Boots – shoes – and leggings
Patent
1994-12-29
1997-08-19
Elmore, Reba I.
Boots, shoes, and leggings
364508, 361 23, G05B 1302
Patent
active
056594682
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method of monitoring and/or ascertaining respective changes in the operating condition of an electrically operated engine that occur due to stress, by measuring individual operating parameters or a plurality of operating parameters.
Particularly in rope pulley blocks or the like, loads that occur are divided into load ranges of different magnitude by means of a mechanical arrangement, wherein a counter is allocated to each load range which acquires or adds up the respective load time.
The purpose of this acquisition, registering and evaluating of weight loads during a certain load period of an engine is, inter alia, to achieve better operational safety with regard to product liability.
This known type of acquisition of operating parameters of the same kind is complex and not sufficient to allow for reaching a reliable result or making a statement regarding the actual operating condition and the future service life or the life expectancy of an engine.
SUMMARY OF THE INVENTION
Thus, it is the object of the present invention to create a method for monitoring and/or ascertaining respective changes in the operating condition of an electrically operated engine that occur due to use, by means of which the precision of the operating condition monitoring and of the acquisition of the operational data can be considerably improved or optimized in a cost-effective manner.
This object is solved according to the invention in that the acquired operating parameters are transferred to an electronic, non-volatile memory module.
In this manner, a more precise evaluation of the operating condition of an engine can be carried out, wherein both qualitative operating parameters, e.g., a maximum operating temperature reached, and quantitative operating parameters, - the operating time -, can be acquired.
Apart from the individual weight loads, the operating parameters concerned comprise, inter alia, the operating time during which the devices used for the method according to the invention are activated; the operating period during which an engine is working; the number of switching processes for driving an engine; the operating temperatures; the motor output of an engine, e.g., in the form of running periods of individual output ranges.
The method according to the invention proves to be particularly advantageous for measuring stresses of a mechanical or physical nature by acquiring the various influences that promote wear of the engine and by adding or converting them as wear contributions to form corresponding degrees of wear.
In this process, the wear contributions can be respectively converted to a uniform total degree of wear.
The method according to the invention can be used advantageously for measuring individual weight loads while taking the load period into consideration, during which process these stresses are added up, after having been converted to a corresponding wear contribution, when further influences that promote wear of the engine are acquired and, after conversion to a corresponding wear contribution, are added to the wear contributions which codetermine the degree of wear due to the weight loads.
In this manner, a more precise evaluation of the operating condition of an engine can be carried out.
Preferably, the number of switching processes or switching cycles influencing the wear of the engine or the switch-on load moments and switch-off load moments resulting therefrom can be acquired.
Furthermore, the conveying speed can be acquired as a value that increases wear of the engine and can be taken into account in the calculation of the transient wear contribution.
To improve the result of an evaluation of the operating condition of the engine, the acceleration and/or delay of the driving movement can be acquired and added to the existing degrees of wear after conversion to a wear contribution or to wear contributions.
The degree of wear of the engine can also be noticeably influenced by relatively high ambient temperatures, their volatility and/or the
REFERENCES:
patent: 4636962 (1987-01-01), Broyden et al.
patent: 5133465 (1992-07-01), Kalan
Elmore Reba I.
Garland Steven R.
Grapha-Holding AG
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