CN108931324A - A kind of strain wheel load and real-time heavy condition measuring system - Google Patents
A kind of strain wheel load and real-time heavy condition measuring system Download PDFInfo
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- CN108931324A CN108931324A CN201811097741.0A CN201811097741A CN108931324A CN 108931324 A CN108931324 A CN 108931324A CN 201811097741 A CN201811097741 A CN 201811097741A CN 108931324 A CN108931324 A CN 108931324A
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- undercarriage
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- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000003750 conditioning effect Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 239000011295 pitch Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 230000005484 gravity Effects 0.000 abstract description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/07—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing aircraft
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention relates to aircraft measurement calculating fields, disclose a kind of strain wheel load and real-time heavy condition measuring system.Including sensor-based system and measurement module, the sensor-based system includes wheel set sensor, each undercarriage of aircraft pitches ear position and pastes a wheel set sensor, the measurement module includes signal conditioning module, A/D conversion module, communication device and data acquisition computing module, the wheel set sensor connection signal conditioning module reconnects A/D conversion module, the vertical load of undercarriage wheel is calculated according to wheel load transducer calibration formula matrix for the digital signal of the A/D conversion module output, and the vertical load is connected to data by communication device and acquires computing module.The present invention can effectively determine undercarriage and ground contact state, can obtain the weight and center of gravity and aircraft load contents or store weight center of gravity condition of ground stationary state aircraft, be conducive to quickly being used in turn for aircraft.And measurement module is small in size, light-weight, convenient for flexibly placing.
Description
Technical field
The present invention relates to aircraft measurement calculating field, especially a kind of strain wheel load and real-time heavy condition measurement system
System.
Background technique
An important factor for aircraft wheel load sensor-based system is relationship flight safety.When aircraft takeoff, it is thus necessary to determine that wheel
Ground is left completely, into airflight state, can just pack up undercarriage, otherwise will lead to aircraft crash out of control；Aircraft drop
When falling, it is thus necessary to determine that wheel reliable contacts ground could be transferred to ground mode by aerial control model, so that aircraft is bowed and go forward side by side
Enter three skiddings and run state, reduce lift, establishes braking efficiency, or the anti-push-model of starting as early as possible, aircraft is made to slow down as early as possible.In the sky
Wheel load misconnection, which is led to or do not connected in time to ground, can all have serious consequences, the former will lead to aircraft crash out of control, and the latter is then
May cause aircraft cannot slow down in time, and the accidents such as gun off the runway.And the observation of unmanned vehicle nobody aboard, wheel load
The reliability of signal is particularly important.
Traditional wheel set sensor is mostly mechanical contact, and undercarriage contacts ground, after generating certain compression travel, machine
Tool switch connection, system show that wheel load signal is effective；When taking off, as lift increases, wheel reduces the pressure on ground, rises and falls
When frame compression travel is reduced to corresponding amplitude, wheel load signal is disconnected.Since undercarriage usually has assured result the requirement of damping energy-absorbing, need
To reach higher magnitude with the active force on ground could generate the compression travel of Crush trigger wheel load switch, and sensitivity is by very
Big limitation causes to connect in time when ground connection, and while taking off disconnects in advance, increases a possibility that accident occurs.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the above problems, a kind of strain wheel load and reality are provided
When heavy condition measuring system.
The technical solution adopted by the invention is as follows: a kind of strain wheel load and real-time heavy condition measuring system, including sensing
System and measurement module, the sensor-based system include wheel set sensor, each undercarriage of aircraft pitches ear position and pastes one
Set sensor is taken turns, the measurement module includes that signal conditioning module, A/D conversion module, communication device and data acquisition calculate mould
Block, the wheel set sensor connection signal conditioning module reconnect A/D conversion module, the number of the A/D conversion module output
The vertical load of undercarriage wheel is calculated according to wheel load transducer calibration formula matrix for signal, and the vertical load passes through logical
News device is connected to data acquisition computing module.
Further, the wheel set sensor using four Strain Meter Sets at wheatstone full-bridge circuit, rise and fall described
N number of profile position is selected in Jia Cha ear, the N is the natural number greater than 1, and the spacing between each profile position is 10mm,
One wheatstone full-bridge circuit is set in each section, using the wheatstone full-bridge electricity for the method choice work voted
Road.
Further, the measurement module further includes DC/DC power module, and the DC/DC power module will record voltage
Two kinds of voltages of 5VDC and 3VDC are converted into, are powered respectively to measurement module and wheatstone full-bridge circuit.
Further, the signal conditioning module uses difference amplifier.
Further, the communication device uses RS422 interface, and interval 10ms sends vertical to data acquisition computing module
Load.
Further, the measurement module is mounted on the side of undercarriage fork ear.
Compared with prior art, by adopting the above technical scheme have the beneficial effect that technical solution of the present invention using rising and falling
The deformation that Jia Cha ear position generates when loaded measures local dependent variable using strain gauge, determines the loaded state of undercarriage, have
Effect ground determines the contact condition of undercarriage and ground.Meanwhile in ground stationary state, each undercarriage institute on the ground can be obtained
The size of supported power can be quickly obtained in aircraft loading so as to obtain the weight of aircraft and the state of center of gravity in real time
Perhaps store weight center of gravity condition, determine counterweight demand and each flight fuel consumption, can the information such as volume read-out, be conducive to aircraft
Quickly it is used in turn.Secondly, signal conditioning module and the features such as small in size, light-weight A/D conversion module in measurement module, is convenient for
It flexibly is placed in wheel load sensor proximity, the voltage signal for taking turns set sensor output is converted into digital signal nearby, is improved whole
The anti-interference ability and measurement accuracy of a strain-type wheel load measuring system.Furthermore since strain gauge transducer dynamic response is fast, and
The time history of undercarriage wheel load during takeoff and landing can be obtained, thus can more delicately measure connecing for wheel and ground
Touching state obtains more reliable wheel load signal, effectively overcomes the deficiency of existing wheel load measuring method.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention strain wheel load and real-time heavy condition measuring system.
Fig. 2 is present invention wheel set sensor wheatstone full-bridge circuit figure.
Specific embodiment
The present invention is described further with reference to the accompanying drawing.
As shown in Figure 1, a kind of strain wheel load and real-time heavy condition measuring system, including sensor-based system and measurement module,
The sensor-based system includes wheel set sensor, each undercarriage of aircraft pitches ear position and pastes a wheel set sensor, described
It takes turns set sensor and wheel load sensor excitation is set, the measurement module includes signal conditioning module, A/D conversion module, communication dress
It sets and acquires computing module, the wheel set sensor connection signal conditioning module with data, the output signal for taking turns set sensor passes through
After signal conditioning module carries out conditioning amplification, it is transferred to A/D conversion module, the A/D conversion module converts it into digital letter
Number, the vertical load of undercarriage wheel is calculated according to wheel load transducer calibration formula matrix for the digital signal of output, described
Vertical load is connected to data by communication device and acquires computing module.Pass through the technical program: aircraft is in ground stationary state
When, the wheel load signal of whole undercarriages can be obtained, and act on the vertical load on whole undercarriage wheels, it is all vertical
The sum of load is the weight of aircraft at this time；According to the erect-position coordinate of undercarriage wheel, real-time aircraft can be obtained by operation
Position of centre of gravity；Similarly, aircraft load contents or store weight, center of gravity condition can also be quickly obtained, determine counterweight demand and
Each flight fuel consumption, can the information such as volume read-out, be conducive to quickly being used in turn for aircraft.
Preferably, it is illustrated in figure 2 the schematic diagram of wheatstone full-bridge circuit, the wheel set sensor uses four strain gauges
The wheatstone full-bridge circuit of (R1, R2, R3, R4) composition selects N number of profile position in undercarriage fork ear, and the N is
Natural number greater than 1, the spacing between each profile position are 10mm, and a wheatstone full-bridge electricity is arranged in each section
Road, if N takes 33 sections are arranged, use 3 selects the wheatstone full-bridge circuit of the 2 method choice work voted to improve wheel
Carry the reliability of measurement data.
Preferably, the measurement module further includes DC/DC power module, and on-board voltage is generally 28VDC, the DC/DC
Power module is converted into two kinds of voltages of 5VDC and 3VDC for voltage is recorded, and supplies respectively to measurement module and wheatstone full-bridge circuit
Electricity.
Preferably, the signal conditioning module carries out the conditioning of wheel load sensor voltage signal, differential amplification using difference amplifier
Device gain is 128 times (adjustable gain).A/D conversion module noiseless conversion accuracy 20, the sample frequency 100Hz(frequency
It is adjustable).Anti-aliasing filtering and digital filtering are carried out in sampling process, and carry out sampling and data pick-up (most using oversampling technique
Few 32 times of extractions).The sampled data exported each time is all by multiple repairing weld and to calculate acquisition, avoids " outlier " from occurring, mentions
The high reliability of data acquisitions.
The communication device uses RS422 interface, and interval 10ms sends vertical load to data acquisition computing module.It is above-mentioned
Process can obtain the time history of undercarriage wheel load during takeoff and landing.In this structure, entire measurement module contour dimension
For length × width × height=45mm × 20mm × 25mm, weight is not more than 0.150kg.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.If this
Field technical staff is altered or modified not departing from the unsubstantiality that spirit of the invention is done, should belong to power of the present invention
The claimed range of benefit.
Claims (6)
1. a kind of strain wheel load and real-time heavy condition measuring system, it is characterised in that: including sensor-based system and measurement module, institute
Stating sensor-based system includes wheel set sensor, each undercarriage of aircraft pitches ear position and pastes a wheel set sensor, the survey
Amount module includes signal conditioning module, A/D conversion module, communication device and data acquisition computing module, the wheel set sensor
Connection signal conditioning module reconnects A/D conversion module, and the digital signal of the A/D conversion module output is according to wheel set sensor
The vertical load of undercarriage wheel is calculated in calibration formula matrix, and the vertical load is connected to data by communication device and adopts
Collect computing module.
2. strain wheel load and real-time heavy condition measuring system as described in claim 1, it is characterised in that: the wheel load sensing
Device using four Strain Meter Sets at wheatstone full-bridge circuit, select N number of profile position in undercarriage fork ear, it is described
N is the natural number greater than 1, and the spacing between each profile position is 10mm, and a wheatstone full-bridge is arranged in each section
Circuit, using the wheatstone full-bridge circuit for the method choice work voted.
3. strain wheel load and real-time heavy condition measuring system as claimed in claim 2, it is characterised in that: the measurement module
It further include DC/DC power module, the DC/DC power module is converted into two kinds of voltages of 5VDC and 3VDC for voltage is recorded, respectively
It powers to measurement module and wheatstone full-bridge circuit.
4. strain wheel load and real-time heavy condition measuring system as claimed in claim 3, it is characterised in that: the signal condition
Module uses difference amplifier.
5. strain wheel load and real-time heavy condition measuring system as claimed in claim 4, it is characterised in that: the communication device
Using RS422 interface, 10ms is spaced to data acquisition computing module and sends vertical load.
6. strain wheel load and real-time heavy condition measuring system as described in claim 1 or 5, it is characterised in that: the survey
Amount module is mounted on the side of undercarriage fork ear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811097741.0A CN108931324A (en) | 2018-09-20 | 2018-09-20 | A kind of strain wheel load and real-time heavy condition measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811097741.0A CN108931324A (en) | 2018-09-20 | 2018-09-20 | A kind of strain wheel load and real-time heavy condition measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN108931324A true CN108931324A (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811097741.0A Pending CN108931324A (en) | 2018-09-20 | 2018-09-20 | A kind of strain wheel load and real-time heavy condition measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216612A (en) * | 2022-01-24 | 2022-03-22 | 中国商用飞机有限责任公司 | System and method for acquiring weight center of gravity of airplane passenger |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927833A (en) * | 2008-11-12 | 2010-12-29 | 霍尼韦尔国际公司 | Low cost aircraft center of gravity monitoring systems and methods |
| CN105628267A (en) * | 2014-10-31 | 2016-06-01 | 中国飞行试验研究院 | Pillar-type undercarriage vertical load measurement strain meter layout bridging method |
| CN105867281A (en) * | 2016-06-12 | 2016-08-17 | 哈尔滨工业大学 | Wireless monitoring system for aircraft running state |
| CN106404240A (en) * | 2015-10-14 | 2017-02-15 | 北京信息科技大学 | Undercarriage external load real-time monitoring method based on optical fiber grating sensor |
| CN208872438U (en) * | 2018-09-20 | 2019-05-17 | 四川腾盾科技有限公司 | A kind of strain wheel load and real-time heavy condition measuring system |
-
2018
- 2018-09-20 CN CN201811097741.0A patent/CN108931324A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927833A (en) * | 2008-11-12 | 2010-12-29 | 霍尼韦尔国际公司 | Low cost aircraft center of gravity monitoring systems and methods |
| CN105628267A (en) * | 2014-10-31 | 2016-06-01 | 中国飞行试验研究院 | Pillar-type undercarriage vertical load measurement strain meter layout bridging method |
| CN106404240A (en) * | 2015-10-14 | 2017-02-15 | 北京信息科技大学 | Undercarriage external load real-time monitoring method based on optical fiber grating sensor |
| CN105867281A (en) * | 2016-06-12 | 2016-08-17 | 哈尔滨工业大学 | Wireless monitoring system for aircraft running state |
| CN208872438U (en) * | 2018-09-20 | 2019-05-17 | 四川腾盾科技有限公司 | A kind of strain wheel load and real-time heavy condition measuring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216612A (en) * | 2022-01-24 | 2022-03-22 | 中国商用飞机有限责任公司 | System and method for acquiring weight center of gravity of airplane passenger |
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