CN205280389U - Measure airborne equipment of aircraft tire decrement - Google Patents
Measure airborne equipment of aircraft tire decrement Download PDFInfo
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- CN205280389U CN205280389U CN201520939525.1U CN201520939525U CN205280389U CN 205280389 U CN205280389 U CN 205280389U CN 201520939525 U CN201520939525 U CN 201520939525U CN 205280389 U CN205280389 U CN 205280389U
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- laser displacement
- displacement sensor
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- angular transducer
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Abstract
The utility model provides a measure airborne equipment of aircraft tire decrement, includes laser displacement sensor, angular transducer and data acquisition system. Angular transducer is fixed in the laser displacement sensor surface, makes angular transducer's output be 0 to laser displacement sensor measuring displacement direction is perpendicular decurrent the direction of gravity, and when laser displacement sensor inclined, the angle of the relative the direction of gravity of this laser displacement sensor slope was unanimous with angular transducer measuring inclination. Simple measuring device and the method of invention utilization just can realize the precision measurement to installation state tyre collapsion volume to real time kinematic response curve that can the volume of obtaining the tyre collapsion. Accurate aassessment can be carried out to intensity, the life -span of tire operating condition to the data that the measurement obtained, provides believable experimental foundation for studying better aviation wheel and the tire of performance. The utility model discloses can use as the airborne equipment, whether break down shi yeke monitoring aircraft tire at the state of blowing out at aircraft tire pressure monitored control system.
Description
Technical field
The invention belongs to aircraft brake experimental technique, it is specifically related to a kind of airborne equipment measuring tire compression amount for airplane wheel when the state of installation in real time.
Background technology
Plane tyre draught calculates one of aircraft sliding race performance, decelerability, the sliding parameter running distance, sliding race time, absorption energy etc.
The measurement of plane tyre draught was generally all measured on wheel fatigue test board in the past, and wheel fatigue test board is that rigidity loads head for installing the loading head of wheel, directly measure the displacement loading head when measuring the draught of tire and just can directly measure the draught of tire. And for the wheel being arranged on landing gear, the existence of the cushion dashpot of complex structure is had due to landing gear, when loaded load, the compression of cushion dashpot and the compression displacement compound of tire, and the deformation of landing gear can allow the locus of wheel shaft, the angle of rotation of wheel shaft change so that traditional measuring method can only draw rough tire compression amount data.
For the measurement of tire compression amount, common several method has ink to draw the skill of handling needles, parallel-crank mechanism method, slip rocking arm method, mechanical arm method, line shift sensor method, high speed video process and laser displacement sensor method. Describing several method to tire compression measurement in landing gear falls shake test in " landing gear falls to shaking test tire compression amount technological overview " of " observation and control technology " the 32nd volume the 9th phase in 2013, wherein slip rocking arm method of masurement and the present invention have similar part. The slip rocking arm method of masurement that this paper is set forth, is the angle time history curve by measuring between rocking arm and test platform, then calculates wheel shaft vertical deviation time history in conjunction with rocking arm length (definite value). Owing to landing gear wheel shaft in compression process can produce course displacement, so the slide rail parallel with course is equipped with in the bottom of rocking arm, rocking arm can move around along horizontal concrete chute. And in reality is tested, along with the increase of aircraft load, landing gear causes the displacement of wheel shaft to be not only course displacement in compression process, also exist and the displacement on horizontal vertical direction, course, the error of measurement of angle in the described method which results in. Further, installing for needing level and need to be parallel to the slide rail in course, rise and fall in airplane wheel wheels-locked testing at band, what wheel pressed to is the circular arc face of the large inertia surface of tub wheel for simulating runway, can for the space installing horizontal concrete chute.
Chinese patent CN10212821 falls shake test tire compression amount and the image measuring method of axle displacement has set forth a kind of to fall the method for shake test tire compression amount for measuring landing gear: utilize the high-speed camera demarcated that mark point on wheel shaft is carried out high-speed camera, complete catching of the moving process digital picture to mark point, setting up system of coordinates after test and image coordinate is converted into physical coordinates, the physical coordinates obtaining wheel shaft is to converse the draught of tire. This method overcomes the drawback that traditional slip rocking arm method of masurement has measuring error, but hardware cost height, performance difficulty, and be not real-time measurement, the image data amount obtained during shooting is big, and during later stage software processes, algorithm is complicated, and workload is big.
Along with the development of aircraft, the performance requriements of aircraft improves constantly, take off and land hourly velocity and weight increases gradually, take off with landing mission in security issues become increasingly urgent, the requirement of tire be it is also proposed higher requirement, need accurately to measure, the dynamic changing curve of tire compression is even provided. The method of above-described measurement tire compression amount is all carry out at testing laboratory's environment, and the tire for installation state there is no feasible measuring method.
Summary of the invention
It is an object of the invention to, overcome the wheel wheels-locked testing that prior art can not adapt to installation state, it is provided that the airborne equipment of a kind of survey aircraft tire compression amount.
The present invention comprises laser displacement sensor, obliquity sensor and data collecting system. Described obliquity sensor is fixed on laser displacement sensor surface, when installing fixing, the output that must make obliquity sensor is 0 ��, and the sense of displacement that laser displacement sensor is measured is gravity direction vertically downward, when laser displacement sensor tilts, the angle that this laser displacement sensor relative gravity direction tilts is consistent with the angle of inclination that obliquity sensor is measured. The data output terminal of laser displacement sensor is connected by cable with the input terminus of data collecting system respectively with the data output terminal of obliquity sensor.
Plane tyre draught measuring apparatus of the present invention is as airborne equipment Real-Time Monitoring tire compression amount when aircraft landing is tested, utilize simple measuring apparatus and method just can realize the accurate measurement to installation state tire compression amount, and the Real-time and Dynamic response curve of tire compression amount can be obtained. Measuring the data obtained can be assessed accurately in the intensity of tire actual condition, life-span, the Inspection Aircraft Wheels better for research performance and tire provide believable test basis.
The present invention can use as airborne equipment, also can monitor whether plane tyre is in the state of blowing out when aircraft tire pressure monitoring system breaks down.
Accompanying drawing explanation
Fig. 1: tire compression measuring device front view;
Fig. 2: tire compression measuring device side-view.
Accompanying drawing code name illustrates:
1-landing gear; 2-wheel shaft; 3-laser displacement sensor; 4-obliquity sensor; 5-wheel tire; 6-runway; 7-data collecting system.
Embodiment
The present embodiment is the measuring apparatus of the plane tyre draught for measuring certain type ship-board aircraft landing test.
The plane tyre draught measuring apparatus of the present invention forms primarily of laser displacement sensor 3, obliquity sensor 4 and data collecting system 7.
Described obliquity sensor 4 is the pitch angle of survey sensor and gravity direction, it is fixed on laser displacement sensor 3 surface by jig, when installing fixing, the output that must make obliquity sensor is 0 ��, and the sense of displacement that laser displacement sensor 3 is measured is gravity direction vertically downward. During use, when laser displacement sensor 3 tilts, the angle of inclination that the angle that this laser displacement sensor relative gravity direction tilts measures 4 with obliquity sensor is consistent.
By the data output terminal of the data output terminal of laser displacement sensor 3 and obliquity sensor 4, input terminus with data collecting system 7 is connected by cable respectively.
During enforcement, described laser displacement sensor 3 is fixedly installed on wheel shaft by jig, and installation direction is that its Displacement Measurement direction is for vertically downward.
Described data collecting system 7 is conventional Portable Data-Acquisition System, for gathering laser displacement sensor 3 and the output of obliquity sensor 4 in real time, and converses tire compression value in real time.
During test, data acquisition unit 7 is positioned in aircraft cabin; Being fixedly installed on wheel shaft by laser displacement sensor 3 by jig, installation direction is that its Displacement Measurement direction is for vertically downward. By cable, laser displacement sensor 3, obliquity sensor 4 are connected with data acquisition unit 7.
During measurement, laser displacement sensor 3 wheel axle is to the distance L on ground, and obliquity sensor 4 measures the inclined angle alpha in laser displacement sensor 3 relative gravity direction on yaw plane.
The radius R of aircraft tire is given value. The axle height H=L*cos �� of wheel shaft, the draught �� R=R-L*cos �� of tire.
Claims (1)
1. the airborne equipment of a survey aircraft tire compression amount, it is characterized in that, comprise laser displacement sensor, obliquity sensor and data collecting system, described obliquity sensor is fixed on laser displacement sensor surface, when installing fixing, the output that must make obliquity sensor is 0 ��, and the sense of displacement that laser displacement sensor is measured is gravity direction vertically downward, when laser displacement sensor tilts, the angle that this laser displacement sensor relative gravity direction tilts is consistent with the angle of inclination that obliquity sensor is measured, the data output terminal of laser displacement sensor is connected by cable with the input terminus of data collecting system respectively with the data output terminal of obliquity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520939525.1U CN205280389U (en) | 2015-11-23 | 2015-11-23 | Measure airborne equipment of aircraft tire decrement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520939525.1U CN205280389U (en) | 2015-11-23 | 2015-11-23 | Measure airborne equipment of aircraft tire decrement |
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| CN205280389U true CN205280389U (en) | 2016-06-01 |
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| CN201520939525.1U Active CN205280389U (en) | 2015-11-23 | 2015-11-23 | Measure airborne equipment of aircraft tire decrement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504659A (en) * | 2020-05-06 | 2020-08-07 | 中国民航大学 | A multifunctional airport pavement single wheel test loading frame |
| CN117073981A (en) * | 2023-10-16 | 2023-11-17 | 中国飞机强度研究所 | Device and method for measuring optical movement of section of aircraft tire |
-
2015
- 2015-11-23 CN CN201520939525.1U patent/CN205280389U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504659A (en) * | 2020-05-06 | 2020-08-07 | 中国民航大学 | A multifunctional airport pavement single wheel test loading frame |
| CN117073981A (en) * | 2023-10-16 | 2023-11-17 | 中国飞机强度研究所 | Device and method for measuring optical movement of section of aircraft tire |
| CN117073981B (en) * | 2023-10-16 | 2024-01-09 | 中国飞机强度研究所 | Device and method for measuring optical movement of section of aircraft tire |
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| GR01 | Patent grant |