阅读说明：本技术 一种防断电自动抄表系统 (Automatic meter reading system capable of preventing power failure ) 是由 吴洪学 项稚涵 罗郡 孔祥麟 陈勇 李培源 常强 李毅 陈本富 汪碧顺 王斌 于 2021-09-06 设计创作，主要内容包括：本发明公开了一种防断电自动抄表系统,包括电能表；辅助电源单元,所述辅助电源单元设置在所述电能表底部,所述辅助电源单元包括安装外壳以及集成控制模块,所述集成控制模块包括主控组件、市电检测组件以及通信组件,所述主控组件、市电检测组件以及通信组件均设置在所述安装外壳内；以及,远程控制中心,所述远程控制中心与所述电能表连接；本发明通过给现有电能表安装辅助电源单元建立一套完善的防断电自动抄表系统,能够有效的提高电能表在停断电期间的抄表时效性以及自动抄表率,从而保证电能计量数据的准确性。(The invention discloses an automatic meter reading system for preventing power failure, which comprises an electric energy meter; the auxiliary power supply unit is arranged at the bottom of the electric energy meter and comprises an installation shell and an integrated control module, the integrated control module comprises a main control assembly, a mains supply detection assembly and a communication assembly, and the main control assembly, the mains supply detection assembly and the communication assembly are all arranged in the installation shell; the remote control center is connected with the electric energy meter; according to the invention, a set of complete anti-outage automatic meter reading system is established for the conventional electric energy meter with an auxiliary power supply unit, so that the meter reading timeliness and the automatic meter reading rate of the electric energy meter during outage can be effectively improved, and the accuracy of electric energy metering data is ensured.)

1. The utility model provides a prevent outage automatic meter reading system which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

an electric energy meter (100);

the auxiliary power supply unit (200) is arranged at the bottom of the electric energy meter (100), the auxiliary power supply unit (200) comprises an installation shell (201) and an integrated control module (202), the integrated control module (202) comprises a main control component (202a), a mains supply detection component (202b) and a communication component (202c), and the main control component (202a), the mains supply detection component (202b) and the communication component (202c) are all arranged in the installation shell (201); and the number of the first and second groups,

a remote control center (300), the remote control center (300) being connected with the electric energy meter (100).

2. The power outage prevention automatic meter reading system according to claim 1, characterized in that: the main control assembly (202a), the commercial power detection assembly (202b) and the communication assembly (202c) are connected with the electric energy meter (100), and the remote control center (300) comprises a communication unit (301) and a data processing unit (302) which are connected with the electric energy meter (100).

3. The power outage prevention automatic meter reading system according to claim 2, characterized in that: the communication unit (301) is connected with the electric energy meter (100) through wireless communication, and the communication unit (301) adopts a DFBM-CS224-DT0R wireless communication module.

4. The power outage prevention automatic meter reading system according to claim 3, characterized in that: the electric energy meter is characterized in that a base (101) is arranged at the bottom of the electric energy meter (100), clamping rods (102) are arranged on two sides of the base (101), and notches (102a) are formed in the bottoms of the clamping rods (102).

5. The power-off prevention automatic meter reading system according to any one of claims 1 to 4, wherein: the auxiliary power supply unit (200) further comprises a locking module (203), an accommodating space (K) is formed in the shell (201), locking spaces (M) are formed in two ends of the shell (201) in the horizontal direction, the locking module (203) is arranged in the locking spaces (M), the size diameter of the accommodating space (K) is larger than that of the base (101), and a battery accommodating bin (204) is arranged at the bottom of the accommodating space (K).

6. The power outage prevention automatic meter reading system according to claim 5, characterized in that: the locking module (203) comprises a first elastic piece (203a) located at the bottom of the locking space (M), an extrusion end head (203b) is arranged at the top of the first elastic piece (203a), a second elastic piece (203c) is arranged in the horizontal straight line direction of the first elastic piece (203a), a contact end head (203d) is arranged at the top of the second elastic piece (203c), a Z-shaped swinging piece (203e) is arranged on the contact end head (203d), one end of the Z-shaped swinging piece (203e) is connected with the contact end head (203d), and a crane-shaped nozzle (203f) is arranged at the other end of the Z-shaped swinging piece and connected with a notch in the clamping rod (102).

7. The power outage prevention automatic meter reading system according to claim 6, characterized in that: the locking mechanism is characterized in that a limiting shaft (203g) penetrating through the Z-shaped swinging piece (203e) is arranged on the inner wall of the locking space (M), the Z-shaped swinging piece (203e) swings by taking the limiting shaft (203g) as an axis, a pressure lever (203h) is further arranged on the Z-shaped swinging piece (203e), the pressure lever (203h) is positioned on the same vertical direction with the second elastic piece (203c) and the tail end of the Z-shaped swinging piece (203e), jacks (201a) and threaded holes (201b) are arranged at two ends of the horizontal direction of the shell (201), the clamping rod (102) penetrates through the jacks (201a) and is arranged in the vertical direction of the first elastic piece (203a), and threads (203h-1) matched with the threaded holes (201b) are arranged on the pressure lever (203 h).

8. The power outage prevention automatic meter reading system according to claim 7, characterized in that: the battery accommodating bin (204) comprises a first accommodating bin (204a) and a second accommodating bin (204b), the first accommodating bin (204a) and the second accommodating bin (204b) are arranged at the bottom of the accommodating space (K) in a mirror image mode, two ends of the first accommodating bin (204a) and the second accommodating bin (204b) are respectively provided with a positive electrode touch panel (204c) and a negative electrode touch panel (204d), and guide rods (204e) are movably arranged on the positive electrode touch panel (204c) on the first accommodating bin (204a) and the negative electrode touch panel (204d) on the second accommodating bin (203 d).

9. The power outage prevention automatic meter reading system according to claim 8, characterized in that: still be provided with integrated board (205) in accommodation space (K), integrated board (205) set up battery holding storehouse (204) top, one side of integrated board (205) be provided with guide arm (204e) complex guide plate (205a), be provided with V type guide slot (205b) on guide plate (205a), guide arm (204e) one end with anodal touch panel (204c) and negative pole touch panel (204d) elastic connection, the other end of guide arm (204e) can be followed V type guide slot (205b) slides.

10. The power outage prevention automatic meter reading system according to claim 9, characterized in that: the utility model discloses a solar battery pack, including main control assembly (202a), commercial power detection subassembly (202b) and communication subassembly (202c) set up inside integrated board (205), the opposite side of integrated board (205) is provided with guide head (205c), base (101) set up on guide head (205c), first holding storehouse (204a) with second holding storehouse (204b) junction is provided with multiunit third elastic component (204f), third elastic component (204f) top is provided with press plate (204 g).

Technical Field

The invention relates to the technical field of electric energy metering, in particular to an anti-power-off automatic meter reading system.

Background

The electric energy metering management is an important link of production, operation and management of electric power enterprises and safe operation of a power grid, the technology and the management level of the electric energy metering management not only relate to the development and the enterprise image of the electric power enterprises, but also influence the accuracy and the justice of trade settlement, and relate to the benefits of vast electric power customers; at present, automatic meter reading is more and more important, the automatic meter reading rate is one of important indexes of metering, and the guarantee of the automatic meter reading rate is the premise of guaranteeing the correctness and stability of metering;

according to data statistics, the main reason influencing the automatic meter reading rate is that an auxiliary power supply is not installed in a site in a conditional mode, and the collection of the electric energy meter is interrupted due to the fact that a user has power failure, overhaul and fault power failure, so that the comprehensive error of the electric energy metering device is reduced to the maximum extent, fair and reasonable charging is achieved, and therefore the automatic meter reading system capable of preventing power failure is designed.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The invention is provided in view of the fact that the electric energy meter cannot be automatically read due to power failure in the existing electric energy metering management work.

Therefore, the invention aims to provide an automatic meter reading system capable of preventing power failure.

In order to solve the technical problems, the invention provides the following technical scheme: comprises an electric energy meter; the auxiliary power supply unit is arranged at the bottom of the electric energy meter and comprises an installation shell and an integrated control module, the integrated control module comprises a main control assembly, a mains supply detection assembly and a communication assembly, and the main control assembly, the mains supply detection assembly and the communication assembly are all arranged in the installation shell; and the remote control center is connected with the electric energy meter.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the main control assembly, the commercial power detection assembly and the communication assembly are connected with the electric energy meter, and the remote control center comprises a communication unit and a data processing unit which are connected with the electric energy meter.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the communication unit is connected with the electric energy meter through wireless communication, and the communication unit adopts a DFBM-CS224-DTR wireless communication module.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the electric energy meter is characterized in that a base is arranged at the bottom of the electric energy meter, clamping rods are arranged on two sides of the base, and openings are formed in the bottoms of the clamping rods.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the auxiliary power supply unit further comprises a locking module, an accommodating space K is arranged in the shell, locking spaces M are arranged at two ends of the shell in the horizontal direction, the locking module is arranged in the locking spaces M, the size diameter of the accommodating space K is larger than that of the base, and a battery accommodating bin is arranged at the bottom of the accommodating space K.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the locking module is including being located the first elastic component of locking space M bottom, first elastic component top is provided with the extrusion end be provided with the second elastic component in the horizontal straight line direction of first elastic component, second elastic component top is provided with the contact end be provided with Z type swing piece on the contact end, Z type swing piece one end with the contact end is connected, the other end be provided with crane type mouth with opening on the kelly is connected.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: be provided with on the locking space M inner wall and pass the spacing axle of Z type swing piece, Z type swing piece with spacing axle swings as the axle center, still be provided with the depression bar on the Z type swing piece, the depression bar with the second elastic component and the end of Z type swing piece is in on the same vertical direction, be provided with jack and screw hole on the shell horizontal direction both ends, the kelly passes the jack sets up in the vertical direction of first elastic component, be provided with on the depression bar with screw hole matched with screw thread.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the battery holding bin comprises a first holding bin and a second holding bin, the first holding bin and the second holding bin are arranged at the bottom of the holding space K in a mirror image mode, an anode touch panel and a cathode touch panel are arranged at two ends of the first holding bin and two ends of the second holding bin respectively, and guide rods are movably arranged on the anode touch panel on the first holding bin and the cathode touch panel on the second holding bin.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: still be provided with the integrated board in the accommodation space K, the integrated board sets up battery holding storehouse top, one side of integrated board be provided with guide arm complex baffle, be provided with V type guide slot on the baffle, guide arm one end with anodal touch panel and negative pole touch panel elastic connection, the other end of guide arm can be followed V type guide slot slides.

As a preferred scheme of the power-off prevention automatic meter reading system, the power-off prevention automatic meter reading system comprises the following steps: the main control assembly, the commercial power detection assembly and the communication assembly are arranged inside the integrated board, the other side of the integrated board is provided with a guide head, the base is arranged on the guide head, a plurality of groups of third elastic pieces are arranged at the joint of the first battery compartment and the second battery compartment, and a pressing plate is arranged at the top of each third elastic piece.

The invention has the beneficial effects that: according to the invention, a set of complete anti-outage automatic meter reading system is established for the conventional electric energy meter by installing the auxiliary power supply unit, so that the meter reading timeliness and the automatic meter reading rate of the electric energy meter during outage and outage can be effectively improved, and the accuracy of electric energy metering data is ensured; and the connection structure between the auxiliary power supply unit and the electric energy meter is simple and quick, and is convenient to disassemble.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic flow chart of the power-off prevention automatic meter reading system of the invention.

Fig. 2 is a logic diagram of a communication operation unit of the automatic power-off prevention meter reading system.

Fig. 3 is a schematic view of the overall structure of the auxiliary power supply unit of the automatic power-off prevention meter reading system of the invention.

Fig. 4 is an expanded schematic view of the overall structure of the auxiliary power supply unit of the power-off prevention automatic meter reading system of the invention.

Fig. 5 is a schematic cross-sectional view of the overall structure of the auxiliary power supply unit of the automatic power-off prevention meter reading system of the present invention.

Fig. 6 is an explosion schematic diagram of a battery accommodating chamber structure of the auxiliary power supply unit in the automatic power-off prevention meter reading system.

Fig. 7 is a schematic view of a connection structure of a guide rod and a guide plate of an auxiliary power supply unit in the automatic power-off prevention meter reading system of the invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1 to 3, an overall structure schematic diagram of an automatic power-off prevention meter reading system is provided, and as shown in fig. 1, the automatic power-off prevention meter reading system includes an electric energy meter 100, an auxiliary power supply unit 200, and a remote control center 300.

Specifically, the main structure of the invention includes an auxiliary power supply unit 200, the auxiliary power supply unit 200 is arranged at the bottom of the electric energy meter 100, the auxiliary power supply unit 200 includes an installation housing 201 and an integrated control module 202, the integrated control module 202 includes a main control component 202a, a commercial power detection component 202b and a communication component 202c, the main control component 202a, the commercial power detection component 202b and the communication component 202c are all arranged in the installation housing 201, and the remote control center 300 is connected with the electric energy meter 100; an STM32F030K6T6 singlechip is adopted as a preferred scheme of the main control assembly 202a, an SST-S7086 acquisition module is adopted as a preferred scheme of the commercial power detection assembly 202b, and an RS485 communication unit is adopted as a preferred scheme of the communication assembly 202 c.

Further, the main control module 202a, the utility power detection module 202b, and the communication module 202c are connected to the electric energy meter 100, the remote control center 300 includes a communication unit 301 and a data processing unit 302 connected to the electric energy meter 100, the utility power detection module 202b adopts an AD acquisition method, once the single-chip microcomputer receives a corresponding pulse signal, it is known that the utility power has been cut off, it is determined whether to provide an auxiliary power supply according to whether the single-chip microcomputer has received an automatic meter reading of the electric energy meter 100, that is, the zero-point data acquisition time per day, and when 485 time is performed between the RS485 communication unit and the electric energy meter 100 through a DL/T645 and 2007 communication protocol, the main control module 202a is used to control whether the auxiliary power supply unit 200 supplies power to the electric energy meter 100.

The specific working principle and the flow are as follows: the utility power detection assembly 202b first detects whether the electric energy meter 100 is powered on, when the utility power is not detected, the next process is entered, and 485 time synchronization is performed between the RS485 communication unit and the electric energy meter 100 through the DL/T645 and 2007 communication protocol, so that the electric energy meter 100 is at the time of timing meter reading every day when the main control assembly 202a issues the power-on command.

Example 2

Referring to fig. 3 to 7, this embodiment is different from the first embodiment in that: the auxiliary power supply unit 200 further comprises a locking module 203, an accommodating space K is arranged in the shell 201, locking spaces M are arranged at two ends of the shell 201 in the horizontal direction, the locking module 203 is arranged in the locking spaces M, the size diameter of the accommodating space K is larger than that of the base 101, and a battery accommodating bin 204 is arranged at the bottom of the accommodating space K.

Specifically, the locking module 203 includes a first elastic member 203a located at the bottom of the locking space M, a pressing end 203b is disposed at the top of the first elastic member 203a, a second elastic member 203c is disposed in the horizontal linear direction of the first elastic member 203a, a contact end 203d is disposed at the top of the second elastic member 203c, a Z-shaped swinging member 203e is disposed on the contact end 203d, one end of the Z-shaped swinging member 203e is connected with the contact end 203d, a crane-shaped nozzle 203f is disposed at the other end of the Z-shaped swinging member and connected with a notch on the clamping rod 102, and the locking module 203 is connected with the clamping rod 102 in a matching manner, wherein the locking module 203 is used for connecting the mounting unit 200 with the base 101 of the electric energy meter 100.

Furthermore, a limit shaft 203g penetrating through the Z-shaped swinging piece 203e is arranged on the inner wall of the locking space M, the Z-shaped swinging piece 203e swings with the limit shaft 203g as an axis, a pressure lever 203h is further arranged on the Z-shaped swinging piece 203e, the pressure lever 203h, a second elastic piece 203c and the tail end of the Z-shaped swinging piece 203e are in the same vertical direction, an insertion hole 201a and a threaded hole 201b are arranged at two ends of the shell 201 in the horizontal direction, the clamping rod 102 penetrates through the insertion hole 201a and is arranged in the vertical direction of the first elastic piece 203a, and a thread 203h-1 matched with the threaded hole 201b is arranged on the pressure lever 203 h; when the Z-shaped swinging member 203e and the second elastic member 203c are located on the same vertical line and the tail end thereof is pressed downwards, one end of the crane-shaped nozzle 203f is tilted and departs from the notch 102a, thereby achieving the purpose of unlocking; one preferable embodiment of the first elastic member 203a and the second elastic member 203c is a spring; the clamping rod 102 and the locking module 203 can be separated by arranging the threads 203h-1 on the pressure rod to be matched with the threaded hole 201b, so that unlocking is realized.

Further, the battery accommodating chamber 204 comprises a first accommodating chamber 204a and a second accommodating chamber 204b, and a No. 7 battery is installed in the battery accommodating chamber 203; the first accommodating chamber 204a and the second accommodating chamber 204b are arranged at the bottom of the accommodating space K in a mirror image manner, two ends of the first accommodating chamber 204a and the second accommodating chamber 204b are respectively provided with a positive electrode contact plate 204c and a negative electrode contact plate 204d, and guide rods 204e are movably arranged on the positive electrode contact plate 204c on the first accommodating chamber 204a and the negative electrode contact plate 204d on the second accommodating chamber 203d, wherein the guide rods 203 and the positive and negative electrode contact plates are made of conductive materials.

Furthermore, the accommodating space K is also provided with an integrated plate 205, the integrated plate 205 is arranged at the top of the battery accommodating bin 204, one side of the integrated plate 205 is provided with a guide plate 205a matched with the guide rod 204e, the guide plate 205a is provided with a V-shaped guide groove 205b, one end of the guide rod 204e is elastically connected with the positive contact plate 204c and the negative contact plate 204d, and the other end of the guide rod 204e can slide along the V-shaped guide groove 205 b; when the guide plate 205a is pressed down by the manifold 205, the opening at the bottom of the guide plate 205a is matched with the top metal head of the guide rod 204e, the top metal head of the guide rod 204e slides along the guide groove 205b along with the pressing down of the guide plate 205a until the top metal head is positioned in the top groove of the V-shaped guide groove 205b, and when the guide plate 205a is pressed down again, the guide rod 204e slides along the track on the right side of the V-shaped guide groove 205b to reach the initial entrance, so that the guide plate and the guide rod can be separated.

Still further, the main control assembly 202a, the utility power detection assembly 202b and the communication assembly 202c are arranged inside the integrated board 205, the other side of the integrated board 205 is provided with a guide head 205c, the base 101 is arranged on the guide head 205c, a plurality of sets of third elastic members 204f are arranged at the connection position of the first accommodating chamber 204a and the second accommodating chamber 204b, the top of the third elastic members 204f is provided with a pressing plate 204g, and the third elastic members 204f are springs; the guide 205c is used to transmit electric energy to the electric energy meter 100, and the specific operation manner may be that a socket is arranged on the base 101, and the guide 205c is inserted into the socket, so as to implement a circuit path, and the guide 203g is used to increase a contact surface between the integrated board 205 and the third elastic member 204f, so as to prevent the third elastic member 204f from being deformed, so as to affect the accuracy of the fit between the guide 204e and the positive and negative contact plates, and the spring is used to enable the guide 205a to rebound after being pressed for the second time, so that the guide 204e exits from the guide groove 205b on the guide 205a, so as to achieve the purpose of unlocking.

The specific working flow and principle are as follows: inserting the clamping rod 102 on the base 101 of the electric energy meter 100 along the insertion hole 201a, wherein a line is formed by three points between the pressing rod 203h and the Z-shaped swinging piece 203e as well as the second elastic piece 203c, but the second elastic piece 203c is in a normal state, when the pressing rod 203h gives downward pressure to the first elastic piece 203a, the crane-shaped mouth 203f extends into the notch 102a, and at the moment, the electric energy meter 100 is successfully connected with the shell 201; at this time, as the clamping rod 102 extends, the base 101 contacts the guide head 205c, and the manifold plate 205 moves downward, so that the guide rod 204e moves along the V-shaped guide groove 205b, and the third elastic member 204f is pressed; until the guide rod 204e is positioned in the groove at the upper end of the guide groove 205 b; when the pressing rod 203h is rotated downwards, the left end of the Z-shaped swinging member 203e is pressed, the crane-shaped mouth 203f tilts upwards to leave the notch 102a, and meanwhile, the housing 201 is pushed upwards, and the guide rod 204e exits along the other side of the V-shaped guide groove 205b, so that the unlocking conductive path and the separation effect between the electric energy meter 100 and the auxiliary power supply unit 200 are achieved.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.