JPS6022749B2 - Radar information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a radar information processing device that can introduce target information from a radar device, particularly radar information such as rain and rain clouds, and automatically select and extract the distribution state of these rain and rain clouds. Regarding.

Conventionally, when determining the distribution state of a specific target from a radar signal, an operator first visually captures the overall distribution state, and then operates the device to select and display only the desired targets. Ta.

In a radar device that displays the distribution state of rain, rain clouds, etc., the distribution state desired to be displayed may differ depending on the observation area, and the distribution state desired to be displayed may differ depending on the weather conditions even in the same observation area. For example, the amount of rainfall in the Kyushu region and the Kanto region is statistically different, so the distribution state that should be displayed is also different, and during typhoons, the distribution with the higher amount of rainfall is often displayed. However, in the follow-up method, it takes time to display a desired distribution state because targets are selected and extracted visually from the overall distribution state.

Furthermore, when displaying the distribution state of targets that change from moment to moment, such as rain or rain clouds, selection and extraction must be performed visually at certain intervals, making the operation complicated and making it impossible to select and display in a timely manner. . Therefore, the present invention has been made in view of the above-mentioned circumstances, and provides a radar information processing device that can automatically select and extract target distribution states by setting information that serves as selection criteria in advance. It provides:

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

That is, in FIG. 1, a target reflected signal from a radar device (not shown) is supplied to a quantizer 1.

The quantizer 1 has a function of quantizing the amplitude information of the target reflected signal, that is, the radar video, for each mesh division, and dividing it into a plurality of amplitude ranks according to the amplitude level. In this case, for example, in the case of a radar PPI display, the mesh refers to a division obtained by dividing into equal angular divisions in the azimuth direction and equal distance division in the distance direction.

Normally, in the case of a rainfall radar, from the viewpoint of data processing, the averaged target reflection information obtained by multiple radar scans is converted into a doji for each mesh.

Therefore, this quantizer 1 can extract information for each mesh that is ranked as a digital amount in stages according to the intensity of the target reflection information, that is, according to the amount of rain or rain clouds.

Now, the amplitude information for each mesh obtained by the quantizer 1, in other words, the rank information, is supplied to the storage device 2 and stored in correspondence with each mesh information.

- On the other hand, in order to select the distribution state of the target reflection information stored in the memory device 2, a count boundary value setter 3 is provided to set a rank as a reference for selection. The set specific rank information is supplied to the counter 4.

As the rank setting value serving as the selection criterion, for example, average rainfall information statistically obtained in the observation area, warning rainfall information, etc. are used, and are set in advance prior to observation.

The counter 4 inputs the information from the memory 2 and counts the number of meshes corresponding to a specific rank from the count boundary value setter 3.

Therefore, as shown in FIG. 2a, for example, if the total number of meshes is set to 12, information including information in four ranks from 1 to 4, which divides the amplitude information, is stored and stored in the storage device 2. Suppose that

Therefore, the amplitude information of rank 3 is set by the count boundary value setting device 3, the number of meshes possessed by rank 3 is counted by the counter 4, and the counted value is supplied to the first comparator 5. In the case of FIG. 2a, there are five ranks 3, so information of five is supplied to the first comparator 5.

Further, the reference number setter 6 similarly determines the distribution state and sets a numerical value that becomes a reference value for selection. This reference value serves as a reference for whether or not to select and display, and is determined according to the observation area and the rank set by the count boundary value setter 3. For example, four numerical values are set in this reference number setting device 6, and are supplied together with the number of meshes counted by the counter 4 to the first comparator 5, where the sizes of the two are compared. In this first comparator 5, only when the number from the counter 4 exceeds the reference number from the reference number setter 6, it is supplied as a cut-off signal to the next gate circuit 7. In the example shown in Figure 2,
Since the number from the counter 4 is 5 and the reference number from the reference number setter 6 is 4, a switching signal is derived from the first comparator 5.

The gate circuit 7 receives the signal from the first comparator 5, and supplies the signal from the rank setter 8 which has set a predetermined amplitude rank, for example, rainfall rank 2, to the second comparator 9. The device 9 reads mesh information of rank 2 or higher. Therefore, as shown in FIG. 2b, the second comparator 9 outputs information in a form in which the distribution state of the target is selected in a timely manner according to the setting conditions from among the radar information shown in FIG. 2a. Only those with a rank of 2 or higher are automatically extracted.

As a result, for example, if the number of meshes for a specific amount of rainfall exceeds a predetermined value, it is possible to automatically select and extract only the information of meshes with a set rank or higher, and in other cases, for example, You can display information for all meshes.

Therefore, the conventional visual selection operation is no longer necessary. In this way, when target information is distributed over a wide area such as rain or rain clouds, it is necessary to selectively extract the distribution state in order to accurately grasp the distribution state of the target. Like a device, by quantizing and ranking each mesh and counting the number of meshes corresponding to a specific rank, it automatically and selectively extracts meshes, and has great practical effects.

In the above embodiment, the value set by the count boundary value setter 3 is exemplarily 3, but one value is shown, but it is of course possible to set a large number of values so that an arbitrary value can be selected and set. , or the total number of higher ranks including the set value may be used as the set value.

Similarly, although the reference number setter 6 also sets the number to 4, it is needless to say that the number is not limited to this.

Furthermore, the value set by the rank setting device 8 may be arbitrarily selected.

In this way, the device of the present invention can automatically select and extract the distribution state of radar target information in a timely manner by setting the count boundary value setter 3, reference number setter 6, rank setter 8, etc. in advance. It is possible to do so.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a radar information processing apparatus according to the present invention, and FIG. 2 is an operation explanatory diagram illustrating the operation of the apparatus shown in FIG. 1: quantizer, 2: memory, 4: counter, 5: first comparator, 8: rank setter, 9: second comparator. Multi' figure a Z nail

Claims (1)

[Claims] 1. A quantizer that quantizes the amplitude information of the target reflected signal from the radar device for each mesh division and divides it into multiple ranks according to the amplitude level, and a quantizer that quantizes the amplitude information of each mesh that has been quantized by this quantizer. a memory device that stores information corresponding to each mesh; a counter that counts the number of meshes that have information corresponding to at least one pre-specified rank among the amplitude information stored in the memory device; a selection circuit that retrieves amplitude information of meshes of a preset rank or higher from the memory when the counting output of the counter exceeds a preset reference setting value; Device.