阅读说明：本技术 一种地质勘探光电测量装置 (Photoelectric measuring device for geological exploration ) 是由 赵宝英 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种地质勘探光电测量装置,涉及光电测量技术领域,主要是为了解决现有的地质勘探光电测量装置存在实用性差和使用不便的问题,包括固定测量机构、活动测量机构、旋转机构和调节机构,固定测量机构包括第一相机组和承载部,调节机构中的粗调组件和微调组件之间相互配合使用的设计,能够较为精确地调节活动测量机构中的第二相机组相较于承载部的倾斜角度,从而能够较为精确的测量出被测物表面上的不同角度的特征处的相关参数,并且微调组件中的滑移件通过移动能够带动第四传动齿轮与旋转机构上的传动组件连接,进而带动旋转机构和活动测量机构作周转运动,从而能够测量到被测量物周圈的参数,具备实用性强和使用方便的特点。(The invention discloses a geological exploration photoelectric measuring device, which relates to the technical field of photoelectric measurement and mainly aims to solve the problems of poor practicability and inconvenient use of the existing geological exploration photoelectric measuring device, and comprises a fixed measuring mechanism, a movable measuring mechanism, a rotating mechanism and an adjusting mechanism, wherein the fixed measuring mechanism comprises a first camera set and a bearing part, a coarse adjusting component and a fine adjusting component in the adjusting mechanism are designed to be matched with each other for use, the inclination angle of a second camera set in the movable measuring mechanism relative to the bearing part can be adjusted relatively accurately, so that the relevant parameters of characteristics of different angles on the surface of a measured object can be measured relatively accurately, a sliding piece in the fine adjusting component can drive a fourth transmission gear to be connected with a transmission component on the rotating mechanism through movement, and further drive the rotating mechanism and the movable measuring mechanism to perform turnover movement, thereby can measure the parameter of measurand object week, possess the practicality strong and convenient to use's characteristics.)

1. Photoelectric measuring device for geological prospecting, comprising a fixed measuring organ (1), said fixed measuring organ (1) comprising a first camera group (12) and a bearing (14), characterized in that it further comprises:

a movable measuring mechanism (3), the movable measuring mechanism (3) comprising a movable platform (32); the camera comprises a movable platform (32), a plurality of linkage assemblies (34) connected with the movable platform (32), a second camera set (31) is arranged on the movable platform (32), one end of each linkage assembly (34) is connected with an eccentric assembly (33), and the bearing part (14) is connected with the eccentric assembly (33); and

a rotating mechanism (2), the rotating mechanism (2) comprising a rotating part (22) connected with the movable measuring mechanism (3); and a transmission assembly (21) connected with the rotating part (22); and

an adjustment mechanism (4), the adjustment mechanism (4) comprising a coarse adjustment assembly (41) connected to an eccentric assembly (33); and a fine adjustment assembly (42), the fine adjustment assembly (42) comprising a glide (423); and the fourth transmission gear (424) is positioned on the sliding piece (423) and is used for driving the fourth transmission gear (424) to be respectively connected with the rough adjusting component (41) and the transmission component (21) so as to respectively drive the movable measuring mechanism (3) and the rotating mechanism (2) to move.

2. A photoelectric surveying device according to claim 1, characterized in that said eccentric assembly (33) comprises an eccentric (331) connected to a coarse adjustment assembly (41); and a rolling part (332) positioned on the eccentric part (331), wherein a sleeve (333) used for installing the bearing part (14) is also arranged on the eccentric part (331), and the bearing part (14) is static relative to the eccentric part (331).

3. A geological exploration photoelectric measurement device according to claim 1, characterized in that said linkage assembly (34) comprises a linkage (343) articulated with the mobile platform (32); and the sliding part (342) is hinged with the linkage part (343), and the end part of the sliding part (342) is provided with a pressure bearing part (341) which is used for bearing the pressure of the rolling part (332) to drive the sliding part (342) to move so as to drive the movable platform (32) and the second camera set (31) to incline.

4. A photoelectric measurement device for geological exploration, as claimed in claim 3, characterized in that said sliding element (342) is further sheathed with a resetting element (344) for driving the movable platform (32) to reset.

5. A geological surveying photoelectric measuring device according to claim 3, characterized in that said rotating portion (22) comprises a second skeleton (221); and the gear teeth (223) are positioned on the second framework (221), the second framework (221) is provided with a guide piece (222), and the sliding piece (342) is in sliding connection with the guide piece (222).

6. A geophysical prospecting photoelectric measuring device according to claim 1, characterized in that said coarse tuning assembly (41) comprises a coarse tuning rod (412) connected in a central position of the eccentric (331); and a third transmission gear (413) positioned on the coarse adjustment rod (412), wherein the third transmission gear (413) is meshed with the fourth transmission gear (424).

7. A photoelectric measuring device for geological surveying according to claim 1, characterized in that said transmission assembly (21) comprises a second transmission gear (214) in meshing connection with a gear tooth (223); and the first transmission gear (211) is meshed with the fourth transmission gear (424), and the first transmission gear (211) drives the second transmission gear (214) to rotate through the belt transmission assembly (213).

8. The photoelectric measurement device for geological exploration according to claim 1, characterized in that said fine tuning assembly (42) further comprises a fine tuning rod (422), said fine tuning rod (422) is provided with a limiting member (426) connected to the sliding member (423), and the sliding member (423) drives the fourth transmission gear (424) to move between the second transmission gear (214) and the third transmission gear (413) through the limiting member (426).

9. A geological surveying photoelectric measuring device according to claim 1, characterized in that said fixed measuring means (1) further comprises a first skeleton (11); and the human-computer interaction interface (13) is positioned on the first framework (11), the first camera set (12) and the second camera set (31) are electrically connected with the human-computer interaction interface (13), and the movable measuring mechanism (3), the rotating mechanism (2) and the adjusting mechanism (4) are all installed on the first framework (11).

Technical Field

The invention relates to the technical field of photoelectric measurement, in particular to a geological exploration photoelectric measurement device.

Background

In the geological exploration process, photoelectric measuring equipment or instruments are needed to measure the shape, size and other important parameters of rock and soil blocks, stones, fossil and the like, so that geologists can conveniently know the relevant information of the geology.

However, the cameras on the existing photoelectric measuring devices for geological exploration are all vertically arranged relative to the object stage, when the measured rock mass or stone is a polyhedron, and a plurality of holes or protrusions with different angles exist on the polyhedron, the parameters such as the depth or the height of the holes or the protrusions cannot be directly measured only by the cameras with fixed angles, and if the angles or the positions of the rock mass or stone are adjusted by hands, the holes or the protrusions are easily damaged, so that the measurement work is not smooth, and the work efficiency is reduced.

Disclosure of Invention

The present invention is directed to a photoelectric measuring device for geological exploration, which solves the above problems.

In order to achieve the above purpose, the present application provides the following technical solutions:

the utility model provides a prospecting photoelectric measuring device, includes fixed measuring mechanism, fixed measuring mechanism includes first camera group and bearing part, still includes:

a movable measuring mechanism comprising a movable platform; the movable platform is provided with a second camera set, one end of the linkage assembly is connected with an eccentric assembly, and the bearing part is connected with the eccentric assembly; and

a rotating mechanism comprising a rotating portion connected to the movable measuring mechanism; and a transmission assembly connected with the rotating part; and

an adjustment mechanism comprising a coarse adjustment assembly connected to an eccentric assembly; the fine adjustment component comprises a sliding piece; and the fourth transmission gear is positioned on the sliding piece and used for driving the fourth transmission gear to be respectively connected with the rough adjusting assembly and the transmission assembly so as to respectively drive the movable measuring mechanism and the rotating mechanism to move.

As a further aspect of the present application: the eccentric component comprises an eccentric part connected with the coarse adjusting component; and the rolling part is positioned on the eccentric part, a sleeve for mounting the bearing part is also arranged on the eccentric part, and the bearing part is static relative to the eccentric part.

As a still further aspect of the present application, the linkage assembly includes a linkage member hinged to the movable platform; and the sliding part is hinged with the linkage part, and the end part of the sliding part is provided with a pressure bearing part for bearing the pressure of the rolling part to drive the sliding part to move so as to drive the movable platform and the second camera set to incline.

As a still further aspect of the present application: and the sliding part is also sleeved with a resetting part for driving the movable platform to reset.

As a still further aspect of the present application: the rotating part comprises a second framework; and the gear teeth are positioned on the second framework, a guide piece is arranged on the second framework, and the sliding piece is connected with the guide piece in a sliding manner.

As a still further aspect of the present application: the coarse adjustment assembly comprises a coarse adjustment rod connected to the center of the eccentric part; and the third transmission gear is positioned on the coarse adjustment rod and meshed with the fourth transmission gear.

As a still further aspect of the present application: the transmission assembly comprises a second transmission gear meshed with the gear teeth; and the first transmission gear is in meshed connection with the fourth transmission gear and drives the second transmission gear to rotate through the belt transmission assembly.

As a still further aspect of the present application: the fine adjustment assembly further comprises a fine adjustment rod, a limiting part connected with the sliding part is arranged on the fine adjustment rod, and the sliding part drives the fourth transmission gear to move between the second transmission gear and the third transmission gear through the limiting part.

As a still further aspect of the present application: the fixed measuring mechanism further comprises a first framework; and the first camera set and the second camera set are electrically connected with the human-computer interaction interface, and the activity measuring mechanism, the rotating mechanism and the adjusting mechanism are all arranged on the first framework.

Compared with the prior art, the beneficial effects of this application are:

the design that the coarse adjustment component and the fine adjustment component in the adjusting mechanism are matched with each other for use can adjust the inclination angle of a second camera set in the movable measuring mechanism compared with the bearing part more accurately, so that the relevant parameters of the characteristic positions of different angles on the surface of a measured object can be measured more accurately, a sliding piece in the fine adjustment component can drive a fourth transmission gear to be connected with a transmission component on the rotating mechanism through movement, the rotating mechanism and the movable measuring mechanism are driven to do turnover movement, the parameters of the whole circle of the measured object can be measured, the device has the characteristics of strong practicability and convenience in use, and the problems of poor practicability and inconvenience in use of the existing geological exploration photoelectric measuring device are solved.

Drawings

FIG. 1 is a schematic view of the overall structure of a geological exploration photoelectric measurement device according to an embodiment of the invention.

Fig. 2 is a first perspective view of a rotating portion in an embodiment of the present invention.

Fig. 3 is a second perspective view of the rotating portion in the embodiment of the present invention.

FIG. 4 is a schematic view of the linkage assembly and the rotating part assembled according to the embodiment of the present invention.

FIG. 5 is a schematic view of the linkage assembly and the eccentric assembly assembled according to an embodiment of the present invention.

Fig. 6 is a schematic view of the assembly of the movable measuring mechanism and the bearing part in the embodiment of the invention.

Fig. 7 is a perspective view of an adjustment mechanism in an embodiment of the present invention.

Fig. 8 is an enlarged view of a transmission assembly in an embodiment of the present invention.

Fig. 9 is an assembly schematic diagram of the movable measuring mechanism, the rotating mechanism and the adjusting mechanism in the embodiment of the invention.

In the figure: 1-fixed measuring mechanism, 11-first framework, 12-first camera set, 13-human-computer interaction interface, 14-bearing part, 141-loop bar, 2-rotating mechanism, 21-transmission component, 211-first transmission gear, 212-first transmission shaft, 213-belt transmission component, 214-second transmission gear, 215-second transmission shaft, 22-rotating part, 221-second framework, 222-guide piece, 223-gear tooth, 224-guide rail, 3-movable measuring mechanism, 31-second camera set, 32-movable platform, 33-eccentric component, 331-eccentric component, 332-rolling part, 333-sleeve, 34-linkage component, 341-bearing component, 342-sliding component, 343-linkage component, 344-reset piece, 4-adjusting mechanism, 41-coarse adjusting component, 411-coarse adjusting knob, 412-coarse adjusting rod, 413-third transmission gear, 42-fine adjusting component, 421-fine adjusting knob, 422-fine adjusting rod, 423-sliding piece, 424-fourth transmission gear, 425-adsorption piece and 426-limiting piece.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 9, the present embodiment provides a photoelectric measuring apparatus for geological exploration, including a fixed measuring mechanism 1, where the fixed measuring mechanism 1 includes a first camera set 12 and a bearing portion 14, and further includes:

a movable measuring mechanism 3, said movable measuring mechanism 3 comprising a movable platform 32; the movable platform 32 is provided with a second camera set 31, one end of the linkage assembly 34 is connected with an eccentric assembly 33, and the bearing part 14 is connected with the eccentric assembly 33; and

a rotating mechanism 2, the rotating mechanism 2 comprising a rotating part 22 connected with the movable measuring mechanism 3; and a transmission assembly 21 connected with the rotating part 22; and

an adjustment mechanism 4, said adjustment mechanism 4 comprising a coarse adjustment assembly 41 connected to an eccentric assembly 33; and a fine adjustment assembly 42, the fine adjustment assembly 42 including a glide 423; and a fourth transmission gear 424 positioned on the sliding member 423, for driving the fourth transmission gear 424 to be respectively connected with the rough adjusting assembly 41 and the transmission assembly 21, so as to respectively drive the movable measuring mechanism 3 and the rotating mechanism 2 to move.

Referring to fig. 1 to 9, in the above-mentioned technical solution, the carrying portion 14 is designed as a carrying plate or a carrying platform, where the specific shape and material are not limited, and the carrying portion 14 is installed with a loop bar 141.

As can be seen from the above, the rough adjusting assembly 41 can directly drive the eccentric assembly 33 to make eccentric motion, in order to rapidly rotate the eccentric assembly 33 from one linkage assembly 34 to another adjacent linkage assembly 34, at this time, the fourth transmission gear 424 on the sliding member 423 is moved to the position connected with the rough adjusting assembly 41 by sliding the sliding member 423, at this time, the rough adjusting assembly 41 and the eccentric assembly 33 can be driven by rotating the sliding member 423 to reduce the rotation speed of the eccentric assembly 33, so that the movable platform 32 and the second camera set 31 are slowly driven by the linkage assembly 34 to tilt by a certain angle, which is convenient for measuring related parameters of small features of different angles of the surface of the object to be measured on the bearing part 14;

when the second camera set 31 is required to measure the related parameters of the surface of the measured object in different directions, the first camera set 12 located above the bearing part 14 can measure the parameters of the upper surface of the measured object, and the moving sliding piece 423 drives the fourth transmission gear 424 to be connected with the transmission assembly 21, so that the fine adjustment assembly 42 can drive the rotating mechanism 2 and the movable measuring mechanism 3 located in the rotating mechanism 2 to make circular motion, and the second camera set 31 can measure the circumference of the measured object.

Referring to fig. 4 to 5, further, the eccentric assembly 33 includes an eccentric member 331 connected to the coarse adjustment assembly 41; and a rolling part 332 on the eccentric part 331, the eccentric part 331 is further provided with a sleeve 333 for mounting the bearing part 14, the bearing part 14 is stationary relative to the eccentric part 331, the eccentric part 331 is designed as a rotating disc or a rotating plate or a rotating rod, etc., the outline is not limited, the rolling part 332 is designed as a combination structure of a roller and a support rod, the rolling part 332 is connected to a position far from the center on the eccentric part 331 through the support rod, so that the roller can do eccentric motion, of course, the rolling part 332 may be designed as a combination of a ball and a rod, etc., and the sleeve 333 is installed at the center of the eccentric member 331 without limitation, the sleeve rod 141 of the bearing part 14 is inserted into the sleeve 333, when the eccentric 331 rotates, the stem 141 remains stationary relative to the sleeve 333, so that the carrier 14 can remain stationary, of course, in order to reduce the frictional force between the sleeve 333 and the rod 141, a lubricant such as a lubricating oil may be added.

Referring to fig. 4 to 5, further, the linkage assembly 34 includes a linkage member 343 hinged to the movable platform 32; and a sliding member 342 hinged to the link member 343, the end of the sliding member 342 is provided with a pressure-bearing member 341 for bearing the pressure of the rolling portion 332 to drive the sliding member 342 to move, and further drive the movable platform 32 and the second camera set 31 to tilt, the link member 343 is designed as a connecting rod, the sliding member 342 is designed as a sliding rod, the pressure-bearing member 341 is designed as a wedge-shaped block, when the rolling portion 332 on the eccentric member 331 slides along the inclined surface on the wedge-shaped block, a pressure along the axial direction of the sliding rod can be applied to the wedge-shaped block, and further the movable platform 32 is driven to tilt by the link member 343 by a certain angle, because the plurality of link members 34 are symmetrical with respect to the center of the movable platform 32, when one of the link members 34 moves, the rest of the link members 34 are also driven to move by the inclination of the movable platform 32, and any one of the plurality of link members 34 can be driven to move by rotating the eccentric member 331, thereby causing the movable platform 32 to tilt in different directions.

Referring to fig. 5, further, a reset member 344 for driving the movable platform 32 to reset is further sleeved on the sliding member 342, the reset member 344 is designed as a reset spring, when the rolling portion 332 presses the pressure-bearing member 341, the reset spring is in a compressed state, and when the rolling portion 332 leaves from the pressure-bearing member 341, the elastic deformation of the reset spring can drive the pressure-bearing member 341 to reset, thereby driving the movable platform 32 to automatically return to the positive position.

Of course, the return spring may also be designed as an elastic rubber sleeve sleeved on the sliding member 342, which is a conventional technical means in the prior art and will not be described in detail herein.

Referring to fig. 2 to 3, further, the rotating portion 22 includes a second frame 221; and the gear teeth 223 are located on the second framework 221, the second framework 221 is provided with the guide piece 222, the sliding piece 342 is connected with the guide piece 222 in a sliding manner, the guide piece 222 is designed into a fixing ring or a fixing block and the like which are installed on the second framework 221, the fixing ring in the drawing is used for illustration, the fixing ring is provided with a through hole, the sliding piece 342 penetrates through the through hole, and the through hole plays a role in guiding, so that the sliding piece 342 can make a linear motion.

Referring to fig. 9, as an embodiment of the present application, the coarse adjustment assembly 41 includes a coarse adjustment rod 412 connected to a center of the eccentric member 331; and a third transmission gear 413 positioned on the coarse adjustment rod 412, wherein the third transmission gear 413 is meshed with a fourth transmission gear 424, and a coarse adjustment knob 411 is arranged at the end part of the coarse adjustment rod 412, so that a worker can conveniently rotate the coarse adjustment rod 412.

Referring to fig. 9, further, the transmission assembly 21 includes a second transmission gear 214 engaged with the gear teeth 223; and a first transmission gear 211 engaged with the fourth transmission gear 424, wherein the first transmission gear 211 drives the second transmission gear 214 to rotate through a belt transmission assembly 213, the second transmission gear 214 is connected with a second transmission shaft 215, the first transmission gear 211 is connected with a first transmission shaft 212, and the belt transmission assembly 213 comprises a first synchronizing wheel arranged on the second transmission shaft 215, a second synchronizing wheel arranged on the first transmission shaft 212 and a synchronizing belt connected between the first synchronizing wheel and the second synchronizing wheel.

Of course, the belt driving assembly 213 can also be directly replaced by a chain driving assembly, that is, the first synchronous pulley is replaced by a first chain wheel, the second synchronous pulley is replaced by a second chain wheel, and the synchronous belt is replaced by a driving chain, which is a conventional technical means in the prior art and will not be described again.

Referring to fig. 9, further, the fine adjustment assembly 42 further includes a fine adjustment rod 422, the fine adjustment rod 422 is provided with a limiting member 426 connected to the sliding member 423, the sliding member 423 drives the fourth transmission gear 424 to move between the second transmission gear 214 and the third transmission gear 413 through the limiting member 426, the end of the fine adjustment rod 422 is connected to a fine adjustment knob 421, the limiting member 426 is designed as a limiting rib extending along the axial direction of the fine adjustment rod 422, correspondingly, the sliding member 423 is designed as a sleeve sleeved on the fine adjustment rod 422, and the inner wall of the sleeve is designed with a limiting groove used in cooperation with the limiting rib, when the fine adjustment rod 422 is driven to rotate by the fine adjustment knob 421, the sliding member 423 and the fourth transmission gear 424 can be driven to rotate through the cooperation of the limiting rib and the limiting groove, and at the same time, the sliding member 423 can be pulled or pushed by hand to make a linear motion along the limiting rib, so as to realize the function of respectively driving the movable measurement mechanism 3 and the rotation mechanism 2 to move, the sliding member 423 is further provided with an adsorbing member 425 for adsorbing the fine adjustment knob 421, so as to fix the position of the fourth transmission gear 424, the adsorbing member 425 may be designed as a magnet, correspondingly, the fine adjustment knob 421 should be made of a metal capable of adsorbing the magnet, such as iron, and the like, the adsorbing member 425 may also be designed as a rubber or silica gel suction nozzle for adsorbing the surface of the fine adjustment knob 421, and of course, the adsorbing member 425 may also be designed as other structural forms, which is not limited herein;

and the diameter of the fourth transmission gear 424 is designed to be smaller than that of the third transmission gear 413, according to the meshing principle of gears, so that when the fine adjustment knob 421 is rotated by a worker at the same speed through a finger, the angular speed of the eccentric member 331 is reduced, and the speed of the rolling part 332 moving on the pressure bearing member 341 is reduced, so that the variation range of the inclined movement of the movable platform 32 is reduced, which is beneficial to more accurately adjusting the position of the second camera set 31, and has the characteristic of accurately adjusting the second camera set 31, thereby improving the measurement accuracy.

Referring to fig. 7, further, the fixed measuring mechanism 1 further includes a first frame 11; and the man-machine interaction interface 13 is positioned on the first framework 11, the first camera set 12 and the second camera set 31 are electrically connected with the man-machine interaction interface 13, the movable measuring mechanism 3, the rotating mechanism 2 and the adjusting mechanism 4 are all installed on the first framework 11, the second framework 221 is provided with a guide rail 224, correspondingly, the first framework 11 is further provided with a sliding groove, the second framework 221 slides in the sliding groove through the guide rail 224 and is used for improving the stability of the rotating mechanism 2 and further improving the measuring accuracy, relevant parameters of a measured object detected in the first camera set 12 and the second camera set 31 can be known by observing the man-machine interaction interface 13, and meanwhile, self parameters on the first camera set 12 and the second camera set 31 can be adjusted through the man-machine interaction interface 13.

When the device is used, the rough adjusting component 41 can directly drive the eccentric component 33 to do eccentric motion, so that the eccentric component 33 can be rapidly rotated from one linkage component 34 to another adjacent linkage component 34, at the moment, the fourth transmission gear 424 on the sliding component 423 is moved to the position connected with the rough adjusting component 41 through sliding the sliding component 423, at the moment, the rough adjusting component 41 and the eccentric component 33 can be driven through rotating the sliding component 423 to reduce the rotating speed of the eccentric component 33, so that the movable platform 32 and the second camera set 31 are slowly driven to incline by a certain angle through the linkage component 34, and related parameters of small characteristics of different angles of the surface of an object to be measured on the bearing part 14 can be conveniently measured;

when the second camera set 31 is required to measure the parameters related to the surfaces of the object to be measured in different directions, the first camera set 12 located above the bearing portion 14 can measure the parameters of the upper surface of the object to be measured, and the fine adjustment assembly 42 can drive the rotating mechanism 2 and the movable measuring mechanism 3 located in the rotating mechanism 2 to make a circular motion by driving the fourth transmission gear 424 to be connected with the transmission assembly 21 through the movable sliding member 423, so that the second camera set 31 can measure the circumference of the object to be measured.

In summary, the design of the coarse adjustment component 41 and the fine adjustment component 42 in the adjustment mechanism 4, which are used in cooperation with each other, can more accurately adjust the inclination angle of the second camera set 31 in the movable measurement mechanism 3 compared with the bearing portion 14, so as to more accurately measure the relevant parameters of the feature points of different angles on the surface of the measured object, and the sliding member 423 in the fine adjustment component 42 can drive the fourth transmission gear 424 to be connected with the transmission component 21 on the rotation mechanism 2 through movement, so as to drive the rotation mechanism 2 and the movable measurement mechanism 3 to perform a revolving motion, so as to measure the parameters of the circumference of the measured object.

It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications, improvements and substitutions can be made, which are all within the protection scope of the present technical solution.