JP3093537B2 - Radar data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar data processing apparatus for distributing rainfall data observed by a radar rain gauge to a treatment zone such as a sewerage pumping station or a sewage treatment plant in each region.

[0002]

2. Description of the Related Art Conventionally, rainfall data observed by a radar rain gauge has been distributed to sewage pumping stations, sewage treatment plants, etc. for rainfall prediction, runoff analysis, pump control, and the like. As one, a radar data processing device is known.

FIG. 5 shows a configuration example of a conventional radar data processing apparatus. This radar data processing device transmits the reflected radio field intensity data observed by the radar rain gauge 1 to the radar central computer 2 managing the radar rain gauge 1. In the radar central computer 2, the data converter 3 converts the reflected radio wave intensity data into rainfall intensity data based on the radar equation represented by the equation (1).

[0004]

(Equation 1)

The rainfall intensity data converted by the data conversion device 3 is expressed in polar coordinates. This polar coordinate data is converted into orthogonal coordinate data by the polar-to-linear converter 4. Then, the rainfall intensity data converted into the rectangular coordinates is input to the data correction device 5. The data correction device 5 is provided with ground rainfall values from calibration ground rain gauges installed at various locations. The rainfall intensity data calibrated by the data correction device 5 using the ground rainfall values is added to the data compression device after the data observed by each of the calibration ground rain gauges is added to the end of the data by the data addition device 6. Passed to 7. The data compression device 7 compresses the rainfall intensity data, and distributes the compressed data to the computers 10-1 and 10-2 of each processing section such as a processing plant by the distribution device 8.

[0006] In the computer 10-1 in the processing zone, the distribution device 8
The decompressed data distributed by the data decompression device 11 is decompressed by the data decompression device 11 and then given to a predetermined processing device 12 for processing such as display and outflow analysis.

[0007]

As described above, the conventional radar data processing device distributes the rainfall intensity data of all areas observed by the radar rain gauge 1 to the computers of all processing areas. Even if the distribution data is compressed, the amount of data becomes enormous and it takes a long time to distribute the data, and there is a problem that a large time delay occurs between the measurement by the radar rain gauge 1 and the distribution to each processing plant.

In the conventional radar data processing apparatus, the rainfall intensity data is calibrated by the ground rainfall value obtained by the calibration ground rain gauge. Since the gauges are not always installed evenly, there is a problem that the accuracy of the rainfall intensity data of the treatment zone included in the area where the ground rain gauge for calibration is not installed is reduced.

The present invention has been made in view of the above circumstances, and provides a radar data processing apparatus capable of reducing the amount of data to be distributed from the radar central computer to each processing section and shortening the distribution time. The purpose is to:

Further, the present invention shortens the distribution time of measurement data and reduces the accuracy of rainfall intensity data even in a processing section in which a ground rain gauge for calibration is not installed. An object of the present invention is to provide a radar data processing device capable of grasping.

[0011]

In order to achieve the above object, the present invention takes the following measures. A radar data processing apparatus according to claim 1, which distributes rainfall data observed by a radar rainfall gauge to a computer in each processing zone, wherein the whole area becomes an observation target when rainfall data is received from the radar rainfall gauge. Data extraction means for extracting only data of a predetermined region from rainfall data of
A data compression unit for compressing the data of the specific area extracted by the data extraction unit; a distribution unit for distributing each compressed data compressed by the data compression unit to a computer in a corresponding processing section; And a data conversion means for converting the data restored by the decompression means in the computer in the processing section.

A radar data processing apparatus according to a second aspect of the present invention, in addition to the configuration of the first aspect, acquires a surface rainfall value from a ground rainfall observation device of a corresponding processing section provided in a computer of each processing section. A configuration is provided that includes correction means for correcting the data converted by the data conversion means with the above-mentioned rainfall value.

[0013]

According to the present invention, the following actions can be obtained by taking the above measures. In the radar data processing device according to the first aspect, observation data obtained by the radar rain gauge is provided to the data extracting means, and only data of a pre-designated area is selected from all observation data for each processing zone. Is extracted. The measurement data extracted by the data extraction unit is compressed by the data compression unit, and then distributed by the distribution unit to the computer in the corresponding processing section. Therefore, the amount of data to be distributed is greatly reduced as compared with the case where observation data in all regions is distributed to computers in all processing zones. In the computer of each processing section, the observation data is restored by the restoration means, and thereafter, predetermined data conversion is performed by the data conversion means.

[0014] In the radar data processing apparatus according to the second aspect, in the computer of each processing zone, the ground rainfall value is taken into the correction means from the ground rain gauge of the processing zone, and converted into predetermined data by the data processing means. The observation data is corrected. That is, the observation data is corrected without using the data observed by the ground rain gauge installed for calibration.

[0015]

Embodiments of the present invention will be described below. FIG. 1 shows the overall configuration of a radar data processing apparatus according to one embodiment of the present invention. The radar data processing apparatus according to the present embodiment inputs reflected radio field intensity data observed by the radar rain gauge 1 to the radar central computer 20, performs processing for data distribution there, and then transmits the data to each processing section via the distribution apparatus 21. Are transmitted to the computers 22-1 and 22-2, and are converted into rainfall intensity data by the computers 22-1 and 22-2 in each processing section, and then processed in accordance with each purpose of use.

The radar rain gauge 1 is a type of weather radar, which emits a radio wave from its own radar and measures the intensity of a reflected radio wave which is reflected by the raindrop. The reflected radio wave intensity data transmitted from the radar rain gauge 1 is in a state of polar coordinate data as shown in FIG. The radar central computer 20 input to the radar central computer 20 in this data form includes a data extracting device 23 for extracting data of an arbitrary area from the reflected radio field intensity data, and a data extracting device 23.
Compression device 2 for compressing the data extracted in step 2 for distribution
4 is provided.

The data extracting device 23 executes a data extracting process based on the flowchart shown in FIG. 2 and stores information on each processing section to which observation data is to be distributed in a memory configuration as shown in FIG. And an observation data storage unit for storing reflected radio field intensity data observed by the radar rain gauge 1.

As shown in FIG. 3, the processing zone registration memory stores
Identification information for determining which of the registered processing areas is the processing area, required area information specifying the area from which data is to be extracted, and address information of all meshes included in the required area on the observation data storage unit And a filter number for extracting only data of an area corresponding to the requested area. The data extraction area is specified by the required area of the processing area registration memory.

The data compression device 24 is a data extraction device 2
The data extracted in step 3 is subjected to data compression based on a predetermined compression method for each processing section to be distributed. The processing section computer 22-1 includes a data decompression device 25 for decompressing compressed data, a data conversion device 26 for performing data conversion based on the radar equation, a polar direct conversion device 27 for performing conversion from polar coordinates to rectangular coordinates, It is composed of a data correction device 28 for performing data correction, a ground rainfall observation device 29 in the processing zone, and various processing units 30 for performing processing according to the purpose of use.

Next, the operation of the embodiment constructed as described above will be described. The radar rain gauge 1 emits a radio wave from the own radar into the air, specifies the position from the time until the radio wave hits the raindrop and returns to the radar again, and specifies the rainfall intensity from the reflection intensity. As a result, reflected radio field intensity data displayed in polar coordinates as shown in FIG. 4 can be obtained by one measurement (360 degrees). In addition, 1 shown in FIG.
The mesh is an observation unit of the radar rain gauge 1, and its size is determined according to the resolution in the distance direction and the azimuth direction. Observation data (reflected radio field intensity data) acquired by the radar rain gauge 1 by such observation is used as a data extraction device 2
3 in the observation data storage unit.

On the other hand, in the processing section registration memory of the data extraction device 23, a plurality of processing sections in which observation data of the radar rain gauge 1 needs to be distributed from the radar central computer 20 are registered in advance.

The processing executing section of the data extracting device 23 executes the processing shown in FIG. 2 every time observation data is stored in the observation data storage section. That is, the required area of the processing area registered at the top of the processing area registration memory is determined, and when the necessary area is small, the observation data storage unit is accessed in mesh units using the mesh address, and the extraction request is issued. The observation data of all meshes in a certain area is extracted as the observation data of the required area. If the necessary area extends over a wide area, extraction is performed using a filter. For example,
A filter is created in which the filter coefficient of the area corresponding to the required area is “1” and the filter coefficients of the other areas are “0”. Then, only the observation data in the required area can be extracted by performing arithmetic processing (multiplication) on the observation data in all the regions by this filter. Such a filter is created and stored in advance for a processing zone requiring observation data in a wide area. Then, the corresponding filter is read out from the filter number and used.

By such data extraction processing, for example, for a certain processing section, only the data above the processing section can be extracted. When the processing of the processing section registered at the top of the processing section registration memory is completed as described above, the extraction work is performed on the processing section registered second. Hereinafter, similar data extraction processing is executed until all registration processing sections are completed.

The observation data extracted in this manner is compressed by the data compression device 24 for each processing section. The compressed data is distributed by the distribution device 21 to the computers 22 of the respective processing sections.

The computers 22 in each processing section decompress the compressed data sent from the radar central computer 20 by the data decompression device 25. The restored data is stored in the data converter 2
In step 6, the reflected radio wave intensity is converted into the rainfall intensity by the radar equation. The rainfall intensity data converted by the data conversion device 26 is further converted to orthogonal coordinates by the polar direct conversion device 27.

Then, the data correction device 28 performs correction for bringing the rainfall intensity data closer to the true value. The data correction device 28 calculates a correction coefficient from the surface rainfall value and the rainfall intensity data observed by the surface rainfall observation device 29 installed in the processing zone, and corrects the rainfall intensity data with the calculated correction coefficient. . The corrected rainfall intensity data is sent to the processing unit 30 and processed according to the purpose of use. For example, it is processed in accordance with processes such as rainfall prediction, runoff analysis, and pump control.

As described above, according to the present embodiment, the data extraction device 23 extracts only necessary data for each processing section and distributes the data to each processing section. Since the time can be significantly reduced and the distribution time can be shortened, a time delay of the distribution can be avoided.

According to the present embodiment, the ground rainfall observation device 29 installed in the processing zone in the computer of each processing zone.
Since the rainfall intensity data is calibrated by using the data of (1), more accurate rainfall intensity can be obtained, and there is an advantage that the user can grasp an accurate rainfall situation.

In the above embodiment, the processing area registration memory is used to arbitrarily specify the data extraction area. However, the extraction area may be specified by another method. The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0030]

As described above in detail, according to the present invention, the radar data which can reduce the amount of data to be distributed from the radar central computer to each processing section, shorten the distribution time, and avoid the time delay of the distribution. A processing device can be provided.

Further, according to the present invention, the distribution time of the measurement data is shortened, and the data of the ground rainfall observation device of each processing section is obtained even in the processing section in which the ground rain gauge for calibration is not installed. By using the radar data processing apparatus, it is possible to provide a radar data processing device capable of grasping an accurate rainfall state without a decrease in accuracy of the rainfall intensity data.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a radar data processing device according to one embodiment of the present invention.

FIG. 2 is a flowchart for data extraction processing in the radar data processing device shown in FIG.

FIG. 3 is a configuration diagram of a processing section registration memory of the radar data processing device shown in FIG. 1;

FIG. 4 is a diagram illustrating a data example of reflected radio field intensity data represented by polar coordinates.

FIG. 5 is a configuration diagram of a conventional radar data processing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Radar rain gauge, 20 ... Radar central computer, 21 ... Distribution apparatus, 22 ... Processing section computer, 23 ... Data extraction apparatus, 24 ... Data compression apparatus, 25 ... Data decompression apparatus, 2
6: Data converter, 27: Polar converter, 28: Data corrector, 29: Surface rainfall observation device.

Continued on the front page (72) Inventor Tetsuya Shinohara 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Inventor Masashiro Nakata 1-1-1, Shibaura, Minato-ku, Tokyo Stock Company (56) References JP-A-2-25779 (JP, A) JP-A-62-197778 (JP, A) JP-A-2-38888 (JP, A) JP-A-54-101696 (JP) JP, A) JP-A-58-214860 (JP, A) JP-A-4-235378 (JP, A) JP-A-5-87905 (JP, A) JP-A-4-42086 (JP, A) 60-607781 (JP, U) Toshiba Review Vol. 47, No. 5, May 1, 1992, p. 382-386 (58) Fields investigated (Int. Cl. ⁷ , DB name) G01S 13/95 G01W 1/00 G01W 1/02

Claims (2)

(57) [Claims] 1. A radar data processing device for distributing rainfall data observed by a radar rainfall gauge to a computer in each processing zone, comprising: receiving rainfall data from the radar rainfall gauge; Data extraction means for extracting only data of a predetermined area from among them, data compression means for compressing data of a specific area extracted by the data extraction means, and each compressed data compressed by the data compression means respectively Distribution means for distributing the compressed data sent from the distribution means in a computer in the processing section, and data conversion in the computer in the processing section for the data restored in the decompression means. A radar data processing device comprising: a data conversion unit. 2. A computer provided in each of the processing zones, comprising a ground rainfall value acquired from the ground rainfall observation device of the processing zone, and a correction means for correcting data converted by the data conversion means with the ground rainfall value. The radar data processing device according to claim 1, wherein: