DE19909516A1 - Measurement data during course of experiment detecting enabling by storing test relevant scene data in scene memory and that the scene data and measurement data detectable in their temporal allocation - Google Patents

Measurement data during course of experiment detecting enabling by storing test relevant scene data in scene memory and that the scene data and measurement data detectable in their temporal allocation

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Publication number
DE19909516A1
DE19909516A1 DE1999109516 DE19909516A DE19909516A1 DE 19909516 A1 DE19909516 A1 DE 19909516A1 DE 1999109516 DE1999109516 DE 1999109516 DE 19909516 A DE19909516 A DE 19909516A DE 19909516 A1 DE19909516 A1 DE 19909516A1
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Germany
Prior art keywords
data
scene
measurement data
memory
evaluation
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.)
Granted
Application number
DE1999109516
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German (de)
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DE19909516B4 (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 Automotive Unternehm 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 Automotive Unternehm GmbH filed Critical Tuev Automotive Unternehm 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

A test data acquisition and evaluation system contains at least one measurement sensor (2a to 2f) for recording a test-relevant parameter of a test object (50), a measurement data memory (8) for storing the output signals of the measurement sensor as measurement data, and a perceptibility device (30, 32) for making the perceptible Measured data and is characterized by a device (10, 12) for contactless detection of a test-relevant scene, a scene data memory (18) for storing the scene data recorded by the device and a design of the perceptible device (30, 32) such that the measurement data together with the scene data can be perceived synchronously.

Description

The invention relates to a method for making measurement data of a Ver search procedure according to the preamble of claim 1. The invention further relates to Experimental data acquisition and evaluation system according to the preamble of the claim 2nd

Multi-channel test data acquisition and evaluation systems, in which of several Measurement data recorded by measurement sensors directly, for example, from a multi-channel recorder or multi-channel oscillographs are reproduced and / or stored in this way be that they can be read out synchronously, have long been known and set Tools of modern test technology.

In view of the shorter and shorter development times that For change after functional improvements and after weight reductions etc. comes the Measurement technology has an important meaning. A peculiarity of the above, multi-channel gene measurement technology is that, for example, a test driver driving a motor vehicle tried out, during the dialogue with the development engineer, the test data records evaluates, from lack of detailed memory or from subjective Deception no longer reminds of the exact circumstances that exist in the presence of a be agreed measurement data set on a previous test drive, for example whether it is a certain strong curve together with a certain road stood etc. acted. Another problem with the known multichannel measuring technology nik occasionally occurs, is that those measured with the individual measuring sensors Measurement data in their synopsis are difficult to survey, so that a result of the overall picture with regard to the state of a measurement object goes down in details.

The invention has for its object an improved in terms of evaluability To create methods of the type described in the introduction and a test data acquisition Evaluation system to create an improved data collection and accordingly enables an improved evaluation of data.

The part of the object of the invention relating to the method is characterized by the features of Claim 1 solved.

Thereafter, in the method according to the invention, at least one measuring sensor Measured data recorded, for example loads, temperatures, speeds etc. and stored in a measurement data memory. Next is a test relevant Scene recorded and stored in the form of scene data in a scene memory. Here can the scene data experimentally relevant images of an environment, a measurement object etc. or can be noises, subjectively perceptible vibrations, etc.

If the scene data is then synchronized with the measurement during the test evaluation data are evaluated, is an interpretation of the measurement data in previously unknown This is possible because the respective measurement data collective directly corresponds to the current scene can be assigned. The scene data is preferably data with Facilities are identified that correspond to human perception, for example with a camera that corresponds to the eye, a vibration detection system that a subjectively perceived vibration behavior, such as the Vibration impression corresponds to that felt by a person sitting on a seat that will, etc.

The part of the object of the invention relating to the system is characterized by the features of the An spell 2 solved.

Claims 3 to 10 are based on advantageous developments and embodiments of the  experimental data acquisition and evaluation system according to the invention directed.

The invention can be used for a wide variety of measurement tasks. Especially the invention is also well suited for trial use in vehicle development.

The invention is described below with reference to schematic drawings, for example and explained with further details.

They represent:

1 shows a test data acquisition and evaluation system in a block diagram;

FIG. 2 shows a special embodiment of the system according to FIG. 1, with some components of FIG. 1 being omitted;

Fig. 3 is a enlarged by a ring memory embodiment of Fig. 2 and

Fig. 4-7 different data waveforms.

Referring to FIG. 1, a Versuchsdatenerfassungs- and evaluation system, several measuring sensors 2 a to 2 e, which is connected to an interface 4 which is connected via a data line 6 with a measured data memory. 8

The system also has a camera 10 and a microphone 12 which are connected to an interface 14 which is connected to a scene memory 18 via a data line 16 .

A control device 22 is used to control the reading of the data into the memories 8 and 18 , which is connected to the interfaces 4 and 14 and to the memories 8 and 18 via lines 24 , 26 and 28 . It is understood that the memories 8 and 18 can be combined into a single memory block.

The structure of the individual components of the various data acquisition systems is known per se and is therefore not explained in detail. With the data acquisition device, under control of the control device, the measurement data averaged by the measurement sensors 2 a to f, the image data of the electronic camera 10 and the ambient noise detected by the microphone 12 can be stored in the memories 8 and 18 together with time stamps of the type that they are can be read out from memories 8 and 18 in synchronous assignment. For this purpose, an evaluation system is provided that contains a memory device with a measurement data memory 8 and a scene data memory 18 . The same reference symbols are used since the data evaluation can take place directly from the memory 8 , 18 on the left in FIG. 1. The severed double arrow 30 symbolizes a data transmission path over which the measurement data and scene data can be transmitted from one memory to the other via wire, infrared, electromagnetic or otherwise, or which simply symbolizes a path by which the memory on the left in FIG. 1 8 , 18 can be transported.

For reading the measurement data memory 8 and the scene data memory 18 , a control device 30 is provided, with which the stored data can be displayed in synchronism and in parallel on a screen 32 . Reference numerals 34 and 36 denote data lines.

On the screen 32 , under the control of the control unit 30, a time bar 40 can be displayed, via which the measurement curves 42 and 44 recorded by the measurement sensors 2 and an image B recorded by the camera 10 are synchronized in their assignment at a respective point in time on the time bar 40 can be represented. Furthermore, a loudspeaker, not shown, can be provided for the time-synchronous reproduction of the noises picked up by the microphone 12 .

A test sequence can be represented in such a way that the measurement curves run, for example, together with the timeline from right to left across the screen and the image sequence recorded by the camera 10 is shown as a film in the image window. The motion pictures can be stopped so that the collective of the measurement signals with the associated picture can be read at any time.

It is understood that the system described can be modified in many ways. In example, the control units 22 and 30 and the memory 8 and 18 and the screen 22 can be combined in a portable computer, which is housed, for example, in a test vehicle on which the sensors 2 a to 2 e, 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 to the test engineer to evaluate the test and scene data.

Alternatively, the data can be sent online from a vehicle to a memory and are available there in a stationary complete evaluation system or can, stored in memory, be brought to a test engineer for evaluation become.

A special application of the method according to the invention or the system for solving a complex task is explained below with reference to FIG. 2. For functionally identical components, the same reference numerals are used in Fig. 2 as in Fig. 1.

The data acquisition system with the measuring sensors 2 a to 2 f, the interface 4 , the Meßda tenspeicher 8 , the control unit 22 , the interface 14 and in this case as a scene data storage trained scene data memory 18 and the camera 10 is installed in a vehicle.

The sensors 2 a f to 2 and optionally other sensors detect, for example, the throttle position and the speed of an internal combustion engine, the speed of the vehicle, the effective on a vehicle 46 side force, force in the longitudinal direction and force in the vertical direction, etc .. To detect the measuring sensors 2 a to 2 f all parameters and forces that influence the load, which act on a body part 50 from an axle part articulation point 48 and a further axle part articulation point 49 .

The body part 50 is provided with a light-permeable coating 52 , the light properties of which change with a geometric change in the coating, for example with a stress load on the body part 50 and an accompanying change in shape. Such coating materials are offered, for example, by Viskay as photoelastic materials for the Photostress ® process.

As is customary in voltage-optical methods, the body part 50 provided with the coating 52 is illuminated by a light source 54 through a polarization filter 56 and the light reflected from the body part 50 through the coating 52 is reflected through a further polarization filter 58 by the camera 10 taken on. The image recorded by the camera 10 contains information about the load on the body part 50 , which can be recognized in a manner known per se as color stripes in the image of the body part 50 . With increasing deformation or tension, the color spectrum repeats itself, so that the repetition of colors can be counted at increasing points with increasing load and critical stress areas of the body part 50 and the main stress directions can be determined qualitatively and quantitatively.

If the measurement data and image data stored in the memory 8 , 18 are shown on the screen 32 of FIG. 1, the lateral force acting on a wheel and the drive torque acting on the wheel, for example, can be displayed together with the time-synchronized video image of the body part. The measurement data and the associated video images can be changed as required in terms of time, interesting image sections can be zoomed, etc.

In a practical example, in which cracks in the body part 50 repeatedly occurred, it could quickly be determined that a spot weld in the body part was overloaded only when high drive torques with high lateral forces were superimposed. In contrast to initial hypotheses, the evaluation showed that neither driving forces alone nor lateral forces alone led to excessive stress on the weld seam. Accordingly, after analysis of the test results, the body area could be adapted to the stresses occurring during a vehicle's life and the deficiency that occurred was quickly eliminated.

With the system according to the invention it is possible in a simple manner to directly Visualize the effect of remedial measures, for example by using a test pro gram is carried out with a modified body part and the respective span optical images of the original part and the modified part synchronized with the time associated measurement data values are displayed on the screen.

It is understood that the system according to the invention is not only for data acquisition while driving stuff and then suitable for stationary evaluation of the data, but also immediately bar can be used on the test bench. Other uses of the vielsei tig and individually applicable method according to the invention, in which the measurement data the same For example, the time-synchronized Dar are recorded in time with scene data Provision of measurement data with image information from a driver's cockpit and / or additional cher image information from the driver's perspective etc. In driving tests, for example the road surface simultaneously with stress data or rolling noises Tire etc. are shown. It goes without saying that the camera is not mandatory in the visible range must work, but can also work in the IR or UV range. The The measurement and / or scene data can also be made audible.  

If the scene data is image data, the problem arises during long test drives or test runs that the image data require a large amount of storage space. To remedy this problem, the arrangement of FIG. 2 according to FIG. 3 is further developed in such a way that a ring memory 60 is provided between the camera 10 or the associated interface 14 and the image data memory 18 , which is connected to the interface 14 and the image data memory 18 One data line 62 each and is connected to the control unit 22 via a control line 66 . The ring memory 60 serves to permanently store the image data recorded by the camera 10 , the image data being deleted after a period of time corresponding to the storage capacity of the ring memory 60 . To a signal generated by the control device 20 trigger signal, the contents of the ring is completely read in space indicated 60 in part or in the image data memory 18, so that only preselected, relevant image data is present in the image data memory 18th

FIGS. 4 to 7 are for explaining the different data streams, for example. There are also other formats, for example, purely serial formats, etc. are conceivable.

FIG. 4 shows the data stream running over the data line 6 of the measurement data generated by the measurement sensors 2 a to 2 f, to which a clock channel t with clock signals t n is assigned, controlled by the control unit 22 . It is understood that real-time signals can be assigned to the clock signals.

FIG. 5 shows the image data running over the data line 62 with an image channel b and a clock channel t with the same clock signals as in the clock channel t of FIG. 4.

FIG. 6 shows an instantaneous 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 . The image repetition rate given by the camera 10 in the example shown is different from the frequency of the clock signals.

It is now assumed that the scene at time t n + 7 is particularly interesting. The control device 20 then triggers, for example, a test driver or test engineer, sets a trigger signal T, upon which, for example, the current content of the ring memory 60 is read into the image memory 18 . Since only a previous image sequence is then read in, it is advantageous to read in a pretrigger mark T pr at the same time as the trigger mark T, which determines the previous time period, the image data of which is read in, and to set a post trigger mark T po that defines the time period true, during which, after setting the trigger mark T, the image data are read into the image memory.

FIG. 7 shows the sequence of images which are read into the image data memory 18 when the trigger mark T is triggered between the trigger marks T pr and T po .

In this way, the ring memory 60 ensures that only the relevant image data are read into the image data memory 18 over a long test period.

It goes without saying that the trigger marks are set automatically from the course of the experiment can hang, and that, in order to save further storage space, all techniques of modern Da processing, such as data compression, only storing the different image data an image sequence, etc. can be used. By assigning the clock signals to The measurement data and the image data is guaranteed to be in their immediate vicinity temporal assignment can be represented.

Claims (10)

1. Method for making measurement data of an experimental procedure perceptible,
the method by which measurement data are recorded and stored in a measurement data memory, from which the measurement data are read to make them perceptible,
characterized in that
a scene relevant to the experiment is recorded without contact and scene data are stored, and
that the scene data and the measurement data are made perceptible in their temporal assignment.
2. Test data acquisition and evaluation system, containing
at least one measuring sensor ( 2 a to 2 f) for detecting a test-relevant parameter of a test object ( 50 ),
a measurement data memory ( 8 ) for storing the output signals of the measurement sensor as measurement data,
a perceptibility device ( 32 ) for making the measurement data perceptible, and
a control device ( 22 , 30 ) for controlling the operation of the measurement data memory and the perceptibility device,
marked by
a device ( 10 , 12 ) for contactless detection of a scene relevant to testing,
a scene data memory ( 18 ) for storing the scene data recorded by the device and a design of the control device ( 22 , 30 ) such that measurement data can be perceived synchronously with the scene data on the perceiving bar device ( 30 , 32 ).
3. experimental data acquisition and evaluation system according to claim 2, characterized in that between the scene detection device ( 10 , 12 ) and the scene data memory ( 18 ) a ring memory ( 60 ) is provided, in which data provided with clock signals (ta) are stored continuously , And that the ring memory from the Steuerein direction ( 22 ) can be controlled such that its content is read in response to a trigger signal T in the scene data memory.
4. experimental data acquisition and evaluation system according to claim 3, characterized in that from the control device ( 22 ) a pre-trigger signal (T pr ) and a post trigger signal (T po ) can be generated, which determine the duration of the scene data, which is based on a trigger signal (T ) can be read into the scene data memory ( 18 ).
5. Experimental data acquisition and evaluation system according to claim 3 or 4, characterized in that the time-synchronous perception of the measurement data and the scene data is ensured by clock signals assigned to them (t n ).
6. Experimental data acquisition and evaluation system according to one of claims 2 to 5, characterized in that the acquisition device includes a camera ( 10 ) and the perceptibility device ( 30 , 32 ) contains a screen ( 32 ) on which the measurement data ( 42 , 44 ) can be represented synchronously with images taken by the camera (B).
7. experimental data acquisition and evaluation system according to claim 6, characterized in that the at least one measuring sensor ( 2 a to 2 e) and the camera ( 10 ) are attached to a motor vehicle.
8. experimental data acquisition and evaluation system according to claim 7, characterized in that in the vehicle a measurement data memory ( 8 ), an image data memory ( 18 ) and a control unit ( 22 ) are housed, so that the measurement data and the image data in their temporal assignment identifiable Way are storable.
9. Test data acquisition and evaluation system according to one of claims 7 or 8, characterized in that
that measuring sensors ( 2 a to 2 d) are provided for recording measurement data which are relevant for the mechanical stress of a vehicle component ( 50 ) to be examined,
that the vehicle component is coated with an optically effective coating ( 52 ) and
that a light source ( 54 ) is provided which irradiates the component in such a way that the light emitted by the component onto the camera ( 10 ) changes when the mechanical stress on the component changes.
10. experimental data acquisition and evaluation system according to claim 7, characterized in that between the light source ( 54 ) and the component ( 50 ) and between the component's and the camera ( 10 ) each have a polarization filter ( 56 , 58 ) is provided.
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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Cited By (4)

* Cited by examiner, † Cited by third party
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
WO2009103387A1 (en) * 2008-02-22 2009-08-27 Daimler Ag Method for capturing diagnostic data in a motor vehicle by means of a volatile ring buffer 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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DE1196383B (en) * 1961-05-29 1965-07-08 Bach Auricon Inc Method and apparatus for receiving an image sequence together with a record of the picture content signals associated
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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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