WO2016045235A1

WO2016045235A1 - Mark belt real-time depth-measuring system based on radar detection technology

Info

Publication number: WO2016045235A1
Application number: PCT/CN2015/000668
Authority: WO
Inventors: 解思亮
Original assignee: 青岛厚科信息工程有限公司
Priority date: 2014-09-28
Filing date: 2015-09-28
Publication date: 2016-03-31
Also published as: CN104236488A

Abstract

A mark belt real-time depth-measuring device based on a radar detection technology comprises a pipeline (3), a mark belt (2) laid above the pipeline (3), and a radar detecting instrument (1). A thin layer of aluminum foil is packaged in the mark belt (2). The radar detecting instrument (1) comprises a radar wave transmitting unit, a radar wave receiving unit, a data recording unit, a data processing unit and a display unit. The depth of the underground mark belt (2) can be measured in real time, and the measurement result can be directly displayed on a display screen of the device. The state of the underground mark belt (2) can be measured in real time.

Description

Real-time sounding system for marking belt based on radar detection technology

Technical field

The invention belongs to the field of radar sounding, and in particular relates to a real-time sounding system for marking belts based on radar detection technology.

Background technique

At present, there are two main management methods for existing underground pipelines: one is the above-ground identification management, that is, the warning is set on the ground; the other is the underground identification management, that is, 30-70 cm above the underground pipeline. The track mark strip is laid. When the excavation is carried out, the fold portion of the logo strip is passively opened with the excavating tool, and is dragged to the ground to give a hint or warning to the diggers. The distance from the sign to the ground is also strictly defined for the depth excavation of the trench when the trench is excavated. The distance from the strip to the pipeline is clearly defined, and the distance from the marker to the ground is also basically clear. However, the service life of underground pipelines will be 30-50 years, and the pipelines with good quality and maintenance will be more than 100 years old. With the passage of time, due to repeated data switching, the lack of data, the loss of the logo caused by repeated excavation, and the natural factors such as the change of the shallow soil layer and the underground sand Partial loss caused by water or gas will cause the failure of existing identification management methods.

The existing identification management method, whether on the ground or underground, failed to solve the real-time identification of the current status of the underground pipeline.

Summary of the invention

In order to solve the above problems, the present invention provides a real-time sounding system for marking belts based on radar detection technology, which can indirectly estimate the change of soil layers around underground pipelines according to the depth and position change of the marking belt, and is a safe inspection and construction of pipelines. Mining provides a reference basis.

The radar detection technology-based identification tape real-time sounding system comprises a pipeline, an identification tape laid on the pipeline, and a radar detector, characterized in that the label is wrapped with a thin layer of aluminum foil, the radar detector The radar wave transmitting unit, the radar wave receiving unit, the data recording unit, the data processing unit and the display unit are included;

a radar wave transmitting unit for transmitting a radar wave;

a radar wave receiving unit for receiving a radar wave reflected from a thin aluminum foil in the identification tape;

The data recording unit for recording the radar unit transmitting radar signal is transmitted and the times t ₁ acceptance receiving unit receiving radar waves reflected radar wave receiving time t _2; and the information is transmitted to the data processing unit;

The data processing unit receives the signal transmitted by the data recording unit, and obtains an average propagation velocity V _{t of the} radar wave in the soil through a preset algorithm program, thereby obtaining a depth h=(t ₂ -t _{1 ) of the} identification band from the ground. ) V _t /2;

The display unit is configured to display in real time the real-time depth h of the identification tape fed back by the data processing module.

In combination with the down-track identification tape, a layer of aluminum foil is encapsulated in the marking tape, and the depth measuring device can realize the real-time measurement of the depth of the traveling mark strip with the aluminum foil. The marking strip is light and flexible, and it is laid 30-70 cm above the pipeline and extends along the pipeline. When the soil around the pipeline is lost due to natural reasons or the pipeline itself leaks, and the structure of the underground soil layer changes, the marking belt above the pipeline will also be It varies with the surrounding soil layer, or drifts or breaks. Use the sounding device to detect the tracking mark. If the position or depth of the tracking mark is suddenly changed, even If the depth data of the marker band cannot be detected, it is likely that the soil structure in the ground has changed drastically or a underground cavity has been formed. At this time, it is necessary to carry out martial law in this area, and immediately carry out excavation and investigation to prevent accidental accidents.

The radar wave transmitting unit emits an electromagnetic wave, and the radar wave receiving unit receives the reflected electromagnetic wave signal. During the detecting process, the data recording unit automatically records the time when the radar emits the detecting signal and receives the electromagnetic wave reflected back by the aluminum foil layer in the marking tape. The time the signal arrived. This radar sounding device has several radar wave velocity calculation programs, such as the dielectric constant method, the reflection coefficient method, and the algorithm program for identifying the distance to the ground; the most suitable radar wave velocity calculation can be selected according to the environment at that time. The way to efficiently calculate the radar wave velocity and provide reliable data for depth calculation. It is possible to detect the change of the soil layer around the pipeline, and infer whether the soil layer around the underground pipeline has undergone a major change according to the change of the position of the marker belt and the depth of the buried pipeline. If the change occurs, the excavation and inspection should be carried out and maintenance should be carried out.

Preferably, the frequency of the radar wave is 25 MHz to 2 GHz.

Preferably, the marking strip encapsulating the thin aluminum foil is an elongated thin strip having a width of 10-20 cm, preferably 15 cm. Radar detection has special requirements for detecting objects. The size of the object to be detected is at least 1/10 of the buried depth. The thin-layer aluminum foil with this width can meet the radar detection requirements and improve the accuracy of real-time measurement.

Compared with the prior art, the invention has the beneficial effects that the device can realize real-time depth measurement of the underground identification tape and can be directly displayed on the display screen of the device; only a thin layer of aluminum foil is used to present the underground The marking belt has become an underground environmental barometer. The sounding device is combined with the aluminum foil marking tape to realize the real-time measurement of the underground marking belt. The investment cost is low, the cost is low, and the economy is applicable. The operation method is simple, and the operator holds the sounding device. By patrolling along the marking belt, you can check the depth of the marking belt at any time to judge the condition of the surrounding environment of the underground marking belt, saving manpower and material resources.

DRAWINGS

Figure 1 is a schematic diagram of the measurement of the present invention;

Figure 2 is an enlarged view of the identification tape of the present invention;

Figure 3 is a schematic diagram of the identification band drift;

Figure 4 is a schematic view of the identification tape break;

Among them, 1-radar detector; 2-marker belt; 3-pipeline.

detailed description

The invention will be further explained below in conjunction with the drawings and embodiments.

Example 1

A real-time sounding system for markings based on radar detection technology, comprising a pipeline 3, an identification strip 2 laid above the pipeline 3, and a radar detector 1 in which a thin layer of aluminum foil is packaged, and the width of the thin aluminum foil is 15cm, the marking strip 2 is laid 30~70cm above the underground pipeline 3, as shown in Fig. 2, the information is known at the beginning of the pipeline laying, and the distance h detected by the radar detector to the ground is known. Mark the depth of the belt.

The detection method of h is as follows:

The radar detector 1 includes a radar wave transmitting unit, a radar wave receiving unit, a data recording unit, a data processing unit, and a display unit; the radar wave has a frequency of 25 MHz to 2 GHz; a radar wave transmitting unit is configured to transmit a radar wave; and the radar wave a receiving unit, configured to receive a radar wave reflected back after reaching the strip with a thin layer of aluminum foil; the data recording unit is configured to record a time t _{1 of the} radar wave transmitting unit transmitting the radar signal and the radar wave receiving unit receives the reflected back The time t ₂ of the radar wave signal; the well transmits the information to the data processing unit; the data processing unit receives the signal transmitted by the data recording unit, and selects different radar wave velocity calculation methods according to the soil layer structure of the measurement site. The average propagation velocity V _{t of the} radar wave in the soil is obtained by the algorithm module, and then the depth h=(t ₂ -t ₁ )V _t /2 of the identification band from the ground is obtained, and then the data h is transmitted to the display unit to work. Personnel can read h through a radar detector.

As shown in Figures 3 and 4, if the marker tape 2 drifts or breaks, the detected data on the radar detector will show an abnormality. If the position of the marker tape is detected or the depth of the marker is greatly changed or cannot be detected. To the data, it is very likely that the structure of the underground soil layer has changed, resulting in drift or breakage of the marker belt. Even a void has formed around the underground pipeline, which is likely to cause collapse of the ground. At this time, it is necessary to immediately excavate and inspect.

Example 2

This embodiment is the same as Embodiment 1 except for the following features;

The thin aluminum foil has a width of 10 cm.

Example 3

This embodiment is the same as Embodiment 1 except for the following features:

The thickness of the thin aluminum foil is 20 cm.

Claims

A real-time sounding system for marking belts based on radar detection technology, comprising a pipeline, an identification strip laid above the pipeline, and a radar detector, characterized in that the label is wrapped with a thin layer of aluminum foil, the radar detector comprising a radar wave a transmitting unit, a radar wave receiving unit, a data recording unit, a data processing unit, and a display unit;

a radar wave transmitting unit for transmitting a radar wave;

The wave receiving unit is configured to receive a radar wave reflected from the thin aluminum foil in the identification tape;

The data recording unit for recording the radar unit transmitting radar signal is transmitted and the times t 1 radar receiving unit receives the reflected radar time t 2; and the information is transmitted to the data processing unit;

The data processing unit receives the signal transmitted by the data recording unit, and obtains an average propagation velocity V t of the radar wave in the soil through a preset algorithm program, thereby obtaining a depth h=(t 2 -t 1 ) of the identification band from the ground. ) V t /2;

The display unit is configured to display in real time the real-time depth h of the identification tape fed back by the data processing module.
The identification tape real-time sounding system based on radar detection technology according to claim 1, wherein the identification tape is located 30 to 70 cm above the pipeline.
The identification tape real-time sounding system based on radar detection technology according to claim 1, wherein the radar wave has a frequency of 25 MHz to 2 GHz.
The identification tape real-time sounding system based on radar detection technology according to claim 1, wherein the thin aluminum foil is encapsulated in an elongated ribbon in the identification tape.
The identification tape real-time sounding system based on radar detection technology according to claim 4, wherein the thin aluminum foil has a width of 10 to 20 cm.
The identification tape real-time sounding system based on radar detection technology according to claim 5, wherein the thin aluminum foil has a width of 15 cm.