阅读说明：本技术 监测装置、清管器的定位方法和定位系统及存储介质 (Monitoring device, positioning method and positioning system of pipe cleaner and storage medium ) 是由 赵连玉 赵吉诗 王子缘 陈婷 李燕 古纪莹 曾玥 黄世键 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种监测装置、清管器的定位方法和定位系统及存储介质。其中,监测装置,安装在管道上,监测装置用于监测管道内携带有磁性件的清管器,监测装置包括：信号采集模块,用于获取来自磁性件的磁信号并根据磁信号生成电压信号；通信模块,用于与终端设备通信；控制模块,分别连接至信号采集模块和通信模块,控制模块用于获取来自信号采集模块的电压信号,并将电压信号转换为数字信号,控制模块还用于将数字信号通过通信模块发送至终端设备,以使终端设备显示清管器的运行情况。通过该安装在管道上的监测装置,用户无需使用信号接收装置在管道沿线等候,就能监测清管器的顺利通过,从而简单、方便地监测定位清管器。(The invention discloses a monitoring device, a positioning method and a positioning system of a pipe cleaner and a storage medium. Wherein, monitoring devices installs on the pipeline, and monitoring devices is used for monitoring the interior dredging pipe ware that has the magnetic part of carrying of pipeline, and monitoring devices includes: the signal acquisition module is used for acquiring a magnetic signal from the magnetic part and generating a voltage signal according to the magnetic signal; the communication module is used for communicating with the terminal equipment; the control module is connected to the signal acquisition module and the communication module respectively, is used for acquiring the voltage signal from the signal acquisition module and converting the voltage signal into a digital signal, and is also used for transmitting the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipe cleaner. Through this monitoring devices who installs on the pipeline, the user need not to use signal receiver to wait along the pipeline, just can monitor passing through smoothly of dredging pipe ware to monitor location dredging pipe ware simply, conveniently.)

1. A monitoring device for mounting on a pipeline for monitoring a pig carrying magnetic members within the pipeline, the monitoring device comprising:

the signal acquisition module is used for acquiring a magnetic signal from the magnetic part and generating a voltage signal according to the magnetic signal;

the communication module is used for communicating with the terminal equipment;

the control module is connected to the signal acquisition module and the communication module respectively, and is used for acquiring the voltage signal from the signal acquisition module and converting the voltage signal into a digital signal, and the control module is also used for transmitting the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipe cleaner.

2. The monitoring device of claim 1, wherein the signal acquisition module comprises a sensor and a signal acquisition circuit, the sensor, the signal acquisition circuit and the control module are sequentially connected, the sensor is used for acquiring the magnetic signal and sending the magnetic signal to the signal acquisition circuit, and the signal acquisition circuit outputs the voltage signal to the control module according to the magnetic signal.

3. The monitoring device according to claim 1, wherein the control module includes a filter circuit and an analog-to-digital conversion circuit, the signal acquisition module, the filter circuit and the analog-to-digital conversion circuit are sequentially connected, the filter circuit is configured to filter the voltage signal and send the voltage signal to the analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is configured to convert the filtered voltage signal into the digital signal.

4. A monitoring device according to any one of claims 1 to 3, wherein the monitoring device is mounted on a test or marker post of the pipeline.

5. A positioning system for a pipe pig, comprising a pipe pig carrying a magnetic member, a terminal device in communication with the communication module, and a monitoring device according to any one of claims 1 to 4.

6. A method of locating a pig for use in a control module in a monitoring device mounted on a pipeline for monitoring the pig carrying magnetic elements within the pipeline, the monitoring device further comprising:

the signal acquisition module is connected to the control module and is used for acquiring a magnetic signal from the magnetic piece;

the communication module is connected to the control module and is used for communicating with terminal equipment;

the positioning method comprises the following steps:

acquiring a voltage signal from the signal acquisition module, wherein the voltage signal is obtained by the signal acquisition module according to the magnetic signal of the magnetic part;

converting the voltage signal into a digital signal;

and sending the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipeline pig.

7. The positioning method according to claim 6, wherein the signal acquisition module comprises a sensor and a signal acquisition circuit, the sensor, the signal acquisition circuit and the control module are connected in sequence, and the voltage signal is generated by the signal acquisition circuit after the sensor acquires the magnetic signal from the magnetic member.

8. The method of claim 6, wherein said converting the voltage signal to a digital signal comprises:

filtering the voltage signal to obtain the filtered voltage signal;

and converting the voltage signal after filtering into the digital signal.

9. A control module, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing the method of positioning a pig according to any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that computer-executable instructions are stored for performing the method of positioning a pig according to any one of claims 6 to 8.

Technical Field

The present invention relates to the field of cleaning of pipelines, and in particular to a monitoring device, a method for positioning a pipe pig, a positioning system for a pipe pig, a control module and a computer readable storage medium.

Background

The long-distance pipeline is one of the main modes for transporting the medium such as petroleum, natural gas, finished oil and the like at home and abroad, but because the medium such as oil gas and the like contains impurities, silt, rust, deposited water and the like are easily accumulated in the pipeline, the pipeline needs to be cleaned regularly. However, the devices such as the pipe cleaner and the detector are mechanical devices, and if large deformation defects such as pits, elliptical deformation, wrinkles and the like are encountered during operation in the pipeline, the blockage is easily caused, the normal transmission of a medium is affected, and even the local pressure is too high, so that pipeline safety accidents are caused, and therefore the devices such as the pipe cleaner and the detector must be tracked and positioned.

The traditional tracking and positioning method for the pipeline cleaner and the detector in the oil and gas pipeline is that personnel carry a detector signal receiving device, before the pipeline cleaning and detection operation, the personnel wait at each point along the pipeline, and the signal receiving device receives signals, so that the pipeline cleaner and the detector are proved to pass through the point smoothly. However, this method is greatly affected by weather conditions, and requires a large amount of manpower and material resources, which brings great inconvenience to the cleaning and inspection work.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a monitoring device, a positioning method of a pipe cleaner, a positioning system of the pipe cleaner, a control module and a computer readable storage medium, which can simply and conveniently monitor and position the pipe cleaner.

In a first aspect, an embodiment of the present invention provides a monitoring device, which is installed on a pipeline, and is used for monitoring a pig carrying a magnetic member in the pipeline, and the monitoring device includes: the signal acquisition module is used for acquiring a magnetic signal from the magnetic part and generating a voltage signal according to the magnetic signal; the communication module is used for communicating with the terminal equipment; the control module is connected to the signal acquisition module and the communication module respectively, and is used for acquiring the voltage signal from the signal acquisition module and converting the voltage signal into a digital signal, and the control module is also used for transmitting the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipe cleaner.

The monitoring device according to the embodiment of the first aspect of the invention has at least the following advantages:

when the monitoring device is used, when a pipe cleaner with a magnetic part passes through the corresponding position where the monitoring device is installed on a pipeline, the signal acquisition module can acquire a magnetic signal from the magnetic part and generate a voltage signal according to the magnetic signal, then the control module converts the voltage signal into a digital signal and sends the digital signal to terminal equipment through the communication module, so that the terminal equipment displays the running condition of the pipe cleaner. Through this monitoring devices who installs on the pipeline, the user need not to use signal receiver to wait along the pipeline, just can monitor passing through smoothly of dredging pipe ware to monitor location dredging pipe ware simply, conveniently.

According to some embodiments of the first aspect of the present invention, the signal acquisition module includes a sensor and a signal acquisition circuit, the sensor, the signal acquisition circuit and the control module are sequentially connected, the sensor is configured to acquire the magnetic signal and send the magnetic signal to the signal acquisition circuit, and the signal acquisition circuit outputs the voltage signal to the control module according to the magnetic signal.

According to some embodiments of the first aspect of the present invention, the control module includes a filter circuit and an analog-to-digital conversion circuit, the signal acquisition module, the filter circuit and the analog-to-digital conversion circuit are sequentially connected, the filter circuit is configured to filter the voltage signal and send the voltage signal to the analog-to-digital conversion circuit, and the analog-to-digital conversion circuit is configured to convert the filtered voltage signal into the digital signal.

According to some embodiments of the first aspect of the present invention, the monitoring device is mounted on a test pile or a marker pile of the pipeline.

In a second aspect, an embodiment of the present invention provides a positioning system for a pipe pig, where the positioning system includes a pipe pig, a terminal device and a monitoring apparatus implementing any one of the embodiments of the first aspect, the pipe pig carries a magnetic member, and the terminal device communicates with the communication module.

The positioning system of the pipe pig according to the embodiment of the second aspect of the present invention has at least the following advantages:

when the positioning system is used, when a pipe cleaner carrying a magnetic part passes through the monitoring device arranged on the pipeline in the pipeline, the signal acquisition module of the monitoring device can acquire the magnetic signal from the magnetic part and generate a voltage signal according to the magnetic signal, then the control module converts the voltage signal into a digital signal, and the digital signal is sent to the terminal equipment through the communication module, so that the terminal equipment displays the running condition of the pipe cleaner. Through the positioning system, a user can simply and conveniently monitor and position the pipe cleaner, so that the safety of the pipe cleaning operation of the pipeline is improved.

In a third aspect, an embodiment of the present invention provides a method for positioning a pipe pig, which is applied to a control module in a monitoring device, where the monitoring device is installed on a pipeline and is used for monitoring the pipe pig carrying a magnetic member in the pipeline, and the monitoring device further includes: the signal acquisition module is connected to the control module and is used for acquiring a magnetic signal from the magnetic piece; the communication module is connected to the control module and is used for communicating with terminal equipment;

the positioning method comprises the following steps:

acquiring a voltage signal from the signal acquisition module, wherein the voltage signal is obtained by the signal acquisition module according to the magnetic signal of the magnetic part;

converting the voltage signal into a digital signal;

and sending the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipeline pig.

The positioning method of the pipe pig according to the third aspect of the present invention has at least the following advantages:

when the positioning method of the pipe cleaner is used, the control module controls the signal acquisition module to acquire the magnetic signal of the pipe cleaner carrying the magnetic part in the pipeline and generate a voltage signal according to the magnetic signal, then the control module converts the voltage signal into a digital signal and sends the digital signal to the terminal through the communication module, so that the terminal equipment displays the running condition of the pipe cleaner. By the method, a user can simply and conveniently monitor and position the pipe cleaner, so that the safety of pipeline operation is improved.

According to some embodiments of the third aspect of the present invention, the signal acquisition module includes a sensor and a signal acquisition circuit, the sensor, the signal acquisition circuit and the control module are connected in sequence, and the voltage signal is generated by the signal acquisition circuit after the sensor acquires the magnetic signal from the magnetic member.

According to some embodiments of the third aspect of the invention, the converting the voltage signal to a digital signal comprises:

filtering the voltage signal to obtain the filtered voltage signal;

and converting the voltage signal after filtering into the digital signal.

In a fourth aspect, an embodiment of the present invention provides a control module, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing the method of positioning a pig as described in the third aspect embodiment above.

When the control module is operated, the processor controls the signal acquisition module to acquire the magnetic signal of the pipe cleaner carrying the magnetic part in the pipeline and generate a voltage signal according to the magnetic signal, then the processor converts the voltage signal into a digital signal and sends the digital signal to the terminal through the communication module, so that the terminal equipment displays the operation condition of the pipe cleaner. By operating the control module, a user can simply and conveniently monitor the positioning pipe cleaner.

In a fifth aspect, the present invention further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the positioning method of the pig as described in the third aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a pig of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a monitoring device according to an embodiment of the present invention;

FIG. 3 is a monitoring flow diagram of a monitoring device in accordance with an embodiment of the present invention;

fig. 4 is a flow chart of a method of positioning a pig of an embodiment of the present invention;

fig. 5 is a detailed flowchart of step S200 in fig. 4.

Reference numerals:

a pig 100; a signal acquisition module 200; a communication module 300; a control module 400; a power supply module 500; a conduit 600; a pipe pile 700;

driving the cup 110; the magnetic member 120.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The embodiments of the present invention will be further explained with reference to the drawings.

In a first aspect, an embodiment of the present invention provides a monitoring device.

Referring to fig. 1 and 2, the monitoring device, including but not limited to, the signal acquisition module 200, the communication module 300, and the control module 400, is mounted on a pipeline 600 and is used to monitor the pig 100 carrying the magnetic member 120 within the pipeline 600.

Specifically, the signal acquisition module 200 is configured to acquire a magnetic signal from the magnetic member 120 and generate a voltage signal according to the magnetic signal; the communication module 300 is used for communicating with the terminal equipment; the control module 400 is connected to the signal acquisition module 200 and the communication module 300, respectively, the control module 400 is configured to acquire a voltage signal from the signal acquisition module 200 and convert the voltage signal into a digital signal, and the control module 400 is further configured to transmit the digital signal to a terminal device through the communication module 300, so that the terminal device displays an operation condition of the pig 100.

When the monitoring device is used, when the pig 100 with the magnetic member 120 passes through the corresponding position on the pipeline 600 where the monitoring device is installed, the signal acquisition module 200 acquires the magnetic signal from the magnetic member 120, generates a voltage signal according to the magnetic signal, and then the control module 400 converts the voltage signal into a digital signal and transmits the digital signal to the terminal device through the communication module 300, so that the terminal device displays the operation condition of the pig 100. Through this monitoring device installed on pipeline 600, the user need not to use signal receiving device to wait along pipeline 600, just can monitor passing through smoothly of dredging pipe ware 100 to monitor location dredging pipe ware 100 simply, conveniently.

It should be noted that the monitoring device can be divided into an above ground part and an underground part. In use of the monitoring apparatus, the signal collection module 200 is installed on the pipeline 600, i.e., an underground portion, and the communication module 300 and the control module 400 are disposed on the pipe pile 700, i.e., an above-ground portion. It is understood that the user may fixedly mount the signal collection module 200 on the pipeline 600, or may detachably mount the signal collection module 200 on the pipeline 600, so as to facilitate the replacement of the signal collection module 200. In addition, the power supply module 500 of the monitoring device may employ a power supply device such as a large-capacity battery or a solar cell panel. When the solar cell panel is adopted, the maintenance of a user on the monitoring device can be reduced, and the use convenience is improved.

It is understood that the signal acquisition module 200 includes, but is not limited to, a sensor and a signal acquisition circuit, wherein the sensor, the signal acquisition circuit and the control module 400 are connected in sequence, the sensor can acquire a magnetic signal and transmit the magnetic signal to the signal acquisition circuit, and then the signal acquisition circuit can output a voltage signal to the control module 400 according to the magnetic signal. When the monitoring device is used, when the pig 100 carrying the magnetic member 120 passes through the signal collection module 200, the sensor acquires a magnetic signal, converts the magnetic signal into a voltage signal, and outputs the voltage signal to the control module 400 through the signal collection circuit. The sensor may be a hall sensor or a magnetoelectric sensor.

It can be understood that the control module 400 includes, but is not limited to, a filter circuit and an analog-to-digital conversion circuit, wherein the signal acquisition module 200, the filter circuit and the analog-to-digital conversion circuit are connected in sequence, the filter circuit can filter the voltage signal and send the voltage signal to the analog-to-digital conversion circuit, and then the analog-to-digital conversion circuit can convert the filtered voltage signal into a digital signal. When the monitoring device is used, the signal acquisition module 200 sends a voltage signal to the control module 400, and then a filter circuit in the control module 400 filters the voltage signal and an analog-to-digital conversion circuit converts the filtered voltage signal into a digital signal.

It will be appreciated that the monitoring device is mounted on a test or marker post of the pipeline 600. Because mark stake, the test stake on present pipeline 600 are complete, and mark stake generally along pipeline 600 full line interval 100 meters distribution, test stake interval 1 ~ 2km distributes, consequently, install monitoring devices at these pipeline stake 700, test stake or mark on the stake promptly, can conveniently, install easily, can maintain with other devices on test stake or the mark stake in addition, alleviate work burden, reduce the cost of labor. Also, the spaced apart distribution of the pipe piles 700 enables timely and convenient positioning and monitoring of the moving pig 100 in the pig process.

Based on the monitoring device of the embodiment of the first aspect, the positioning system of the pig of each embodiment of the second aspect of the present invention is proposed.

In a second embodiment of the present invention, there is provided a pig positioning system, including but not limited to a pig 100, a terminal device and the monitoring apparatus of any of the above embodiments of the first aspect, wherein the pig 100 carries a magnetic member 120, and the terminal device is in communication with a communication module 300.

Referring to fig. 3, when the pig 100 carrying the magnetic member 120 passes through the monitoring device installed on the pipeline 600 in the pipeline 600, the signal acquisition module 200 of the monitoring device acquires the magnetic signal from the magnetic member 120 and generates a voltage signal according to the magnetic signal, and then the control module 400 converts the voltage signal into a digital signal and transmits the digital signal to the terminal device through the communication module 300, so that the terminal device displays the operation condition of the pig 100. Through the positioning system, a user can simply and conveniently monitor and position the pipe cleaner 100, thereby improving the safety of the pipe cleaning operation of the pipeline 600.

Since the positioning system for a pig according to the embodiment of the second aspect of the present invention includes the monitoring device according to any one of the embodiments of the first aspect, reference may be made to the specific implementation and technical effects of the positioning system for a pig according to the embodiment of the second aspect of the present invention.

It should be noted that the magnetic member 120 of the pig 100 may be a permanent magnet or an electromagnet, and in addition, the magnetic member 120 may be a natural magnet or an artificial magnet. When the permanent magnet is used as the magnetic member 120, the magnetic performance is kept stable for a long time, thereby reducing the replacement frequency of the magnetic member 120 and reducing the production cost.

It should be noted that the pig 100 may include a drive cup 110, and the magnetic member 120 is disposed on the drive cup 110. The magnetic member 120, which is disposed on the driving cup 110 of the pig 100, can generate a magnetic signal without causing an obstruction to the operation of the pig 100. The permanent magnet is small in size, easy and convenient to install, and the arrangement can simply and conveniently enable the pipe cleaner 100 to generate a magnetic signal.

Based on the monitoring device of the embodiment of the first aspect and the positioning system of the pig of the embodiment of the second aspect, the positioning method of the pig of each embodiment of the third aspect of the present invention is proposed.

Referring to fig. 4, a method for positioning a pig according to a third embodiment of the present invention is applied to a control module in a monitoring device, which is mounted on a pipeline and is used for monitoring a pig carrying a magnetic member in the pipeline, wherein the monitoring device further includes: the signal acquisition module is connected to the control module and is used for acquiring a magnetic signal from the magnetic part; the communication module is connected to the control module and is used for communicating with the terminal equipment; the positioning method includes, but is not limited to, step S100, step S200, and step S300.

Step S100: and acquiring a voltage signal from the signal acquisition module, wherein the voltage signal is obtained by the signal acquisition module according to the magnetic signal of the magnetic part.

Step S200: the voltage signal is converted into a digital signal.

Step S300: and sending the digital signal to the terminal equipment through the communication module so that the terminal equipment displays the running condition of the pipe cleaner.

Through the steps of S100, S200 and S300, the control module controls the signal acquisition module to acquire a magnetic signal of a pipe cleaner carrying a magnetic part in a pipeline and generate a voltage signal according to the magnetic signal, then the control module converts the voltage signal into a digital signal, and sends the digital signal to the terminal through the communication module, so that the terminal equipment displays the running condition of the pipe cleaner, and a user is helped to execute corresponding operations of pipe cleaning operation. By the method, a user can simply and conveniently monitor and position the pipe cleaner, so that the safety of pipeline operation is improved.

Since the positioning method for a pig according to the embodiment of the third aspect of the present invention is applied to the positioning system for a pig according to any embodiment of the second aspect, specific implementation manners and technical effects of the positioning method for a pig according to the embodiment of the third aspect of the present invention can be referred to the specific implementation manners and technical effects of the positioning system for a pig according to any embodiment of the second aspect.

It should be noted that the signal acquisition module includes a sensor and a signal acquisition circuit, the sensor, the signal acquisition circuit and the control module are connected in sequence, and the voltage signal is obtained after the sensor acquires the magnetic signal from the magnetic part and is generated by the signal acquisition circuit.

Referring to fig. 5, fig. 5 is a detailed flowchart of step S200 in fig. 4, and regarding step S200, the following steps S210 and S220 may be specifically included, but not limited to.

Step S210: and carrying out filtering processing on the voltage signal to obtain a voltage signal after filtering processing.

Step S220: and converting the voltage signal after the filtering processing into a digital signal.

Through step S210 and step S220, the control module performs filtering processing on the voltage signal from the signal acquisition module, then converts the filtered voltage signal into a digital signal, and sends the digital signal to the communication module, and then the communication module sends the digital signal to the terminal device, so that the terminal device displays the running condition of the pipe cleaner.

Based on the positioning method of the pig of the embodiment of the third aspect, the control module of the embodiments of the fourth aspect and the computer-readable storage medium of the embodiments of the fifth aspect of the present invention are provided.

A fourth aspect of the present invention provides a control module 400, comprising at least one processor and a memory for communicative connection with the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of positioning a pig according to an embodiment of the third aspect of the invention, for example to perform method steps S100 to S300 in fig. 4, and method steps S210 to S220 in fig. 5, as described above.

When the control module 400 is operated, the processor controls the signal acquisition module 200 to acquire the magnetic signal of the pig 100 carrying the magnetic member 120 in the pipeline 600 and generate a voltage signal according to the magnetic signal, and then the processor converts the voltage signal into a digital signal and transmits the digital signal to the terminal through the communication module 300, so that the terminal device displays the operation condition of the pig 100. By operating the control module 400, a user may simply and conveniently monitor the positioning pig 100.

In a fifth aspect, embodiments of the present invention further provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method for positioning a pig as in any one of the embodiments of the third aspect. The controller or processor of the monitoring device performs the above described method steps S100 to S300 and method steps S210 to S220.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.