CN115014669A - Automatic response type tunnel water leakage detection method, system and device - Google Patents
Automatic response type tunnel water leakage detection method, system and device Download PDFInfo
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Abstract
The invention provides an automatic response type tunnel water leakage detection method, system and device, belonging to the technical field of tunnel detection, wherein the scheme comprises the steps of collecting a laser beam reflected by a tunnel surface to be detected in real time; acquiring the reflection intensity of the laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, generating a trigger signal; triggering an infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device; and determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
Description
Technical Field
The disclosure belongs to the technical field of tunnel detection, and particularly relates to an automatic response type tunnel water leakage detection method, system and device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The water leakage belongs to common tunnel diseases, and can cause serious threats to the stability of the tunnel, electrical facilities in the tunnel, driving safety and the like. Therefore, the tunnel needs to periodically detect the water leakage.
Thermal infrared imagers are classified into two major types, the refrigeration type and the non-refrigeration type. When the camera is used for refrigeration type shooting, the self-equipped refrigerator works firstly to reduce the temperature of the thermal infrared imager, the detection precision is high, but the price is high, the service life is short, and the camera is generally used in the military field. The non-refrigeration type does not need cooling treatment, can directly work, has the characteristic of small volume, and is widely applied to various fields, including the field of tunnel detection. The infrared focal plane device is a key component of the thermal infrared imager and determines the temperature imaging signal output of the thermal infrared imager. The ambient temperature has a great influence on the infrared focal plane device. Therefore, the thermal infrared imager works under the limitation of environmental temperature, and small-range temperature change can be corrected through a correction algorithm integrated in the thermal infrared imager, so that temperature imaging errors and offset are reduced. Practice shows that the thermal infrared imager has small volume, and the heat generated by various internal devices can cause the body to be scalded when the thermal infrared imager works for a long time. At the moment, the data error of the thermal infrared imager is extremely large, and the thermal infrared imager is easy to crash and even damage internal sensing devices.
For tunnel water leakage detection, due to the defects of manual detection, efficient automatic detection is the future trend. Because the temperature of the tunnel water leakage area is lower than that of the dry tunnel wall, and the thermal infrared imager has good detection sensitivity to the temperature, the thermal infrared imager is widely applied to the tunnel water leakage detection. Patent CN 201810066937.7; CN 201910856676.3; CN201810373105.x and the like disclose a method or an apparatus for automatically identifying leakage water based on infrared thermal imaging acquisition. However, the continuous working thermal infrared imager faces a tunnel with an ultra-long mileage, heat generated in the thermal infrared imager seriously affects temperature acquisition precision, so that data errors are large, imaging distortion is caused, equipment downtime is possibly caused, and even key devices in the thermal infrared imager are damaged; meanwhile, patent cn2016212009551.x discloses an uncooled thermal infrared imager with optimized internal heat distribution structure layout, but the optimal shooting effect cannot be achieved even in the face of continuous operation for several hours.
Disclosure of Invention
The invention provides an automatic response type tunnel water leakage detection method, system and device for solving the problems, wherein the scheme is based on the influence of water on laser absorption, the laser reflection intensity is reduced, and the infrared thermal imager is used for acquiring and triggering by judging the laser reflection intensity; the working time of the thermal infrared imager is shortened, the problem that the internal temperature environment of the thermal infrared imager influences key devices such as an infrared focal plane of the thermal infrared imager, huge data errors are generated, and even equipment breakdown and internal sensors are damaged is solved.
The requirements of high-speed detection, high precision and sustainability can be met simultaneously, and the data storage and processing requirements can be greatly reduced.
According to a first aspect of the embodiments of the present disclosure, there is provided an automatic response type tunnel water leakage detection method, including:
collecting laser beams reflected by a tunnel surface to be detected in real time;
acquiring the reflection intensity of laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, generating a trigger signal;
triggering an infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
Further, the real-time collection of the laser beam reflected by the tunnel surface to be detected specifically includes: based on laser transmitter to the tunnel face of awaiting measuring laser beam of continuous transmission, laser transmitter moves along with the carrier, and laser receiver receives the laser beam that reflects from the tunnel face in real time.
Further, when laser beams reflected by the tunnel surface to be detected are collected in real time, the adopted laser transmitters comprise a first laser transmitter and a second laser transmitter, the laser transmitting distance of the first laser transmitter is larger than that of the second laser transmitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest starting shooting time of the infrared thermal imaging image collecting device under the constant speed of the carrying vehicle.
Further, the obtaining of the reflection intensity of the laser spot in the laser beam, and if the reflection intensity of any laser spot is lower than a preset reference reflection intensity value, generating a trigger signal specifically includes: judging whether the reflection intensity of the laser emitted by the second laser emitter is lower than a preset reference reflection intensity value or not;
if yes, generating a trigger signal, starting an infrared thermal imaging image acquisition device to shoot, and judging whether the reflection intensity of the laser emitted by the first laser emitter is lower than a preset reference reflection intensity value or not, if yes, continuously generating the trigger signal to control the infrared thermal imaging image acquisition device to shoot, and if not, closing the infrared thermal imaging image acquisition device;
if not, continuing to collect the laser reflection signal and judging the intensity of the reflection signal.
According to a second aspect of the embodiments of the present disclosure, there is provided an automatic response type infrared image capturing system for tunnel water leakage, including:
the data acquisition unit is used for acquiring the laser beam reflected by the tunnel surface to be detected in real time;
the image acquisition triggering signal acquisition unit is used for acquiring the reflection intensity of the laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, a triggering signal is generated;
the image acquisition unit is used for triggering the infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and the water leakage detection unit is used for determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
According to a third aspect of the embodiments of the present disclosure, an automatic response type tunnel water leakage detection device is provided, which is applied to a carrying vehicle for detecting tunnel water leakage, and includes a main controller, and a laser transmitter, a laser receiver, and an infrared thermal imaging image acquisition device, which are respectively connected to the main controller; the main controller executes the automatic response type tunnel leakage water detection method.
Further, the laser emitter comprises a first laser emitter and a second laser emitter, the laser emitting distance of the first laser emitter is larger than that of the second laser emitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest shooting time for starting the infrared thermal imaging image acquisition device at the constant speed of the carrying vehicle.
Furthermore, the infrared thermal imaging image acquisition device adopts a thermal infrared imager.
According to a fourth aspect of the embodiments of the present disclosure, there is provided an electronic device, including a memory, a processor and a computer program stored in the memory and running on the memory, where the processor implements the method for detecting tunnel leakage in an automatic response manner when executing the program.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for automatically responsive tunnel leakage water detection.
Compared with the prior art, the beneficial effect of this disclosure is:
(1) the scheme is based on the influence of water on laser absorption, reduces the reflection intensity of laser, and realizes the acquisition and triggering of a thermal infrared imager by judging the reflection intensity of the laser; the working time of the thermal infrared imager is shortened, the problem that the internal temperature environment of the thermal infrared imager influences key devices such as an infrared focal plane of the thermal infrared imager, huge data errors are generated, and even equipment breakdown and internal sensors are damaged is solved.
(2) The scheme indirectly filters redundant infrared thermal imaging data of a tunnel non-leakage water area, greatly reduces the workload of subsequent processing of infrared images, and improves the working efficiency.
Advantages of additional aspects of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to be construed as limiting the disclosure.
Fig. 1 is a flowchart illustrating an automatic response type tunnel water leakage detection method according to an embodiment of the disclosure;
fig. 2 is a detailed flowchart of the infrared thermal imager shooting trigger in the automatic response type tunnel water leakage detection method according to the embodiment of the present disclosure;
fig. 3 is a detailed flowchart of a partial step in the automatic response type tunnel water leakage detection method according to the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an automatic response type tunnel water leakage detection device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a principle of an automatic response type tunnel water leakage detection device according to an embodiment of the present disclosure.
Wherein, 1, a tunnel wall; 2. carrying a vehicle; 3. a first laser transmitter; 4. a second laser transmitter; 5. a laser reflection receiver; 6. a master controller; 7. a thermal infrared imager; 8. a storage device; 9. a laser beam distance; 10. angular width of field of view; 11. a laser beam; 100. a laser module; 200. a signal triggering module; 300. and an infrared data acquisition module.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
The first embodiment is as follows:
the present embodiment aims to provide an automatic response type tunnel water leakage detection method, including:
collecting laser beams reflected by a tunnel surface to be detected in real time;
acquiring the reflection intensity of the laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, generating a trigger signal;
triggering an infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
Further, the real-time collection of the laser beam reflected by the tunnel surface to be detected specifically includes: based on laser emitter to the tunnel face of awaiting measuring laser beam of continuously launching, laser emitter moves along with the carrier, and laser receiver receives the laser beam of following the tunnel face reflection in real time.
Further, when laser beams reflected by the tunnel surface to be detected are collected in real time, the adopted laser transmitters comprise a first laser transmitter and a second laser transmitter, the laser transmitting distance of the first laser transmitter is larger than that of the second laser transmitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest starting shooting time of the infrared thermal imaging image collecting device under the constant speed of the carrying vehicle.
Further, the obtaining of the reflection intensity of the laser spot in the laser beam, and if the reflection intensity of any laser spot is lower than a preset reference reflection intensity value, generating a trigger signal specifically includes: judging whether the reflection intensity of the laser emitted by the second laser emitter is lower than a preset reference reflection intensity value or not;
if yes, generating a trigger signal, starting an infrared thermal imaging image acquisition device to shoot, and judging whether the reflection intensity of the laser emitted by the first laser emitter is lower than a preset reference reflection intensity value or not, if yes, continuously generating the trigger signal to control the infrared thermal imaging image acquisition device to shoot, and if not, closing the infrared thermal imaging image acquisition device;
if not, continuing to collect the laser reflection signal and judging the intensity of the reflection signal.
Specifically, for the convenience of understanding, the embodiments are described in detail below with reference to the accompanying drawings:
fig. 1 is a flowchart illustrating an automatic response type tunnel water leakage detection method according to this embodiment. In this embodiment, the method includes an initial resting step; judging the laser reflection intensity; triggering and collecting by an infrared thermal imager and detecting tunnel leakage water; fig. 2 and 3 show a detailed flow of the automatic response type tunnel water leakage detection method shown in fig. 1.
The method comprises the steps that a laser transmitter and a laser receiver which are arranged on the front portion of a carrying vehicle are adopted to obtain laser reflection signals of a tunnel wall; the laser transmitter comprises a first laser transmitter and a second laser transmitter. And generating a trigger signal based on the reflected signal of the laser spot in the laser beam and the reference reflected intensity value through a comparison result of a main controller (namely a computer or a server); triggering an infrared thermal imager arranged at the rear part of the carrying vehicle by adopting the trigger signal to start shooting, and judging whether to continue triggering the signal by the infrared thermal imager based on the laser reflection intensity of the first laser emitter and the second laser emitter so as to obtain complete infrared image data of water leakage on the tunnel wall. And transmitting the image data of the thermal infrared imager to a storage device in communication connection with the thermal infrared imager.
According to the scheme, the thermal infrared imager is triggered to collect the laser light based on the fact that the laser light is absorbed by water, the laser light reflection intensity is reduced, the laser light reflection intensity is judged and identified, the infrared thermal imager only shoots a tunnel leakage water area, long-time continuous work is not needed, the problem that equipment is damaged due to overhigh internal temperature of the thermal infrared imager is solved, and data errors collected by the thermal infrared imager are reduced. The method has the advantages that redundant data of the non-leakage water area are filtered, and the post-data processing efficiency is improved.
The following describes the steps of the automatic responsive tunnel leakage detection method in detail:
the initial standing step specifically comprises the following steps: and acquiring a laser reflection signal of the dry tunnel wall by adopting a laser transmitter and a laser receiver which are arranged at the front part of the carrying vehicle. The laser transmitter may employ any device known in the art that can transmit laser wavelengths between 700ns and 1400 ns. In the step, the wave band accords with the wavelength of laser safe to human eyes, the transmission distance of the laser is long (up to one hundred meters), and the propagation is stable. And the reference reflection intensity value is used as a trigger basis for starting shooting of a subsequent thermal infrared imager, and is acquired for multiple times on a dry tunnel wall of a tunnel to be detected during initial standing, so that the average laser reflection intensity is calculated. Because the water strongly absorbs the laser in the wave band, the fault-tolerant interval of 10% is set, namely the laser reflection intensity value is higher than the reference reflection intensity value by 90%, the triggering is not carried out, and the generation of false triggering signals can be avoided.
The laser reflection intensity judging step specifically comprises the following steps: a trigger signal is generated based on the laser reflection signal and the reference reflection intensity value by a comparison result of a master controller (computer or server). As shown in fig. 3, on the traveling route of the carrying vehicle, the laser emitter presets the advance of the emitted wave, and reserves the response time for the thermal infrared imager.
The thermal infrared imager triggering and collecting method comprises the following steps: triggering an infrared thermal imager arranged at the rear part of the carrying vehicle by adopting the trigger signal to start shooting, and judging whether to continue shooting the trigger signal by the infrared thermal imager based on the laser reflection intensity of the first laser emitter and the second laser emitter so as to obtain complete infrared image data of water leakage on the tunnel wall. And transmitting the image data of the thermal infrared imager to a storage device in communication connection with the thermal infrared imager.
The tunnel water leakage detection method specifically comprises the following steps: and based on the acquired image, the detection of the tunnel leakage water is realized through a pre-trained image leakage water identification model.
Further, the trigger signal is generated in the laser reflection intensity determination step, and the laser reflection intensity determination step determines whether to continuously generate the trigger signal by considering the laser reflection intensities of the first and second laser emitters. And if the reflection intensity of any laser point in the laser beam of any one of the first laser emitter and the second laser emitter is lower than a reference value of 90%, continuously generating a trigger signal, and preventing the area of a water leakage area from exceeding the field angle of the thermal infrared imager or preventing the interval distance of the water leakage area from being shorter than the traveling distance of the carrying vehicle in the starting reaction time of the thermal infrared imager to cause data acquisition loss of the water leakage area. The present embodiment can avoid leakage of the infrared image data of water from the tunnel wall based on this setting.
Further, in the automatic response type tunnel leakage water infrared image acquisition method, the distance between the two laser transmitters and the distance allowance between the two laser transmitters and the travelling direction of the carrying vehicle are preset based on the travelling speed of the detection system, the reaction time of the laser transmitter receiver and the response time consumed when the thermal infrared imager starts to shoot.
Further, the area of water leakage is determined based on the temperature information carried by the pixel points in the collected image and a preset threshold value, so as to realize the detection of the water leakage of the tunnel, and the method specifically comprises the following steps: based on the temperature information carried by the pixel points in the collected infrared image, the temperature field distribution in the infrared image is screened by setting a water leakage temperature threshold value, a water leakage area is extracted, and the detection of tunnel water leakage is realized.
Example two:
the embodiment aims to provide an automatic response type tunnel water leakage infrared image acquisition system.
An automatic response type infrared image acquisition system for tunnel leakage water comprises:
the data acquisition unit is used for acquiring the laser beam reflected by the tunnel surface to be detected in real time;
the image acquisition triggering signal acquisition unit is used for acquiring the reflection intensity of the laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, a triggering signal is generated;
the image acquisition unit is used for triggering the infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and the water leakage detection unit is used for determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
Further, the system in this embodiment corresponds to the method in the first embodiment, and specific technical details thereof have been described in detail in the first embodiment, so that details are not repeated herein.
Example three:
the purpose of this embodiment is to provide an automatic response formula tunnel percolating water detection device.
An automatic response type tunnel water leakage detection device is applied to a carrying vehicle for detecting tunnel water leakage and comprises a main controller, a laser transmitter, a laser receiver and an infrared thermal imaging image acquisition device, wherein the laser transmitter, the laser receiver and the infrared thermal imaging image acquisition device are respectively connected with the main controller; the main controller executes the automatic response type tunnel water leakage detection method in the first embodiment.
Further, the laser emitter comprises a first laser emitter and a second laser emitter, the laser emitting distance of the first laser emitter is larger than that of the second laser emitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest shooting time for starting the infrared thermal imaging image acquisition device at the constant speed of the carrying vehicle.
Furthermore, the infrared thermal imaging image acquisition device adopts a thermal infrared imager.
Specifically, for the convenience of understanding, the scheme of the present embodiment is described in detail below with reference to the accompanying drawings:
the embodiment provides an automatic response formula tunnel percolating water detection device, the device is applied to the carrier that carries out tunnel percolating water and detects, the device includes:
the laser module is used for receiving and transmitting laser waves by adopting the laser transmitter and the laser receiver so as to obtain a reflected signal of a laser spot in a laser beam on a tunnel wall in real time; the distance difference is the advancing distance of the carrying vehicle within the fastest starting shooting time of the infrared thermal imaging image acquisition device under the constant speed of the carrying vehicle;
the signal triggering module is used for comparing a reflection intensity signal of a laser spot in a laser beam with the reference reflection intensity value by adopting the processor (namely, a computer or a server) based on a built-in automatic response type tunnel water leakage detection method so as to judge whether a triggering thermal infrared imager shooting signal is generated in real time;
and the infrared data acquisition module is used for starting the thermal infrared imager and shooting a water leakage response interval of the tunnel wall based on the infrared shooting trigger signal, and transmitting the image data of the thermal infrared imager to a storage device in communication connection with the thermal infrared imager.
Further, the processor is also used for processing image data of the thermal infrared imager, determining a water leakage area based on temperature information carried by pixel points in the acquired image and a preset threshold value, and realizing detection of tunnel water leakage; specifically, the method comprises the following steps: based on the temperature information carried by the pixel points in the collected infrared image, the temperature field distribution in the infrared image is screened by setting a water leakage temperature threshold value, a water leakage area is extracted, and the detection of tunnel water leakage is realized.
Further, the laser transmitter and the laser receiver which are arranged at the front part of the carrying vehicle are adopted to obtain the laser reflection signal of the tunnel wall. Wherein the laser transmitter comprises a first laser transmitter and a second laser transmitter. And generating a trigger signal based on the reflected signal of the laser spot in the laser beam and a reference reflected intensity value through a comparison result of the main controller (a computer or a server); triggering an infrared thermal imager arranged at the rear part of the carrying vehicle by adopting the trigger signal to start shooting, and judging whether to continue triggering the signal by the infrared thermal imager based on the laser reflection intensity of the first laser emitter and the second laser emitter so as to obtain complete infrared image data of water leakage on the tunnel wall. And transmitting the image data of the thermal infrared imager to a storage device in communication connection with the thermal infrared imager.
The beneficial effects of the above design of this embodiment specifically are: according to the embodiment, the thermal infrared imager is triggered to collect the laser based on the fact that the laser is affected by water in an absorption mode, the laser reflection intensity is reduced, the laser reflection intensity is judged and identified, the infrared thermal imager is only used for shooting a tunnel leakage water area, long-time continuous work is not needed, the problem that equipment is damaged due to overhigh internal temperature of the thermal infrared imager is solved, and data errors collected by the thermal infrared imager are reduced. The embodiment has the advantages that redundant data of the non-leakage water area are filtered out simultaneously, and the post-data processing efficiency is improved.
As shown in fig. 2 and 3, first, in the initial standing step, a laser transmitter and a laser receiver arranged in front of the carrying vehicle are used to obtain a laser reflection signal for drying the tunnel wall. The laser emitter may be any device known in the art that can emit a laser wavelength between 700ns and 1400 ns. In the step, the wave band accords with the wavelength of laser safe to human eyes, the transmission distance of the laser is long (up to hundreds of meters), and the transmission is stable. And the reference reflection intensity value is used as a trigger basis for starting shooting of a subsequent thermal infrared imager, and is acquired for multiple times on the dry tunnel wall of the tunnel to be detected during initial standing, so that the average laser reflection intensity is calculated. Because the water strongly absorbs the laser in the wave band, the fault-tolerant interval of 10% is set, namely the laser reflection intensity value is higher than the reference reflection intensity value by 90%, the triggering is not carried out, and the generation of false triggering signals can be avoided.
In the laser reflection intensity judging step, a trigger signal is generated based on the laser reflection signal and the reference reflection intensity value through a comparison result of a main controller (a computer or a server). As shown in fig. 3, on the traveling route of the carrying vehicle, the laser emitter presets the advance of the emitted wave, and reserves the response time for the thermal infrared imager.
And in the thermal infrared imager triggering and collecting step, triggering the thermal infrared imager arranged at the rear part of the carrying vehicle by adopting the trigger signal to start shooting, and judging whether to continue shooting the trigger signal or not by the thermal infrared imager based on the laser reflection intensity of the first laser emitter and the second laser emitter so as to obtain complete infrared image data of water leakage on the tunnel wall. And transmitting the image data of the thermal infrared imager to a storage device in communication connection with the thermal infrared imager.
In the embodiment, as shown in fig. 4, the thermal infrared imager is arranged at the rear part of the carrying vehicle, and a 10 kilometer-long subway tunnel is very common. The general cross-sectional area of highway tunnel is great, because thermal infrared imager field angle is general less, if once only detect and need integrated many equipment, the cost is higher. If the method is the same as the prior art, the thermal infrared imager is adjusted in arrangement angle to continuously shoot. In a rail transit tunnel, for example, a 10-kilometer subway tunnel, shooting by a single device needs to be performed back and forth three times. The whole section of the complete tunnel can be shot by the highway tunnel with more times. And the resolution ratio of the thermal infrared imager is low, so that the running speed is 5km/h, and the thermal infrared imager needs to continuously work for 6 hours. The cameras also need to work continuously for 2 hours, the internal temperature of the thermal infrared imager can reach more than 40 ℃, and the optimal working temperature interval of the thermal infrared imager is 15-25 ℃. The heat generated inside can seriously affect the data acquisition precision of an infrared focal plane device of the thermal infrared imager and even directly damage the device.
In the embodiment, the thermal infrared imager is started to shoot only when the trigger signal is generated, and the heat generated by the operation of the thermal infrared imager can be compensated by a correction algorithm of the device because the tunnel water leakage area only occupies a small part of the whole area of the tunnel.
Because the thermal infrared imager is arranged at the rear part of the carrying vehicle, the laser emission and the laser reception can be regarded as light velocity propagation in a short distance, and the propagation time can be ignored. The carrying vehicle is started at a constant speed, and the starting reaction time of the thermal infrared imager is constant. Therefore, the infrared thermal imager is started to start shooting when reaching the leaked water area by presetting the laser emission distance.
According to the embodiment, whether suspected defects exist is judged through the geological radar arranged at the front part of the carrying vehicle, whether a rear high-speed linear array camera is triggered to carry out complementary shooting is determined according to the real-time judgment result of the radar, and the defects are inquired and processed in real time through a shot picture, so that the requirements of high-speed testing, high precision, sustainability and anti-interference performance can be met, the measured data can be processed and analyzed in real time, and the data storage and processing requirements are greatly reduced.
Fig. 5 is a schematic block diagram of an automatic response type tunnel leakage water detection device according to the present embodiment. As shown in fig. 5, the automatic response type infrared image acquisition device for tunnel water leakage is applied to a carrying vehicle 2 for detecting tunnel water leakage, and comprises a laser module 100, a signal trigger module 200 and an infrared data acquisition module 300; the laser module 100 comprises a laser transmitter and a laser receiver, wherein the laser transmitter comprises a first laser transmitter 3 and a second laser transmitter 4; the signal triggering module comprises a master controller 6; the infrared data acquisition module comprises a thermal infrared imager 7.
The front part of the carrying vehicle 2 is provided with a first laser emitter 3, a second laser emitter 4 and a laser reflection receiver 5, the middle part is provided with a main controller (computer) 6, and the rear part is provided with a thermal infrared imager 7 and a storage device 8. The laser module 100 is configured to use the first laser emitter 3 and the second laser emitter 4 to emit laser beams 11, and the laser reflection receiver 5 receives reflection signals of each laser spot in the laser beams 11 to obtain a laser reflection intensity signal of the tunnel wall 1 in front of the traveling of the carrying vehicle 2. The signal triggering module 200 is configured to generate a triggering signal based on a comparison result between the laser reflection intensity signal obtained by the laser module 100 and the reference reflection intensity value. Triggering the thermal infrared imager 7 in the infrared data acquisition module 300 to start shooting, and transmitting the shot infrared image data to a storage device 8 in communication connection with the thermal infrared imager. The length of the laser beam 11 is consistent with the size of the angular width 10 of the field of view of the thermal infrared imager 7.
In this embodiment, as shown in fig. 2 and 3, in the step of triggering the thermal infrared imager to collect the laser beam, the first laser reflection intensity signal does not play a triggering role before the second laser reflection intensity is first lower than the reference reflection intensity value by 90% and the triggering signal starts the thermal infrared imager to shoot. The emitting distance of the first laser emitter 3 is far away from the distance of the laser beam emitted by the second laser emitter 4, and the distance 9 is the advancing distance of the carrying vehicle 2 within the fastest starting shooting time of the thermal infrared imager under the constant speed of the carrying vehicle 2, so that the situation that the next water leakage area is too close to the water leakage area at the interval, and the thermal infrared imager is not ready to start shooting is avoided.
In further embodiments, there is also provided:
an electronic device comprising a memory and a processor and computer instructions stored on the memory and executed on the processor, the computer instructions when executed by the processor perform the method of embodiment one. For brevity, no further description is provided herein.
It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory, and may provide instructions and data to the processor, and a portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information.
A computer readable storage medium storing computer instructions which, when executed by a processor, perform the method of embodiment one.
The method in the first embodiment may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
Those of ordinary skill in the art will appreciate that the various illustrative elements, i.e., algorithm steps, described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The method, the system and the device for detecting the tunnel leakage water in the automatic response mode can be realized, and have wide application prospects.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. An automatic response type tunnel water leakage detection method is characterized by comprising the following steps:
collecting laser beams reflected by a tunnel surface to be detected in real time;
acquiring the reflection intensity of laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, generating a trigger signal;
triggering an infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
2. The automatic response type tunnel water leakage detection method according to claim 1, wherein the real-time collection of the laser beam reflected by the tunnel surface to be detected specifically comprises: based on laser emitter to the tunnel face of awaiting measuring laser beam of continuously launching, laser emitter moves along with the carrier, and laser receiver receives the laser beam of following the tunnel face reflection in real time.
3. The automatic response type tunnel water leakage detection method according to claim 1, wherein when laser beams reflected by a tunnel surface to be detected are collected in real time, the adopted laser transmitters comprise a first laser transmitter and a second laser transmitter, the laser transmitting distance of the first laser transmitter is larger than that of the second laser transmitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest starting shooting time of the infrared thermal imaging image collection device under the constant speed of the carrying vehicle.
4. The method according to claim 3, wherein the step of obtaining the reflection intensity of the laser spot in the laser beam generates a trigger signal if the reflection intensity of any laser spot is lower than a preset reference reflection intensity value, and specifically comprises: judging whether the reflection intensity of the laser emitted by the second laser emitter is lower than a preset reference reflection intensity value or not;
if yes, generating a trigger signal, starting an infrared thermal imaging image acquisition device to shoot, and judging whether the reflection intensity of the laser emitted by the first laser emitter is lower than a preset reference reflection intensity value or not, if yes, continuously generating the trigger signal to control the infrared thermal imaging image acquisition device to shoot, and if not, closing the infrared thermal imaging image acquisition device;
if not, continuing to collect the laser reflection signal and judging the intensity of the reflection signal.
5. An automatic response type infrared image acquisition system for tunnel leakage water is characterized by comprising:
the data acquisition unit is used for acquiring the laser beam reflected by the tunnel surface to be detected in real time;
the image acquisition triggering signal acquisition unit is used for acquiring the reflection intensity of the laser points in the laser beam, and if the reflection intensity of any laser point is lower than a preset reference reflection intensity value, a triggering signal is generated;
the image acquisition unit is used for triggering the infrared thermal imaging image acquisition device to acquire images of the tunnel face to be detected in the trigger signal interval; after the trigger signal is finished, closing the infrared thermal imaging image acquisition device;
and the water leakage detection unit is used for determining a water leakage area based on the temperature information carried by the pixel points in the acquired image and a preset threshold value, so as to realize the detection of the tunnel water leakage.
6. An automatic response type tunnel water leakage detection device is characterized in that the device is applied to a carrying vehicle for detecting tunnel water leakage and comprises a main controller, a laser transmitter, a laser receiver and an infrared thermal imaging image acquisition device, wherein the laser transmitter, the laser receiver and the infrared thermal imaging image acquisition device are respectively connected with the main controller; wherein the master controller performs an automatic responsive tunnel water leakage detection method according to any one of claims 1-4.
7. The automatic response type tunnel water leakage detection device of claim 6, wherein the laser emitter comprises a first laser emitter and a second laser emitter, the laser emitting distance of the first laser emitter is larger than that of the second laser emitter, and the distance difference is the traveling distance of the carrying vehicle within the fastest starting shooting time of the infrared thermal imaging image acquisition device at a constant speed of the carrying vehicle.
8. The automatic response type tunnel water leakage detection device according to claim 6, wherein the infrared thermal imaging image acquisition device adopts a thermal infrared imager.
9. An electronic device comprising a memory, a processor and a computer program stored and run on the memory, wherein the processor implements an automatic responsive tunnel water leakage detection method according to any one of claims 1-4 when executing the program.
10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements an automatic responsive tunnel water leakage detection method according to any one of claims 1-4.
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