CN101078772A - Mobile terminal and method for measurement utilizing same - Google Patents
Mobile terminal and method for measurement utilizing same Download PDFInfo
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- CN101078772A CN101078772A CN 200710130190 CN200710130190A CN101078772A CN 101078772 A CN101078772 A CN 101078772A CN 200710130190 CN200710130190 CN 200710130190 CN 200710130190 A CN200710130190 A CN 200710130190A CN 101078772 A CN101078772 A CN 101078772A
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Abstract
The invention discloses a mobile terminal and the measuring method by using the mobile terminal, belonging to mobile terminal and measuring method. The mobile terminal comprises laser emitter, laser receiver, timing unit and application processing unit. The measuring method comprises emitting and receiving measuring signal; recording the time when measuring signal moves from the mobile terminal to measured object to and fro; and calculating the distance between the mobile terminal and the measured object. The method for measuring the distance between two ends comprises confirming two ends on the measured object; calculating the distance between the mobile terminal and two ends on the measured object; calculating the angle between connection lines of the mobile terminal and two ends on the measured object; and calculating the distance between two ends on the measured object. User can only take the mobile terminal to measure the distance between the mobile terminal and the measured object. The use is very convenient.
Description
Technical field
The present invention relates to a kind of portable terminal, relate in particular to a kind of method that has the portable terminal of measurement function and utilize portable terminal to measure.
Background technology
People not only rest on visually the notion of object now, but want to understand little matchbox, USB flash disk, the camera of arriving of each parameter, these objects of object, arrive house, bridge etc. greatly.Such as seeing exquisite furniture as the consumer, the size of wondering it of just can't help looks at whether to meet oneself needs, and this utilizes survey instrument at hand to measure with regard to needing him.
Survey instrument in the market has a lot, ruler for example, tape measure, set square, vernier caliper, and scale, airborne laser range finder etc.
The method of range finding has a variety of, for example utilizes the acoustic signals mensuration, the direct method of measurement etc., and wherein laser ranging is one of normal distance-finding method that adopts.Laser ranging is the method that adopts laser signal to carry out range observation, and existing laser distance measurement method comprises single laser pulse mensuration, laser modulation signal phase-detection method etc.
(1) single laser pulse measurement ratio juris is, emission laser signal (single laser pulse signal), and this laser signal shines the object back reflection and returns; Measure the two-way time of laser signal; According to the aerial constant speed of light, calculate distance to be measured again.
If light is propagated in air with speed c, be t at A to be measured, B point-to-point transmission round trip required time, then the distance D of A, B point-to-point transmission can be represented with following:
D＝ct/2
In the formula: D is the distance of measurement point A, B point-to-point transmission;
C is the speed that light is propagated in atmosphere;
T is that laser pulse signal comes and goes the once required time of A, B.
(2) laser modulation signal phase-detection ratio juris is, utilizes the frequency of radio wave band, and laser beam is carried out amplitude modulation(PAM) and measure light modulated coming and going the phase delay that measurement point and measured object are once produced.According to the modulation light wavelength, converse the distance of this phase delay representative again.Just determine laser and come and go the required time of measured object, come and go the middle phase change that produces by the Laser Measurement bundle again, converse the distance of measured object with indirect method.
But survey instrument such as ruler, tape measure, except the range measured is little, more since the restriction of itself be unfavorable for carrying; And scale or airborne laser range finder, though range can be satisfied the demand, their volume is big, thereby has caused the inconvenient problem of carrying again.
Summary of the invention
Embodiments of the invention provide a kind of method that has the portable terminal of laser ranging function and utilize portable terminal to measure at above-mentioned deficiency.
The embodiments of the invention portable terminal, by the following technical solutions:
A kind of portable terminal comprises:
Generating laser is arranged at the end of portable terminal; Described generating laser comprises the lens that are positioned at the portable terminal end surface, is arranged at the laser diode of portable terminal inside, and described lens are connected through optical fiber with laser diode; Described laser diode emitted laser signal imports lens by optical fiber, is transmitted on the measured object;
Laser pickoff is arranged side by side end in portable terminal with described generating laser; Described laser pickoff comprises the lens that are positioned at the portable terminal end surface, is arranged at the laser sensor of portable terminal inside, and described lens are connected through optical fiber with laser sensor; By measured object laser light reflected signal, via lens, import optical fiber, be incorporated on the laser sensor;
Timing unit, the timing unit that is connected with laser pickoff with described generating laser respectively is used to write down measuring-signal and comes and goes time between portable terminal and the measured object;
Use processing unit, be connected, be used for calculating the distance of portable terminal to measured object according to the time between round portable terminal of measuring-signal and the measured object with described timing unit.
The method that embodiments of the invention utilize portable terminal to find range, by the following technical solutions:
The generating laser of portable terminal is launched laser signal to measured object;
The laser pickoff of portable terminal receives the measuring-signal that is returned by measured object;
The timing unit record measuring-signal of portable terminal comes and goes the time between portable terminal and the measured object;
The application processing unit of portable terminal calculates the distance between portable terminal and the measured object.
The portable terminal of embodiments of the invention and the method for utilizing portable terminal to find range, because timing unit is integrated in the portable terminal, therefore, the user is when measuring, only need carry described portable terminal with distance measurement function can measure the distance of portable terminal to measured object, and do not need to carry respectively portable terminal and measurement mechanism, therefore use very convenient.
Embodiments of the invention are a kind of to utilize the method for the distance between the end points that portable terminal measures regular measured object frontal plane of projection border, by the following technical solutions:
A kind of method of utilizing the distance between the end points that portable terminal measures regular measured object frontal plane of projection border comprises:
The camera of portable terminal is taken the image information of measured object;
The application processing unit of portable terminal is determined two end points on measured object border on the measured object image;
The generating laser of portable terminal is respectively to described two end points emission measurement signals;
The laser pickoff of portable terminal receives respectively by described two measuring-signals that end points returns;
The timing unit of portable terminal writes down the time that measuring-signal comes and goes portable terminal and described two end points respectively;
The application processing unit of portable terminal calculates the distance of portable terminal to described two end points respectively, and the angle between portable terminal and described two the end points lines;
The application processing unit of portable terminal calculates the distance between described two end points.
Embodiments of the invention are described to utilize the method for the distance between the end points that portable terminal measures regular measured object frontal plane of projection border, owing to measure the distance of two end points of portable terminal, and the angle between the line of portable terminal and two end points, thereby can calculate distance between borderline two end points of measured object easily.
Description of drawings
Fig. 1 is the structural drawing of the embodiment of portable terminal of the present invention;
Fig. 2 is the structural drawing that portable terminal shown in Figure 1 has increased the embodiment behind the display unit;
Fig. 3 is the structural drawing that portable terminal shown in Figure 2 has increased the embodiment behind the camera.
Fig. 4 is the synoptic diagram that the application processing unit of embodiments of the invention portable terminal is measured the angle between the line of two-end-point on the border of portable terminal and regular measured object frontal plane of projection;
Fig. 5 is the process flow diagram that the embodiment of the invention is utilized the method that portable terminal measures;
Fig. 6 is that the embodiment of the invention utilizes portable terminal to measure the process flow diagram of the method for the distance between the end points on regular measured object border.
Embodiment
Below in conjunction with the drawings and specific embodiments embodiments of the invention are described in further detail.
The portable terminal of embodiments of the invention comprises mobile phone, personal digital assistant etc.Be that example describes below with the mobile phone.
As shown in Figure 1, the embodiments of the invention mobile phone comprises: the generating laser that is arranged on mobile phone one end, be arranged side by side in the laser pickoff of mobile phone one end with described generating laser, the timing unit that is connected with laser pickoff with described generating laser, and the application processing unit that is connected with described timing unit respectively.
Wherein, described generating laser comprises: be positioned at the lens 3 of mobile phone end surface, and the laser diode 1 that extends to the mobile phone internal direction, described lens are connected through optical fiber 2 with laser diode.Described laser pickoff comprises: be positioned at the lens 4 of mobile phone end surface, and the laser sensor 6 that extends to the mobile phone internal direction, described lens are connected through optical fiber 5 with laser sensor.
Described laser diode 1 emitted laser signal imports lens 3 by optical fiber 2, is transmitted on the measured object; Laser pickoff will be by measured object laser light reflected signal, via lens 4, imports optical fiber 5, is incorporated on the laser sensor 6; Timing unit record measuring-signal comes and goes the time between mobile phone and the measured object, and this time sent to the application processing unit, by using processing unit, utilize foregoing laser distance measurement method to calculate the distance of mobile phone to measured object according to the time between round mobile phone of measuring-signal and the measured object.
Described generating laser and laser pickoff can be placed on the head or the tail position of mobile phone, and can be by the control of the selection key on cell phone keyboard generating laser emission laser, for example " # " key, or " * " key or the like.Described timing unit is integrated on the mainboard of mobile phone, and is connected with the application processing unit, receives the instruction of self-application processing unit.In addition, the measuring-signal of timing unit record comes and goes the time between mobile phone and the measured object, and the data bus by mobile phone inside sends to the application processing unit.
Because the data-handling capacity of the chip of mobile phone or personal digital assistant is more and more stronger now, above-mentioned application processing unit can be the application process chip of mobile phone or personal digital assistant.
Utilize the mobile phone of embodiments of the invention, because distance measurement function is integrated in the mobile phone, so the user is when range finding, and only need carry described mobile phone can realize distance measurement function, and do not need to carry respectively mobile phone and distance measuring equipment, in practical operation, use very convenient.
As shown in Figure 2, improved on the basis of embodiment shown in Figure 1, described mobile phone also comprises and uses the display unit that processing unit is connected, is used to show the distance of portable terminal to measured object.Described display unit is the display screen of mobile phone.
Use processing unit and calculating mobile phone after the distance of measured object, demonstrate this distance by the display screen of mobile phone.Therefore, the user can see the distance of measured object to mobile phone easily.
As shown in Figure 3, improved on basis embodiment illustrated in fig. 1, described mobile phone also can be used for measuring the distance between the border two-end-point of regular measured object frontal plane of projection.Described mobile phone also comprises camera comprising generating laser, laser pickoff, timing unit and using on the basis of processing unit, is used to take the image of measured object.
With the distance of measuring regular measured object frontal plane of projection two-end-point (B, C) is example, and the process of the distance between the border two-end-point of measuring regular measured object frontal plane of projection is described.
The camera of mobile phone is taken the image of measured object.Use processing unit according to the background environment of setting and the difference value of measured object image, autoscan goes out the border of measured object, and two-end-point B, the C on definite border.
Generating laser is earlier to one of them terminal B emission measurement signal, and laser pickoff receives the measuring-signal that is reflected by this end points, and by the time between the round portable terminal of timing unit record measuring-signal and this end points.At last, by using processing unit, calculate the distance between portable terminal and this end points according to the described time.After the same method, calculate the distance of portable terminal and another end points C.
In order to calculate the distance between the two-end-point, after the distance that calculates between portable terminal to two end points, also need calculate the angle between the line of portable terminal and two end points.Be described in detail its computation process below in conjunction with Fig. 4.
As shown in Figure 4, the camera of mobile phone mainly comprises: lens, image-forming component.Two end points on the border of measured object frontal plane of projection are respectively B and C, and the photocentre of lens is A.The light that the B end points sends is to all the winds propagated, and a light wherein passes the photocentre of lens, does not change the direction of propagation, is imaged as imaging point B ' on image-forming component.In like manner, the light that the C end points sends passes the photocentre of lens, does not change the direction of propagation, is imaged as imaging point C ' on image-forming component.Numerous point on B, the C line through lens incident, at the imaging point line of image-forming component, formed this line segment of B ' C ', and the imaging point on image-forming component of the mid point O correspondence of BC line is the central point D point of image-forming component.After image-forming component senses the light signal of imaging point, convert these light signals to electric signal, and convert analog electrical signal to digital signal by mould/number conversion chip, and at last digital signal is delivered to the application processing unit processes, 2 of BC and line thereof are shown on display screen.
For a mobile phone, the picture that measured object becomes on image-forming component, and its proportionate relationship between the image that shows on the display screen is known, and the lens of mobile phone are known to the distance A D of image-forming component central point.The image of the measured object of taking according to camera utilizes the touch-screen or the writing pencil of mobile phone, determines 2 picture point B1, mid point D1 of C1 line on display screen of B, C, and measures B1, the C1 distance to the mid point D1 of B1C1 line respectively.The picture that utilizes foregoing measured object to become on image-forming component, and the character of its proportionate relationship between the image that shows on the display screen, and the distance between B1D1 and the C1D1 can calculate B ' D on the image-forming component, the distance of C ' D.Can obtain the number of degrees of ∠ C ' AD so according to the merchant's of C ' D and AD arc-tangent value, obtain the number of degrees of ∠ B ' AD according to the merchant's of B ' D and AD arc-tangent value.
Like this, the angle between the line of imaging point B ', the C ' of the photocentre of lens and B, C just can calculate, i.e. θ
3=∠ C ' AD+ ∠ B ' AD.
Angle between the photocentre of lens and B, 2 lines of C again, and the angle between the line of the photocentre of lens and B ', C ' is vertical angle, so the angle between the photocentre of lens and B, 2 lines of C also is the angle =θ between the line of 2 of mobile phone and B, C
3
Use processing unit according to the distance of the portable terminal that has calculated, and the angle between mobile phone and 2 lines of B, C, calculate the distance between B, the C at 2, promptly to B, C
Use the result that processing unit calculates, by the display screen demonstration of mobile phone.
As shown in Figure 5, embodiments of the invention also provide the method for utilizing mobile phone to measure, comprise the steps:
The generating laser of mobile phone is launched laser signal to measured object;
The laser pickoff of mobile phone receives the measuring-signal that is returned by measured object;
The timing unit record measuring-signal of mobile phone comes and goes the time between mobile phone and the measured object;
The application processing unit of mobile phone calculates the distance between mobile phone and the measured object;
The display unit of mobile phone shows the distance between mobile phone and the measured object.
Utilization has the mobile phone of distance measurement function, does not need to carry respectively mobile phone and distance measuring equipment, just can measure the distance of mobile phone to measured object easily, and utilizes the data-handling capacity and the display capabilities of mobile phone, the output measurement result.
As shown in Figure 6, embodiments of the invention also provide the method for utilizing the distance between the borderline end points of mobile phone for measuring rule measured object, comprise the steps:
The camera of mobile phone is taken the image information of measured object;
The application processing unit of mobile phone is determined two end points on measured object border on the measured object image;
The generating laser of mobile phone is respectively to described two end points emission measurement signals;
The laser pickoff of mobile phone receives respectively by described two measuring-signals that end points returns;
The timing unit of mobile phone writes down the time that measuring-signal comes and goes mobile phone and described two end points respectively;
The application processing unit of mobile phone calculates the distance of mobile phone to described two end points respectively, and the angle between mobile phone and described two the end points lines;
The application processing unit of mobile phone calculates the distance between described two end points.
Wherein, calculate the process of the distance between described two end points among the embodiment of this method, and utilize in the distance between the border two-end-point of mobile phone for measuring rule measured object frontal plane of projection used method identical, do not repeat them here.
Certainly; embodiments of the invention also can have a variety of; under the situation that does not deviate from embodiments of the invention spirit and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to embodiments of the invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of embodiments of the invention.
Claims (10)
1, a kind of portable terminal is characterized in that comprising:
Generating laser is arranged at the end of portable terminal; Described generating laser comprises the lens that are positioned at the portable terminal end surface, is arranged at the laser diode of portable terminal inside, and described lens are connected through optical fiber with laser diode; Described laser diode emitted laser signal imports lens by optical fiber, is transmitted on the measured object;
Laser pickoff is arranged side by side end in portable terminal with described generating laser; Described laser pickoff comprises the lens that are positioned at the portable terminal end surface, is arranged at the laser sensor of portable terminal inside, and described lens are connected through optical fiber with laser sensor; By measured object laser light reflected signal, via lens, import optical fiber, be incorporated on the laser sensor;
Timing unit is connected with laser pickoff with described generating laser respectively, is used to write down the time between round portable terminal of measuring-signal and the measured object;
Use processing unit, be connected, be used for calculating the distance of portable terminal to measured object according to the time between round portable terminal of measuring-signal and the measured object with described timing unit.
2, portable terminal according to claim 1 is characterized in that, also comprises: the display unit with the application processing unit is connected is used to show the distance of portable terminal to measured object.
3, portable terminal according to claim 1 is characterized in that, between two end points measuring regular measured object frontal plane of projection border apart from the time, also comprise:
Camera is connected with described application processing unit, is used to take the image of measured object;
Described application processing unit also is used for determining two end points on measured object border on the image of measured object, and calculates the angle between portable terminal and described two the end points lines, the distance between portable terminal and described two end points; And, calculate the distance between two end points on measured object border according to described angle and distance.
4, a kind of method of utilizing portable terminal to measure is characterized in that comprising:
The generating laser of portable terminal is launched laser signal to measured object;
The laser pickoff of portable terminal receives the measuring-signal that is returned by measured object;
The timing unit record measuring-signal of portable terminal comes and goes the time between portable terminal and the measured object;
The application processing unit of portable terminal calculates the distance between portable terminal and the measured object.
5, the method for utilizing portable terminal to measure according to claim 4 is characterized in that also comprising: the display screen of portable terminal shows the distance between portable terminal and the measured object.
6, a kind of method of utilizing the distance between two end points that portable terminal measures regular measured object frontal plane of projection border is characterized in that comprising:
The camera of portable terminal is taken the image information of measured object;
The application processing unit of portable terminal is determined two end points on measured object border on the measured object image;
The generating laser of portable terminal is respectively to described two end points emission measurement signals;
The laser pickoff of portable terminal receives respectively by described two measuring-signals that end points returns;
The timing unit of portable terminal writes down the time that measuring-signal comes and goes portable terminal and described two end points respectively;
The application processing unit of portable terminal calculates the distance of portable terminal to described two end points respectively, and the angle between portable terminal and described two the end points lines;
The application processing unit of portable terminal calculates the distance between described two end points.
7, the method for utilizing the distance between two end points that portable terminal measures regular measured object border according to claim 6 is characterized in that, also comprises:
The display unit of portable terminal shows the distance between described two end points.
8, the method for utilizing the distance between two end points that portable terminal measures regular measured object frontal plane of projection border according to claim 7, it is characterized in that the angle that the application processing unit of described portable terminal calculates between portable terminal and described two the end points lines is specially:
Determine two picture point of two end points correspondence on the display screen of portable terminal, and the mid point of two picture point lines;
Measure the demonstration length of line on the display screen of portable terminal of two end points, and the picture point of two end points is to the distance of described mid point;
Calculate the imaging point of two end points on the image-forming component of mobile terminal camera respectively, arrive the distance of the central point of image-forming component;
Calculate the line of the cam lens photocentre of portable terminal respectively, and photocentre is to the angle between the line of described central point to described two imaging points;
Calculate the angle between the line of the photocentre of lens of camera of portable terminal and described two imaging points;
Calculate the angle between the line of the optical center of lens of mobile terminal camera and described two end points.
9, the method for utilizing the distance between two end points that portable terminal measures regular measured object frontal plane of projection border according to claim 8 is characterized in that,
The described line that calculates the cam lens photocentre of portable terminal to described two imaging points respectively, and photocentre is specially to the angle between the line of described central point:
Wherein L is the distance of the cam lens photocentre of portable terminal to described central point, L1 is that the cam lens photocentre of portable terminal arrives the distance of one of them end points between the imaging point of described image-forming component, and L2 is that the optical center of lens of mobile terminal camera arrives the distance of another one end points between the imaging point of described image-forming component; θ
1Be the line of the optical center of lens of mobile terminal camera, and described optical center of lens is to the angle between the line of the imaging point of one of them end points to described central point; θ
2Be the line of the optical center of lens of mobile terminal camera, and described photocentre is to the angle of another one end points between the line of the imaging point of described image-forming component to described central point.
10, utilize portable terminal to measure the method for the distance between two end points on regular measured object frontal plane of projection border according to claim 9, it is characterized in that,
The angle that calculates between the line of the photocentre of lens of camera of portable terminal and described two imaging points is specially θ=θ
1+ θ
2
Angle between the line of the described optical center of lens that calculates mobile terminal camera and described two end points is specially:
＝θ。
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101301909A CN100557461C (en) | 2007-07-24 | 2007-07-24 | A kind of portable terminal and the method for utilizing portable terminal to measure |
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| CNB2007101301909A CN100557461C (en) | 2007-07-24 | 2007-07-24 | A kind of portable terminal and the method for utilizing portable terminal to measure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157040A (en) * | 2011-01-18 | 2011-08-17 | 中兴通讯股份有限公司 | Communication device and method thereof of non-contact mobile payment apparatus |
| CN103604413A (en) * | 2013-11-20 | 2014-02-26 | 南昌航空大学 | Space distance measurement method based on intelligent cell phone |
| CN104730533A (en) * | 2015-03-13 | 2015-06-24 | 陈蔼珊 | Mobile terminal, and ranging method and system based on mobile terminal |
| CN105761268A (en) * | 2016-03-14 | 2016-07-13 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN105827280A (en) * | 2016-04-19 | 2016-08-03 | 唐山新质点科技有限公司 | Distance measuring method and device |
| CN106441092A (en) * | 2016-09-05 | 2017-02-22 | 合肥京东方光电科技有限公司 | Size measuring method and mobile terminal |
| CN108613627A (en) * | 2018-04-12 | 2018-10-02 | 湘潭大学 | A kind of mobile phone and its measurement method measuring function with straight length |
| CN109541608A (en) * | 2017-09-22 | 2019-03-29 | 华为技术有限公司 | A kind of electronic equipment and its sound ranging method |
| CN110958335A (en) * | 2019-11-01 | 2020-04-03 | 华为技术有限公司 | Terminal device |
| CN113281769A (en) * | 2021-05-24 | 2021-08-20 | 维沃移动通信有限公司 | Method and device for measuring distance |
| CN113294702A (en) * | 2021-05-20 | 2021-08-24 | 读书郎教育科技有限公司 | Intelligent table lamp capable of measuring length and measuring method |
| CN115143929A (en) * | 2022-03-28 | 2022-10-04 | 南京大学 | Endoscopic range finder based on optical fiber bundle |
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2007
- 2007-07-24 CN CNB2007101301909A patent/CN100557461C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157040A (en) * | 2011-01-18 | 2011-08-17 | 中兴通讯股份有限公司 | Communication device and method thereof of non-contact mobile payment apparatus |
| WO2012097548A1 (en) * | 2011-01-18 | 2012-07-26 | 中兴通讯股份有限公司 | Communication apparatus and method for mobile payment device of non-contact type |
| CN103604413A (en) * | 2013-11-20 | 2014-02-26 | 南昌航空大学 | Space distance measurement method based on intelligent cell phone |
| CN104730533A (en) * | 2015-03-13 | 2015-06-24 | 陈蔼珊 | Mobile terminal, and ranging method and system based on mobile terminal |
| CN105761268A (en) * | 2016-03-14 | 2016-07-13 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN105827280A (en) * | 2016-04-19 | 2016-08-03 | 唐山新质点科技有限公司 | Distance measuring method and device |
| CN106441092A (en) * | 2016-09-05 | 2017-02-22 | 合肥京东方光电科技有限公司 | Size measuring method and mobile terminal |
| CN109541608A (en) * | 2017-09-22 | 2019-03-29 | 华为技术有限公司 | A kind of electronic equipment and its sound ranging method |
| CN109541608B (en) * | 2017-09-22 | 2022-08-26 | 华为技术有限公司 | Electronic equipment and sound wave distance measuring method thereof |
| CN108613627A (en) * | 2018-04-12 | 2018-10-02 | 湘潭大学 | A kind of mobile phone and its measurement method measuring function with straight length |
| CN110958335A (en) * | 2019-11-01 | 2020-04-03 | 华为技术有限公司 | Terminal device |
| CN113294702A (en) * | 2021-05-20 | 2021-08-24 | 读书郎教育科技有限公司 | Intelligent table lamp capable of measuring length and measuring method |
| CN113281769A (en) * | 2021-05-24 | 2021-08-20 | 维沃移动通信有限公司 | Method and device for measuring distance |
| CN115143929A (en) * | 2022-03-28 | 2022-10-04 | 南京大学 | Endoscopic range finder based on optical fiber bundle |
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| Publication number | Publication date |
|---|---|
| CN100557461C (en) | 2009-11-04 |
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