WO2021005634A1 - Turbulence detection device and turbulence detection method - Google Patents

Abstract

This invention comprises: a moment calculation unit (101) for using a reception signal based on waves that have been emitted into an observation area and reflected by the atmosphere in the observation area to calculate the Doppler velocity for each range cell obtained by dividing the observation area in a range direction and azimuth direction, a wind-direction-and-wind-speed estimation unit (102) for estimating a wind direction value and wind speed value for each range cell on the basis of the Doppler velocities calculated by the moment calculation unit (101), and a blast detection unit (105) for detecting a blast area in the observation area on the basis of the wind direction values and wind speed values estimated by the wind-direction-and-wind-speed estimation unit (102) for each range cell.

Description

Eddy detection device and eddy detection method

The present invention relates to an eddy detection device and a eddy detection method for detecting the range of influence of engine exhaust gas injected from a jet engine mounted on an aircraft.

When an aircraft takes off and landing on the ground surface (hereinafter referred to as the "airport surface") in the airport, the effects of wake turbulence generated by the flight of other aircraft and the jet engine mounted on the other aircraft It is also necessary to avoid the influence of the injected engine exhaust. Engine exhaust is also referred to as jet blast, engine blast, jet jet, or the like. Hereinafter, engine exhaust, jet blast, engine blast, jet jet, and the like are referred to as "blast".
As a technique for detecting the range of influence of blast (hereinafter referred to as "blast area"), for example, Patent Document 1 describes an airport surface guidance support system that calculates a blast area based on aircraft position, movement information, or aircraft information. Is disclosed.

JP-A-2015-228101

The behavior of the blast changes depending on the wind around the aircraft (hereinafter referred to as "background wind"). That is, the injection direction or speed of the blast changes depending on the background wind of the aircraft.
In the conventional technique for detecting the blast region represented by the technique disclosed in Patent Document 1, there is a problem that the influence of the background wind is not taken into consideration and the actual blast region may not be detected. ..

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an eddy detection device that detects a blast region in consideration of a background wind.

The turbulence detection device according to the present invention is a doppler for each range cell divided into the range direction and the azimuth direction of the observation area based on the received signal based on the wave motion radiated to the observation area and reflected in the atmosphere of the observation area. A moment calculation unit that calculates the velocity, a wind direction wind speed estimation unit that estimates the wind direction value and wind speed value for each range cell based on the Doppler velocity calculated by the moment calculation unit, and a wind direction value for each range cell estimated by the wind direction wind speed estimation unit. It also has a blast detection unit that detects the blast region in the observation region based on the wind speed value.

According to the present invention, the blast region can be detected in consideration of the background wind.

It is a schematic diagram for demonstrating an example of the image of the observation state of blast by the eddy detection apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the configuration example of the Doppler rider apparatus equipped with the eddy airflow detection apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the structural example of the turbulence detection device which concerns on Embodiment 1. FIG. FIG. 5 is a diagram for explaining an image of a flow in which the first blast detection unit detects a blast cell in the first embodiment. It is a flowchart for demonstrating the outline of operation of the turbulence detection device which concerns on Embodiment 1. FIG. It is a flowchart for demonstrating more specific operation of the turbulence detection apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the structural example of the turbulence detection device which concerns on Embodiment 2. It is a flowchart for demonstrating more specific operation of the turbulence detection apparatus which concerns on Embodiment 2. FIG. It is a figure which shows the structural example of the turbulence detection device which concerns on Embodiment 3. It is a figure explaining the image of the attention range cell and the peripheral range cell when the peripheral range cell is 8 range cells adjacent to the attention cell in Embodiment 3. FIG. It is a flowchart for demonstrating more specific operation of the turbulence detection apparatus which concerns on Embodiment 3. In the eddy turbulence detection device according to the first to third embodiments, the wind direction and wind speed estimation unit that estimates the wind direction value and the wind speed value after removing the range cell in which the response from an unnecessary object is mixed. It is a figure which shows the configuration example. It is a figure for demonstrating the operation of the unnecessary cell suppression part when the wind direction wind speed estimation part is provided with the unnecessary cell suppression part in Embodiment 1 to Embodiment 3. 14A and 14B are diagrams showing an example of the hardware configuration of the turbulence detection device according to the first to third embodiments.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1.
In recent years, due to the increase in aircraft users, it is desired to increase the traffic capacity at airports (hereinafter referred to as "airport traffic capacity"), especially at airports close to large cities. One way to increase airport traffic capacity is to increase the runway utilization rate and increase the number of takeoffs and landings. Although it is one way to increase the number of runways in order to increase the airport traffic capacity, it is generally not easy to increase the number of runways.

Currently, the takeoff and landing intervals of aircraft on the airport surface are sufficient time to avoid the effects of wake turbulence caused by the flight of aircraft, as defined by the ICAO (International Civil Aviation Organization). The distance is used as an index. The wake turbulence refers to a wing tip vortex, a wake vortex, a wake turbulence, a waker bulence, or the like.
However, for example, at an airport having a crossing runway, there is concern that the blast of an aircraft taking off from one runway will affect the aircraft landing on the other runway as a sudden change in wind speed. Therefore, at airports with crossed runways, it is necessary to carry out more complicated operations for setting the takeoff and landing intervals of aircraft, taking into consideration ensuring sufficient time to avoid the effects of blasting.
The blast is high-temperature and high-pressure exhaust, and the range of influence of the blast extends to several hundred meters behind the engine of the aircraft. Therefore, not only the crossing runway but also the close parallel runway, the taxiway other than the runway, the parking lot, etc. are affected by the blast, and the operation of the towing tractor, the tag car, the bus, etc. is also affected. May affect. In this way, it is assumed that the blast of an aircraft will affect other aircraft, etc. on the airport surface of any airport, not limited to airports with crossed runways, and aircraft on the airport surface in consideration of blasting. The takeoff and landing interval must be secured.

On the other hand, blasting can be predicted to some extent by fixed point monitoring by an anemometer installed on the airport surface, aircraft movement information such as the position or speed of the aircraft, or aircraft aircraft information. Therefore, there is known a technique for detecting a blast region by using the position of an aircraft, the movement information of an aircraft, or the airframe information of an aircraft, as in the conventional technique described above.

However, as described above, the behavior of blasting changes greatly depending on the background wind.
In order to increase the utilization rate of the runway, it is necessary to accurately grasp the blast area from moment to moment, whereas in the conventional method of predicting the blast area as described above, the blast area affected by the background wind. It was difficult to grasp accurately.

On the other hand, the eddy detection device according to the first embodiment detects the blast region in consideration of the background wind.

The eddy airflow detection device according to the first embodiment is assumed to be mounted on, for example, a Doppler rider device. This is only an example, and the eddy detection device can be mounted on, for example, various observation devices using waves such as electromagnetic waves or sound waves for measuring the distance and velocity of a remote target or object. Examples of the observation device include a radar device, a rider device, a soda device, and the like. The radar device is, for example, a Doppler radar device, the rider device is, for example, the above-mentioned Doppler radar device, a light wave radar device, or a laser radar device, and the soda device is, for example, a Doppler soda device or a sound wave radar device.
The eddy detection device according to the first embodiment detects a blast area in the observation area by using a received signal obtained as a result of the Doppler rider device transmitting and receiving a beam for observing the observation area in the airport plane.

FIG. 1 is a schematic diagram for explaining an example of an image of a blast observation state by the eddy detection device 1 according to the first embodiment.
The eddy detection device 1 detects the blast region in the observation region where the Doppler rider device 2 scans the beam.
In FIG. 1, the eddy detection device 1 detects a blast region in an observation region set on the airport surface of an airport having an intersecting runway.
As an example in FIG. 1, the eddy detection device 1 detects a blast region at an airport having an intersecting runway, but this is only an example.
The eddy detection device 1 can detect a blast region on the airport surface of any airport.

In FIG. 1, the departure aircraft on the runway A has started taking off in the direction of the arrow 1000a on the left side of the drawing, and the blast 1001 is injected from the rear of the aircraft. Further, the arriving aircraft is approaching the runway B, which intersects the runway A, in the direction of the arrow 1000b on the right side of the drawing.
The Doppler rider device 2 equipped with the eddy turbulence detection device 1 horizontally scans the observation region set to include the runway A and the runway B at a predetermined altitude. The predetermined altitude is, for example, the altitude at which the engine of an aircraft on the runway can exist (hereinafter referred to as "engine altitude"). In FIG. 1, the observation region in which the Doppler rider device 2 scans the beam is represented by a fan shape.
The Doppler rider device 2 performs the beam scanning at a preset cycle. The eddy detection device 1 detects the blast region based on the result of the beam scanning of the observation region by the Doppler rider device 2.

In the following description, the beam scanning from one radius to the other radius of the fan-shaped observation region for one cycle by the Doppler rider device 2 is referred to as one scan or one observation. Here, the observation area is fan-shaped, and the Doppler rider device 2 scans the fan-shaped range with a beam in one cycle. However, the observation region is substantially circular and the Doppler rider device 2 is not limited to this. No. 2 may perform beam scanning in a substantially circular range in one cycle. When the range in which the Doppler rider device 2 scans the beam in one cycle is represented by a substantially circular shape, the scan that goes around is called one scan or one observation. Further, the Doppler rider device 2 may perform beam scanning by transmitting and receiving not only one beam but also a plurality of beams at the same time.

The observation area is divided into an azimuth direction, which is the direction of beam scanning, and a range direction, which is substantially orthogonal to the direction of beam scanning. Specifically, the observation area is divided into a predetermined direction and a predetermined range. Each of a plurality of regions formed by dividing the observation region into the directional direction and the range direction is called a "range cell".
In FIG. 1, the directional direction is indicated by an arrow of 1002 and the range direction is indicated by an arrow of 1003. The range direction is also referred to as a line-of-sight direction.

FIG. 2 is a diagram showing a configuration example of a Doppler rider device 2 equipped with the eddy detection device 1 according to the first embodiment.
As shown in FIG. 2, the Doppler rider device 2 is equipped with an eddy detection device 1, and includes an electromagnetic wave emitting unit 21 and a transmitting / receiving unit 22.

The electromagnetic wave radiating unit 21 radiates an electromagnetic wave based on a transmitted light pulse transmitted from the transmitting / receiving unit 22 to the observation region in a preset period (hereinafter referred to as “wave radiating period”). In the first embodiment, the electromagnetic wave emitting unit 21 converts the transmitted light pulse transmitted from the transmitting / receiving unit 22 into the transmitted light and radiates the transmitted light to the observation region in units of the wave radiation period. Then, the electromagnetic wave emitting unit 21 receives the reflected light of the transmitted light by the atmosphere in the observation region. The electromagnetic wave emitting unit 21 is composed of, for example, a telescope that converges the transmitted light when radiating the transmitted light into space, and a reflecting mirror that controls the direction of radiation.
The transmitted light emitted by the electromagnetic wave emitting unit 21 to the observation region is reflected by fine particles in the atmosphere. At that time, since the Doppler effect occurs according to the wind speed at the reflection position, the frequency of the reflected light by the atmosphere is shifted by the Doppler effect.
The electromagnetic wave emitting unit 21 receives the reflected light from the atmosphere of the transmitted light radiated to the observation region, converts it into an electric signal, and then transmits the electric signal as a receiving signal to the transmitting / receiving unit 22.

The transmission / reception unit 22 generates an electric signal as a transmission light pulse that is a source of transmission light radiated to the observation region via the electromagnetic wave radiation unit 21. Further, the transmission / reception unit 22 receives a reception signal obtained by converting the reflected light by the atmosphere of the transmission light radiated by the electromagnetic wave radiation unit 21 into the observation region into an electric signal by the electromagnetic wave radiation unit 21. The transmission / reception unit 22 performs processing such as amplification and frequency conversion on the received reception signal, and then outputs the received signal after the processing to the eddy detection device 1.

The eddy detection device 1 detects the blast region based on the received signal output from the transmission / reception unit 22. The details of the eddy detection device 1 will be described later.
The eddy detection device 1 outputs information on the blast region and the blast intensity as a result of detecting the blast region. In the first embodiment, the blast intensity means the wind speed value of the blast. The wind speed of the blast is the absolute wind speed.

FIG. 3 is a diagram showing a configuration example of the turbulence detection device 1 according to the first embodiment.
The eddy detection device 1 includes a moment calculation unit 101, a wind direction / wind speed estimation unit 102, a wind speed determination unit 103, a wind direction determination unit 104, and a blast detection unit 105. The blast detection unit 105 includes a first blast detection unit 1051.

The moment calculation unit 101 acquires the received signal output from the transmission / reception unit 22 of the Doppler rider device 2, and from the spectrum of the acquired received signal, the signal strength (so-called “0th moment”) and the Doppler speed (so-called “0th moment”) for each range cell. The so-called "primary moment") or the spectral width (so-called "second moment") or the like is calculated. The Doppler speed is also referred to as the radial velocity. In the first embodiment, the signal strength, the Doppler speed, the spectrum width, and the like calculated by the moment calculation unit 101 based on the received signal are collectively referred to as “moment information”. As a method of calculating the moment information from the received signal of the Doppler rider, a known general method may be used, and thus detailed description thereof will be omitted.
The moment calculation unit 101 applies the calculated moment information to each range cell, and outputs a received signal to the wind direction and speed estimation unit 102. The reception signal that the moment calculation unit 101 adds moment information and outputs to the wind direction wind speed estimation unit 102 is also referred to as a “reception signal after moment application”.

The wind direction and wind speed estimation unit 102 estimates the wind direction value and the wind speed value for each range cell by using the Doppler speed calculated by the moment calculation unit 101 for the received signal after applying the moment output from the moment calculation unit 101. Since the technique for estimating the wind direction value and the wind velocity value from the Doppler velocity is a known technique, detailed description thereof will be omitted. The wind direction and the wind speed estimated by the wind direction wind speed estimation unit 102 are also referred to as a “velocity vector”.
At this time, the wind direction / wind speed estimation unit 102 estimates the wind direction value and the wind speed value using the Doppler velocity obtained based on at least two or more beams included in the predetermined small azimuth angle range. The wind direction and wind speed estimation unit 102 estimates the wind direction value and the wind speed value on the assumption that the wind direction and the wind speed within the small azimuth angle range are uniform. As a method of setting the predetermined small azimuth angle range, there is a method of setting the small azimuth angle range substantially without duplication, such as 0 ° to 10 °, 10 ° to 20 °, and so on. This is only an example, and the small azimuth range may be set while overlapping the small azimuth angle ranges, for example, 0 ° to 10 °, 5 ° to 15 °, and so on.
The wind direction wind speed estimation unit 102 applies the estimated wind direction value and the wind speed value to each range cell of the received signal after applying the moment, and outputs the estimated wind direction value and the wind speed value to the wind speed determination unit 103 and the wind direction determination unit 104. The received signal after applying the moment, which the wind direction and wind speed estimating unit 102 assigns the wind direction and speed and outputs to the wind speed determination unit 103 and the wind direction determination unit 104, is also referred to as a “vector-added received signal”. In addition to the wind direction value and the wind speed value, moment information is also added to each range cell of the received signal after the vector is added.

The wind speed determination unit 103 has a range cell in the blast region (hereinafter referred to as “blast cell”) for each range cell based on the wind speed value assigned to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102. It is determined whether or not the range cell is a candidate for the wind speed blast (hereinafter referred to as "wind speed blast candidate cell"). Specifically, the wind speed determination unit 103 determines for each range cell whether or not the wind speed value of the range cell exceeds a preset threshold value (hereinafter referred to as "wind speed determination threshold value"). The wind speed determination threshold is set in advance by a user or the like to a value suitable for determining blast. When the wind speed value of the range cell exceeds the wind speed determination threshold value, the wind speed determination unit 103 determines that the range cell is a wind speed blast candidate cell, and adds a wind speed blast candidate cell flag to the wind speed blast candidate cell.
The wind speed determination unit 103 outputs the received signal after adding the vector to which the wind speed blast candidate cell flag is added to the wind speed blast candidate cell to the first blast detection unit 1051. The vector-assigned reception signal that the wind speed determination unit 103 assigns the wind speed blast candidate cell flag and outputs to the first blast detection unit 1051 is also referred to as a “wind speed determination post-reception signal”. In the received signal after the wind speed determination, the wind speed blast candidate cell flag is given to the wind speed blast candidate cell, and the moment information, the wind direction value, and the wind speed value are also given to each range cell of the received signal after the wind speed determination. Here, in the received signal after the wind speed determination, the wind speed blast candidate cell flag is given to the wind speed blast candidate cell, and the moment information, the wind direction value, and the wind speed value are given to each range cell. Is only an example, and each range cell of the received signal after the wind speed determination may be provided with at least a wind speed blast candidate cell flag when the range cell is a wind speed blast candidate cell and a wind speed value.

The wind direction determination unit 104 is a range cell in which the range cell is a candidate for a blast cell for each range cell based on the wind direction value given to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102 (hereinafter, “wind direction blast candidate”). It is determined whether or not it is a "cell". Specifically, the wind direction determination unit 104 presets the absolute value of the difference between the wind direction value of the range cell and the preset reference value (hereinafter referred to as "wind direction determination reference value") for each range cell. It is determined whether or not it is within the above range (hereinafter referred to as "wind direction determination range"). In the wind direction determination reference value, a value in a direction in which the wind direction of the range cell is estimated to be blast is set in advance by a user or the like. Specifically, in the wind direction determination reference value, an angle indicating the wind direction of the blast, which poses a threat to the aircraft, is set in advance by the user or the like.

Aircraft are generally considered to be more vulnerable to crosswinds than tailwinds or headwinds. Therefore, blasting poses a threat to aircraft on the runway in general when the blast is a crosswind with respect to the aircraft's airframe, in other words, when the blast is perpendicular to the orientation of the aircraft's airframe. In the first embodiment, the "right angle" does not have to be strictly a "right angle", and the "right angle" also includes a "substantially right angle".
On the other hand, the orientation of the aircraft on the runway is estimated to be approximately parallel to the orientation of the runway. Therefore, when the wind direction is perpendicular to the direction of the runway, it can be said that the wind direction is perpendicular to the direction of the aircraft body.
Therefore, in the first embodiment, the wind direction determination unit 104 winds the range cell, which may be a threat to the aircraft, depending on the angle formed by the direction of the runway and the wind direction value given to the range cell. It shall be determined as a blast candidate cell. Then, it is assumed that the wind direction for determining the wind direction is set to the angle between the runway direction and the wind direction, which indicates the wind direction of the blast that poses a threat to the aircraft. In the first embodiment, as an example, it is assumed that "90 °" is set as the reference value for determining the wind direction. Further, it is assumed that "± 45 °" is set in the wind direction determination range with reference to the wind direction determination reference value 90 °.

When the absolute value of the difference between the wind direction value of the range cell and the wind direction determination reference value is within the wind direction determination range, the wind direction determination unit 104 determines that the range cell is a wind direction blast candidate cell, and tells the wind direction blast candidate cell the wind direction. Add the blast candidate cell flag.
The wind direction determination unit 104 outputs the received signal after adding the vector to which the wind direction blast candidate cell flag is added to the wind direction blast candidate cell to the first blast detection unit 1051. The vector-assigned reception signal that the wind direction determination unit 104 assigns the wind direction blast candidate cell flag and outputs to the first blast detection unit 1051 is also referred to as a “wind direction determination post-reception signal”. In the received signal after the wind direction determination, the wind direction blast candidate cell flag is given to the wind direction blast candidate cell, and the moment information, the wind direction value, and the wind speed value are also given to each range cell of the received signal after the wind direction determination. Here, in the received signal after the wind direction determination, it is assumed that the wind direction blast candidate cell flag is given to the wind direction blast candidate cell, and the moment information, the wind direction value, and the wind speed value are given to each range cell. Is only an example, and each range cell of the received signal after the wind direction determination may be given at least a wind direction blast candidate cell flag when the range cell is a wind direction blast candidate cell and a wind direction value.

The blast detection unit 105 detects the blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction wind speed estimation unit 102.
Specifically, the first blast detection unit 1051 of the blast detection unit 105 blasts based on the wind speed determination reception signal output from the wind speed determination unit 103 and the wind direction determination reception signal output from the wind direction determination unit 104. Detect the area. The first blast detection unit 1051 takes the logical product of the wind speed blast candidate cell in the received signal after the wind speed determination and the wind direction blast candidate cell in the received signal after the wind direction determination, and is a wind speed blast candidate cell and is a wind direction blast candidate cell. A range cell is detected as a blast cell. The blast cell, which is a wind speed blast candidate cell and is a wind direction blast candidate cell, is a range cell in which both the wind speed and the wind direction have the characteristics of blasting. That is, the first blast detection unit 1051 detects a range cell in which both the wind speed and the wind direction have the characteristics of blasting as the blast cell.
The first blast detection unit 1051 may determine the wind speed blast candidate cell or the wind direction blast candidate cell by the wind speed blast candidate cell flag or the wind direction blast candidate cell flag.

Here, FIG. 4 is a diagram for explaining an image of a flow in which the first blast detection unit 1051 detects a blast cell in the first embodiment. In FIG. 4, the observation area of the Doppler rider device 2 is fan-shaped. In FIG. 4, the images of the observation area are shown by 401, 402, and 403. In FIG. 4, the range cell in the observation area is illustrated.
In FIG. 4, the first blast is detected from the wind speed blast candidate cell (shown by 401a in FIG. 4) determined by the wind speed determination unit 103 and the wind direction blast candidate cell (shown by 402a in FIG. 4) determined by the wind direction determination unit 104. Section 1051 shows an image in which a range cell which is a wind speed blast candidate cell 401a and a wind direction blast candidate cell 402a is detected as a blast cell (shown by 403a in FIG. 4). The blast cell 403a is a range cell having blast characteristics in both wind speed and direction. The area containing the blast cell is the blast area.

The first blast detection unit 1051 outputs information about the detected blast region as a blast detection result. Specifically, the first blast detection unit 1051 outputs a reception signal to which at least information as to whether or not it is a blast cell is added to each range cell. In the first embodiment, the first blast detection unit 1051 gives each range cell information on whether or not it is a blast cell, and if the range cell is a blast cell, a reception signal to which a wind speed value and a wind direction value are given. , Shall be output. For example, the first blast detection unit 1051 may give information on whether or not the reception signal is a blast cell, a wind speed value, and a wind direction value to each range cell of the received signal output from the Doppler rider device 2.
In this way, the first blast detection unit 1051 outputs information on the blast region and the blast intensity as a result of detecting the blast region.

The operation of the turbulence detection device 1 according to the first embodiment will be described.
FIG. 5 is a flowchart for explaining an outline of the operation of the turbulence detection device 1 according to the first embodiment.
The moment calculation unit 101 acquires the reception signal output from the transmission / reception unit 22 of the Doppler rider device 2, and calculates the moment information for each range cell from the spectrum of the acquired reception signal (step ST501).
The wind direction / wind speed estimation unit 102 estimates the wind direction value and the wind speed value for each range cell using the Doppler speed calculated by the moment calculation unit 101 for the received signal after applying the moment output from the moment calculation unit 101 in step ST501. (Step ST502).
The blast detection unit 105 detects the blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction wind speed estimation unit 102 in step ST502 (step ST503).

FIG. 6 is a flowchart for explaining a more specific operation of the eddy detection device 1 according to the first embodiment.
Since the specific operations of steps ST601 to ST602 in FIG. 6 are the same as the specific operations of steps ST501 to ST502 in FIG. 5, duplicated description will be omitted.
The wind speed determination unit 103 is a wind speed blast candidate in which the range cell is a candidate for a blast cell for each range cell based on the wind speed value given to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102 in step ST602. It is determined whether or not it is a cell (step ST603). Specifically, the wind speed determination unit 103 determines for each range cell whether or not the wind speed value of the range cell exceeds the wind speed determination threshold value. When the wind speed value of the range cell exceeds the wind speed determination threshold value, the wind speed determination unit 103 determines that the range cell is a wind speed blast candidate cell, and adds a wind speed blast candidate cell flag to the wind speed blast candidate cell.
The wind speed determination unit 103 outputs the received signal after the wind speed determination to which the wind speed blast candidate cell flag is added to the wind speed blast candidate cell to the first blast detection unit 1051.

The wind direction determination unit 104 is a wind direction blast candidate in which the range cell is a candidate for a blast cell for each range cell based on the wind direction value given to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102 in step ST602. It is determined whether or not it is a cell (step ST604). Specifically, the wind direction determination unit 104 determines for each range cell whether or not the absolute value of the difference between the wind direction value of the range cell and the wind direction determination reference value is within the wind direction determination range. When the absolute value of the difference between the wind direction value of the range cell and the wind direction determination reference value is within the wind direction determination range, the wind direction determination unit 104 determines that the range cell is a wind direction blast candidate cell, and tells the wind direction blast candidate cell the wind direction. Add the blast candidate cell flag.
The wind direction determination unit 104 outputs a received signal after the wind direction determination, in which the wind direction blast candidate cell flag is added to the wind direction blast candidate cell, to the first blast detection unit 1051.

The first blast detection unit 1051 determines the blast region based on the wind speed determination post-received signal output from the wind speed determination unit 103 in step ST603 and the wind direction determination post-receiver signal output from the wind direction determination unit 104 in step ST604. Detect (step ST605).
Specifically, the first blast detection unit 1051 takes the logical product of the wind speed blast candidate cell in the received signal after the wind speed determination and the wind direction blast candidate cell in the received signal after the wind direction determination, and is a wind speed blast candidate cell. A range cell, which is a wind direction blast candidate cell, is detected as a blast cell.
The first blast detection unit 1051 outputs information about the detected blast region as a blast detection result.

Although the process of step ST603 and the process of step ST604 are described in parallel in FIG. 6, the process of step ST603 and the process of step ST604 may be sequentially performed.

In the first embodiment described above, the first blast detection unit 1051 takes the logical product of the wind speed blast candidate cell and the wind direction blast candidate cell to detect the blast cell, but this is only an example. For example, the first blast detection unit 1051 may OR the wind speed blast candidate cell and the wind direction blast candidate cell to detect the blast cell.
For example, the wind direction and wind speed estimation unit 102 estimates the wind direction value and the wind speed value, the wind speed determination unit 103 determines the wind speed blast candidate cell, or the wind direction determination unit 104 determines the wind direction blast candidate cell, and the wind speed blast candidate cell is poor. It may be expected that many cells or wind direction blast candidate cells will be overlooked. In such a case, the first blast detection unit 1051 determines that the range cell having the characteristic of blasting at either the wind speed value or the wind direction value is a blast cell, so that the eddy air detection device 1 can be described as described above. It is possible to detect the blast region in consideration of the poor determination accuracy.

Also, in general, in order to accurately estimate the wind direction value and wind speed value, it is necessary to set the small azimuth angle range to some extent. On the other hand, if the small azimuth angle range is set wide, problems such as deterioration of the resolution in the azimuth direction or difficulty in capturing local fluctuations in the wind direction value or the wind speed value may occur. Therefore, when the wind direction wind speed estimation unit 102 estimates the wind direction value and the wind speed value, it may be difficult to secure a wide small azimuth angle range. When it is difficult for the wind direction wind speed estimation unit 102 to secure a wide small azimuth angle range, the wind direction value or wind speed value estimated by the wind direction wind speed estimation unit 102 may include a wind direction value or a wind speed value with deteriorated accuracy. .. As a result, a situation may occur in which the wind speed determination unit 103 misses the wind speed blast candidate cell. In addition, a situation may occur in which the wind direction determination unit 104 misses the wind direction blast candidate cell.

In order to deal with the deterioration in the accuracy of the determination of the wind speed blast candidate cell or the wind direction blast candidate cell as described above, in the above-described first embodiment, the wind speed determination unit 103 determines, for example, the wind speed blast candidate cell. After that, the wind speed blast candidate cell may be corrected by image processing. Further, for example, the wind direction blast candidate cell 104 may determine the wind direction blast candidate cell and then perform image processing correction on the wind direction blast candidate cell. For example, the wind speed determination unit 103 or the wind direction determination unit 104 performs a morphology filter process. Since the morphology filter is a known general process, detailed description thereof will be omitted. However, for example, the wind speed determination unit 103 or the wind direction determination unit 104 improves the spatial inconsistency by performing the closing process. be able to. The closing process is a series of processes in which the morphology filter performs a contraction process after an expansion process. Spatial inconsistency means that the wind speed blast candidate cell or the wind direction blast candidate cell is overlooked. Further, the wind speed determination unit 103 or the wind direction determination unit 104 can remove the erroneously estimated wind speed blast candidate cell or wind direction blast candidate cell by performing the opening process. The opening process is a series of processes in which the morphology filter performs an expansion process after a contraction process.
As described above, the eddy detection device 1 according to the first embodiment determines the range cells having the characteristics of blasting with respect to the wind speed and the wind direction, corrects them, and then determines the final blast region as a logical product or a logical sum. You may try to do it. As a result, it is possible to suppress deterioration of accuracy that occurs in the process of estimating the wind direction value and the wind speed value, and it is possible to detect the blast region with higher accuracy than when the blast region is detected without correction.

As described above, according to the first embodiment, the turbulence detection device 1 is based on the received signal based on the wave motion radiated to the observation region and reflected in the atmosphere of the observation region, in the range direction of the observation region and based on the received signal. A moment calculation unit 101 that calculates the Doppler speed for each range cell divided in the azimuth direction, and a wind direction wind speed estimation unit 102 that estimates the wind direction value and the wind speed value for each range cell based on the Doppler speed calculated by the moment calculation unit 101. The blast detecting unit 105 for detecting the blast region in the observation region is provided based on the wind direction value and the wind speed value for each range cell estimated by the wind direction and wind speed estimation unit 102. More specifically, in the first embodiment, in the turbulence detection device 1, the wind speed value of the range cell exceeds the wind speed determination threshold for each range cell based on the wind speed value for each range cell estimated by the wind direction wind speed estimation unit 102. Based on the wind speed determination unit 103 that determines whether or not the wind speed blast candidate cell is the wind speed blast candidate cell and the wind direction value for each range cell estimated by the wind direction wind speed estimation unit 102, the wind direction value and the wind direction determination reference for each range cell. The wind direction blast candidate cell 104 determines whether or not the difference from the value is within the wind direction determination range, and the blast detection unit 105 is the wind speed blast candidate cell determined by the wind speed determination unit 103. , The first blast detecting unit 1051 for detecting the blast region from the wind direction blast candidate cell determined by the wind direction determining unit is provided. Therefore, the blast region can be detected in consideration of the background wind.

Embodiment 2.
In the first embodiment, the eddy detection device 1 determines the blast region based on the absolute values of the wind direction and the wind speed.
On the other hand, for aircraft on the runway, sudden changes in wind direction and speed on the runway also pose a threat. Therefore, in the second embodiment, the embodiment in which the blast region is detected will be described with the time change of the wind direction and the wind speed as the blast in a broad sense.

The eddy turbulence detection device 1a according to the second embodiment is also mounted on the doppler rider device 2 as an example, like the eddy turbulence detection device 1 according to the first embodiment.
Since the configuration example of the Doppler rider device 2 equipped with the turbulence detection device 1a is the same as the configuration example of the Doppler rider device 2 described with reference to FIG. 2 in the first embodiment, duplicate description will be omitted.
The eddy detection device 1a outputs information on the blast region and the blast intensity as a result of detecting the blast region. In the second embodiment, the blast intensity means a time change of the wind speed of the blast.

FIG. 7 is a diagram showing a configuration example of the turbulence detection device 1a according to the second embodiment.
In FIG. 7, the same reference numerals are given to the same configurations as those of the turbulence detection device 1 described with reference to FIG. 3 in the first embodiment, and duplicate description will be omitted.
The eddy turbulence detection device 1a according to the second embodiment is different from the eddy turbulence detection device 1 according to the first embodiment in the wind direction wind speed storage unit 106, the wind speed time difference calculation unit 107, the wind direction time difference calculation unit 108, the wind speed time difference determination unit 109, and the wind direction. The difference is that the time difference determination unit 110 is provided. Further, the eddy detection device 1a according to the second embodiment is different from the eddy detection device 1 according to the first embodiment in that the blast detection unit 105a includes the second blast detection unit 1052. Further, the eddy detection device 1a according to the second embodiment includes the wind speed determination unit 103, the wind direction determination unit 104, and the first blast detection unit 1051 provided in the eddy detection device 1 according to the first embodiment. I don't prepare.

The wind direction and wind speed storage unit 106 assigns the wind direction value and the wind speed value estimated by the wind direction and wind speed estimation unit 102 to the received signal based on the transmitted light radiated to the observation region during the wave radiation cycle and reflected in the atmosphere of the observation region. , The received signal after the vector is added is stored in the history.
In the second embodiment, the wind direction wind speed estimation unit 102 stores the received signal after adding the vector in the wind direction wind speed storage unit 106. Further, the wind direction wind speed estimation unit 102 outputs the received signal after adding the vector to the wind speed time difference calculation unit 107 and the wind direction time difference calculation unit 108.
Here, as shown in FIG. 7, the wind direction and speed storage unit 106 is provided in the eddy detection device 1a, but this is only an example. The wind direction and speed storage unit 106 may be provided outside the eddy turbulence detection device 1a at a location where the turbulence detection device 1a can be referred to.

The wind speed time difference calculation unit 107 scans the wind speed value of the range cell and the received signal after the vector is applied for each range cell based on the wind speed value added to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102. The difference from the wind speed value of the range cell based on the received signal after the previous vector is added (hereinafter referred to as "wind speed time difference") is calculated.
The wind speed time difference calculation unit 107 acquires the vector-added received signal before one scan of the vector-added received signal output from the wind direction wind speed estimation unit 102 from the wind direction wind speed storage unit 106. For example, it is assumed that the received signal after vector addition is given the date and time when the received signal was acquired by the Doppler rider device 2, and the wind speed time difference calculation unit 107 receives the received signal after vector addition one scan before the date and time. You just have to make a judgment.
If the wind speed time difference calculation unit 107 cannot acquire the received signal after applying the vector one scan before, the received signal after applying the vector acquired at the time of the closest beam scanning within a predetermined time range set in advance. May be the received signal after adding the vector one scan before.
The wind speed time difference calculation unit 107 applies the calculated wind speed time difference information to each range cell of the vector-added received signal output from the wind direction wind speed estimation unit 102, and applies the vector-added received signal to the wind speed time difference determination unit 109. Output to. The received signal after the vector addition, which the wind speed time difference calculation unit 107 adds the wind speed time difference and outputs to the wind speed time difference determination unit 109, is also referred to as “the received signal after the wind speed time difference is applied”. In addition to the wind speed time difference, the wind direction value, the wind speed value, and the moment information are also given to each range cell of the received signal after the wind speed time difference is given.

The wind direction time difference calculation unit 108 scans the wind direction value of the range cell and the received signal after the vector is applied for each range cell based on the wind direction value added to the received signal after the vector is applied, which is output from the wind direction and wind speed estimation unit 102. The difference from the wind direction value of the range cell based on the received signal after the previous vector is added (hereinafter referred to as "wind direction time difference") is calculated. The wind direction time difference is basically represented by a subordinate angle.
The wind direction time difference calculation unit 108 may acquire the vector addition-post-vector reception signal one scan before the vector-added reception signal output from the wind direction wind speed estimation unit 102 in the same manner as the wind speed time difference calculation unit 107.
The wind direction time difference calculation unit 108 applies the calculated wind direction time difference information to each range cell of the vector-added received signal output from the wind direction wind speed estimation unit 102, and the vector-added received signal is given to the wind direction time difference determination unit 110. Output to. The received signal after giving the vector that the wind direction time difference calculating unit 108 gives the wind direction time difference and outputs to the wind direction time difference determining unit 110 is also referred to as “the received signal after giving the wind direction time difference”. In addition to the wind direction time difference, the wind direction value, the wind speed value, and the moment information are also given to each range cell of the received signal after the wind direction time difference is given.

The wind speed time difference determination unit 109 sets the range cell as a candidate for a blast cell for each range cell based on the wind speed time difference information given to the received signal after the wind speed time difference is applied, which is output from the wind speed time difference calculation unit 107. Hereinafter, it is determined whether or not the cell is a “wind speed time difference blast candidate cell”). Specifically, the wind speed time difference determination unit 109 determines whether or not the wind speed time difference assigned to the range cell exceeds a preset threshold value (hereinafter referred to as “wind speed time difference determination threshold value”) for each range cell. To judge. In the wind speed time difference determination threshold value, a value of a change in wind speed over time, which is suitable for determining blast, is set in advance by a user or the like. When the wind speed time difference given to the range cell exceeds the wind speed time difference determination threshold value, the wind speed time difference determination unit 109 determines that the range cell is a wind speed time difference blast candidate cell, and sets the wind speed time difference blast candidate cell as a wind speed time difference blast candidate cell. Add a cell flag.
The wind speed time difference determination unit 109 outputs the received signal after the wind speed time difference is applied to the wind speed time difference blast candidate cell with the wind speed time difference blast candidate cell flag added to the second blast detection unit 1052. The received signal after the wind speed time difference is given, which the wind speed time difference determining unit 109 adds the wind speed time difference blast candidate cell flag and outputs to the second blast detecting unit 1052, is also referred to as "the received signal after the wind speed time difference determination". In the received signal after the wind speed time difference judgment, the wind speed time difference blast candidate cell flag is given to the wind speed time difference blast candidate cell, and the moment information, the wind speed time difference information, the wind direction value and the wind direction value and each range cell of the received signal after the wind speed time difference judgment are given. The wind speed value is also given. Here, in the received signal after the wind speed time difference determination, the wind speed time difference blast candidate cell is given the wind speed time difference blast candidate cell flag, and the moment information, the wind speed time difference information, the wind direction value and the wind speed value are given to each range cell. However, this is only an example, and each range cell of the received signal after the wind speed time difference determination includes at least the wind speed time difference blast candidate cell flag when the range cell is the wind speed time difference blast candidate cell and the wind speed time difference information. Should be given.

The wind direction time difference determination unit 110 sets the range cell as a candidate for a blast cell for each range cell based on the information of the wind direction time difference given to the received signal after the wind direction time difference is applied, which is output from the wind direction time difference calculation unit 108. Hereinafter, it is determined whether or not the cell is a “wind direction time difference blast candidate cell”). Specifically, the wind direction time difference determination unit 110 determines whether or not the wind direction time difference given to the range cell exceeds a preset threshold value (hereinafter referred to as "wind direction time difference determination threshold value") for each range cell. To judge. In the threshold value for determining the wind direction time difference, a value of a change over time in the wind direction suitable for determining blast is set in advance by a user or the like. When the wind direction time difference given to the range cell exceeds the threshold value for determining the wind direction time difference, the wind direction time difference determination unit 110 determines that the range cell is a wind direction time difference blast candidate cell, and sets the wind direction time difference blast candidate cell to the wind direction time difference blast candidate cell. Add a cell flag.
The wind direction time difference determination unit 110 outputs the received signal after the wind direction time difference is given to the wind direction time difference blast candidate cell with the wind direction time difference blast candidate cell flag added to the second blast detection unit 1052. The wind direction time difference determination unit 110 assigns the wind direction time difference blast candidate cell flag and outputs the signal to the second blast detection unit 1052 after the wind direction time difference is applied, which is also referred to as a “wind direction time difference determination received signal”. In the received signal after determining the wind direction time difference, the wind direction time difference blast candidate cell flag is given to the wind direction time difference blast candidate cell, and each range cell of the received signal after determining the wind direction time difference has moment information, wind direction time difference information, wind direction value and The wind speed value is also given. Here, in the received signal after the wind direction time difference determination, the wind direction time difference blast candidate cell is given the wind direction time difference blast candidate cell flag, and the moment information, the wind direction time difference, the wind direction value and the wind speed value are given to each range cell. However, this is only an example, and at least the wind direction time difference blast candidate cell flag when the range cell is the wind direction time difference blast candidate cell and the information of the wind direction time difference are given to each range cell of the received signal after the wind direction time difference determination. It suffices if it is done.

The blast detection unit 105a detects the blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction wind speed estimation unit 102.
Specifically, the second blast detection unit 1052 of the blast detection unit 105a has a wind speed time difference determination reception signal output from the wind speed time difference determination unit 109 and a wind direction time difference determination reception signal output from the wind direction time difference determination unit 110. The blast area is detected based on. The second blast detection unit 1052 takes the logical product of the wind speed time difference blast candidate cell in the received signal after the wind speed time difference determination and the wind direction time difference blast candidate cell in the received signal after the wind direction time difference determination, and is a wind speed time difference blast candidate cell. A range cell, which is a wind direction time difference blast candidate cell, is detected as a blast cell. The blast cell, which is a wind speed time difference blast candidate cell and a wind direction time difference blast candidate cell, is a range cell in which both the wind speed and the wind direction have the characteristics of blasting.
The second blast detection unit 1052 may determine the wind speed time difference blast candidate cell or the wind direction time difference blast candidate cell by the wind speed time difference blast candidate cell flag or the wind direction time difference blast candidate cell flag.

The image of the flow in which the second blast detection unit 1052 detects the blast cell is the same as the image of the flow in which the first blast detection unit 1051 detects the blast cell described with reference to FIG. 4 in the first embodiment. is there. However, since the wind speed time difference and the wind direction time difference extract the temporal changes of the wind speed and the wind direction, the detected blast cell is a range cell in which the wind speed and the wind direction suddenly change in time.
For example, in FIG. 4, the wind speed determination result is the wind speed time difference determination result, the wind direction determination result is the wind direction time difference determination result, the wind speed blast candidate cell 401a is the wind speed time difference blast candidate cell, and the wind direction blast candidate cell 402a is the wind direction time difference blast candidate cell. In other words, it becomes an image of the flow in which the second blast detection unit 1052 detects the blast cell.

The second blast detection unit 1052 outputs the information regarding the detected blast region as the blast detection result. Specifically, the second blast detection unit 1052 outputs a reception signal to which at least information on whether or not the cell is a blast cell is added to each range cell. In the second embodiment, the second blast detection unit 1052 gives each range cell information on whether or not it is a blast cell, and if the range cell is a blast cell, information on the wind speed time difference and information on the wind direction time difference. The received signal shall be output. For example, the second blast detection unit 1052 adds information on whether or not the reception signal is a blast cell, information on the wind speed time difference, and information on the wind direction time difference to each range cell of the received signal output from the Doppler rider device 2. do it.
In this way, the second blast detection unit 1052 outputs information on the blast region and the blast intensity as a result of detecting the blast region.

The operation of the turbulence detection device 1a according to the second embodiment will be described.
The outline of the operation of the eddy detection device 1a according to the second embodiment is the same as the outline of the operation of the eddy detection device 1 according to the first embodiment described with reference to FIG. 5 in the first embodiment. The explanation given is omitted.
FIG. 8 is a flowchart for explaining a more specific operation of the eddy detection device 1a according to the second embodiment.
Since the specific operations of steps ST801 to ST802 of FIG. 8 are the same as the specific operations of steps ST601 to ST602 of FIG. 6 described in the first embodiment, duplicate description will be omitted. ..

The wind direction and wind speed estimation unit 102 stores the received signal after the vector addition to which the wind direction value and the wind speed value estimated in step ST802 are added in the wind direction and wind speed storage unit 106 (step ST803).
The wind speed time difference calculation unit 107 receives the wind speed value of the range cell and the reception after the vector is applied for each range cell based on the wind speed value assigned to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102 in step ST802. The wind speed time difference from the wind speed value of the range cell based on the received signal after the vector is applied before one scanning of the signal is calculated (step ST804).
The wind speed time difference calculation unit 107 outputs the calculated wind speed time difference information to the wind speed time difference determination unit 109 after giving the calculated wind speed time difference information to each range cell of the vector-added reception signal output from the wind direction wind speed estimation unit 102. To do.

The wind speed time difference determination unit 109 selects the wind speed time difference blast candidate for each range cell based on the wind speed time difference information given to the received signal after the wind speed time difference is applied, which is output from the wind speed time difference calculation unit 107 in step ST804. It is determined whether or not the cell is a cell (step ST805). Specifically, the wind speed time difference determination unit 109 determines for each range cell whether or not the wind speed time difference given to the range cell exceeds the wind speed time difference determination threshold value. When the wind speed time difference given to the range cell exceeds the wind speed time difference determination threshold value, the wind speed time difference determination unit 109 determines that the range cell is a wind speed time difference blast candidate cell, and sets the wind speed time difference blast candidate cell as a wind speed time difference blast candidate cell. Add a cell flag.
The wind speed time difference determination unit 109 outputs the received signal after the wind speed time difference determination to which the wind speed time difference blast candidate cell flag is added to the wind speed time difference blast candidate cell to the second blast detection unit 1052.

The wind direction time difference calculation unit 108 adds the wind direction value of the range cell and the wind direction value of the range cell after the vector is applied to each range cell based on the wind direction value given to the received signal after the vector is applied, which is output from the wind direction wind speed estimation unit 102 in step ST802. The wind direction time difference from the wind direction value of the range cell based on the received signal after the vector is applied before one scan of the received signal is calculated (step ST806).
The wind direction time difference calculation unit 108 outputs the calculated wind direction time difference information to the wind direction time difference determination unit 110 after giving the calculated wind direction time difference information to each range cell of the vector-added reception signal output from the wind direction wind speed estimation unit 102. To do.

The wind direction time difference determination unit 110 selects the wind direction time difference blast candidate for each range cell based on the wind direction time difference information given to the received signal after the wind direction time difference is applied, which is output from the wind direction time difference calculation unit 108 in step ST806. It is determined whether or not it is a cell (step ST807). Specifically, the wind direction time difference determination unit 110 determines for each range cell whether or not the wind direction time difference given to the range cell exceeds the wind direction time difference determination threshold value. When the wind direction time difference given to the range cell exceeds the threshold value for determining the wind direction time difference, the wind direction time difference determination unit 110 determines that the range cell is a wind direction time difference blast candidate cell, and sets the wind direction time difference blast candidate cell to the wind direction time difference blast candidate cell. Add a cell flag.
The wind direction time difference determination unit 110 outputs the received signal after the wind direction time difference determination to which the wind direction time difference blast candidate cell flag is added to the wind direction time difference blast candidate cell to the second blast detection unit 1052.

The second blast detection unit 1052 of the blast detection unit 105a receives the signal after the wind speed time difference determination output from the wind speed time difference determination unit 109 in step ST805 and the wind direction time difference determination output from the wind direction time difference determination unit 110 in step ST807. The blast region is detected based on the post-received signal (step ST808).
Specifically, the second blast detection unit 1052 takes the logical product of the wind speed time difference blast candidate cell in the received signal after the wind speed time difference determination and the wind direction time difference blast candidate cell in the received signal after the wind direction time difference determination, and obtains the wind speed time difference blast candidate cell. The range cell, which is a wind direction time difference blast candidate cell, is detected as a blast cell.
The second blast detection unit 1052 outputs the information regarding the detected blast region as the blast detection result. Specifically, the second blast detection unit 1052 receives at least information on whether or not the range cell is a blast cell, and if the range cell is a blast cell, information on the wind speed time difference and the wind direction time difference. Output the signal.

In FIG. 8, the processes of steps ST804 to ST805 and the processes of steps ST806 to ST807 are described in parallel, but the processes of steps ST804 to ST805 and the processes of steps ST806 to ST807 are sequentially performed. You may be asked.

In the second embodiment described above, the second blast detection unit 1052 detects the blast cell by taking the logical product of the wind speed time difference blast candidate cell and the wind direction time difference blast candidate cell. This is an example. It's just that. For example, the second blast detection unit 1052 may OR the wind speed time difference blast candidate cell and the wind direction time difference blast candidate cell to detect the blast cell.

Further, in the second embodiment, the wind speed time difference determination unit 109 may determine the wind speed time difference blast candidate cell and then perform image processing correction on the wind speed time difference blast candidate cell. The wind speed time difference determination unit 109 may perform image processing correction in the same manner as the method described in the first embodiment in which the wind speed determination unit 103 performs image processing correction.
Further, the wind direction time difference determination unit 110 may determine the wind direction time difference blast candidate cell and then perform image processing correction on the wind direction time difference blast candidate cell. The wind direction time difference determination unit 110 may perform image processing correction in the same manner as the method described in the first embodiment in which the wind direction determination unit 104 performs image processing correction.
By making the wind speed time difference determination unit 109 or the wind direction time difference determination unit 110 correct, it is possible to suppress the deterioration of the accuracy that occurs in the process of estimating the wind direction value and the wind speed value, and the wind speed time difference blast candidate cell or the wind direction time difference blast. It is possible to detect the blast area in consideration of the occurrence of oversight of candidate cells.

As described above, according to the second embodiment, the turbulence detection device 1a is based on the received signal based on the wave motion radiated to the observation region and reflected in the atmosphere of the observation region, in the range direction of the observation region and based on the received signal. A moment calculation unit 101 that calculates the Doppler speed for each range cell divided in the azimuth direction, and a wind direction wind speed estimation unit 102 that estimates the wind direction value and the wind speed value for each range cell based on the Doppler speed calculated by the moment calculation unit 101. The blast detecting unit 105 for detecting the blast region in the observation region is provided based on the wind direction value and the wind speed value for each range cell estimated by the wind direction and wind speed estimation unit 102. More specifically, in the second embodiment, the turbulence detection device 1a receives the wind speed value of the range cell and the reception one scan before each range cell based on the wind speed value of each range cell estimated by the wind direction wind speed estimation unit 102. Based on the wind speed time difference calculation unit 107 that calculates the wind speed time difference from the wind speed value of the range cell based on the signal, and the wind direction value for each range cell estimated by the wind direction wind speed estimation unit 102, the wind direction value of the range cell and one scan are performed for each range cell. The wind direction time difference calculation unit 108 that calculates the wind direction time difference from the wind direction value of the range cell based on the previous received signal, and the wind speed time difference calculated by the wind speed time difference calculation unit 107 for each range cell exceeds the wind speed time difference determination threshold. Whether the wind direction time difference blast candidate cell is a wind direction time difference determination unit 109 that determines whether or not the cell is a blast candidate cell, and a wind direction time difference calculation unit 108 that exceeds the wind direction time difference determination threshold for each range cell. A wind direction time difference determination unit 110 for determining whether or not the wind direction time difference is determined, and the blast detection unit 105a is composed of a wind direction time difference blast candidate cell determined by the wind speed time difference determination unit 109 and a wind direction time difference blast candidate cell determined by the wind direction time difference determination unit 110. It is configured to include a second blast detection unit 1052 for detecting a blast region. Even with such a configuration, the eddy detection device 1a can detect the blast region in consideration of the background wind, like the eddy detection device 1 according to the first embodiment.

Embodiment 3.
In the first embodiment, the eddy detection device 1 determines the blast region based on the absolute values of the wind direction and the wind speed.
The blast region can also be estimated by extracting the boundary between the blast cell and the range cell other than the blast cell. Therefore, in the third embodiment, the spatial change of the wind direction and the wind speed is also defined as blast in a broad sense, and the blast region is detected by extracting the boundary between the blast cell and the range cell other than the blast cell by the spatial change of the wind direction and the wind speed. The form of is described.

The eddy turbulence detection device 1b according to the third embodiment is also mounted on the doppler rider device 2 as an example, like the eddy turbulence detection device 1 according to the first embodiment.
Since the configuration example of the Doppler rider device 2 equipped with the turbulence detection device 1b is the same as the configuration example of the Doppler rider device 2 described with reference to FIG. 2 in the first embodiment, duplicate description will be omitted.
The eddy detection device 1b outputs information on the blast region and the blast intensity as a result of detecting the blast region. In the third embodiment, the blast intensity refers to a spatial change in the wind speed of the blast.

FIG. 9 is a diagram showing a configuration example of the turbulence detection device 1b according to the third embodiment.
In FIG. 9, the same reference numerals are given to the same configurations as those of the turbulence detection device 1 described with reference to FIG. 3 in the first embodiment, and duplicate description will be omitted.
The eddy airflow detection device 1b according to the third embodiment is different from the turbulence detection device 1 according to the first embodiment in the wind speed space difference calculation unit 111, the wind direction space difference calculation unit 112, the wind speed space difference determination unit 113, and the wind direction space. The difference is that the difference determination unit 114 is provided. Further, the eddy detection device 1b according to the third embodiment is different from the eddy detection device 1 according to the first embodiment in that the blast detection unit 105b includes a third blast detection unit 1053. Further, the eddy detection device 1b according to the third embodiment includes the wind speed determination unit 103, the wind direction determination unit 104, and the first blast detection unit 1051 provided in the eddy detection device 1 according to the first embodiment. I don't prepare.

The wind speed space difference calculation unit 111 sets the wind speed value of the range cell (hereinafter referred to as “attention range cell”) for each range cell based on the wind speed value given to the received signal after adding the vector output from the wind direction wind speed estimation unit 102. , The difference (hereinafter referred to as "wind speed space difference") from the wind speed value of the range cell around the attention range cell (hereinafter referred to as "peripheral range cell") is calculated. To give a specific example, for example, the wind speed spatial difference calculation unit 111 uses eight range cells adjacent to the range cell of interest as peripheral range cells, and calculates and calculates the difference between the wind speed value of the range cell of interest and the average value of the wind speed values of the peripheral range cells. The difference is the wind speed space difference.
FIG. 10 is a diagram illustrating an image of the attention range cell and the peripheral range cell when the peripheral range cell is an 8-range cell adjacent to the attention cell in the third embodiment.

Here, the wind speed space difference calculation unit 111 calculates the difference between the wind speed value of the range cell of interest and the average value of the wind speed values of the surrounding range cells, and the calculated difference is taken as the wind speed space difference. Is just an example. The wind speed space difference calculation unit 111 may calculate the difference between the wind speed value of the range cell of interest and the median wind speed value of the peripheral range cells as the wind speed space difference. How the wind speed space difference calculation unit 111 calculates the wind speed space difference can be appropriately set.
Further, here, as a specific example, the wind speed spatial difference calculation unit 111 gives an example in which the peripheral range cell is an 8-range cell adjacent to the range cell of interest, but this is only an example. For example, the wind speed space difference calculation unit 111 may set the peripheral range cell as a 4-range cell adjacent to the attention range cell, or the wind speed space difference calculation unit 111 may provide a guard cell and the average value of the range cells separated by one range cell from the attention range cell. Alternatively, the difference from the median value may be calculated as the wind speed space difference. Which range cell the wind speed spatial difference calculation unit 111 uses as the peripheral range cell can be appropriately set.

The wind speed space difference calculation unit 111 applies the calculated wind speed space difference information to each range cell of the received signal after vector addition output from the wind direction wind speed estimation unit 102, in other words, to each attention range cell, and after the vector is added. The received signal is output to the wind speed space difference determination unit 113. The received signal after the vector addition, which the wind speed space difference calculation unit 111 adds the wind speed space difference information and outputs to the wind speed space difference determination unit 113, is also referred to as a “receive signal after the wind speed space difference is applied”. In addition to the wind speed space difference information, the wind direction value, the wind speed value, and the moment information are also given to each range cell of the received signal after the wind speed space difference is given.

The wind direction space difference calculation unit 112 sets the wind direction value of the range cell of interest and the peripheral range cells of the range cell of interest for each range cell based on the wind direction value given to the received signal after the vector is applied, which is output from the wind direction and speed estimation unit 102. The difference from the average value of the wind direction value (hereinafter referred to as "wind direction space difference") is calculated. The wind direction space difference is basically represented by a subordinate angle.

Here, the wind direction space difference calculation unit 112 calculates the difference between the wind direction value of the range cell of interest and the average value of the wind direction values of the surrounding range cells, and the calculated difference is taken as the wind direction space difference. Is just an example. The wind direction space difference calculation unit 112 may calculate the difference between the wind direction value of the range cell of interest and the median wind direction value of the surrounding range cells as the wind direction space difference. How the wind direction space difference calculation unit 112 calculates the wind direction space difference can be appropriately set.
Further, here, as a specific example, the wind direction space difference calculation unit 112 gives an example in which the peripheral range cell is an 8-range cell adjacent to the range cell of interest, but this is only an example. For example, the wind direction space difference calculation unit 112 may use the peripheral range cells as four range cells adjacent to the attention range cell, or the wind direction space difference calculation unit 112 may provide a guard cell and mean the average value of the range cells separated by one range cell from the attention range cell. Alternatively, the difference from the median value may be calculated as the wind direction space difference. Which range cell the wind direction space difference calculation unit 112 uses as the peripheral range cell can be appropriately set.

The wind direction space difference calculation unit 112 applies the calculated wind direction space difference information to each range cell of the received signal after vector addition output from the wind direction wind speed estimation unit 102, in other words, to each attention range cell, and after the vector is added. The received signal is output to the wind direction space difference determination unit 114. The received signal after giving the vector that the wind direction space difference calculating unit 112 adds the information of the wind direction space difference and outputs it to the wind direction space difference determining unit 114 is also referred to as “the received signal after giving the wind direction space difference”. In addition to the wind direction space difference information, the wind direction value, the wind speed value, and the moment information are also given to each range cell of the received signal after the wind direction space difference is given.

The wind speed space difference determination unit 113 selects the range cell as a blast cell candidate for each range cell based on the wind speed space difference information given to the received signal after the wind speed space difference is applied, which is output from the wind speed space difference calculation unit 111. It is determined whether or not the cell is a range cell (hereinafter, “wind speed space difference blast candidate cell”). Specifically, in the wind speed space difference determination unit 113, the wind speed space difference given to the range cell for each range cell exceeds a preset threshold value (hereinafter referred to as “wind speed space difference determination threshold value”). Judge whether or not. In the wind speed spatial difference determination reference value, a value of a spatial change in wind speed suitable for determining blast is set in advance by a user or the like. When the wind speed space difference given to the range cell exceeds the wind speed space difference determination threshold value, the wind speed space difference determination unit 113 determines that the range cell is a wind speed space difference blast candidate cell and sets it as a wind speed space difference blast candidate cell. , Wind speed space difference Blast candidate Cell flag is added.

The wind speed space difference determination unit 113 outputs the received signal after the wind speed space difference is given to the wind speed space difference blast candidate cell with the wind speed space difference blast candidate cell flag added to the third blast detection unit 1053. The received signal after the wind speed space difference is given, which the wind speed space difference determining unit 113 adds the wind speed space difference blast candidate cell flag and outputs to the third blast detecting unit 1053, is also referred to as “the received signal after the wind speed space difference determination”. In the received signal after the wind speed space difference judgment, the wind speed space difference blast candidate cell is given the wind speed space difference blast candidate cell flag, and each range cell of the received signal after the wind speed space difference judgment has moment information and wind speed space difference. Information, wind direction value and wind speed value are also given. Here, in the received signal after the wind speed space difference determination, the wind speed space difference blast candidate cell is given the wind speed space difference blast candidate cell flag, and each range cell is given moment information, wind speed space difference information, wind direction value, and wind speed. It is assumed that a value is given, but this is only an example, and each range cell of the received signal after the wind speed space difference determination is at least a wind speed space difference blast candidate when the range cell is a wind speed space difference blast candidate cell. It suffices if the cell flag and the information on the wind speed space difference are added.

The wind direction space difference determination unit 114 selects the range cell as a blast cell candidate for each range cell based on the wind direction space difference information given to the received signal after the wind direction space difference is applied, which is output from the wind direction space difference calculation unit 112. It is determined whether or not the cell is a range cell (hereinafter referred to as "wind direction space difference blast candidate cell"). Specifically, in the wind direction space difference determination unit 114, the wind direction space difference given to the range cell for each range cell exceeds a preset threshold value (hereinafter referred to as “wind direction space difference determination threshold value”). Judge whether or not. In the threshold value for determining the difference in wind direction space, a value of a spatial change in wind direction suitable for determining blast is set in advance by a user or the like. When the wind direction space difference given to the range cell exceeds the threshold value for determining the wind direction space difference, the wind direction space difference determination unit 114 determines that the range cell is a wind direction space difference blast candidate cell and sets it as a wind direction space difference blast candidate cell. , Wind direction space difference Blast candidate Cell flag is added.

The wind direction space difference determination unit 114 outputs the received signal after the wind direction space difference is given to the wind direction space difference blast candidate cell with the wind direction space difference blast candidate cell flag added to the third blast detection unit 1053. The received signal after the wind direction space difference is given and output to the third blast detecting unit 1053 by the wind direction space difference determining unit 114 with the wind direction space difference blast candidate cell flag is also referred to as a “received signal after the wind direction space difference determination”. In the received signal after determining the wind direction space difference, the wind direction space difference blast candidate cell is given the wind direction space difference blast candidate cell flag, and each range cell of the received signal after determining the wind direction space difference has moment information and wind direction space difference. Information, wind direction and velocity values are also given. Here, in the received signal after determining the wind direction space difference, the wind direction space difference blast candidate cell is given the wind direction space difference blast candidate cell flag, and the moment information, the wind direction space difference, the wind direction value, and the wind speed value are added to each range cell. Although it is assumed that this is given, this is only an example, and each range cell of the received signal after the wind direction space difference determination has at least a wind direction space difference blast candidate cell flag when the range cell is a wind direction space difference blast candidate cell. , Information on the difference in wind direction and space may be added.

The blast detection unit 105b detects the blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction wind speed estimation unit 102.
The third blast detection unit 1053 of the blast detection unit 105b uses the wind speed space difference determination unit 113 output as the wind speed space difference determination signal and the wind direction space difference determination unit 114 as the wind direction space difference determination signal. Based on this, the blast area is detected.
Specifically, the third blast detection unit 1053 takes the logical product of the wind speed space difference blast candidate cell in the received signal after the wind speed space difference determination and the wind direction space difference blast candidate cell in the received signal after the wind direction space difference determination, and obtains the wind speed. A range cell that is a spatial difference blast candidate cell and is a wind direction spatial difference blast candidate cell is detected as a blast cell. The blast cell, which is a wind speed space difference blast candidate cell and a wind direction space difference blast candidate cell, is a range cell in which both the wind speed and the wind direction have the characteristics of blasting.
The third blast detection unit 1053 may determine the wind speed space difference blast candidate cell or the wind direction space difference blast candidate cell by the wind speed space difference blast candidate cell flag or the wind direction space difference blast candidate cell flag.

The image of the flow in which the third blast detection unit 1053 detects the blast cell is the same as the image of the flow in which the first blast detection unit 1051 detects the blast cell described with reference to FIG. 4 in the first embodiment. is there. However, since the wind speed space difference and the wind direction space difference extract the spatial changes in the wind speed and the wind direction, the detected blast cell tends to emphasize the boundary between the blast region and the non-blast region. It may be different from 4.
For example, in FIG. 4, the wind speed determination result is the wind speed space difference determination result, the wind direction determination result is the wind direction space difference determination result, the wind speed blast candidate cell 401a is the wind speed space difference blast candidate cell, and the wind direction blast candidate cell 402a is the wind direction space difference. If it is read as a blast candidate cell, it becomes an image of the flow in which the third blast detection unit 1053 detects the blast cell.

The third blast detection unit 1053 outputs information about the detected blast region as a blast detection result. Specifically, the third blast detection unit 1053 gives each range cell at least information on whether or not it is a blast cell, and the blast cell is a reception signal in which information on the wind speed space difference and information on the wind direction space difference are added. Is output. For example, the third blast detection unit 1053 adds information on whether or not the reception signal is a blast cell, information on the wind speed space difference, and information on the wind direction space difference to each range cell of the received signal output from the Doppler rider device 2. You can do it like this.
In this way, the third blast detection unit 1053 outputs information on the blast region and the blast intensity as a result of detecting the blast region.

The operation of the turbulence detection device 1b according to the third embodiment will be described.
The outline of the operation of the eddy detection device 1b according to the third embodiment is the same as the outline of the operation of the eddy detection device 1 according to the first embodiment described with reference to FIG. 5 in the first embodiment. The explanation given is omitted.

FIG. 11 is a flowchart for explaining a more specific operation of the turbulence detection device 1b according to the third embodiment.
Since the specific operations of steps ST1101 to ST1102 of FIG. 11 are the same as the specific operations of steps ST601 to ST602 of FIG. 6 described in the first embodiment, duplicate description will be omitted. ..
The wind speed space difference calculation unit 111 sets the wind speed value of the range cell of interest and the range cell of interest for each range cell based on the wind speed value given to the received signal after the vector is applied, which is output from the wind direction and wind speed estimation unit 102 in step ST1102. The wind speed space difference from the wind speed value of the peripheral range cell of is calculated (step ST1103).
The wind speed space difference calculation unit 111 receives the calculated wind speed space difference information in each range cell of the received signal after giving the vector output from the wind direction wind speed estimation unit 102, in other words, after giving the wind speed space difference given to each attention range cell. The signal is output to the wind speed space difference determination unit 113.

The wind speed space difference determination unit 113 uses the wind speed of the range cell for each range cell based on the information of the wind speed space difference added to the received signal after the wind speed space difference is applied, which is output from the wind speed space difference calculation unit 111 in step ST1103. It is determined whether or not the cell is a spatial difference blast candidate cell (step ST1104). Specifically, the wind speed space difference determination unit 113 determines for each range cell whether or not the wind speed space difference imparted to the range cell exceeds the wind speed space difference determination threshold value. When the wind speed space difference given to the range cell exceeds the wind speed space difference determination threshold value, the wind speed space difference determination unit 113 determines that the range cell is a wind speed space difference blast candidate cell and sets it as a wind speed space difference blast candidate cell. , Wind speed space difference Blast candidate Cell flag is added.
The wind speed space difference determination unit 113 outputs the received signal after the wind speed space difference determination to which the wind speed space difference blast candidate cell flag is added to the wind speed space difference blast candidate cell to the third blast detection unit 1053.

The wind direction space difference calculation unit 112 sets the wind direction value of the range cell of interest and the range cell of interest for each range cell based on the wind direction value given to the received signal after the vector is applied, which is output from the wind direction and wind speed estimation unit 102 in step ST1102. The wind direction value and the wind direction space difference of the peripheral range cells of the above are calculated (step ST1105).
The wind direction space difference calculation unit 112 receives the calculated wind direction space difference information in each range cell of the vector-added reception signal output from the wind direction wind speed estimation unit 102, in other words, after the wind direction space difference is given to each attention range cell. The signal is output to the wind direction space difference determination unit 114.

The wind direction space difference determination unit 114 sets the wind direction of each range cell based on the information of the wind direction space difference added to the received signal after the wind direction space difference is applied, which is output from the wind direction space difference calculation unit 112 in step ST1105. It is determined whether or not the cell is a spatial difference blast candidate cell (step ST1106). Specifically, the wind direction space difference determination unit 114 determines for each range cell whether or not the wind direction space difference given to the range cell exceeds the threshold value for determining the wind direction space difference. When the wind direction space difference given to the range cell exceeds the threshold value for determining the wind direction space difference, the wind direction space difference determination unit 114 determines that the range cell is a wind direction space difference blast candidate cell and sets it as a wind direction space difference blast candidate cell. , Wind direction space difference Blast candidate Cell flag is added.
The wind direction space difference determination unit 114 outputs the received signal after the wind direction space difference determination to which the wind direction space difference blast candidate cell flag is added to the wind direction space difference blast candidate cell to the third blast detection unit 1053.

The third blast detection unit 1053 of the blast detection unit 105b is the signal received after the wind speed space difference determination 113 output from the wind speed space difference determination unit 113 in step ST1104, and the wind direction space difference determination unit 114 output from the wind direction space difference determination unit 114 in step ST1106. After determining the wind direction space difference, the blast region is detected based on the received signal (step ST1107).
Specifically, the third blast detection unit 1053 takes the logical product of the wind speed space difference blast candidate cell in the received signal after the wind speed space difference determination and the wind direction space difference blast candidate cell in the received signal after the wind direction space difference determination, and obtains the wind speed. A range cell that is a spatial difference blast candidate cell and is a wind direction spatial difference blast candidate cell is detected as a blast cell.
The third blast detection unit 1053 outputs information about the detected blast region as a blast detection result. Specifically, the third blast detection unit 1053 outputs a reception signal to which at least information on whether or not the cell is a blast cell is added to each range cell. In the third embodiment, the third blast detection unit 1053 adds information on whether or not the range cell is a blast cell, and when the range cell is a blast cell, information on the wind speed space difference and information on the wind direction space difference. It is assumed that the received signal to which is added is output.

In FIG. 11, the processes of steps ST1103 to ST1104 and the processes of steps ST1105 to ST1106 are described in parallel, but the processes of steps ST1103 to ST1104 and the processes of steps ST1105 to ST1106 are sequentially performed. You may be asked.

In the above-described third embodiment, the third blast detection unit 1053 takes the logical product of the wind speed space difference blast candidate cell and the wind direction space difference blast candidate cell to detect the blast cell. Is just an example. For example, the third blast detection unit 1053 may OR the wind speed space difference blast candidate cell and the wind direction space difference blast candidate cell to detect the blast cell.

Further, in the third embodiment, the wind speed space difference determination unit 113 may determine the wind speed space difference blast candidate cell and then perform image processing correction on the wind speed space difference blast candidate cell. .. The wind speed spatial difference determination unit 113 may perform image processing correction in the same manner as the method described in the first embodiment in which the wind speed determination unit 103 performs image processing correction.
Further, the wind direction space difference determination unit 114 may determine the wind direction space difference blast candidate cell and then perform image processing correction on the wind direction space difference blast candidate cell. The wind direction space difference determination unit 114 may perform image processing correction in the same manner as the method described in the first embodiment in which the wind direction determination unit 104 performs image processing correction.
By causing the wind speed space difference determination unit 113 or the wind direction space difference determination unit 114 to make corrections, it is possible to suppress deterioration in accuracy that occurs in the process of estimating the wind direction value and the wind speed value, and the wind speed space difference blast candidate cell or It is possible to detect the blast region in consideration of the occurrence of oversight of the wind direction space difference blast candidate cell.

As described above, according to the third embodiment, the turbulence detection device 1b is based on the received signal based on the wave motion radiated to the observation region and reflected in the atmosphere of the observation region, in the range direction of the observation region and based on the received signal. A moment calculation unit 101 that calculates the Doppler speed for each range cell divided in the azimuth direction, and a wind direction wind speed estimation unit 102 that estimates the wind direction value and the wind speed value for each range cell based on the Doppler speed calculated by the moment calculation unit 101. The blast detecting unit 105 for detecting the blast region in the observation region is provided based on the wind direction value and the wind speed value for each range cell estimated by the wind direction and wind speed estimation unit 102. More specifically, in the third embodiment, the turbulence detection device 1b is based on the wind speed value for each range cell measured by the wind direction wind speed estimation unit 102, and for each range cell, the wind speed value of the range cell and the surroundings of the range cell. Based on the wind speed space difference calculation unit 111 that calculates the wind speed space difference from the wind speed value of the range cell and the wind direction value for each range cell estimated by the wind direction wind speed estimation unit 102, the wind direction value of the range cell and the wind direction value of the range cell The wind speed space difference calculation unit 112 that calculates the wind direction space difference from the wind direction value of the surrounding range cells, and the wind speed space difference calculated by the wind speed space difference calculation unit 111 for each range cell exceeds the wind speed space difference determination threshold. The wind speed space difference determination unit 113 that determines whether or not the cell is a space difference blast candidate cell, and the wind direction space difference calculation unit 112 that determines the wind speed space difference for each range cell exceeds the wind direction space difference determination threshold. A wind direction space difference determination unit 114 for determining whether or not the cell is a space difference candidate cell is provided, and the blast detection unit 105b includes a wind speed space difference blast candidate cell determined by the wind speed space difference determination unit 113 and a wind direction space difference determination unit. It is configured to include a third blast detection unit 1053 that detects a blast region from the wind direction space difference blast candidate cell determined by 114. Even with such a configuration, the eddy detection device 1a can detect the blast region in consideration of the background wind, like the eddy detection device 1 according to the first embodiment.

In the above-described first to third embodiments, the turbulence detection devices 1, 1a and 1b include wind speed blast candidate cells, wind direction blast candidate cells, wind speed time difference blast candidate cells, wind direction time difference blast candidate cells, and wind speed space difference blast candidates. After determining the cell or the wind direction space difference blast candidate cell, the wind speed blast candidate cell, the wind direction blast candidate cell, the wind speed time difference blast candidate cell, the wind direction time difference blast candidate cell, the wind speed space difference blast candidate cell, or the wind direction space. By correcting the difference blast candidate cells, it was possible to reduce the effect of accuracy deterioration when estimating the wind direction value and wind speed value. However, not limited to this, in the eddy detection devices 1, 1a, 1b, in the process of estimating the wind direction value and the wind speed value by the wind direction wind speed estimation unit 102, the range cell that leads to the deterioration of the estimation accuracy of the wind direction value and the wind speed value should be excluded. It may be.

On the engine altitude of an aircraft, for example, in addition to a steel tower or a structure for measuring wind direction and wind speed, an object such as another aircraft or a special vehicle may exist, and the object causes an obstacle to observation of the Doppler rider device 2. May become. For example, when a reflection signal from another aircraft body is mixed in a certain range cell, the observed value of the range cell reflects the aircraft body, and the wind direction wind speed estimation unit 102 uses the range cell to obtain the wind direction value and the wind speed value. The estimation result of can be an abnormal value.
Therefore, even if the wind direction and wind speed estimation unit 102 is configured to estimate the wind direction value and the wind speed value after removing the range cell in which the response from the object unnecessary for estimating the wind direction value and the wind speed value is mixed. Good. Hereinafter, an object that is unnecessary for estimating the wind direction value and the wind speed value is simply referred to as an "unnecessary object".

FIG. 12 shows that in the eddy detection devices 1, 1a and 1b according to the first to third embodiments, the wind direction value and the wind speed value are estimated after removing the range cell in which the response from an unnecessary object is mixed. It is a figure which shows the structural example of the wind direction wind speed estimation unit 102a which made it so.
Note that, in FIG. 12, for the sake of simplicity, the description of the components of the eddy detection devices 1, 1a, 1b other than the wind direction and wind speed estimation unit 102a is omitted.
The wind direction wind speed estimation unit 102a includes an unnecessary cell suppression unit 1021.
The unnecessary cell suppression unit 1021 determines unnecessary range cells by using the moment information calculated by the moment calculation unit 101 for the received signal after applying the moment output from the moment calculation unit 101, and suppresses the range cells determined to be unnecessary. The result is output.
The wind direction / wind speed estimation unit 102a estimates the wind direction value and the wind speed value for each range cell by using the Doppler velocity calculated by the moment calculation unit 101 for each range cell after the unnecessary cell suppression unit 1021 suppresses the unnecessary range cell.

FIG. 13 is a diagram for explaining the operation of the unnecessary cell suppression unit 1021 when the wind direction wind speed estimation unit 102a is provided with the unnecessary cell suppression unit 1021 in the first to third embodiments.
Note that FIG. 13 shows an image of data of a certain line of sight. In FIG. 13, the upper row schematically shows the signal strength and the lower row shows the Doppler speed. In the signal strength diagram and the Doppler velocity diagram, the horizontal axis represents the range direction. Objects that are unnecessary when estimating the wind direction value and the wind speed value as described above appear as an increase in the value of the signal strength.

The unnecessary cell suppression unit 1021 detects an unnecessary range cell in which a response from an unnecessary object is mixed, by dividing it into a low-reflecting object and a high-reflecting object.
When the unnecessary object is an object having a small spatial spread, the object often has a relatively low intensity value. Therefore, the unnecessary cell suppression unit 1021 uses a preset threshold value (hereinafter referred to as "low reflector extraction threshold value") for extracting a low-reflecting object from an unnecessary object having a small spatial spread. To detect.
On the other hand, when the unnecessary object is an object having a large spatial expanse such as an aircraft body, the object often has a relatively high intensity value. Therefore, the unnecessary cell suppression unit 1021 uses a preset threshold value (hereinafter referred to as "high reflector extraction threshold value") for extracting a highly reflective object from an unnecessary object having a large spatial spread. To detect.

When the signal strength of the range cell exceeds only the threshold value for extracting low reflectors (see A in FIG. 13), the unnecessary cell suppression unit 1021 invalidates the value of the Doppler speed of the range cell. At this time, when an effective range cell exists around the range cell, the unnecessary cell suppression unit 1021 interpolates the value of the Doppler speed using the Doppler speed of the effective range cell. An effective range cell is a range cell that is not affected by unnecessary objects and has a sufficient signal-to-noise power ratio. Hereinafter, an effective range cell is referred to as an "effective range cell". The unnecessary cell suppression unit 1021 replaces, for example, the value of the Doppler velocity of the range cell whose signal intensity exceeds only the threshold value for extracting low reflectors with the average value or the median value of the Doppler velocity values of the surrounding effective range cells. The velocity values may be interpolated.

When the signal intensity of the range cell exceeds the threshold value for extracting high-reflecting material, in general, a plurality of range cells are often connected, and when the signal strength exceeds the threshold value for extracting high-reflecting material, the range cell beyond the range cell is the Doppler rider device 2. The beam is often blocked and disabled.
Therefore, when the signal intensity of the range cell exceeds the threshold value for extracting high reflectors (see B in FIG. 13), the unnecessary cell suppression unit 1021 invalidates all the values of the Doppler speed of the range cell and the range cell beyond the range cell. To do. At this time, the unnecessary cell suppression unit 1021 is the value of the Doppler speed of the range cell whose signal intensity exceeds the high reflector extraction threshold when there is an effective range cell around the range cell whose signal intensity exceeds the high reflector extraction threshold. Interpolate. The unnecessary cell suppression unit 1021 interpolates the value of the Doppler velocity of the range cell whose signal intensity exceeds the threshold value for extracting high-reflecting substances, and the value of the Doppler velocity of the range cell whose signal intensity exceeds only the threshold value for extracting low-reflecting objects described above. It may be performed in the same manner as the interpolation. When there is no effective range cell around the range cell whose signal intensity exceeds the high-reflecting object extraction threshold value, the unnecessary cell suppression unit 1021 of the unnecessary cell suppression unit 1021 of the range cell whose signal intensity exceeds the high-reflecting object extraction threshold value. The value of Doppler speed is invalid.

The unnecessary cell suppression unit 1021 outputs the information of the range cell in which the value of the Doppler speed is an invalid value as a result of suppressing the range cell determined to be unnecessary.
The wind direction wind speed estimation unit 102a excludes range cells in which the unnecessary cell suppression unit 1021 has an invalid value of the Doppler speed value, which is not subject to the wind direction value and wind speed value estimation processing.

As described above, in the eddy airflow detection devices 1, 1a and 1b, the wind direction wind speed estimation unit 102a is configured to include the unnecessary cell suppression unit 1021, and the unnecessary cell suppression unit 1021 uses the signal strength value of the range cell to generate an unnecessary range cell. The value of the Doppler speed of the range cell determined to be unnecessary and the range cell beyond the range cell determined to be unnecessary may be invalidated. With such a configuration, the eddy detection devices 1, 1a and 1b reduce the chances of estimating the wind direction value and the wind speed value by using a range cell unnecessary for estimating the wind direction value and the wind speed value, and reduce the wind direction. It is possible to reduce the deterioration of the accuracy of the estimation results of the value and the wind speed value. Further, when the unnecessary cell suppression unit 1021 has a range cell in which the value of the Doppler speed is valid around the range cell in which the Doppler speed value is invalidated, the value of the Doppler speed is used by using the Doppler speed of the valid range cell. The eddy airflow detection devices 1, 1a and 1b can reduce the range cells in which the wind direction wind speed estimation unit 102a cannot estimate the wind direction value and the wind speed value, and as a result, detect the blast region. It is possible to reduce the deterioration of accuracy.

Further, in the above-described first to third embodiments, the blast detection unit 105 of the eddy detection device 1 is the first blast detection unit 1051, the blast detection unit 105a of the eddy detection device 1a is the second blast detection unit 1052, and the eddy airflow. The configuration in which the blast detection unit 105b of the detection device 1b includes the third blast detection unit 1053 has been described, but this is only an example. The blast detection units 105, 105a, 105b may be provided in combination with the first blast detection unit 1051, the second blast detection unit 1052, or the third blast detection unit 1053.
To give a specific example, for example, in the eddy detection device 1, the blast detection unit 105 may include a first blast detection unit 1051 and a second blast detection unit 1052. The blast detection unit 105 may further include a third blast detection unit 1053.
However, in the eddy detection devices 1, 1a, 1b, when the blast detection units 105, 105a, 105b include the first blast detection unit 1051, the eddy detection devices 1, 1a, 1b are in the first embodiment. The functions of the wind speed determination unit 103 and the wind direction determination unit 104 described above are also provided. Further, in the eddy detection devices 1, 1a, 1b, when the blast detection units 105, 105a, 105b are provided with the second blast detection unit 1052, the eddy detection devices 1, 1a, 1b are described in the second embodiment. The functions of the wind speed time difference calculation unit 107, the wind direction time difference calculation unit 108, the wind speed time difference determination unit 109, and the wind direction time difference determination unit 110 described above are also provided. Further, in the turbulence detection devices 1, 1a, 1b, when the blast detection units 105, 105a, 105b include the third blast detection unit 1053, the eddy detection devices 1, 1a, 1b are described in the third embodiment. The functions of the wind speed space difference calculation unit 111, the wind direction space difference calculation unit 112, the wind speed space difference determination unit 113, and the wind direction space difference determination unit 114 described above are also provided.

Further, in the above-described first to third embodiments, it is assumed that the eddy detection device 1 is mounted on various observation devices, but this is only an example, and the eddy detection device 1 is a single unit. It may be used in.

14A and 14B are diagrams showing an example of the hardware configuration of the eddy detection devices 1, 1a and 1b according to the first to third embodiments.
In the first to third embodiments, the moment calculation unit 101, the wind direction wind speed estimation units 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, the blast detection units 105, 105a, 105b, and the wind speed time difference. Calculation unit 107, wind direction time difference calculation unit 108, wind speed time difference determination unit 109, wind direction time difference determination unit 110, wind speed space difference calculation unit 111, wind direction space difference calculation unit 112, wind speed space difference determination unit 113, The function of the wind direction space difference determination unit 114 is realized by the processing circuit 1401. That is, the eddy detection devices 1, 1a, 1b detect the blast area in the observation area by using the received signal obtained as a result of the Doppler rider device 2 transmitting and receiving the beam to observe the observation area in the airport plane. A processing circuit 1401 for performing control is provided.
The processing circuit 1401 may be dedicated hardware as shown in FIG. 14A, or may be a CPU (Central Processing Unit) 1405 that executes a program stored in the memory 1406 as shown in FIG. 14B.

When the processing circuit 1401 is dedicated hardware, the processing circuit 1401 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable). Gate Array) or a combination of these is applicable.

When the processing circuit 1401 is the CPU 1405, the moment calculation unit 101, the wind direction wind speed estimation units 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, the blast detection units 105, 105a, 105b, and the wind speed time difference calculation unit 107. , Wind direction time difference calculation unit 108, wind speed time difference determination unit 109, wind direction time difference determination unit 110, wind speed space difference calculation unit 111, wind direction space difference calculation unit 112, wind speed space difference determination unit 113, and wind direction space difference. The function of the determination unit 114 is realized by software, firmware, or a combination of software and firmware. That is, the moment calculation unit 101, the wind direction / wind speed estimation units 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, the blast detection units 105, 105a, 105b, the wind speed time difference calculation unit 107, and the wind direction time difference calculation unit. The 108, the wind speed time difference determination unit 109, the wind direction time difference determination unit 110, the wind speed space difference calculation unit 111, the wind direction space difference calculation unit 112, the wind speed space difference determination unit 113, and the wind direction space difference determination unit 114 are HDDs. It is realized by a processing circuit such as (Hard Disc Drive) 1402, a CPU 1405 that executes a program stored in a memory 1406 or the like, or a system LSI (Large-Scale Integration). The programs stored in the HDD 1402, the memory 1406, or the like include the moment calculation unit 101, the wind direction wind speed estimation units 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, and the blast detection units 105, 105a, 105b. , Wind speed time difference calculation unit 107, wind direction time difference calculation unit 108, wind speed time difference determination unit 109, wind direction time difference determination unit 110, wind speed space difference calculation unit 111, wind direction space difference calculation unit 112, and wind speed space difference determination. It can be said that the procedure and method of the unit 113 and the wind direction space difference determination unit 114 are executed by the computer. Here, the memory 1406 is, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Online Memory), an EEPROM (Electric Optical Memory), etc. A sexual or volatile semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versaille Disc), or the like is applicable.

The moment calculation unit 101, the wind direction wind speed estimation units 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, the blast detection units 105, 105a, 105b, the wind speed time difference calculation unit 107, and the wind direction time difference calculation unit. About the functions of 108, the wind speed time difference determination unit 109, the wind direction time difference determination unit 110, the wind speed space difference calculation unit 111, the wind direction space difference calculation unit 112, the wind speed space difference determination unit 113, and the wind direction space difference determination unit 114. , A part may be realized by dedicated hardware, and a part may be realized by software or firmware. For example, the moment calculation unit 101 realizes its function by the processing circuit 1401 as dedicated hardware, and the wind direction wind speed estimation unit 102, 102a, the wind speed determination unit 103, the wind direction determination unit 104, and the blast detection unit 105, 105a, 105b, wind speed time difference calculation unit 107, wind direction time difference calculation unit 108, wind speed time difference determination unit 109, wind direction time difference determination unit 110, wind speed space difference calculation unit 111, wind direction space difference calculation unit 112, and wind speed. The functions of the space difference determination unit 113 and the wind direction space difference determination unit 114 can be realized by the processing circuit reading and executing the program stored in the memory 1406.
Further, the wind direction and speed storage unit 106 uses the memory 1406. This is just an example, and the wind direction and speed storage unit 106 may be composed of an HDD 1402, an SSD (Solid State Drive), a DVD, or the like.
Further, the eddy detection devices 1, 1a and 1b include an input interface device 1403 and an output interface device 1404 that communicate with an external device such as the Doppler rider device 2.

Further, in the present invention, within the scope of the invention, any combination of each embodiment, modification of any component of each embodiment, or omission of any component in each embodiment is possible. ..

Since the eddy turbulence detection device according to the present invention is configured to detect the blast region in consideration of the background wind, for example, the eddy turbulence detection for detecting the engine exhaust gas injected from the jet engine mounted on the aircraft on the airport surface. It can be applied to the device.

1,1a, 1b turbulence detection device, 101 moment calculation unit, 102, 102a wind direction wind speed estimation unit, 103 wind speed determination unit, 104 wind direction determination unit, 105, 105a, 105b blast detection unit, 1051 first blast detection unit, 1052th 2 blast detection unit, 1053 third blast detection unit, 106 wind direction wind speed storage unit, 107 wind speed time difference calculation unit, 108 wind direction time difference calculation unit, 109 wind speed time difference determination unit, 110 wind direction time difference determination unit, 111 wind speed space difference calculation unit, 112 Wind direction space difference calculation unit, 113 wind speed space difference determination unit, 114 wind direction space difference determination unit, 1021 unnecessary cell suppression unit, 1401 processing circuit, 1402 HDD, 1403 input interface device, 1404 output interface device, 1405 CPU, 1406 memory.

Claims (9)

1. A moment calculation unit that calculates the Doppler velocity for each range cell divided into the range direction and the azimuth direction of the observation area based on the received signal based on the waves radiated to the observation area and reflected in the atmosphere of the observation area.
   A wind direction wind speed estimation unit that estimates the wind direction value and the wind speed value for each range cell based on the Doppler velocity calculated by the moment calculation unit.
   An eddy detection device including a blast detection unit that detects a blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction and wind speed estimation unit.
2. Based on the wind speed value for each range cell estimated by the wind direction wind speed estimation unit, the wind speed determination for each range cell determines whether or not the wind speed value of the range cell is a wind speed blast candidate cell that exceeds the wind speed determination threshold value. Department and
   A wind direction blast candidate cell in which the difference between the wind direction value of the range cell and the wind direction determination reference value is within the wind direction determination range for each range cell based on the wind direction value for each range cell estimated by the wind direction wind speed estimation unit. Equipped with a wind direction determination unit that determines whether or not
   The blast detection unit
   The first aspect of claim 1, wherein the wind speed blast candidate cell determined by the wind speed determination unit and a first blast detection unit for detecting the blast region from the wind direction blast candidate cell determined by the wind direction determination unit are provided. Turbulence detector.
3. The wave is radiated in units of wave radiation period,
   Based on the wind speed value for each range cell estimated by the wind direction wind speed estimation unit, the wind speed time difference between the wind speed value of the range cell and the wind speed value of the range cell based on the received signal one scan before is calculated for each range cell. Wind speed time difference calculation unit and
   Based on the wind direction value for each range cell estimated by the wind direction wind speed estimation unit, the wind direction time difference between the wind direction value of the range cell and the wind direction value of the range cell based on the received signal one scan before is calculated for each range cell. Wind direction time difference calculation unit and
   For each range cell, a wind speed time difference determination unit that determines whether or not the wind speed time difference calculated by the wind speed time difference calculation unit is a wind speed time difference blast candidate cell that exceeds the wind speed time difference determination threshold value.
   Each range cell is provided with a wind direction time difference determination unit that determines whether or not the wind direction time difference calculated by the wind direction time difference calculation unit is a wind direction time difference blast candidate cell that exceeds the threshold value for determining the wind direction time difference.
   The blast detection unit
   A claim comprising a second blast detecting unit that detects a blast region from a wind speed time difference blast candidate cell determined by the wind speed time difference determining unit and a wind direction time difference blast candidate cell determined by the wind direction time difference determining unit. Item 1. The turbulence detection device according to item 1.
4. Based on the wind speed value for each range cell measured by the wind direction wind speed estimation unit, the wind speed space difference calculation for calculating the wind speed space difference between the wind speed value of the range cell and the wind speed value of the range cells around the range cell for each range cell. Department and
   Based on the wind direction value for each range cell estimated by the wind direction wind speed estimation unit, the wind direction space difference calculation for calculating the wind direction space difference between the wind direction value of the range cell and the wind direction value of the range cells around the range cell for each range cell. Department and
   For each range cell, a wind speed space difference determination unit that determines whether or not the wind speed space difference calculated by the wind speed space difference calculation unit is a wind speed space difference blast candidate cell that exceeds the wind speed space difference determination threshold.
   Each range cell is provided with a wind direction space difference determination unit that determines whether or not the wind direction space difference calculation unit calculates whether or not the wind direction space difference is a wind direction space difference blast candidate cell that exceeds the threshold value for determining the wind direction space difference. ,
   The blast detection unit
   The wind speed space difference blast candidate cell determined by the wind speed space difference determination unit and the third blast detection unit for detecting the blast region from the wind direction space difference blast candidate cell determined by the wind direction space difference determination unit are provided. The turbulence detection device according to claim 1.
5. The wave is radiated in units of wave radiation period,
   The blast detection unit
   Based on the wind speed value for each range cell estimated by the wind direction wind speed estimation unit, the wind speed blast candidate cell determined that the wind speed value exceeds the wind speed determination threshold, and each range cell estimated by the wind direction wind speed estimation unit. The first blast detection unit that detects the blast region from the wind direction blast candidate cell for which the difference between the wind direction value and the wind direction determination reference value is determined to be within the wind direction determination range based on the wind direction value.
   Or
   Based on the wind speed value for each range cell estimated by the wind direction wind speed estimation unit, it is determined that the wind speed time difference between the wind speed value and the wind speed value of the range cell based on the received signal one scan before exceeds the wind speed time difference determination threshold. Based on the wind speed time difference blast candidate cell and the wind direction value for each range cell estimated by the wind direction wind speed estimation unit, the wind direction time difference between the wind direction value and the wind direction value of the range cell based on the received signal one scan before is the threshold for determining the wind direction time difference. The second blast detection unit that detects the blast region from the wind direction time difference blast candidate cell determined to exceed
   Based on the wind speed value for each range cell measured by the wind direction and wind speed estimation unit, it is determined that the wind speed space difference between the wind speed value and the wind speed value of the surrounding range cells exceeds the wind speed space difference determination threshold. Based on the wind speed value for each range cell estimated by the cell and the wind direction and wind speed estimation unit, the wind direction is determined to exceed the wind direction space difference determination threshold value between the wind direction value and the wind direction value of the surrounding range cells. The turbulence detection device according to claim 1, further comprising at least two of the third blast detection units that detect the blast region from the spatial difference blast candidate cell.
6. The wind direction and speed estimation unit
   For each range cell, the signal intensity is compared with the threshold value for determining a low reflector, and the signal intensity is compared with the threshold value for determining a high reflector.
   When the signal strength is a range cell that exceeds the threshold value for determining a low reflector and does not exceed the threshold value for determining a high reflector, an unnecessary cell suppression unit that invalidates the value of the Doppler speed of the range cell. The turbulence detection device according to claim 1, wherein the turbulence detection device is provided.
7. The wind direction and speed estimation unit
   For each range cell, the signal intensity is compared with the threshold value for extracting low-reflecting substances, and the signal intensity is compared with the threshold value for extracting high-reflecting substances.
   When the signal strength exceeds the threshold value for extracting low-reflecting substances and exceeds the threshold value for extracting high-reflecting substances, the value of the Doppler speed of the range cell or the range cell beyond the range cell. The turbulence detection device according to claim 1, further comprising an unnecessary cell suppression unit that invalidates the value of the Doppler velocity.
8. The unnecessary cell suppression unit invalidates the value of the Doppler velocity when there is an effective range cell around the range cell in which the value of the Doppler velocity is invalidated for the range cell in which the value of the Doppler velocity is invalidated. The eddy turbulence detection device according to claim 6 or 7, wherein the value of the Doppler velocity of the range cell is interpolated based on the value of the Doppler velocity of the effective range cell.
9. The moment calculation unit calculates the Doppler velocity for each range cell divided into the range direction and the azimuth direction of the observation area based on the received signal based on the wave radiated to the observation area and reflected in the atmosphere of the observation area. Steps and
   A step in which the wind direction and speed estimation unit estimates the wind direction value and the wind speed value for each range cell based on the Doppler speed calculated by the moment calculation unit.
   An eddy detection method comprising a step in which a blast detection unit detects a blast region in the observation region based on the wind direction value and the wind speed value for each range cell estimated by the wind direction and wind speed estimation unit.

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