KR20100093374A - System for insecting a wrong connecting of a drain pipe utilizing a sound wave and positioning information and method using the same - Google Patents

Abstract

PURPOSE: A drain pipe error contact inspecting system using location information and sound wave and an inspecting method using the same are provided to reduce costs and times, since error contact inspection is enabled by repeatedly using the inspecting system. CONSTITUTION: A drain pipe error contact inspecting method using location information and sound wave comprises following steps. A test condition for inspecting the error contact of a drain pipe is inputted. The synchronization information of the location information by GPS is extracted using a DGPS unit. The synchronization information is transmitted to a sound measuring terminal so that the corrected location information of the sound measuring terminal may be measured. The quantity of sound wave is measured by receiving and transmitting sound wave using the sound measuring terminal.

Description

SYSTEM FOR INSECTING A WRONG CONNECTING OF A DRAIN PIPE UTILIZING A SOUND WAVE AND POSITIONING INFORMATION AND METHOD USING THE SAME}

The present invention relates to a sewer pipe fault inspection system and inspection method using position information and sound waves, and more particularly, to a sewage pipe fault inspection system and inspection method for inspecting sewage pipes that are erroneously contacted using position information and sound waves.

Sewage pipes for treating domestic wastewater and rainwater are mainly composed of sewage pipes, and the sewer pipes are composed of sewage pipes for treating domestic wastewater and rainwater pipes.

The sewage pipe and rainwater pipe constituting the sewer type sewer pipe are installed to be separated from each other. The sewage pipe and rainwater pipe are connected to each other in a specific part.

If the sewage pipe is in contact with the sewage pipe, the sewage flows into the rainwater pipe in Cheongcheon-si to generate rivers and water pollution. In rainy weather, rainwater flows into the sewage pipe, exceeding the capacity of the sewage treatment plant or overflowing through sewage manholes. This sewage failure has a high rate of occurrence, which corresponds to 30% of all sewer pipes.

In order to prevent the sewage contaminant phenomenon, the importance of the sewage contaminant is being selected as the first step to implement the sewage pipe maintenance project, which is a national project to invest 36 trillion won for 20 years.

1A and 1B show a sewage pipe fault inspection method according to the prior art. FIG. 1A shows Smoke Testing. The smoke test is a method of selecting a section of sewage pipes to be investigated and taking measures to prevent smoke from leaking outside of that section, and then generating smoke in the manhole to investigate the area where the false contact occurred.

If smoke is generated in the manhole to be investigated, the smoke is spread through all the connecting pipes connected to the sewer pipe, so that smoke is generated in the sewage pipe which is erroneous, so it is possible to know whether or not the sewage pipe has occurred.

1B shows dye water testing. Dye test is a method to check the contact status of sewage pipes by analyzing tracer's path and concentration by flowing tracer.

In the dye test, tracers such as dyes are allowed to flow down the sewers connected to the sewer pipes, and the contact status of the sewer pipes can be checked by observing whether tracers are detected in each sewer manhole.

However, the sewage pipe miscontact inspection method according to the prior art as described above has the following problems.

In the case of the smoke test, because the leaking state of the sewer pipe through the smoke leaking to the outside there is a problem that you do not know exactly where the smoke is leaking on a windy day.

In the case of the dye test, a large amount of water must be flowed to send the tracer to the sewer pipe, and the tracer is easy to handle and has a property of biodegradability and chemical reaction with sediment in the sewer pipe.

In addition, smoke test and dye test have a problem that the measurement is not accurate because the smoke does not diffuse and the tracer does not move when water is filled in the sewage pipe or when there are a lot of other suspended matters.

The present invention is to solve such a conventional problem, an object of the present invention is to be able to inspect a variety of incorrect contact form without being influenced by the external environment during the contact inspection.

Another object of the present invention is to minimize the cost and time required for misinspection.

It is another object of the present invention to accurately perform a false test.

According to a feature of the present invention for achieving the above object, sewage pipe contact inspection method using the position information and sound waves of the present invention is installed on both ends of the sewer pipe and the sound wave measuring terminal for transmitting and receiving sound or measuring the position information, the sound wave Using a DGPS unit for transmitting a synchronization signal for position information to a measuring terminal, and a control terminal for determining whether or not the sewage pipe is erroneous with the information measured by the sound wave measuring terminal using a sewer pipe contact inspection system using the location information and sound waves In the method for determining whether or not the sewage pipe is wrong, A method for inputting a test condition for checking whether the sewage pipe is wrong; Position information measuring step of measuring the corrected position information of the sound wave measurement terminal by extracting the synchronization information of the position information by GPS using the DGPS unit and transmitting it to the sound wave measurement terminal: Sound wave using the sound wave measurement terminal Sound wave amount measuring step of measuring the sound wave amount by transmitting and receiving; It is preferable to include a mis-contact determination step of determining whether or not the sewage pipe erroneous using the position information measured by the position information measuring step and the sound wave amount information measured by the sound wave amount measuring step.

It is preferable to include the step of creating a sewage pipe map based on the sewage pipe miscontact result determined by the step of determining whether or not erroneous contact of the present invention.

The position information measuring step of the present invention includes the steps of receiving position information by the DGPS unit; Extracting synchronization information from the location information received by the DGPS unit; Transmitting the synchronization information extracted by the DGPS unit to the sound wave measurement terminal; and measuring the corrected position information of the sound wave measurement terminal based on the synchronization information transmitted to the sound wave measurement terminal. Do.

The sound wave measurement step of the present invention comprises the steps of installing the sound wave measurement terminals on both ends of the sewage pipe; Transmitting sound waves through the sound wave measuring terminal installed in the sewage pipe; and Receiving sound waves through the sound wave measuring terminal installed in the sewer pipe.

The sound wave amount measuring step of the present invention preferably includes transmitting the position information measured by the position information measuring step and the sound wave amount information measured by the sound wave amount measuring step to the DGPS unit.

Preferably, the step of determining whether or not the miscontact of the present invention includes the step of setting the sewer pipe inspection interval by substituting the position information measured by the position information measuring step into a geographic information system (GIS).

Preferably, the step of determining whether or not the erroneous contact of the present invention includes the step of determining whether or not the sewage pipe erroneous by measuring the transmission loss amount of the sound wave amount and the delay time of the sound wave.

It is preferable to repeat the sound wave amount measurement step and the false contact determination step by changing the conditions for the false contact result determined by the false contact determination step of the present invention.

Sewer pipe fault inspection system using the location information and sound waves of the present invention is installed on both ends of the sewer pipe, the sound wave measuring terminal for measuring the sound wave amount by transmitting and receiving sound waves to the sewer pipe, and measuring the location information of the measurement area through GPS; A DGPS unit for processing the location information received through GPS and transmitting the extracted synchronization information to the sound wave measurement terminal; and a sewer pipe connected to the DGPS unit, through the position information and sound wave amount information measured by the sound wave measurement terminal. It is preferable to include a management terminal to determine whether or not the contact.

It is preferable that the management terminal of the present invention determines whether the sewage pipe is in error by measuring the transmission loss amount of the sound wave amount and the delay time of the sound wave.

It is preferable that the management terminal of the present invention sets the inspection section of the sewer pipe by substituting the position information measured by the sound wave measurement terminal into the geographic information system (GIS).

It is preferable that the management terminal of the present invention is controlled so as to repeat the sound wave measurement of the sound wave measurement terminal by changing the condition on the result of the determination of the false contact of the sewage pipe.

It is preferable that the management terminal of this invention prepares a sewage pipe map based on the determination result of the sewage pipe misconnection.

The sound wave measurement terminal of the present invention includes a position information receiver for measuring geographic information by GPS; A sound wave generator for generating sound waves in the sewer pipe; A sound wave measuring unit for measuring the sound wave transmitted through the sewer pipe; and preferably comprises a central control unit for controlling the components including the position information receiver, the sound wave generator and the sound wave measurement.

The sound wave measurement terminal of the present invention includes a memory unit for storing information by the position information receiver, the sound wave generator and the sound wave measurement unit; Transmitting and receiving unit for transmitting the information by the position information receiving unit, the sound wave generation unit and the sound wave measuring unit to the DGPS unit or receives information transmitted from the DGPS unit; And the user confirms the measured information or input the input signal It is preferable to include a user interface.

The sound wave generator of the present invention preferably includes a sound wave control unit for controlling the operation of the sound wave generator.

The sound wave measuring unit of the present invention preferably includes a sound wave measuring unit for converting the voice signal measured by the sound wave measuring unit into a digital signal.

The DGPS unit of the present invention includes a location information receiver for receiving GPS location information; A DGPS processing unit for extracting synchronization information through GPS location information received by the location information receiving unit; A central processing unit configured to provide the location information extracted by the DGPS processing unit to the sound wave measuring terminal or to provide information transmitted from the sound wave measuring terminal to the management terminal; and the location information extracted by the DGPS processing unit. It is preferable to include a transceiver for transmitting to the measurement terminal or receiving information transmitted from the sound wave measurement terminal.

The sound wave measurement terminal of the present invention is preferably installed in the manhole of the sewage pipe, and includes a support device for supporting the sound wave measurement terminal.

The support apparatus of the present invention preferably includes a base frame installed in the manhole, and a terminal mounting portion fixed to adjust the installation position on the base frame, and fixing the sound wave measurement terminal to the base frame.

The base frame of the present invention is supported on the inner surface of the manhole, the horizontal length adjusting portion configured to be adjustable in the horizontal direction in the base frame, and supported on the bottom surface of the manhole, the length in the vertical direction in the base frame It is preferable to include a vertical length adjusting portion configured to be adjustable.

Terminal mounting portion of the present invention is formed of a container having an upper surface is opened and the holding portion is seated on the sound wave measurement terminal, and fasteners are configured to fix the holding portion to the base frame to adjust the installation position of the sound wave measurement terminal It is preferable to include a part.

The DGPS unit and the sound wave measurement terminal of the present invention is preferably connected by wire or wirelessly.

According to the sewage pipe fault inspection system and inspection method using the location information and sound waves according to the present invention, since the sound wave is not affected by the external environment, it is possible to inspect various miscontact patterns, and by repeatedly using the inspection system, It is possible to save cost and time, and because the sound wave passes regardless of the type of the medium, there is an advantage that accurate false contact inspection is possible.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the sewage pipe fault inspection system and inspection method using the position information and sound waves according to the present invention will be described in detail.

2 to 10 show a preferred embodiment of the false contact inspection system and inspection method according to the present invention.

False contact inspection system of the present invention is installed on both ends of the sewer pipe, the sound wave measurement terminal for measuring the sound wave amount by transmitting and receiving sound waves to the sewer pipe, and measuring the location information of the measurement area through GPS; A DGPS unit for processing the location information received through GPS and transmitting the extracted synchronization information to the sound wave measurement terminal; and a sewer pipe connected to the DGPS unit, through the position information and sound wave amount information measured by the sound wave measurement terminal. It includes a management terminal to determine whether or not the contact.

As shown in FIG. 2, the support apparatus 20 is installed in the manhole 13 provided at both ends of the sewage pipe 10 to check whether the sewage pipe is erroneously contacted. The support device 20 is a device for assisting the installation of the sound wave measurement terminal 40 to be described below. The support device 20 may be provided in each of the manholes 13 provided at both ends of the sewage pipe to be inspected for incorrect contact.

The support device 20 is provided with a base frame 25 which serves as a base support for the support device 20 to be installed in the manhole 13. The base frame 25 is formed in a rod shape so that it can be installed in the vertical direction in the manhole.

A horizontal support 27 is provided at the top of the base frame 25. The horizontal support 27 is formed in the vertical direction of the longitudinal direction of the base frame 25. Both ends of the horizontal support 27 is provided with a horizontal length adjusting unit 29.

The horizontal length control unit 29 is a member that can be supported in close contact with the side of the manhole (13). The horizontal length control unit 29 is configured to be protruded or inserted at both ends of the horizontal support (27).

The horizontal length adjusting unit 29 may be configured to have a threaded portion formed on the horizontal support 27 and a threaded portion formed on the horizontal length adjusting portion 29 to adjust the length. In addition, the horizontal length control unit 29 may be configured to elastically protrude with an elastic member therein.

Since the length is adjusted to be in close contact with the inner surface of the manhole 13, the horizontal length adjustment unit 29 serves to fix the support device 20 in the horizontal direction.

The lower end of the basic frame 25 is provided with a vertical length adjusting unit 31. The vertical length adjusting unit 31 is also configured such that the vertical length is adjusted like the horizontal length adjusting unit 29. At the lower end of the vertical length adjusting part 31 is provided with a pedestal 33 which can be supported on the bottom of the manhole 13. Accordingly, the vertical length adjusting unit 31 also supports the pedestal 33 to the bottom surface of the manhole 13 to fix the support device 20 to the manhole 13.

The basic frame 25 is provided with a terminal mounting portion 35 for mounting the sound wave measurement terminal 40. The terminal mounting part 35 is formed in a shape such as a container with an upper surface opened, and is formed of a holding part 37 on which the acoustic wave measuring terminal 40 is seated, and a member such as a fastener, thereby holding the holding part 37. It can be composed of a position adjusting unit 39 that can be fixed to the base frame 25 to adjust the installation position of the sound wave measurement terminal 40.

The support unit 20 is provided with a sound wave measurement terminal 40 for measuring sound wave data by transmitting or receiving sound waves through the sewer pipe, and receiving GPS to search for location information. The sound wave measuring terminal 40 may be provided at both ends of the sewer pipe 10, respectively.

As shown in FIG. 4, the sound wave measurement terminal 40 is provided with a location information receiver 41. The location information receiver receives navigation information from a positioning satellite using GPS, which is one of location-based services, and generates its own location number using the received navigation information and its own algorithm.

Specifically, the GPS antenna connected to the location information receiver 41 tracks the satellite signal transmitted from the positioning satellite, and grasps the position of the satellite, its position, and the relative position of other satellites according to the transmitted satellite signal. More specifically, GPS will be described as follows.

GPS is a system that can be located by receiving navigation information from a number of satellites orbiting the earth at an altitude of about 20,000 kilometers. GPS uses radio waves in the 1.5 GHz band, and on the ground there is a coordination center called ControlStation, which collects and synchronizes information from GPS satellites. At this time, the position information receiver 41 detects the position through a method such as triangulation. Here, since the triangulation method knows three satellite positions by navigation information supplied from three satellites, the position is determined by measuring the distance between each satellite and the position information receiver 41. The distance from the satellite to the position information receiver 41 can know the propagation propagation time by the time difference transmitted from each satellite and the time information received by the position information receiver 41, and calculate the distance by multiplying the propagation propagation time by the luminous flux. . Anyone can use this GPS freely, there is no limit on the number of users, positioning is possible in real time, and there is an advantage of relatively accurate position measurement.

The position information received by the position information receiver 41 is transmitted to the DGPS unit 60 by the central controller 51 and the transceiver 55 to be described below.

The sound wave measurement terminal 40 is provided with a sound wave generator 43 for generating sound waves in the sewer pipe (10). The sound wave generator 43 may be configured as a speaker, or a separate amplifier may be further added.

A sound wave control unit 45 is connected to the sound wave generator 43. The sound wave controller 45 controls the operation of the sound wave generator 43 according to a user's input signal. The sound wave control unit 45 serves to output a low frequency or a high frequency through the sound wave generator 43.

In addition, the sound wave measuring terminal 40 is provided with a sound wave measuring unit 47 for measuring the sound waves generated by the sound wave generator 43. The sound wave measuring unit 47 is configured as a microphone and serves to measure the sound wave generated by the sound wave generating unit 43.

The sound wave measuring unit 47 is connected to the sound wave measuring unit 49. The sound wave measuring unit 49 measures a sound wave measured by the sound wave measuring unit 47 and converts an analog signal such as sound wave into a digital signal.

The sound wave measurement terminal 40 is provided with a central control unit 51. The central control unit 51 receives position information through synchronization according to the synchronization information received from the DGPS unit 60, or the transmission and reception unit (described below) to describe the sound wave information measured by the sound wave measurement unit 47 ( 55 to transmit to the DGPS unit 60, or to control the sound wave generation unit 43 to generate sound waves.

5A and 5B, the sound wave measuring terminal 40 shows a principle of determining whether the sewage pipe 10 is in error. As shown, sound waves have a characteristic of being attenuated at a predetermined rate while passing through a medium such as air or water. Therefore, as shown in FIG. 5A, when the sound wave measuring terminal 40 installed at one end of the sewage pipe 10 transmits sound waves, the sound wave measuring terminal 40 installed at the other end of the sewage pipe is attenuated at a predetermined rate while passing through the sewer pipe 10. Is received).

However, if there is a miscontact pipe 11 inside the sewer pipe 10 as shown in FIG. 5B, a part of sound waves moving through the sewer pipe 10 leaks through the miscontact pipe 11. Therefore, the sound wave measurement terminal 40 receives a sound wave amount Pa less than the sound wave amount Pa to be attenuated at the original attenuation ratio.

Accordingly, the management terminal 70 calculates the transmission loss (dB) of the sound wave corresponding to the section length of the sewer pipe 10 and attenuates the sound wave measured by the sound wave measurement terminal 40 according to the calculated transmission loss (dB). To determine whether it has been received.

And, the position information measured by the position information receiver 41, the time information of the sound wave generator 43 and the sound wave measurement unit 47, the sound wave amount measured by the sound wave measurement unit 47 Information and the like are stored in the memory unit 53. In addition, the sound wave measurement terminal 40 is provided with a transceiver 55 for transmitting information to the DGPS unit 60 or receiving information transmitted from the DGPS unit 60.

The sound wave measurement terminal 40 is provided with a user interface 57 that allows a user to input an input signal and monitor the measured result.

The sound wave measurement terminal 40 receives synchronization information regarding location information from the DGPS unit 60. The DGPS unit 60 measures positional information using DGPS (Differential GPS). DGPS is a relative positioning method of GPS surveying. The DGPS unit 60 corrects an error-producing element by using a known reference point coordinate. Means to get a more accurate location by reducing

The errors caused by GPS survey techniques are mainly due to structural factors such as satellite orbit errors, satellite clock errors, ionospheric errors, tropospheric errors, multipath errors, and receiver errors, and geometrical correction errors due to satellite positioning. In order to correct the GPS error, an error with the GPS position information is calculated using a geostationary satellite or a ground correction station.

The DGPS unit 60 is provided with a location receiver 41 for receiving location information of the DGPS unit 60. The DGPS processing unit 63 extracts synchronization information about the location information through the location information received by the location information receiving unit 41.

That is, in order to accurately measure the position of the sewer pipe 10, the synchronization information for the position information received by the sound wave measurement terminal 40 installed on both ends of the sewer pipe 10 is required. Since location information using GPS generates errors due to satellite orbits, satellite time, etc., the information on this information must be synchronized to obtain the result under the same conditions so that the accurate sewer length can be measured. Therefore, the DGPS processing unit 63 calculates the synchronization information on the position signal and transmits the same to the respective sound wave measurement terminals 40 so that accurate position information of the sound wave measurement terminal 40 can be determined.

The synchronization information calculated by the DGPS processing unit 63 is transmitted to the central control unit 51 in the sound wave measurement terminal 40 through the transceiver 55 provided in the DGPS unit 60. The central controller 51 in the sound wave measurement terminal 40 obtains the corrected position information by controlling the position information receiver 41 in the sound wave measurement terminal 40 through the synchronization information transmitted from the DGPS unit 60. Can be.

The DGPS unit 60 transmits the synchronization information calculated by the DGPS processing unit 63 to the sound wave measurement terminal 40 or the location information or sound information transmitted from the sound wave measurement terminal 40 will be described below. A central processing unit 65 for transmitting to the management terminal 70 is provided.

The DGPS unit 60 may be connected to the management terminal 70 by wire or wireless. The management terminal 70 prepares a sewage pipe map using the position information measured by the sound wave measurement terminal 40, or determines whether the sewage pipe is in error by using the acoustic information measured by the sound wave measurement terminal 40. .

In order for the management terminal 70 to create a sewer pipe map, the geographical position of both ends of the sewer pipe 10 must be determined through the position information measured by each sound wave measurement terminal 40. That is, the geographical position of both ends of the sewer pipe is designated to a geographic information system (GIS) previously stored in the management terminal 70 through the position information measured by the sound wave measurement terminal 40.

Since the management terminal 70 includes not only general geographic information but also design information for sewer pipes, the management terminal 70 uses sewage pipe maps through geographic information and design information of sewer pipes designated by the geographic information system. I can write it.

The management terminal 70 is the sound wave measurement unit 47 of the sound wave information terminal 40 provided at the other end of the sewer pipe and sound wave information measured by the sound wave measurement unit 47 of the sound wave measurement terminal 40 installed at one end of the sewage pipe. Compare the sound wave information measured by the test to check for incorrect contact. That is, the management terminal 70 may determine whether the sewage pipe is in error by calculating the sound wave amount Pa measured at both ends of the sewer pipe.

The management terminal 70 is provided with a separate user interface for displaying the processing results. The management terminal 70 may display processing results of the sound wave amount Pa and the analyzed sound wave information measured by the sound wave measurement terminal 40 through a user interface, and determined through the analyzed sound wave information. The contact status of sewer pipes can be provided with geographic information.

In addition, the management terminal 70 may provide the user with sound wave measurement contents such as operation screens and frequency control for high or low frequencies generated by the sound wave measurement terminal 40 through a user interface. In addition, the operation of the sound wave measurement terminal 40 may be controlled through the management terminal 70.

Hereinafter will be described in detail the operation of the sewage pipe fault inspection system and inspection method using GPS and sound waves according to the present invention having the configuration as described above.

First, the step of installing the support device 20 and the sound wave measurement terminal 40 to perform a false contact inspection of the sewage pipe.

The support device 20 is installed in the manhole 13 located at both ends of the section by setting a section of the sewage pipe 10 to be inspected for misalignment. Then, the sound wave measurement terminal 40 is mounted on the terminal mounting portion 35 provided in the basic frame 25 of the support device 20.

When the sound wave measuring terminal 40 is mounted on the support device 20, the pedestal 33 of the vertical length adjusting part 31 provided on the basic frame 25 of the support device 20 is disposed in the manhole 13. Support on the floor. When the vertical length adjusting unit 31 is fixed, the length of the horizontal length adjusting unit 29 is adjusted to be supported on the inner surface of the manhole 13. In this way, the support device 20 is fixed to the manhole 13.

When the support device 20 is installed in the manhole 13, the sound wave measuring terminal 40 is set. Through the management terminal 70 performs a test condition setting step such as the conditions for synchronizing the position information of the GPS, the type of sound waves, the number of sound wave inspection and the detailed conditions required for the inspection.

In setting the inspection conditions, the sound wave used in the sound wave measurement terminal 40 may be set to a high frequency or a low frequency. Since high frequency has a strong straightness, it is easy to determine whether or not misalignment is high because the amount of sound waves Pa is high, but it is not suitable for the sewer pipe 10 having a large number of curved sections due to its weak diffraction. On the contrary, since the low frequency has a property opposite to that of the high frequency, it is preferable that the inspector sets and inputs sound waves according to the characteristics of the sewer pipe 10.

When the test condition is set, the position information is received through GPS, and the synchronization information on the position information is extracted and transmitted to each sound wave measurement terminal 40 to perform the position information measurement step of measuring the corrected position information.

First, after receiving location information through the location information receiver 41 provided in the DGPS unit 60, the synchronization information is extracted by the DGPS processing unit 63. The central processing unit 65 and the transmitting / receiving unit 55 of the DGPS unit 60 transmit the synchronization information to the sound wave measurement terminal 40. The sound wave measurement terminal 40 receives the corrected position information through the received synchronization information.

When the sound wave measurement terminal 40 receives the position information, the sound wave measurement terminal 40 measures the sound wave amount for the sewer pipe to be inspected. First, the sound wave is transmitted into the sewage pipe through the sound wave generator 43 provided in the sound wave measuring terminal 40 installed at one end of the sewage pipe.

The sound wave generation unit 43 transmits sound waves by the sound wave control unit 45, and the sound wave transmitted by the sound wave generation unit 43 is installed at the other end of the sound wave measuring unit 47 and the sewage pipe installed at one end of the sewer pipe. Each is measured by the sound wave measuring unit 47. The sound wave transmitted by the sound wave generator 43 is measured by the sound wave measurement unit 47 provided at the other end of the sewer pipe after a predetermined time elapses.

The sound waves measured by the sound wave measuring unit 47 provided at one end and the other end of the sewer pipe are converted into digital signals by the sound wave measuring unit 49 and stored in the memory unit 53. Sound wave amount, sound wave generation time and location information stored in the memory unit 53 is transmitted to the management terminal 70 through the DGPS unit 60.

When the information measured by the sound wave measurement terminal 40 is input to the management terminal 70, the management terminal 70 determines whether the sewage pipe is in error by using the location information and sound wave information to create a sewer pipe map.

First, the management terminal 70 performs a location information processing step of specifying the section of the sewer pipe to be checked for false contact by processing the location information measured by the sound wave measurement terminal 40. Check the sewer pipe section to be measured by substituting the position information measured by the sound wave measurement terminal 40 to the geographic information system stored in the management terminal 70.

That is, the geographic information system stored inside the management terminal 70 includes not only general geographic information but also design information for sewer pipes buried underground, so that the position information measured by the sound wave measurement terminal 40 is substituted into the geographic information. It is possible to set the sewage pipe section to check whether there is a mistake.

When the section of the sewage pipe is set, it is determined whether the sewage pipe is in error by using the sound wave amount measured by the sound wave measuring terminal 40. As described above, the management terminal 70 may determine whether some of the sound waves leak through the miscontact pipe 11 based on the amount of sound waves attenuated while passing through the sewer pipe.

Even after the management terminal 70 determines whether or not the sewage pipe is erroneous, if the result is ambiguous to determine whether or not to erroneous or if you want to re-examine under different sonic conditions, the above-mentioned sound wave volume measurement step and the erroneous determination step are repeated. Can be carried out.

When the mismanagement of the inspection section of the sewer pipe is inspected by the management terminal 70, a sewage pipe map can be created based on the result. That is, the user can monitor the inspection result by creating a map by substituting the sewage pipe miscontact result in the geographic information system and the sewer pipe piping diagram stored in the management terminal 70.

6A to 7B show a measurement result of the sound wave amount measured by the sound wave measurement terminal 40. 6A and 7A show sound waves recorded in the sound wave measuring unit 47 provided at one end of the sewer pipe (sound wave measuring terminal generated by the sound wave generating unit), and FIGS. 6B and 7B show the other end of the sewer pipe (sound wave). The sound wave recorded in the sound wave measuring unit 47 provided in the sound wave measuring terminal) in which no sound wave is generated by the generator is shown. 6B is an experimental result for a case where a false contact did not occur, and FIG. 7B is a test result for a case where a false contact occurred.

As shown in FIG. 6B, since no contact occurs in the sewer pipe 10, the sound wave transmitted by the sound wave generator 43 is attenuated at a predetermined rate and received by the sound wave measurement unit 47. However, in the case of FIG. 7B, a false contact occurs in the sewage pipe 10, so that sound waves leak into the false contact pipe 11, and thus, a significantly smaller sound wave has been reached than FIG. 6B.

In addition, the management terminal 70 is a sound wave measurement unit 47 provided in the sound wave measurement terminal 40 for generating a sound wave and the sound wave provided in the sound wave measurement terminal 40 (sound wave is generated) that does not generate sound waves The distance between one end of the sewer pipe and the other end is calculated through the delay time t _d of the sound wave measured by the measuring unit 47.

As illustrated in FIG. 8, the sound wave transmitted from the sound wave generator 43 arrives at the sound wave measurement unit 47 after a predetermined delay time t _d elapses. Accordingly, the management terminal 70 calculates the distance traveled by the sound wave by the delay time t _d and the sound wave moving speed to calculate the transmission loss (dB) of the sound wave.

As shown in FIG. 9, the transmission loss (dB) corresponds to about 13 to 48% of the normal sewage pipe 10, and corresponds to 52 to 80% of the sewage pipe 10 that is misdirected. Therefore, the management terminal 70 compares the sound wave amount Pa calculated by the transmission loss (dB) of the sound wave with the sound wave amount Pa received from the sound wave measurement terminal 40 in which no sound wave is generated. 10) it is possible to determine whether or not.

In the scope of the basic technical spirit of the present invention, many modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. .

According to the sewage pipe fault inspection system and inspection method using the location information and sound waves according to the present invention as described above in detail has the following advantages.

Since sound waves are not affected by the weather environment or other surrounding conditions and have diffraction and straightness, various types of miscontacts can be inspected, thereby improving the variety of inspection types.

In addition, if the initial inspection system is provided, it is possible to repeatedly use the wrong contact inspection, and the maintenance cost is almost insignificant, and the sound wave inspection does not take much time, thereby saving the cost and time.

In addition, since sound waves have a property of passing through a medium such as air and water, even if water is accumulated inside the sewer pipe, the false contact can be investigated, so the accuracy of the false survey is improved.

Figure 1a is a schematic configuration diagram showing a sewage pipe malfunction inspection method according to the prior art.

Figure 1b is a schematic configuration diagram showing another embodiment of the sewage pipe inspection method according to the prior art.

Figure 2 is a schematic diagram showing a preferred embodiment of the sewage pipe fault inspection system using the position information and sound waves according to the present invention.

Figure 3 is a side view showing a support device of the sewage pipe fault inspection system using the position information and sound waves according to the present invention.

Figure 4 is a schematic diagram showing the configuration of the sewage pipe fault inspection system using the position information and sound waves according to the present invention.

5a and 5b is a state diagram showing the principle of the sewage pipe contact inspection system using the location information and sound waves according to the present invention.

6A and 6B are graphs showing sound wave amounts when no contact is generated in the sewer pipe;

7A and 7B are graphs showing sound wave amounts when a malfunction occurs in a sewer pipe;

8 is a graph showing a result of measuring the delay time by the sewage pipe fault inspection system using the position information and sound waves according to the present invention.

9 is a graph showing the transmission loss of sound waves passing through the sewer pipe.

Figure 10 is a flow chart showing the sequence of sewage pipe contact inspection method using the location information and sound waves according to the present invention.

Description of the main parts of the drawing

20: support device 25: basic frame

27: horizontal support 29: horizontal length adjustment unit

31: vertical length adjustment unit 33: pedestal

35: terminal mounting portion 40: sound wave measurement terminal

41: location information receiver 43: sound wave generator

45: sound wave control unit 47: sound wave measurement unit

49: sound wave measurement unit 51: central control unit

53: memory 55: transceiver

57: user interface 60: DGPS unit

63: DGPS processing unit 65: central processing unit

70: management terminal

Claims (23)

A sound wave measuring terminal installed at both ends of the sewage pipe for transmitting and receiving sound waves or measuring position information, a DGPS unit for transmitting a synchronization signal for position information to the sound wave measuring terminal, and information measured by the sound wave measuring terminal. In the method of determining whether the sewage pipe is wrong by using the sewage pipe contaminant inspection system using the location information and sound waves, including a management terminal to determine whether or not the contact error, An inspection condition input step of inputting an inspection condition for inspecting whether a sewage pipe is in error; Position information measuring step of measuring the corrected position information of the sound wave measurement terminal by extracting the synchronization information of the position information by GPS using the DGPS unit and transmitting to the sound wave measurement terminal: A sound wave amount measuring step of measuring sound wave amount by transmitting and receiving sound waves using the sound wave measuring terminal; And a misjudging determination step of determining whether or not the sewage pipe is erroneous using the positional information measured by the positional information measuring step and the sound wave volume information measured by the sound wave volume measuring step. Sewage pipe misjunction method using location information and sound waves. The method of claim 1, Comprising a step of creating a sewage pipe map based on the sewage pipe mis-contact result determined by the mis-contact determination step Sewage pipe misjunction method using location information and sound waves. The method of claim 1, The location information measuring step Receiving location information by the DGPS unit; Extracting synchronization information from the location information received by the DGPS unit; Transmitting the synchronization information extracted by the DGPS unit to the sound wave measurement terminal; And Measuring the corrected position information of the sound wave measurement terminal based on the synchronization information transmitted to the sound wave measurement terminal; Sewage pipe misjunction method using location information and sound waves. The method of claim 1, The sound wave measurement step Installing the sound wave measuring terminals at both ends of the sewer pipe; Transmitting sound waves through the sound wave measurement terminal installed in the sewer pipe; and Receiving sound waves through the sound wave measuring terminal installed in the sewer pipe; Sewage pipe misjunction method using location information and sound waves. The method of claim 4, wherein The sound wave measurement step And transmitting the position information measured by the position information measuring step and the sound wave amount information measured by the sound wave amount measuring step to the DGPS unit. Sewage pipe misjunction method using location information and sound waves. The method of claim 1, The step of determining whether or not And setting the sewer pipe inspection section by substituting the location information measured by the location information measurement step into a geographic information system (GIS). Sewage pipe misjunction method using location information and sound waves. The method of claim 1, The step of determining whether or not Determining whether the sewage pipe is in error by measuring the transmission loss amount of the sound wave amount and the delay time of the sound wave Sewage pipe misjunction method using location information and sound waves. The method of claim 1, By repeating the sound wave amount measurement step and the false contact determination step by changing the condition for the false contact result determined by the false contact determination step Sewage pipe misjunction method using location information and sound waves. A sound wave measurement terminal installed at both ends of the sewer pipe, measuring sound wave amount by transmitting and receiving sound waves to the sewer pipe, and measuring position information of a measurement area through GPS; A DGPS unit for processing the location information received through GPS and transmitting the extracted synchronization information to the sound wave measurement terminal; And A management terminal connected to the DGPS unit and determining whether the sewage pipe is in error by using the location information and the sound wave information measured by the sound wave measurement terminal; Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The management terminal is Determining whether the sewage pipe is in error by measuring the transmission loss of sound wave volume and delay time of sound wave Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The management terminal is Setting the inspection section of the sewer pipe by substituting the location information measured by the sound wave measurement terminal into the geographic information system (GIS) Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The management terminal is By changing the condition on the result of the determination of the false contact of the sewer pipe to control to repeat the sound wave measurement of the sound wave measurement terminal Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The management terminal is The sewage pipe map is created based on the result of judgment Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The sound wave measurement terminal A location information receiver for measuring geographic information by GPS; A sound wave generator for generating sound waves in the sewer pipe; A sound wave measuring unit for measuring the sound wave transmitted through the sewer pipe; And It includes a central control unit for controlling the components including the position information receiving unit, the sound wave generator and the sound wave measurement unit Sewage pipe inspection system using location information and sound waves. The method of claim 14, The sound wave measurement terminal A memory unit for storing information by the location information receiver, the sound wave generator, and the sound wave measurement unit; Transmitting and receiving unit for transmitting the information by the position information receiving unit, the sound wave generation unit and the sound wave measurement unit to the DGPS unit or receives information transmitted from the DGPS unit; And A user interface for checking a measured information or inputting an input signal. Sewage pipe inspection system using location information and sound waves. The method of claim 14, The sound wave generator A sound wave control unit for controlling the operation of the sound wave generation unit Sewage pipe inspection system using location information and sound waves. The method of claim 14, The sound wave measuring unit A sound wave measuring unit for converting the voice signal measured by the sound wave measuring unit into a digital signal Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The DGPS unit A location information receiver for receiving GPS location information; A DGPS processing unit for extracting synchronization information through GPS location information received by the location information receiving unit; A central processing unit which controls to provide the location information extracted by the DGPS processing unit to the sound wave measuring terminal or to provide information transmitted from the sound wave measuring terminal to the management terminal; and And a transmitter / receiver configured to transmit the location information extracted by the DGPS processor to the sound wave measurement terminal or to receive information transmitted from the sound wave measurement terminal. Sewage pipe inspection system using location information and sound waves. 10. The method of claim 9, The sound wave measurement terminal Is installed in the manhole of the sewer pipe, including a support device for supporting the sound wave measurement terminal Sewage pipe inspection system using location information and sound waves. The method of claim 19, The support device The basic frame installed in the manhole, It is fixed to adjust the installation position on the base frame, comprising a terminal mounting portion for fixing the sound wave measurement terminal to the base frame Sewage pipe inspection system using location information and sound waves. 21. The method of claim 20, The basic frame A horizontal length adjusting part supported on an inner surface of the manhole and configured to be adjustable in a horizontal direction in the basic frame; It is supported on the bottom surface of the manhole, and includes a vertical length adjustment portion configured to be adjustable in the vertical direction in the basic frame Sewage pipe inspection system using location information and sound waves. 21. The method of claim 20, The terminal mounting portion A holding part formed of a container having an upper surface open to which the sound wave measuring terminal is seated; Consists of a fastener and includes a position adjusting unit for fixing the holding unit to the base frame to adjust the installation position of the sound wave measurement terminal Sewage pipe inspection system using location information and sound waves. The method according to any one of claims 9 to 22, The DGPS unit and the sound wave measurement terminal are connected by wire or wirelessly Sewage pipe inspection system using location information and sound waves.

Images