阅读说明：本技术 一种双面光伏发电系统 (Double-sided photovoltaic power generation system ) 是由 杨琴 杨茂隆 辛国文 李玉刚 吴星 张洁 马桃 应欣 逯海伦 于 2020-11-26 设计创作，主要内容包括：本申请实施例公开了一种双面光伏发电系统,用于增加太阳能的接受率。本申请实施例系统包括：双面光伏板、移动舵机、光伏支撑架、光伏固定架、光照信息采集器以及控制器；所述光伏固定架上设置有限位点,通过所述限位点固定所述双面光伏板；所述光伏支撑架第一端固定在地面上,所述光伏支撑架第二端连接着所述光伏固定架；所述移动舵机分别连接着所述光伏支撑架与所述光伏固定架,所述移动舵机用于改变所述光伏支撑架与所述光伏固定架之间的位置角度；所述光照信息采集器设置于所述光伏固定架上,所述光照信息采集器的信息收集面与所述双面光伏板平行；所述控制器分别连接所述光照信息采集器和移动舵机。(The embodiment of the application discloses a double-sided photovoltaic power generation system which is used for increasing the acceptance rate of solar energy. The system of the embodiment of the application comprises: the device comprises a double-sided photovoltaic panel, a movable steering engine, a photovoltaic support frame, a photovoltaic fixing frame, an illumination information collector and a controller; limiting points are arranged on the photovoltaic fixing frame, and the double-sided photovoltaic panel is fixed through the limiting points; the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected with the photovoltaic fixing frame; the movable steering engine is respectively connected with the photovoltaic support frame and the photovoltaic fixing frame and used for changing the position angle between the photovoltaic support frame and the photovoltaic fixing frame; the illumination information collector is arranged on the photovoltaic fixing frame, and an information collecting surface of the illumination information collector is parallel to the double-sided photovoltaic panel; the controller is respectively connected with the illumination information collector and the movable steering engine.)

1. A bifacial photovoltaic power generation system, comprising:

the device comprises a double-sided photovoltaic panel, a movable steering engine, a photovoltaic support frame, a photovoltaic fixing frame, an illumination information collector and a controller;

limiting points are arranged on the photovoltaic fixing frame, and the double-sided photovoltaic panel is fixed through the limiting points;

the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected with the photovoltaic fixing frame;

the movable steering engine is respectively connected with the photovoltaic support frame and the photovoltaic fixing frame and used for changing the position angle between the double-sided photovoltaic power generation system and the sun;

the illumination information collector is arranged on the photovoltaic fixing frame;

the controller is respectively connected with the illumination information collector and the movable steering engine.

2. The bifacial photovoltaic power generation system of claim 1, further comprising a base;

the photovoltaic support frame is fixed on the ground through the base.

3. The bifacial photovoltaic power generation system of claim 2, further comprising a horizontal steering engine;

the horizontal steering engine is arranged on the base and used for rotating the double-sided photovoltaic power generation system.

4. The bifacial photovoltaic power generation system of claim 1, wherein said mobile steering engine is connected to said photovoltaic support frame and said photovoltaic mount, respectively, comprising:

the first end of the movable steering engine is fixed on the photovoltaic fixing frame, the second end of the movable steering engine is fixed on the photovoltaic supporting frame, the movable steering engine, the photovoltaic supporting frame and the movable steering engine form a triangle, and the movable steering engine is used for shrinking the length of the movable steering engine, so that the angle between the photovoltaic fixing frame and the photovoltaic supporting frame is changed.

5. The bifacial photovoltaic power generation system of any one of claims 1 to 4, wherein the first end of the photovoltaic support frame is fixed to the ground and the second end of the photovoltaic support frame is connected to the photovoltaic mount, comprising:

the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected with the photovoltaic fixing frame through an inclination clamping plate.

6. The bifacial photovoltaic power generation system of any one of claims 1 to 4, wherein the illumination information collector is disposed on the photovoltaic mount and comprises:

the illumination information collector is arranged on the photovoltaic fixing frame through a limiter, so that the illumination information collector is parallel to the double-sided photovoltaic panel.

7. The bifacial photovoltaic power generation system of any of claims 1-4, wherein the illumination information collector comprises an illumination collection housing, an illumination collection module;

the illumination acquisition module is positioned in the illumination acquisition shell and is connected with the controller;

the illumination collection shell is fixed on the photovoltaic fixing frame, so that the illumination collection module is parallel to the double-sided photovoltaic panel.

8. The bifacial photovoltaic power generation system of claim 7, wherein the illumination collection module comprises a circuit board and a photoresistor;

the circuit board is provided with a plurality of interfaces, and the photoresistor is arranged in the interfaces at preset interfaces and angles;

the circuit board is connected with the controller.

9. The bifacial photovoltaic power generation system of claim 7, wherein the illumination collection module comprises a circuit board and four photo resistors;

the four photoresistors are symmetrically distributed on the circuit board and are coupled, and each photoresistor and the circuit board form a preset angle;

the circuit board is connected with the controller.

10. The bifacial photovoltaic power generation system of any one of claims 1 to 4, wherein the controller is comprised of a single-chip microcomputer.

Technical Field

The embodiment of the application relates to the field of solar energy, in particular to a double-sided photovoltaic power generation system.

Background

In recent years, the photovoltaic industry has advanced and developed rapidly. Photovoltaic power generation systems are one of the main research directions of the current new energy production mode.

At present, the most widely applied photovoltaic power generation system is a fixed single-sided photovoltaic power generation system, and because only one side of a single-sided photovoltaic component can receive solar radiation, the intensity of the solar radiation received every day is limited, and the single-sided photovoltaic component is limited by a fixed support, in most of time, the included angle between a photovoltaic panel and a solar ray is not an optimal power angle, and the power generation efficiency of the component is limited to a great extent.

Namely, the current photovoltaic power generation system has the problem of low solar energy acceptance rate.

Disclosure of Invention

The embodiment of the application provides a two-sided photovoltaic power generation system, includes:

the device comprises a double-sided photovoltaic panel, a movable steering engine, a photovoltaic support frame, a photovoltaic fixing frame, an illumination information collector and a controller;

limiting points are arranged on the photovoltaic fixing frame, and the double-sided photovoltaic panel is fixed through the limiting points;

the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected with the photovoltaic fixing frame;

the movable steering engine is respectively connected with the photovoltaic support frame and the photovoltaic fixing frame and used for changing the position angle between the double-sided photovoltaic power generation system and the sun;

the illumination information collector is arranged on the photovoltaic fixing frame;

the controller is respectively connected with the illumination information collector and the movable steering engine.

Optionally, the double-sided photovoltaic power generation system further comprises a base;

the photovoltaic support frame is fixed on the ground through the base.

Optionally, the double-sided photovoltaic power generation system further comprises a horizontal steering engine;

the horizontal steering engine is arranged on the base and used for rotating the double-sided photovoltaic power generation system.

Optionally, the mobile steering engine is connected respectively the photovoltaic support frame with the photovoltaic mount, include:

the first end of the movable steering engine is fixed on the photovoltaic fixing frame, the second end of the movable steering engine is fixed on the photovoltaic supporting frame, the movable steering engine, the photovoltaic supporting frame and the movable steering engine form a triangle, and the movable steering engine is used for shrinking the length of the movable steering engine, so that the angle between the photovoltaic fixing frame and the photovoltaic supporting frame is changed.

Optionally, the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected to the photovoltaic mount, including:

the first end of the photovoltaic support frame is fixed on the ground, and the second end of the photovoltaic support frame is connected with the photovoltaic fixing frame through an inclination clamping plate.

Optionally, the illumination information collector set up in on the photovoltaic mount, include:

the illumination information collector is arranged on the photovoltaic fixing frame through a limiter, so that the illumination information collector is parallel to the double-sided photovoltaic panel.

Optionally, the illumination information collector includes an illumination collecting housing and an illumination collecting module;

the illumination acquisition module is positioned in the illumination acquisition shell and is connected with the controller;

the illumination collection shell is fixed on the photovoltaic fixing frame, so that the illumination collection module is parallel to the double-sided photovoltaic panel.

Optionally, the illumination collection module includes a circuit board and a photoresistor;

the circuit board is provided with a plurality of interfaces, and the photoresistor is arranged in the interfaces at preset interfaces and angles;

the circuit board is connected with the controller.

Optionally, the illumination collection module includes a circuit board and four photoresistors;

the four photoresistors are symmetrically distributed on the circuit board and are coupled, and each photoresistor and the circuit board form a preset angle;

the circuit board is connected with the controller.

Optionally, the controller is composed of a single chip microcomputer.

According to the technical scheme, the embodiment of the application has the following advantages:

the illumination information collector collects the current sunlight illumination state and transmits the current sunlight illumination state to the controller, and the controller analyzes whether the current sunlight illumination angle has a deviation larger than a preset value. When the deviation larger than the preset value exists, the controller controls the movable steering engine to move. Because the movable steering gear is respectively connected with the photovoltaic support frame and the photovoltaic fixing frame, the movable steering gear can change the included angle between the photovoltaic support frame and the photovoltaic fixing frame, so that the double-sided photovoltaic panel moves along with the photovoltaic fixing frame, the angle between the double-sided photovoltaic panel and the sun is changed, and the sunlight receiving efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a bifacial photovoltaic power generation system;

FIG. 2 is a schematic diagram of the distribution of the structure of the photo-resistor on the circuit board;

FIG. 3 is a schematic diagram of an automatic control flow of a controller singlechip;

FIG. 4 is a schematic front view of a mounting structure of a bifacial photovoltaic power generation system;

fig. 5 is a schematic side view of a fixing structure of the bifacial photovoltaic power generation system.

Detailed Description

The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.

The embodiment of the application provides a double-sided photovoltaic power generation system which is used for increasing the acceptance rate of solar energy.

Referring to fig. 1 to 5, an embodiment of the present application provides a double-sided photovoltaic power generation system, including:

the device comprises a double-sided photovoltaic panel 1, a movable steering engine 2, a photovoltaic support frame 3, a photovoltaic fixing frame 4, an illumination information collector 5 and a controller 6;

limiting points are arranged on the photovoltaic fixing frame 4, and the double-sided photovoltaic panel 1 is fixed through the limiting points;

the first end of the photovoltaic support frame 3 is fixed on the ground, and the second end of the photovoltaic support frame 3 is connected with the photovoltaic fixing frame 4;

the movable steering engine 2 is respectively connected with the photovoltaic support frame 3 and the photovoltaic fixing frame 4, and the movable steering engine 2 is used for changing the position angle between the double-sided photovoltaic power generation system and the sun;

the illumination information collector 5 is arranged on the photovoltaic fixing frame 4;

the controller 6 is respectively connected with the illumination information collector 5 and the movable steering engine 2.

In this embodiment, the illumination information collector 5 collects the current sunlight irradiation state and transmits the current sunlight irradiation state to the controller 6, and the controller 6 analyzes whether the current sunlight irradiation angle has a deviation larger than a preset value. When the deviation larger than the preset value exists, the controller 6 controls the mobile steering engine 2 to move. Because the movable steering gear 2 is respectively connected with the photovoltaic support frame 3 and the photovoltaic fixing frame 4, the movable steering gear 2 can change the included angle between the photovoltaic support frame 3 and the photovoltaic fixing frame 4, so that the double-sided photovoltaic panel 1 moves along with the photovoltaic fixing frame 4, the angle between the double-sided photovoltaic panel 1 and the sun is changed, and the sunlight receiving efficiency is improved.

Optionally, the double-sided photovoltaic power generation system further comprises a base;

photovoltaic support frame 3 is fixed in subaerially through the base, increases two-sided photovoltaic power generation system's stability for prevent that strong wind or other factors from causing the damage to two-sided photovoltaic power generation system, the base has increased whole two-sided photovoltaic power generation system's basal area.

Optionally, the double-sided photovoltaic power generation system further comprises a horizontal steering engine;

the horizontal steering engine is arranged on the base, the base can be connected with the horizontal steering engine except for stabilizing the double-sided photovoltaic system, the double-sided photovoltaic power generation system is rotated, the light receiving angle of the double-sided photovoltaic power generation system is increased, and the sunlight receiving efficiency is increased, so that solar energy can be absorbed no matter the sunlight surface is directly opposite to the sunlight surface or the sunlight surface is back to the sunlight surface.

Optionally, remove steering wheel 2 and be connected photovoltaic support frame 3 and photovoltaic mount 4 respectively, include:

the first end of the movable steering gear 2 is fixed on the photovoltaic fixing frame 4, the second end of the movable steering gear 2 is fixed on the photovoltaic support frame 3, the movable steering gear 2, the photovoltaic support frame 3 and the movable steering gear form a triangle, and the movable steering gear 2 is used for shrinking the length of the movable steering gear, so that the angle between the photovoltaic fixing frame 4 and the photovoltaic support frame 3 is changed. The movable steering engine 2 is a telescopic motor, and the side length of the side corresponding to the triangular movable steering engine 2 formed by the three is increased or shortened by changing the degree of the movable steering engine, so that the angle between the photovoltaic support frame 3 and the photovoltaic fixing frame 4 is changed, the photovoltaic support frame 3 is perpendicular to the ground all the time, the position of the photovoltaic fixing frame 4 is changed, the angle of the double-sided photovoltaic panel 1 facing the sun is changed, and the sunlight receiving efficiency is improved.

Optionally, the first end of photovoltaic support frame 3 is fixed subaerial, and photovoltaic mount 4 is being connected to 3 second ends of photovoltaic support frame, includes:

the first end of the photovoltaic support frame 3 is fixed on the ground, and the second end of the photovoltaic support frame 3 is connected with the photovoltaic fixing frame 4 through an inclination clamping plate. The photovoltaic support frame 3 is connected for rotatable coupling with photovoltaic mount 4, and photovoltaic mount 4 can rotate certain angle, increases the removal angle scope of two-sided photovoltaic board 1, and the inclination splint are used for limiting this removal angle's scope, have improved sunlight receiving efficiency.

Optionally, the illumination information collector 5 is arranged on the photovoltaic fixing frame 4, and includes:

the illumination information collector 5 is arranged on the photovoltaic fixing frame 4 through a limiter, so that the illumination information collector 5 is parallel to the double-sided photovoltaic panel 1. The illumination information collector 5 needs to collect the current illumination angle, but usually the signal collector cannot directly provide the angle information, and only can provide indirect information, in this embodiment, the illumination information collector 5 transmits a plurality of electric signals generated by obtaining sunlight to the controller 6, and the controller 6 performs analysis and action according to the electric signals. The illumination information collector 5 needs to be parallel to the double-sided photovoltaic panel 1, so that collected signals are consistent with sunlight received by the current double-sided photovoltaic panel 1.

Optionally, the illumination information collector 5 includes an illumination collecting housing and an illumination collecting module;

the illumination collection module is positioned in the illumination collection shell, the illumination collection module is connected with the controller 6, and the illumination collection shell is fixed on the photovoltaic fixing frame 4 so that the illumination collection module is parallel to the double-sided photovoltaic panel 1.

The illumination information collector 5 is provided with a collecting shell for better absorbing sunlight and is connected to an illumination collecting module, the illumination module transmits a plurality of electric signals generated by acquiring the sunlight to the controller 6, and the controller 6 analyzes and acts according to the electric signals. The illumination information collector 5 needs to be parallel to the double-sided photovoltaic panel 1, so that collected signals are consistent with sunlight received by the current double-sided photovoltaic panel 1.

Optionally, the illumination collection module includes a circuit board and a photoresistor;

the circuit board is provided with a plurality of interfaces, the photoresistors are arranged in the interfaces at preset interfaces and angles, and the circuit board is connected with the controller 6.

Optionally, the illumination collection module includes a circuit board and four photo resistors, the four photo resistors are symmetrically distributed on the circuit board and coupled, each photo resistor forms a preset angle with the circuit board, and the circuit board is connected with the controller 6.

Referring to fig. 2, in the present embodiment, the included angle of the photo-resistor can be calculated as follows: the photoresistors are symmetrically distributed on the circuit board, and the included angle between the photoresistors and the circuit board is alpha. The tilt angle is related to two indexes, namely a controllable light tracing area (representing the included angle between the normal line of the circuit board before light tracing and an axis and meeting the controllable maximum angle (namely the maximum angle capable of light tracing), and an error of light tracing (representing the angle between the normal line of the circuit board plane and the sunlight when the light tracing is finished), and the other index is poor when one index is improved due to the inconsistency of the two indexes, so that 4 photoresistors are symmetrically distributed on the circuit board, and the included angle between the adopted photoresistors and the circuit board is 45 degrees.

Optionally, in this embodiment, the included angle of the photo resistor is calculated by using the following formula 1:

wherein: alpha and eta represent normalized weight coefficients of theta and delta, respectively, and represent the importance degrees of theta and delta. And theta and delta have inconsistency, it is necessary to take the reciprocal of delta. Finally, the inclination angle can be obtained by traversing alpha. Considering the actual test of the whole device, the distribution of 4 photo-resistors is finally used to be approximately 45 degrees with the plate surface, and the principle is explained as follows: as shown in fig. 2, the distribution of the 4 photo-resistors is approximately 45 ° to the plate surface, if the sunlight is directly from the 45 ° upper left corner, the left photo-resistor is facing the sunlight, but the right photo-resistor is facing away from the sunlight. Therefore, the resistance values of the photosensitive resistors in the group are greatly different, so that the difference between the collected voltage and the expected voltage is large, the steering engine can be controlled to adjust the angle of the receiving plate to enable the receiving plate to face the sun, and the adjusting effect is good.

When the included angle between the photoresistor and the solar power generation panel is 0 degree, the normal direction of the panel of the circuit board forms a larger angle with the light direction after the circuit board finishes light tracing, the light tracing error is large, and the effect is poor. When the photoresistor is perpendicular to the surface of the power generation board, namely forms an angle of 90 degrees with the board surface, the light following area range is reduced, and the light following effect is poor. In the embodiment, when the distribution of the 4 photoresistors and the board surface form an appropriate value in the range of 0-90 degrees, the target of the accuracy of the circuit board in the light tracking area and the light tracking can be ensured to be reached.

Optionally, the controller 6 is composed of a single chip microcomputer.

Referring to fig. 3, in this embodiment, a sunlight signal irradiates on a photoresistor, a circuit in which the photoresistor is located is a bridge circuit, the sunlight signal is converted into a resistance value change of the resistor, so that a voltage signal in the circuit is changed, the voltage signal is acquired as a digital signal through an AD of a 51 single chip microcomputer in a controller, and the digital signal is converted into a control signal of a mobile steering engine or a horizontal steering engine through the 51 single chip microcomputer, that is, a PWM signal, and finally converted into a rotation signal of the mobile steering engine or the horizontal steering engine.

The controller 6 is designed based on system hardware circuitry. Including programming during signal acquisition, conversion and control. Meanwhile, maintainability and high efficiency need to be considered in the process of designing codes.

The software design mainly comprises two processes of voltage information AD acquisition and steering engine rotation driving. There are mainly 3 aspects considered in the software implementation: AD acquisition and data processing, steering engine control and dead zone jitter elimination.

Optionally, in this embodiment, the AD acquisition uses AD0832 to convert data serially, and converts a voltage value obtained by voltage division of the photoresistor into a digital value.

Optionally, in this embodiment, the steering engine control adopts an SG90 steering engine to realize the rotation of the double-sided photovoltaic panel, and the rotation of the SG90 is related to the PWM wave. And comparing the digital value acquired by the AD with a reference value corresponding to the expected voltage to obtain the rotation direction of the steering engine, generating corresponding PWM (pulse-width modulation) waves and driving the steering engine to rotate.

Optionally, in the embodiment, in the dead zone elimination process, when the acquisition voltage given by the AD is greater than the expected voltage, the steering engine or the horizontal steering engine is moved to steer the double-sided photovoltaic panel to the side where the acquisition voltage is reduced; when the voltage acquired by the AD is smaller than the expected voltage, the voltage is vice versa, so that the sunlight tracking function is realized. But the control precision of the movable steering engine or the horizontal steering engine is limited, and the device can have severe shaking phenomenon at a stable position. In this embodiment, the angle of each rotation of the adopted mobile steering engine or horizontal steering engine is 3 degrees, and in the vicinity of a stable position, a voltage value acquired before the steering engine rotates once is larger than an expected voltage, and a voltage value acquired after the steering engine rotates is smaller than the expected voltage, so that the device can continuously shake back and forth near the expected position. Setting the expected voltage as a dead zone interval range, namely enabling the collected voltage to be larger than the upper limit threshold voltage of the dead zone, and rotating the light following plate; the collected voltage is less than the dead zone lower limit threshold voltage, and the light tracing plate rotates in the opposite direction. Therefore, the device can be ensured not to shake at a stable position, and the dead zone interval is smaller, so that the sun alignment of the light-following plate is not influenced.

Because the input signal of the whole system is the position of sunlight, the signal is converted into a pressure difference signal by using a bridge circuit, and the signal is used for judging whether the rotation state of the steering engine is forward rotation or reverse rotation or stop motion by software programming, and then the steering engine is controlled to correspondingly move for an angle. And then repeatedly judging the rotating state of the movable steering engine or the horizontal steering engine until the expected target is reached, namely the double-sided photovoltaic panel and the solar ray are in a vertical state. Meanwhile, the tracking of light rays in two directions, namely the control of the horizontal steering engine or the movable steering engine is considered, so that once circulation is realized, the circuit board rotates twice, and the horizontal steering engine and the movable steering engine respectively rotate by an angle.

Optionally, in this embodiment, the current sunlight irradiation state is mainly collected by the illumination information collector 5 and transmitted to the controller 6, the controller 6 controls the mobile steering engine 2, and the photovoltaic fixing frame 4 moves along with the mobile steering engine 2, so that the double-sided photovoltaic panel 1 moves towards the direction of the preset angle with the sunlight, and the sunlight receiving efficiency is improved.

In this embodiment, the double-sided photovoltaic panel 1 receives direct sunlight on the front side to generate power, and absorbs reflected light from the background (i.e., reflected light from transmitted light), ground reflected light, and atmospheric scattered light on the back side. The roof type photovoltaic power generation panel is greatly limited by space, and if the double-sided panel is adopted, the light receiving area of the double-sided photovoltaic panel 1 can be increased under the existing occupied space, so that the power generation capacity is improved. And moreover, the irradiation directions of the double-sided photovoltaic panel and the sun can be changed by moving the steering engine and the horizontal steering engine, so that the purpose of absorbing excessive solar energy is achieved.

The movable steering engine 2 is used for ensuring that the circuit board rotates in the horizontal direction and the vertical direction, and the movable steering engine 2 can be driven to rotate by gears and a conveyer belt. Meanwhile, a base is added below the horizontal steering engine to ensure the stability of the whole double-sided photovoltaic power generation system.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit specific mounting orientations of the respective members or components.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.