CN203224207U - Magnetic grid ruler precision measurement instrument - Google Patents
Magnetic grid ruler precision measurement instrument Download PDFInfo
- Publication number
- CN203224207U CN203224207U CN 201320244975 CN201320244975U CN203224207U CN 203224207 U CN203224207 U CN 203224207U CN 201320244975 CN201320244975 CN 201320244975 CN 201320244975 U CN201320244975 U CN 201320244975U CN 203224207 U CN203224207 U CN 203224207U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- measuring instrument
- precision measuring
- railings ruler
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model provides a magnetic grid ruler precision measurement instrument. The magnetic grid ruler precision measurement instrument comprises a fixed piece dial, a movable magnetic pole, a signal processing unit and a display unit. The fixed piece dial comprises a plurality of magnetic sensor chips arranged along the length direction of the fixed piece dial, each magnetic sensor chip comprises at least two parallel magnetic induction films and pads, the pads are electrically connected with the magnetic induction films, and the magnetic induction films are connected to form a Wheatstone bridge having an independent output channel; the movable magnetic pole moves along the length direction of the fixed piece dial, the magnetic field that the movable magnetic pole generates can be inducted by the magnetic sensor chip opposite to the position of the movable magnetic pole and a differential signal is output; the signal processing unit is used for acquiring the relative position of the movable magnetic pole on the fixed piece dial according to the differential signal and converting the relative position to the length dimension of a measured device, and the display unit is used for displaying the length dimension of the measured device. The magnetic grid ruler precision measurement instrument is high in integration level and precision, convenient to manufacture, is suitable for batch production, and in addition, is low in cost and convenient to use, and has wide market application prospects.
Description
Technical field
The utility model belongs to the precision measurement field, is specifically related to a kind of magnetic railings ruler precision measuring instrument.
Background technology
The precision measuring instrument of industrial circle employing at present all is mechanically minimum scale to be amplified, to obtain accurate more measured value.As, vernier caliper namely is to utilize vernier that the minimum scale of main scale is amplified, thereby reaches the measuring accuracy of 0.02mm.For another example, micrometer caliper is to utilize the spiral chi that the minimum scale of main scale is amplified, and namely utilizes the spiral chi that air line distance is converted into angular displacement, thereby measuring accuracy is brought up to 0.01mm.
For vernier caliper, want to improve its measuring accuracy, can only increase the vernier lattice number of vernier caliper, yet because main scale and the every lattice of vernier differ the 1/n millimeter, the increase of vernier lattice number can increase parallax, this will increase the difficulty that the user distinguishes vernier.For micrometer caliper, can only improve its degree of accuracy by the minimum scale that dwindles the spiral chi, this can increase the difficulty of use equally.In fact, owing to be subjected to the restriction of mechanical process capacity, this mode of amplifying to improve measuring accuracy by machinery will cause the increase of manufacture difficulty and cost, and performance difficulty, be unsuitable for producing in batches.
The utility model content
The technical problems to be solved in the utility model is exactly at the above-mentioned defective that exists in the precision measuring instrument, and a kind of magnetic railings ruler precision measuring instrument is provided, its measuring accuracy height, and easy to make, cost is low.
For this reason, the utility model provides a kind of magnetic railings ruler precision measuring instrument, comprising:
The stator index dial, it comprises a plurality of magnetic sensor chips of arranging along its length direction, each described magnetic sensor chip comprises at least two inductive magnetic thin films parallel to each other and pad, described pad is electrically connected with described inductive magnetic thin film, and described inductive magnetic thin film connects into the Wheatstone bridge with independent output channel;
Mobile magnetic pole, its length direction along described stator index dial moves, and the magnetic field that described mobile magnetic pole produces can make described magnetic sensor chip induction and the output differential signal relative with its position;
Signal processing unit, it is used for obtaining described mobile magnetic pole at the relative position of described stator index dial according to described differential signal, and converts thereof into the length dimension of measured device;
Display unit, it is used for showing the length dimension of measured device.
Wherein, described magnetic sensor chip is vertically arranged on the length direction of described stator index dial and is arranged.
Wherein, on the length direction of described stator index dial, adjacent two described magnetic sensor chip dislocation are arranged.
Wherein, described inductive magnetic thin film shifts to install at its length direction.
Wherein, described magnetic sensitive film comprises giant magnetoresistance magnetic sensitive film, anisotropic magnetoresistive magnetic sensitive film, tunneling effect magnetic resistance magnetic sensitive film, giant magnetoresistance effect magnetic resistance magnetic sensitive film, Hall effect film or huge Hall effect film.
Wherein, also comprise printed circuit board, the wiring of being located at described printed circuit board is electrically connected with described inductive magnetic thin film by described pad, and described differential signal transfers to described signal processing unit by described printed wiring board.
Wherein, described mobile magnetic pole comprises permanent magnet and shielding case, and described shielding case comprises at least one slit makes described permanent magnet place in the described shielding case, and the magnetic field of described permanent magnet is launched to corresponding magnetic sensitive film by slit.
Wherein, also comprise reset unit, it is used for described signal processing unit is resetted, and the reading of described display unit is made zero.
Wherein, described magnetic railings ruler precision measuring instrument is vernier caliper, and described stator index dial is located at the main scale of described vernier caliper; Described mobile magnetic pole is located on the vernier of described vernier caliper.
Wherein, described magnetic railings ruler precision measuring instrument is micrometer caliper, and a described stator index dial of cover and described mobile magnetic pole are located at micrometric screw and main scale respectively; Simultaneously another set of described stator index dial and described mobile magnetic pole are located at spiral chi and main scale respectively; Perhaps, mobile magnetic pole is located at main scale, two described stator index dials are located at micrometric screw and spiral chi respectively.
The utlity model has following beneficial effect:
The magnetic railings ruler precision measuring instrument that the utility model provides comprises stator index dial and mobile magnetic pole, length direction arrangement at the stator index dial arranges a plurality of magnetic sensor chips unit or a unit that comprises a plurality of magnetic sensor chips, each magnetic sensor chip comprises the Wheatstone bridge that is made of inductive magnetic thin film, mobile magnetic pole moves along the length direction of stator index dial, make the magnetic sensor chip induction output differential signal relative with its position, signal processing unit can determine that according to this differential signal mobile magnetic pole is at the relative position of stator index dial, can obtain mobile magnetic pole in the displacement of stator index dial direction according to this relative position, and then obtain the size of testee; Display unit can show that mobile magnetic pole is in the size of the numerical value of the relative position of stator index dial or demonstration testee.Because the integrated level height of magnetic sensor chip, and be convenient to make, be suitable for generating in batches, can reduce cost of manufacture.And, this magnetic railings ruler precision measuring instrument is the magnetic field of responding to mobile magnetic pole by magnetic sensor chip, reach the size of measuring object under test by the relative displacement of magnetic sensor chip and mobile magnetic pole, the precision height, easy to use, meet modern society to the growth requirement of precision measuring instrument, have market application foreground widely.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment magnetic railings ruler precision measuring instrument;
Fig. 2 is the structural representation of the utility model embodiment stator index dial;
Fig. 3 is the structural representation of the utility model embodiment magnetic sensor chip;
Fig. 4 is the schematic diagram of the utility model embodiment magnetic sensor chip;
Fig. 5 is the structural representation of the applied micrometer caliper of the utility model magnetic railings ruler precision measuring instrument.
Embodiment
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with accompanying drawing the magnetic railings ruler precision measuring instrument that the utility model provides is described in detail.
Fig. 1 is the theory diagram of the utility model embodiment magnetic railings ruler precision measuring instrument.As shown in Figure 1, the magnetic railings ruler precision measuring instrument that provides of present embodiment comprises stator index dial 1, mobile magnetic pole 2, signal processing unit 3 and display unit 4.Stator index dial 1 is provided with magnetic sensor chip, and it exports differential signal under the induction of mobile magnetic pole 2.Signal processing unit 3 is connected with magnetic sensor chip, and its differential signal according to magnetic sensor chip output obtains the length of measured device.Display unit 4 is connected with signal processing unit 3, is used for showing the length of measured device.
Fig. 2 is the structural representation of the utility model embodiment stator index dial.As shown in Figure 2, stator index dial 1 comprises a plurality of magnetic sensor chip C that arrange along its length direction
1, C
2, C
3C
nEach magnetic sensor chip C comprises at least two inductive magnetic thin films parallel to each other, the pinning direction of inductive magnetic thin film can be identical, also can be opposite, and two Wheatstone bridges that inductive magnetic thin films formation has independent output channel, namely each magnetic sensor chip C has an independently output channel.When magnetic sensor chip C is subjected to the induction of external magnetic field, Wheatstone bridge output differential signal.
Particularly, as shown in Figure 3, magnetic sensor chip C comprises two inductive magnetic thin films and three pads, the first pad 12a and the second pad 12b are separately positioned on the end of the first inductive magnetic thin film 11a and the second inductive magnetic thin film 11b, the other end of the first inductive magnetic thin film 11a and the second inductive magnetic thin film 11b is connected the 3rd pad 12c, and namely the 3rd pad 12c is electrically connected the first inductive magnetic thin film 11a and the second inductive magnetic thin film 11b as common port.Utilize three pad 12a, 12b, 12c two inductive magnetic thin film 11a, 11b can be connected into the Hui Sitong half-bridge circuit.
In the present embodiment, magnetic sensitive film can adopt and comprise giant magnetoresistance magnetic sensitive film, anisotropic magnetoresistive magnetic sensitive film, tunneling effect magnetic resistance magnetic sensitive film, giant magnetoresistance effect magnetic resistance magnetic sensitive film, Hall effect film or huge Hall effect film.
The a plurality of magnetic sensor chip C of present embodiment arrange along the length direction of stator index dial.Preferably, at the length direction of stator index dial, magnetic sensor chip is vertically arranged.Need to prove, present embodiment with the length direction of inductive magnetic thin film be defined as magnetic sensor chip laterally, with the Width of inductive magnetic thin film be defined as magnetic sensor chip vertically.That is to say vertically laterally narrow than magnetic sensor chip of magnetic sensor chip.Make the vertical arrangement of magnetic sensor chip can improve the precision of magnetic railings ruler precision measuring instrument.
More preferably, on the length direction of stator index dial, adjacent two magnetic sensor chips shift to install, and reducing the distance between adjacent two magnetic sensor chips, thereby further improve the precision of magnetic railings ruler precision measuring instrument.
In order further to improve the precision of magnetic railings ruler precision measuring instrument, the inductive magnetic thin film that present embodiment will constitute magnetic sensor chip shifts to install at its length direction, to reduce the width of magnetic sensor chip.
In another embodiment, each magnetic sensor chip C comprises a plurality of Wheatstone bridges, and a plurality of Wheatstone bridges are arranged at the length direction of stator index dial.Each Wheatstone bridge has an output channel, and namely each magnetic sensor chip C has the output channel consistent with Wheatstone bridge quantity.The structure of Wheatstone bridge is as indicated above, does not repeat them here.
As shown in Figure 1, mobile magnetic pole 2 comprises permanent magnet.Certainly, permanent magnet also can adopt other parts that can produce magnetic field such as coil to replace.Mobile magnetic pole 2 moves at the length direction of stator index dial 1, and in moving process, makes the position Wheatstone bridge relative with it respond to and export the differential signal of a near sinusoidal ripple.
Preferably, mobile magnetic pole 2 also comprises the shielding case (not shown) that shielding material is made, and at shielding case one or more slit is set.Permanent magnet places in the shielding case, and the magnetic field that permanent magnet produces is passed the slit and made the Wheatstone bridge induction output differential signal relative with its position, and screening can improve measuring accuracy on the one hand; On the other hand, can prevent that external environment condition magnetic field from producing interference to magnetic sensor chip, thereby improve the reliability of magnetic railings ruler precision measuring instrument.
Fig. 4 is the schematic diagram of the utility model embodiment magnetic sensor chip.Among the figure, arrow is represented the pinning direction of inductive magnetic thin film; Horizontal ordinate is represented displacement (μ m), and ordinate is represented voltage (mV).As shown in Figure 4, magnetic sensor chip is acted on by the magnetic field of mobile magnetic pole 2, exports differential signal thereby cause its impedance to change, and this differential signal is a sine wave, the center of adjacent peaks and trough is the symcenter of magnetic sensor chip, i.e. the symcenter of two inductive magnetic thin films.This symcenter is namely as the scale of magnetic sensor chip.When making the magnetic railings ruler precision measuring instrument, be benchmark with the scale of this magnetic sensor chip, magnetic sensor chip is equidistantly arranged at the length direction of stator index dial.
Present embodiment magnetic sensor chip 1 also comprises printed circuit board and capillary, an end of being located at the wiring of printed circuit board is electrically connected with corresponding capillary (not shown), the other end is electrically connected with the corresponding pad (not shown) of being located at magnetic sensor chip 1, namely is electrically connected with the wiring of being located at printed circuit board by the input/output terminal of capillary with magnetic sensor chip 1.The input end of signal processing unit 3 is electrically connected with the wiring of printed circuit board, to receive the differential signal of magnetic sensor chip 1 output, as shown in Figure 1.The differential signal of 3 pairs of magnetic sensor chip outputs of signal processing unit is handled, and obtains mobile magnetic pole 2 at the relative position of stator index dial.
Present embodiment magnetic railings ruler precision measuring instrument can also comprise reset unit, is used for signal processing unit 3 and resets, and the reading of display unit 4 is made zero.It is more flexible that reset unit makes that the magnetic railings ruler precision measuring instrument uses.For example, if will carrying out multistage to testee, the user measures, after measuring primary importance, as long as utilize reset unit that signal processing unit 3 is resetted and display unit 4 makes zero, then mobile magnetic pole 2 is moved to second measuring position, the reading of display unit 4 namely is the distance between primary importance and the second place at this moment.
Present embodiment magnetic railings ruler precision measuring instrument can be applied to vernier caliper,, the stator index dial is located at the main scale of vernier caliper that is, mobile magnetic pole is located at the vernier of vernier caliper.
Present embodiment magnetic railings ruler precision measuring instrument can also be applied to micrometer caliper, as shown in Figure 5, a cover stator index dial and mobile magnetic pole is located at micrometric screw 101 and main scale 102 respectively, to obtain the size of main scale; Simultaneously another set of stator index dial and mobile magnetic pole are located at spiral chi 103 and main scale 102 respectively, to obtain the size of spiral chi.Perhaps, mobile magnetic pole is located at main scale 102, two stator index dials are located at micrometric screw 101 and spiral chi 103 respectively, namely utilize a mobile magnetic pole to respond to the magnetic sensor chip of being located at micrometric screw 101 and spiral chi 103 respectively, thereby obtain the size of measured device.
Certainly, the utility model magnetic railings ruler also can be applied to other displacement measuring instrument or dimensional measurement instrument, can obtain same technique effect.
The magnetic railings ruler precision measuring instrument that present embodiment provides comprises stator index dial and mobile magnetic pole, length direction arrangement at the stator index dial arranges a plurality of magnetic sensor chips, each magnetic sensor chip comprises the Wheatstone bridge that is made of inductive magnetic thin film, when mobile magnetic pole moves along the length direction of stator index dial, can make the magnetic sensor chip induction output differential signal relative with its position, signal processing unit can determine that according to this differential signal mobile magnetic pole is at the relative position of stator index dial, can obtain mobile magnetic pole in the displacement of stator index dial direction according to this relative position, and then obtain the size of testee; Display unit can show that mobile magnetic pole is in the size of the numerical value of the relative position of stator index dial or demonstration testee.Because the integrated level height of magnetic sensor chip, and be convenient to make, be suitable for generating in batches, can reduce cost of manufacture.And, this magnetic railings ruler precision measuring instrument is the magnetic field of responding to mobile magnetic pole by magnetic sensor chip, and the relative position by mobile magnetic pole and magnetic sensor chip obtains the size of testee, easy to use, meet modern society to the growth requirement of precision measuring instrument, have market application foreground widely.
Be understandable that above embodiment only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection domain of the present utility model.
Claims (10)
1. a magnetic railings ruler precision measuring instrument is characterized in that, comprising:
The stator index dial, it comprises a plurality of magnetic sensor chips of arranging along its length direction, each described magnetic sensor chip comprises at least two inductive magnetic thin films parallel to each other and pad, described pad is electrically connected with described inductive magnetic thin film, and described inductive magnetic thin film connects into the Wheatstone bridge with independent output channel;
Mobile magnetic pole, its length direction along described stator index dial moves, and the magnetic field that described mobile magnetic pole produces can make described magnetic sensor chip induction and the output differential signal relative with its position;
Signal processing unit, it is used for obtaining described mobile magnetic pole at the relative position of described stator index dial according to described differential signal, and converts thereof into the length dimension of measured device;
Display unit, it is used for showing the length dimension of measured device.
2. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, described magnetic sensor chip is vertically arranged on the length direction of described stator index dial and arranged.
3. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, on the length direction of described stator index dial, adjacent two described magnetic sensor chip dislocation are arranged.
4. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, described inductive magnetic thin film shifts to install at its length direction.
5. magnetic railings ruler precision measuring instrument according to claim 1, it is characterized in that described magnetic sensitive film comprises giant magnetoresistance magnetic sensitive film, anisotropic magnetoresistive magnetic sensitive film, tunneling effect magnetic resistance magnetic sensitive film, giant magnetoresistance effect magnetic resistance magnetic sensitive film, Hall effect film or huge Hall effect film.
6. magnetic railings ruler precision measuring instrument according to claim 1, it is characterized in that, comprise printed circuit board, the wiring of being located at described printed circuit board is electrically connected with described inductive magnetic thin film by described pad, and described differential signal transfers to described signal processing unit by described printed wiring board.
7. magnetic railings ruler precision measuring instrument according to claim 1, it is characterized in that, described mobile magnetic pole comprises permanent magnet and shielding case, described shielding case comprises at least one slit makes described permanent magnet place in the described shielding case, and the magnetic field of described permanent magnet is launched to corresponding magnetic sensitive film by slit.
8. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, comprises reset unit, and it is used for described signal processing unit is resetted, and the reading of described display unit is made zero.
9. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, described magnetic railings ruler precision measuring instrument is vernier caliper, and described stator index dial is located at the main scale of described vernier caliper; Described mobile magnetic pole is located on the vernier of described vernier caliper.
10. magnetic railings ruler precision measuring instrument according to claim 1 is characterized in that, described magnetic railings ruler precision measuring instrument is micrometer caliper, and a described stator index dial of cover and described mobile magnetic pole are located at micrometric screw and main scale respectively; Simultaneously another set of described stator index dial and described mobile magnetic pole are located at spiral chi and main scale respectively; Perhaps, mobile magnetic pole is located at main scale, two described stator index dials are located at micrometric screw and spiral chi respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320244975 CN203224207U (en) | 2013-05-08 | 2013-05-08 | Magnetic grid ruler precision measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320244975 CN203224207U (en) | 2013-05-08 | 2013-05-08 | Magnetic grid ruler precision measurement instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224207U true CN203224207U (en) | 2013-10-02 |
Family
ID=49251210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320244975 Expired - Lifetime CN203224207U (en) | 2013-05-08 | 2013-05-08 | Magnetic grid ruler precision measurement instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203224207U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132609A (en) * | 2014-07-16 | 2014-11-05 | 广东工业大学 | Electromagnetic grid ruler structure and displacement information reading method thereof |
| CN104142115A (en) * | 2013-05-08 | 2014-11-12 | 北京嘉岳同乐极电子有限公司 | Magnetic grating ruler precise measuring instrument |
| CN104515464A (en) * | 2013-10-03 | 2015-04-15 | 上海球栅测量***有限公司 | Displacement measurement system and displacement measurement device |
| CN104515463A (en) * | 2013-10-03 | 2015-04-15 | 上海雷尼威尔技术有限公司 | Displacement measurement system and displacement measurement device |
| CN104533385A (en) * | 2014-12-22 | 2015-04-22 | 遵义宏建机电设备有限公司 | Control system of rotary drilling rig |
-
2013
- 2013-05-08 CN CN 201320244975 patent/CN203224207U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142115A (en) * | 2013-05-08 | 2014-11-12 | 北京嘉岳同乐极电子有限公司 | Magnetic grating ruler precise measuring instrument |
| CN104515464A (en) * | 2013-10-03 | 2015-04-15 | 上海球栅测量***有限公司 | Displacement measurement system and displacement measurement device |
| CN104515463A (en) * | 2013-10-03 | 2015-04-15 | 上海雷尼威尔技术有限公司 | Displacement measurement system and displacement measurement device |
| CN104132609A (en) * | 2014-07-16 | 2014-11-05 | 广东工业大学 | Electromagnetic grid ruler structure and displacement information reading method thereof |
| CN104132609B (en) * | 2014-07-16 | 2017-07-07 | 广东工业大学 | A kind of electric magnetic railings ruler structure and its displacement information read method |
| CN104533385A (en) * | 2014-12-22 | 2015-04-22 | 遵义宏建机电设备有限公司 | Control system of rotary drilling rig |
| CN104533385B (en) * | 2014-12-22 | 2017-10-27 | 遵义宏建机电设备有限公司 | A kind of rotary drilling rig control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203224207U (en) | Magnetic grid ruler precision measurement instrument | |
| CN102169133B (en) | Current measurement device | |
| CN103389479B (en) | The dynamic-range sensor improved | |
| CN103901363A (en) | Single-chip Z-axis linear magneto-resistive sensor | |
| CN105547126A (en) | Eddy current displacement sensor | |
| CN205537488U (en) | Eddy current displacement sensor | |
| CN203480009U (en) | Single-chip Z-axis linear magneto-resistor sensor | |
| CN103454597A (en) | Current-induction measuring device and method and sensitivity adjusting method | |
| CN103235189A (en) | High-precision micro resistor measurement method based on double-current voltage ratio method and measurement system for realizing method | |
| CN112363097B (en) | Magneto-resistance sensor chip | |
| CN101008580A (en) | Resistance type wave height gauge | |
| CN205139762U (en) | Linear difference hall voltage generator of tiling structure | |
| CN201463826U (en) | Magnetic array position sensing device | |
| CN202033405U (en) | Current measuring device | |
| CN205246739U (en) | Current sensor | |
| CN104142115A (en) | Magnetic grating ruler precise measuring instrument | |
| CN108917587A (en) | A kind of resistance-strain type curvature sensor based on favour stone full-bridge principle | |
| CN205228499U (en) | Measurement device for be used for current vortex sensor | |
| CN112161560B (en) | Displacement sensing device and method based on permanent magnet flux measurement | |
| CN210833407U (en) | Curvature sensing system | |
| CN203981183U (en) | A kind of gear sensor | |
| CN203191103U (en) | Environment analog quantity acquisition module | |
| JPWO2017077871A1 (en) | Magnetic sensor | |
| CN201141760Y (en) | Multi-core inductance sensor for detecting displacement | |
| CN204555921U (en) | A kind of photo-electric type linear displacement transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |
|
| CX01 | Expiry of patent term |