CN102016941A - Detection device - Google Patents
Detection device Download PDFInfo
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- CN102016941A CN102016941A CN200880023442.0A CN200880023442A CN102016941A CN 102016941 A CN102016941 A CN 102016941A CN 200880023442 A CN200880023442 A CN 200880023442A CN 102016941 A CN102016941 A CN 102016941A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Power Sources (AREA)
- Alarm Systems (AREA)
Abstract
Provided is a detection device (10) that detects a pulse voltage generated by a magnetic sensor such as, for example, a magnetic element (11) capable of causing a large Barkhausen jump. The detection device (10) is characterized in that the device comprises a power supply generation circuit (12) for generating an electric power by making use of a pulse voltage generated by the magnetic sensor and a processing circuit (13) operating by the electric power generated by the power supply generation circuit (12) and executing a predetermined process.
Description
Technical field
The present invention relates to a kind of pick-up unit, be meant a kind of pulse voltage that will produce based on magnetic sensor and pick-up unit that the signal that produces sends, above-mentioned magnetic sensor is as being magnetic element that can produce big Barkhausen jump etc.
Background technology
In the prior art, the known pick-up unit of people, be applied in the every field of the switch etc. of electric and electronic equipment, the signal that will produce based on a kind of pulse voltage sends, and this pulse voltage is to produce according to the position of the object in moving or moving direction.
As the pick-up unit of this prior art, for example, proposing has such scheme, has on the device: current detection circuit is connected on the normally closed action contact of contact theft-proof sensor and the sensor circuit portion that constitutes; This sensor circuit portion is sent the pulse-generating circuit portion that the intermittent pulse signal is used as monitor signal with certain cycle; Signal processing part with judegment part, this judegment part detects the electric current that produces according to the conversion of above-mentioned action contact in current detection circuit changes, differentiate the signal that above-mentioned theft-proof sensor sends, so that the radio portion of posting a letter work (for example, with reference to patent documentation 1).
Patent documentation 1: Japanese documentation is speciallyyed permit communique No. 2900094
Yet, on the device of in above-mentioned patent documentation 1, being put down in writing, because sending to the monitor signal of sensor circuit portion when monitoring is pulse signal, so, though with also can reduce the electric weight that battery consumes when theft-proof sensor is connected, but in order to form monitor signal, in current detection circuit, electric current must usually be arranged, power supply must be set in addition.Therefore, when must carrying out periodic maintenance, also have complex structure, be difficult to improve the reliability problems of pick-up unit power supply.
And, on one type of prior art syringe, usually must import very large energy (electric power) from external power source, so must consider explosion-proof the grade on the safe equipment, in distribution, must need huge safeguard construction in order to be applied to.Therefore, the pick-up unit of prior art must considered that the application on the above-mentioned safe equipment comes down to impossible.
Summary of the invention
For addressing the above problem, the present invention has been proposed, the object of the present invention is to provide a kind of pick-up unit, because of it does not need power supply, so when not needing to safeguard, also realized the simplification of structure and the raising of reliability.
For achieving the above object, pick-up unit of the present invention, the pulse voltage that magnetic sensor is produced detects, and comprises: power supply generation circuit, its pulse voltage of utilizing above-mentioned magnetic sensor to produce produces electric power; Treatment circuit, its electric power that utilizes above-mentioned power supply generation circuit to produce carries out specific processing.
And above-mentioned magnetic sensor also can be for producing the magnetic element of big Barkhausen jump.
In addition, above-mentioned power supply generation circuit comprises: the rectification circuit that the pulse voltage that above-mentioned magnetic element is produced is carried out rectification with chargeable filtering circuit, makes the voltage after the above-mentioned rectification circuit rectification become steady by this filtering circuit.Above-mentioned treatment circuit comprises: the voltage that utilizes above-mentioned filtering circuit to charge starts the startup treatment circuit of processing, handles with the startup of being undertaken by this startup treatment circuit and exports the signal transmission treatment circuit that signal specific is handled.
Also have, pick-up unit of the present invention also can be arranged on the theft-proof sensor, and at this moment, the processing that above-mentioned startup treatment circuit is carried out comprises that generation is used for determining the identification code of this theft-proof sensor position.
Pick-up unit of the present invention, the pulse voltage that magnetic sensor produced based on magnetic element that can produce big Barkhausen jump etc., power supply generation circuit produces (output) electric power, the electric power that treatment circuit utilizes power supply generation circuit to produce comes work, so, if adopt the present invention, do not need to be provided with in addition power supply.Therefore, when can saving electric power, not needing to safeguard, because simple in structure, can also reduce cost again, improve the reliability of device.
Description of drawings
Fig. 1 is the block diagram of the general configuration of the related theft-proof sensor of expression embodiment of the present invention;
(a) among Fig. 2 expression be, on the related theft-proof sensor of embodiment of the present invention, the pulse voltage that magnetic element 11 is produced, (b) expression by 12 rectifications of power supply generation circuit and the output voltage stably that becomes;
What Fig. 3 represented is, on the related theft-proof sensor of embodiment of the present invention, and the mensuration circuit of making in order to measure the output voltage shown in (b) among Fig. 2.
Embodiment
Below, with reference to accompanying drawing on one side embodiments of the present invention described on one side.In the following description, be that example describes with the situation that pick-up unit of the present invention is used for theft-proof sensor.
Before the related theft-proof sensor of explanation embodiment of the present invention, be example at first, the structure and the characteristic of the magnetic element that can produce big Barkhausen jump that uses on this theft-proof sensor (below also can abbreviate magnetic element as) described with the most general wire composite magnetic device known to the public.
When fine wire is made in the alloy wire drawing of strong magnetic material, because of this filament of the reason of alloying component can have unique magnetic speciality.If this strong magnetic material filament is applied distorting stress, it is big more at this moment to reverse degree the closer to the filament peripheral part, and it is more little to reverse degree the closer to central part, so its peripheral part has different magnetic characteristics with central part.If this material handled this state is remained, just made magnetic filament at the peripheral part strong magnetic material different with the central part magnetic characteristic.And the magnetic characteristic of peripheral part is to change its direction of magnetization by less magnetic field.Relative therewith, central part need change its direction of magnetization by the magnetic field bigger than peripheral part.That is, on a magnetic filament, formed the composite magnetic with 2 kinds of different magnetic characteristics, its peripheral part has and is easier to magnetized magnetic characteristic, and central part difficulty is magnetized.This composite magnetic is a uniaxial anisotropy., claim that peripheral part is the soft magnetic quality layer here, central part is a Hard Magnetic matter layer, at this such composite magnetic filament is called filamentous composite magnetic device.
That direction magnetization of the soft magnetic quality layer of this composite magnetic filament and Hard Magnetic matter course is unfixed when initial, presents mixed and disorderly state.In the line length direction of this composite magnetic filament, i.e. the direction that parallels with axis, the external magnetic field that upset takes place the direction of magnetization that applying is enough to make Hard Magnetic matter layer, the soft magnetic quality layer is magnetized along identical direction of magnetization with Hard Magnetic matter layer.Then, with opposite before direction, apply the external magnetic field that can only magnetize the soft magnetic quality layer.Consequently, the composite magnetic filament is presented on the direction opposing magnetization state that is magnetized on soft magnetic quality layer and the Hard Magnetic matter layer.Because be uniaxial anisotropy, so even remove the external magnetic field in this state, the direction of magnetization of soft magnetic quality layer is subjected to the effect of Hard Magnetic matter layer, its magnetized state is also more stable.The external magnetic field of this moment is called magnetic field, location.Then, apply the external magnetic field and the intensity in this magnetic field is increased at reverse direction with magnetic field, location.When the intensity of external magnetic field was crossed a certain critical value, rapid reverse took place in the direction of magnetization of soft magnetic quality layer.This magnetic field is called critical magnetic field.The magnetic wall that the reverse phenomenon of this moment causes the soft magnetic quality layer is as the mobile response as the collapse.Consequently, soft magnetic quality layer and the direction of magnetization of the Hard Magnetic matter layer identical initial state that turns back to that becomes.The external magnetic field that applies in advance is the magnetic field bigger than critical magnetic field strength.This magnetic field is called reset magnetic field.The mobile phenomenon of magnetic wall as this as collapse is called big Barkhausen jump.The speed of magnetic wall (variation of flux density) only depends on this big Barkhausen jump and it doesn't matter with the external magnetic field.
More than, for the example of filamentous magnetic element, the magnetic element that can produce big Barkhausen jump is described, yet, in the present invention, be not limited to so filamentous composite magnetic device, also can use other various magnetic elements with identical characteristics.And above-mentioned composite magnetic device has soft magnetic quality layer and Hard Magnetic matter layer, but as the magnetic element that can produce big Barkhausen jump, also can adopt the magnetic element of the composite bed with such soft magnetic quality layer and Hard Magnetic matter layer.For example, can open disclosed film shaped technology among the flat 4-218905, form the magnetic material of film like, its magnetic element as film like is used by using the Japanese documentation spy.So the magnetic element that can produce big Barkhausen jump described here comprises all of various magnetic elements with performance as mentioned above.And, if will adopt tabular or membranaceous magnetic element the time, also can adopt planar coil.
Below, with reference to Fig. 1 on one side embodiments of the present invention related theft-proof sensor described on one side.Fig. 1 is the block diagram of the general configuration of the related theft-proof sensor of expression embodiments of the present invention.
This theft-proof sensor 10 is, the pick-up unit that the pulse voltage that the magnetic element 11 that can produce big Barkhausen jump is produced detects, and it structurally comprises: power supply generation circuit 12, its pulse voltage of utilizing magnetic element 11 to produce produces electric power; Treatment circuit 13, its microcomputer etc. that is carried out specific operational processes by the electric power that utilizes power supply generation circuit 12 to produce constitutes; Storage part 14 wherein stores the identification code that is used for determining theft-proof sensor 10 positions etc.; The portion 15 that posts a letter, it is by RFID formations such as (Radio Frequency Identification).
The structure that signal sends treatment circuit 19 is, for example, if theft-proof sensor 10 carries out signal when sending by electric wave, signal sends treatment circuit 19 and is made of the post a letter antenna etc. of usefulness of modulation or electric wave.In addition, this signal sends to be handled, and also can be undertaken by sound wave or light etc. except that electric wave, can also carry out with IC etc. by RFID tag except that microcomputer.
In addition, around magnetic element 11, be wound with magnetic test coil 20, a lead-out terminal 20a of this magnetic test coil 20 is connected with rectification circuit 16, another lead-out terminal 20b is connected with shared signal wire 21, and this common signal line 21 sends treatment circuit 19 and is connected respectively with filtering circuit 17, startup treatment circuit 18, signal successively.
Below, on one side with reference to (a) among Fig. 1 and Fig. 2 with (b) on one side the duty of the related theft-proof sensor 10 of embodiments of the present invention is described.Wherein, (a) is the figure of the pulse signal of expression magnetic element 11 generations among Fig. 2, among Fig. 2 (b) for being illustrated in the power supply generation circuit 12 by the figure of the voltage of exporting after rectification and the filtering, shown in Figure 3 in order to measure the mensuration circuit of the output voltage of (b) expression among Fig. 2.
When antitheft, if there are abnormal conditions to take place, shown in (a) among Fig. 2, thereby the magnetic element 11 that can produce big Barkhausen jump just detects the variation in magnetic field and produces pulse voltage, this pulse voltage outputs in the power supply generation circuit 12, shown in (b) among Fig. 2, pulse voltage is by rectification circuit 16 rectifications, and filtering circuit 17 is charged makes voltage become steady simultaneously.At this moment, as shown in Figure 1, because the anode of rectification circuit 16 is connected with magnetic element 11, and negative electrode is connected with filtering circuit 17, so, can prevent that when filtering circuit 17 is charged voltage reversal from turning back in the magnetic element 11, and also can stop the pulse voltage of negative half period to produce simultaneously.
Start treatment circuit 18 and have the function that monitors the voltage that is recharged in the filtering circuit 17, when rising to the degree that can make treatment circuit 13 work as if this voltage that is input to treatment circuit 13, starting treatment circuit 18 under the effect in the forward position of above-mentioned pulse voltage triggers, at this moment, starting treatment circuit 18 starts working, according to the data that are stored in the storage part 14, generate the identification code of this theft-proof sensor 10, or the startup that signal thereafter sends treatment circuit 19 necessary processing etc. is handled.
Afterwards, signal sends treatment circuit 19, and carrying out the portion of posting a letter 15 is essential processing, and the portion 15 that posts a letter outputs to the identification code of this theft-proof sensor 10 among the figure not on the main device in center of expression, by this identification code, the main device in center can determine it is the action which theft-proof sensor 10 takes place.
For example, the example shown in (b) is among Fig. 2, with the mensuration circuit shown in Fig. 3, sensor with the output pulse signal as shown in (a) among Fig. 2 is measured measured output voltage, as a series of action of above-mentioned theft-proof sensor 10 during in, from the duration of the voltage of the output 100mV of power supply generation circuit 12 be 10m second, and the command process speed of microcomputer etc. that constitutes treatment circuit 13 is in several microseconds.That is to say, drop to below the operating voltage of treatment circuit 13 at the output voltage of power supply generation circuit 12 before, above-mentioned processing operation just can be finished, thereby theft-proof sensor 10 does not need power supply.In addition, in the mensuration circuit of example shown in Figure 3, electric current flows through the resistance of 100k Ω, this is the power consumption ability that needs of estimation treatment circuit 13 and the mensuration circuit of making, yet, in the reality, certainly select the output performance, voltage, electric current, effective time etc. of sensor according to necessary contents processing actual in the treatment circuit 13.
If adopt the related theft-proof sensor 10 of aforesaid embodiments of the present invention, adopt such design because be, promptly the pulse voltage power supply generation circuit 12 that is produced based on the magnetic element 11 that can produce big Barkhausen jump produces electric power, the electric power that treatment circuit 13 utilizes power supply generation circuit 12 to produce comes work, so, do not need to be provided with in addition power supply.Thereby, when can saving electric power, not needing to safeguard, because do not need complicated distribution, simple in structure, can reduce cost again, improve the reliability of device.
In addition, because treatment circuit 13 is that trigger voltage starts with the pulse voltage that magnetic element 11 produces, so even without the actuating signal that comes from the main device in center, theft-proof sensor 10 also can be worked.Therefore, can realize monitoring in real time, and can not occur because of sending a plurality of interrogation signal simultaneously between main device in above-mentioned center and the theft-proof sensor 10, thereby cause the load of the main device in center to increase or problem such as loss of data.
Also have, because the theft-proof sensor of embodiment of the present invention 10 does not need to provide external power source, so, even it is applied in essential explosion-proof the grade on the safe equipment of considering, also huge safeguard construction needn't be set on distribution.Thereby the theft-proof sensor 10 of embodiment of the present invention can easily be applied in so explosion-proof grade on the safe equipment of essential consideration, has realized the expansion of usable range.
In the illustrated in the above embodiment, use can produce the magnetic element of big Barkhausen jump, be used as producing the magnetic sensor of electric power according to the changes of magnetic field of outside, yet, the present invention is not limited to this situation, can also use, for example, electromagnetic pickup etc. can produce the magnetic element magnetic sensor in addition of big Barkhausen jump.
In addition, in the illustrated in the above embodiment, pick-up unit of the present invention is applied to theft-proof sensor 10, yet, this is an example, and the present invention can also be applied to the liquid level management devices of refrigerator doors, phone cover, motor vehicle fuel or fuel oil etc., the pick-up unit in other various fields such as vibration detecting sensor, seismograph certainly.
Claims (according to the modification of the 19th of treaty)
1. pick-up unit, the pulse voltage that magnetic sensor is produced detects, and it is characterized in that, comprising:
Power supply generation circuit, its pulse voltage of utilizing above-mentioned magnetic sensor to produce produces electric power;
Treatment circuit, its electric power that utilizes above-mentioned power supply generation circuit to produce carries out specific processing,
Above-mentioned power supply generation circuit comprises: the rectification circuit that the pulse voltage that above-mentioned magnetic element is produced is carried out rectification, and with chargeable filtering circuit, the voltage after the above-mentioned rectification circuit rectification is become steadily by this filtering circuit,
Above-mentioned treatment circuit comprises: the voltage that utilizes above-mentioned filtering circuit to charge starts the startup treatment circuit of processing, and handle with the startup of being undertaken by this startup treatment circuit and export the signal transmission treatment circuit that signal specific is handled,
Above-mentioned startup treatment circuit has the function of the monitoring voltage that above-mentioned filtering circuit charged, after this voltage that outputs to above-mentioned treatment circuit rises to the degree that can make above-mentioned treatment circuit work, forward position by above-mentioned pulse voltage is triggered the startup treatment circuit, begins to start processing.
2. pick-up unit according to claim 1 is characterized in that, above-mentioned magnetic sensor is for producing the magnetic element of big Barkhausen jump.
3. according to claim 1 or 2 any described pick-up units, it is characterized in that it is arranged on the theft-proof sensor, the processing that above-mentioned startup treatment circuit is carried out comprises that generation is used for determining the identification code of this theft-proof sensor position.
Claims (4)
1. pick-up unit, the pulse voltage that magnetic sensor is produced detects, and it is characterized in that, comprising:
Power supply generation circuit, its pulse voltage of utilizing above-mentioned magnetic sensor to produce produces electric power;
Treatment circuit, its electric power that utilizes above-mentioned power supply generation circuit to produce carries out specific processing.
2. pick-up unit according to claim 1 is characterized in that, above-mentioned magnetic sensor is for producing the magnetic element of big Barkhausen jump.
3. according to claim 1 or 2 any described pick-up units, it is characterized in that,
Above-mentioned power supply generation circuit comprises: the rectification circuit that the pulse voltage that above-mentioned magnetic element is produced is carried out rectification, and with chargeable filtering circuit, the voltage after the above-mentioned rectification circuit rectification is become steadily by this filtering circuit,
Above-mentioned treatment circuit comprises: the voltage that utilizes above-mentioned filtering circuit to charge starts the startup treatment circuit of processing, handles with the startup of being undertaken by this startup treatment circuit and exports the signal transmission treatment circuit that signal specific is handled.
4. pick-up unit according to claim 3 is characterized in that it is arranged on the theft-proof sensor, and the processing that above-mentioned startup treatment circuit is carried out comprises that generation is used for determining the identification code of this theft-proof sensor position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007178218A JP2009015683A (en) | 2007-07-06 | 2007-07-06 | Detector |
| JP178218/2007 | 2007-07-06 | ||
| PCT/JP2008/059876 WO2009008228A1 (en) | 2007-07-06 | 2008-05-29 | Detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102016941A true CN102016941A (en) | 2011-04-13 |
| CN102016941B CN102016941B (en) | 2013-05-01 |
Family
ID=40228408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880023442.0A Expired - Fee Related CN102016941B (en) | 2007-07-06 | 2008-05-29 | Detection device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2009015683A (en) |
| CN (1) | CN102016941B (en) |
| WO (1) | WO2009008228A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152069A (en) * | 2013-02-04 | 2013-06-12 | 北京纽曼腾飞科技有限公司 | Vehicle-mounted cellphone hydraulic servomotor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10090885B2 (en) * | 2011-04-13 | 2018-10-02 | Qualcomm Incorporated | Antenna alignment and vehicle guidance for wireless charging of electric vehicles |
| CN102426766A (en) * | 2011-11-24 | 2012-04-25 | 上海大亚科技有限公司 | Wireless door magnetic device with low power consumption and method for controlling wireless door magnetic alarm |
| JP6493882B2 (en) * | 2013-07-02 | 2019-04-03 | ニッコーシ株式会社 | Electromagnetic sensing device and electromagnetic sensing method |
| JP5802297B2 (en) * | 2014-03-24 | 2015-10-28 | ヒロセ電機株式会社 | Motion detection device |
| WO2021200361A1 (en) * | 2020-04-01 | 2021-10-07 | 三菱電機株式会社 | Power generation element, magnetic sensor using same, encoder, and motor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146059A (en) * | 1991-11-20 | 1993-06-11 | Mita Ind Co Ltd | Overvoltage detecting circuit |
| SE508322C2 (en) * | 1994-02-07 | 1998-09-28 | Leif Aasbrink | Alarm element |
| JPH09212761A (en) * | 1996-01-30 | 1997-08-15 | Alps Electric Co Ltd | Device to be monitored and monitor device |
| US6072383A (en) * | 1998-11-04 | 2000-06-06 | Checkpoint Systems, Inc. | RFID tag having parallel resonant circuit for magnetically decoupling tag from its environment |
| EA006332B1 (en) * | 2002-04-08 | 2005-12-29 | Адель Оде Сайег | Article surveillance tag having a metal clip |
| JP2004206378A (en) * | 2002-12-25 | 2004-07-22 | Nhk Spring Co Ltd | Magnetic marker and article monitoring device using it |
| CN100481142C (en) * | 2004-04-28 | 2009-04-22 | 关卡系统股份有限公司 | Electronic article tracking system for retail rack using loop antenna |
| JP4385867B2 (en) * | 2004-06-25 | 2009-12-16 | パナソニック電工株式会社 | Position detection system and floor panel used in the system |
| JP2007107971A (en) * | 2005-10-12 | 2007-04-26 | Takamisawa Cybernetics Co Ltd | Magnetic sensor device |
-
2007
- 2007-07-06 JP JP2007178218A patent/JP2009015683A/en active Pending
-
2008
- 2008-05-29 CN CN200880023442.0A patent/CN102016941B/en not_active Expired - Fee Related
- 2008-05-29 WO PCT/JP2008/059876 patent/WO2009008228A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152069A (en) * | 2013-02-04 | 2013-06-12 | 北京纽曼腾飞科技有限公司 | Vehicle-mounted cellphone hydraulic servomotor |
| CN103152069B (en) * | 2013-02-04 | 2015-10-21 | 北京纽曼腾飞科技有限公司 | A kind of vehicle carried mobile phone servomotor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102016941B (en) | 2013-05-01 |
| WO2009008228A1 (en) | 2009-01-15 |
| JP2009015683A (en) | 2009-01-22 |
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