1. The electronic processing method of the bill document is characterized in that: comprises the following steps;

s1, scanning, namely scanning the paper bill document in a framing manner by using image scanning equipment to generate an initial digital image;

s2, naming the initial digital image obtained in S1;

s3, processing the named initial digital image obtained in S2;

a) splicing, namely splicing a plurality of digital images formed by scanning the frames to form a complete image so as to ensure the integrity of the digital image of the paper file;

b) rotating and correcting, namely, rotating and restoring the digital image which does not accord with the reading direction, and correcting the image which is deviated to achieve the visual orthographic view of the image;

c) cutting edges, cutting the digital image, and cutting the image at the position 2-3 mm away from the most extension of the margin;

d) decontaminating, decontaminating the digital image to remove the stains, dirty lines and black edges generated in the scanning process to remove the impurities which affect the image quality, following the principle of showing the original appearance of the file, and not removing the original paper fading spots, water stains, stains and binding hole traces of the file page in the processing process;

s4, checking the image quality, namely checking the digital image obtained in the S3;

e) rescanning when the digital image is incomplete, cannot be clearly identified or has high image distortion;

f) the conditions of missed scan, repeated scan, multiple scan, etc. should be corrected in time.

g) And when the arrangement sequence of the digital images is inconsistent with the original file, adjusting.

h) Checking the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions, and performing image processing again when the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions are found not to meet the image quality requirement;

s5, naming the finished product image, and naming the finished product digital image obtained in S4;

and S6, storing the images, and storing the finished product images obtained in the S5 in a database.

2. The electronic processing method for bill documents according to claim 1, wherein the image scanning device comprises a base, a bill placing groove is provided at an upper end of the base, a negative pressure chamber is provided inside the base, negative pressure suction holes are uniformly provided in the negative pressure chamber and the bill placing groove, a mounting groove is provided on a side wall of the base, an air exhaust channel is provided between the mounting groove and the negative pressure chamber, a negative pressure machine is provided inside the mounting groove, an air inlet end of the negative pressure machine extends into the air exhaust channel, an upper housing is movably provided at an upper end of the base, a scanning camera is provided inside the upper housing, and vent holes are uniformly provided on an upper side wall of the upper housing.

3. The electronic processing method for the bill documents according to claim 2, wherein a lifting electric telescopic rod is arranged at the upper end of the base, a lifting plate is arranged at one end of the upper shell, the driving end of the lifting electric telescopic rod is fixedly connected with the lifting plate, stabilizing polished rods are symmetrically and movably installed on the lifting plate and positioned at two sides of the lifting electric telescopic rod in a penetrating manner, and the lower ends of the stabilizing polished rods are fixedly connected with the base.

4. The electronic processing method for bill documents according to claim 2, wherein the scanning camera is fixedly arranged at the lower end of the positioning plate, the upper end of the upper shell is provided with a positioning screw, the positioning screw is movably sleeved with a positioning plate, the positioning screw is provided with an internal thread sleeve in threaded connection with the upper side and the lower side of the positioning plate, the upper side wall of the upper shell is symmetrically provided with a positioning polished rod in a penetrating and movable manner, the lower end of the positioning polished rod is fixedly connected with the positioning plate, and the upper end of the positioning polished rod is fixedly connected with the positioning plate.

5. The electronic processing method for bill documents according to claim 4, wherein the end surface of the internal thread sleeve near the positioning plate is uniformly provided with ball rolling grooves, and the ball rolling grooves are embedded with rolling balls movably.

6. The electronic processing method for the bill documents according to claim 2, wherein the negative pressure suction holes comprise a large hole, a small hole and a taper hole, the large hole is connected with the small hole through the taper hole, an air-through net is arranged inside the large hole, a stand column is arranged at the upper end of the air-through net, a movable block groove is formed in the upper end of the stand column, a movable block is movably arranged inside the movable block groove, a spring is arranged between the lower end of the movable block and the bottom of the movable block groove, vent grooves are uniformly formed in the side wall of the stand column and are communicated with the movable block groove, a piston rod is arranged at the upper end of the piston, and a blocking ball is arranged at the upper end of the piston rod.

7. The electronic processing method for bill documents according to claim 6, wherein the diameter of the blocking ball is smaller than that of the large hole, and the diameter of the blocking ball is larger than that of the small hole.

8. The electronic processing method for bill documents according to claim 2, wherein an upper housing receiving groove is formed at the upper end of the base and outside the bill placing groove.

9. The electronic processing method for bill documents according to any one of claims 2 to 8, wherein the scanning camera is a color industrial camera.

Background

The concept of a bill can be divided into broad and narrow meanings. The bill in a broad sense includes various securities and vouchers, such as stocks, enterprise bonds, invoices, bills of lading and the like; the bill in the narrow sense, that is, the "bill" specified in "bill law" of our country, including draft, bankbook and check, means a valuable paper issued by a drawer, promised to pay a certain amount unconditionally to a payee or a bearer at the time of seeing a bill or on a specified date. Most of the existing bills are paper bills, and the operations of inquiring, managing and the like of the bills are unchanged. Therefore, an electronic processing method for the bill document is provided.

Disclosure of Invention

The invention aims to provide an electronic processing method for bill documents, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the electronic processing method of the bill document comprises the following steps;

s1, scanning, namely scanning the paper bill document in a framing manner by using image scanning equipment to generate an initial digital image;

s2, naming the initial digital image obtained in S1;

s3, processing the named initial digital image obtained in S2;

a) splicing, namely splicing a plurality of digital images formed by scanning the frames to form a complete image so as to ensure the integrity of the digital image of the paper file;

b) rotating and correcting, namely, rotating and restoring the digital image which does not accord with the reading direction, and correcting the image which is deviated to achieve the visual orthographic view of the image;

c) cutting edges, cutting the digital image, and cutting the image at the position 2-3 mm away from the most extension of the margin;

d) decontaminating, decontaminating the digital image to remove the stains and the impurities which affect the image quality of the black edges of the stain lines generated in the scanning process, following the principle of showing the original appearance of the file, and not removing the original paper fading spots, water stains, stains and binding hole traces of the file page in the processing process;

s4, checking the image quality, namely checking the digital image obtained in the S3;

e) rescanning when the digital image is incomplete, cannot be clearly identified or has high image distortion;

f) the conditions of missed scan, repeated scan, multiple scan, etc. should be corrected in time.

g) And when the arrangement sequence of the digital images is inconsistent with the original file, adjusting.

h) Checking the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions, and performing image processing again when the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions are found not to meet the image quality requirement;

s5, naming the finished product image, and naming the finished product digital image obtained in S4;

and S6, storing the images, and storing the finished product images obtained in the S5 in a database.

Further, image scanning equipment includes the base, the bill standing groove has been seted up to the upper end of base, the negative pressure chamber has been seted up to the inside of base, the negative pressure suction hole has evenly been seted up with the bill standing groove in the negative pressure chamber, the mounting groove has been seted up on the lateral wall of base, bleed passage has been seted up between mounting groove and the negative pressure chamber, the inside of mounting groove is equipped with the negative pressure machine, the inlet end of negative pressure machine stretches into bleed passage, the upper end activity of base is provided with the epitheca, the inside of epitheca is equipped with scanning camera, the air vent has evenly been seted up to the upper side wall of epitheca.

Further, the upper end of base is equipped with lifting electric telescopic handle, the one end of epitheca is equipped with lifts the board, lifting electric telescopic handle's drive end links to each other with the lifting board is fixed, it has stable polished rod to lift on the board and lie in lifting electric telescopic handle's bilateral symmetry and run through movable mounting, the lower extreme of stabilizing the polished rod all links to each other with the fixed of base.

Further, the scanning camera is fixedly arranged at the lower end of the positioning plate, a positioning screw rod is arranged at the upper end of the upper shell, a positioning plate is movably mounted on the positioning screw rod in a sleeved mode, internal thread sleeves are connected to the upper side and the lower side of the positioning plate in a threaded mode, the upper side wall of the upper shell is symmetrically penetrated through and movably mounted with a positioning polished rod, the lower end of the positioning polished rod is fixedly connected with the positioning plate, and the upper end of the positioning polished rod is fixedly connected with the positioning plate.

Furthermore, the end face of the internal thread sleeve, which is close to one side of the positioning plate, is uniformly provided with a rolling ball groove, and a rolling ball is embedded in the rolling ball groove and movably mounted.

Further, the negative pressure suction hole includes macropore, aperture and taper hole, link to each other through the taper hole between macropore and the aperture, macroporous inside is equipped with the net of ventilating, the upper end of the net of ventilating is equipped with the stand, the movable block groove has been seted up to the upper end of stand, the inside movable mounting in movable block groove has the movable block, be equipped with the spring between the lower extreme of movable block and the tank bottom in movable block groove, the air channel has evenly been seted up on the lateral wall of stand, the air channel all communicates with the movable block groove, the upper end of piston is equipped with the piston rod, the upper end of piston rod is equipped with the shutoff ball.

Further, the diameter of the blocking ball is smaller than that of the large hole, and the diameter of the blocking ball is larger than that of the small hole.

Further, the upper shell holding tank has been seted up to the upper end of base and the outside that is located the bill standing groove.

Further, the scanning camera is a color industrial camera.

Compared with the prior art, the invention has the beneficial effects that: the arrangement of the bill placing groove, the negative pressure cavity, the negative pressure air suction hole, the mounting groove, the air suction channel and the negative pressure machine in a matched manner can enable air circulation to be generated in the bill placing groove, wrinkles of bills placed in the bill placing groove can be unfolded and the positions of the bills can be fixed through the air circulation, and the shooting effect of a scanning camera on the bills is improved; through the matched arrangement of the lifting electric telescopic rod, the lifting plate and the stable polished rod, the phenomenon that the lifting plate and the upper shell shake in the movement process can be avoided, the combination and the separation of the upper shell and the base can be controlled electrically, the operation is convenient, and the physical strength is saved; through the matching arrangement of the positioning plate, the positioning screw rod, the positioning plate, the internal thread sleeve and the positioning polished rod, the height position of the positioning plate in the upper shell can be changed, and the height position of the scanning camera in the upper shell can be changed; through the cooperation setting of ball groove and rolling ball, when the internal thread cover produced the extrusion location effect to the locating plate, the rolling ball can make and produce rolling friction between the two, reduces to twist and revolves the resistance that the internal thread cover received. The invention can arrange paper bill documents into electronic data, thereby facilitating the follow-up inquiry and management operation of bills.

Drawings

FIG. 1 is a schematic flow diagram of the process of the present invention;

FIG. 2 is a schematic diagram of a front view of a scanning device according to the present invention;

FIG. 3 is a schematic view of a main plane structure of the scanning device of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is an enlarged view of the portion B of FIG. 3;

in the figure: 1-base, 2-bill placing groove, 3-negative pressure cavity, 41-big hole, 42-small hole, 43-taper hole, 5-mounting groove, 6-air extraction channel, 7-negative pressure machine, 8-upper shell, 9-scanning camera, 10-vent hole, 11-lifting electric telescopic rod, 12-lifting plate, 13-stable polish rod, 14-positioning plate, 15-positioning screw, 16-positioning plate, 17-internal thread sleeve, 18-positioning polish rod, 19-rolling ball groove, 20-rolling ball, 21-ventilation net, 22-upright post, 23-movable block groove, 24-movable block, 25-spring, 26-ventilation groove, 27-piston rod, 28-blocking ball, 29-upper shell accommodating groove and 30-light supplementing lamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the electronic processing method of the bill document comprises the following steps; s1, scanning, namely scanning the paper bill document in a framing manner by using image scanning equipment to generate an initial digital image; s2, naming the initial digital image obtained in S1; s3, processing the named initial digital image obtained in S2; a) splicing, namely splicing a plurality of digital images formed by scanning the frames to form a complete image so as to ensure the integrity of the digital image of the paper file; b) rotating and correcting, namely, rotating and restoring the digital image which does not accord with the reading direction, and correcting the image which is deviated to achieve the visual orthographic view of the image; c) cutting edges, cutting the digital image, and cutting the image at the position 2-3 mm away from the most extension of the margin; d) decontaminating, decontaminating the digital image to remove the stains and the impurities which affect the image quality of the black edges of the stain lines generated in the scanning process, following the principle of showing the original appearance of the file, and not removing the original paper fading spots, water stains, stains and binding hole traces of the file page in the processing process; s4, checking the image quality, namely checking the digital image obtained in the S3; e) rescanning when the digital image is incomplete, cannot be clearly identified or has high image distortion; f) the conditions of missed scan, repeated scan, multiple scan, etc. should be corrected in time. g) And when the arrangement sequence of the digital images is inconsistent with the original file, adjusting. h) Checking the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions, and performing image processing again when the digital image splicing, rotating, correcting, cutting edges and decontaminating conditions are found not to meet the image quality requirement; s5, naming the finished product image, and naming the finished product digital image obtained in S4; and S6, storing the images, and storing the finished product images obtained in the S5 in a database. The archive scanning should select corresponding scanning equipment according to the actual situation, the digitalization purpose, the digitalization scale, the computer network, the storage condition and the like of the original paper archive, and set and adjust the relevant parameters. The setting and adjustment of the parameters should ensure that the scanned digital image is clear, complete and undistorted, and the image effect is closest to the original appearance of the archive. The scanning device is selected by paying special attention to the protection of the archive entity and is digitized by adopting the scanning device with small destructiveness of the archive entity as much as possible. The files exceeding the scanning size of the used scanner can be scanned by a larger-format scanner, and can also be processed in a mode of splicing images after being scanned in frames by a small-format scanner. When framing scanning is carried out, enough overlap is reserved between adjacent images, and a framing method is definitely explained by adopting modes such as a standard plate and the like; if the automatic splicing mode of the software is adopted at the later stage, the overlapping size is recommended to be not smaller than 1/3 of the size of the corresponding original of the single image. To extremely precious and size anomalous archives, for convenient direct-viewing demonstration original paper size, can adopt modes such as mark plate, scale to sign information such as original paper size. Regular maintenance and maintenance should be performed according to the usage rule of the relevant equipment. The color mode is scanned, and the archive original information is reserved to the maximum extent, so that the utilization of various modes is facilitated, and the color mode is preferably adopted for scanning. The page has red head, seal or file with inserted photo, color picture, and multicolor character, and should be scanned in color mode. The page is black and white, and the writing is clear, the file without the picture is inserted, also can adopt black and white binary mode to scan. The page is black and white, but the definition of the writing is poor or the file with the picture can also be scanned by adopting a gray mode. The scanning resolution and the selection of the scanning resolution are required to ensure that the scanned image is clear and complete, and factors such as a later utilization mode of the digital image and the like are comprehensively considered. The scan resolution should be no less than 200 dpi. If the characters are small, dense and poor in definition, the scanning resolution is recommended to be not less than 300 dpi. For example, in other applications such as Computer Output Microphotography (COM), emulation copy, printing and publishing, the scanning resolution can be adjusted as necessary. The file needing COM output is scanned with the resolution suggestion not less than 300 dpi; files needing high-precision simulation copying are scanned with a resolution suggestion of not less than 600 dpi; the files needing to be printed and published can be combined with the file breadth, the printed and published breadth, the printing precision requirement and the like to select the proper resolution. The storage format and the long-term storage format of the paper archive digital image are common formats such as TFF, JPEG or JPEG2000, and the selection of the image compression rate can be determined according to the requirements of practical application. When the paper archive digital image is used, the image can be comprehensively considered from the aspects of network browsing speed, easy operability, storage space occupation and the like, and the image is converted into other formats such as OFD (office file format) and PDF (Portable document format). The same storage format should be used for the same batch of files. Image naming, digital images should be named on the basis of the document number. The choice of the way the image is named should ensure the uniqueness of the image naming. It is proposed to store digital images as single-page files, naming the images by a combination of document number and image serial number. When a digital image is to be stored as a multi-page document, the image may be named using the file number of the file. The storage path of the paper archive digital image should be scientifically established, and the accuracy of data hanging is ensured. And image processing and splicing, namely splicing a plurality of digital images formed by scanning the images into a complete image so as to ensure the integrity of the digital images of the paper archives. During splicing, the spliced parts are smoothly fused, and the spliced whole image has no obvious splicing trace. And rotating and correcting deviation, and rotating and restoring the digital image which does not accord with the reading direction. The image with the deflection is subjected to deviation rectification processing so as to achieve the aim of basically not feeling the deflection visually. And (4) cutting edges, namely cutting the digital image at a position which is at least 2 mm-3 mm away from the most extension of the margin if the digital image needs to be cut. And (4) decontamination, namely decontaminating the digital image if necessary to remove impurities which affect the image quality, such as stains, dirty line black edges and the like generated in the scanning process, and the original marks of the paper fading spots, water stains, binding holes and the like of the file page cannot be removed in the treatment process according to the principle of showing the original appearance of the file. And in the image quality inspection, when the digital image is incomplete and cannot be clearly identified or the image distortion is large, rescanning is required. The conditions of missed scan, repeated scan, multiple scan, etc. should be corrected in time. When the arrangement sequence of the digital images is inconsistent with the original files, the digital images are adjusted in time. And (4) checking the processing conditions of digital image splicing, rotation, deviation correction, edge cutting, decontamination and the like, and when the digital image is found not to meet the image quality requirement, carrying out image processing again.

Particularly, image scanning equipment includes base 1, bill standing groove 2 has been seted up to the upper end of base, negative pressure chamber 3 has been seted up to the inside of base, negative pressure chamber has evenly seted up the negative pressure suction hole with the bill standing groove, mounting groove 5 has been seted up on the lateral wall of base, bleed passage 6 has been seted up between mounting groove and the negative pressure chamber, the inside of mounting groove is equipped with negative pressure machine 7, the inlet end of negative pressure machine stretches into bleed passage, the upper end activity of base is provided with epitheca 8, the inside of epitheca is equipped with scanning camera 9, air vent 10 has evenly been seted up to the upper side wall of epitheca, negative pressure machine can make the negative pressure intracavity produce the negative pressure, make the air in the bill standing groove get into the negative pressure chamber by the negative pressure suction hole, the circulation of air can make the fold expansion of the bill placed in the bill standing groove and the rigidity of bill, increase the shooting effect of scanning camera to the bill.

Particularly, the upper end of base is equipped with lifting electric telescopic handle 11, the one end of epitheca is equipped with lifting plate 12, lifting electric telescopic handle's drive end links to each other with the lifting plate is fixed, the bilateral symmetry that just is located lifting electric telescopic handle on the lifting plate runs through movable mounting and has stable polished rod 13, the lower extreme that stabilizes the polished rod all links to each other with the fixed of base, lifting electric telescopic handle extends the action and can drive lifting plate and epitheca synchronous upward movement break away from the base, the lifting telescopic handle shortens the action and can drive lifting plate and epitheca synchronous downward movement and combine together with the base, the phenomenon that lifting plate and epitheca produced rocking in the motion process can be avoided in the setting of stable polished rod, this setting can realize the combination and the separation of electric control epitheca and base, convenient operation saves physical power.

Particularly, the fixed lower extreme that sets up in positioning plate 14 of scanning camera, the upper end of epitheca is equipped with positioning screw 15, cup joint movable mounting has locating plate 16 on the positioning screw, the equal threaded connection in upper and lower both sides that just is located the locating plate on the positioning screw has interior thread bush 17, the last lateral wall symmetry of epitheca runs through movable mounting has positioning polished rod 18, the lower extreme of positioning polished rod all links to each other with positioning plate is fixed, the upper end of positioning polished rod all links to each other with the locating plate is fixed, change the high position of locating plate on positioning screw because positioning polished rod makes its relative position with positioning plate fixed, can change the high position of positioning plate in the epitheca, can change the high position of scanning camera in the epitheca, and twist the internal thread bush of screw and can fix the position of locating plate on positioning screw.

Particularly, the end face of the internal thread sleeve, which is close to one side of the positioning plate, is uniformly provided with a rolling ball groove 19, a rolling ball 20 is movably arranged on the rolling ball groove in an embedded mode, and when the internal thread sleeve extrudes and positions the positioning plate, the rolling ball can enable rolling friction to be generated between the internal thread sleeve and the positioning plate, so that the resistance to screwing the internal thread sleeve is reduced.

Specifically, the negative pressure suction hole comprises a large hole 41, a small hole 42 and a taper hole 43, the large hole is connected with the small hole through the taper hole, an air passing net 21 is arranged in the large hole, air can pass through the air passing net, an upright post 22 is arranged at the upper end of the air passing net, a movable block groove 23 is arranged at the upper end of the upright post, a movable block 24 is movably arranged in the movable block groove, the movable block can change position in the movable block groove in a vertical scheme, a spring 25 is arranged between the lower end of the movable block and the groove bottom of the movable block groove, the movable block groove can limit the spring to shrink in the vertical direction, vent grooves 26 are uniformly arranged on the side wall of the upright post, the vent grooves can balance air pressure in the movable block groove when the movable block moves in the vertical direction, the vent grooves are communicated with the movable block groove, a piston rod 27 is arranged at the upper end of the piston rod, a plugging ball 28 is arranged at the upper end of the piston, and the spring can enable the plugging ball to be positioned in the taper hole, the small holes are blocked, after the negative pressure generated in the negative pressure cavity overcomes the elastic force of the spring, the small balls move downwards, so that the control can be realized by the large holes, the small holes and the taper holes, and because the specifications of the negative pressure suction holes, the spring and the blocking balls are the same, when the air pressure in the negative pressure cavity can overcome the elastic force of the spring, the blocking balls in the negative pressure suction holes synchronously move downwards, so that the effect of uniform negative pressure generated in all the small holes is realized, the uniform adsorption effect of the negative pressure suction holes on bills is further increased, and the bills are placed more smoothly in the bill placing groove.

Specifically, the diameter of the blocking ball is smaller than that of the large hole, and the diameter of the blocking ball is larger than that of the small hole.

Particularly, the upper shell holding tank 29 has been seted up to the upper end of base and the outside that is located the bill standing groove, and the setting of upper shell holding tank 29 can increase the light transmissivity of preventing of the department that links to each other of upper shell and base, further prevents the image that external light shot to scanning camera.

In particular, the scanning camera is a color industrial camera.

The lower extreme of positioning plate has light filling lamp 30, and the light filling lamp can help the scanning camera to shoot the bill document.

In the invention: the negative pressure machine, the scanning camera, the lifting electric telescopic rod and the light supplementing lamp are electrically connected with the control computer, the control computer can control the opening and closing of the negative pressure machine and the size of negative pressure, the control computer can control the opening and closing of the scanning camera, the scanning camera transmits images generated by a scanning surface to the control computer, the control computer can control the lifting electric telescopic rod to extend or shorten, and the control computer can control the opening and closing of the light supplementing lamp and the brightness of the light supplementing lamp. Placing a bill document to be scanned on a bill placing groove, controlling a lifting electric telescopic rod to shorten and operate by using a control computer, driving an upper shell to move downwards in a vertical direction by the shortening operation of the lifting electric telescopic rod, stopping the shortening operation of the lifting electric telescopic rod after the lower end of the upper shell is contacted with the bottom of an upper shell accommodating groove, controlling a negative pressure machine to be started by using the control computer, emitting light by a light supplementing lamp and a scanning camera to be started, transmitting data to the control computer after the scanning of the bill document by the scanning camera, controlling the negative pressure machine to be closed, the light supplementing lamp to be closed and the scanning camera to be closed by using the control computer after the scanning is finished, controlling the lifting electric telescopic rod to extend and reset, enabling the upper shell to move upwards vertically to be separated from a base, taking out the bill in the bill placing groove, and continuously scanning the bill by repeating the above operation, and subsequently, the electronic image is correspondingly processed by utilizing the control computer.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.