CN114280413A - Method and device for positioning abnormal fault sound of power transmission channel - Google Patents
Method and device for positioning abnormal fault sound of power transmission channel Download PDFInfo
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Abstract
The embodiment of the application discloses a method and equipment for positioning abnormal fault sounds of a power transmission channel. Receiving alarm records respectively sent by a plurality of audio-visual equipment arranged on different high-voltage towers; acquiring audio information recorded in an alarm record; selecting any alarm record as a reference alarm record, and determining the relative time difference between other alarm records and the reference alarm record; establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point; acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain coordinates of the other audio-visual equipment in a rectangular coordinate system through the unified GPS information; and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the coordinate positions corresponding to the reference points, the coordinate positions corresponding to other audio-visual equipment and the relative time difference. By the method, hidden danger positioning can be performed in a short time.
Description
Technical Field
The application relates to the technical field of electric power, in particular to a method and equipment for positioning abnormal fault sound of a power transmission channel.
Background
The transmission line is an important component of the power grid and is affected by artificial and natural conditions, and various potential safety hazards often appear in the transmission line. Such as mechanical construction, various birds of prey, etc. The transmission line monitoring device becomes a main monitoring mode. However, the current monitoring device shoots at fixed intervals, such as 30 minutes and 60 minutes, due to various factors such as the electric quantity of the monitoring device, the network and the platform processing capacity, and a monitoring time blind area exists, so that the requirement for monitoring the fault of the power transmission line is difficult to meet.
Therefore, in the prior art, a lightning positioning system is usually adopted to perform sound real-time monitoring on the transmission line environment, and the position determination is performed by integrating the fault trace of the fault pole tower on site and whether lightning falls around the pole tower in the lightning positioning system through fault pole tower positioning and fault time given by the substation traveling wave distance measuring device.
However, the lightning positioning system needs more data when positioning the hidden danger, and is difficult to position the hidden danger in a short time under the condition of emergency fault.
Disclosure of Invention
The embodiment of the application provides a method and equipment for positioning abnormal fault sounds of a power transmission channel, which are used for solving the following technical problems: the prior art is difficult to carry out hidden danger positioning on various abnormal fault sounds possibly existing in a power transmission channel.
The embodiment of the application adopts the following technical scheme:
the embodiment of the application provides a method for positioning abnormal fault sound of a power transmission channel. The method comprises the steps of receiving alarm records respectively sent by a plurality of audio-visual devices installed on different high-voltage towers; acquiring audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record; selecting any alarm record as a reference alarm record, and determining the relative time difference between other alarm records and the reference alarm record; wherein, the relative time difference is the time difference of audio information recorded by different audio-visual equipment; establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point; acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain coordinates of the other audio-visual equipment in a rectangular coordinate system through the unified GPS information; and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between other alarm records and the reference alarm record respectively.
According to the method and the device, the audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record is obtained, so that the starting time of each audio-visual device for starting to record the abnormal sound can be obtained, and the relative time difference recorded between different audio-visual devices can be determined. Therefore, the sound source coordinates of the abnormal fault sound of the power transmission channel can be obtained according to the relative time difference and the coordinate points of the audio-visual equipment. The embodiment of the application gets rid of a single power transmission line monitoring mode of timing photographing. Moreover, the sound of different types can be positioned, the problem that a thunder and lightning positioning system cannot position hidden dangers of other types of sound such as mechanical construction is solved, the monitoring effect of a power transmission channel is obviously enhanced, meanwhile, GPS numerical values are unified, the calculation process is simplified, and the hidden danger positions can be positioned in a short time under the condition of emergency faults.
In an implementation manner of the present application, acquiring GPS information of other audiovisual devices, and performing numerical unification on the GPS information specifically includes: acquiring GPS information corresponding to other audio-visual equipment; the GPS information comprises latitude, longitude, altitude and curvature radius which are respectively corresponding to other audio-visual equipment; and respectively carrying out numerical unification on the altitude and the curvature radius.
According to the embodiment of the application, the GPS position information corresponding to the audio-visual equipment is converted into the coordinate values corresponding to the rectangular coordinate system. The calculation difficulty of calculating the sound source position can be reduced, and the error rate of calculation is reduced, so that the calculated sound source position is more accurate. Secondly, because the range unit generally installs in plain area, and each audio-visual equipment installation distance is nearer, consequently can carry out data unification with altitude and curvature radius to further reduce the calculation degree of difficulty, promote the efficiency of sound location.
In an implementation manner of the present application, obtaining, through unified GPS information, a coordinate position corresponding to another audio-visual device in a rectangular coordinate system specifically includes: based on the formula
xi＝(N+alt)×(lati/π-latk/π)；
yi＝(N+alt)×(cos(lati)loni/π-cos(latk)lonk/π)；
zi＝alt；
Determining coordinate values corresponding to other audio-visual equipment in a rectangular coordinate system; wherein x isiCoordinate values of the ith audio-visual device in the x direction corresponding to the rectangular coordinate system; y isiCoordinate values of y direction corresponding to the ith audio-visual equipment in a rectangular coordinate system; z is a radical ofiCoordinate values of z direction corresponding to the ith audio-visual equipment in a rectangular coordinate system; n is the unified curvature radius; alt is the altitude after unification; latiLatitude of the ith audiovisual equipment; latkAs the latitude of the reference point; loniLongitude of the ith audiovisual device; lonkThe longitude of the reference point.
In one implementation manner of the present application, after obtaining sound source coordinates of a power transmission channel abnormal fault sound, the method further includes: and according to the longitude and latitude of the reference point, the unified curvature radius and the unified altitude, carrying out inverse transformation on the coordinate position of the sound source in the rectangular coordinate system to obtain the GPS position information corresponding to the sound source.
In an implementation manner of the present application, performing inverse transformation on a coordinate position of a sound source in an orthogonal coordinate system to obtain GPS position information corresponding to the sound source specifically includes: based on the formula
lat＝latk+yπ/(N+alt)；
lon＝(x/(N+alt)+cos(latk)lonk/π)×π/cos(lat)；
alt＝z；
Carrying out inverse operation on the sound source coordinates of the abnormal fault sound of the power transmission channel to obtain GPS position information corresponding to the sound source; wherein, lat is the longitude of the sound source; lon is the latitude of the sound source; alt is the altitude of the sound source; latkAs the latitude of the reference point; y is a coordinate value of the sound source in the y direction in the rectangular coordinate system; n is the unified curvature radius; x is a coordinate value of the sound source in the x direction in the rectangular coordinate system; lonkIs the longitude of the reference point; z is a coordinate value of the sound source in the z direction in the rectangular coordinate system.
In an implementation manner of the present application, obtaining sound source coordinates of abnormal fault sounds in a power transmission channel based on a coordinate position corresponding to a reference point in the rectangular coordinate system, a coordinate position corresponding to other audiovisual equipment in the rectangular coordinate system, and a relative time difference between each of other alarm records and a reference alarm record, specifically includes: obtaining a first distance formula between a sound source and a reference point according to a corresponding coordinate position of the reference point in the rectangular coordinate system and a preset sound source coordinate; the preset sound source coordinates comprise coordinate parameters to be solved; obtaining a second distance formula between the sound source and other audio-visual equipment according to the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the preset sound source coordinate; performing matrix transformation based on the first distance formula and the second distance formula; and calculating the transformed matrix by a least square method to obtain a coordinate parameter to be solved in the preset sound source coordinate.
In one implementation of the present application, after receiving the warning records respectively sent by the plurality of audiovisual devices installed on different high-voltage towers, the method further includes: classifying the audio-visual equipment according to the position coordinates of the audio-visual equipment so as to divide the audio-visual equipment with the distance difference smaller than a preset distance difference into the same category; analyzing the alarm records corresponding to the audio-visual equipment of the same category, and determining abnormal data that the recorded starting time of the abnormal fault sound of the power transmission channel does not belong to a preset time range; and eliminating the alarm records corresponding to the abnormal data.
According to the method and the device, the audiovisual equipment in the adjacent range is classified into the same category by classifying the audiovisual equipment. Since the time when the abnormal sound is received by the audiovisual devices in the vicinity is similar, the start time when the abnormal sound is recorded is also similar. The abnormal recording time can be eliminated through comparison, so that the data participating in positioning calculation is more accurate and reliable.
In an implementation manner of the present application, before obtaining audio information of abnormal fault sound of a power transmission channel recorded in an alarm record, the method further includes: classifying the collected audio information of the power transmission channel through a preset sound classification model in the audio-visual equipment, and uploading the audio information and the sound category corresponding to the audio information to a monitoring platform; and under the condition that the audio information belongs to the category of the abnormal fault sound of the power transmission channel, performing positioning analysis on the abnormal fault sound of the power transmission channel.
In one implementation manner of the present application, determining the relative time difference between each of the other alarm records and the reference alarm record specifically includes: determining first starting time of abnormal fault sound of a power transmission channel corresponding to the reference alarm record; determining second starting time of abnormal fault sound of the power transmission channel corresponding to other alarm records; and determining a time difference value between the first starting time and the second starting time, and taking the time difference value as a relative time difference so as to calculate the sound source coordinates through the relative time difference.
The embodiment of the application provides a positioning device for abnormal fault sound of a power transmission channel, which comprises: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to: receiving alarm records respectively sent by a plurality of audio-visual equipment arranged on different high-voltage towers; acquiring audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record; selecting any alarm record as a reference alarm record, and determining the relative time difference between other alarm records and the reference alarm record; wherein, the relative time difference is the time difference of audio information recorded by different audio-visual equipment; establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point; acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain coordinates of the other audio-visual equipment in a rectangular coordinate system through the unified GPS information; and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between other alarm records and the reference alarm record respectively.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: according to the method and the device, the audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record is obtained, so that the starting time of each audio-visual device for starting to record the abnormal sound can be obtained, and the relative time difference recorded between different audio-visual devices can be determined. Therefore, the sound source coordinates of the abnormal fault sound of the power transmission channel can be obtained according to the relative time difference and the coordinate points of the audio-visual equipment. The embodiment of the application gets rid of a single power transmission line monitoring mode of timing photographing. Moreover, the sound of different types can be positioned, the problem that a thunder and lightning positioning system cannot position hidden dangers of other types of sound such as mechanical construction is solved, the monitoring effect of a power transmission channel is obviously enhanced, meanwhile, GPS numerical values are unified, the calculation process is simplified, and the hidden danger positions can be positioned in a short time under the condition of emergency faults.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort. In the drawings:
fig. 1 is a flowchart of a method for locating abnormal fault sounds in a power transmission channel according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a method for locating abnormal fault sounds in a power transmission channel according to an embodiment of the present disclosure;
fig. 3 is a diagram illustrating a first example of sound localization of an abnormal fault in a power transmission channel according to an embodiment of the present application;
fig. 4 is a second exemplary diagram of sound localization of an abnormal fault of a power transmission channel according to an embodiment of the present application;
fig. 5 is a third exemplary diagram of sound localization of an abnormal fault of a power transmission channel according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a device for locating abnormal fault sounds in a power transmission channel according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a method and equipment for positioning abnormal fault sound of a power transmission channel.
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments of the present disclosure, shall fall within the scope of protection of the present application.
The transmission line is an important component of the power grid and is affected by artificial and natural conditions, and various potential safety hazards often appear in the transmission line. Such as mechanical construction, various birds of prey, etc. The transmission line monitoring device becomes a main monitoring mode. However, the current monitoring device shoots at fixed intervals, such as 30 minutes and 60 minutes, due to various factors such as the electric quantity of the monitoring device, the network and the platform processing capacity, and a monitoring time blind area exists, so that the requirement for monitoring the fault of the power transmission line is difficult to meet.
Therefore, in the prior art, a lightning positioning system is usually adopted to perform sound real-time monitoring on the transmission line environment, and the position determination is performed by integrating the fault trace of the fault pole tower on site and whether lightning falls around the pole tower in the lightning positioning system through fault pole tower positioning and fault time given by the substation traveling wave distance measuring device.
However, the lightning positioning system needs more data when positioning the hidden danger, and is difficult to position the hidden danger in a short time under the condition of emergency fault.
In order to solve the above problem, embodiments of the present application provide a method and an apparatus for locating abnormal fault sound of a power transmission channel. By acquiring the audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record, the starting time of each audio-visual device for starting to record the abnormal sound can be obtained, so that the relative time difference recorded between different audio-visual devices can be determined. Therefore, the sound source coordinates of the abnormal fault sound of the power transmission channel can be obtained according to the relative time difference and the coordinate points of the audio-visual equipment. The embodiment of the application gets rid of a single power transmission line monitoring mode of timing photographing. Moreover, the sound of different types can be positioned, the problem that a thunder and lightning positioning system cannot position hidden dangers of other types of sound such as mechanical construction is solved, the monitoring effect of a power transmission channel is obviously enhanced, meanwhile, GPS numerical values are unified, the calculation process is simplified, and the hidden danger positions can be positioned in a short time under the condition of emergency faults.
The technical solutions proposed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for locating abnormal fault sounds in a power transmission channel according to an embodiment of the present application. As shown in fig. 1, the method for locating abnormal fault sounds in a power transmission channel includes the following steps:
s101, the monitoring platform receives alarm records sent by a plurality of audio-visual devices installed on different high-voltage towers respectively.
In an embodiment of the application, collected audio information of a power transmission channel is classified through a preset sound classification model in audio-visual equipment, and the audio information and a sound category corresponding to the audio information are uploaded to a monitoring platform. And under the condition that the audio information belongs to the category of abnormal fault sounds of the power transmission channel, the monitoring platform carries out positioning analysis on the abnormal fault sounds of the power transmission channel.
Specifically, the audio-visual equipment installed on different high-voltage towers collects environmental sounds of the power transmission line channel in real time, and classifies the environmental sounds by using a classification neural network to classify target sounds such as mechanical construction, thunder and the like. And transmitting the information to a monitoring platform through an http protocol, wherein the transmitted field comprises a sound alarm type, sound acquisition time, GPS information of the equipment and a sound file, and the GPS information of the equipment comprises longitude, latitude and altitude.
Further, the monitoring platform receives alarm records sent by different audio-visual devices, determines whether current sound influences the power transmission line according to the alarm types in the records, and then carries out positioning analysis on the sound positions with the influences.
S102, the monitoring platform obtains audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record.
In an embodiment of the application, the monitoring platform acquires audio information in the alarm record, and determines the starting time of recording the abnormal sound according to a sound waveform corresponding to the audio information.
For example, the current audio information has a total duration of 10s, and the sound waveform appears from the 3 rd s, so that the audio visual device receives the abnormal sound from the 3 rd s and starts recording the abnormal sound.
In an embodiment of the application, the monitoring platform classifies the audiovisual equipment according to the position coordinates of the audiovisual equipment, so as to classify the audiovisual equipment with the distance difference smaller than the preset distance difference into the same category. And the monitoring platform analyzes the alarm records corresponding to the audio-visual equipment of the same category and determines abnormal data that the recorded starting time of the abnormal fault sound of the power transmission channel does not belong to a preset time range. And eliminating the alarm records corresponding to the abnormal data.
Specifically, the monitoring platform classifies the audiovisual equipment according to the GPS location information corresponding to each audiovisual equipment. Closely located audiovisual devices are classified into the same category. Because the time when the nearby audiovisual equipment receives the abnormal sound is approximate, the audiovisual equipment in the same category can compare the starting time when monitoring the abnormal sound. The equipment with larger time difference with the audio-visual equipment record of the category is determined, and the alarm record corresponding to the equipment is deleted, so that the error of the data participating in the coordinate positioning calculation is reduced, and the accuracy of the data is ensured.
For example, it is assumed that the times at which recording of sounds corresponding to a plurality of audiovisual devices located in close proximity starts are respectively 3s, 4s, 3.5s, 3s, and 6 s. At this time, it can be seen that the difference between the recording time of the 6 th time and other recording times is large, and therefore, the data is abnormal data, and the alarm record corresponding to the data needs to be deleted.
According to the method and the device, the audiovisual equipment in the adjacent range is classified into the same category by classifying the audiovisual equipment. Since the time when the abnormal sound is received by the audiovisual devices in the vicinity is similar, the start time when the abnormal sound is recorded is also similar. The abnormal recording time can be eliminated through comparison, so that the data participating in positioning calculation is more accurate and reliable.
S103, the monitoring platform selects any one of the alarm records as a reference alarm record, and determines relative time differences between other alarm records and the reference alarm record respectively.
In one embodiment of the present application, a first start time of a power transmission channel abnormal fault sound corresponding to a reference alarm record is determined. And determining second starting time of abnormal fault sound of the power transmission channel corresponding to other alarm records. Determining a time difference value between the first start time and the second start time, and taking the time difference value as a relative time difference.
Specifically, in the alarm record set from which the abnormal data is removed, any one of the alarm records is selected as a reference alarm record, and the relative time difference between the other alarm records and the reference alarm record is calculated. Wherein the relative time difference is a time difference between the different audio-visual devices recording the audio information.
Further, the time when the abnormal sound is received corresponding to the reference alarm record is determined, the time when the abnormal sound is received by other audio-visual equipment is determined, and the time difference between the abnormal sound and the time is calculated, wherein the time difference is the relative time difference between the other alarm records and the reference alarm record. For example, assuming that the time of receiving the abnormal sound corresponding to the reference alarm record is the 4 th s, and the time of receiving the abnormal sound corresponding to the other reference alarm records is the 5 th s, the relative time difference between the two is 1 s.
Further according to the formula
r1(t)＝s(t)+n1(t)；
r2(t)＝s(t-D)+n2(t)；
R1,2(τ)＝E{r1(t)×r2(t+τ)}；
D＝argmaxR1,2(τ)
And calculating the time delay by cross-correlation, namely calculating the relative time difference. Wherein D is a relative time difference, R1,2(τ) is a representation of the cross-correlation between two audio-visual devices; n is1(t) noise picked up by the first audio-visual equipment, n2(t) noise collected by the second audio-visual device. s (t) is a target sound signal, r1(t) when the first audio-visual device receives sound at time D, r2(t) the second audio-visual device receives the sound after the relative time difference has elapsed.
And S104, the monitoring platform establishes a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point.
In one embodiment of the present application, a spatial cartesian coordinate system is established with the reference point as the origin. And acquiring GPS information corresponding to other audio-visual equipment. The GPS information includes latitude, longitude, altitude and curvature radius corresponding to other audio-visual devices. And respectively carrying out numerical unification on the altitude and the curvature radius. And determining coordinate values corresponding to other audio-visual equipment in the rectangular coordinate system based on the GPS information after numerical values are unified.
Specifically, in the sound collection environment with the power transmission channel hidden trouble according to the embodiment of the present application, the mounting positions of the audio-visual devices are separated by a short distance (less than 5km), and the mounting heights are similar, so that the mounting positions of the audio-visual devices can be regarded as being on one plane. And taking the audio-visual equipment corresponding to the reference alarm record as a reference point, taking the north direction as a y axis and the east direction as an x axis, and taking the vertical ground as a z axis to establish a space Cartesian coordinate system.
According to the embodiment of the application, the GPS position information corresponding to the audio-visual equipment is converted into the coordinate values corresponding to the rectangular coordinate system. The calculation difficulty of calculating the sound source position can be reduced, and the error rate of calculation is reduced, so that the calculated sound source position is more accurate. Secondly, because the range unit generally installs in plain area, and each audio-visual equipment installation distance is nearer, consequently can carry out data unification with altitude and curvature radius to further reduce the calculation degree of difficulty, promote the efficiency of sound location.
S105, the monitoring platform acquires GPS information of other audio-visual equipment, numerical unification is carried out on the GPS information, and coordinates of the other audio-visual equipment in the rectangular coordinate system are obtained through the unified GPS information.
In an embodiment of the present application, if the coordinates of the kth audiovisual device are taken as the reference origin, the distance formula between the other audiovisual devices and the reference origin is:
the X direction is as follows:
xi＝(Ni+alti)×lati/π-(Nk+altk)×latk/π；
the Y direction is as follows:
yi＝(Ni+alti)×cos(lati)loni/π-(Nk+Hk)cos(latk)lonk/π)；
the Z direction is as follows:
zi＝lati-latk
in one embodiment of the present application, the apparatus for measuring distance is located in plain areas, and the distance between the audio-visual devices is within 5km, so that the curvature radius values of the installation points of the audio-visual devices can be regarded as the same, and the installation heights can be regarded as equal.
In particular, based on a formula
xi＝(N+alt)×(lati/π-latk/π)；
yi＝(N+alt)×(cos(lati)loni/π-cos(latk)lonk/π)；
zi＝alt；
Wherein the content of the first and second substances,
and converting the GPS information corresponding to other audio-visual equipment into coordinate values corresponding to the rectangular coordinate system. Wherein x isiCoordinate values of the ith audio-visual device in the x direction corresponding to the rectangular coordinate system; y isiCoordinate values of y direction corresponding to the ith audio-visual equipment in a rectangular coordinate system; z is a radical ofiCoordinate values of z direction corresponding to the ith audio-visual equipment in a rectangular coordinate system; n is the unified curvature radius; alt is the altitude after unification; latiLatitude of the ith audiovisual equipment; latkAs the latitude of the reference point; loniLongitude of the ith audiovisual device; lonkThe longitude of the reference point.
And S106, the monitoring platform obtains the sound source coordinates of the abnormal fault sound of the power transmission channel based on the coordinate positions of the reference points in the rectangular coordinate system, the coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between other alarm records and the reference alarm record.
In an embodiment of the present application, a first distance formula between a sound source and a reference point is obtained according to a coordinate position corresponding to the reference point and a preset sound source coordinate. The preset sound source coordinates comprise coordinate parameters to be solved. And obtaining a second distance formula between the sound source and other audio-visual equipment according to the coordinate positions corresponding to other audio-visual equipment and the preset sound source coordinates. And performing matrix transformation based on the first distance formula and the second distance formula. And calculating the transformed matrix by a least square method to obtain a coordinate parameter to be solved in the preset sound source coordinate.
Specifically, the audio-visual device corresponding to the reference alarm record is taken as a reference point, and the time when the device acquires the target sound is taken as zero time. The time when the preset sound source generates sound is t, and the coordinates are (x, y, z). The time when the other audio-visual acquisition equipment i receives the sound is ti, the coordinate position is (xi, yi, zi), and k is the sound speed (340 m/s).
The first distance formula from the sound source to the reference point can be obtained as follows:
x2+y2+z2＝k2t2
the second distance formula from the sound source to the other audio-visual device i is:
(x-xi)2+(y-yi)2+(z-zi)2＝k2(t-ti)2
the first distance formula and the second distance formula are simplified to obtain
xi*x+yi*y+zi*z-k2*ti*t＝(xi 2+yi 2+zi 2-k2*ti 2)/2
Namely:
the matrix form is:
order to
Is AX ═ B
Solving by using a least square method of a linear equation system to obtain:
X＝(ATA)-1ATB
the sound source coordinates (x, y, z) can be obtained. And based on the obtained sound source coordinates, the time at which the sound source generates sound is obtained as t.
In an embodiment of the present application, the coordinate position of the sound source in the rectangular coordinate system is inversely transformed according to the longitude and latitude of the reference point, the unified curvature radius, and the unified altitude, so as to obtain the GPS position information corresponding to the sound source.
In particular, based on a formula
lat＝latk+yπ/(N+alt)；
lon＝(x/(N+alt)+cos(latk)lonk/π)×π/cos(lat)；
alt＝z；
And performing inverse operation on the sound source coordinates of the abnormal fault sound of the power transmission channel to obtain the GPS position information corresponding to the sound source.
Wherein, lat is the longitude of the sound source; lon is the latitude of the sound source; alt is the altitude of the sound source; latkAs the latitude of the reference point; y is a coordinate value of the sound source in the y direction in the rectangular coordinate system; n is the unified curvature radius; x is a coordinate value of the sound source in the x direction in the rectangular coordinate system; the lonk is the longitude of the reference point; z is a coordinate value of the sound source in the z direction in the rectangular coordinate system.
The embodiment of the application gets rid of a single power transmission line monitoring mode of timing photographing. In addition, the sound of different types can be positioned, the problem that a lightning positioning system cannot position hidden dangers of other types of sound such as mechanical construction is solved, and the monitoring effect of a power transmission channel is obviously enhanced.
Fig. 2 is a flow chart of a method for positioning abnormal fault sounds of a power transmission channel according to an embodiment of the present application. As shown in fig. 2, the flow of the method for locating abnormal fault sound of power transmission channel is as follows:
in one embodiment of the application, the audio-visual device collects sounds of the power transmission line, and inputs the collected sounds into a preset neural network model so as to classify the collected sounds.
In one embodiment of the application, the audio-visual device uploads the collected audio information and the sound category corresponding to the audio to the monitoring platform. And the monitoring platform screens the received alarm records and deletes the abnormal data.
In one embodiment of the application, the monitoring platform selects an alarm record as a reference alarm record, and uses the audio-visual device corresponding to the reference alarm record as a reference point. And establishing a rectangular coordinate system by taking the reference point as an origin, thereby converting the GPS position of the audio-visual equipment into a coordinate system coordinate position.
In one embodiment of the present application, the monitoring platform calculates the relative time difference between the other alarm records and the reference alarm record, and locates the hidden danger sound according to the relative time difference and the established rectangular coordinate system.
Fig. 3 is a diagram illustrating a first example of sound localization of an abnormal fault in a power transmission channel according to an embodiment of the present application. Fig. 4 is a diagram illustrating a second example of sound localization of an abnormal fault in a power transmission channel according to an embodiment of the present application. Fig. 5 is a third exemplary diagram of sound localization of an abnormal fault of a power transmission channel according to an embodiment of the present application. As shown in fig. 3, 4, and 5, the central coordinate point is the calculated sound source position, and the points a1, a2, and A3 in the circle are the actual sound source points, respectively. As shown in fig. 3, fig. 4, and fig. 5, it can be seen that the positioning method in the embodiment of the present application has a small error, and meets the current actual requirement.
Fig. 6 is a schematic structural diagram of a device for locating abnormal fault sounds in a power transmission channel according to an embodiment of the present application. As shown in fig. 6, the apparatus for locating a power transmission path abnormal fault sound includes:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to:
receiving alarm records respectively sent by a plurality of audio-visual equipment arranged on different high-voltage towers;
acquiring audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record;
selecting any one of the alarm records as a reference alarm record, and determining relative time differences between other alarm records and the reference alarm record respectively; wherein the relative time difference is a time difference of recording the audio information by different audio-visual equipment;
establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point;
acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain coordinates of the other audio-visual equipment in the rectangular coordinate system through the unified GPS information;
and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between the other alarm records and the reference alarm record respectively.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments of the apparatus, the device, and the nonvolatile computer storage medium, since they are substantially similar to the embodiments of the method, the description is simple, and for the relevant points, reference may be made to the partial description of the embodiments of the method.
The foregoing description of specific embodiments of the present application has been presented. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the embodiments of the present application pertain. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for locating abnormal fault sounds of a power transmission channel, the method comprising:
receiving alarm records respectively sent by a plurality of audio-visual equipment arranged on different high-voltage towers;
acquiring audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record;
selecting any one of the alarm records as a reference alarm record, and determining relative time differences between other alarm records and the reference alarm record respectively; wherein the relative time difference is a time difference of recording the audio information by different audio-visual equipment;
establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point;
acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain corresponding coordinate positions of the other audio-visual equipment in the rectangular coordinate system through the unified GPS information;
and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between the other alarm records and the reference alarm record respectively.
2. The method according to claim 1, wherein the acquiring GPS information of other audiovisual devices and performing numerical unification on the GPS information specifically includes:
acquiring GPS information corresponding to the other audio-visual equipment; the GPS information comprises latitude, longitude, altitude and curvature radius corresponding to the other audio-visual equipment respectively;
and respectively carrying out numerical unification on the altitude and the curvature radius.
3. The method according to claim 1, wherein obtaining the coordinate positions of the other audiovisual devices in the rectangular coordinate system through the unified GPS information specifically includes:
based on the formula
xi＝(N+alt)×(lati/π-latk/π)；
yi＝(N+alt)×(cos(lati)loni/π-cos(latk)lonk/π)；
zi＝alt；
Determining coordinate values corresponding to the other audio-visual equipment in the rectangular coordinate system; wherein x isiCoordinate values of the ith audio-visual device in the x direction corresponding to the rectangular coordinate system; y isiCoordinate values of the ith audio-visual device in the y direction corresponding to the rectangular coordinate system; z is a radical ofiFor the ith audio-visual equipment at said right angleCoordinate values in the z direction corresponding to the coordinate system; n is the unified curvature radius; alt is the altitude after unification; latiLatitude of the ith audiovisual equipment; latkAs the latitude of the reference point; loniLongitude of the ith audiovisual device; lonkThe longitude of the reference point.
4. The method according to claim 2, wherein after obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel, the method further comprises:
and according to the longitude and latitude of the reference point, the unified curvature radius and the unified altitude, carrying out inverse transformation on the coordinate position of the sound source in the rectangular coordinate system to obtain the GPS position information corresponding to the sound source.
5. The method according to claim 4, wherein the performing inverse transformation on the coordinate position of the sound source in the orthogonal coordinate system to obtain the GPS position information corresponding to the sound source comprises:
based on the formula
lat＝latk+yπ/(N+alt)；
lon＝(x/(N+alt)+cos(latk)lonk/π)×π/cos(lat)；
alt＝z；
Performing inverse operation on the sound source coordinates of the abnormal fault sound of the power transmission channel to obtain GPS position information corresponding to the sound source;
wherein lat is the longitude of the sound source; lon is the latitude of the sound source; alt is the altitude of the sound source; latkAs the latitude of the reference point; y is a coordinate value of the sound source in the y direction in the rectangular coordinate system; n is the unified curvature radius; x is a coordinate value of the sound source in the x direction in the rectangular coordinate system; lonkIs the longitude of the reference point; z is a coordinate value of the sound source in the z direction in the rectangular coordinate system.
6. The method according to claim 1, wherein the obtaining of the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate position of the reference point in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual devices in the rectangular coordinate system, and the relative time differences between the other alarm records and the reference alarm record respectively comprises:
obtaining a first distance formula between a sound source and the reference point according to the corresponding coordinate position of the reference point in the rectangular coordinate system and a preset sound source coordinate; the preset sound source coordinates comprise coordinate parameters to be solved;
obtaining a second distance formula between the sound source and the other audio-visual equipment according to the corresponding coordinate positions of the other audio-visual equipment in the rectangular coordinate system and a preset sound source coordinate;
performing matrix transformation based on the first distance formula and the second distance formula;
and calculating the transformed matrix by a least square method to obtain a coordinate parameter to be solved in the preset sound source coordinate.
7. The method according to claim 1, wherein after receiving the alarm records sent by the plurality of audiovisual equipments installed on different high-voltage towers, the method further comprises:
classifying the audio-visual equipment according to the position coordinates of the audio-visual equipment so as to divide the audio-visual equipment with a distance difference value smaller than a preset distance difference value into the same category;
analyzing the alarm records corresponding to the audio-visual equipment of the same category, and determining abnormal data that the recorded starting time of the abnormal fault sound of the power transmission channel does not belong to a preset time range;
and eliminating the alarm records corresponding to the abnormal data.
8. The method according to claim 1, wherein before the obtaining of the audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record, the method further comprises:
classifying the collected audio information of the power transmission channel through a preset sound classification model in the audio-visual equipment, and uploading the audio information and the sound category corresponding to the audio information to a monitoring platform;
and under the condition that the audio information belongs to the category of the abnormal fault sound of the power transmission channel, performing positioning analysis on the abnormal fault sound of the power transmission channel.
9. The method according to claim 1, wherein the determining the relative time difference between each of the other alarm records and the reference alarm record specifically comprises:
determining first starting time of abnormal fault sound of the power transmission channel corresponding to the reference alarm record; and
determining second starting time of abnormal fault sounds of the power transmission channel corresponding to other alarm records;
and determining a time difference value between the first starting time and the second starting time, and taking the time difference value as the relative time difference so as to calculate the sound source coordinates through the relative time difference.
10. An apparatus for locating a power transmission channel abnormal fault sound, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to:
receiving alarm records respectively sent by a plurality of audio-visual equipment arranged on different high-voltage towers;
acquiring audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record;
selecting any one of the alarm records as a reference alarm record, and determining relative time differences between other alarm records and the reference alarm record respectively; wherein the relative time difference is a time difference of recording the audio information by different audio-visual equipment;
establishing a rectangular coordinate system by taking the audio-visual equipment corresponding to the reference alarm record as a reference point;
acquiring GPS information of other audio-visual equipment, and carrying out numerical value unification on the GPS information so as to obtain corresponding coordinate positions of the other audio-visual equipment in the rectangular coordinate system through the unified GPS information;
and obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system, the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system and the relative time difference between the other alarm records and the reference alarm record respectively.
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