CN108592904A - A kind of vehicle movement parameters measuring system - Google Patents
A kind of vehicle movement parameters measuring system Download PDFInfo
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- CN108592904A CN108592904A CN201810039750.8A CN201810039750A CN108592904A CN 108592904 A CN108592904 A CN 108592904A CN 201810039750 A CN201810039750 A CN 201810039750A CN 108592904 A CN108592904 A CN 108592904A
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- movement parameters
- vehicle movement
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- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims description 2
- 230000001133 acceleration Effects 0.000 abstract description 10
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 35
- 238000009434 installation Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The present invention discloses a kind of vehicle movement parameters measuring system, include being connected by USB RS 232 data lines for the data acquisition device of collection vehicle exercise parameter and with data acquisition device to carry out the computer of vehicle movement parameters data processing and display in real time, the data acquisition device includes shell and the accumulator being placed in shell, serial ports relay module, micro inertial measurement unit；Accumulator is connect with the serial ports relay module, and the serial ports relay module is connect with the micro inertial measurement unit；The micro inertial measurement unit is connected by RS422 RS 232s module with control/data-interface terminal, the control/data-interface terminal is connect by the USB RS 232s data line with the computer, and the serial ports relay module is connected with control/data-interface terminal.The present invention is based on the acceleration analyses of micro inertial measurement unit to avoid the error generated by speed judges that vehicle running state terminates.
Description
Technical field
The present invention relates to vehicle movement parameters field of measuring technique, and in particular to a kind of vehicle movement parameters measuring system.
Background technology
Longitudinal movement acceleration, speed and the displacement of vehicle can be the test of the chassis subsystem performances such as braking, transmission, skill
Art situation judging and fault diagnosis provide important foundation, are that must survey parameter (due to three in vehicle test and performance detection
Between there are calculous relation, common speed represents), longitudinal (also known as pitching), yaw acceleration and angular acceleration are and vehicle
The closely related exercise parameter of control stability.It is now widely used for the non-contact vehicle speedometer of photo-electric of automobile test and lacks
Vehicle body or bumper in number experiment still in the fifth wheel instrument used, use by holder or sucker outside tested vehicle
On, common feature is the distance change amount of cooling water of units of measurement time, cannot directly export acceleration signal, and installs complicated, difficulty,
Even the vehicle for being easy installation also wants half an hour, some vehicles are difficult to install, and curved surfaces vacuum cup is difficult to reliably
Installation needs to make special stand, and fifth wheel instrument has to install using holder.
Coasting test, braking ability test etc. are needed to judge the test event that vehicle running state terminates, generally all
It is zero as Rule of judgment using speed, i.e. vehicle speedometer compares its value with zero while detecting instantaneous velocity, if be equal to
Zero is judged as off-test, otherwise continues detection speed and adds up operating range and time.Since vehicle running state terminates
When, under the action of rebound power, vehicle body can all generate shaking, although vehicle no longer travels forward (wheel phase this moment
For road surface), but the shaking of vehicle body makes velocity sensor still and has the signal of interval to export, and vehicle speedometer is caused to think vehicle not yet
Stop and continue to sample, cause to measure bigger than normal possibly even seriously affects measuring accuracy away from discrete time.
Fifth wheel instrument precision when speed is more than 90km/h can significantly reduce, and measurement range is limited and road pavement flatness requirement
It is higher；Under photo-electric vehicle speedometer low speed test, repeatability precision is poor, environmental suitability is poor, be in from 2~180km/h errors
It is non-linear it is difficult correct, brake, slide, Standing start accelerated test measuring accuracy it is relatively low.Two kinds of vehicle speedometer weight and size compared with
Greatly, the rapidly change procedure more than 0.6g cannot effectively be measured.Existing longitudinal direction (also known as pitching), yaw acceleration and angle add
Velocity measuring device, including follow-on photo-electric vehicle speedometer, all use GPS module, be easy to be masked in signal, interfere and
There is the occasion that concealment requires to be not suitable for using.In certain special remote locations, the quick test for carrying out vehicle performance is needed,
It is required that test device is small and exquisite, easy for installation, environmental suitability is strong, does not have to GPS module.
Invention content
The purpose of the present invention is be directed to vehicle movement parameters measuring system in the prior art cannot meet simultaneously it is light it is small and exquisite,
The problem of quick for installation, without GPS module, and a kind of vehicle movement parameters measuring system is provided.
The technical solution adopted to achieve the purpose of the present invention is：
A kind of vehicle movement parameters measuring system, include for collection vehicle exercise parameter data acquisition device and with
The data acquisition device is connected by USB RS 232 data lines to carry out vehicle movement parameters data processing in real time and show
The computer shown, the data acquisition device include shell and accumulator, serial ports relay mould in the shell
Block, micro inertial measurement unit；The accumulator is connect with the serial ports relay module, the serial ports relay module with it is described
Micro inertial measurement unit connects, and the serial ports relay module is used to receive the control for the RS232 formats that the computer is sent
Instruction, control relay are attracted and then control micro inertial measurement unit on/off；The micro inertial measurement unit passes through RS422
RS 232 module is connected with control/data-interface terminal, and the control/data-interface terminal passes through the USB RS 232s
Data line is connect with the computer, and the serial ports relay module is connected with the control/data-interface terminal.
The shell be equipped with accumulator charging hole, power switch, battery charge indicator, power switch indicator light,
Mode indicating lamp, synchronization/Alt key indicator light.
The data acquisition device is mounted on the data for data acquisition device to be mounted on to car body corresponding site and acquires
On appliance stand.
The accumulator uses lithium polymer storage battery.
The computer is portable computer.
When simultaneously using two data acquisition devices, one of them is main data acquisition device, another is from number
According to harvester, synchronous or two kinds of data acquisition modes of alternating can be used with from data acquisition device in the master data collection device
Carry out data acquisition.
Vehicle movement parameters measuring system of the present invention, it is light-weight, small, installation site is flexible, easy for installation；Based on micro-
The acceleration analysis of Inertial Measurement Unit avoids the error generated by speed judges that vehicle running state terminates.
In addition, the data acquisition device of the present invention can be used with single cpu mode, two-shipper can also be used synchronous or alternately made
With pattern the application to engineering practice value of test data is improved to reduce test environment requirement.
Description of the drawings
Fig. 1 is the schematic diagram of the vehicle movement parameters measuring system under single cpu mode.
Fig. 2 is the internal structure schematic diagram of data acquisition device.
Fig. 3 is the appearance schematic diagram of data acquisition device.
Fig. 4 is the schematic diagram of vehicle movement parameters measuring system under Dual OMU Servers Mode.
Fig. 5 is the control flow block diagram of computer.
In figure：1. data acquisition device, 2. data acquisition device holders, mounting portion of 3. data acquisition devices in car body
Position, 4. portable computers, 5.USB RS 232 data lines, 6. shells, 7. accumulator charging terminals, 8. power switches, 9. controls
System/data-interface terminal, 10. battery charge indicator, 11. power switch indicator lights, 12. mode indicating lamps, 13. synchronizations/
Alt key indicator light.
Specific implementation mode
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Referring to shown in Fig. 1-3, a kind of vehicle movement parameters measuring system, including one for collection vehicle exercise parameter
Data acquisition device 1 and it is connected to carry out vehicle in real time by USB RS 232s data line 5 with the data acquisition device
The portable computer 4 of exercise parameter data processing and display.
The portable computer, processing and display for carrying out data in real time.
Wherein, the data acquisition device includes shell 6, accumulator, micro inertial measurement unit, RS422 RS 232 moulds
Block, serial ports relay module；The power switch of working condition of the shell equipped with accumulator charging terminal 7, to control accumulator
8, control/data-interface terminal 9, battery charge indicator 10, power switch indicator light 11, mode indicating lamp 12 are (with difference
Color indicate different mode), synchronization/Alt key indicator light 13 (being indicated with different colours)；
Wherein, the accumulator is lithium polymer storage battery, the respectively micro inertial measurement unit of data acquisition device
With other elements or module for power supply.
The RS422 RS 232 modules, for being converted to the RS422 output data formats of micro inertial measurement unit
RS232 output data formats, and portable meter is transmitted to through USB RS 232 data lines by the control/data-interface terminal
The processing of calculation machine.
The serial ports relay module, the RS232 lattice sent to data acquisition device for receiving portable computer
The control instruction of formula, control relay are attracted and then control micro inertial measurement unit on/off.
The test data of data acquisition device micro inertial measurement unit is transmitted to just by the USB RS 232s data line
Formula computer is taken, and portable computer can also be sent the serial ports relay mould that instruction is sent to data acquisition device
Block controls the action of the relay of serial ports relay module.
Well known device may be used in the micro inertial measurement unit, such as RIU820 digital inertia measuring units,
The structures such as 3 MEMS gyroscopes, 3 mems accelerometers are internally integrated, it can be achieved that 3 tie up the survey of angular speed, 3 dimension acceleration
Amount or other general micro inertial measurement units.But selected micro inertial measurement unit should meet specific measure the item
Environmental suitability require and measurement accuracy requirement, and answer small volume and less weight, measurement data exported by RS422 interfaces in real time.
Further, also data acquisition device holder 2, exists for data acquisition device 1 mounted on data acquisition device
At the installation position 3 of car body.
In the present invention, the data acquisition device can be one, be used as single machine, as described in above embodiment,
Also two data acquisition devices are can be used simultaneously, Dual OMU Servers Mode is constituted and uses；Wherein, Dual OMU Servers Mode includes synchronous and two kinds of alternating
Data acquisition modes.Concrete structure is as shown in Figure 4.
The computer, for controlling test process and data receiver, preservation, processing, generation and display curve, showing
Show main calculation results.
The computer can provide acquisition and start/finishing control, data receiver, preservation, processing, generation and display song
Line shows that the basic function of main calculation results can write corresponding software system according to specific test event in actual use
System, to realize better human-computer interaction, data processing and display.
As shown in figure 5, computer can realize the parameter configuration to Inertial Measurement Unit by its parameter configuration module, lead to
Its test process control module is crossed to realize the start-up operation of control Inertial Measurement Unit and be stopped, gathered data；Pass through its number
The data of Inertial Measurement Unit are read according to operation module, and are converted to initial data, cache and calculate test data, display number
Value, real-time curve is shown after starting gathered data；After test stops, by its file operation module creation file, deposit caching
In initial data and calculated test data, preserve curve as needed, and can read in multiple raw data files or
Test data file average etc. further calculating, and generates and shows curve.
Measuring system installation steps are：
Under single machine use pattern, after test vehicle meets test condition, data are acquired by data acquisition device holder
Device is mounted on data acquisition device in the installation position of car body, and portable computing is connected to using USB RS 232 data lines
Machine；
Under two-shipper use pattern, after test vehicle meets test condition, respectively will by two data acquisition device holders
Two data acquisition devices are mounted on the installation corresponding site of car body, are connected to using two USB RS 232 data lines portable
Computer.
Measuring system test operating procedure is：Into portable computer system, parameter configuration is carried out (such as setting baud
Rate, selection synchronization/alternate mode, set the alternate cycle etc. of alternate mode), it is preserved after confirmation.Open data acquisition device electricity
Source switch clicks start button in computer system interface, starts vehicle and starts to test, and shows that speed etc. is believed substantially in interface
Breath, cooperation vehicle testing operation, in the condition for having agreement, such as while reaching regulation speed or acceleration, clicks acquisition button,
Start to show real-time curve, and cache test data, stop button is clicked when meeting test termination condition or the EOT end of test.It can be with
Establishment file preserve initial data, test data, real-time curve, the initial data that can also be tested to leapfrog test or repeatedly or
Test data average etc. further calculating, and generates and shows curve.
Beneficial effects of the present invention are as follows：
1. system weight is light, small, installation site is flexible, easy for installation.
2. the acceleration analysis based on micro inertial measurement unit avoids by speed judgement vehicle running state terminates
The error of generation.
3. data acquisition device can reduce test environment requirement using two-shipper synchronization or when pattern is used alternatingly, improves and survey
Try the application to engineering practice value of data.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of vehicle movement parameters measuring system, which is characterized in that include the data acquisition for collection vehicle exercise parameter
Device and it is connected to carry out vehicle movement parameters number in real time by USB RS 232 data lines with the data acquisition device
According to the computer of processing and display, the data acquisition device includes shell and accumulator, string in the shell
Mouth relay module, micro inertial measurement unit；The accumulator is connect with the serial ports relay module, the serial ports relay
Module is connect with the micro inertial measurement unit, and the serial ports relay module is used to receive the RS232 that the computer is sent
The control instruction of format, control relay are attracted and then control micro inertial measurement unit on/off；The micro-inertia measuring list
Member is connected by RS422 RS 232s module with control/data-interface terminal, and the control/data-interface terminal passes through described
USB RS 232s data line is connect with the computer, the serial ports relay module and the control/data-interface terminal phase
Connection.
2. vehicle movement parameters measuring system as described in claim 1, which is characterized in that the shell charges equipped with accumulator
Hole, power switch, battery charge indicator, power switch indicator light, mode indicating lamp, synchronization/Alt key indicator light.
3. vehicle movement parameters measuring system as described in claim 1, which is characterized in that the data acquisition device, which is mounted on, to be used
In by data acquisition device be mounted on car body corresponding site data acquisition device holder on.
4. vehicle movement parameters measuring system as described in claim 1, which is characterized in that the accumulator is stored using lighium polymer
Battery.
5. vehicle movement parameters measuring system as described in claim 1, which is characterized in that the computer is portable computing
Machine.
6. vehicle movement parameters measuring system as described in claim 1, which is characterized in that while being acquired using two data
When device, one of them is main data acquisition device, another be from data acquisition device, the master data collection device with from
Data acquisition device can be used synchronous or alternately two kinds of data acquisition modes carry out data acquisition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810039750.8A CN108592904A (en) | 2018-01-16 | 2018-01-16 | A kind of vehicle movement parameters measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810039750.8A CN108592904A (en) | 2018-01-16 | 2018-01-16 | A kind of vehicle movement parameters measuring system |
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| CN108592904A true CN108592904A (en) | 2018-09-28 |
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| CN106403944A (en) * | 2016-09-28 | 2017-02-15 | 顺丰科技有限公司 | Inertial measuring device and motion control equipment |
| CN207894427U (en) * | 2018-01-16 | 2018-09-21 | 中国人民解放军陆军军事交通学院 | A kind of vehicle movement parameters measuring system |
-
2018
- 2018-01-16 CN CN201810039750.8A patent/CN108592904A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119144A (en) * | 2005-11-04 | 2006-05-11 | Asia Air Survey Co Ltd | Road linearity automatic survey device |
| CN1912545A (en) * | 2006-08-25 | 2007-02-14 | 北京航空航天大学 | Low cost, small volum plate micro-inertial measuring system based on MEMS |
| CN101598555A (en) * | 2008-06-04 | 2009-12-09 | 中国科学院自动化研究所 | Micro-inertia measuring device based on the ZigBee wireless singlechip |
| KR101105606B1 (en) * | 2011-07-29 | 2012-01-18 | (주)원지리정보 | The method and apparatus of topographical map data with movement multi sensor moudle |
| CN102506871A (en) * | 2011-11-28 | 2012-06-20 | 北京航空航天大学 | Airborne double-fiber IMU (inertial measurement unit)/DGPS (differential global positioning system) integrated relative deformation attitude measurement device |
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Application publication date: 20180928 |