Horology: time measuring systems or devices – Combined with disparate device
Patent
1991-03-05
1993-10-12
Miska, Vit W.
Horology: time measuring systems or devices
Combined with disparate device
368107, 340438, 340459, 36442401, G04B 4700, G04F 800, B60Q 100
Patent
active
052532240
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method of recording time-related data, in particular data relating to the operation and driving of vehicles, using a system comprising data collecting means providing said time-related data and data recording means to be connectable thereto, in which at least the time-related data to be processed are autonomously recorded with the data recording means with the addition of time-related reference codes.
A method of this type is described, inter alia, in the British Patent Specification 2,119,095, the German Patent Specification 3,221,399 and the German Patent Application 3,221,398.
In practice it is necessary in certain cases to know not only the nature but also the time when events occurred. In road transport, for example, the relationship between the driving and rest times of a driver is legally specified in many countries. For a supervisory authority it is therefore necessary, inter alia, for example when a check is made, to know the driving and rest times of a driver over a certain period up to the time of the check. For a haulier, logistic journey data such as waiting times, stopovers, fuel consumption and the like are important operating parameters. To assess data relating to the operation of a vehicle it is also necessary to know the time certain events occurred, for example in order to be able to make an accurate analysis subsequently. In this context, it is possible to think, in particular, of data relating to the speed, acceleration, distance travelled, etc. in order to reconstruct, for example, events preceding an accident.
According to the prior art, the data recording means are provided for this purpose with an integrated electronic clock module having second, minute, hour and data functions for providing the true or absolute time. The data to be processed are then stored in the data recording means with the addition of a reference code derived from the true time. The clock modules have an adjustment input for synchronizing with a master clock. The master clock is preferably accommodated in data processing means so that whenever the content of the data recording means is processed, the time and the date of the clock module can simultaneously be synchronized in the data recording means.
The British Patent Application 2,015,208 discloses a system in which the data collecting means are provided with a clock module. Because the data collecting means are, however, situated in the vehicles, synchronizing the clock modules used can be a time-consuming event in large systems for which a separate master clock is necessary.
The method according to the prior art has a number of disadvantages. As already stated, the clock modules have to be regularly checked and synchronized with a master clock. An exact relationship between the recorded reference codes and the true time of occurrence or the true duration of events is dependent on correctly synchronized and correctly functioning clock modules. In practice it has furthermore been found that systems in which a clock module which can be influenced externally is used, which is a necessary requirement for synchronizing said clock modules in systems which operate with reference codes derived from the true time, are fairly susceptible to undesirable manipulations.
Via the external access to the clock module necessary for the synchronization with a master clock, the former can be influenced by, for example, adjusting the time indication in a manner such that certain data are recorded with reference codes differing from the true time or from the true duration of occurrence. This may produce a distorted picture of the true situation for an authority checking driving and rest times, a haulier etc.
The object of the invention is therefore in the first instance to improve the method mentioned in the preamble in a manner such that confusion in relation to the exact time and/or the duration of occurrence of events to be recorded is eliminated as far as possible. According to the invention, this is achieved in that the reference codes are generat
REFERENCES:
patent: 3792445 (1974-02-01), Bucks et al.
patent: 3864731 (1975-02-01), Callahan
patent: 3878371 (1975-04-01), Burke
patent: 3922649 (1975-11-01), Thome
patent: 3938092 (1976-02-01), Callahan
patent: 4067061 (1978-01-01), Juhasz
patent: 4072850 (1978-02-01), McGlynn
patent: 4179740 (1979-12-01), Malin
patent: 4188618 (1980-02-01), Weisbart
patent: 4258421 (1981-03-01), Juhasz et al.
patent: 4338512 (1982-07-01), Ludwig
Industrial Control Systems B.V.
Miska Vit W.
LandOfFree
Method and electrical system for recording and processing time-r does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and electrical system for recording and processing time-r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and electrical system for recording and processing time-r will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1911379