Active meteorological radar self-adaptive scanning design method based on low-power-consumption radio frequency

Abstract

The invention provides an active meteorological radar adaptive scanning design method based on low-power-consumption radio frequency, and belongs to the technical field of airborne radars, and the method specifically comprises the steps: carrying out the full-period scanning and refined detection of an airborne meteorological radar in an initial state; after the airborne meteorological radar completes initialization scanning and detection, the temperature of the airborne meteorological radar is obtained; calculating the temperature change rate of each component of the airborne meteorological radar based on the temperature sensor; calculating a stepping adjustment coefficient based on the current temperature value, the temperature change rate and the working temperature range; calculating a beam scanning step value based on the step adjustment coefficient; according to the processing scheme, heat dissipation of the system is reduced, and it is guaranteed that the system can stably work in a normal temperature environment.

Description

Technical Field

[0001] The present application relates to the field of airborne radar, and in particular to a method for designing an adaptive scanning system of an active weather radar based on low-power radio frequency. Background Art

[0002] Airborne weather radar is installed on the aircraft to detect meteorological targets such as rainfall, turbulence, wind shear and thunderstorms in front of the aircraft, and provide information such as weather intensity and location on the route to assist pilots in formulating flight strategies and ensure the flight safety of the aircraft. At present, according to the antenna design principle of airborne weather radar, it can be divided into active system and passive system. The active system controls the signal phase through the T / R component, which can quickly realize beam forming at any pointing angle and has the advantage of beam agility. However, due to the increase of electronic devices, the power consumption of the entire system is greater and the heat dissipation is more.

[0003] Since active antennas use T / R components to radiate and receive electromagnetic waves, power consumption is increased and the device generates additional heat. To ensure that the device can work within the normal temperature range, technical methods are needed to optimize the heat dissipation design. Currently, the technical approach to optimizing heat dissipation is mostly to increase the air volume of the fan, that is, to increase the fan power or increase the ventilation aperture to improve the heat dissipation efficiency.

[0004] The existing technology has the following disadvantages: Main disadvantage 1: Improving the heat dissipation capacity of the fan means a larger and heavier fan. Optimizing heat dissipation through this method will increase the overall weight and volume of the system, increase the fuel consumption of civil aircraft, and is not conducive to the economic efficiency of operation. Main disadvantage 2: Increasing the wind speed of the fan will increase the noise of the system, which is not conducive to the overall comfort of civil aircraft. Main disadvantage 3: The equipment cabin of civil aircraft is mostly a sealed cabin, which makes it difficult to achieve gas exchange with the outside world, and it is difficult to achieve heat dissipation through ventilation. Summary of the invention

[0005] In view of this, the present application provides an active weather radar adaptive scanning design method based on low-power radio frequency, which solves the problems in the prior art, optimizes the design of the airborne weather radar system, reduces system heat dissipation, and ensures that the system can work stably under normal temperature environment.

[0006] The present application provides an active weather radar adaptive scanning design method based on low-power radio frequency using the following technical solutions:

[0007] A method for designing an active weather radar adaptive scanning based on low-power radio frequency includes the following steps:

[0008] The airborne weather radar performs full-cycle scanning and refined detection in the initial state;

[0009] After the airborne weather radar completes initialization scanning and detection, the temperature of the airborne weather radar is obtained;

[0010] Calculate the temperature change rate of each component of the onboard weather radar based on the temperature sensor;

[0011] Calculate the step adjustment factor based on the current temperature value, the temperature change rate and the operating temperature range;

[0012] Calculate the beam scanning step value based on the step adjustment coefficient;

[0013] Based on the beam scanning step value, a new scanning strategy is formed.

[0014] Optionally, the specific method of full-cycle scanning and refined detection includes: the airborne weather radar uses a complete antenna row cycle to complete the traversal of all beam pointing angles.

[0015] Optionally, based on the current temperature value T, the temperature change rate ΔT and the operating temperature range T max , calculate the step adjustment coefficient

[0016] Optionally, the beam scanning step value Δθ is calculated based on the step adjustment coefficient k i = kΔθ i-1 .

[0017] Optionally, a specific method for obtaining the temperature of the airborne weather radar is: obtaining temperature values ​​of the T / R component and the radio frequency component.

[0018] Optionally, the step value of the airborne weather radar in the initial state is 0.1-0.2 degrees.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] The method of the present application reduces system heat dissipation by increasing the scanning step to a low-power scanning mode according to the real-time working status of the system when the temperature of the component is too high. Compared with the prior art methods, the method can effectively reduce system heat dissipation without increasing the weight, volume and noise of the airborne meteorological radar system, and can meet the requirements of civil aviation aircraft for economy and comfort.

[0021] The method of the present application can be applied to the field of airborne meteorological radars, and can maximize the detection performance while ensuring safe and stable operation, and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 Flowchart of the design method for adaptive scanning of low-power RF-based active weather radar. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0026] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0028] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0029] The embodiment of the present application provides an adaptive scanning design method for an active weather radar based on low-power radio frequency.

[0030] like Figure 1 As shown, a method for designing an adaptive scanning of an active weather radar based on low-power radio frequency includes the following steps:

[0031] The airborne weather radar performs a full-cycle scan in the initial state and takes a small step value for refined detection. In this case, the radar uses the complete antenna row period t to complete the traversal of all beam pointing angles. At this time, the radar has the maximum power consumption and heat dissipation. In one embodiment, the step value of the airborne weather radar in the initial state is 0.1-0.2 degrees.

[0032] After the airborne weather radar completes the initialization scan and detection, the temperature of the airborne weather radar is obtained, specifically the temperature value T of the T / R component and the RF component, and the operating temperature range of the T / R component is pre-set, T max When the system is working normally, T≤T max .

[0033] Calculate the rate of temperature change of each component of the onboard weather radar based on the temperature sensor.

[0034] Calculates the step adjustment factor based on the current temperature value, the rate of temperature change, and the operating temperature range.

[0035] The beam scanning step value is calculated based on the step adjustment coefficient.

[0036] Based on the beam scanning step value, a new scanning strategy is formed and then periodically iterated.

[0037] The specific methods of full-cycle scanning and refined detection include: the airborne meteorological radar uses the complete antenna row cycle to complete the traversal of all beam pointing angles.

[0038] Based on the current temperature value T, temperature change rate ΔT and operating temperature range T max , calculate the step adjustment coefficient Calculate the beam scanning step value Δθ based on the step adjustment coefficient k i = kΔθ i-1 , where i is a positive integer and satisfies Δθ i ≥Δθ0. When k>1, the system automatically increases the step value of the radar scan. At this time, the component working time is shortened and the system heat dissipation is reduced to control the temperature drop of the component.

[0039] The specific method of obtaining the temperature of the airborne weather radar is to obtain the temperature values ​​of the T / R component and the RF component. T / R is the abbreviation of Transmitter and Receiver. The T / R component usually refers to the part between the RF and the antenna in a wireless transceiver system, that is, one end of the T / R component is connected to the antenna, and the other end is connected to the intermediate frequency processing unit to form a wireless transceiver system. Its function is to amplify, phase shift, and attenuate the signal.

[0040] The present application monitors the temperature of the airborne radar system in real time, and dynamically adjusts the scanning strategy of the antenna and RF components in the system based on different temperatures. When the real-time temperature is still significantly lower than the upper limit of the normal operating temperature of the system, a refined step scan is used to improve the detection performance. When the real-time temperature is close to the upper limit of the normal operating temperature or the temperature threshold set based on the predictable system power consumption, a low-power scanning mode is used. Under the premise that the scanning period of each line of the antenna remains unchanged, the scanning step of the antenna is appropriately increased to reduce the power consumption of the T / R components and the RF components.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for designing an adaptive scanning system for an active weather radar based on low-power radio frequency, characterized in that: The steps include: The airborne weather radar performs full-cycle scanning and refined detection in the initial state; After the airborne weather radar completes initialization scanning and detection, the temperature of the airborne weather radar is obtained; Calculate the temperature change rate of each component of the onboard weather radar based on the temperature sensor; Calculate the step adjustment factor based on the current temperature value, the temperature change rate and the operating temperature range; Calculate the beam scanning step value based on the step adjustment coefficient; Based on the beam scanning step value, a new scanning strategy is formed.

2. The method for designing an active weather radar adaptive scanning system based on low power radio frequency according to claim 1, characterized in that: The specific methods of full-cycle scanning and refined detection include: the airborne meteorological radar uses the complete antenna row cycle to complete the traversal of all beam pointing angles.

3. The method for designing an active weather radar adaptive scanning based on low power radio frequency according to claim 1, characterized in that: Based on the current temperature value T, temperature change rate ΔT and operating temperature range T max , calculate the step adjustment coefficient 4. The method for designing an active weather radar adaptive scanning based on low power radio frequency according to claim 1, characterized in that: Calculate the beam scanning step value Δθ based on the step adjustment coefficient k i = kΔθ i-1 .

5. The method for designing an active weather radar adaptive scanning based on low power radio frequency according to claim 1, characterized in that: The specific method for obtaining the temperature of the airborne weather radar is: obtaining the temperature values ​​of the T / R component and the radio frequency component.

6. The method for designing an active weather radar adaptive scanning based on low power radio frequency according to claim 1, characterized in that: The step value of the airborne weather radar in the initial state is 0.1-0.2 degrees.

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