CN114280413B - Positioning method and equipment for abnormal fault sound of power transmission channel - Google Patents
Positioning method and equipment for 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 devices installed 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 respectively; taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system; acquiring GPS information of other audio-visual equipment, and carrying out numerical 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 sounds of a power transmission channel.
Background
The transmission line is an important component of the power grid, and is influenced by human and natural conditions, so that various potential safety hazards often occur in the transmission line. Such as mechanical construction, various birds and the like. The transmission line monitoring device becomes a main monitoring mode. But is limited by the electric quantity, network and platform processing capacity of the monitoring device, and the current monitoring device shoots at fixed intervals, such as 30 minutes, 60 minutes and the like, and has a monitoring time blind area, so that the requirement on monitoring the faults of the power transmission line is difficult to meet.
Therefore, in the prior art, a lightning positioning system is generally adopted to monitor the environment of the power transmission line in real time, and the position judgment is carried out by comprehensively combining fault tower positioning and fault time given by a substation traveling wave ranging device, fault trace on site of the fault tower and whether lightning falls around the tower in the lightning positioning system.
However, the lightning positioning system needs more data when performing hidden danger positioning, and is difficult to position the hidden danger in a short time under the condition of emergency faults.
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: in the prior art, hidden danger positioning is difficult to be carried out 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 sounds of a power transmission channel. The method comprises the steps of receiving alarm records sent by a plurality of audio-visual devices installed on different high-voltage towers respectively; 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 respectively; wherein the relative time difference is the time difference of different audio-visual equipment to record audio information; taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system; acquiring GPS information of other audio-visual equipment, and carrying out numerical 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 records.
According to the method and the device for recording the abnormal sound of the power transmission channel, 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 recording the abnormal sound can be obtained, and the relative time difference recorded between different audio-visual devices is 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 transmission line monitoring mode of single timing photographing. In addition, according to the embodiment of the application, different types of sounds can be positioned, the problem that a lightning positioning system cannot position hidden dangers of other types of sounds such as mechanical construction is solved, the monitoring effect on a power transmission channel is obviously enhanced, meanwhile, GPS values are unified, the calculation process is simplified, and the hidden dangers can be positioned in a short time under the condition of emergency faults.
In one implementation manner of the present application, acquiring GPS information of other audio-visual 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 corresponding to other audio-visual equipment respectively; and respectively carrying out numerical unification on the altitude and the curvature radius.
According to the embodiment of the application, GPS position information corresponding to the audio-visual equipment is converted into coordinate values corresponding to the rectangular coordinate system. The method can reduce the calculation difficulty of calculating the sound source position, reduce the calculation error rate and enable the calculated sound source position to be more accurate. Secondly, because the distance measuring device is generally installed in plain areas, and each audio-visual equipment installation distance is relatively close, the altitude and the curvature radius can be unified in data, so that the calculation difficulty is further reduced, and the sound positioning efficiency is improved.
In an implementation manner of the present application, the coordinate positions corresponding to other audio-visual devices in the rectangular coordinate system are obtained through the unified GPS information, which specifically includes: based on the formula
x i ＝(N+alt)×(lat i /π-lat k /π)；
y i ＝(N+alt)×(cos(lat i )lon i /π-cos(lat k )lon k /π)；
z i ＝alt；
Determining coordinate values corresponding to other audio-visual equipment in a rectangular coordinate system; wherein x is i Coordinate values of the ith audio-visual equipment in the corresponding x direction in a rectangular coordinate system; y is i Coordinate values of the ith audio-visual equipment in the corresponding y direction in a rectangular coordinate system; z i Coordinate values of the ith audio-visual equipment in the z direction corresponding to the ith audio-visual equipment in the rectangular coordinate system; n is the curvature radius after unification; alt is the unified altitude; lat i Latitude for the ith audiovisual device; lat k Latitude as the reference point; lon (lon) i Longitude for the i-th audiovisual device; lon (lon) k Is the longitude of the reference point.
In an implementation manner of the present application, after obtaining the sound source coordinates of the abnormal fault sound of the power transmission channel, the method further includes: and carrying out inverse transformation on the coordinate positions of the sound sources in the rectangular coordinate system according to the longitude and latitude of the reference point, the unified curvature radius and the unified altitude, and obtaining GPS position information corresponding to the sound sources.
In one implementation manner of the present application, the inverse transformation is performed on the coordinate position of the sound source in the rectangular coordinate system to obtain the GPS position information corresponding to the sound source, which specifically includes: based on the formula
lat＝lat k +yπ/(N+alt)；
lon＝(x/(N+alt)+cos(lat k )lon k /π)×π/cos(lat)；
alt＝z；
Performing inverse operation on sound source coordinates of abnormal fault sounds of the power transmission channel to obtain GPS position information corresponding to the sound sourceExtinguishing; 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; lat k Latitude as the reference point; y is the coordinate value of the sound source in the y direction in the rectangular coordinate system; n is the curvature radius after unification; x is the coordinate value of the sound source in the x direction in the rectangular coordinate system; lon (lon) k Longitude as a reference point; z is the coordinate value of the sound source in the z direction in the rectangular coordinate system.
In one implementation manner of the present application, based on the coordinate positions corresponding to the reference points in the rectangular coordinate system, the coordinate positions corresponding to other audio-visual devices in the rectangular coordinate system, and the relative time differences between other alarm records and the reference alarm records, the sound source coordinates of the abnormal fault sound of the power transmission channel are obtained, and specifically include: obtaining a first distance formula between a sound source and a reference point according to the corresponding coordinate position of the reference point in a rectangular coordinate system and preset sound source coordinates; the method comprises the steps that a coordinate parameter to be solved is included in preset sound source coordinates; obtaining a second distance formula between the sound source and other audio-visual equipment according to the corresponding coordinate positions of the other audio-visual equipment in the rectangular coordinate system and preset sound source coordinates; 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 coordinates.
In one implementation of the present application, after receiving the alarm records sent by the plurality of audio-visual 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 value smaller than the preset distance difference value into the same category; analyzing the alarm records corresponding to the audio-visual equipment of the same category, and determining that the starting time of the recorded abnormal fault sounds of the transmission channel does not belong to abnormal data of a preset time range; and eliminating the alarm record corresponding to the abnormal data.
According to the method and the device, the audio-visual equipment is classified, so that the audio-visual equipment in the adjacent range is classified into the same category. Because the moments when the abnormal sounds are received by the audiovisual devices in the vicinity are similar, the starting moments of recording the abnormal sounds are also similar. The abnormal record time can be removed through comparison, so that more accurate and reliable data participating in positioning calculation is ensured.
In an implementation manner of the present application, before obtaining the audio information of the abnormal fault sound of the power transmission channel recorded in the alarm record, the method further includes: classifying the acquired audio information of the power transmission channel through a preset sound classification model in the audio-visual equipment, and uploading the audio information and sound types corresponding to the audio information to a monitoring platform; and under the condition that the audio information belongs to the abnormal fault sound category of the power transmission channel, carrying out positioning analysis on the abnormal fault sound of the power transmission channel.
In one implementation of the present application, determining the relative time difference between the other alarm records and the reference alarm record respectively specifically includes: determining a first starting time of abnormal fault sounds of the power transmission channel corresponding to the reference alarm record; determining a 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 a relative time difference to calculate the sound source coordinates through the relative time difference.
The embodiment of the application provides a positioning device for abnormal fault sounds of a power transmission channel, which comprises the following components: 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, the instructions being 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 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 respectively; wherein the relative time difference is the time difference of different audio-visual equipment to record audio information; taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system; acquiring GPS information of other audio-visual equipment, and carrying out numerical 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 records.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect: according to the method and the device for recording the abnormal sound of the power transmission channel, 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 recording the abnormal sound can be obtained, and the relative time difference recorded between different audio-visual devices is 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 transmission line monitoring mode of single timing photographing. In addition, according to the embodiment of the application, different types of sounds can be positioned, the problem that a lightning positioning system cannot position hidden dangers of other types of sounds such as mechanical construction is solved, the monitoring effect on a power transmission channel is obviously enhanced, meanwhile, GPS values are unified, the calculation process is simplified, and the hidden dangers can be positioned in a short time under the condition of emergency faults.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art. In the drawings:
fig. 1 is a flowchart of a method for locating abnormal fault sounds of a power transmission channel according to an embodiment of the present application;
fig. 2 is a flow chart of a method for locating abnormal fault sounds of a power transmission channel according to an embodiment of the present application;
fig. 3 is a first exemplary diagram of positioning abnormal fault sounds of a power transmission channel according to an embodiment of the present application;
fig. 4 is a second exemplary diagram of positioning abnormal fault sounds of a power transmission channel according to an embodiment of the present application;
fig. 5 is a third exemplary diagram of abnormal fault sound localization of a power transmission channel according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a positioning device for abnormal fault sounds of 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 sounds of a power transmission channel.
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
The transmission line is an important component of the power grid, and is influenced by human and natural conditions, so that various potential safety hazards often occur in the transmission line. Such as mechanical construction, various birds and the like. The transmission line monitoring device becomes a main monitoring mode. But is limited by the electric quantity, network and platform processing capacity of the monitoring device, and the current monitoring device shoots at fixed intervals, such as 30 minutes, 60 minutes and the like, and has a monitoring time blind area, so that the requirement on monitoring the faults of the power transmission line is difficult to meet.
Therefore, in the prior art, a lightning positioning system is generally adopted to monitor the environment of the power transmission line in real time, and the position judgment is carried out by comprehensively combining fault tower positioning and fault time given by a substation traveling wave ranging device, fault trace on site of the fault tower and whether lightning falls around the tower in the lightning positioning system.
However, the lightning positioning system needs more data when performing hidden danger positioning, and is difficult to position the hidden danger in a short time under the condition of emergency faults.
In order to solve the above problems, embodiments of the present application provide a method and an apparatus for locating abnormal fault sounds of a power transmission channel. By acquiring the audio information of the abnormal fault sounds of the power transmission channel recorded in the alarm records, the starting time of each audio-visual device for starting recording the abnormal sounds can be obtained, and therefore the relative time difference recorded between different audio-visual devices is 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 transmission line monitoring mode of single timing photographing. In addition, according to the embodiment of the application, different types of sounds can be positioned, the problem that a lightning positioning system cannot position hidden dangers of other types of sounds such as mechanical construction is solved, the monitoring effect on a power transmission channel is obviously enhanced, meanwhile, GPS values are unified, the calculation process is simplified, and the hidden dangers can be positioned in a short time under the condition of emergency faults.
The following describes in detail the technical solution proposed in the embodiments of the present application through the accompanying drawings.
Fig. 1 is a flowchart of a method for locating abnormal fault sounds of a power transmission channel according to an embodiment of the present application. As shown in fig. 1, the method for locating abnormal fault sounds of 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 one embodiment of the application, the collected audio information of the power transmission channel is classified through a preset sound classification model in the audio-visual equipment, and the audio information and the sound category corresponding to the audio information are uploaded to the monitoring platform. And under the condition that the audio information belongs to the abnormal fault sound category of the power transmission channel, the monitoring platform performs positioning analysis on the abnormal fault sound of the power transmission channel.
Specifically, audio-visual equipment installed on different high-voltage towers collects environmental sounds of a transmission line channel in real time, classifies the environmental sounds by using a classification neural network, and classifies target sounds such as mechanical construction, thunder and the like. The method comprises the steps of transmitting the GPS information to a monitoring platform through an http protocol, wherein the transmitted fields comprise a sound alarm type, a sound acquisition time, the 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, and determines whether the current sound has an influence on the power transmission line according to alarm types in the records, so that the location analysis is carried out on the sound positions with the influence.
S102, the monitoring platform acquires audio information of abnormal fault sounds of the power transmission channel recorded in the alarm record.
In one embodiment of the present application, the monitoring platform obtains audio information in the alert record, and determines a start 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 a sound waveform appears from the 3 rd s, so that the audio-visual apparatus receives an abnormal sound from the 3 rd s and starts recording the abnormal sound.
In one embodiment of the application, the monitoring platform classifies the audio-visual devices according to the position coordinates of the audio-visual devices to classify the audio-visual devices having a distance difference less than a preset distance difference into the same class. The monitoring platform analyzes the alarm records corresponding to the same class of audio-visual equipment, and determines that the starting time of the recorded abnormal fault sounds of the power transmission channel does not belong to abnormal data in a preset time range. And eliminating the alarm record corresponding to the abnormal data.
Specifically, the monitoring platform classifies the audio-visual equipment according to GPS position information corresponding to each audio-visual equipment. The audiovisual devices located nearby are classified into the same category. Because the time when the adjacent audiovisual devices receive the abnormal sound is approximate, the starting time of the audiovisual devices in the same category for monitoring the abnormal sound can be compared. The equipment with larger time difference from 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 time for starting recording of sound corresponding to a plurality of audio-visual devices located close to each other is 3s, 4s, 3.5s, 3s, 6s, respectively. At this time, it can be seen that the recording time is 6s and the recording time is greatly different from other recording times, so that 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 audio-visual equipment is classified, so that the audio-visual equipment in the adjacent range is classified into the same category. Because the moments when the abnormal sounds are received by the audiovisual devices in the vicinity are similar, the starting moments of recording the abnormal sounds are also similar. The abnormal record time can be removed through comparison, so that more accurate and reliable data participating in positioning calculation is ensured.
S103, the monitoring platform selects any one of the alarm records as a reference alarm record, and determines the relative time difference between the other alarm records and the reference alarm record respectively.
In one embodiment of the present application, a first start time of a transmission channel abnormal fault sound corresponding to a reference alarm record is determined. And determining a second starting time of abnormal fault sounds of the power transmission channel corresponding to other alarm records. A time difference between the first start time and the second start time is determined and the time difference is taken as a relative time difference.
Specifically, any one alarm record is selected as a reference alarm record in the alarm record set after abnormal data are removed, and the relative time difference between other alarm records and the reference alarm record is calculated. Wherein the relative time difference is the time difference of recording the audio information by different audio-visual devices.
Further, determining the moment of receiving the abnormal sound corresponding to the reference alarm record, determining the moment of receiving the abnormal sound by other audio-visual equipment, and calculating the time difference between the moment and the moment, wherein the time difference is the relative time difference between the other alarm record and the reference alarm record. For example, assuming that the time at which the abnormal sound is received corresponding to the reference warning record is 4s, the time at which the abnormal sound is received corresponding to the other reference warning record is 5s, the relative time difference between the two is 1s.
Further, according to the formula
r 1 (t)＝s(t)+n 1 (t)；
r 2 (t)＝s(t-D)+n 2 (t)；
R 1,2 (τ)＝E{r 1 (t)×r 2 (t+τ)}；
D＝argmaxR 1,2 (τ)
The time delay, i.e. the relative time difference, is calculated using the cross-correlation. Wherein D is the relative time difference, R 1,2 (τ) is a cross-correlation representation between two audiovisual devices; n is n 1 (t) is noise collected by the first audio-visual equipment, n 2 (t) noise collected for the second audio-visual device. s (t) is the target sound signal, r 1 (t) receiving sound at time D for the first audio-visual device, r 2 (t) receiving sound for the second audio-visual device after a relative time difference has elapsed.
S104, the monitoring platform takes the audio-visual equipment corresponding to the reference alarm record as a reference point, and a rectangular coordinate system is established.
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 comprises latitude, longitude, altitude and curvature radius corresponding to other audiovisual equipment respectively. And respectively carrying out numerical unification on the altitude and the curvature radius. And determining coordinate values corresponding to other audio-visual equipment in a rectangular coordinate system based on the GPS information with unified values.
Specifically, in the environment of collecting hidden danger sounds of a power transmission channel according to the embodiment of the present application, the installation positions of the audio-visual devices are separated by a short distance (less than 5 km), and the installation heights are similar, so that each audio-visual device installation position can be regarded as being on a plane. And taking the audio-visual equipment corresponding to the reference alarm record as a reference point, taking the north direction as the y axis and the east direction as the x axis, and taking the vertical ground as the z axis direction to establish a space Cartesian coordinate system.
According to the embodiment of the application, GPS position information corresponding to the audio-visual equipment is converted into coordinate values corresponding to the rectangular coordinate system. The method can reduce the calculation difficulty of calculating the sound source position, reduce the calculation error rate and enable the calculated sound source position to be more accurate. Secondly, because the distance measuring device is generally installed in plain areas, and each audio-visual equipment installation distance is relatively close, the altitude and the curvature radius can be unified in data, so that the calculation difficulty is further reduced, and the sound positioning efficiency is improved.
And S105, the monitoring platform acquires GPS information of other audio-visual equipment, and performs numerical 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.
In one embodiment of the present application, if the coordinates of the kth audio-visual device are taken as the reference origin, the distance formula between the other audio-visual devices and the reference origin is as follows:
the X direction is:
x i ＝(N i +alt i )×lat i /π-(N k +alt k )×lat k /π；
the Y direction is:
y i ＝(N i +alt i )×cos(lat i )lon i /π-(N k +H k )cos(lat k )lon k /π)；
the Z direction is:
z i ＝lat i -lat k
in one embodiment of the present application, the device for ranging is located in a plain area, and the distance between the audiovisual devices is within 5km, so that the radius of curvature values of the mounting points of the respective audiovisual devices can be regarded as the same, and the mounting heights can be regarded as the same height.
Specifically, based on the formula
x i ＝(N+alt)×(lat i /π-lat k /π)；
y i ＝(N+alt)×(cos(lat i )lon i /π-cos(lat k )lon k /π)；
z i ＝alt；
Wherein,
and converting GPS information corresponding to other audio-visual equipment into coordinate values corresponding to a rectangular coordinate system. Wherein x is i Coordinate values of the ith audio-visual equipment in the corresponding x direction in a rectangular coordinate system; y is i Coordinate values of the ith audio-visual equipment in the corresponding y direction in a rectangular coordinate system; z i Coordinate values of the ith audio-visual equipment in the z direction corresponding to the ith audio-visual equipment in the rectangular coordinate system; n is the curvature radius after unification; alt is the unified altitude; lat i Latitude for the ith audiovisual device; lat k Latitude as the reference point; lon (lon) i Longitude for the i-th audiovisual device; lon (lon) k Is the longitude of the reference point.
S106, the monitoring platform obtains sound source coordinates of abnormal fault sounds of the power transmission channel based on the corresponding coordinate positions of the reference points in the rectangular coordinate system and 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 records.
In one 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 the other audio-visual equipment and 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 coordinates.
Specifically, the audio-visual equipment corresponding to the reference alarm record is taken as a reference point, and the moment when the equipment collects the target sound is taken as zero moment. The moment when the sound source generates sound is preset as t, and the coordinates are (x, y, z). The other audio-visual acquisition device i receives the sound at the moment ti, its coordinate position is (xi, yi, zi), let k be the speed of sound (340 m/s).
The first distance formula from the sound source to the reference point can be obtained as follows:
x 2 +y 2 +z 2 ＝k 2 t 2
the second distance formula of the sound source to the other audio-visual equipment i is:
(x-x i ) 2 +(y-y i ) 2 +(z-z i ) 2 ＝k 2 (t-t i ) 2
simplifying the first distance formula and the second distance formula to obtain
x i *x+y i *y+z i *z-k 2 *t i *t＝(x i 2 +y i 2 +z i 2 -k 2 *t i 2 )/2
Namely:
the matrix form is as follows:
order the
I.e. ax=b
And solving by using a least square method of a linear equation set to obtain:
X＝(A T A) -1 A T B
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 one 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.
Specifically, based on the formula
lat＝lat k +yπ/(N+alt)；
lon＝(x/(N+alt)+cos(lat k )lon k /π)×π/cos(lat)；
alt＝z；
And performing inverse operation on the sound source coordinates of the abnormal fault sounds 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; lat k Latitude as the reference point; y is the coordinate value of the sound source in the y direction in the rectangular coordinate system; n is the curvature radius after unification; x is the coordinate value of the sound source in the x direction in the rectangular coordinate system; lonk is the longitude of the reference point; z is the coordinate value of the sound source in the z direction in the rectangular coordinate system.
The embodiment of the application gets rid of a transmission line monitoring mode of single timing photographing. In addition, according to the embodiment of the application, different types of sounds can be positioned, the problem that a lightning positioning system cannot position hidden dangers of other types of sounds such as mechanical construction is solved, and the monitoring effect on a power transmission channel is obviously enhanced.
Fig. 2 is a flow chart of a method for locating 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 sounds of the power transmission channel is as follows:
in one embodiment of the application, the audio-visual device performs sound collection on the power transmission line, and inputs the collected sound into a preset neural network model to classify the collected sound.
In one embodiment of the present application, the audio-visual device uploads the collected audio information and the sound category corresponding to the audio to the monitoring platform. The monitoring platform screens the received alarm records and deletes the abnormal data.
In one embodiment of the present application, the monitoring platform selects an alarm record as a reference alarm record, and uses an 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, so that the GPS position of the audio-visual equipment is converted into a coordinate position of the coordinate system.
In one embodiment of the application, the monitoring platform calculates the relative time difference between other alarm records and the reference alarm record, and locates the hidden danger sound through the relative time difference and the established rectangular coordinate system.
Fig. 3 is a first exemplary diagram for locating abnormal faults of a power transmission channel according to an embodiment of the present application. Fig. 4 is a second exemplary diagram for locating abnormal faults of a power transmission channel according to an embodiment of the present application. Fig. 5 is a third exemplary diagram for locating abnormal faults of a power transmission channel according to an embodiment of the present application. As shown in fig. 3, 4 and 5, the coordinate point at the center is the calculated sound source position, and the point A1, the point A2 and the point A3 in the circle are the actual sound source points, respectively. By means of the embodiments shown in fig. 3, 4 and 5, it can be seen that the positioning method in the embodiment of the present application has a smaller error, and meets the current actual requirements.
Fig. 6 is a schematic structural diagram of a positioning device for abnormal fault sounds of a power transmission channel according to an embodiment of the present application. As shown in fig. 6, the positioning apparatus of abnormal fault sound of a power transmission channel includes:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
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 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 one of the alarm records as a reference alarm record, and determining the relative time difference between the other alarm records and the reference alarm record respectively; wherein the relative time difference is the time difference of different audio-visual equipment to record the audio information;
taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system;
acquiring GPS information of other audio-visual equipment, and carrying out numerical 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 records.
All embodiments in the application are described in a progressive manner, and identical and similar parts of all embodiments are mutually referred, so that each embodiment mainly describes differences from other embodiments. In particular, for apparatus, devices, non-volatile computer storage medium embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the section of the method embodiments being relevant.
The foregoing describes specific embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can 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 are also possible or may be advantageous.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the embodiments of the present application will be apparent to those skilled in the art. 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 (7)
1. The method for locating abnormal fault sounds of the power transmission channel is characterized by comprising the following steps:
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 one of the alarm records as a reference alarm record, and determining the relative time difference between the other alarm records and the reference alarm record respectively; wherein the relative time difference is the time difference of different audio-visual equipment to record the audio information;
taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system;
acquiring GPS information of other audio-visual equipment, and carrying out numerical 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; the GPS information comprises latitude, longitude, altitude and curvature radius corresponding to the other audio-visual equipment respectively;
obtaining sound source coordinates of abnormal fault sounds 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 differences between other alarm records and the reference alarm records;
the GPS information is numerically unified, including respectively numerically unifying the altitude and the curvature radius;
according to 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 GPS position information corresponding to the sound source;
the method for obtaining the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system through the unified GPS information specifically comprises the following steps:
based on the formula
；
；
；
Determining coordinate values corresponding to the other audio-visual equipment in a rectangular coordinate system; wherein,coordinate values of the ith audio-visual equipment in the x direction corresponding to the rectangular coordinate system; />Coordinate values of the ith audio-visual equipment in the y direction corresponding to the rectangular coordinate system; />Coordinate values of the ith audio-visual equipment in the z direction corresponding to the rectangular coordinate system; />The curvature radius is uniform; />The altitude is unified; />Latitude for the ith audiovisual device; />Latitude as the reference point; />Longitude for the i-th audiovisual device; />Is the longitude of the reference point.
2. The method for locating abnormal fault sounds of a power transmission channel according to claim 1, wherein the performing inverse transformation on the coordinate positions of sound sources in a rectangular coordinate system to obtain GPS position information corresponding to the sound sources specifically comprises:
based on the formula
；
；
；
Performing inverse operation on sound source coordinates of abnormal fault sounds of the power transmission channel to obtain GPS position information corresponding to the sound source;
wherein,longitude for the sound source; />The latitude of the sound source is; />The altitude of the sound source is; />Latitude as the reference point; />Coordinate values of the sound source in the y direction in a rectangular coordinate system; />The curvature radius is uniform; />Coordinate values of the sound source in the x direction in a rectangular coordinate system; />Longitude as a reference point; />Is the coordinate value of the sound source in the z direction in the rectangular coordinate system.
3. The method for positioning abnormal sound of power transmission channel according to claim 1, wherein the obtaining the sound source coordinates of the abnormal sound of power transmission channel based on the corresponding coordinate positions 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 records, respectively, specifically includes:
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 preset sound source coordinates; 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 coordinate positions of the other audio-visual equipment corresponding to the rectangular coordinate system and preset sound source coordinates;
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 the coordinate parameters to be solved in the preset sound source coordinates.
4. The method for locating abnormal sounds of power transmission channel according to claim 1, wherein after receiving the alarm records transmitted by the plurality of audio-visual devices installed on different high voltage towers, respectively, 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 the 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 that the starting time of the recorded abnormal fault sounds of the transmission channel does not belong to abnormal data of a preset time range;
and eliminating the alarm record corresponding to the abnormal data.
5. The method for locating abnormal sound of power transmission channel according to claim 1, wherein before the audio information of the abnormal sound of power transmission channel recorded in the alarm record is obtained, the method further comprises:
classifying the acquired audio information of the power transmission channel through a preset sound classification model in the audio-visual equipment, and uploading the audio information and sound types corresponding to the audio information to a monitoring platform;
and under the condition that the audio information belongs to the abnormal fault sound category of the power transmission channel, carrying out positioning analysis on the abnormal fault sound of the power transmission channel.
6. The method for locating abnormal fault sounds of a power transmission channel according to claim 1, wherein determining the relative time differences between the other alarm records and the reference alarm record respectively comprises:
determining a first starting time of abnormal fault sounds of the power transmission channel corresponding to the reference alarm record; and
determining a 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 to calculate sound source coordinates through the relative time difference.
7. A power transmission channel abnormal fault sound localization apparatus comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
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 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 one of the alarm records as a reference alarm record, and determining the relative time difference between the other alarm records and the reference alarm record respectively; wherein the relative time difference is the time difference of different audio-visual equipment to record the audio information;
taking the audio-visual equipment corresponding to the reference alarm record as a reference point, and establishing a rectangular coordinate system;
acquiring GPS information of other audio-visual equipment, and carrying out numerical 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; the GPS information comprises latitude, longitude, altitude and curvature radius corresponding to the other audio-visual equipment respectively;
obtaining sound source coordinates of abnormal fault sounds 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 differences between other alarm records and the reference alarm records;
the GPS information is numerically unified, including respectively numerically unifying the altitude and the curvature radius;
according to 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 GPS position information corresponding to the sound source;
the method for obtaining the corresponding coordinate positions of other audio-visual equipment in the rectangular coordinate system through the unified GPS information specifically comprises the following steps:
based on the formula
；
；
；
Determining said otherCoordinate values corresponding to the audio-visual equipment in a rectangular coordinate system; wherein,coordinate values of the ith audio-visual equipment in the x direction corresponding to the rectangular coordinate system; />Coordinate values of the ith audio-visual equipment in the y direction corresponding to the rectangular coordinate system; />Coordinate values of the ith audio-visual equipment in the z direction corresponding to the rectangular coordinate system; />The curvature radius is uniform; />The altitude is unified; />Latitude for the ith audiovisual device; />Latitude as the reference point; />Longitude for the i-th audiovisual device; />Is the longitude of the reference point.
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