ISO 8721-2010 pdf free download

ISO 8721-2010 pdf free download.Road vehicles Measurement techniques in impact tests Optical instrumentation
VOhicules routiers — Techniques de mesure lors des essais de chocs — Instrumentation optique.
5.6.2 Type of procedure — Online
5.6.2.1 The online procedure is of the highest complexity. All work shall be done for every impact test.
The performance and the accuracy of the optical data channel can be checked during the test.
This procedure can be used, if the equipment of the optical data channel will often be changed essentially
between the impact tests, or if no prior information about the optical data channel is available.
The user has the possibility to evaluate every component of the optical data channel for every impact test.
5.6.2,2 Tasks during the impact test are specified below.
— All described performance and accuracy indices shall be calculated during the real impact test.
— All described performance index values shall be at least 0,5.
— The performance value of the optical data channel, Q, shall be greater than 0,7.
— The length measurement error of the optical data channel, L, shall be lower than the location accuracy, a.
— The accuracy value of the optical data channel, a, shall be lower than the accuracy value limit,
5.6.3 Type of Procedure — Offline
5.6.3.1 The offline procedure is of middle complexity. The main part of the calculation shall be done once in the preliminary test. The performance of the optical data channel can only be checked in this test. During the impact test, only the accuracy can be calculated. For a 3D analysis, the synchronism shall be checked.
This procedure can be used if the equipment of the optical data channel will not be changed, or if only minor changes will be done.
The user has the possibility to evaluate every component of the optical data channel once in the preliminary test. For every impact test, the user only has the possibility to evaluate the overall result of the optical data channel.
5.6.3.2 Tasks in the preliminary test are specified below.
— The lighting and the frame rates of the image reco-ding devices in the preliminary test shall be similar to an impact test. The using of a VDIIVDE 1634 Part 1 artefact is recommended (see Reference [2J). The size of the artefact should correspond to the size of the measuring area of the impact test.
— All described performance index values shall be at least 0,5.ISO 8721-2010 pdf free download.