CN115248454A - Underground pipeline positioning system and method based on electronic marker - Google Patents
Underground pipeline positioning system and method based on electronic marker Download PDFInfo
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- CN115248454A CN115248454A CN202210784282.3A CN202210784282A CN115248454A CN 115248454 A CN115248454 A CN 115248454A CN 202210784282 A CN202210784282 A CN 202210784282A CN 115248454 A CN115248454 A CN 115248454A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention provides an underground pipeline positioning system and method based on an electronic marker. The system comprises a detector which can move on the ground and an electronic marker which is buried around the underground nonmetal pipeline at certain intervals; the detector is used for transmitting electromagnetic signals to the underground, receiving response signals returned by the electronic marker, analyzing characteristic information data containing pipeline attributes from the response signals, realizing positioning of the underground pipeline based on the intensity of the response signals and coordinate data obtained by a built-in GPS module, and identifying the use and the attributes of the pipeline based on the characteristic information data. By arranging the detecting instrument and the electronic marker, the underground pipeline detection and positioning can be realized in a response mode, and the pipeline attribute can be identified; the response signal data improves the detection distance by adopting improved phase coding; compared with a ground penetrating radar, the equipment cost and the power consumption are reduced.
Description
Technical Field
The invention belongs to the technical field of wireless positioning, and particularly relates to an underground pipeline positioning system and method based on an electronic marker.
Background
Natural gas and a plurality of underground pipelines for water supply, drainage, heating power, electric power, communication, radio and television, industry and the like form a 'lifeline' for guaranteeing urban operation. At present, most municipal pipelines are laid in a pipe trench excavation mode, and the burial depth is different according to different road surface conditions. The burial depth of a common gas pipeline is less than 1.5 meters; the buried depth of the pipeline at the intersection is 2-3 m. The trenchless mode is adopted under the conditions of crossing (rivers, lakes, important traffic trunks, important buildings) or burying more than 3 meters. The non-excavation mode is higher in cost, and is easy to be mistakenly excavated in the construction process, so that other pipelines are damaged. Due to the defects, trenchless engineering is increasingly reduced, and a pipe trench digging mode is mostly adopted in pipeline engineering. In some international super-large cities, in recent years, cities are in a rapid construction and development stage, underground pipelines in various industries are more and more, and the underground pipelines are more and more crossed and more complex due to construction influence. When the underground pipelines are laid, the underground pipelines are mutually hidden, the laying depth is increased, and therefore more and more pipelines are buried to the depth of 1.5-3 m.
Because underground pipelines are huge and complex and are criss-cross, accidents are caused by the construction damage of a third party. Therefore, the accurate positioning detection of the pipeline is realized by utilizing the underground pipeline electronic positioning system, so that the accidents of 'pipe explosion by digging' and wrong digging are avoided, and the damage risk of a third party is reduced, which is very important. At present, in the prior art, underground pipelines are positioned by utilizing ground penetrating radars. The ground penetrating radar, also called ground penetrating radar, geological radar, has a frequency of 10 6 -10 9 H Z Determining the underground medium composition by radio wavesA nondestructive detection method of cloth. The technical principle is as follows: the high-frequency electromagnetic waves are transmitted to the underground through the transmitting antenna, the electromagnetic waves reflected back to the ground are received, the electromagnetic waves are reflected when encountering a boundary surface with electrical property difference when propagating in the underground medium, and the spatial position, the structure, the form and the burial depth of the underground medium are deduced according to the characteristics of the received electromagnetic waves, such as waveform, amplitude intensity, time change and the like. The ground penetrating radar can be well applied to positioning and detecting of buried pipelines, but the mode has great limitation, and the purpose and the attribute of the pipelines cannot be known from radar images. To determine whether a pipeline is a certain pipeline, it is also necessary to combine the data of the drawing file for analysis. And to effectively detect buried deep underground pipelines, strong radar transmission signal power is needed, power consumption is high, and equipment cost is high.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an underground pipeline positioning system and method based on an electronic marker.
In order to achieve the above object, the present invention adopts the following technical solutions.
In a first aspect, the invention provides an underground pipeline positioning system based on an electronic marker, which comprises a detector capable of moving on the ground and the electronic marker buried around an underground nonmetal pipeline at a certain interval; the detector is used for transmitting electromagnetic signals to the underground, receiving response signals returned by the electronic marker, analyzing characteristic information data containing pipeline attributes from the response signals, positioning the underground pipeline based on the intensity of the response signals and coordinate data obtained by the built-in GPS module, and identifying the use and the attributes of the pipeline based on the characteristic information data.
Further, the response signal data adopts improved phase coding, and the data storage method in the storage unit of the electronic marker comprises the following steps: 1-bit binary '0' is stored as 4-bit binary '0000', 1-bit binary '1' is stored as 4-bit binary '1010', and one byte of 8-bit data is stored as 32-bit data; the detector analyzes 32bit data from the response signal and then decodes the 32bit data to obtain 8bit data.
Furthermore, an electronic marker is buried in the straight line part of the underground pipeline every 50 meters; an electronic marker is respectively embedded in the special positions of the underground pipeline including an elbow, a tee joint, a T-shaped structure and a valve.
Furthermore, the electronic marker buried at a depth of 1.5 m adopts a ferrite core column antenna, and the electronic marker buried at a depth of 2.4 m or 3m adopts a disk antenna.
Furthermore, the electronic marker buried in the depth of 2.4 meters and 3 meters is installed in a circular shell with the height of 3cm and the diameter of 38cm, the circular shell adopts a structure with high periphery and low middle, and the antenna of the electronic marker is arranged at the periphery of the circular shell.
Further, the system also comprises a cloud server for storing a pipeline parameter database, and the detector can store and maintain the pipeline information by accessing the database.
Still further, the probe includes: the system comprises a microprocessor, a transmitting unit, a receiving unit, a GPS module, a GIS interface and a wireless communication module which are connected with the microprocessor, and further comprises a shared antenna connected with the transmitting unit and the receiving unit.
Still further, the transmitting unit includes a signal generating circuit, a filtering circuit, and a signal amplifying circuit.
Still further, the receiving unit includes a signal extraction circuit, a demodulation filter circuit, and a signal processing circuit.
In a second aspect, the invention provides a method for positioning an underground pipeline by using the system, which comprises the following steps:
the detector transmits an electromagnetic signal to the underground in real time;
the electronic identifier receives the electromagnetic signal and immediately returns a response signal containing the pipeline characteristic information data;
the detector receives the response signal and analyzes the pipeline characteristic information data from the response signal;
the detector realizes the positioning of the underground pipeline based on the intensity of the response signal and the coordinate data obtained by the built-in GPS module, and identifies the use and the attribute of the pipeline based on the characteristic information data.
Compared with the prior art, the invention has the following beneficial effects.
The invention arranges a detector which can move on the ground and an electronic marker which is embedded around the underground nonmetal pipeline at certain intervals; the detector is used for transmitting electromagnetic signals to the underground, receiving response signals returned by the electronic marker, analyzing characteristic information data containing pipeline attributes from the response signals, positioning the underground pipeline based on the intensity of the response signals and coordinate data obtained by the built-in GPS module, and identifying the use and the attributes of the pipeline based on the characteristic information data. By arranging the detecting instrument and the electronic marker, the underground pipeline detection and positioning can be realized in a response mode, and the pipeline attribute can be identified; the response signal data improves the detection distance by adopting improved phase coding; compared with a ground penetrating radar, the equipment cost and the power consumption are reduced.
Drawings
Fig. 1 is a schematic structural diagram of an underground pipeline positioning system based on an electronic identifier according to an embodiment of the present invention, in which: the method comprises the following steps of 1-detecting instrument, 2-electronic marker and 3-cloud server.
Fig. 2 is a schematic structural view of an electronic marker mounting case.
Fig. 3 is a schematic structural diagram of the detecting instrument and the electronic marker.
Fig. 4 is a schematic diagram of a signal extraction circuit.
Fig. 5 is a schematic diagram of a demodulation filter circuit.
Fig. 6 is a waveform diagram of phase encoding.
Fig. 7 is a schematic diagram of phase encoding waveforms when data is continuous 0 and alternating 1 and 0.
FIG. 8 is a flow chart of a method for locating underground pipes using the system according to an embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of the emission unit of the detector.
Fig. 10 is a schematic diagram of a third-order RC filter circuit of the emission unit of the detector.
Fig. 11 is a schematic diagram of a series resonant circuit of the transmitting unit of the detecting instrument.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the present invention is further described below with reference to the accompanying drawings and the detailed description. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an underground pipeline positioning system based on an electronic marker 2 according to an embodiment of the present invention, including a detector 1 movable on the ground and electronic markers 2 buried around an underground nonmetallic pipeline at certain intervals; the detector 1 is used for transmitting electromagnetic signals to the underground, receiving response signals returned by the electronic identifier 2, resolving characteristic information data containing pipeline attributes from the response signals, positioning the underground pipeline based on the intensity of the response signals and coordinate data obtained by a built-in GPS module, and identifying the use and the attributes of the pipeline based on the characteristic information data.
In this embodiment, the system mainly includes a detecting instrument 1 and an electronic marker 2, as shown in fig. 1. These two parts will be described separately below.
The detector 1 is mainly used for detecting and positioning underground pipelines. The detector 1 is a portable device and can be held by a worker to move on the ground above the buried underground pipeline; or can be fixed on the vehicle carrier and move along with the vehicle carrier. When the device works, the detector 1 transmits electromagnetic signals to the underground in real time, receives response signals from the electronic marker 2, and analyzes characteristic information data containing pipeline attributes from the received response signals after the received response signals are converted and amplified; the depth of the electronic marker 2 is roughly determined according to the intensity of the response signal, and then the underground pipeline can be positioned by combining the coordinate data (obtained by a GPS module) of the detecting instrument 1. Since the characteristic information data of the pipeline contains the attribute parameters of the pipeline, the attribute and the use of the pipeline at the positioning point, such as a tee joint, an elbow and the like, can be identified based on the characteristic information data. Unlike the ground penetrating radar operating in a self-sending and self-receiving mode (receiving the reflected signal of the self-sent signal), the system of this embodiment operates in a response mode, that is, the detecting instrument 1 sends a signal to the electronic identifier 2, and the electronic identifier 2 returns a response signal to the detecting instrument 1 after receiving the sent signal. Compared with a self-transmitting and self-receiving mode, the response mode avoids ground reflection loss, so that the requirement on the power of a transmitted signal can be greatly reduced, and the equipment cost and the power consumption are reduced.
And the electronic marker 2 is mainly used for receiving the emission signal of the detecting instrument 1 and returning a response signal. The electronic marker 2 is buried around the underground pipeline during pipeline construction, and is equivalent to marks made on the pipeline, and the detector 1 realizes the positioning of the pipeline by detecting and positioning the marks. The electronic marker 2 of the embodiment is a marker which works in a low frequency band (125 kH) Z ) The RFID tag of (1). The RFID tag is a non-contact read-write card and has the advantages of high read speed, small volume, light weight, low cost, long service life and the like. The low-frequency RFID technology is insensitive to conditions such as high temperature, high humidity and pollution, can be applied to various severe environments, and has been developed very well. The RFID tag mainly comprises a power supply module, a logic module, a storage unit (EEPROM), a clock module, a data extraction module, a modulation module, an antenna and the like. The power supply module integrates an AD/DC converter and can extract direct-current power from a radio frequency field. The clock module can generate a system clock through the radio frequency field, and the data extraction module can detect data from the amplitude modulated field. The logic modules include controllers, configuration registers, sequencers, encoders, command decoders, and the like. The storage unit of the embodiment stores characteristic information data containing pipeline attributes, wherein the characteristic data information mainly comprises pipeline diameters, burying time, special positions and surrounding buildings, and the special positions comprise elbows, tees, T-shaped structures and valves. Specifically, the electronic marker 2 is mounted in a sealed housing member, including an antenna unit, a capacitor unit, and a chip member. Wherein the housing seals other component units in the housing, and the antenna unit is connected in parallel with the capacitor unit circuitAnd two ends of the antenna are connected with two antenna pins of the chip.
As an alternative embodiment, the response signal data is encoded by using a modified phase code, and the data storage method in the storage unit of the electronic identifier 2 is as follows: 1-bit binary '0' is stored as 4-bit binary '0000', 1-bit binary '1' is stored as 4-bit binary '1010', and one byte of 8-bit data is stored as 32-bit data; the detector 1 analyzes 32-bit data from the response signal and decodes the 32-bit data to obtain 8-bit data.
The embodiment provides a method for coding feature data information. In the prior art, data encoding of the RFID tag generally adopts phase encoding. The phase coding is also called split phase code and synchronous code, which divides code elements into two equal intervals, if the coded data bit is '1', the code bit is in negative jump, otherwise, the code bit is in positive jump; at the beginning of the coded bit, if the coded data bit is "1", it is high, otherwise it is low. Fig. 6 gives a timing diagram of the clock signal, binary data and the corresponding phase encoding. As can be seen from fig. 6, the phase code is a pulse signal (both the period and the pulse width are not fixed) between phases having a pulse width of 0.5T, T (T is the clock signal period). In practice, it is found that, in response signal data using phase encoding, since the response signal received by the detecting instrument 1 is weak, the decoded data is often mistaken due to noise interference, thereby affecting the detection distance, and generally, the electronic marker 2 with a depth of 3 meters cannot be effectively detected. The monitoring of the voltage timing waveform of the reply signal indicates that much of the interference occurs at the rising or falling edge of the encoded signal. After repeated experiments, the detection distance of the detector 1 is obviously improved when the coded signal is a square wave signal with a period of T or 2T, and the effective detection distance can reach more than 3 meters (probably because the hardware circuit has stronger capability of processing regular signals than irregular signals). And the corresponding data at this time is consecutive 0 or 1, 0 alternating as shown in fig. 7. To this end, the present embodiment proposes an improved phase encoding method, which extends a 1-bit binary code to 4 bits, specifically, extends "0" to "0000" and extends "1" to "1010". The binary data processed in this way frequently has a plurality of continuous 0 or 1, 0 alternation, thus enhancing the anti-noise interference ability and further improving the detection distance.
As an alternative embodiment, an electronic marker 2 is buried every 50 meters in the straight line part of the underground pipeline; an electronic marker 2 is respectively embedded at the special positions of the underground pipeline including an elbow, a tee joint, a T-shaped structure and a valve.
This embodiment shows a technical solution for embedding the electronic marker 2. The electronic markers 2 are embedded at approximately equal intervals along the underground pipeline, and one electronic marker is embedded at intervals of 50 meters in the straight line part of the underground pipeline; one of the elbow, the tee joint, the T-shaped structure and the valve is respectively embedded at each special position. It should be noted that this embodiment is only a preferred embodiment, and does not negate or exclude other possible embodiments, for example, the embedding distance of the electronic marker 2 may not be 50 meters, and may also be embedded at unequal intervals.
As an alternative embodiment, the electronic marker 2 buried at a depth of 1.5 m employs a ferrite core column antenna, and the electronic marker 2 buried at a depth of 2.4 m or 3m employs a disk antenna.
The embodiment provides a technical scheme for selecting the antennas of the electronic marker 2 with different burying depths. Because the different depths of soil have different effects on the antenna performance, and in order to meet the requirements for detection distance, the deeper the electronic marker 2 is buried, the better the antenna performance should be, and therefore, different depths of the electronic marker 2 should be used. In the embodiment, a ferrite core cylindrical antenna is adopted at the depth of 1.5 m; the disk antennas are used at the depths of 2.4 meters and 3 meters, but the performance of the disk antenna with the depth of 3 meters is better than that of the disk antenna with the depth of 2.4 meters. Various antenna parameters are shown in tables 1 and 2.
TABLE 1
| Specification of | Inductor (mH) | Capacitor (pF) | Resistance (omega) | Q |
| 3M2.4 m buried depth single strand | 11.044 | 213.9 | 155.44 | 48.1 |
| High temperature resistant 100 m | 10.55 | 240.1 | 212.2 | 31.2 |
| Multi-strand coaxial line 100 m | 9.974 | 254.2 | 93.88 | 69.3 |
| The diameter of the single strand of the enameled wire is 0.5 | 8.488 | 298.4 | 245.1 | 21.6 |
TABLE 2
| Marker antenna | Inductor (mH) | Capacitor (pF) | Resistance (omega) | Q |
| 3m | 3.037 | 834 | 3.65 | 233 |
| 2.4 m | 2.98 | 850 | 3.67 | 267 |
| 1.5 m | 3.177 | 797.1 | 1.18 | 434 |
As an optional embodiment, the electronic marker 2 buried in a depth of 2.4 meters and 3 meters is installed in a circular housing with a height of 3cm and a diameter of 38cm, the circular housing adopts a structure with a high periphery and a low middle, and the antenna of the electronic marker 2 is arranged at the periphery of the circular housing.
The embodiment provides a technical scheme of the shell of the electronic identifier 2. The electronic marker 2 of the present embodiment buried at a depth of 2.4 m or 3m is installed in a circular housing. The periphery of the circular shell is high, the middle is low, and the periphery is high, and is used for placing an antenna; the middle is low, so that the interior of the shell is not empty, and the bearing requirement of soil is met. The dimensions of the housing were 3cm in height and 38cm in diameter. Two interfaces for fixing are arranged outside the shell. The shell is provided with a port for the antenna to enter and exit, and when the antenna and other units are placed in the shell, the shell is sealed. The structure of the housing is shown in fig. 2. The shell protection rating is IP68.
As an optional embodiment, the system further includes a cloud server 3 that stores a database of pipeline parameters, and the detector 1 accesses the database to store and maintain the pipeline information.
The embodiment provides a technical scheme for data interaction between the detecting instrument 1 and the cloud server 3. The database of the cloud server 3 stores the pipeline parameter data, the detector 1 of the embodiment can perform data communication with the cloud server 3 through the internet, and the storage and maintenance of the pipeline information are realized by accessing the database. As shown in fig. 1.
As an alternative embodiment, the detector 1 comprises: the system comprises a microprocessor, a transmitting unit, a receiving unit, a GPS module, a GIS interface and a wireless communication module which are connected with the microprocessor, and further comprises a shared antenna connected with the transmitting unit and the receiving unit.
This embodiment shows a technical solution of the detecting instrument 1. The detecting instrument 1 of the present embodiment is mainly composed of a microprocessor, a transmitting unit, a receiving unit, a GPS module, a GIS interface, and a wireless communication module, and the connection relationship of the modules is shown in fig. 3. The microprocessor is a data processing and control center of the detecting instrument 1, is mainly used for realizing various data processing tasks, and coordinates the work of each module by outputting various control signals. The transmitting unit is used for generating sine wave signals with certain intensity under the control of the microprocessor and transmitting the sine wave signals through the antenna. The receiving unit is used for amplifying and converting the response signal from the electronic identifier 2 received by the antenna and sending the analyzed characteristic data information to the microprocessor. The wireless communication module is used for realizing data communication between the detector 1 and the cloud server 3. The GPS module is used for acquiring coordinate data of the detector 1 in real time. The GIS interface is used for connecting the electronic map and matching with the markers such as buildings in the electronic map.
As an alternative embodiment, the transmitting unit includes a signal generating circuit, a filtering circuit and a signal amplifying circuit.
This embodiment provides a technical solution of a transmitting unit. The transmitting unit of the present embodiment is mainly composed of a signal generating circuit, a filter circuit, and a signal amplifying circuit, as shown in fig. 9. The signal generating circuit of the embodiment is a PWM functional unit inside the microprocessor, and outputs a pulse signal with an adjustable duty ratio. The pulse signal may be decomposed into the sum of an infinite number of sine wave signals (fundamental wave, second harmonic wave, third harmonic wave, etc.) different in frequency, which are input to a filter circuit to obtain a fundamental wave sine signal. Fig. 10 shows a third order RC filter circuit. Because the signal output by the filter circuit is weak, the signal input by the filter circuit needs to be amplified by the signal amplifying circuit so as to meet the requirement of detection distance. The output of the signal amplification circuit is connected to a transmitting antenna using a series resonant circuit, and the schematic circuit diagram thereof is shown in fig. 11.
As an alternative embodiment, the receiving unit includes a signal extraction circuit, a demodulation filtering circuit, and a signal processing circuit.
This embodiment provides a technical solution of a receiving unit. The receiving unit of the present embodiment is mainly composed of a signal extraction circuit, a demodulation filter circuit, and a signal processing circuit. The signal extraction circuit is connected with the receiving and transmitting shared antenna and is used for extracting a return signal from the antenna. Fig. 4 shows a specific signal extraction circuit configuration. The electronic marker 2 works in an amplitude modulation mode, and the demodulation filter circuit is used for extracting amplitude modulation wave signals in response signals returned by the electronic marker 2. The demodulation filter circuit is actually a one-stage diode detector circuit, and as shown in fig. 5, is composed of a diode D and an RC low-pass filter circuit. The signal processing circuit is mainly used for amplifying the voltage signal output by the demodulation filter circuit to a certain amplitude, and converting the analog voltage signal into a digital signal which can be processed by the microprocessor through the first-stage A/D converter.
Fig. 8 is a flow chart of a method for positioning an underground pipeline by using the system, which comprises the following steps:
102, the electronic identifier 2 receives the electromagnetic signal and immediately returns a response signal containing the pipeline characteristic information data;
103, the detector 1 receives the response signal and analyzes the pipeline characteristic information data from the response signal;
and step 104, the detector 1 realizes positioning of the underground pipeline based on the response signal intensity and the coordinate data obtained by the built-in GPS module, and identifies the pipeline use and attribute based on the characteristic information data.
Compared with the technical solution of the embodiment of the apparatus shown in fig. 1, the method of this embodiment has similar implementation principle and technical effect, and is not described herein again.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An underground pipeline positioning system based on an electronic marker is characterized by comprising a detector capable of moving on the ground and the electronic marker buried around an underground nonmetal pipeline at certain intervals; the detector is used for transmitting electromagnetic signals to the underground, receiving response signals returned by the electronic marker, analyzing characteristic information data containing pipeline attributes from the response signals, realizing positioning of the underground pipeline based on the intensity of the response signals and coordinate data obtained by a built-in GPS module, and identifying the use and the attributes of the pipeline based on the characteristic information data.
2. An electronic marker-based underground pipe locating system according to claim 1, wherein the response signal data is encoded by a modified phase, and the data storage method in the storage unit of the electronic marker is as follows: 1-bit binary '0' is stored as 4-bit binary '0000', 1-bit binary '1' is stored as 4-bit binary '1010', and one byte of 8-bit data is stored as 32-bit data; the detector analyzes 32bit data from the response signal and then decodes the 32bit data to obtain 8bit data.
3. An electronic marker-based underground pipe locating system as claimed in claim 1 wherein, in the straight section of the underground pipe, an electronic marker is buried every 50 meters; an electronic marker is respectively embedded in the special positions of the underground pipeline including an elbow, a tee joint, a T-shaped structure and a valve.
4. An electronic marker-based underground pipe locating system as claimed in claim 1, wherein the electronic marker buried at a depth of 1.5 m is a ferrite core column antenna, and the electronic marker buried at a depth of 2.4 m or 3m is a disk antenna.
5. An underground pipeline positioning system based on an electronic marker as claimed in claim 4, wherein the electronic marker buried at a depth of 2.4 m and 3m is installed in a circular housing with a height of 3cm and a diameter of 38cm, the circular housing has a structure with a high periphery and a low middle, and the antenna of the electronic marker is arranged at the periphery of the circular housing.
6. An electronic marker-based underground pipe locating system according to claim 1, further comprising a cloud server storing a database of pipe parameters, wherein the detectors enable storage and maintenance of pipe information by accessing said database.
7. An electronic marker-based underground pipe locating system according to claim 6, wherein the sonde comprises: the device comprises a microprocessor, a transmitting unit, a receiving unit, a GPS module, a GIS interface and a wireless communication module which are connected with the microprocessor, and a shared antenna connected with the transmitting unit and the receiving unit.
8. An electronic marker-based underground pipe locating system as claimed in claim 7, wherein said transmitting unit includes a signal generating circuit, a filtering circuit and a signal amplifying circuit.
9. An electronic marker-based underground pipe locating system as claimed in claim 8, wherein said receiving unit includes signal extraction circuitry, demodulation filtering circuitry and signal processing circuitry.
10. A method of locating underground pipes using the system of claim 1, comprising the steps of:
the detector transmits an electromagnetic signal to the underground in real time;
the electronic identifier receives the electromagnetic signal and immediately returns a response signal containing the pipeline characteristic information data;
the detector receives the response signal and analyzes the pipeline characteristic information data from the response signal;
the detector realizes the positioning of the underground pipeline based on the intensity of the response signal and the coordinate data obtained by the built-in GPS module, and identifies the use and the attribute of the pipeline based on the characteristic information data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210784282.3A CN115248454B (en) | 2022-07-05 | 2022-07-05 | Underground pipeline positioning system and method based on electronic identifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210784282.3A CN115248454B (en) | 2022-07-05 | 2022-07-05 | Underground pipeline positioning system and method based on electronic identifier |
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| CN115248454A true CN115248454A (en) | 2022-10-28 |
| CN115248454B CN115248454B (en) | 2024-01-16 |
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