CN116456376A - Method and system for controlling signal measuring station in radio detection network - Google Patents
Method and system for controlling signal measuring station in radio detection network Download PDFInfo
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- H—ELECTRICITY
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a control method and a system of a signal measuring station in a radio detection network, which are applied to a measuring station control system, wherein the method comprises the following steps: acquiring actual coordinates of each test signal source, selecting a target signal source according to the actual coordinates, and transmitting a test instruction to the target signal source so that the target signal source transmits a test signal; each measuring station in a working state receives the test signals, positions each target signal source to obtain a positioning result of the target signal source, determines a positioning error of the target signal source according to a difference value between the positioning result and the actual coordinates, and measures the signal intensity of the target signal source; determining whether the target signal source is in a blind area according to the positioning error and the signal intensity; if yes, a wake-up instruction is transmitted to the target standby measuring station capable of detecting the blind area so that the target standby measuring station receives the radio signal. By applying the embodiment of the invention, the blind area can be determined, and blind compensation treatment can be carried out on the blind area.
Description
Technical Field
The invention relates to the technical field of radio orientation, in particular to a method and a system for controlling a signal measuring station in a radio detection network.
Background
It is highly necessary to locate the radiation sources in the city to identify unregistered radio transmitters in the city, and thus radio detection techniques are a necessary method of locating the radiation sources.
The invention patent with the application number of 201610864207.2 in the prior art discloses a monitoring wireless sensor network system with a hybrid positioning function and a method thereof, wherein the monitoring wireless sensor network system consists of four parts, namely a wireless sensor node, a sink node, a reference station and an upper computer; the GPS positioning network composed of the reference station, the wireless sensor node and the sink node realizes rough positioning of each node, and then the received signal intensity value sent to the related sink node by the wireless sensor node is utilized to determine the distance between the wireless sensor node and the sink node through a mathematical model so as to realize accurate positioning; the wireless sensor nodes and the related sink nodes perform data transmission through a specific network topological structure, the GPRS module of the sink node transmits the data of the wireless sensor nodes and the wireless sensor nodes to an upper computer, and then data storage and processing operations are sequentially performed. The method is used for realizing accurate positioning of each node while carrying out wireless data transmission on the structural monitoring, effectively reducing the difficulty of post-processing of the structural monitoring data and reducing the waste of personnel and funds.
In the prior art, the positioning time of a GPS is used as the reference time for data acquisition of a sensor, and a GPRS module is used for realizing data transmission between each sink node and an upper computer. The prior art only discloses a data transmission mode, and the problem that how to reduce blind areas caused by more complicated radiation environments in cities is a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a control method and a system for a signal measuring station in a radio detection network.
The invention solves the technical problems through the following technical scheme:
the invention provides a signal measuring station control method in a radio detection network, which is applied to a measuring station control system and comprises the following steps:
acquiring actual coordinates of each test signal source, selecting a target signal source according to the actual coordinates, and transmitting a test instruction to the target signal source so that the target signal source transmits a test signal;
each measuring station in a working state receives the test signals, positions each target signal source to obtain a positioning result of the target signal source, determines a positioning error of the target signal source according to a difference value between the positioning result and the actual coordinates, and measures the signal intensity of the target signal source;
determining whether the target signal source is in a blind area according to the positioning error and the signal intensity;
if yes, a wake-up instruction is transmitted to the target standby measuring station capable of detecting the blind area so that the target standby measuring station receives the radio signal.
Optionally, the acquiring the actual coordinates of each test signal source includes:
and sending a positioning instruction to each test signal source by using the optical fiber communication network so that the test signal source takes the satellite positioning result as an actual coordinate.
Optionally, the selecting a target signal source according to the actual coordinates includes:
determining a propagation path of signals of each test signal source to each measuring station according to satellite positioning results of each test signal source and satellite positioning results of the measuring station;
acquiring attenuation data of each object on the propagation path on signals; wherein the object comprises: one or a combination of buildings and trees;
according to the signal intensity of each test signal source and the attenuation data, calculating the final signal intensity of each test signal source reaching the measuring station, and judging whether the final signal intensity is larger than a set threshold value;
if yes, the test signal source is used as a target signal source.
Optionally, the selecting a target signal source according to the actual coordinates includes:
screening a plurality of signal sources from a signal source set containing all the signal sources to serve as test signal sources;
setting sampling points on a propagation path of each test signal source reaching the measuring station according to a preset interval, and calculating signal intensity at each sampling point according to attenuation data of signals of each object on the propagation path, wherein the object comprises: one or a combination of buildings and trees;
drawing an equal-strength line according to the signal intensity value at each sampling point; taking the equal-strength line with the corresponding signal strength equal to the set threshold value as a target equal-strength line;
performing symmetrical transformation processing on the target equal-strength line by taking the center point of the target equal-strength line as a symmetrical center to obtain a target line;
and taking all signal sources in the area surrounded by the target line as target signal sources.
Optionally, the screening a plurality of signal sources from the signal source set including all signal sources as the test signal sources includes:
dividing a control area into a plurality of grids, and determining the target number of signal sources according to the projection duty ratio of buildings in the grids, wherein the control area is an area in which unknown signal sources need to be positioned by using a measuring station;
and taking the set of the target number of signal sources randomly extracted from each grid as a test signal source.
Optionally, the performing symmetric transformation processing on the target equal-strength line with the center point of the target equal-strength line as a symmetric center to obtain a target line includes:
dividing a target equal-strength line into a plurality of sections of curves according to a set length, and symmetrically transforming the curves by taking the center point of each section of curve as a symmetry center to obtain transformed curve sections;
and connecting the head and tail of each transformed curve segment in sequence to obtain a target line.
Optionally, the method further comprises:
acquiring a first area surrounded by a target line of a target standby measuring station and a second area corresponding to each measuring station in a working state;
and converting the measuring stations in operation corresponding to the second areas which are all located in the first areas into standby measuring stations.
Optionally, the determining whether the target signal source is in a blind area according to the positioning error and the signal strength includes:
calculating the positioning accuracy of the target signal source by using a formula, f= -w1+w2 x D, determining that the target signal source lower than the set value is in a dead zone according to the positioning accuracy, wherein,
f is the positioning accuracy of the target signal source; w1 is the weight corresponding to the positioning error; l is the normalized positioning error; w2 is the weight corresponding to the signal intensity; d is the normalized signal strength.
Optionally, the transmitting a wake-up instruction to the target standby measurement station capable of detecting the blind area includes:
and acquiring a third area surrounded by target lines corresponding to each standby measuring station, judging whether the third area comprises a blind area, if so, taking the standby measuring station as a target standby measuring station, and transmitting a wake-up instruction to the target standby measuring station.
The invention also provides a signal measuring station control system in a radio detection network, which comprises:
a measuring station control system as claimed in any one of the preceding claims;
a signal source;
a measuring station in an operating state and a standby measuring station.
Compared with the prior art, the invention has the following advantages:
by applying the embodiment of the invention, the test signal source sends the test signal, and the positioning effect of the test signal source is determined according to the test signal, and when the test signal source is positioned at the blind area position with the non-ideal positioning result, the standby measuring station is used for blind compensation operation, so that the blind area is eliminated.
Drawings
Fig. 1 is a schematic flow chart of a control method of a signal measuring station in a radio detection network according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a process of selecting a target signal source by a signal measurement station in a radio detection network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another process of selecting a target signal source by a signal measurement station in a radio detection network according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another principle of a method for controlling a signal measurement station in a radio detection network according to an embodiment of the present invention.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
Example 1
In order to facilitate understanding of the technical scheme of the embodiment of the invention, the embodiment of the invention firstly introduces an application scene. In urban environments, since electromagnetic radiation states are complicated due to high buildings, various billboards, wireless transmitting devices and the like, a plurality of measuring stations are required to be arranged for positioning signal sources. However, a limited number of measuring stations cannot achieve non-blind coverage, so in the embodiment of the invention, a plurality of measuring stations, a standby measuring station, a measuring station control system and a plurality of test signal sources are provided. The measuring station control system is used for controlling the measuring station and the test signal source to work, the test signal source is used for transmitting the test signal, the measuring station is used for receiving the signal and positioning the test signal source, the blind area position is determined according to the positioning result of the test signal source, then the standby measuring station is controlled to start, and the standby measuring station is used for blind compensation operation on the blind area.
The following is a specific implementation procedure of the embodiment of the present invention.
Fig. 1 is a flow chart of a method for controlling a signal measuring station in a radio detection network according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps.
S101: and acquiring actual coordinates of each test signal source, selecting a target signal source according to the actual coordinates, and transmitting a test instruction to the target signal source so as to enable the target signal source to transmit a test signal.
In practical application China, the test signal source can be a mobile phone of a user or an amateur radio station of a radio fan. Firstly, the mobile phone of the user and the amateur radio station of the radio fan are connected to the optical fiber network, and the control software can control the mobile phone and the business radio station to be connected to the network, and of course, corresponding hardware support is needed under the condition that the user needs to be connected to the network, and the embodiment of the invention is not repeated here. Moreover, the control software is installed on the mobile phone of the user, and the control software can control the mobile phone of the user to receive various instructions sent by the control system of the measuring station, and can control the mobile phone of the user to improve the instantaneous transmitting power, for example, the minimum power sent by the GSM mobile phone is only 5dBm (GSM 900) and about 3.2mW, but the maximum power sent by the GSM mobile phone can be 33dBm (GSM 900) and about 2W, so that the mobile phone of the user can be used as a target signal source to transmit a test signal. In addition, the control software can also carry out hash processing according to the MAC information, the IP address information and/or the password information set by the user of the mobile phone of the user to obtain the unique serial number of the user using the control software, and then the unique serial number is modulated into the test signal, so that the mobile phone can be conveniently identified by the control system of the measuring station when the test signal is received. Finally, the control software can also modulate the actual coordinates of the mobile phone of the user into the test signal and transmit the test signal. Similarly, the control software described above may be installed on amateur radio stations to perform the functions described above. Of course, the user's mobile phone and amateur radio station may be connected to the radio detection network by the radio management department or by voluntary gratuitous. Furthermore, the mobile phone of the user and the amateur radio station of the radio fan can be connected into the radio detection network, and specific roles can be determined according to actual requirements, for example, the mobile phone can be used as a test signal source and also can be used as a standby measuring station; the amateur radio station of the radio fan can be used as a test signal source and also as a stand-by measuring station.
Taking an amateur radio station with a test signal source as a radio fan as an example, a measuring station control system sends actual coordinate reporting instructions to routers or gateways connected with all service radio stations by using an optical fiber communication network, and the service radio stations acquire the reporting instructions from the gateways or routers by using a hardware terminal or control software. After receiving the report instruction, the amateur radio station sends the actual coordinates of the current moment and the unique serial number of the user to the measuring station control system.
After the measuring station control system obtains the actual coordinates of all the test signal sources, a target signal source is selected according to the actual coordinates. Fig. 2 is a schematic diagram of a process of selecting a target signal source by a signal measurement station in a radio detection network according to an embodiment of the present invention, and as shown in fig. 2, the specific selection process is as follows:
the following process is performed for each measuring station, and in example 1 of the present invention, the measuring station 1 is taken as an example. In practical use, the coordinates of the measuring station 1 are known, and in this step, the actual coordinates of the respective test signal sources are also acquired, so that the transmission path of the radio wave as the test signal when transmitted along a straight line can be obtained from the coordinates of the two. It should be emphasized that the transmission path is a virtual transmission path, since the test signal source has not yet issued a signal under test; in addition, electromagnetic waves are refracted, scattered, and reflected to some extent in urban environments, but as the propagation path extends, the signals are continuously attenuated, and the signals are strongest, generally, signals propagating along a straight line.
Then, as shown in fig. 2, the properties of the object passing through the propagation path are obtained from the three-dimensional city map, and in fig. 2, the rectangle is the projection of the object obtained from the three-dimensional city map on the horizontal plane. And determining the attenuation coefficient of the object according to the property of the object, and determining the attenuation data of the object to the test signal according to the size of the object. The object comprises: one or a combination of buildings and trees. In practice, to simplify the calculation, the same attenuation coefficient may be used for houses of the same structural type, for example, different buildings in residential areas differ only in layer height and position, are constructed substantially identically to the materials, and therefore the same attenuation coefficient may be used. To further simplify the computation, each building may be reduced to a cube for computation of attenuation data.
The intensities of the signals emitted by different test signal sources are different, so that the final signal intensity of each test signal source reaching the measuring station can be obtained by subtracting the attenuation data from the intensity of the signals emitted by the test signal sources, and then whether the final signal intensity is larger than a set threshold value is judged; if yes, the test signal source is used as a target signal source.
The measuring station control system transmits test instructions to each target signal source, and the target signal source transmits test signals according to preset transmitting power, transmitting time and transmitting direction after receiving the test instructions from the gateway of the target signal source.
Furthermore, in practical application, in order to avoid interference between signals caused by transmitting test signals at the same time and reduce influence on normal communication activities, the measuring station is convenient to locate target signal sources, and each target signal source avoids transmitting test signals at the same time. The test instructions transmitted by the measuring station control system to the target signal sources can also comprise the transmitting time. The generation process of the transmitting moment is as follows: and the measuring station control system sequences all the target signal sources, gives the transmitting time to all the target signal sources according to the sequencing result, and sequentially transmits the test signals according to the transmitting time after all the target signal sources receive the transmitting time.
S102: each measuring station in a working state receives the test signals, positions each target signal source to obtain a positioning result of the target signal source, determines the positioning error of the target signal source according to the difference value between the positioning result and the actual coordinates, and measures the signal intensity of the target signal source.
In practical application, the measuring stations can be divided into three types according to the working state, one type is the measuring station in the working state, the other type is the measuring station in the dormant state and can be awakened at any time, and the measuring station is a standby measuring station; the third is a measuring station in an inspection state, and in the embodiment of the invention, the measuring station in the inspection state is not considered, and only the measuring station in the working state and the standby measuring station are considered.
Taking the test signal emitted by the target signal source 1 as an example, the measuring station 1, the measuring station 2 and the measuring station 3 in a working state respectively receive the test signal, and then the three measuring stations jointly perform time difference positioning or phase difference positioning on the test signal to obtain a positioning result 1 of each target signal source.
The distance from the positioning result 1 to the actual coordinates 1 is calculated, the distance is used as a positioning error, and the positioning error 1 is used as the positioning errors 1 of the measuring station 1, the measuring station 2 and the measuring station 3. At the same time, the signal strength of the measurement signal emitted by the target signal source reaching the measurement station needs to be measured.
Further, when the target signal source 2 transmits the test signal, the three measuring stations 1, 2 and 5 in the working state respectively receive the test signal, and then the three measuring stations 1, 2 and 5 jointly perform time difference positioning or phase difference positioning on the test signal to obtain the positioning result 2 of each target signal source.
The distance from the positioning result 2 to the actual coordinates 2 is calculated, the distance is used as a positioning error 2, and the positioning error 2 is used as the positioning errors of the measuring station 1, the measuring station 2 and the measuring station 5. From the above it can be seen that the measuring station 1 corresponds to two positioning errors, different positioning errors corresponding to different target signal sources. Then, when performing step S103 on different target signal sources, different positioning errors may be used: for example, the positioning error 1 is used when evaluating whether the target signal source 1 is in the blind zone, and the positioning error 2 is used when evaluating whether the target signal source 2 is in the blind zone.
S103: determining whether the target signal source is in a blind area according to the positioning error and the signal intensity; if yes, S104 is executed.
The positioning accuracy of the target signal source can be calculated by using a formula, f= -w1 x l+w2 x D, and the target signal source with the positioning accuracy lower than the set value is determined to be in a blind zone, wherein,
f is the positioning accuracy of the target signal source; w1 is the weight corresponding to the positioning error; l is the normalized positioning error; w2 is the weight corresponding to the signal intensity; d is the normalized signal strength.
When the positioning accuracy is larger than the set value, the corresponding target signal source is judged to be out of the blind area, and when the positioning accuracy is smaller than the set threshold value, the corresponding target signal source is judged to be in the blind area.
It should be emphasized that w1+w2 is equal to 1, and the values of w1 and w2 can be set according to actual requirements, for example, in a rural environment with lower building density, the value of w1 can be properly increased, and in an urban environment with higher building density, the value of w2 can be properly increased. If the values of w1 and w2 are not well determined, they can each be taken to be 0.5. In addition, during normalization, an upper error limit may be set for the positioning error, for example, the upper error limit is 100 meters, if the positioning error exceeds 100 meters, the value of L is 1, and if the positioning error is less than 100 meters, the value of L may be set according to the ratio of the positioning error to 100. Similarly, when normalizing the signal strength, a method similar to the normalization of the positioning error can be used for processing.
S104: a wake-up instruction is transmitted to a target standby measurement station capable of detecting the blind zone to cause the target standby measurement station to receive the radio signal.
And screening out the target standby measuring stations from the standby measuring stations, then sending a wake-up instruction to the target standby measuring stations by using the optical fiber communication network, and starting the work of the target standby measuring stations to receive the test signals.
After the target standby measuring station receives the test signal, the measuring station control system starts to execute step S101 again until no blind area exists in the control area corresponding to the measuring station control system.
In practical application, the measuring station control system can randomly select one or more than one standby measuring station as a target standby measuring station in a range of a set radius with the center of the blind area as the center, and then send a wake-up instruction. Further, the standby measuring station may be a fixed measuring station owned by the radio management committee, or a mobile measuring station, or may be a business station owned by a radio fan. It is emphasized that when the amateur station is used as a target stand-by measuring station, the amateur station does not hold data during the use as the target stand-by measuring station to determine information security.
By applying the embodiment of the invention, the test signal source sends the test signal, and the positioning effect of the test signal source is determined according to the test signal, and when the test signal source is positioned at the blind area position with the non-ideal positioning result, the standby measuring station is used for blind compensation operation, so that the blind area is eliminated.
Example 2
Based on embodiment 1 of the present invention, another method for selecting a target signal source according to the actual coordinates is provided.
Fig. 2 is a schematic diagram of a process of selecting a target signal source by a signal measurement station in a radio detection network according to an embodiment of the present invention, and as shown in fig. 2,
a (not shown in the figure): and screening a plurality of signal sources from a signal source set containing all the signal sources to serve as test signal sources. In practical applications, the signal source may include one or a combination of amateur radio stations, mobile phones of authorized users, and mobile phone base stations, and any device with a radio transmitting function may be used as the signal source as long as corresponding control software or hardware terminals are installed. Then, 100 signal sources are selected from all signal sources to be used as test signal sources by adopting a random selection method.
In another embodiment of this step, the control area corresponding to the measurement station control system may be further meshed according to a size of 100m×100m, so as to obtain a plurality of meshes. The projected duty cycle of the buildings in each grid is then calculated for that grid using the three-dimensional city map. Typically, the number of targets of the signal sources in each grid is proportional to the projected duty cycle of the building in the grid. For example, when the projected area of the building in the grid 1 is 10%, the corresponding target number is 4; when the projected area of the building is 50%, the corresponding target number is 8, and the specific proportional relationship can be determined by using a linear function, and the embodiment of the invention is not limited to the specific structure of the linear function. In addition, the control area in the embodiment of the invention is an area in which the unknown signal source is required to be positioned by using the measuring station controlled by the measuring station control system, and the area can be a administrative area or a setting area crossing more than one administrative area.
And finally, taking the set of the target number of signal sources randomly extracted from each grid as a test signal source.
It should be emphasized that the grid size may be larger, such as 200m by 200m,300m by 300m, or 1km by 1km, and how large the specific size may be determined according to practical requirements, for example, smaller grid sizes may be used in areas with higher building densities, larger grid sizes may be used in areas with lower building densities, and even grid sizes of 1km by 1km may be used in rural areas. Because the radiation range of the mobile phone signal is limited, the grid size should be limited by not exceeding the maximum radiation distance of the mobile phone signal; of course, if the source is amateur, a grid size of 50km x 50km may be used.
B (not shown): the electromagnetic properties, the sizes and the heights of all objects in the three-dimensional city map can be measured and calculated in advance, for example, the attenuation coefficients of electromagnetic waves can be tested for one high-rise concrete building of a residential community, and then the attenuation coefficients of all the buildings of the whole community can be obtained; the attenuation coefficient of the electromagnetic wave corresponding to the tree can be obtained by sampling at different places of the city, measuring for multiple times, respectively measuring the attenuation coefficients of a plurality of varieties of trees and trees with different sizes, calculating the average value of the measurement results, and further adopting the test of the attenuation coefficient of a small sample to obtain the attenuation coefficient of the tree of the whole city. Thus, the electromagnetic wave attenuation coefficient of each object in the three-dimensional city map can be obtained, and then the attenuation data of each object can be calculated according to the size of the object.
In this step, as shown in fig. 2, 3 straight propagation paths may be generated from the test signal source a, the test signal source B, and the test signal source C to the measuring station 1, respectively.
Then, dividing each straight propagation path into a plurality of segments at intervals of 10m, wherein the starting point of each straight propagation path is used as a sampling point, and calculating the signal intensity at each sampling point according to the attenuation data of the signals of each object on the propagation path based on a three-dimensional city map, wherein the object comprises: one or a combination of buildings and trees.
C (not shown): in fig. 2, the signal intensities at the sampling points D, E, and F are the same, so that the curve DEF can be obtained as an equal-strength line, and so on, a plurality of equal-strength lines can be obtained, each corresponding to one signal intensity. When the threshold is set to 17dB and the signal strength of the equal-strength line DEF is set to 17dB, the equal-strength line DEF is taken as a target equal-strength line.
In practical application, the shape of the equal-strength lines may be an irregular shape, the number of the equal-strength lines may be more than one, and the equal-strength lines corresponding to different measuring stations may have intersections.
D (not shown): performing symmetrical transformation processing on the target equal-strength line by taking the center point of the target equal-strength line as a symmetrical center to obtain a target line MNP; and then taking all signal sources in the area surrounded by the target line as target signal sources.
Further, the step D may be performed, for example, by dividing the target isopipe into a plurality of sections of curves according to a set length, for example, the isopipe DEF may be divided into a curve DE and a curve EF, and then performing a symmetrical transformation process on the curve DE with a center point of the curve DE as a symmetry center to obtain a transformed curve D 'E'; similarly, a curve E 'F' corresponding to the curve EF can be obtained. And then connecting the curve D 'E' and the curve E 'F' end to end in sequence to obtain the target line.
It should be emphasized that the splitting of the isochrone DEF into the curve DE and the curve EF in the embodiment of the present invention is merely illustrated as an example, and not merely the splitting of the isochrone DEF into the curve DE and the curve EF is meant to represent. In practical application, the equal-strength lines can be segmented according to practical needs, for example, the length of the curve after the equal-strength lines are segmented is preferably 500m-2 km.
In addition, in the embodiment of the invention, the signal intensity calculation in the process of selecting the target signal source is performed by performing simulation calculation on the signal emitted by the simulation signal source in a simulation environment based on the three-dimensional city map, that is, before the target signal source is selected, all the processes are the results of simulation by a computer mathematical model, so that the problem of radio environment confusion caused by the fact that all the signal sources emit signals is avoided, and the simulation algorithm can be used for correcting the signal source in the next iteration of the measuring station control system even if dead zones or inaccurate places exist.
Further, step D may also be performed in the following manner,
fig. 3 is another schematic diagram of a process of selecting a target signal source by a signal measurement station in a radio detection network according to an embodiment of the present invention, as shown in fig. 3, for example, an equal-strength line is split into a plurality of curves, then, for each curve, one curve is taken as a curve XYZ, a fitting circular arc of a point on the curve is obtained, a propagation path GX closest to a midpoint of the equal-strength line is obtained, then, an intersection point T of the propagation path GX and the fitting circular arc is taken as a symmetry center, a center symmetric transformation process is performed on the curve XYZ according to the intersection point T to obtain a transformed curve, and then, the plurality of transformed curves are connected end to obtain a target line.
Further, in order to avoid the technical problem that the pertinence is not strong and the blind area eliminating iteration times are too many caused by the random standby measuring station, in step S104, the embodiment of the invention applies the following method:
and acquiring a third area surrounded by target lines corresponding to each standby measuring station, judging whether the third area comprises a blind area, if so, taking the standby measuring station as a target standby measuring station, and transmitting a wake-up instruction to the target standby measuring station.
Example 3
Example 3 of the present invention adds the following steps on the basis of example 1:
fig. 4 is another schematic diagram of a control method of a signal measurement station in a radio detection network according to an embodiment of the present invention, as shown in fig. 4, a first area O1 surrounded by a target line of a target standby measurement station 1 and a first area O2 surrounded by a target line of a target standby measurement station 2 are obtained, and each measurement station in a working state corresponds to a second area O3;
the measuring stations 3 in operation, which correspond to the second areas O3 all located in any one of the first areas, are converted into standby measuring stations.
In practical application, the number of the target standby measuring stations may be more than one, when the number of the target standby measuring stations is greater than one, the area surrounded by the target lines of each target standby measuring station may be spliced to obtain a first area, then it is determined whether the second area O3 is located in the first area, and if so, the measuring station 3 in a working state corresponding to the second area O3 is converted into the standby measuring station.
By applying the embodiment of the invention, the measuring station in operation can be converted into the standby measuring station, the problem of service life loss of the measuring station caused by the simultaneous operation of too many measuring stations is avoided, the calculation load of a measuring station control system is reduced, and the efficiency is improved.
Example 4
The present invention also provides a signal measurement station control system in a radio detection network, corresponding to any one of embodiments 1 to 3 of the present invention, the system comprising:
the measurement station control system of any one of embodiments 1-3;
a signal source;
a measuring station in an operating state and a standby measuring station.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A method of controlling a signal measuring station in a radio detection network, applied to a measuring station control system, the method comprising:
acquiring actual coordinates of each test signal source, selecting a target signal source according to the actual coordinates, and transmitting a test instruction to the target signal source so that the target signal source transmits a test signal;
each measuring station in a working state receives the test signals, positions each target signal source to obtain a positioning result of the target signal source, determines a positioning error of the target signal source according to a difference value between the positioning result and the actual coordinates, and measures the signal intensity of the target signal source;
determining whether the target signal source is in a blind area according to the positioning error and the signal intensity;
if yes, a wake-up instruction is transmitted to the target standby measuring station capable of detecting the blind area so that the target standby measuring station receives the radio signal.
2. The method of claim 1, wherein the step of obtaining actual coordinates of each of the test signal sources comprises:
and sending a positioning instruction to each test signal source by using the optical fiber communication network so that the test signal source takes the satellite positioning result as an actual coordinate.
3. The method of claim 1, wherein selecting a target signal source based on the actual coordinates comprises:
determining a propagation path of signals of each test signal source to each measuring station according to satellite positioning results of each test signal source and satellite positioning results of the measuring station;
acquiring attenuation data of each object on the propagation path on signals; wherein the object comprises: one or a combination of buildings and trees;
according to the signal intensity of each test signal source and the attenuation data, calculating the final signal intensity of each test signal source reaching the measuring station, and judging whether the final signal intensity is larger than a set threshold value;
if yes, the test signal source is used as a target signal source.
4. The method of claim 1, wherein selecting a target signal source based on the actual coordinates comprises:
screening a plurality of signal sources from a signal source set containing all the signal sources to serve as test signal sources;
setting sampling points on a propagation path of each test signal source reaching the measuring station according to a preset interval, and calculating signal intensity at each sampling point according to attenuation data of signals of each object on the propagation path, wherein the object comprises: one or a combination of buildings and trees;
drawing an equal-strength line according to the signal intensity value at each sampling point; taking the equal-strength line with the corresponding signal strength equal to the set threshold value as a target equal-strength line;
performing symmetrical transformation processing on the target equal-strength line by taking the center point of the target equal-strength line as a symmetrical center to obtain a target line;
and taking all signal sources in the area surrounded by the target line as target signal sources.
5. The method of claim 4, wherein the step of screening a plurality of signal sources from a signal source set including all signal sources as test signal sources comprises:
dividing a control area into a plurality of grids, and determining the target number of signal sources according to the projection duty ratio of buildings in the grids, wherein the control area is an area in which unknown signal sources need to be positioned by using a measuring station;
and taking the set of the target number of signal sources randomly extracted from each grid as a test signal source.
6. The method for controlling a signal measuring station in a radio detection network according to claim 4, wherein the performing symmetric transformation processing on the target equal-strength line with a center point of the target equal-strength line as a symmetric center to obtain a target line comprises:
dividing a target equal-strength line into a plurality of sections of curves according to a set length, and symmetrically transforming the curves by taking the center point of each section of curve as a symmetry center to obtain transformed curve sections;
and connecting the head and tail of each transformed curve segment in sequence to obtain a target line.
7. The method of controlling a signal measuring station in a radio detection network according to claim 6, further comprising:
acquiring a first area surrounded by a target line of a target standby measuring station and a second area corresponding to each measuring station in a working state;
and converting the measuring stations in operation corresponding to the second areas which are all located in the first areas into standby measuring stations.
8. The method for controlling a signal measuring station in a radio detection network according to claim 1, wherein the determining whether the target signal source is in a blind zone according to the positioning error and the signal strength comprises:
calculating the positioning accuracy of the target signal source by using a formula, f= -w1+w2 x D, determining that the target signal source lower than the set value is in a dead zone according to the positioning accuracy, wherein,
f is the positioning accuracy of the target signal source; w1 is the weight corresponding to the positioning error; l is the normalized positioning error; w2 is the weight corresponding to the signal intensity; d is the normalized signal strength.
9. The method for controlling a signal measuring station in a radio detection network according to claim 1, wherein said transmitting a wake-up instruction to a target standby measuring station capable of detecting the dead zone comprises:
and acquiring a third area surrounded by target lines corresponding to each standby measuring station, judging whether the third area comprises a blind area, if so, taking the standby measuring station as a target standby measuring station, and transmitting a wake-up instruction to the target standby measuring station.
10. A system for controlling a signal measuring station in a radio detection network, said system comprising:
the measuring station control system of any of claims 1-9;
a signal source;
a measuring station in an operating state and a standby measuring station.
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