A sea-skimming altimeter high-low speed equivalent test method and system

Abstract

This invention belongs to the technical field of radar altimeters, specifically disclosing a method and system for conducting high- and low-speed equivalent tests on sea-skimming flight altimeters. The method includes: determining test conditions, including flight trajectory, number of flights, and preset flight speed; controlling a test aircraft to conduct flight tests according to the test conditions; and during the test, collecting altitude data above the sea at preset equivalent speed multiples to obtain equivalent altitude data. This solution solves the technical problem of being unable to achieve altimeter measurement under various speed conditions for sea-skimming flight when the aircraft's flight speed is limited.

Description

Technical Field

[0001] This invention belongs to the technical field of radar altimeters, specifically relating to a high- and low-speed equivalent test method and system for sea-skimming flight altimeters. Background Technology

[0002] A radar altimeter is a radio device installed on aircraft, satellites, or other carriers that uses the reflection properties of electromagnetic waves to measure the relative altitude between the carrier and the ground or water surface. When placed on an aircraft, the altimeter is primarily used to provide relative altitude parameters, and also to provide relative altitude parameters relative to the sea surface when the aircraft is flying at low altitudes over the sea, thus assisting in safe flight.

[0003] Existing radar altimeters are generally classified into pulse radar altimeters and frequency-modulated continuous wave (FM-CHW) radar altimeters based on their signal transmission methods. FM-CHW radar transmits a frequency-modulated continuous wave and coherently mixes the received echo signal with the transmitted signal. Altitude information is extracted from the mixed signal to determine the distance of a carrier from the ground or water surface. Pulse radar altimeters transmit electromagnetic pulse signals and determine the distance to the measured surface by measuring the delay time between the echo signal and the transmitted pulse. Due to their advantages of high measurement accuracy and small size, radar altimetry technology has been widely used in recent years in fields such as aircraft terrain following, remote sensing, radar detection, and sea surface height detection.

[0004] Currently, my country's technology for distance measurement during sea-skimming flight is gradually maturing. However, due to the limitations of the flight environment and external factors on the speed of aircraft in actual flight, it is impossible to achieve high-speed flight at various speeds, high-speed sea-skimming flight, and higher accuracy. Therefore, there are still technical problems such as the limitation of aircraft speed during sea-skimming flight, the inability to achieve high-speed flight, and the inability to perform altitude detection during equivalent high-speed sea-skimming flight. Summary of the Invention

[0005] The purpose of this invention is to provide a high-low speed equivalent test method and system for sea-skimming flight altimeter, so as to solve the technical problem that it is impossible to achieve altimeter measurement under various speed conditions when the aircraft's flight speed is limited.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for conducting high-low speed equivalent tests on a sea-skimming altimeter includes: determining test conditions, including flight trajectory, number of flights, and preset flight speed; controlling a test aircraft to conduct flight tests according to the test conditions; and collecting altitude data above the sea at preset equivalent speed multiples during the test to obtain equivalent altitude data.

[0008] A sea-skimming flight altimeter high-low speed equivalent test system includes: a data acquisition module, an altimeter module, and a data processing module; the data acquisition module is used to acquire and record test data; the altimeter module is used to simulate flight speed and detect altitude above sea level; the data processing module is used to process the data returned by the altimeter module and the data acquisition module, and to perform analytical calculations.

[0009] A computer-readable storage medium storing a computer program configured to execute the above-described sea-skimming altimeter high-low speed equivalent test method at runtime.

[0010] An electronic device includes a memory and a processor, wherein the memory stores a computer program and the processor is configured to execute the above-mentioned sea-skimming altimeter high-low speed equivalent test method through the computer program.

[0011] In this invention, the altimeter module on the test aircraft is decelerated according to the test requirements, and a low-speed equivalent high-speed flight test is achieved in conjunction with the actual flight speed. At the same time as the equivalent high-speed flight test, the flight altitude is detected, thereby realizing equivalent altitude flight detection. This solves the technical problem that the aircraft cannot achieve altimeter measurement under various speed conditions when the flight speed is limited, and achieves the technical effect of altimeter measurement under various speed conditions. Attached Figure Description

[0012] Figure 1 This is a flowchart illustrating a high-low speed equivalent test method for a sea-skimming flight altimeter according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of a high-low speed equivalent test system for a sea-skimming flight altimeter according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the flight equivalent test process in an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of a single flight trajectory in an embodiment of the present invention;

[0016] Figure 5 This is a vertical cross-sectional view of the flight during the effective testing phase in an embodiment of the present invention;

[0017] Figure 6 This is a schematic diagram of flight test altitude information in an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not to a precise scale, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0019] It should be noted that, in order to clearly illustrate the content of this invention, several embodiments are provided to further explain different implementations of the invention. These embodiments are enumerated rather than exhaustive. Furthermore, for the sake of brevity, content mentioned in the preceding embodiments is often omitted in the following embodiments. Therefore, content not mentioned in the later embodiments can be referred to in the preceding embodiments.

[0020] Example 1

[0021] A sea-skimming altimeter high-low speed equivalent test method, such as Figure 1 As shown, the method includes:

[0022] S102, Determine the test conditions, including the flight trajectory, number of flights, and preset flight speed;

[0023] S104, controls the test aircraft to conduct flight tests according to the test conditions;

[0024] S106. During the test, the distance from the sea was collected according to the preset equivalent speed multiple to obtain equivalent height data.

[0025] As an optional implementation method, determining the test conditions also includes: determining the speed equivalent procedure of the test aircraft and the equivalent speed multiple corresponding to the current test.

[0026] As an optional implementation method, before controlling the test aircraft to conduct flight tests according to the test conditions, it also includes: confirming that the structural connections of each module involved in the flight test are correct and that the functional tests are correct.

[0027] As an optional implementation method, during the test, the height data above the sea is collected according to a preset equivalent speed multiple to obtain equivalent height data, including: during the effective test phase of the test process, the height data above the sea is collected according to a preset equivalent speed multiple to obtain equivalent height data.

[0028] As an optional implementation, after obtaining the equivalent altitude data, the method further includes: comparing the equivalent altitude data with the altimeter data to obtain the test results corresponding to the preset flight speed.

[0029] Optionally, the implementation of the above-mentioned sea-skimming altimeter high and low speed equivalent test method is not limited to including the following steps:

[0030] The first step is to build a sea-skimming high-speed flight test system, which is not limited to... Figure 2 As shown, it includes: power supply module, data acquisition module, altimeter module, tooling and bracket module, data processing module, aircraft module, and altitude reference module;

[0031] Power supply module: Provides DC power to the sea-skimming high-speed flight test system.

[0032] The aircraft module's function is to provide sea-skimming flight scenarios and corresponding flight speeds.

[0033] The function of the tooling and mounting module is to fix the altimeter module, power supply module, test data acquisition module and altitude reference module to the aircraft module.

[0034] Data acquisition module: Collects and records experimental data.

[0035] Altimeter Module: Equivalent high-speed flight speed and detects altitude above sea level. The altimeter module is a three-transmitter, three-receiver radar device with a built-in speed equivalence program.

[0036] Data processing module: Processes the signals returned by the altimeter module and the data acquisition module, and performs data calculation and processing through the analysis software in the module.

[0037] The function of the altitude reference module is to record and compare the test status. It includes an altimeter and a monitoring camera. The information recorded by the altimeter is compared with the altitude information parsed by the data processing module to ensure consistency. The monitoring camera is positioned directly below the flight path. After power-on, the camera automatically turns on and begins recording and storing video information.

[0038] The second step is to determine the test conditions and conduct equivalent sea-skimming high-speed flight tests. The procedure is not limited to the following:

[0039] In a single-flight equivalent embodiment, the test includes a pre-test preparation phase, a test flight phase, a formal flight phase, and a test data processing phase, as shown in the appendix. Figure 3 As shown:

[0040] (1) Pre-test preparation stage: After confirming the structural connections of each module of the sea-skimming high-speed flight test system and verifying the accuracy of ground function tests, the test flight phase can begin. In a single-flight equivalent embodiment, the altimeter module is programmed with the required speed equivalence program, providing a speed reduction factor k to decrease the data acquisition speed.

[0041] (2) Test flight phase: The aircraft module confirms that it is in good condition before takeoff and takes off from the airport as required. After takeoff, it flies to the designated airspace and begins preparations for the equivalent test of the sea-skimming high-speed flight altimeter.

[0042] (3) Formal Flight Phase: During the test phase, the aircraft module flies according to a predetermined trajectory. The trajectory of a single flight is similar to a "five-sided flight" as shown in the attached figure. Figure 4 As shown, a single flight process can be divided into an effective test phase and a transitional flight phase. The actual flight speed v during the effective test phase... r The vertical cross-sectional view is attached. Figure 5 As shown, the flight does not land or touch the ground during the flight, and the test is repeated until the specified number of times is completed.

[0043] (4) Test Data Processing Stage: In a single flight equivalent embodiment, the altitude signal is processed using the data processing module and compared with the signal collected by the altimeter in the altitude reference module. The equivalent velocity is v. e =kv r Altitude information is attached. Figure 6 As shown.

[0044] This application proposes a novel equivalent test method to address the limitations of aircraft in actual flight environments. The actual flight speed v of the aircraft is used in the test. r The detection equipment on the aircraft, namely the altimeter module, has built-in software that reduces the speed by a factor of k according to the experimental requirements, resulting in an equivalent speed of v. e =kv r This enables low-speed equivalent high-speed flight tests. While achieving equivalent high-speed flight tests, the altimeter module detects flight altitude, thus solving the technical problem of being unable to measure altitude by altimeter under various speed conditions when the aircraft's flight speed is limited.

[0045] Example 2

[0046] A high-low speed equivalent test system for a sea-skimming altimeter, applying the aforementioned high-low speed equivalent test method for sea-skimming altimeters, such as... Figure 2 As shown, the system includes: a data acquisition module, an altimeter module, and a data processing module;

[0047] The data acquisition module is used to collect and record experimental data;

[0048] The altimeter module is used to measure the equivalent flight speed and detect altitude above sea level;

[0049] The data processing module is used to process the data returned by the altimeter module and the data acquisition module, and to perform analysis and calculation.

[0050] As an optional implementation, it also includes a power supply module for providing DC power to the sea-skimming high-speed flight test system.

[0051] As an optional implementation, it also includes: a height reference module for comparing equivalent height data with altimeter height data.

[0052] As an optional implementation, it also includes: an aircraft module for determining the sea-skimming flight scenario and the corresponding flight speed;

[0053] As an optional implementation, it also includes: a tooling and mounting module for fixing the altimeter module, power supply module, data acquisition module and altitude reference module to the aircraft module.

[0054] In this embodiment, the altimeter module on the test aircraft reduces the speed according to the test requirements, and the low-speed equivalent high-speed flight test is achieved in conjunction with the actual flight speed. At the same time as the equivalent high-speed flight test, the flight altitude is detected, thereby realizing the equivalent altitude flight detection. This solves the technical problem that the aircraft cannot achieve altimeter measurement under various speed conditions when the flight speed is limited, and achieves the technical effect of altimeter measurement under various speed conditions.

[0055] Example 3

[0056] In another aspect, the present invention provides an electronic device for implementing the above-described sea-skimming altimeter high-low speed equivalent test method. This electronic device is not limited to a terminal device or server within a system. The electronic device includes, but is not limited to, a memory and a processor. The memory stores a computer program, and the processor is configured to execute the steps of any of the above-described method embodiments via the computer program.

[0057] Example 4

[0058] In another aspect, the present invention provides a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various optional embodiments of the above-described sea-skimming altimeter high-low speed equivalent test method. The computer program is configured to execute the steps in any of the above-described method embodiments when running.

Claims

1. A method for conducting equivalent high- and low-speed tests on a sea-skimming altimeter, characterized in that, include: Determine the test conditions, including the flight trajectory, number of flights, and preset flight speed; The test aircraft was controlled to conduct flight tests according to the test conditions. During the experiment, the height data above the sea was collected according to the preset equivalent speed multiple to obtain equivalent height data; By comparing the equivalent altitude data with the altimeter data, the test results corresponding to the preset flight speed are obtained; the actual flight speed of the aircraft during the test... The detection equipment placed on the aircraft was slowed down according to the test requirements. The processing speed is [times] times, with an equivalent speed of [speed]. This enables low-speed equivalent high-speed flight tests, and simultaneously conducts flight altitude detection.

2. The high-low speed equivalent test method for sea-skimming altimeter as described in claim 1, characterized in that, Determining the test conditions also includes: determining the equivalent speed procedure for the test aircraft and the equivalent speed multiple corresponding to the current test.

3. The high and low speed equivalent test method for sea-skimming altimeter as described in claim 1, characterized in that, Before the test aircraft conducts flight tests according to the test conditions, it also includes: confirming that the structural connections of each module involved in the flight test are correct and that the functional tests are correct.

4. The high and low speed equivalent test method for sea-skimming altimeter as described in claim 1, characterized in that, During the experiment, the altitude data above the sea was collected according to the preset equivalent speed multiple, and the equivalent altitude data was obtained. This included: during the effective experimental phase of the experiment, the altitude data above the sea was collected according to the preset equivalent speed multiple, and the equivalent altitude data was obtained.

5. A high-low speed equivalent test system for a sea-skimming altimeter, employing the high-low speed equivalent test method for a sea-skimming altimeter as described in any one of claims 1 to 4, characterized in that, include: Data acquisition module, altimeter module, and data processing module; The data acquisition module is used to collect and record experimental data; The altimeter module is used to measure the equivalent flight speed and detect the altitude above the sea. The data processing module is used to process the data returned by the altimeter module and the data acquisition module, and to perform analysis and calculation.

6. The high-low speed equivalent test system for sea-skimming flight altimeter as described in claim 5, characterized in that, Also includes: The power supply module is used to provide DC power to the sea-skimming high-speed flight test system.

7. The high-low speed equivalent test system for sea-skimming flight altimeter as described in claim 6, characterized in that, Also includes: The altitude reference module is used to compare equivalent altitude data with altimeter altitude data.

8. The high-low speed equivalent test system for sea-skimming flight altimeter as described in claim 7, characterized in that, Also includes: The aircraft module is used to determine the sea-skimming flight scenario and the corresponding flight speed.

9. The high-low speed equivalent test system for sea-skimming flight altimeter as described in claim 8, characterized in that, Also includes: Tooling and mounting modules are used to fix the altimeter module, power supply module, data acquisition module, and altitude reference module to the aircraft module.

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