CN109444907B - System and method for testing transverse distribution change rule of airplane wheel track - Google Patents
System and method for testing transverse distribution change rule of airplane wheel track Download PDFInfo
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- CN109444907B CN109444907B CN201811539618.XA CN201811539618A CN109444907B CN 109444907 B CN109444907 B CN 109444907B CN 201811539618 A CN201811539618 A CN 201811539618A CN 109444907 B CN109444907 B CN 109444907B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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Abstract
The invention discloses a system and a method for testing the transverse distribution change rule of an airplane wheel track. Wherein: the laser distance measuring sensor is mainly used for measuring the distance between the near-side tire and the laser testing unit when the airplane runs; the time synchronization and data processing unit is used for screening the test data of the laser ranging sensor and marking all screened effective data with uniform time parameters; the power supply unit provides power required by testing for the laser ranging sensor and the video unit; the data storage unit is used for storing the data processed by the time synchronization and data processing unit; the computer is used for carrying out later analysis processing on the data stored in the data storage unit at a specific time; the invention has the beneficial effect that the transverse distribution change rule of the wheel tracks of the airplane can be accurately tested.
Description
Technical Field
The invention belongs to the technical field of airplane data measurement, and relates to a system and a method for testing the transverse distribution change rule of an airplane wheel track.
Background
The transverse distribution of wheel tracks is an important parameter for airport traffic load analysis and airport pavement design, the current system for testing the transverse distribution of airplane wheel tracks is mainly divided into an infrared system and a laser system, the infrared wheel track distribution testing system is low in cost, but limited in measuring distance, easy to be influenced by the environment and relatively low in measuring precision, so that the laser ranging-based aircraft wheel track transverse distribution testing system becomes a mainstream choice, and in recent years, mechanisms such as American FAA and domestic university and the like apply a laser ranging technology to correspondingly test the transverse distribution of the airplane wheel tracks. However, in terms of design thought, there are places worth improving both domestically and abroad. The current testing method mainly tests the value of the transverse distribution of the wheel tracks of one or more typical sections of the runway, and the value is used as a reference basis for the transverse distribution of the wheel tracks of the airplanes on the whole runway. In fact, however, as the speed, the sliding distance and the attitude of the aircraft change, the law of the transverse distribution of the wheel traces on different sections changes, and the practice of using test data of a small number of sections as a reference for the transverse distribution of the wheel traces in the whole sliding process is obviously questionable, and an accurate grasp on the law of the transverse distribution of the wheel traces is necessary, which is not possessed by the current test method.
Disclosure of Invention
The invention aims to provide a system for testing the transverse distribution change rule of a wheel track of an airplane, which solves the problem that the prior test data of a small number of sections is not accurate as the transverse distribution data of the wheel track in the whole running process.
The invention relates to a system for testing the transverse distribution change rule of an airplane wheel track. Wherein: the laser distance measuring sensor is mainly used for measuring the distance between the near-side tire and the laser testing unit when the airplane runs; the time synchronization and data processing unit is used for screening the test data of the laser ranging sensor and marking all screened effective data with uniform time parameters; the power supply unit provides power required by testing for the laser ranging sensor and the video unit; the data storage unit is used for storing the data processed by the time synchronization and data processing unit; the computer is used for carrying out later analysis processing on the data stored in the data storage unit at a specific time, such as after the test of one stage is finished; the runway is divided into two test areas, an area 1 is divided into two parts which respectively correspond to an airplane landing grounding area and an airplane takeoff and landing area, the lengths of the two parts are 300m, the grounding area takes a T-shaped cloth as a center, the specific position of the landing area is determined according to the situation that the airplane takes off and lands on site, and each part of the area is provided with 7 laser ranging sensors at an interval of 50m; area 2 is the running area between the two parts of area 1, and the spacing of 10 groups of laser ranging sensors is evenly distributed according to the actual length of area 2.
Further, the laser ranging sensor is composed of a plurality of laser ranging sensors, and all the laser ranging sensors are arranged in a line parallel to the running direction.
Further, the data for screening the test data of the laser ranging sensor comprises data of the laser ranging sensor test when no plane passes and data with larger test error.
The invention relates to a test method of an airport runway traffic distribution test system, which comprises the following steps:
the method comprises the following steps that firstly, a test system is reasonably arranged according to the actual conditions (including factors such as runway length and power supply position) of a test airport, the position of each laser test sensor in a laser test unit is calibrated, and the device is detected by starting up before formal test;
when an airplane passes by, the system can test the distance between the near-side tire of the airplane with different sections and the laser test unit and transmit test data to the time synchronization and data processing unit;
step three, the time synchronization and data processing unit screens the data transmitted by the laser test unit and marks time parameters for effective data according to a receiving sequence;
step four, after the time synchronization and the data processing unit finishes processing, the data are led into the data storage unit for storage;
step five, repeating the step two to the step four until the test of the stage is finished;
and step six, importing the data in the data storage unit into a computer for checking to see whether to perform the supplementary test. If the data is checked to be correct, the data can be analyzed in the computer at the later stage.
The invention has the beneficial effect that the transverse distribution change rule of the wheel tracks of the airplane can be accurately tested.
Drawings
FIG. 1 is a system framework diagram of the test system of the present invention;
FIG. 2 is a plan view of a field layout of one embodiment of the test system of the present invention;
FIG. 3 (A) is a schematic diagram of the cross section of the laser ranging module for testing the airplane wheel;
FIG. 3 (B) is a schematic side view of the laser ranging module for testing the airplane wheel;
FIG. 4 is a schematic diagram of the test of the transverse distribution of the wheel tracks.
In the figure, 1 is a laser ranging sensor, 2 is a time synchronization and data processing unit, 3 is a power supply unit, 4 is a data storage unit, and 5 is a computer.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Fig. 1 shows a system framework diagram of the testing system of the present invention, which includes a plurality of laser ranging sensors 1, a time synchronization and data processing unit 2, a power supply unit 3, a data storage unit 4, and a computer 5.
The maximum range of the laser ranging sensor 1 is 100m (a natural reflecting surface), the ranging precision is less than 5cm, and the measuring frequency can reach 4KHZ in order to meet the requirement of measuring high-speed moving objects. The main function of the laser ranging sensor 1 is to measure the distance of the aircraft proximal tire passing the sensor from the sensor and to transmit the data of the test to the time synchronization and data processing unit 3. The time synchronization and data processing unit 2 is used for receiving the test data of the laser ranging sensor 1 and rejecting invalid data in the test data, the data to be rejected comprises the test data when no airplane passes and the test data with obvious errors, the transverse distribution of the airplane wheel tracks has a certain fluctuation range according to the test data obtained by experiments, and the fluctuation range is mainly concentrated in the two-thirds runway width range, so that the test range of the laser ranging sensor in the two-thirds runway width range of the transverse distribution of the wheel tracks is determined according to the actual test condition, the data in the range is valid data, and other data can be rejected by the time synchronization and data processing unit 2; after the screening is completed, the time synchronization and data processing unit 2 marks a time parameter for each valid data according to the received data. The power supply unit 3 supplies power to the laser test unit and the data time synchronization and data processing unit 2, and the same power supply voltage is 12V; for the requirement of long-term test, the system adopts a field power supply mode, a power supply is provided by an airport, and the power supply unit 3 converts the voltage of the power supply into the voltage required by equipment. The data storage unit 4 is mainly used for storing the data processed by the time synchronization and data processing unit 2, and can import the data into the computer 5 for post-processing when necessary. The computer 5 is mainly used for carrying out post-processing on the tested effective number, and comprises the calculation of the distribution of a plurality of cross-section transverse tracks and the calculation of the airplane running speed; and calculating and analyzing the relationship between the transverse distribution relationship of the wheel tracks and the speed and the running distance.
Fig. 2 is a plan view of a field layout of an embodiment of the test system of the present invention, and it can be seen that the test portion of the entire test system of this embodiment includes 24 sets of laser ranging sensors 1, all of which are horizontally arranged on one side of the runway in a direction parallel to the runway. The whole set of system is divided into two test areas according to the test requirements. The area 1 is divided into two parts which respectively correspond to an airplane landing grounding area and an airplane takeoff and landing area, the lengths of the two parts are 300m, the length of the two parts comprises most of fluctuation ranges of an airplane grounding point and a departure point, the grounding area is centered on T-shaped cloth (the T-shaped cloth is a reference mark of a grounding position when a pilot drives the airplane to land, the reference mark is generally arranged on one side of a runway which is about 200m away from the end of the runway, and the specific position of the landing area is determined by about 5m away from the edge of the runway in the left view direction of the pilot), the specific position of the landing area is determined according to the takeoff and landing condition of the airplane on site, because the speed of the part of the airplane is high, the flying posture is unstable, the transverse distribution of the wheel tracks is also violent, the arrangement of test equipment is also relatively dense, and each part of the area is provided with 7 laser ranging sensors at intervals of 50m.
The area 2 is a running area between two parts of the area 1, the length of the area is determined by the area 1, and the intervals of 10 groups of laser ranging sensors 1 are evenly distributed according to the actual length of the area 2.
The field operation of the laser distance measuring sensor 1 is schematically shown in fig. 3, which includes a left side view and a cross-sectional view. It can be seen from the figure that when no airplane passes through, the laser beam of the laser distance measuring sensor (1) should pass close to the highest point of the runway as much as possible (sectional view), and the data tested by the device is 0, which is also the part to be removed by the time synchronization and data processing unit (2). While the laser beam irradiation point should be concentrated on the lower edge of the tire of the airplane when the airplane passes through (left view).
The test of the test system of the invention:
1. the laser distance measuring sensors are arranged on one side of the runway in parallel, when an airplane passes by, the laser light speed returns through the airplane tire, and the recording sensor measures the distance L between the airplane tire and the sensors 1 According to L 1 And the distance L of the sensor from the center line of the runway 0 The offset L (formula shown below) of the plane relative to the central line of the runway can be obtained, and the distribution rule of the offsets is the transverse distribution of the wheel tracks of the plane on the section (figure 4);
L＝L 0 -L 1
2. recording all test data when the airplane passes through a certain laser sensor (1), and marking time parameters for effective test data through a time synchronization and data processing unit (2); the passing test data of the front wheel and the passing test data of the rear wheel of the airplane can be distinguished through the marked time parameters, and the mean value of the corresponding data time parameters is used as the time T of the front wheel and the rear wheel of the airplane passing the laser beam 1 ,T 2 (ii) a The velocity V of the aircraft passing the sensor can be estimated from the distance L between the front and rear wheels of the aircraft (the formula is shown below).
The test data of the multi-section wheel track transverse wheel track distribution, the distance parameter calibrated by the corresponding section and the airplane running speed parameter obtained by calculation are analyzed and processed in the computer (5), and the change rule of the airplane running process relative to the distance and the speed can be obtained
The invention also has the advantages that: the method for testing the transverse distribution of the wheel tracks in the prior art is improved, the practical problem that the transverse distribution of the wheel tracks of the airplane can change in the running process is fully considered, the transverse distribution of the wheel tracks of the airplane with multiple sections is tested, the change rule of the transverse distribution of the wheel tracks is analyzed, and the test result is more in line with the actual situation. When the change rule of the transverse distribution of the wheel tracks is analyzed, the reference factors of the two aspects of the airplane sliding speed and the airplane sliding distance are considered, so that the analysis of the change rule of the transverse distribution of the wheel tracks is more comprehensive.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.
Claims (4)
1. The utility model provides an aircraft wheel path transverse distribution changes rule test system which characterized in that: arranging a laser ranging sensor, a time synchronization and data processing unit, a power supply unit, a data storage unit and a computer on a runway, wherein:
the laser distance measuring sensor is mainly used for measuring the distance between the near-side tire and the laser testing unit when the airplane runs;
the time synchronization and data processing unit is used for screening the test data of the laser ranging sensor and marking all screened effective data with uniform time parameters;
the power supply unit provides power required by testing for the laser ranging sensor and the video unit;
the data storage unit is used for storing the data processed by the time synchronization and data processing unit;
the computer is used for carrying out later analysis processing on the data stored in the data storage unit at a specific time;
the runway is divided into two test areas, an area 1 is divided into two parts which respectively correspond to an airplane landing grounding area and an airplane takeoff and landing area, the lengths of the two parts are 300m, the grounding area takes a T-shaped cloth as a center, the specific position of the landing area is determined according to the situation that the airplane takes off and lands on site, and each part of the area is provided with 7 laser ranging sensors at an interval of 50m;
area 2 is the running area between the two parts of area 1, and the spacing of 10 groups of laser ranging sensors is evenly distributed according to the actual length of area 2.
2. The system for testing the transverse distribution change rule of the aircraft wheel track according to claim 1 is characterized in that: the laser ranging sensor is composed of a plurality of laser ranging sensors, and all the laser ranging sensors are arranged in a line in a direction parallel to the running direction.
3. The system for testing the transverse distribution change rule of the aircraft wheel track according to claim 1 is characterized in that: the data for screening the test data of the laser ranging sensor comprises data of the laser ranging sensor test when no plane passes and data with larger test error.
4. The system for testing the transverse distribution change law of the wheel tracks of an airplane as claimed in claim 1, comprising
The method comprises the following steps that firstly, according to the actual conditions of a test airport, including the length of a runway and the position factor of a power supply, a test system is reasonably arranged, the position of each laser test sensor in a laser test unit is calibrated, and the device is detected by starting up before formal test;
when an airplane passes by, the system can test the distance between the near-side tire of the airplane with different sections and the laser test unit and transmit test data to the time synchronization and data processing unit;
thirdly, the time synchronization and data processing unit screens the data transmitted by the laser testing unit and marks time parameters for the effective data according to the receiving sequence;
step four, after the time synchronization and data processing unit finishes processing, the data is led into the data storage unit for storage;
step five, repeating the step two to the step four until the test of the stage is finished;
and step six, importing the data in the data storage unit into a computer for checking to see whether to perform supplementary testing, and performing later analysis on the data in the computer if the data are checked to be correct.
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| CN201811539618.XA CN109444907B (en) | 2018-12-17 | 2018-12-17 | System and method for testing transverse distribution change rule of airplane wheel track |
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