JPS63189518A - Method for confirming finish time of compaction of ground - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a soil compaction machine driven by a motor, which is used to determine when the compaction state of the soil has been achieved, depending on the compaction state. The present invention relates to a method for identifying machine parameters by continuously monitoring them.

2. Prior Art In the known method of the type described above, the acceleration of a vibrating roller, which is a soil compaction roller, is measured as a machine parameter by means of an acceleration receiver. This corresponds to the actual value of the ground hardness determined, and allows the person in charge to know when the desired compaction state has been achieved.

The acceleration receiving device necessary for carrying out the known method together with the associated evaluation electronics forms a rather expensive and expensive device. The known device is therefore only suitable for large-scale installations.

OBJECTS OF THE INVENTION It is an object of the invention to be able to realize a method of the type mentioned at the outset in considerably simpler and cheaper means than the known methods and thus to be able to implement a method of the type mentioned at the outset using compact devices such as soil compaction plates, tampers or the like. By fixing the relative time changes in the motor output delivered for use in the device and the relative time changes based on the motor parameters that characterize the motor output, we I tried to verify it.

For this purpose, the method of the invention verifies only the relative time-based changes in the degree of compaction instead of the actual value of the soil hardness, expressed in the measured acceleration values compared to the known method. involves motor output as a mechanical parameter.

This is because the power output to the drive motor of the vibration generator depends on the firmness of the ground! [[E\1 increase/711
If the ground hardness does not change even when subjected to the action of the ground line abbreviation machine, the actual value of the ground hardness will not be a problem, and the time-based differential quotient will approach O. This is because it is clear from the applicant's experiments. For this purpose, it is possible to check and indicate when the maximum degree of compaction has been achieved given the conditions such as the soil compaction material, the soil compaction machine used, the given temperature in the soil, etc. Optical or acoustic This is possible with simple technical aids such as sending a signal. The subsequent work on the ground is regulated, since once the maximum degree of compaction has been reached, it is no longer possible to compact the ground further and, on the contrary, further work may cause the ground to loosen again, as is well known.

EMBODIMENTS Motors provide different parameters that can be simply measured in order to ascertain the motor output, such as, for example, delivered motor torque or motor drive torque, exhaust gas temperature and actual fuel consumption. Changes in the measured parameters are indicated, for example, as a needle deflection that changes with decreasing speed, and are evaluated by the personnel. In another advantageous embodiment of the invention, an optical or acoustic signal is generated when the time-based differential quotient of the motor output and the time-based differential quotient of the motor parameter value characterized as the motor output fall below a predetermined value. It is made to be. For signal processing, essentially simple, inexpensive, trouble-free and wear-free auxiliary components are sufficient for all signals.

The aforementioned auxiliary components which are convenient for carrying out the method of the invention are known to the person skilled in the art and are all available on the market, for example in the case of exhaust gas temperature measurement.

Since the costs required to implement the method of the invention in a soil compaction machine are low, it is suitable for small and medium-sized soil compaction devices, especially for vibrating plates. Of course, it can also be used for large machines as long as it confirms when the maximum ground compaction level has been reached.

Claims (1)

[Claims] 1. When performing work with a ground compaction machine driven by a motor, the time at which the ground compaction-completed state is obtained is continuously determined using machine parameters that depend on the compaction state. in a method for ascertaining by monitoring relative time-based changes in the delivered motor power and by measuring relative time-based changes in motor parameters characterizing the motor power; A method for verifying changes in the degree of compaction and confirming when soil compaction is complete. 2. Claim 1 continuously showing relative changes in motor output and motor parameters representing characteristics of the motor output
Method for confirming the end of soil compaction as described in Section 1. 3. The ground tightening system according to claim 1 or 2, wherein a signal is generated when a time-based differential quotient of a motor output and a motor parameter characterizing the motor output falls below a predetermined value. How to check when hardening is finished. 4. Delivered motor torque or motor drive torque;
Claim 1, which measures exhaust gas temperature or fuel consumption
How to check when the ground compaction is completed as described in section.