modal current vortex sensor excitation according to claim 1 and detecting circuit, is characterized in that: described ARM master control treatment circuit mainly gathers three tunnel simulating signals and is translated into digital signal, and voltage AD value is presented on display screen.
4. multi-modal current vortex sensor excitation according to claim 1 and detecting circuit, is characterized in that: described three road square-wave signals are respectively high frequency frequency 460KHz, IF-FRE 115KHz, Frequency 7.2KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207638.8U CN203849798U (en) | 2014-04-25 | 2014-04-25 | Multi-mode eddy current sensor excitation and detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420207638.8U CN203849798U (en) | 2014-04-25 | 2014-04-25 | Multi-mode eddy current sensor excitation and detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849798U true CN203849798U (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420207638.8U Expired - Lifetime CN203849798U (en) | 2014-04-25 | 2014-04-25 | Multi-mode eddy current sensor excitation and detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203849798U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107909707A (en) * | 2017-10-27 | 2018-04-13 | 广州畅阳电子科技有限公司 | A kind of coin recognizing method algorithm and system |
-
2014
- 2014-04-25 CN CN201420207638.8U patent/CN203849798U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107909707A (en) * | 2017-10-27 | 2018-04-13 | 广州畅阳电子科技有限公司 | A kind of coin recognizing method algorithm and system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |
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| DD01 | Delivery of document by public notice |
Addressee: Zhang Qianru Document name: Notice of Termination of Patent Rights |