CN101009027A - Sensor and detecting device for measuring magnetic materials of negotiable securities - Google Patents
Sensor and detecting device for measuring magnetic materials of negotiable securities Download PDFInfo
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- CN101009027A CN101009027A CN 200610004520 CN200610004520A CN101009027A CN 101009027 A CN101009027 A CN 101009027A CN 200610004520 CN200610004520 CN 200610004520 CN 200610004520 A CN200610004520 A CN 200610004520A CN 101009027 A CN101009027 A CN 101009027A
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
This invention relates to one sensor and test device of securities magnetic materials and provides one sensor composed of magnetic sensitive element, shield shell covering on magnetic sensitive element and excitation coil on the shield shell connected with two ends.
Description
Technical field
The present invention relates to a kind of sensor that can detect the various magnetic materials on the securities and pick-up unit that can be applied on the financial machine and tool equipment.
Background technology
Along with the raising of securities anti-counterfeiting performance, the magnetic material kind that adopts on the securities is more and more, for example hard magnetic material, soft magnetic material and non-crystalline material etc. in recent years.In the sensor of prior art, exciting field is to be wrapped in the magnetic field that the coil on the iron core produces by sensor internal to produce by the sub-fraction that magnetic head front clearance clearance leakage goes out.The exciting field intensity of Chan Shenging is less like this, is difficult to detect non-crystalline material, and uses the sensitivity of pick-up unit of this sensor lower.For example, ZL02293456.1 has proposed a kind of sensor, can detect hard magnetic material and soft magnetic material simultaneously, but is difficult to detect non-crystalline material.Therefore need be a kind of highly sensitive, can detect the sensor and the pick-up unit of hard magnetic material, soft magnetic material and non-crystalline material simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of highly sensitively, can detect the sensor and the pick-up unit of hard magnetic material, soft magnetic material and non-crystalline material simultaneously.
According to a first aspect of the invention, provide a kind of sensor, this sensor comprises magnet-sensitive element, covers on the shielding case of described magnet-sensitive element outside and the field coil that is wrapped in the shielding case outside, and the two ends of described field coil link to each other with excitation source.
According to a second aspect of the invention, a kind of securities pick-up unit is provided, and it comprises the sensor as a first aspect of the present invention, and the signal processing apparatus that links to each other with described sensor, this signal processing apparatus comprises low-pass filter in parallel, Hi-pass filter, envelope detector.
The key distinction of the present invention and prior art is, produces the mode difference of exciting field.The exciting field of the sensor among the present invention is to be produced by the coil that is wrapped in the sensor outside.Exciting field of the present invention is not owing to relate to the gap of sensor internal, thereby its exciting field intensity can be far longer than the exciting field in the sensor of prior art, can detect the farther magnetisable material of range sensor.Thereby the present invention specific sensitivity is higher mutually with other sensors.Handle hard magnetic material, soft magnetic material and the non-crystalline material that just can detect in the paper representing value by the signal that sensor is obtained.
Description of drawings
Fig. 1 is a structure principle chart according to an embodiment of the invention;
Fig. 2 is that hard magnetic material according to an embodiment of the invention is through out-of-date oscillograph displayed map;
Fig. 3 is that soft magnetic material according to an embodiment of the invention is through out-of-date oscillograph displayed map;
Fig. 4 is that non-crystalline material according to an embodiment of the invention is through out-of-date oscillograph displayed map.
Fig. 5 is the synoptic diagram of the magnet-sensitive element in the shielding case according to an embodiment of the invention.
Fig. 6 is the synoptic diagram of signal Processing according to an embodiment of the invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, sensor of the present invention comprises magnet-sensitive element M (not shown), covers on the shielding case P and the field coil L of magnet-sensitive element outside.Described magnet-sensitive element M can be a coil, also can be magnetic resistance.Fig. 5 illustrates the example of magnet-sensitive element M, and wherein T is unshakable in one's determination, and G is an inductive coil.
In above-mentioned sensor shown in Figure 1, field coil L is wrapped in the outside of shielding case P, and when logical when going up alternation exciting current I among the field coil L, detection faces S goes up and produces alternating flux H.When the material that is magnetic passed through detection faces S, alternating flux H will change.The variation of the alternating flux that different magnetic materials causes is different.The alternating flux that Fig. 2 causes when being hard magnetic material process detection faces S changes, and the alternating flux that Fig. 3 causes when being soft magnetic material process detection faces S changes, the alternating flux variation that is caused by big barkhausen when Fig. 4 is amorphous material process detection faces S.
The alternating flux that changes can convert corresponding magnetic material signal output by the signal processing apparatus that links to each other with this sensor to, finally distinguishes the classification of magnetic material in the securities.For example as shown in Figure 6, the output signal of magnetic sensor M can draw the hard magnetic material signal after handling through low-pass filter, output signal can draw the non-crystalline material signal through after the high pass filter, processes, and output signal can draw the soft magnetic material signal through behind the envelope detector.
Claims (3)
1. a sensor comprises magnet-sensitive element, covers on the shielding case of described magnet-sensitive element outside and the field coil that is wrapped in the shielding case outside, and the two ends of described field coil link to each other with excitation source.
2. the sensor shown in claim 1, wherein said magnet-sensitive element is coil or magnetic resistance.
3. a securities pick-up unit comprises sensor as claimed in claim 1 or 2, and signal processing apparatus, and this signal processing apparatus comprises low-pass filter in parallel, Hi-pass filter, envelope detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610004520 CN101009027A (en) | 2006-01-25 | 2006-01-25 | Sensor and detecting device for measuring magnetic materials of negotiable securities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610004520 CN101009027A (en) | 2006-01-25 | 2006-01-25 | Sensor and detecting device for measuring magnetic materials of negotiable securities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101009027A true CN101009027A (en) | 2007-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610004520 Pending CN101009027A (en) | 2006-01-25 | 2006-01-25 | Sensor and detecting device for measuring magnetic materials of negotiable securities |
Country Status (1)
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| CN (1) | CN101009027A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672823B (en) * | 2009-10-15 | 2012-07-25 | 中钞特种防伪科技有限公司 | System and method for the online detection of magnetic materials |
| CN101911133B (en) * | 2007-12-28 | 2012-12-05 | 日本电产三协株式会社 | Magnetic pattern detecting apparatus |
| CN103544764A (en) * | 2013-09-12 | 2014-01-29 | 无锡乐尔科技有限公司 | Sensor for recognizing magnetic media |
| CN104361671A (en) * | 2014-11-03 | 2015-02-18 | 苏州保瑟佳货币检测科技有限公司 | Magnetic sensor and magnetic detection method and system based on same |
| CN104484936A (en) * | 2014-11-03 | 2015-04-01 | 苏州保瑟佳货币检测科技有限公司 | Magnetic sensor used for detecting hard magnetic coercive force, detection method and detection system |
-
2006
- 2006-01-25 CN CN 200610004520 patent/CN101009027A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911133B (en) * | 2007-12-28 | 2012-12-05 | 日本电产三协株式会社 | Magnetic pattern detecting apparatus |
| CN101672823B (en) * | 2009-10-15 | 2012-07-25 | 中钞特种防伪科技有限公司 | System and method for the online detection of magnetic materials |
| CN103544764A (en) * | 2013-09-12 | 2014-01-29 | 无锡乐尔科技有限公司 | Sensor for recognizing magnetic media |
| CN103544764B (en) * | 2013-09-12 | 2016-11-16 | 无锡乐尔科技有限公司 | A kind of sensor for identifying magnetic medium |
| CN104361671A (en) * | 2014-11-03 | 2015-02-18 | 苏州保瑟佳货币检测科技有限公司 | Magnetic sensor and magnetic detection method and system based on same |
| CN104484936A (en) * | 2014-11-03 | 2015-04-01 | 苏州保瑟佳货币检测科技有限公司 | Magnetic sensor used for detecting hard magnetic coercive force, detection method and detection system |
| CN104484936B (en) * | 2014-11-03 | 2017-09-19 | 苏州保瑟佳货币检测科技有限公司 | For detecting the coercitive magnetic sensor of Hard Magnetic and detection method and system |
| CN104361671B (en) * | 2014-11-03 | 2017-11-24 | 苏州保瑟佳货币检测科技有限公司 | Magnetic sensor and the Magnetic sensing methods and system based on it |
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Open date: 20070801 |