阅读说明：本技术 标定辅助装置、光电感烟探测器及标定方法 (Calibration auxiliary device, photoelectric smoke detector and calibration method ) 是由 徐奂 于 2019-05-09 设计创作，主要内容包括：标定辅助装置,包括一个反光件及一个滤光片。反光件具有一个反光表面,反光件能够设置于光电感烟探测器,使得反光表面置于感烟探测器的发光元件的光发射路径上且将来自发光元件的光线反射向感烟探测器的光接收元件。滤光片能够设置于光接收元件的光接收路径上,并对反光表面反射的光线进行过滤,使其强度在光接收元件的感测范围内。本发明提供的标定辅助装置,通过反射与过滤的结合模拟烟雾环境使光电感烟探测器获得测量值,能够方便对光电感烟探测器进行标定,且标定辅助装置易于制造,降低了整体成本。另外本发明还提供了能够安装标定辅助装置实现标定的光电感烟探测器及其标定方法。(The calibration auxiliary device comprises a reflecting piece and an optical filter. The light reflecting member has a light reflecting surface, and the light reflecting member can be disposed on the photoelectric smoke detector so that the light reflecting surface is disposed on a light emitting path of a light emitting element of the smoke detector and reflects light from the light emitting element toward a light receiving element of the smoke detector. The optical filter can be arranged on a light receiving path of the light receiving element and filters light reflected by the reflecting surface, so that the intensity of the light is in a sensing range of the light receiving element. The calibration auxiliary device provided by the invention can simulate a smoke environment through the combination of reflection and filtration to enable the photoelectric smoke detector to obtain a measured value, can conveniently calibrate the photoelectric smoke detector, is easy to manufacture, and reduces the overall cost. In addition, the invention also provides a photoelectric smoke detector capable of being provided with the calibration auxiliary device to realize calibration and a calibration method thereof.)

1. Calibration assistance device mountable on a photoelectric smoke detector including a light emitting element and a light receiving element, the calibration assistance device comprising:

a reflector (40) having a reflective surface (42), said reflector (40) being positionable on said photoelectric smoke detector such that said reflective surface (42) is positioned in a light emission path of said light emitting elements (10,20) of said photoelectric smoke detector and reflects light from said light emitting elements toward said light receiving element (30) of said photoelectric smoke detector; and

and the optical filter (50) can be arranged on a light receiving path of the light receiving element (30) and filters the light reflected by the light reflecting surface (42) so that the intensity of the filtered light is within the sensing range of the light receiving element (30).

2. Calibration aid according to claim 1, wherein the light-reflecting surface (42) of the light-reflecting member (40) is curved.

3. Calibration aid according to claim 2, wherein the light-reflecting surface (42) of the light-reflecting member (40) is an inner parabolic curve, an inner cylindrical curve or an inner conical curve.

4. Calibration assistance device according to claim 1, wherein the reflector (40) and the filter (50) are of one-piece construction, and the reflective surface (42) is a reflective coating of the surface of the reflector (40).

5. Calibration assistance device according to claim 4, wherein the light reflecting member (40) is an arc-shaped sheet structure connected to the filter (50).

6. A calibration aid according to claim 1 wherein the calibration aid further comprises a cover (60), the light reflecting member (40) and the optical filter (50) are disposed on the cover (60), and the cover (60) can be disposed on a labyrinth base (70) of the optical smoke detector and enclose a calibration cavity (72) with the labyrinth base (70); when the cover body (60) is covered on the labyrinth base (70) of the photoelectric smoke detector, the light-emitting elements (10,20), the light-receiving element (30), the light-reflecting piece (40) and the optical filter (50) are all positioned in the calibration cavity (72).

7. Calibration assistance device according to claim 6, wherein the reflector (40) and the filter (50) are detachably arranged to the cover (60).

8. The calibration assistance device of claim 7, further comprising:

a fixing post (82) detachably inserted through the cover body (60) and capable of forming an interference fit with the cover body (60);

and the shielding part (84) is connected with the fixed column (82) and can cover a gap between the fixed column (82) and the cover body (60) when the fixed column (82) penetrates through the cover body (60), and the reflector (40) and the optical filter (50) are fixed on the shielding part (84).

9. A photoelectric smoke detector capable of calibration in cooperation with the calibration assistance device according to any one of claims 1 to 8, the photoelectric smoke detector including a light emitting element and a light receiving element, wherein the photoelectric smoke detector further includes:

the controller (90) is respectively in signal connection with the light-emitting elements (10 and 20) and the light-receiving element (30), the controller (90) can control the light-emitting elements (10 and 20) to emit light, the controller (90) can also control the light-receiving element (30) to receive the light reflected and filtered by the calibration auxiliary device so as to generate a measured value, and the controller (90) can also realize calibration of the photoelectric smoke detector according to the measured value.

10. The photoelectric smoke detector according to claim 9, wherein the controller (90) calibrates the photoelectric smoke detector by adjusting the light emitting parameters of the light emitting elements (10,20) to achieve a predetermined target value of the measured value; or

The controller (90) calibrates a specific proportion of the measured values as a threshold value.

11. The photoelectric smoke detector according to claim 10, wherein the controller (90) changes a pulse width of a drive signal of the light emitting element (10,20) by adjusting a drive circuit of the light emitting element (10,20), and adjusts an amount of light emission of the light emitting element (10,20) by the pulse width.

12. Calibration method for a photoelectric smoke detector for calibrating a photoelectric smoke detector to which a calibration aid according to any one of claims 1 to 8 can be attached, comprising the steps of:

when the calibration assisting device is arranged in the photoelectric smoke detector,

controlling the light emitting elements (10,20) to emit light;

controlling the light receiving element (30) to receive the light reflected and filtered by the calibration auxiliary device so as to generate a measured value;

comparing said measured value with a target value; and

if the measured value is not equal to the target value, the light-emitting element (10,20) and/or the light-receiving element (30) is/are adjusted and the aforementioned steps are repeated.

13. Calibration method according to claim 12, wherein the step of adjusting the light emitting element (10,20) and/or the light receiving element (30) comprises:

adjusting a lighting parameter of the lighting element (10, 20).

14. A calibration method according to claim 13, wherein the step of adjusting the light emitting parameters of the light emitting elements (10,20) comprises:

the pulse width of a drive signal for driving the light emitting elements (10,20) is adjusted, thereby adjusting the amount of light emission of the light emitting elements (10, 20).

Technical Field

The invention relates to a calibration auxiliary device for calibration, in particular to a calibration auxiliary device. In addition, the invention also relates to a photoelectric smoke detector capable of realizing calibration by matching with the calibration auxiliary device and a calibration method thereof.

Background

A scattering type photoelectric smoke detector is detection equipment commonly used in the field of fire fighting, and detects fire by using scattering effect of particles in gas on detection light. The photoelectric smoke detector has an optical detection chamber, also called a labyrinth or labyrinth chamber, for providing a detection environment. The optical detection cavity is internally provided with a light-emitting element and a light-receiving element. The photoelectric smoke detector needs to be calibrated before leaving a factory so as to meet the smoke sensitivity specified by relevant standards. With the use of photoelectric smoke detectors, such as the introduction of dust, the detectors require periodic maintenance to ensure that they are able to function properly. During the maintenance of the detector, the labyrinth chamber needs to be cleaned and the detector recalibrated. Existing calibration methods typically utilize smoke boxes or diffusers to simulate a real smoke environment. When the smoke box is used, the detector needs to be disassembled and returned to the factory for re-calibration, so that the operation is inconvenient. In addition, the smoke box has the problems of pollution and precision. When the scatterer is used for calibration, the manufacturing process of the scatterer is complex and the yield is low, so that the calibration method has higher cost.

Disclosure of Invention

The invention aims to provide a calibration auxiliary device which can conveniently calibrate a photoelectric smoke detector and can reduce the cost of a calibration process.

It is another object of the present invention to provide a photoelectric smoke detector suitable for installing the calibration assisting device, so that the photoelectric smoke detector can be conveniently calibrated on site, and the cost of the calibration process can be reduced.

Another object of the present invention is to provide a calibration method for a photoelectric smoke detector, which can conveniently calibrate the photoelectric smoke detector and reduce the cost of the calibration process.

The calibration auxiliary device can be arranged on a photoelectric smoke detector. The photoelectric smoke detector comprises a light-emitting element and a light-receiving element. The calibration auxiliary device comprises a reflecting piece and an optical filter. The light reflecting member has a light reflecting surface such that the light reflecting member is disposed in a light emitting path of a light emitting element of the photoelectric smoke detector and reflects light from the light emitting element toward a light receiving element of the photoelectric smoke detector. The optical filter can be arranged on a light receiving path of the light receiving element and filters the light reflected by the reflecting surface, so that the intensity of the filtered light is in the sensing range of the light receiving element.

The calibration auxiliary device provided by the invention firstly reflects the light emitted by the light emitting element to the light receiving element through the reflecting piece, and then filters the reflected light through the filter. The combination of reflection and filtering simulates the smoke environment so that the photoelectric smoke sensing detector can obtain the measured value and carry out calibration. The calibration aid can be removably positioned within the optical detection chamber. In addition, compared with a scatterer, the reflecting piece and the optical filter have simpler manufacturing process and lower manufacturing cost, so that the overall cost of the calibration process can be effectively reduced.

In a further exemplary embodiment of the calibration aid, the light-reflecting surface of the reflector is curved. The light emitted by the light emitting element can be reflected and converged to the light receiving element through the curved surface, so that the measurement value precision is improved.

In yet another exemplary embodiment of the photoelectric smoke detector, the light reflecting surface of the light reflecting member is an inner parabolic curve, an inner cylindrical curve, or an inner conical curve. The design of the surfaces can be adjusted according to requirements, so that the purpose of reflecting the light of the light-emitting element to the receiving element is effectively achieved, and meanwhile, the surfaces are convenient to process and manufacture, and the processing cost can be reduced.

In another exemplary embodiment of the calibration aid, the reflector and the optical filter are of an integral structure, and the reflective surface is a reflective coating on the surface of the reflector. Therefore, the processing cost of the reflecting piece and the optical filter is further reduced, and the integrated structure is more convenient to operate and use.

In another exemplary embodiment of the photoelectric smoke detector, the light reflecting member is an arc-shaped sheet structure connected to the optical filter. The structure is manufactured in an integrated manner, and the processing cost is further reduced.

In another exemplary embodiment of the calibration assisting apparatus, the calibration assisting apparatus further includes a cover, and the light reflecting member and the light filter are disposed on the cover. The lid can cover the maze base of locating photoelectric smoke detector and enclose into the demarcation chamber of an isolation with the maze base, and when the maze base of photoelectric smoke detector was located to the lid, light-emitting component, light-receiving element, reflection of light spare and light filter all were located and mark the intracavity. Therefore, the calibration process of the photoelectric smoke detector is more convenient and faster.

In another exemplary embodiment of the calibration aid, the reflector and the filter are detachably arranged on the cover. Thereby facilitating maintenance and replacement of the reflectors and filters.

In another exemplary embodiment of the calibration assistance device, the calibration assistance device further includes a fixing column and a shielding portion. The fixed column detachably wears to locate the lid to can form interference fit with the lid. The shielding part is connected with the fixed column and can cover a gap between the fixed column and the cover body when the fixed column penetrates through the cover body, and the reflecting piece and the light filter are respectively fixed on the shielding part. Therefore, the light reflecting piece and the light filter are convenient to disassemble, and the isolation of the calibration cavity and external light is ensured.

The invention also provides a photoelectric smoke detector which can realize calibration by matching with the calibration auxiliary device, and the photoelectric smoke detector comprises a light-emitting element, a light-receiving element and a controller. The controller is signal connection light emitting component and light receiving element respectively, and the controller can control light emitting component emission light, and the controller can also control light receiving element and receive the light after maring auxiliary device reflection and filtering and then generate the measured value, and the controller can also realize the demarcation to the photoelectric smoke detector according to the measured value. The photoelectric smoke detector provided by the invention can be matched with a removable calibration auxiliary device to execute a calibration process. Therefore, the photoelectric smoke detector which is installed on the site can realize the site calibration without being disassembled. In addition, the manufacturing process of the calibration auxiliary device is simpler and the manufacturing cost is lower, so that the overall cost of the calibration process can be effectively reduced.

In yet another exemplary embodiment of the photoelectric smoke detector, the controller adjusts the light emitting parameters of the light emitting elements to achieve a predetermined target value, thereby calibrating the photoelectric smoke detector. Or the controller calibrates a specific proportion of the measured values to the threshold value.

In still another exemplary embodiment of the photoelectric smoke detector, the controller changes a pulse width of a drive signal of the light emitting element by adjusting a drive circuit of the light emitting element, and adjusts an amount of light emission of the light emitting element by the pulse width.

The invention also provides a calibration method for the photoelectric smoke detector, which is used for calibrating the photoelectric smoke detector capable of being provided with the calibration auxiliary device and comprises the following steps:

when the calibration auxiliary device is arranged in the photoelectric smoke detector,

controlling the light emitting element to emit light;

controlling a light receiving element to receive the light reflected and filtered by the calibration auxiliary device so as to generate a measured value;

comparing the measured value with a target value;

and if the measured value is not equal to the target value, adjusting the light-emitting element and/or the light-receiving element and repeatedly executing the steps.

In a further exemplary embodiment of the calibration method, the step of adjusting the light emitting element and/or the light receiving element, in particular the controller, the light emitting element comprises: the light emitting parameters of the light emitting element are adjusted.

In another exemplary embodiment of the calibration method, the step of adjusting the luminescence parameter of the luminescent element comprises:

the pulse width of a drive signal for driving the light emitting element is adjusted, thereby adjusting the amount of light emission of the light emitting element.

The above features, technical features, advantages and implementations of the calibration assisting device, the photoelectric smoke detector and the calibration method will be further described in the following detailed description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic configuration diagram for explaining an exemplary embodiment of the calibration assistance apparatus.

Fig. 2 is a schematic diagram for explaining the use of the calibration assistance apparatus.

Fig. 3 is a flow chart of a calibration method of the photoelectric smoke detector.

Fig. 4 is a schematic structural view of another exemplary embodiment of the calibration assistance apparatus.

Fig. 5 is a schematic view of a use state of the calibration assisting apparatus.

Fig. 6 is an exploded view of the calibration assistance device shown in fig. 4.

Description of the reference symbols

10,20 light emitting element

30 light receiving element

40 reflecting piece

42 reflective surface

50 optical filter

60 cover body

70 labyrinth base

72 calibration cavity

82 fixed column

84 shield portion

90 controller

Detailed Description

In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

Fig. 1 is a schematic diagram illustrating an exemplary embodiment of a calibration assistance device. Referring to fig. 1, the calibration aid can be removably positioned within the optical detection chamber, i.e. the labyrinth. Fig. 2 is a schematic diagram for explaining the use of the calibration assistance apparatus. Referring to fig. 2 in conjunction with fig. 1, the calibration aid can be mounted to a photoelectric smoke detector. The photoelectric smoke detector includes light emitting elements 10,20 and a light receiving element 30. Although the number of the light emitting elements 10,20 is two in the exemplary embodiment, it is not limited thereto. The number of light emitting elements in other exemplary embodiments may be set according to actual requirements, and may of course include only one light emitting element. The calibration assisting device comprises a reflecting piece 40 and a filter 50. The reflective member 40 has a reflective surface 42. The calibration assisting means can be disposed in the optical detection cavity of the photoelectric smoke detector such that the light reflecting surface 42 of the light reflecting member 40 is disposed on the light emitting path of the light emitting elements 10,20 of the photoelectric smoke detector and reflects the light from the light emitting elements 10,20 toward the light receiving element 30 of the photoelectric smoke detector. The optical filter 50 can be disposed on the light receiving path of the light receiving element 30 and filter the light reflected by the light reflecting surface 42, so that the intensity of the filtered light is within the sensing range of the light receiving element 30.

The calibration auxiliary device can be used for calibrating products before the photoelectric smoke detector leaves a factory and also can be used for calibrating products after the photoelectric smoke detector leaves the factory for maintenance. In the product calibration process before leaving the factory, a calibration worker can place the calibration auxiliary device in the photoelectric smoke detector and run a preset calibration program to control the light-emitting element and the receiving element to complete related calibration work. For calibration in post-factory maintenance, calibration can also be achieved by controlling the light emitting element and the receiving element by a field implantation program. Optionally, a calibration program may be embedded in the photoelectric smoke detector itself, and the calibration may be implemented by matching with a calibration auxiliary device.

Fig. 2 schematically illustrates an embodiment in which a calibration process is required to be used with the photoelectric smoke detector and the calibration method provided by the present invention. Referring to fig. 2, the photoelectric smoke detector provided by the present invention includes light emitting elements 10,20, a light receiving element 30 and a controller 90. The controller 90 is connected to the light emitting elements 10 and 20 and the light receiving element 30 by signals. The controller 90 can control the light emitting elements 10,20 to emit light. The emitted light reaches the light receiving element 30 after being reflected by the reflecting member 40 and filtered by the filter 50. The controller 90 controls the light receiving element 30 to receive the arriving light and generate a measurement value, which may be an analog value or a digital value. The controller 90 is also capable of calibrating the photoelectric smoke detector based on the measured values.

In an exemplary embodiment, the controller 90 adjusts the light emitting parameters of the light emitting elements to achieve a predetermined target value, thereby calibrating the photoelectric smoke detector. Specifically, the controller 90 changes the pulse width of the drive signal of the light emitting element by adjusting the drive circuit of the light emitting element 10,20, and adjusts the light emission amount of the light emitting element by the pulse width. The target value is a value determined by calculation according to parameters of the photoelectric smoke detector and the calibration auxiliary device, and calibration of the photoelectric smoke detector is achieved when the light receiving element 30 receives light and generates a measurement value reaching the target value. In other exemplary embodiments, the light emitting parameters of the light emitting elements can be adjusted in other manners, such as adjusting the amplitude of the driving signal.

In another exemplary embodiment, when the controller 90 calibrates the photo-inductive smoke detector according to the measured value, the controller 90 may calibrate a specific proportion of the measured value after the calibration assistance device is placed as the smoke alarm threshold. During calibration, the measured values in the case of no smoke (without calibration aids) can be regarded as background values. The measured value when the calibration auxiliary device is arranged is the smoke condition. Thus, a certain proportion of the measured values when the calibration aid is installed can be set as the alarm threshold value, so that an early and timely alarm can be given in the presence of smoke.

Fig. 3 is a flow chart exemplarily illustrating a first calibration method of the photoelectric smoke detector. Referring to fig. 3, the calibration method includes:

when the calibration auxiliary device is arranged in the photoelectric smoke detector,

s1: the light emitting elements 10,20 are controlled to emit light.

S2: the light receiving element 30 is controlled to receive the light reflected and filtered by the calibration assisting device to generate a measured value.

S3: the measured value is compared with a target value.

And if the measured value is equal to the target value, ending the process.

If the measured value is not equal to the target value,

s4: the light emitting elements 10,20 and/or the light receiving element 30 are adjusted and steps S1 to S3 are repeatedly performed.

In an exemplary embodiment, adjusting the light emitting elements and/or the light receiving elements, in particular the controller, adjusts a light emitting parameter of the light emitting elements 10,20, such as a driving signal amplitude, frequency or duty cycle. In a specific embodiment, the step of adjusting the light emitting parameters of the light emitting elements 10,20 comprises adjusting the pulse width of a driving signal for driving the light emitting elements 10,20, thereby adjusting the amount of light emitted by the light emitting elements 10, 20. However, the method is not limited to the embodiment, and in other exemplary embodiments, the light emitting amount of the light emitting elements 10 and 20 may be adjusted in other manners (for example, adjusting the amplitude, the frequency, and the like).

In the calibration assisting apparatus provided in the exemplary embodiment, the light emitted from the light emitting element 10 and the light emitting element 20 is reflected to the light receiving element 30 by the reflector, and then the reflected light is filtered by the filter. The smoke environment was simulated by a combination of reflection and filtration and measurements were obtained. In the above embodiment, the calibration assisting device can be removably placed in the optical detection cavity, which is convenient for operation. In addition, compared with a scatterer, the reflecting piece and the optical filter have simpler manufacturing process and lower manufacturing cost, so that the overall cost of the calibration process can be effectively reduced. In addition, the on-site calibration can be realized by matching with related calibration programs, and the smoke sensor does not need to be detached and the factory return calibration is not needed.

In an exemplary embodiment, referring to fig. 1, the light reflecting surface 42 of the light reflector 40 is curved. The light emitted by the light emitting element can be reflected and converged to the light receiving element through the curved surface, so that the measurement value precision is improved. In the illustrative embodiment, the curved surface is specifically an inner cylindrical curved surface, and the inner cylindrical curved surface is convenient to process and manufacture, so that the processing cost can be reduced. However, without limitation, in other exemplary embodiments, light reflecting surface 42 may also be an inner parabolic curve, an inner conical curve, or other curve that reflects and focuses light onto a light receiving element.

In an exemplary embodiment, referring to fig. 1, the light reflecting member 40 and the optical filter 50 are of an integral structure, and the light reflecting surface is a light reflecting coating on the surface of the light reflecting member 40. Therefore, the processing cost of the light reflecting piece 40 and the optical filter 50 is further reduced, and the light reflecting piece 40 and the optical filter 50 can be detached simultaneously conveniently due to the integrated structure. However, without being limited thereto, in other exemplary embodiments, the light reflecting member 40 and the optical filter 50 may be separate independent components. Further, the light reflecting member 40 is an arc-shaped sheet structure connected to the optical filter 50. The structure is manufactured in an integrated mode, materials can be saved due to the shape, and machining cost is further reduced.

Fig. 4 is a schematic structural view of another exemplary embodiment of the calibration assistance apparatus. Referring to fig. 4, the same parts of the calibration assisting apparatus as those of fig. 1 will not be described again, except that the calibration assisting apparatus shown in fig. 4 further includes a cover 60. The light reflecting member 40 and the optical filter 50 are disposed on the cover 60. Fig. 5 is a schematic diagram of a use state of the calibration assisting apparatus, referring to fig. 5, the cover body 60 can be covered on the labyrinth base 70 of the photoelectric smoke detector and enclose an isolated calibration cavity 72 with the labyrinth base 70, and when the cover body 60 is covered on the labyrinth base 70 of the photoelectric smoke detector, the light emitting element 10, the light emitting element 20, the light receiving element 30, the light reflecting member 40 and the optical filter 50 are respectively located in the calibration cavity 72. The cover body 60 is covered on the labyrinth base 70 of the photoelectric smoke detector to form a calibration cavity 72, so that the inductance smoke detector can be quickly calibrated, and the calibration process is more convenient and faster. Meanwhile, by means of the structure, the layout of the photoelectric smoke detector in a labyrinth cavity does not need to be changed in order to consider the spatial arrangement of the calibration auxiliary device.

Fig. 6 is an exploded view of the calibration assistance device shown in fig. 4 and 5. Referring to fig. 6, in the exemplary embodiment, the light reflecting member 40 and the optical filter 50 are detachably provided to the cover body 60, thereby facilitating maintenance and replacement of the light reflecting member and the optical filter. Specifically, the calibration assisting device includes three fixing posts 82 and a shielding portion 84. The fixing post 82 is detachably inserted through and fixed to the cover 60 and can form an interference fit with the cover 60. The shielding portion 84 is connected to the fixing post 82 and can cover a gap between the fixing post 82 and the cover body 60 when the fixing post 82 penetrates through the cover body 60, so that light is prevented from entering the calibration cavity 72 through the gap. The reflector 40 and the filter 50 are fixed to the shielding portion 84, respectively. Although the number of the fixing posts 82 is three in the exemplary embodiment, the number is not limited thereto, and in other exemplary embodiments, the number of the fixing posts may be adjusted according to actual needs, and of course, only one fixing post 82 may be included. Thereby facilitating the removal of the reflector 40 and the filter 50 while ensuring the isolation of the calibration cavity 72 from external light. However, the invention is not limited thereto, and in other exemplary embodiments, the light reflecting member 40 and the optical filter 50 may be detachably disposed on the cover 60 in other manners.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description of a series of embodiments is merely a specific description of possible examples of the present invention, and is not intended to limit the scope of the invention, and equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.