DE19909516B4 - Method for making test data of a test procedure visible and test data acquisition evaluation system - Google Patents

Method for making test data of a test procedure visible and test data acquisition evaluation system

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Publication number
DE19909516B4
DE19909516B4 DE1999109516 DE19909516A DE19909516B4 DE 19909516 B4 DE19909516 B4 DE 19909516B4 DE 1999109516 DE1999109516 DE 1999109516 DE 19909516 A DE19909516 A DE 19909516A DE 19909516 B4 DE19909516 B4 DE 19909516B4
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DE
Germany
Prior art keywords
data
scene
test
memory
scene data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE1999109516
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German (de)
Other versions
DE19909516A1 (en
Inventor
Max Klasen
Bernhard Schick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tuv Sud Automotive GmbH
Original Assignee
TUEV SUED AUTOMOTIVE GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TUEV SUED AUTOMOTIVE GmbH filed Critical TUEV SUED AUTOMOTIVE GmbH
Priority to DE1999109516 priority Critical patent/DE19909516B4/en
Publication of DE19909516A1 publication Critical patent/DE19909516A1/en
Application granted granted Critical
Publication of DE19909516B4 publication Critical patent/DE19909516B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles

Abstract

Test data acquisition and evaluation system, containing
at least one measuring sensor (2a to 2f) mounted on a motor vehicle for detecting a test-relevant parameter of a test object (50),
a measured data memory device (8) for storing the output signals of the measuring sensor as measured data,
a vehicle-mounted device (10, 12) for non-contact detection of a test-relevant scene,
scene data storage means (18) for storing the scene data acquired by the device which is data corresponding to human perception
a perceptual means (32) for time-consciously visualizing the measurement data and the scene data, and characterized in that, under the control of an electronic control device (22, 30),
- adding to the measurement data and scene data timestamps,
- Controlling the storage of the measurement data in an electronic Meßdatenspeicher (8) and storing the scene data in an electronic scene data memory (18) is controlled, and
- The reading of the measured data from the measured data memory and the scene data from the scene data memory is controlled such that the measured data and the simultaneously ...

Description

  • The The invention relates to an experimental data acquisition and evaluation system according to the generic term of claim 1.
  • multichannel Experimental data acquisition and evaluation systems in which several measuring sensors recorded measurement data directly from, for example, a multichannel recorder or multichannel oscillographs be reproduced and / or stored so that they are time-synchronized are readable, have been for a long time known and represent a tool of modern experimental technology.
  • in the In view of the increasingly shorter development times due to competitive reasons, the demand for functional improvements and for weight reductions etc. comes the measuring technique an important meaning too. A peculiarity of the above, multichannel measuring technology is that, for example a test driver who tests a motor vehicle in the dialogue with the development engineer who evaluates experimental data records, from lack of detail memory or even from subjective illusion no longer the exact circumstances reminds that in the presence of a specific measurement data set on a past Test drive templates, for example, whether it is a specific strong curve along with a particular road condition, etc. acted. One Another problem with the known multi-channel measuring technique sometimes occurs, is that with the individual measuring sensors measured data in their synopsis are difficult to survey, so that a resulting overall picture with respect the state of a DUT in Details goes down.
  • From the DE 43 34 546 A1 is a movable measuring device for monitoring the transport conditions in general cargo handling known. The measuring device comprises a carrier body transported by the conveyor, on the one hand transducers for environmental parameters such as temperature, humidity or impact load are mounted and on the other hand distance sensors for detecting the distances between the support body and limiting investment components are attached. Finally, the carrier bodies have at least one image recording device for recording and storing image scenes of the surroundings of the measuring location reached at the respective measuring times. It is mentioned that, in addition, time information can be stored together with the acquisition and storage of image scenes and / or measured values in order to relate image scenes and / or measured values to one another in terms of time.
  • The DE 11 96 383 relates to a method and a device for recording an image sequence at the same time as recording the image content. The film used has a plurality of tracks, wherein a sequence of images is recorded on a track by a camera and signals are recorded synchronously on one or more other tracks.
  • Of the The invention is based on the object of providing an experimental data acquisition evaluation system create an improved data collection and accordingly a improved data interpretation.
  • The The object is achieved with the features of claim 1.
  • The claims FIGS. 2 to 5 are advantageous developments and embodiments of the experimental data acquisition and evaluation system directed.
  • The Invention can be used in a wide variety of metrological tasks. Particularly well, the invention is suitable for experimental use in the Vehicle development.
  • It be from at least one measuring sensor measurement data recorded, such as loads, temperatures, speeds etc. and in a measurement data memory saved. Next, a trial-relevant scene is detected and in Shape of scene data stored in a scene memory. there can the scene data trial-relevant images of an environment, a DUT, etc. be or can Sounds, be subjectively sensitive vibrations, etc.
  • If the scene data afterwards be evaluated synchronously with the measured data during the test evaluation, is an interpretation of the measured data in previously unknown manner possible, since the respective Meßdatenkollektiv can be assigned directly to the current scene. Both Scene data is preferably data associated with facilities detected become, for example, the human perception with a camera that corresponds to the eye, a vibration detection system, the subjectively perceived vibration behavior, for example the vibration impression corresponds to that of one on a seat sitting person, etc ..
  • The The invention will be described below with reference to schematic drawings, for example and explained in more detail.
  • It represent:
  • 1 a trial data collection and Evaluation system in the block diagram, which does not show all the features of the invention.
  • 2 a special embodiment of the system according to 1 , where some building blocks of the 1 omitted, and does not show all the features of the invention;
  • 3 an extended by a ring memory embodiment of the 2 having all the features of the invention, and
  • 4 - 7 different data waveforms.
  • According to 1 An experimental data acquisition and evaluation system has a plurality of measuring sensors 2a to 2e on that to an interface 4 connected via a data line 6 with a measuring data memory 8th connected is.
  • Next, the system has a camera 10 and a microphone 12 on that with an interface 14 connected via a data line 16 with a scene memory 18 connected is.
  • For controlling the reading of the data into the memories 8th and 18 serves a control unit 22 that via lines 24 . 26 and 28 with the interfaces 4 and 14 as well as with the memories 8th and 18 connected is. It is understood that the memory 8th and 18 can be combined into a single memory device.
  • The individual components of the various data acquisition system are ansich known in their construction and are therefore not explained in detail. With the data acquisition device can be controlled by the control unit of the measuring sensors 2a to f determined measurement data, the image data of the electronic camera 10 as well as from the microphone 12 detected ambient noise in the memories 8th and 18 store together with timestamps so that they from the memories 8th and 18 are readable in synchronous assignment. For this purpose, an evaluation system is provided that a memory device with a measured data memory 8th and a scene data store 18 contains. The same reference numerals are used because the data evaluation directly from the according to 1 left memory 8th . 18 can be done. The severed double arrow 30 symbolizes a data transmission path over which the measurement data and scene data via wire, infrared, electromagnetic or otherwise can be transferred from one memory to another, or simply symbolizes a way to the according to 1 left memory 8th . 18 can be transported.
  • For reading the measured data memory 8th and scene data storage 18 is a control unit 30 provided with the stored data time-synchronized and in parallel on a screen 32 are representable. reference numeral 34 and 36 denote data lines.
  • On the screen 32 is under control of the controller 30 a timeline 40 representable, over the time-synchronous from the measuring sensors 2 Recorded curves 42 and 44 as well as one from the camera 10 taken picture B in its assignment to a particular time on the timeline 40 are representable. Next, an unillustrated speaker for time-synchronized playback of the microphone 12 recorded noises may be provided.
  • The representation of a test procedure can be such that the traces run, for example, together with the timeline from right to left on the screen and in the image window of the camera 10 recorded sequence as a movie. The motion pictures can each be stopped, so that the collective of the measuring signals with the associated picture can be read for each time point.
  • It is understood that the system described can be modified in many ways. For example, the controllers 22 and 30 as well as the memory 8th and 18 and the screen 22 be summarized in a portable computer, for example, is housed in a test vehicle on which the sensors 2a to 2e , the camera 10 and the microphone 12 are housed. After the end of a test drive, the computer can be removed from the vehicle and is available for evaluation of the test and scene data to the test engineer stationary.
  • alternative can the data from a vehicle will be sent online to a store and stand there in a stationary complete evaluation facility or can be stored in memory, be brought to an experimental engineer for evaluation.
  • The following is based on 2 a special application of the method and the system for solving a complex task explained. For functionally identical components are in 2 the same reference numerals as in 1 used.
  • The data acquisition system with the measuring sensors 2a to 2f , the interface 4 , the measured data memory 8th , the control unit 22 , the interface 14 and the scene data memory formed as an image memory in this case 18 and the camera 10 is installed in a vehicle.
  • The sensors 2a to 2f and possibly other sensors detect, for example, the throttle position and the speed of an internal combustion engine, the speed of the vehicle, the vehicle on a wheel 46 Effective lateral force, longitudinal force and vertical force, etc. The measuring sensors detect this 2a to 2f all parameters and forces that influence the load, that of an axle steering point 48 as well as another Achsteilanlenkungspunkt 49 on a body part 50 Act.
  • The body part 50 comes with a light-transmitting coating 52 provided whose light characteristics are associated with a geometric change of the coating, such as a stress on the body part 50 and a concomitant change in shape, change. Such coating materials are available, for example from the company. Viskay as photoelastic materials for the PhotoStress ® process.
  • As is usual with stress-optical processes, this is the case with the coating 52 provided body part 50 from a light source 54 through a polarizing filter 56 illuminated by and that is from the body part 50 through the coating 52 through reflected light through another polarizing filter 58 through from the camera 10 added. That from the camera 10 captured image contains information about the load on the body part 50 , which in a known manner as a color strip in the image of the body part 50 to make noticable. With increasing deformation or tension, the color spectrum is repeated, so that at individual points the repetition of colors can be counted with increasing load and critical stress areas of the body part 50 and the principal directions of tension can be determined qualitatively and quantitatively.
  • When in the store 8th . 18 stored measurement data and image data on the screen 32 of the 1 For example, the lateral force acting on a wheel and the drive torque effective on the wheel can be displayed together with the time-synchronized video image of the body part, for example, synchronously with time. The measurement data and the associated video images can be changed as desired over time, interesting image sections can be zoomed, etc.
  • In a practical example, in which again and again cracks of the body part 50 occurred, it was quickly determined that a point weld in the body part was overloaded only when superimposing high drive torques with high lateral forces. In contrast to initial hypotheses, the evaluation showed that neither driving forces alone nor lateral forces alone led to overuse of the weld. Correspondingly, after analysis of the test results, the bodywork area could be adapted to the load spectrum occurring during vehicle life, and the deficiency occurring could be eliminated quickly.
  • With the system according to the invention is it possible in a simple way Immediately visualize the effect of remedies by: For example, an experimental program with a modified Car body part performed and the respective tension-optic images of the originating part and the modified one Partly time synchronous with the associated Meßdatenwerten be displayed on the screen.
  • It understands that the inventive system not only for data acquisition in the vehicle and then for stationary evaluation the data is suitable, but also applied directly to the test bench can be. Other applications the versatile and individually applicable method according to the invention, at the measurement data are recorded simultaneously with scene data, for example the time-synchronized representation of measured data with image information from a driver's cockpit and / or additional image information the driver's perspective, etc. In driving test, for example, the Road surface at the same time with load data or rolling noise of a tire, etc. shown become. It is understood that the Camera does not necessarily work in the visible range, but can also work in the IR or UV range. The perception the measuring and / or scene data can also be acoustic.
  • If the scene data is image data, the problem is that the image data requires a lot of storage space for longer test runs or test runs. To remedy this problem is the arrangement of 2 according to 3 further developed such that between the camera 10 or the associated interface 14 and the image data memory 18 a ring buffer 60 is provided with the interface 14 and the image data memory 18 via one data line each 62 and with the controller 22 via a control line 66 connected is. The ring buffer 60 serves the purpose of the camera 10 permanently store recorded image data, wherein the image data for one of the memory capacity of the ring memory 60 corresponding period of time each be deleted. On one of the controller 20 generated trigger signal is the contents of the ring memory 60 partially or completely in the image data memory 18 read in, so that in the image data memory 18 only previously selected, relevant image data are present.
  • The 4 to 7 For illustration, the different data streams represent, for example. Other formats, such as purely serial formats, etc., are also conceivable.
  • 4 shows the over the data line 6 current data stream from the measuring sensors 2a to 2f measured data generated by the control unit 22 controlled a clock channel t is associated with clock signals t n . It is understood that the clock signals can be assigned real-time signals.
  • 5 shows the over the data line 62 current image data with an image channel b and a clock channel t with the same clock signals as in the clock channel t of 4 ,
  • 6 shows an instant content of the ring memory 60 with an image sequence b n to b n +3 and associated clock signals t n to t n + 7 . It is through the camera 10 given frame rate in the example shown different from the frequency of the clock signals.
  • It is now assumed that the scene at time t n + 7 is particularly interesting. From the control unit 20 is then triggered, for example, by a test driver or test engineer, set a trigger signal T, for example, the current content of the ring memory 60 in the image memory 18 is read. Since then only one past image sequence is read in, it is advantageous to read in simultaneously with the trigger mark T a pretrigger mark T pr which determines the past time duration, the image data of which are read in, and to set a posttrigger mark T po which determines the time duration during which after setting the trigger mark T, the image data are read into the image memory.
  • 7 FIG. 2 shows the sequence of images which, upon triggering of the trigger mark T, lie between the trigger marks T pr and T po lying in the image data memory 18 be read.
  • With the ring buffer 60 is achieved in this way that in the image data memory 18 only the relevant image data are read in over a long trial period.
  • It understands that the Setting trigger triggers can depend on the test procedure and that, to save more space, all the techniques of modern computing, like data compression, saving only the different image data a sequence of pictures, etc. can be used. By the assignment of Clock signals to the measured data and the image data is guaranteed to be this each representable in their immediate temporal assignment are.

Claims (5)

  1. Test data acquisition and evaluation system, comprising at least one measuring sensor mounted on a motor vehicle ( 2a to 2f ) for detecting a test-relevant parameter of a test object ( 50 ), a measurement data storage device ( 8th ) for storing the output signals of the measuring sensor as measured data, a device attached to the motor vehicle ( 10 . 12 ) for non-contact detection of a test-relevant scene, a scene data storage device ( 18 ) for storing the scene data acquired by the device, which are data which, according to the human perception, is a perceptual device ( 32 ) for making the measurement data and the scene data perceivable in time, and characterized in that, under the control of an electronic control device ( 22 . 30 ), - time marks are added to the measurement data and the scene data, - the measurement data is stored in an electronic measurement data memory ( 8th ) and saving the scene data in an electronic scene data memory ( 18 ), and - the readout of the measurement data from the measurement data memory and the scene data from the scene data memory is controlled in such a way that the measurement data and the scene data taken simultaneously with them are perceptible on the perceptual device, and wherein between the scene detection device ( 10 . 12 ) and the scene data memory ( 18 ) a ring buffer ( 60 ) is provided, in which consecutively with clock signals (t n ) provided data are stored, and that the ring memory of the control device ( 22 ) can be controlled in such a way that its content is read in the scene data memory in response to a trigger signal T, wherein the control device ( 22 ) an input trigger signal (T pr ) and a post trigger signal (T po ) can be generated which determine the time duration of the scene data which is output to the scene data memory (T) in response to a trigger signal (T). 18 ) are read.
  2. Test data acquisition and evaluation system according to claim 1, characterized in that the detection device is a camera ( 10 ) and the perceptual device ( 30 . 32 ) a screen ( 32 ) on which the measured data ( 42 . 44 ) can be displayed synchronously with images (B) taken by the camera.
  3. Test data acquisition and evaluation system according to one of the preceding claims, characterized in that in the vehicle Measurement data memory ( 8th ), an image data storage ( 18 ) and a control unit ( 22 ), so that the measurement data and the image data can be stored in an identifiable manner in their temporal assignment.
  4. Test data acquisition and evaluation system according to one of the preceding claims, characterized in that measuring sensors ( 2a to 2d ) are provided for the acquisition of measured data, which are for the mechanical stress of a vehicle component to be examined ( 50 ) are relevant, that the vehicle component with a tension-optically effective coating ( 52 ) and that a light source ( 54 ) is provided which irradiates the component in such a way that from the component to the camera ( 10 ) radiated light changed with a change in the mechanical stress of the component.
  5. Test data acquisition and evaluation system according to claim 4, characterized in that between the light source ( 54 ) and the component ( 50 ) and between the component and the camera ( 10 ) each have a polarizing filter ( 56 . 58 ) is arranged.
DE1999109516 1999-03-04 1999-03-04 Method for making test data of a test procedure visible and test data acquisition evaluation system Expired - Fee Related DE19909516B4 (en)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
DE102004004137A1 (en) * 2004-01-28 2005-08-18 Zf Friedrichshafen Ag Data recording system has physical sensors and video camera with video relay switch connection to take images during sensor recording
DE102004043956A1 (en) * 2004-09-11 2006-03-16 Daimlerchrysler Ag Measurement arrangement for determining deformation of motor vehicle component e.g. steering wheel, has transponders to transmit their position-relevant data to transmitting-receiving units that acquire position relevant data for component
DE102008010628A1 (en) * 2008-02-22 2009-08-27 Daimler Ag Method for detecting diagnostic data in a motor vehicle by means of a volatile ring memory and subsequent data reduction in a non-volatile memory
DE102015121178A1 (en) * 2015-12-04 2017-06-08 Endress + Hauser Gmbh + Co. Kg Method for storing measured data packets in a field device

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Ältere Anmeldung, veröffenlicht als DE 199 44 223 A1

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