阅读说明：本技术 一种机柜测试装置与方法 (Cabinet testing device and method ) 是由 朱荣坤 陈金龙 于 2019-09-06 设计创作，主要内容包括：本发明公开了一种机柜测试装置和方法,包括：铜排测试辅助工装,具有依次电性连接的弹片、引出电极、和信号线,其中弹片用于在铜排测试辅助工装插接到机柜时与机柜铜排电性连接；工业连接器测试辅助工装,具有母头插口、触头电极、和拨挡旋钮,其中母头插口用于在工业连接器测试辅助工装插接到机柜时与机柜工业连接器公头电性连接,母头插口构造为和触头电极电性连接并且具有相互之间成120度角的三相,拨挡旋钮构造为将母头插口三相中任选一相拨挡使得母头插口三相中的另外两相的电信号沿触头电极被导出；测试电路,电性连接到信号线和触头电极以接收和处理电信号并产生测试结果。本发明能够降低人工素质要求,提高工作效率和品控效果。(The invention discloses a device and a method for testing a cabinet, which comprise the following steps: the copper bar test auxiliary tool is provided with an elastic sheet, a leading-out electrode and a signal wire which are electrically connected in sequence, wherein the elastic sheet is used for being electrically connected with the cabinet copper bar when the copper bar test auxiliary tool is plugged into the cabinet; the industrial connector testing auxiliary tool is provided with a female socket, a contact electrode and a shifting knob, wherein the female socket is used for being electrically connected with a male connector of a cabinet industrial connector when the industrial connector testing auxiliary tool is plugged into a cabinet, the female socket is electrically connected with the contact electrode and has three phases forming an angle of 120 degrees with each other, and the shifting knob is used for shifting one of the three phases of the female socket so that electric signals of the other two phases of the three phases of the female socket are led out along the contact electrode; and the test circuit is electrically connected to the signal wire and the contact electrode to receive and process the electric signal and generate a test result. The invention can reduce the requirement of artificial quality and improve the working efficiency and the quality control effect.)

1. A cabinet testing device, comprising:

the copper bar testing auxiliary tool (1) is provided with an elastic sheet (12), a leading-out electrode (13) and a signal wire (14) which are electrically connected in sequence, wherein the elastic sheet (12) is used for being electrically connected with the cabinet copper bar when the copper bar testing auxiliary tool (1) is inserted into a cabinet;

the industrial connector testing auxiliary tool (2) is provided with a female socket (21), a contact electrode (23) and a shifting knob (24), wherein the female socket (21) is used for being electrically connected with a male connector of a cabinet industrial connector when the industrial connector testing auxiliary tool (2) is plugged into a cabinet, the female socket (21) is electrically connected with the contact electrode (23) and has three phases forming an angle of 120 degrees with each other, and the shifting knob (24) is used for shifting an optional phase of the three phases of the female socket (21) so that electric signals of the other two phases of the three phases of the female socket (21) are led out along the contact electrode (23);

a test circuit (3) electrically connected to the signal line (14) and the contact electrode (23) to receive and process electrical signals and generate a test result.

2. The device according to claim 1, characterized in that the copper bar test auxiliary tool (1) further comprises a handle (15), wherein the handle (15) is fixed on one side of the copper bar test auxiliary tool (1); the industrial connector testing auxiliary tool (2) is also provided with a handle similar to the handle (15).

3. The device according to claim 1, wherein the copper bar test auxiliary tool (1) is further provided with a copper bar fixing piece (11), and the copper bar fixing piece (11) is used for fixing the position where the copper bar test auxiliary tool (1) is connected with the cabinet copper bar and the relative position of each part in the copper bar test auxiliary tool (1); the industrial connector testing auxiliary tool (2) is further provided with an industrial connector fixing piece (22), and the industrial connector fixing piece (22) is used for fixing the position where the industrial connector testing auxiliary tool (2) is connected with the cabinet industrial connector and the relative position of each component in the industrial connector testing auxiliary tool (2).

4. The device according to claim 1, characterized in that the test circuit (3) has a receiving circuit connected to the signal line (14) and the contact electrode (23) for receiving electrical signals, a control circuit connected to the receiving circuit, an upper computer interface connected to the control circuit and uploading electrical signals and downloading test results, an output circuit connected to the control circuit and displaying and alarming according to test results.

5. The apparatus of claim 4, wherein the receiving circuit comprises a signal conversion circuit, a signal amplification circuit, and an analog-to-digital conversion circuit; the control circuit is a single chip microcomputer; the output circuit is connected to the display interface and the alarm interface to display the measured values and issue an alarm.

6. The device according to claim 4, characterized in that the test circuit (3) further has an input panel for setting the operating mode.

7. A cabinet testing method, comprising using the apparatus of claims 1-6 to perform the steps of:

determining that the industrial connector test aid (2) has been connected to the test circuit (3) and setting the test circuit (3) in a specific operating mode;

the auxiliary tool (2) for testing the industrial connector is held by hand and is inserted into the industrial connector of the cabinet, a shifting knob (24) is rotated, and each position of the shifting knob (24) waits for the test circuit (3) to output a measured value;

in response to the test circuit (3) outputting a measurement result and no alarm occurring, determining that the cabinet measurement value is normal and recording the normal measurement value;

in response to the test circuit (3) outputting a measurement and an alarm occurring, determining that a cabinet measurement is abnormal and recording the abnormal measurement.

8. The method of claim 7, wherein the specific operation mode is a short circuit measurement mode, and the measurement value is whether a short circuit exists; or the specific working mode is a line sequence measuring mode, and the measured value is whether the line sequence is correct or not.

9. The method according to claim 7, further comprising using the apparatus of claims 1-6 to perform the steps of:

determining that the copper bar test auxiliary tool (1) is connected to the test circuit (3) and setting the test circuit (3) in a specific working mode;

the copper bar test auxiliary tool (1) is held by hand and is inserted into the cabinet copper bar, and the test circuit (3) is waited for outputting a measured value;

in response to the test circuit (3) outputting a measurement result and no alarm occurring, determining that the cabinet measurement value is normal and recording the normal measurement value;

in response to the test circuit (3) outputting a measurement and an alarm occurring, determining that a cabinet measurement is abnormal and recording the abnormal measurement.

10. The method of claim 9, wherein the particular operating mode is a resistance measurement mode, and the measurement is a resistance measurement; or the specific operation mode is a voltage measurement mode, and the measurement value is a voltage measurement value.

Technical Field

The present invention relates to the field of testing, and more particularly, to a device and a method for testing a rack.

Background

With the increase of the production quantity of the cabinet, professional convenient tools are more and more important in the process production, and when artificial errors occur in the production process of the cabinet, short circuit, low resistance, low voltage and line sequence errors all affect the normal production test of the cabinet, so that the normal delivery can not be realized, and even the server is damaged. Obtaining accurate results is particularly important based on current production conditions.

At present, the cabinet can meet the following standards under the condition of full allocation: the resistance value of the cabinet is more than 85 omega, the resistance value of the single node is more than or equal to 3800 omega, and the resistance value of the power supply cabinet is more than or equal to 600 omega. However, in the prior art, the tool used for cabinet testing is a universal multimeter, and a tester needs to master the standard, but cannot intuitively judge whether the production requirement is met through an instrument.

Aiming at the problems of high requirement on equipment cabinet testing labor, low efficiency and difficult management and control in the prior art, no effective solution is available at present.

Disclosure of Invention

In view of this, an object of the embodiments of the present invention is to provide a device and a method for testing a cabinet, which can reduce requirements for quality of workers and improve work efficiency and quality control effect.

In view of the above object, a first aspect of the embodiments of the present invention provides a device for testing a cabinet, including:

the copper bar test auxiliary tool is provided with an elastic sheet, a leading-out electrode and a signal wire which are electrically connected in sequence, wherein the elastic sheet is used for being electrically connected with the cabinet copper bar when the copper bar test auxiliary tool is plugged into the cabinet;

the industrial connector testing auxiliary tool is provided with a female socket, a contact electrode and a shifting knob, wherein the female socket is used for being electrically connected with a male connector of a cabinet industrial connector when the industrial connector testing auxiliary tool is plugged into a cabinet, the female socket is electrically connected with the contact electrode and has three phases forming an angle of 120 degrees with each other, and the shifting knob is used for shifting an optional phase of the three phases of the female socket so that electric signals of the other two phases of the three phases of the female socket are led out along the contact electrode;

and the test circuit is electrically connected to the signal wire and the contact electrode to receive and process the electric signal and generate a test result.

In some embodiments, the copper bar test auxiliary tool further comprises a handle, and the handle is fixed on one side of the copper bar test auxiliary tool; the industrial connector testing aid also has a handle similar to the handle.

In some embodiments, the copper bar test auxiliary tool further comprises a copper bar fixing part, and the copper bar fixing part is used for fixing the position where the copper bar test auxiliary tool is connected with the cabinet copper bar and the relative position of each part in the copper bar test auxiliary tool; the industrial connector testing auxiliary tool is further provided with an industrial connector fixing piece, and the industrial connector fixing piece is used for fixing the position where the industrial connector testing auxiliary tool is connected with the cabinet industrial connector and the relative position of each component in the industrial connector testing auxiliary tool.

In some embodiments, the test circuit has a receiving circuit connected to the signal line and the contact electrode to receive the electrical signal, a control circuit connected to the receiving circuit, an upper computer interface connected to the control circuit and uploading the electrical signal and downloading the test result, and an output circuit connected to the control circuit and displaying and alarming according to the test result.

In some embodiments, the receiving circuit includes a signal conversion circuit, a signal amplification circuit, and an analog-to-digital conversion circuit; the control circuit is a singlechip; the output circuit is connected to the display interface and the alarm interface to display the measured values and issue an alarm.

In some embodiments, the test circuit also has an input panel for setting the operating mode.

A second aspect of the embodiments of the present invention provides a cabinet testing method, including using the foregoing apparatus to perform the following steps:

determining that an industrial connector test aid has been connected to a test circuit and setting the test circuit in a particular operating mode;

the handheld industrial connector test auxiliary tool is plugged into the cabinet industrial connector and rotates the shifting knob, and a test circuit outputs a measured value at each position of the shifting knob;

responding to the test circuit to output the measurement result and not generating an alarm, determining that the measured value of the cabinet is normal and recording the normal measured value;

in response to the test circuit outputting the measurement and an alarm occurring, determining that the cabinet measurement is abnormal and recording the abnormal measurement.

In some embodiments, the specific operation mode is a short circuit measurement mode, and the measured value is whether a short circuit exists; or the specific working mode is a line sequence measuring mode, and the measured value is whether the line sequence is correct or not.

In some embodiments, further comprising performing the following steps using the aforementioned apparatus:

determining that the copper bar test auxiliary tool is connected to the test circuit and setting the test circuit in a specific working mode;

the handheld copper bar test auxiliary tool is inserted into the cabinet copper bar and waits for the test circuit to output a measured value;

responding to the test circuit to output the measurement result and not generating an alarm, determining that the measured value of the cabinet is normal and recording the normal measured value;

in response to the test circuit outputting the measurement and an alarm occurring, determining that the cabinet measurement is abnormal and recording the abnormal measurement.

In some embodiments, the particular mode of operation is a resistance measurement mode, and the measurement is a resistance measurement; or the specific operation mode is a voltage measurement mode, and the measured value is a voltage measured value.

The invention has the following beneficial technical effects: according to the equipment cabinet testing device and method provided by the embodiment of the invention, the elastic sheet is electrically connected with the equipment cabinet copper bar when the copper bar testing auxiliary tool is inserted into the equipment cabinet, and the elastic sheet, the leading-out electrode and the signal line are sequentially electrically connected so that an electric signal of the equipment cabinet copper bar is led out along the signal line; the female socket is electrically connected with a male connector of the industrial connector of the equipment cabinet when the auxiliary testing tool of the industrial connector is plugged into the equipment cabinet, the female socket is provided with three phases forming an angle of 120 degrees with each other, and the shifting knob shifts one of the three phases of the female socket so that electric signals of the other two phases of the three phases of the female socket are led out along the contact electrode; the technical scheme that the test circuit is electrically connected to the signal line and the contact electrode to receive and process the electric signal and generate a test result can reduce the requirement of manual quality and improve the working efficiency and the quality control effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a copper bar test auxiliary tool of the cabinet testing device provided by the invention;

fig. 2 is a schematic structural diagram of an industrial connector test auxiliary tool of the cabinet testing device provided by the invention;

fig. 3 is a schematic structural diagram of a test circuit of the cabinet test apparatus provided in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

In view of the above, a first aspect of the embodiments of the present invention provides an embodiment of a cabinet testing apparatus capable of improving work efficiency and quality control effect. Fig. 1 and fig. 2 are schematic structural diagrams of a part of components of a cabinet testing device provided by the invention.

As shown in fig. 1 and 2, the cabinet testing apparatus includes:

the copper bar testing auxiliary tool 1 is provided with an elastic sheet 12, a leading-out electrode 13 and a signal line 14, wherein the elastic sheet 12 is electrically connected with the cabinet copper bar when the copper bar testing auxiliary tool 1 is inserted into a cabinet, and the elastic sheet 12, the leading-out electrode 13 and the signal line 14 are sequentially electrically connected to lead out an electric signal of the cabinet copper bar along the signal line 14;

the industrial connector testing auxiliary tool 2 is provided with a female socket 21, a contact electrode 23 and a shifting knob 24, wherein the female socket 21 is electrically connected with a male connector of the industrial connector of a cabinet when the industrial connector testing auxiliary tool 2 is plugged into the cabinet, the female socket 21 is electrically connected with the contact electrode 23, the female socket 21 is provided with three phases forming an angle of 120 degrees with each other, and the shifting knob 24 shifts an optional phase of the three phases of the female socket 21 so that electric signals of the other two phases of the three phases of the female socket 21 are led out along the contact electrode 23;

and a test circuit 3 electrically connected to the signal line 14 and the contact electrode 23 to receive and process the electrical signal and generate a test result.

The female socket 21 has three phases, which are respectively connected to the positive, negative and ground levels of the industrial connector. The dial knob 24 is used to null out one of the three phases during the measurement so that the other two are input into the test circuit for testing without having to reconnect the female socket. The included angle of the positive, negative and transition parts in contact with the contacts is 120 degrees, the included angle of the two contacts is also 120 degrees, a handheld device is added, the outgoing line and the tool connecting end are directly welded on the outgoing line, the testing equipment connecting end is designed by referring to a universal meter interface, and universality is improved. The convenient three-to-two switching can increase the control performance of the test process, and the matched line sequence test tool enables the test to be more convenient, so that a worker without a technical foundation can judge whether the cabinet meets the production requirement according to visual prompt, and the effect of quickly positioning the production problem is achieved.

The various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as software or hardware depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments of the present invention.

In some embodiments, the copper bar testing auxiliary tool 1 further comprises a handle 15, the handle 15 is fixed on one side of the copper bar testing auxiliary tool 1, and the handle 15 is convenient for a tester to hold and provides an industrial fool-proof effect; the industrial connector test aid 2 also has a handle similar to handle 15.

In some embodiments, the copper bar testing auxiliary tool 1 further comprises a copper bar fixing part 11, and the copper bar fixing part 11 is used for fixing the position where the copper bar testing auxiliary tool 1 is connected with the cabinet copper bar and the relative position of each component in the copper bar testing auxiliary tool 1; the industrial connector test auxiliary tool 2 further comprises an industrial connector fixing part 22, and the industrial connector fixing part 22 is used for fixing the position where the industrial connector test auxiliary tool 2 is connected with the cabinet industrial connector and the relative position of each component in the industrial connector test auxiliary tool 2.

As shown in fig. 3, the test circuit 3 has a receiving circuit connected to the signal line 14 and the contact electrode 23 to receive an electric signal, a control circuit connected to the receiving circuit and controlling the overall operation of the test circuit 3, an upper computer interface connected to the control circuit and uploading the electric signal and downloading the test result, and an output circuit connected to the control circuit and displaying and alarming according to the test result.

In some embodiments, the receiving circuit includes a signal conversion circuit, a signal amplification circuit, and an analog-to-digital conversion circuit; the control circuit is a singlechip; the output circuit is connected to the display interface and the alarm interface to display the measured values and issue an alarm.

In some embodiments, the test circuit 3 also has an input panel for setting the operating mode.

The embodiment of the invention is innovated by referring to the principle of a universal meter, the testing equipment only keeps resistance and direct-current voltage testing in function, a line sequence judging circuit is added, an alarm indicating lamp and a buzzer are added, and a judging program is added for comparison and judgment. Due to the fact that testing requirements of different scenes exist, the same interface as the universal meter can be reserved to conveniently correspond to different testing scenes. The program can be stored in the upper computer and can be burnt through the upper computer interface, loading optimization and change of the test program can be completed according to test requirements, and the application range and maintainability of the test program are guaranteed. In addition, the tool design is carried out by referring to the copper bar and the industrial connector of the cabinet, and the measuring points are switched through the industrial connector testing auxiliary tool to facilitate the acquisition of equipment. Copper bar side test auxiliary fixtures adopts Power clip design theory to increase and blocks copper bar when handheld design is convenient for the test and guarantee measuring convenience, stability and continuity. The industrial connector tool converts three measuring points into two measuring points, and then the shift operation is adopted to be matched with a testing instrument to complete the open short circuit test and the line sequence test between the three points.

As can be seen from the above embodiments, the cabinet testing device provided by the embodiment of the invention is electrically connected with the cabinet copper bar through the elastic sheet when the copper bar testing auxiliary tool is inserted into the cabinet, and the elastic sheet, the extraction electrode and the signal line are sequentially electrically connected so that the electric signal of the cabinet copper bar is led out along the signal line; the female socket is electrically connected with a male connector of the industrial connector of the equipment cabinet when the auxiliary testing tool of the industrial connector is plugged into the equipment cabinet, the female socket is provided with three phases forming an angle of 120 degrees with each other, and the shifting knob shifts one of the three phases of the female socket so that electric signals of the other two phases of the three phases of the female socket are led out along the contact electrode; the technical scheme that the test circuit is electrically connected to the signal line and the contact electrode to receive and process the electric signal and generate a test result can reduce the requirement of manual quality and improve the working efficiency and the quality control effect.

In view of the above, a second aspect of the embodiments of the present invention provides an embodiment of a cabinet testing method capable of improving work efficiency and quality control effect. The cabinet testing method comprises the following steps of using the device:

determining that the industrial connector test aid 2 has been connected to the test circuit 3 and setting the test circuit 3 in a particular mode of operation;

the handheld industrial connector test auxiliary tool 2 is inserted into the cabinet industrial connector and rotates the shift knob 24, and the test circuit 3 waits for outputting a measured value at each position of the shift knob 24;

in response to the test circuit 3 outputting the measurement result and no alarm occurring, determining that the cabinet measurement value is normal and recording the normal measurement value;

in response to the test circuit 3 outputting the measurement and an alarm occurring, a determination is made that the cabinet measurement is abnormal and an abnormal measurement is recorded.

In some embodiments, the specific operation mode is a short circuit measurement mode, and the measured value is whether a short circuit exists; or the specific working mode is a line sequence measuring mode, and the measured value is whether the line sequence is correct or not.

For short circuit measurement, for example, the shift knobs on the tool are sequentially rotated to test the open short circuit conditions between positive and negative, between negative and ground, and between ground and positive. When the test result is larger than the standard value, the industrial connector is free of short circuit, and the display module displays the test value; when the test result is less than the standard value, the industrial connector is indicated to be in short circuit, the display module displays the test value, the alarm lamp is on, and the buzzer sounds. For the line sequence measurement, the gear shifting knob on the tool can be sequentially rotated to respectively test the positive position, the negative position and the ground position, the positive position, the negative position and the ground position respectively correspond to the red light emitting diode, the blue light emitting diode and the yellow light emitting diode, if the line sequence is correct, the light emitting diodes with corresponding colors can be lighted, and if the line sequence is incorrect, the alarm lamp is lighted, and the buzzer sounds.

In a further embodiment, the method further comprises using the aforementioned apparatus to perform the steps of:

determining that the copper bar test auxiliary tool 1 is connected to the test circuit 3 and setting the test circuit 3 in a specific working mode;

the handheld copper bar test auxiliary tool 1 is inserted into the cabinet copper bar and waits for the test circuit 3 to output a measured value;

in response to the test circuit 3 outputting the measurement result and no alarm occurring, determining that the cabinet measurement value is normal and recording the normal measurement value;

in response to the test circuit 3 outputting the measurement and an alarm occurring, a determination is made that the cabinet measurement is abnormal and an abnormal measurement is recorded.

In some embodiments, the particular mode of operation is a resistance measurement mode, and the measurement is a resistance measurement; or the specific operation mode is a voltage measurement mode, and the measured value is a voltage measured value.

For example, for resistance measurement, when the test result is greater than the standard value, the cabinet resistance value is normal, and the display module displays the test value; when the test result is smaller than the standard value, the cabinet resistance value is represented to be abnormal, the display module displays the test value, the alarm lamp is on, and the buzzer sounds. Voltage measurements are similar.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like. Embodiments of the computer program may achieve the same or similar effects as any of the preceding method embodiments to which it corresponds.

As can be seen from the above embodiments, in the cabinet testing method provided by the embodiments of the present invention, the elastic sheet is electrically connected to the cabinet copper bar when the copper bar testing auxiliary tool is inserted into the cabinet, and the elastic sheet, the extraction electrode, and the signal line are sequentially electrically connected so that the electrical signal of the cabinet copper bar is led out along the signal line; the female socket is electrically connected with a male connector of the industrial connector of the equipment cabinet when the auxiliary testing tool of the industrial connector is plugged into the equipment cabinet, the female socket is provided with three phases forming an angle of 120 degrees with each other, and the shifting knob shifts one of the three phases of the female socket so that electric signals of the other two phases of the three phases of the female socket are led out along the contact electrode; the technical scheme that the test circuit is electrically connected to the signal line and the contact electrode to receive and process the electric signal and generate a test result can reduce the requirement of manual quality and improve the working efficiency and the quality control effect.

The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items. The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.