JP3841489B2 - Microwave circuit route display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microwave line route display device that is installed in a mobile relay transmission system such as a television broadcast and displays a line route between a mobile relay point and another relay point.
[0002]
[Prior art]
In a mobile relay transmission system for television broadcasting, FPU (Field Pick Up) receiving base stations are installed at some notable high places, and the FPU receiving base and the broadcasting station are connected by a dedicated line. Then, the mobile relay station dispatched for coverage and the nearest FPU receiving base station are connected by a micro line, and the TV coverage screen is sent to the FPU receiving base station via this micro line. A method of transferring from a station to a broadcasting station is adopted.
[0003]
The FPU receiving base station and the mobile relay vehicle are established with a micro link. The FPU receiving base station is generally operated unattended, and preset direction adjustment for directing its antenna toward the mobile relay vehicle is a broadcasting station. This is done via a dedicated line from a remote monitoring control device installed on the side.
[0004]
However, since the calculation of the angle for adjusting the preset direction is performed manually with reference to the map, the angle between the FPU receiving base station and the point where the mobile relay vehicle is located is accurately calculated based on the map. Work takes time.
[0005]
Further, the presence or absence of a micro-line prospect between the FPU receiving base station and the planned relay point is unknown in the remote monitoring and control device, and can be understood only when the mobile relay vehicle arrives at the site. When you arrive at the site and find that there is no line of sight, you need to change the mobile relay point to ensure the line of sight. In that case, adjust the preset direction of the FPU receiving base station. It was necessary to start over, and it took time and there was a risk of losing the relay timing.
[0006]
Therefore, a technique for solving this problem is disclosed in Japanese Patent Publication No. 7-97759. The far-field monitoring and control device of the FPU receiving base station detects a map plane display unit, a position designation unit that designates an arbitrary location on the map plane as a desired relay point, and a position of the designated relay point. And a position detection unit that generates position information and a calculation unit that calculates the azimuth and distance of the relay point based on the position information. Further, the elevation / elevation angle calculation unit that calculates the elevation angle to the relay point based on the calculated azimuth angle and distance, and the elevation / elevation angle / elevation data for each distance and azimuth angle stored in the elevation / elevation angle calculation unit are stored. A corner / altitude data file is provided.
[0007]
As a result, the azimuth angle and elevation angle from the FPU receiving base station can be calculated immediately for any relay candidate point on the map currently displayed on the map surface display unit, and the micro route can be determined immediately even at the first mobile relay point. It is possible.
[0008]
The far-field monitoring control device of the FPU receiving base station further includes a terrain undulation pattern generation unit that generates a terrain undulation pattern from the altitude of the terrain on the micro link to the relay point, and the generated terrain undulation pattern and micro A micro route prospect determination display unit for displaying a relationship with the route.
[0009]
Thereby, the remote monitoring control device can determine whether or not the micro route to be set is visible, and can determine the relay microphone and route without waiting for the arrival of the mobile relay vehicle.
[0010]
[Problems to be solved by the invention]
However, in the case of the above remote monitoring control device, if there is no prospect between the FPU receiving base station and the relay scheduled point once set, an arbitrary location on the map surface is newly designated as a relay point by the remote monitoring control device. However, it is necessary to check whether or not the position is in the line of sight, and the position designation is repeated until the line of sight is established.
[0011]
In addition, this device is provided on the broadcasting station side for controlling the antenna direction of the FPU receiving base station, and which FPU receiving base station is actually used from the mobile relay point side in the field. In addition, it is better to be able to immediately determine whether or not the setting of the micro circuit route for the FPU receiving base station can be performed.
[0012]
SUMMARY OF THE INVENTION An object of the present invention is to provide a microwave circuit route display device that can determine whether or not a micro circuit route between two points has been established, and displays a countermeasure when there is no line of sight.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following means.
The invention according to claim 1 is a circuit route display device for displaying a circuit route by microwave between an FPU receiving base station and a mobile relay point, wherein the circuit route display device displays a map within a predetermined range. A display unit, a position setting unit for setting two arbitrary points on the map displayed in the map display unit, an altitude data file storing altitude information , and the two points set by the position setting unit Based on the terrain profile line, the terrain line generation unit that generates the terrain profile line based on the altitude data of the altitude data file, the setting line line generation unit that generates the setting line line connecting the two points, and Line-of-sight line generation that calculates the required altitude at the two points so that the line-of-sight between the two points is established, and generates a line-of-sight line including the necessary altitude And a line display unit for displaying the terrain profile line, the setting line line, and the line-of-sight line, and displaying the map display unit, the position setting unit, the line display unit, and the required altitude on the same screen. It is characterized by being displayed on .
[0014]
Since it is configured in this manner, first, the map displayed on the map display unit is viewed, and two arbitrary points are set by the position setting unit. Usually, one is the FPU receiving base station and the other is the location of the mobile relay vehicle. Since the position of the FPU receiving base station is determined in advance, the position is specified, and the position of the mobile relay vehicle is determined and set on a map or the like. Then, based on the data of the file in which the altitude data is stored, the terrain line generation unit generates a terrain profile line between two points and displays it on the line display unit.
[0015]
In addition, a setting line line between two points is generated by the line line generation unit, and is displayed together with the terrain profile line on the line display unit on which the terrain profile line is displayed. In addition, the line-of-sight line generation unit generates a line-of-sight line with a clear line of sight between two points, and similarly displays it on the line display unit. By looking at this line-of-sight line, it is found out what measures should be taken on the mobile relay vehicle side when there is a part that becomes an obstacle to natural objects in the line of sight between the two points.
[0016]
According to a second aspect of the present invention, in the microwave line route display device according to the first aspect, the line-of-sight line has a maximum altitude of 20 m in the tree between the two points, and is added accordingly. It is characterized by calculating and setting.
Further, the invention according to claim 3 is the microwave circuit route display device according to claim 1, in which one of the two points is used at one receiving side, the used frequency to be input, the transmission output, the antenna gain and the supply. The expected input electric field strength is calculated from the line loss and displayed on the same screen as the required altitude.
[0017]
Further, according to the invention of claim 2, the line-of-sight line only raises the antenna at the same point by calculating the height of the tree between the two points as a maximum of 20 m, and adding that amount, The line line can be viewed.
According to a third aspect of the present invention, an expected input electric field strength is calculated from an input use frequency, a transmission output, an antenna gain and a supply line loss at one of the two points, and the required altitude and Since they can be displayed on the same screen, the validity of the reception level at the reception point can be determined, and an appropriate transmission / reception point can be set. In addition, with this configuration, by inputting data such as transmission output on the transmission side, the expected input electric field strength on the reception side is displayed, and the validity of the reception level at the reception point can be determined. Appropriate transmission / reception points can be set .
[0018]
In the present invention, when one of the two points moves, the setting of the point is performed in real time, and accordingly, the information display of the map display unit and the line display unit is also performed in real time. If this is done, it is possible to determine the presence or absence of a line-of-sight line from the current point to another point while moving, and to quickly set a line route .
[0019]
In the present invention, if at least one of the two points is obtained from the GPS receiver data, at least one of the two points within the predetermined range is set. If it moves, since the position of the point is received from the data from the GPS receiver using the GPS satellite, the position can be easily set in real time .
[0020]
In the present invention, when the line-of-sight line is displayed, altitude information required at two points when the line-of-sight line is formed is displayed. With this configuration, when there is no line of sight on the set line at the two points, it can be understood which of the altitudes at which the line can be viewed. For example, if the required altitude falls within the range of the rise of the antenna of the relay base station, the line can be seen by raising the antenna, and it is not necessary to move, so that a quick response can be made .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of a microwave circuit route display device according to the present invention.
[0025]
As shown in the figure, the microwave line route display device 1 is basically configured as a personal computer 2, and includes a terrain line generation unit 3, a setting line line generation unit 4, a line-of-sight line generation unit 5 and the like. Is stored. In addition, a map data file 6 that converts a map of a range in which a microwave line route is set to data and an altitude data file 7 that also converts the altitude of a map in a predetermined range to data are also stored.
[0026]
The microwave line route display device 1 includes a keyboard 8 and a mouse 9, a map display unit 10, a line display unit 11, and a display 12 for displaying other information. Is configured to connect.
[0027]
Normally, the terrain line generation unit 3, the setting line line generation unit 4, the line-of-sight line generation unit 5 and the like are stored in the hard disk HDD as application software, and the map data file 6 and the altitude data file 7 are stored in advance in the hard disk HDD. Or may be read from the CD-ROM drive each time. Further, instead of the map data file 6, a map may be read from the scanner 13 and converted into map data by the data conversion unit 14.
[0028]
In the method of using the apparatus 1, first, a map including a range in which a microwave line route is to be set is displayed on the map display unit 10. This is done by operating the keyboard 8 or the mouse 9 to display a map of a desired range from the map data file 6 on the map display unit 10 or reading a map of the desired range with the scanner 14 to display the map display unit 10. To display. The map displayed on the map display unit 10 can be enlarged / reduced and scrolled. Alternatively, the wide area may be read by the scanner 13 and the enlarged portion may be read from the map data file 6. The map display unit 10 is specifically displayed on the left side of the display 12 shown in FIG.
[0029]
Next, two points (points A and B) where the microwave line route is to be set are input by operating the keyboard 8 or the mouse 9. When inputting from the keyboard 8, the longitude and latitude of the point are input numerically, and in the case of a mouse, the point is clicked. Usually, one of the two points is the FPU receiving base station and the other is the position of the mobile relay car. Even if there are a plurality of FPU receiving base stations, their positions are already determined, and the position of the FPU receiving base station to be used is input or registered in advance, and the display is clicked with the mouse.
[0030]
Actually, as shown in FIG. 2, when the transmission / reception point selection button displayed on the right side of the display 12 is clicked, this button is displayed in red, and the reception side input mode is entered. If the registration button at the bottom is clicked, the FPU receiving base station to be used is determined.
[0031]
On the other hand, the mobile relay side determines the position on the map and inputs it. In practice, as shown in FIG. 2, when the transmission / reception point selection button displayed on the upper right side of the display 12 is clicked, this button is displayed in blue, and the transmission side input mode is set, and the map screen is displayed. It is registered by clicking any desired point with the mouse. It may be used for registration from the place name. When two points are set, as shown in FIG. 2, the two points are displayed on the map displayed on the map display unit 10, and a line is drawn between them.
[0032]
When the two points are set, the terrain line generation unit 3 generates a terrain profile line between the two points based on the data of the altitude data file in which the altitude data is stored. As shown in FIG. 12 is displayed on the left side line display section 11. The altitude data stored in the altitude data file is 50m mesh data issued by the Geographical Survey Institute.
[0033]
When two points are set, a setting line line between the two points is generated by the setting line line generation unit 4, and is displayed together with the terrain profile line on the line display unit 11 on which the terrain profile line is displayed. . Furthermore, the line-of-sight line generation unit 5 generates a line-of-sight line with a clear line of sight between the two points, and displays it on the line display unit 11 in the same manner.
[0034]
On the right side of the line display unit 11, the distance between the two set points is displayed in km units, and when there is a C point that obstructs the line of sight between the two points, this point c is cleared. The line-of-sight altitude required by point A or point B is displayed in m units.
[0035]
For example, it displays how many meters the antenna at point A or point B is raised to enable the line of sight to be visible. As a result, it is usually found out what measures should be taken on the mobile relay vehicle side. In other words, if the required altitude is within the range of ascent of the relay vehicle antenna, the line can be seen by raising the antenna, and it is not necessary to move. The distance between the two points and the required visibility altitude are calculated based on the position between the two points, the elevation angle, etc., but the altitude required on the mobile relay vehicle side is the maximum altitude of the trees between the two points up to 20m. And add the amount to calculate.
[0036]
Furthermore, on the right side of the line display unit 11, the operating frequency GHz, the transmission output Pt (dBm), the transmission antenna gain Gt (dBi), the reception antenna gain Gr (dBi), the transmission feeder loss Lft (dB), the reception power supply There is a part for inputting the electric wire loss Lfr (dB), and a mouse pointer is put on the part and a numerical value is input from the keyboard, or one previously entered as data is selected. When a numerical value is input, the expected input electric field strength Pr (−dBm) on the receiving side is displayed, and it is determined whether or not good communication is possible.
[0037]
In this case, the expected input electric field strength Pr on the receiving side is
Pr = Pt−Lft + Gt−Γ + Gr−Lfr (1)
Is calculated from
Γ in equation (1) represents free space loss,
Γ (dB) = 122 + 20 log ₁₀ D (km) −20 log ₁₀ λ (cm)... (2)
Calculated by Here, D is a transmission distance, and λ is a wavelength.
[0038]
In addition, although the map display part 10 and the line display part 11 are represented separately in FIG. 2 and FIG. 3, it is obvious that they can be displayed side by side on the same display surface.
[0039]
Next, another embodiment of the present invention will be described. FIG. 4 is a block diagram showing a microwave line route display device 1 according to another embodiment. When a mobile relay vehicle or the like is used as one of two points set for establishing a microwave circuit route, it is difficult to accurately indicate the current position of the mobile relay vehicle on a map. Therefore, as shown in the figure, a GPS (Global Positioning System) receiver 15 is used to receive a radio wave from a navigation satellite via the GPS antenna 16 to obtain the latitude and longitude of the current position, and the numerical value is obtained from the microwave. The line route display device 1 may be input with the keyboard 8, or the GPS receiver 15 may be connected to the device 1 via the interface and the latitude and longitude of the current position may be input in real time. .
[0040]
By inputting the position of the mobile relay vehicle in real time, it is possible to determine whether or not there is a prospect of the line route between the current point and the FPU base station to be relayed, and to quickly set the line route Will be able to.
[0041]
Note that in order to establish a microwave circuit route between the FPU base station and the mobile relay vehicle, a sharp directivity is required between the antennas. In determining the azimuth angle and the elevation angle, the technique described in Japanese Patent Publication No. 7-97759 described above may be used, or a satellite such as a navigation system, a satellite supplement system, a microwave antenna control system, or the like may be used. You may calculate on the basis of the position of.
[0042]
Alternatively, it may be calculated by a method already proposed by the present applicant in Japanese Patent Application No. 7-135330. In this method, first, the azimuth angle is obtained by detecting the latitude and longitude of two antennas that receive radio waves from a navigation satellite and direct each other, and the detected latitude and longitude of both antennas and the radius of curvature on the ground surface. The distance between the two antennas is calculated based on the distance between the two antennas, and the distance between the rectangular sides on the ground surface surrounded by the latitude and longitude lines at the positions of the two antennas is calculated as And calculate the interior angle of the rectangle based on the calculated sides of the rectangle and the distance between the two points, and calculate the azimuth angle of both antennas that are directed toward each other based on the calculated interior angle of the rectangle It is what I did.
[0043]
In addition, the elevation angle is calculated based on the radio wave received from the navigation satellite, detecting the altitude from the ground surface of the two antennas that are directed toward each other, and based on the altitude difference between the two antennas and the distance between the two antennas. The angle of elevation when the antenna is directed to the other antenna is calculated on the basis of the altitude of the antenna.
[0044]
According to this method, the azimuth angle and elevation angle of the antenna can be calculated with high accuracy, and real-time display is possible by using the antenna for the microwave circuit route display device 1.
[0045]
【The invention's effect】
As described above, according to the invention of claim 1, the set terrain profile line between the two points is displayed on the line display section, and the set line line between the two points is displayed together with the terrain profile line, Furthermore, a line-of-sight line with a clear line of sight between the two points is generated and displayed. By looking at this line-of-sight line, if there is an obstacle in the line of sight between two points, it will be clear what measures should be taken on the mobile relay vehicle side, so it is possible to quickly set the line route It becomes.
[0046]
Further, when one point of the two points are moved, the setting of the location is performed in real time, the accompanying information display of the map display unit and the line display unit which is also to be done in real time, while moving The presence or absence of a line-of-sight line from the current point to another point that relays can be immediately determined, and a line route can be quickly set.
[0047]
Also, of the two points to be set, at least one of the settings can be set result to be performed to obtain from the data of the GPS receiver, easily its position in real time.
[0048]
Further, when displaying the sight line line, Then, as to display the altitude information required by two points at the time of forming the sight line line, at that point, taking either a high degree how much, the line line You can see if the prospect is possible and can respond quickly.
[0049]
Further, according to the invention of claim 2, prospects line line, a high degree of trees between two points as the highest 20 m, can be easily line route setting by setting calculated by adding the minute.
According to the third aspect of the present invention, the predicted input electric field strength is calculated from the input operating frequency, transmission output, antenna gain and supply line loss on one of the two points, and the same screen as the required altitude. Therefore, it is possible to determine the validity of the reception level at the reception point and to set an appropriate transmission / reception point. Also, by inputting data such as transmission output on the transmission side, the expected input electric field strength on the reception side is displayed, the validity of the reception level at the reception point can be judged, and appropriate transmission / reception point setting Can be done.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of a microwave circuit route display device according to the present invention.
FIG. 2 shows a map display unit or the like on the display of the microwave line route display device.
FIG. 3 shows a line display unit and the like on the display of the microwave line route display device.
FIG. 4 is a block diagram of another embodiment of a microwave circuit route display device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Microwave circuit route display apparatus 2 Personal computer 3 Terrain line generation part 4 Setting line line generation part 5 Line-of-sight line generation part 6 Map data file 6
7 Altitude data file 8 Keyboard 9 Mouse 10 Map display unit 11 Line display unit 12 Display 13 Scanner 14 Data conversion unit 15 GPS receiver 16 GPS antenna

Claims (3)

In the circuit route display device for displaying the circuit route by microwave between the FPU receiving base station and the mobile relay point,
The line route display device displays a map within a predetermined range; and
A position setting unit for setting two arbitrary points on the map displayed in the map display unit;
An altitude data file containing altitude information,
A terrain line generation unit that generates a terrain profile line between two points set by the position setting unit based on the altitude data of the altitude data file ;
A setting line generation unit that generates a setting line connecting between the two points;
A line-of-sight line generation unit that calculates a necessary altitude at the two points so that a line-of-sight between the two points stands based on the topographic profile line, and generates a line-of-sight line including the necessary altitude ,
The terrain profile line, the setting circuit line, and a line display unit for displaying the sight line line,
A microwave circuit route display device that displays the map display unit, the position setting unit, the line display unit, and the required altitude on the same screen . 2. The microwave line route display device according to claim 1 , wherein the line-of-sight line is calculated and set by setting the altitude of a tree between the two points to a maximum of 20 m and adding the corresponding amount . The predicted input electric field strength is calculated from the input use frequency, transmission output, antenna gain and supply line loss on one of the two points, and displayed on the same screen as the required altitude. Item 2. A microwave circuit route display device according to Item 1 .

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