KR101027410B1 - System for inspecting a wrong connecting of a drain pipe utilizing a positioning information and a electricity conductivity and method using the same - Google Patents

Abstract

The fault contact inspection system of sewage pipe using position information and electric conductivity measures the position information of the measuring point and generates the electrical signal and applies it to the sewage pipe, and the position information of the measuring point is measured by the specific resistance transmitting terminal. The resistance of the sewer pipe is calculated by calculating the impedance of the resistive receiving terminal for measuring the electrical signal, the DGPS unit for providing the synchronization information on the position information to the resistive transmitting terminal and the resistive receiving terminal, and the electrical signal detected by the resistive receiving terminal. It includes a management terminal to determine. In the method for inspecting sewage pipes using the positional information and electrical conductivity of the present invention, a current is applied to the sewage pipe, and the detected current is detected and analyzed to determine whether or not the sewage pipe is in error. According to the present invention configured as described above, it is possible to inspect various types of wrong contacts because the current is determined by sending a current, thereby reducing the inspection time.

Sewage pipe mis-contact, electrical conductivity, impedance

Description

SYSTEM FOR INSPECTING A WRONG CONNECTING OF A DRAIN PIPE UTILIZING A POSITIONING INFORMATION AND A ELECTRICITY CONDUCTIVITY AND METHOD USING THE SAME}

The present invention relates to a fault contact inspection system and inspection method of sewage pipes using positional information and electrical conductivity. More specifically, whether or not a sewage pipe is misaligned by using an electric conductivity caused by the impedance value of the sewage pipe measured by flowing an AC current through the sewer pipe. It relates to a fault contact inspection system and inspection method of sewage pipes using electrical conductivity.

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 streams and water pollution. 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 into sewers connected to sewer pipes, and the contact status of sewer pipes can be checked by observing whether tracers are detected in the manhole of each sewer.

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.

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.

According to a feature of the present invention for achieving the above object, the sewage pipe miscontact inspection method using the position information and electrical conductivity of the present invention is installed on both ends of the sewer pipe and resistive transmitter and non-resistance receiver for transmitting and receiving electricity or measuring the position information; And a position information and electrical conductivity including a DGPS unit for transmitting a synchronization signal for position information to the resistivity transmitter and the resistivity receiver, and a management terminal for determining whether the sewer pipe is in error by the information measured by the resistivity receiver. A method of determining whether a sewage pipe is in error by using a sewage pipe omission inspection system, the method comprising: an inspection condition input step of inputting an inspection condition for inspecting a sewage pipe in error; Position information measuring step of measuring the corrected position information of the resistivity transmitter and the resistivity receiver by extracting the synchronization information of the position information by GPS using the DGPS unit and transmitting to the resistivity transmitter and the resistivity receiver: the resistivity transmitter An electrical signal measuring step of transmitting and receiving an electrical signal using the resistivity receiver; It is preferable to include an error determination step of determining whether or not the sewage pipe is misaligned by calculating an impedance value corresponding to the electrical conductivity of the internal material of the sewage pipe through the electrical signal detected by the resistivity receiver.

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 resistivity transmitting terminal and the resistivity receiving terminal; and receiving the resistivity transmitting terminal and the resistivity based on the synchronization information transmitted to the resistivity transmitting terminal and the resistivity receiving terminal. It is preferable to include the step of measuring the corrected position information of the terminal.

The electrical signal measuring step of the present invention oscillates an electrical signal, and converts the analog signal based on the oscillated electrical signal and transmits it through the sewer pipe, and the analog signal transmitted by the electrical signal transmission step It is preferable to include an electrical signal receiving step of changing the digital signal to analyze the frequency.

The electrical signal transmission step of the present invention comprises the steps of oscillating the electrical signal at a predetermined time interval; Generating a digital signal based on the oscillated electrical signal; Converting the generated digital signal into an analog signal; and transmitting the converted analog signal through the sewer pipe.

In the step of converting the digital signal of the present invention into an analog signal, it is preferable to convert the digital signal into a voltage and convert the converted voltage back into a current.

Converting the digital signal of the present invention into an analog signal preferably includes amplifying the converted analog signal.

Preferably, the electrical signal receiving step includes converting a current generated in the electrical signal transmitting step into a digital signal, and analyzing a frequency by the converted digital signal.

The electric signal receiving step of the present invention preferably includes a step of detecting an analog signal generated in the electric signal transmitting step and amplifying only a predetermined frequency band to convert it into a digital signal.

The electric signal measuring step of the present invention preferably includes transmitting the position information measured by the position information measuring step and the electric signal information measured by the electric signal 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).

In the determination of whether or not the miscontact of the present invention calculates the impedance value through the current and voltage flowing through the internal material of the sewer pipe, whether the impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe is lower or higher than the expected impedance value It is preferable to determine whether or not the sewage pipe through the contact.

It is preferable to repeat the electric signal measurement step and the false contact determination step by changing the condition for the false contact result determined by the false contact determination step of the present invention.

Sewage pipe fault inspection system using the position information and electrical conductivity of the present invention is installed on one end of the sewage pipe, and transmits an electrical signal to the sewer pipe, the specific resistance transmission terminal for measuring the location information of the measurement area via GPS; A resistivity receiving terminal installed at the other end of the sewage pipe, receiving an electrical signal transmitted by the resistivity transmitting terminal, 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 resistivity transmitting terminal and the resistivity receiving terminal; and connected to the DGPS unit and measured by the resistivity transmitting terminal and the resistivity receiving terminal. It is preferable to include a management terminal for determining whether the sewage pipe is in error through the location information and the electrical signal information.

The management terminal of the present invention calculates an impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe through the electrical signal detected by the resistivity receiving terminal, and the impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe is expected. It is preferable to determine whether or not the sewage pipe is inaccurate based on whether the impedance value is lower or higher.

The management terminal of the present invention preferably sets the inspection section of the sewer pipe by substituting the position information measured by the resistivity transmitting terminal and the resistivity receiving terminal into a geographic information system (GIS).

It is preferable that the management terminal of the present invention is controlled to repeat the resistivity measurement of the resistivity transmitting terminal and the resistivity receiving terminal by changing the condition on the result of determining whether the sewage pipe is in error.

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.

Resistive transmission terminal of the present invention includes a location information receiver for measuring geographic information by GPS; An oscillator for oscillating a signal at regular time intervals; A signal generator which generates a digital signal based on the signal oscillated by the oscillator; A digital-analog signal converter converting the digital signal generated by the signal generator into an analog signal such as a voltage; A voltage-current converter for converting the voltage converted by the digital-analog signal converter into a current; It is preferable to include a central control unit for controlling components including the position information receiver, the oscillator, the signal generator, the digital-analog signal converter and the voltage-current converter.

The resistive transmission terminal of the present invention comprises: a memory unit for storing information by the position information receiver, the oscillator, the signal generator, the digital-analog signal converter, the voltage-current converter, and the central controller; Sending the information by the position information receiver, the oscillator, the signal generator, the digital-analog signal converter, the voltage-current converter, and the central controller to the DGPS unit or receive information transmitted from the DGPS unit Transmitting and receiving unit; and preferably comprises a user interface for checking the measured information or input the input signal.

The resistivity transmitting terminal of the present invention preferably includes an amplifier for amplifying the signal converted by the digital-analog signal converter.

Resistivity receiving terminal of the present invention comprises a position information receiver for measuring geographic information by GPS; An analog-to-digital signal converter for converting the current generated by the resistive transmission terminal into a digital signal; and preferably a frequency measuring unit for analyzing the frequency by the signal converted by the analog-to-digital signal converter.

The resistive receiving terminal of the present invention preferably further includes an amplifying filter unit which detects a current generated by the resistive transmitting terminal and amplifies only a predetermined frequency band and sends it to the analog-digital signal converter.

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 position information extracted by the DGPS processing unit to the resistivity transmitting terminal and the resistivity receiving terminal or to provide information transmitted from the resistivity receiving terminal to the management terminal; and extracted by the DGPS processing unit. It is preferable to include a transceiver for transmitting position information to the resistivity transmitting terminal and the resistive receiving terminal or receiving information transmitted from the resistive transmitting terminal and the resistive receiving terminal.

Preferably, the DGPS unit, the resistivity transmitting terminal, and the resistivity receiving terminal are connected by wire or wirelessly.

According to the fault contact inspection system and inspection method of the sewage pipe using the position information and the electrical conductivity according to the present invention, it is possible to inspect the various fault contact forms by determining the fault contact by sending a current, there is an advantage that the inspection time is shortened.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the fault contact inspection system and inspection method of the sewage pipe using the position information and electrical conductivity according to the present invention will be described in detail.

2 to 3 show a preferred embodiment of the fault contact inspection system and inspection method of the sewer pipe using the positional information and electrical conductivity according to the present invention.

Each object has its own specific resistivity, which is inversely related to the conductivity, which is a measure of how well the current flows through the material. The unit of electrical conductivity is Ωm in the MKS unit system.

In more detail about the conductivity, the rate at which electrons move through the material due to collisions with the surroundings does not continue to increase but remains within a constant value. The average value of these velocities is constant for each material and becomes a property of the material. That is, the average velocity of the electrons is proportional to the conductivity, and the resistivity, which is inversely related to the conductivity, has a constant value for each material.

And, the rainwater and sewage flowing in the sewage pipe corresponds to the electrolyte, so that it can flow electricity with a constant electrical conductivity. Therefore, the fault contact inspection system according to the present invention measures the impedance of the sewage pipe by measuring the impedance value according to the difference in the electrical conductivity characteristics of rainwater and sewage.

2 shows a miscontact inspection system according to the present invention. As shown, below the ground surface, a sewer pipe 10 for water treatment is embedded, and the sewer pipe 10 includes a rain pipe 11 for treating rainwater and a sewage pipe 13 for treating domestic wastewater.

One end of the sewer pipe 10 receives a GPS to search for location information and generates an electrical signal such as alternating current, thereby applying a resistive transmission terminal 20 for applying an electrical signal to a material such as fluid and foreign matter flowing in the sewer pipe 10. Install it.

The resistivity transmitting terminal 20 is provided with a location information receiver 21. The location information receiver 21 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 21 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 receiving unit 21 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 receiving unit 21. The distance from the satellite to the position information receiver 21 can know the propagation time by the time difference transmitted from each satellite and the time information received by the position information receiver 21, and the distance is calculated by multiplying the 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 21 is transmitted to the DGPS unit 50 by the central controller 33 and the transceiver 37 to be described below.

The resistivity transmitting terminal 20 is provided with an oscillator 23 such as an oscillator. The oscillator 23 is an element that oscillates a predetermined frequency by using an object such as a crystal and serves to generate an output signal at a predetermined time interval.

The resistivity transmitting terminal 20 is provided with a digital signal generator 25. The signal generator 25 generates a digital signal based on the periodic signal change received from the oscillator 23.

The electrical signal generated by the signal generator 25 is converted into an analog signal such as a voltage by the digital-analog signal converter 27. The digital-analog signal converter 27 may be configured as a DA converter, and converts a digital signal generated by the signal generator 25 into an analog signal such as a voltage to measure an impedance value. .

The voltage converted by the digital-analog signal converter 27 may be amplified by the amplifier 29 to a predetermined magnitude. The amplifier 29 is an apparatus for increasing the energy of an input signal and outputting a large energy change on the output side. Since the amplitude of the signal generated by the signal generator 25 is small, the amplifier 29 Amplified by 29).

The voltage amplified by the amplifier 29 is converted into a current by the voltage-current converter 31. The voltage-to-current converter 31 converts the voltage converted by the digital-analog signal converter 27 into a current so as to flow a current through the sewer pipe 10.

If the digital-analog signal converter 27 can directly convert an electrical signal into a current, the voltage-current converter 31 may be omitted. The voltage-current converter 31 may generate an alternating current of various frequency bands for convenience of inspection.

The resistivity transmitting terminal 20 is provided with a central control unit 33. The central controller 33 receives the location information through synchronization according to the synchronization information received from the DGPS unit 50 or the oscillator 23 and the signal under the control of the management terminal 60 to be described below. The operation of the generator 25, the digital-analog signal converter 27, the amplifier 29, and the voltage-current converter 31 is controlled.

The position information measured by the resistivity transmitting terminal 20, the electric signal generation state by the oscillator 23, and the like are stored in the memory unit 35. In addition, the specific resistance transmitting terminal 20 is provided with a transceiver 37 for transmitting information to the DGPS unit 50 or receiving information transmitted from the DGPS unit 50.

The resistivity transmitting terminal 20 is provided with a user interface 39 through which a user inputs an input signal and monitors the measured result.

And, the other end of the sewage pipe in which the resistivity transmitting terminal 20 is installed, the resistivity receiving terminal 40 is installed. The resistivity receiving terminal 40 is generated by the resistivity transmitting terminal 20 and serves to detect an alternating current flowing through the sewage pipe 10.

The resistivity receiving terminal 40 is provided with an amplifying filter 41. Since the alternating current flowing through the sewer pipe 10 has been transmitted from a distance, the size is also reduced and a lot of noise from the outside is mixed. Therefore, the amplification filter unit 41 amplifies the magnitude of AC and removes noise other than the frequency portion to be measured.

The signal processed by the amplification filter unit 41 is converted into a digital signal by the analog-digital signal converter 43. The analog-digital signal converter 43 is configured as an AD converter, and converts the analog signal into a digital signal so that it can be processed by the management terminal 60 to be described below.

The digital signal converted by the analog-digital signal converter 43 is processed by the frequency measurer 45. The frequency measuring unit 45 analyzes the frequency to be measured and obtains a voltage corresponding to the frequency signal applied by the resistivity transmitting terminal 20.

The resistivity receiving terminal 40 also includes a central control unit 33, a location information receiving unit 21, a user interface 39, a memory unit 35, and a transceiver 37.

The resistivity transmitting terminal 20 and the resistive receiving terminal 40 receive synchronization information regarding position information from the DGPS unit 50. The DGPS unit 50 measures positional information using DGPS (Differential GPS). DGPS is a relative positioning method of GPS surveying. The DGPS unit 50 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 50 is provided with a location information receiver 21 for receiving location information of the DGPS unit 50. The DGPS processor 51 extracts synchronization information about the location information through the location information received by the location information receiver 21.

That is, in order to accurately measure the position of the sewer pipe 10, synchronization information on the position information received by the resistivity transmitting terminal 20 and the resistivity receiving terminal 40 installed at 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 51 calculates synchronization information on the position signal, and transmits the synchronization information to the resistive transmitting terminal 20 and the resistive receiving terminal 40 to determine the exact position information.

The synchronization information calculated by the DGPS processing unit 51 is transmitted to the central control unit 33 in the resistivity transmitting terminal 20 and the resistivity receiving terminal 40 through the transceiver 37 provided in the DGPS unit 50. Is sent. The central control unit 33 obtains corrected position information by controlling the position information receiving unit 21 in the resistivity transmitting terminal 20 and the resistivity receiving terminal 40 through the synchronization information transmitted from the DGPS unit 50. Can be.

The DGPS unit 50 transmits the synchronization information calculated by the DGPS processing unit 51 to the resistivity transceiver terminals 20 and 40 or receives the position information or the electrical signal transmitted from the resistivity transceiver terminals 20 and 40. The central processing unit 53 for transmitting information and the like to the management terminal 60 to be described below is provided. The DGPS unit 50 may be connected to the management terminal 60 by wire or wireless.

The management terminal 60 prepares a sewage pipe map using the position information measured by the resistivity transmitting and receiving terminals 20 and 40, or a wrong contact of the sewage pipe through the electrical signal receiving information measured by the resistivity receiving terminal 40. Determine whether or not.

In order for the management terminal 60 to create a sewer pipe map, the geographical position of both ends of the sewer pipe 10 must be determined through the location information measured by the resistivity transmission / reception terminals 20 and 40. That is, the geographical position of both ends of the sewer pipe is designated to a Geographical Information System (GIS) previously stored in the management terminal 60 through the location information measured by the resistivity transmission and reception terminals 20 and 40.

Since the management terminal 60 includes not only general geographic information but also design information for sewer pipes, the management terminal 60 uses sewage pipe maps through geographic information and design information of the sewer pipe designated by the geographic information system. I can write it.

It is determined whether or not the sewage pipe is erroneously based on the electrical signal reception information measured by the resistivity receiving terminal 40. The result analyzed by the frequency measuring unit 45 of the resistivity receiving terminal 40 is transmitted to the management terminal 60 through the transceiver 37 and the DGPS unit 50. The management terminal 60 obtains an impedance value from the voltage and current obtained by the frequency measuring unit 45.

The relationship regarding the voltage V, the current I, and the impedance Z is as shown in Equation (1) below.

(1)

(One)

The relationship between the impedance Z, the resistance R, and the reactances X _L and X _C is expressed by Equation 2 below.

(2)

(2)

(X = X _L -X _C , X: total reactance)

On the other hand, the relationship between the resistance (R), the specific resistance (ρ) and the electrical conductivity (EC) is as shown in Equation (3) below.

(3)

(3)

(L: length, S: cross-sectional area)

Therefore, according to said formula (1), (2), and (3), following formula (4) can be obtained.

(4)

(4)

According to Equation (4), it can be seen that the impedance Z value is inversely proportional to the electrical conductivity EC. Therefore, the management terminal 60 can determine the characteristic of the water flowing in the sewer pipe 10 by measuring the impedance value that changes according to the sewage pipe or the excellent electrical conductivity flowing through the sewer pipe (10).

The management terminal 60 may be connected to the resistivity transmitting terminal 20 and the resistivity receiving terminal 40 by wire or wirelessly to control the devices. In addition, the management terminal 60 stores a numerical value for electrical conductivity for sewage and rain, so that the results detected by the resistivity receiving terminal 40 can be compared.

That is, the management terminal 60 predicts the impedance value corresponding to the electrical conductivity in advance according to whether the water in the sewage pipe 10 to be inspected is sewage or rainwater, and this is substantially inside the sewage pipe 10. It can be seen whether the sewage pipe 10 is in error by comparing with the impedance value measured by.

In addition, the management terminal 60 may output a detected result in a graph and graph to approximately indicate the probability of mis-contact. In addition, the management terminal 60 is provided with a separate user interface for displaying the processing results. The management terminal 60 may display the result of processing the electrical conductivity measured by the resistivity receiving terminal 40 and the analyzed electrical conductivity information through a user interface, and the sewer pipe determined through the analyzed electrical conductivity information. The contact status of can be provided with geographic information.

In addition, the management terminal 60 may provide a user with measurement contents such as an operation screen and an occurrence frequency control for the electrical signal generated by the resistivity transmitting terminal 20 through a user interface. In addition, the operation of the resistive transceiver terminals 20 and 40 may be controlled through the management terminal 60.

Hereinafter, the inspection method of the fault contact inspection system of the sewer pipe using the positional information and the electrical conductivity according to the present invention having the configuration as described above in detail.

Resistive transmission terminal 20 and the resistive receiving terminal 40 are respectively installed at both ends of the sewage pipe to be measured for mis-contact. When the non-resistance transceiver terminals 20 and 40 are installed, respectively, a test condition setting step such as a condition for synchronizing GPS position information or a type of electric signal, a test frequency and a detailed condition for the test through the management terminal 60 may be performed. Conduct.

When the inspection condition is set, the position information is received through GPS, and the synchronization information on the position information is extracted and transmitted to the resistivity transceivers 20 and 40, respectively.

First, after receiving location information through the location information receiver 21 provided in the DGPS unit 50, the DGPS processing unit 51 extracts the synchronization information. Then, the central processing unit 53 and the transmitting and receiving unit 37 of the DGPS unit 50 transmit the synchronization information to the resistivity transceivers 20 and 40. The resistivity transceivers 20 and 40 receive the corrected position information through the received synchronization information.

When the specific resistance transceivers 20 and 40 receive the position information, the specific resistance of the sewer pipe to be inspected is measured. First, the electrical resistance is generated by the resistive transmission terminal 20 under the control of the management terminal 60.

In this case, when there is no water in the sewer pipe 10, an electric signal may be generated while additionally flowing water to generate an electrolyte through which current may flow.

The oscillation unit 23 of the resistivity transmitting terminal 20 oscillates a signal at regular time intervals. The signal generator 25 generates a digital electric signal by the signal oscillated by the oscillator 23.

The electrical signal generated by the signal generator 25 is converted into a voltage by the digital-analog signal converter 27. In addition, the voltage converted by the digital-analog signal converter 27 is amplified by the amplifier 29 and then converted into a current by the voltage-current converter 31.

The current converted by the voltage-current converter 31 flows through internal materials such as sewage and rainwater in the sewer pipe 10. The sewage pipe 13 of the sewage pipe 10 flows wastewater such as food waste, manure, and the like, and the wastewater has high salt and nutrient chlorination states, so that the ionization state is relatively high and the electrical conductivity is high.

On the contrary, since rainwater flows in the rainwater pipe 11 containing relatively less foreign matter, the ionization state is not high and the electrical conductivity is low.

The current flowing through the sewer pipe 10 is detected by the resistivity receiving terminal 40 provided at the other end of the sewer pipe 10. Only the frequency of the required portion of the current passing through the amplification filter unit 41 of the resistivity receiving terminal 40 is amplified to remove noise.

In addition, the current passing through the amplification filter unit 41 is converted into a digital signal by the analog-digital signal converter 43. The digital signal converted by the analog-digital signal converter 43 is analyzed as a frequency by the frequency measurer 45.

The electrical signal analyzed by the frequency measuring unit 45 is stored in the memory unit 35 and then provided to the management terminal 60 through the transceiver unit 37 and the DGPS unit 50. When the information measured by the resistivity receiving terminal 40 is provided to the management terminal 60, the management terminal 60 determines whether the sewage pipe is erroneous through position information and electrical signal information to create a sewer pipe map.

First, the management terminal 60 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 resistivity transmission and reception terminal (20, 40). Check the sewer pipe section to be measured by substituting the position information measured by the resistivity transmission and reception terminals 20 and 40 into the geographic information system stored in the management terminal 60.

That is, since the geographic information system stored in the management terminal 60 includes not only general geographic information but also design information for sewage pipes buried underground, the geographic information system measures the position information measured by the resistivity transmission / reception terminals 20 and 40. You can set the sewer pipe section that you want to check whether there is a false contact.

When the section of the sewer pipe is set, the management terminal 60 determines whether the sewer pipe is in error by using the electrical signal measured by the resistivity receiving terminal 40. The management terminal 60 calculates impedance through voltage and current. Impedances calculated by the management terminal 60 are different from each other depending on the characteristics of the water in the sewer pipe 10 flowed through the current.

That is, when the measurement object is determined as an excellent pipe, the electrical conductivity in the rain pipe is constant at EC ₁ as shown in FIG. 4, and the electrical conductivity in the sewage pipe is constant at EC ₂ , more precisely, as mentioned above. However, the sewage in the sewage pipe has a high ionization state and thus has high electrical conductivity, so that the impedance value is lower than that of the rain pipe.

Therefore, when measuring the impedance of the rain pipe, a high impedance value corresponding to the electrical conductivity (EC ₁ ) of the rain water will be measured if the sewage pipe is not miscontacted. On the contrary, when the impedance of the rain pipe is measured, if the sewage pipe is erroneously contacted, the sewage may flow into the rainwater, resulting in an increased ionization state (EC ₃ ), thereby lowering the impedance value (EC ₃ ).

For example, the theoretical conductivity of pure water is 0.056 (μS / cm), and the water conductivity of water with the same level of ionization as the Han River is 100 to 200 (μS / cm). Therefore, the management terminal 60 can probably determine whether or not the sewer pipe 10 is contacted by an impedance value that varies depending on the electrical conductivity of water flowing in the sewer pipe 10.

Even after the management terminal 60 determines whether or not the sewage pipe is erroneous, if the result is ambiguous to determine whether the erroneous or unsuccessful, or if you want to re-examine under different electrical signal conditions, the above-mentioned electrical signal measuring step and the erroneous determination step Can be repeated.

If the mismanagement of the inspection section of the sewer pipe is inspected by the management terminal 60, it is possible to create a sewer pipe map based on the result. That is, the user can monitor the test 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 60.

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 claims which will be described later. .

According to the fault contact inspection system and inspection method of the sewage pipe using the location information and electrical conductivity according to the present invention as described above has the following advantages.

First, the inspection process is not affected by the external environment such as the meteorological environment, and any contact form can be inspected as long as the current flows.

In addition, since only a current is supplied to the sewer pipe, the inspection is possible, thereby reducing the inspection time, thereby providing a rapid inspection.

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 cross-sectional view showing a preferred embodiment of the fault contact inspection system and inspection method of the sewer pipe using the position information and electrical conductivity according to the present invention.

3 is a block diagram of a fault contact inspection system and inspection method of the sewer pipe using the position information and electrical conductivity according to the present invention.

4 is a measurement state diagram showing a process of measuring the state of the sewage pipe is not erroneous using the fault contact inspection system and inspection method of the sewer pipe using the position information and electrical conductivity according to the present invention.

5 is a measurement state diagram showing a process of measuring the state of the sewage pipe is erroneous using a fault contact inspection system and inspection method of the sewer pipe using the position information and electrical conductivity according to the present invention.

Figure 6 is a flow chart showing the operation sequence of the fault contact inspection method of the sewer pipe using the position information and electrical conductivity according to the present invention.

       Description of the Related Art [0002]

20: resistivity transmitting terminal 21: location information receiving unit

23: oscillator 25: signal generator

27: digital-analog signal conversion unit 29: amplification unit

31: voltage-current converter 33: central control unit

35: memory 37: transceiver

39: user interface 40: resistivity receiving terminal

41: amplification filter unit 43: analog-digital signal conversion unit

45: frequency measuring unit 50: DGPS unit

51: DGPS processing unit 53: central processing unit

60: management terminal

Claims (25)

A resistivity transmitter and a resistivity receiver installed at both ends of the sewer pipe for transmitting and receiving electricity or measuring position information, a DGPS unit for transmitting a synchronization signal for position information to the resistivity transmitter and the resistivity receiver, and measured by the resistivity receiver. In the method of determining whether the sewage pipe is wrong by using the sewage pipe failure inspection system using the location information and electrical conductivity including the management terminal to determine whether the sewage pipe is wrong contact with the information, 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 resistivity transmitter and the resistivity receiver by extracting the synchronization information of the position information by GPS using the DGPS unit and transmitting to the resistivity transmitter and the resistivity receiver: An electrical signal measuring step of transmitting and receiving an electrical signal using the resistivity transmitter and the resistivity receiver; And a step of determining whether or not the sewage pipe is misaligned by calculating an impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe through the electrical signal detected by the resistivity receiver. Sewage pipe fault contact method using location information and electrical conductivity. 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 fault contact method using location information and electrical conductivity. 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 resistivity transmitting terminal and the resistivity receiving terminal; And Measuring corrected position information of the resistivity transmitting terminal and the resistivity receiving terminal based on the synchronization information transmitted to the resistivity transmitting terminal and the resistivity receiving terminal; Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 1, The electrical signal measuring step An electric signal transmitting step of oscillating an electric signal and converting the electric signal into an analog signal based on the oscillated electric signal and transmitting the same through the sewer pipe; An electrical signal receiving step of analyzing the frequency by changing the analog signal transmitted by the electrical signal transmission step into a digital signal; Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 4, wherein The electrical signal transmitting step Oscillating an electrical signal at regular time intervals; Generating a digital signal based on the oscillated electrical signal; Converting the generated digital signal into an analog signal; and Transmitting the converted analog signal through the sewer pipe; Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 5, Converting the digital signal into an analog signal To convert a digital signal into a voltage, Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 5, Converting the digital signal into an analog signal Amplifying the converted analog signal Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 6, The electrical signal receiving step Converting the current generated in the electrical signal transmission step into a digital signal; Analyzing the frequency by the converted digital signal; Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 8, The electrical signal receiving step Detecting an analog signal generated in the electrical signal transmission step and amplifying only a predetermined frequency band to convert the analog signal into a digital signal; Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 1, The electrical signal measuring step Transmitting the position information measured by the position information measuring step and the electric signal information measured by the electric signal measuring step to the DGPS unit. Sewage pipe fault contact method using location information and electrical conductivity. 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 fault contact method using location information and electrical conductivity. The method of claim 1, The step of determining whether or not The impedance value is calculated from the current and voltage flowing through the internal material of the sewer pipe, Determining whether the sewage pipe is inaccurate based on whether the impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe is lower or higher than the expected impedance value. Sewage pipe fault contact method using location information and electrical conductivity. The method of claim 1, By repeating the electric signal measuring 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 fault contact method using location information and electrical conductivity. A resistivity transmitting terminal installed at one end of the sewage pipe, transmitting an electrical signal to the sewage pipe, and measuring position information of the measurement area through GPS; Resistivity receiving terminal, which is installed at the other end of the sewer pipe, receives an electrical signal transmitted by the resistivity transmitting terminal and measures position 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 resistivity transmitting terminal and the resistivity receiving terminal; And And a management terminal connected to the DGPS unit and determining whether the sewage pipe is in error by using the position information and the electrical signal information measured by the resistivity transmitting terminal and the resistivity receiving terminal. Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 14, The management terminal is The impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe is calculated based on the electrical signal detected by the resistivity receiving terminal, and the impedance value corresponding to the electrical conductivity of the internal material of the sewer pipe is lower than the expected impedance value. Determine whether or not the sewage pipe is in contact through the high Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 14, The management terminal is The inspection section of the sewer pipe is set by substituting the position information measured by the resistivity transmitting terminal and the resistivity receiving terminal into a geographic information system (GIS). Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 14, The management terminal is By changing the condition on the result of the determination of the faulty contact of the sewer pipe, the control is performed to repeat the resistivity measurement of the resistive transmitting terminal and the resistive receiving terminal. Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 14, The management terminal is The sewage pipe map is created based on the result of judgment Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 14, The resistivity transmitting terminal A location information receiver for measuring geographic information by GPS; An oscillator for oscillating a signal at regular time intervals; A signal generator which generates a digital signal based on the signal oscillated by the oscillator; A digital-analog signal converter converting the digital signal generated by the signal generator into an analog signal such as a voltage; A voltage-current converter for converting the voltage converted by the digital-analog signal converter into a current; And a central controller for controlling components including the position information receiver, the oscillator, the signal generator, the digital-analog signal converter, and the voltage-current converter. Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 19, The resistivity transmitting terminal A memory unit for storing information by the position information receiver, the oscillator, the signal generator, the digital-analog signal converter, the voltage-current converter, and the central controller; Sending the information by the position information receiver, the oscillator, the signal generator, the digital-analog signal converter, the voltage-current converter, and the central controller to the DGPS unit or receive information transmitted from the DGPS unit Transmitting and receiving unit; And A user interface for checking a measured information or inputting an input signal. Sewage pipe fault inspection system using location information and electrical conductivity. 21. The method of claim 20, The resistivity transmitting terminal And an amplifier for amplifying the signal converted by the digital-analog signal converter. Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 19, The resistivity receiving terminal A location information receiver for measuring geographic information by GPS; An analog-digital signal converter for converting a current generated by the resistivity transmitting terminal into a digital signal; and It includes a frequency measuring unit for analyzing the frequency by the signal converted by the analog-digital signal converter Sewage pipe fault inspection system using location information and electrical conductivity. The method of claim 22, The resistivity receiving terminal The amplification filter unit for detecting the current generated by the resistive transmission terminal and amplifies only a predetermined frequency band and sends it to the analog-to-digital signal converter; False contact inspection system using location information and electrical conductivity The method of claim 14, 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 for providing the location information extracted by the DGPS processing unit to the resistivity transmitting terminal and the resistivity receiving terminal or providing information transmitted from the resistivity receiving terminal to the management terminal; and And a transmitting / receiving unit configured to transmit the position information extracted by the DGPS processing unit to the resistivity transmitting terminal and the resistivity receiving terminal or to receive information transmitted from the resistivity transmitting terminal and the resistivity receiving terminal. Sewage pipe fault inspection system using location information and electrical conductivity. The method according to any one of claims 14 to 24, The DGPS unit, the resistivity transmitter and the resistive receiver are connected by wire or wirelessly. Sewage pipe fault inspection system using location information and electrical conductivity.

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