Data processing arrangement and the operation mode thereof

A technology of a data processing device and a control device, which is applied in the registration/indication of vehicle operation, instruments, registration/instruction, etc., can solve the problems of tampering with records, large storage space, unpredictability, etc., and achieve the effect of reliable error formation

Inactive Publication Date: 2008-09-17
VDO AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty lies in distinguishing irregularities that may occur proportionally often from important errors that impair operational safety and may falsify records
Minor irregularities acting together may introduce important errors in results, whereas a unique record of open important errors does not necessarily induce graspability
On the other hand, it is not conceivable for a longer operation of a data processing device (in particular a tachograph), that is, to record all irregularities, which would require an unpredictably large memory space

Method used

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  • Data processing arrangement and the operation mode thereof

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Embodiment Construction

[0011] figure 1 A digital tachograph DTCO is shown, which has a sequence memory SEQ according to the invention as a component of the memory MEM. The tachograph DTCO comprises a control unit CPU, which generally regulates the sequence (or sequence) of the tachograph DTCO and in particular the reading and writing of the sequence memory SEQ. The sequence memory SEQ is composed of a ring memory RNG and a linear memory LIN. The ring memory RNG is written by the control unit CPU in such a way that if a complete registration has taken place, the respective oldest entry OER is overwritten by the respective latest entry NER. In the linear memory, multiple record items are continuously stored under the address, wherein the oldest record item OEL in the linear memory is at the low address, and the newest record item NEL in the linear memory is at the highest registered address. Multiple record items register different events E, which occur when each function module FM1, FM2 is running....

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Abstract

The invention relates to a data processing arrangement, in particular to a tachograph (DTCO) for a motor vehicle comprising a control device (CPU) and at least one memory (MEM). The aim of said invention is to better guarantee the traceability of an error arising during the data processing arrangement operation. According to said invention, at least one partial area of the memory (MEM) is embodied in the form of a sequence memory (SEQ) and a control device (CPU) is constructed in such a way that sequences of the data processing arrangement or of the tachograph (DTCO) are recorded in the sequence memory (SEQ), wherein the sequence memory (SEQ) is provided with at least one ring memory (RNG) which is organised in such a way an oldest input (OER) is overwritten by a new input (NER), respectively.; Said invention makes it possible to record a plurality of sequential events leading to a substantial error in the sequence memory (SEQ) in such a way the size of the memory (MEM) is increased within economically acceptable limits during a long operation of the arrangement.

Description

technical field [0001] The invention relates to a data processing device, in particular to a tachograph for a motor vehicle, which has a control device and a memory. Furthermore, the invention relates to a method for operating a data processing device of the type mentioned at the outset. Background technique [0002] Especially in tachographs, it is urgent to know the correct function curve changes and possible irregularities of the operation. In particular, this requirement is of particular importance in newer types of digital tachographs according to EWG-Regulation 3821 / 85, since digital records can be tampered with without leaving traces compared to analog records. The relevant regulations set wide-ranging measures with respect to the falsification of data which should have the character of legal evidence. The recording of the tachograph automatically minimizes changes in the speed profile over time. Certain events are stored in the digital mass memory of the tachograp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C5/00
CPCG07C5/085
Inventor 安德烈亚斯・林丁格霍斯特・纳特
Owner VDO AUTOMOTIVE
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