Road structure – process – or apparatus – Process
Patent
1994-03-17
1995-05-16
Neuder, William P.
Road structure, process, or apparatus
Process
40413305, E01C 1930
Patent
active
054154944
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method according to a method for determining and displaying the soil compaction attained by working with a soil compacting device.
Soil compacting devices are in general operated with a constant position of the supply control lever, i.e., of the lever controlling the supply of energy.
It is known to monitor a motor parameter that reflects on the load condition of the motor for a real time determination and real time display of the degree of soil compaction attained during working with a soil compacting device, and to convert the parameter to a corresponding electrical signal. Suitable operating parameters for combustion engines in this context are, for example, the torque transmitted by the motor shaft and the load condition of the motor.
The direct determination of the corresponding operating parameters with good precision, especially within the most interesting final range of the desired degree of compaction, however has been difficult in the past and required a great constructive expenditure.
Today, compacting devices are commonly driven by motors which are provided with a protective rpm limiting device.
It is an object of the invention to provide a method of the aforementioned kind which can be performed with relatively small constructive expenditure and which provides very exact results especially in the final range of the desired soil compaction, that is in s range where the decision has to be made whether to cease further soil compaction.
SUMMARY OF THE INVENTION
The method of determining and displaying during operation an actual degree of soil compaction achieved with a soil compacting device according to the present invention is primarily characterized by the following steps: providing a protective rpm limiting circuit; the predetermined maximum rpm limit is surpassed; and impulse as a base value for a display value of the actual degree of compaction.
In another embodiment of the present invention a method of compacting large areas of identical soils with a soil compacting device is presented and primarily characterized by the following steps: large area to be compacted to a desired degree of compaction; by providing a protective rpm limiting circuit; when the predetermined maximum rpm limit is surpassed; ignition impulse as a base value for a display value of the actual degree of compaction; reference value for the compaction of the remaining portions of the large area to be compacted; be compacted; and large surface area to be compacted when the display value of the actual degree of compaction reaches the reference value.
Preferably, the reference value is saved and displayed constantly together with the display value of the actual degree of compaction.
Advantageously, for determining the reference value in step b) the soil is compacted to a maximum attainable degree of compaction.
The control parameter for the control system, respectively, the degree of its activity, are no direct operating parameters of the motor, however, they reflect the actual load condition of the motor especially at the end of the compaction operation of a soil area currently being compacted in a very exact manner and can be converted in an especially simple manner into a corresponding electric signal.
DESCRIPTION OF PREFERRED EMBODIMENTS
The invention will be explained in the following with the aid of the drawing representing two embodiments in connection with soil compacting devices which are driven by external auto-ignited combustion engines.
It is shown in: FIG. 1 a device for performing the inventive method in connection with an external auto-ignited drive motor by sensing the ignition impulses of a rpm-limited drive motor, and
FIG. 2 a device for performing the method in connection with an external auto-ignited drive motor that is prevented from surpassing the maximum rpm value by delaying the ignition impulse.
DESCRIPTION OF PREFERRED EMBODIMENTS
In the drawing only the electronic ignition circuit with the parts driven by the motor are schemat
REFERENCES:
patent: 4411081 (1983-10-01), King
patent: 5109730 (1992-05-01), Zahn et al.
Neuder William P.
Wacker-Werke GmbH & Co. KG
LandOfFree
Process for determining and indicating the degree of ground comp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for determining and indicating the degree of ground comp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for determining and indicating the degree of ground comp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-634106