KR930004892B1 - Actual load measurement system - Google Patents

Abstract

The system comprises a transformer (10) for converting boom, arm and bucket cylinder displacements into electrical signal, a pressure meter (11) for converting boom, arm and bucket cylinder pressures into electrical signal, a tachometer (12) for converting the turning angle of structure into electrical signal, an inclinometer (13) for converting inclined angles into electrical signal, a vibrometer (14), data collecting means (15) and data handling means (16). The data handling means includes a D/A converting means (19) connected to the data collecting means (15), a recording means (20) connected to a means (19), a computer (17) connected to the means (15), a printer connected to the computer (17).

Description

Actual load measurement system

1 is a measurement point display diagram for displaying the actual load of the excavator.

2 is a block diagram showing an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: boom cylinder 2: arm cylinder

3: bucket cylinder 4: upper turning angle measuring part

5: tilt angle measuring part 6 tilt angle measuring part

10: displacement gauge 11: pressure gauge

12: tachometer 13: inclinometer

14 vibrometer 15 data collection unit

16 data processing unit 17 computer

18: printer 19: D / A converter

20: register

The present invention relates to a real load measurement system, and more particularly, to a real load measurement system for comprehensively measuring the state of change of various physical quantities generated during heavy operation of heavy equipment.

Conventionally, as a method of measuring the stress acting on the structure of heavy equipment such as an excavator during actual work, the strain gauge is attached to the surface of the structure to measure and analyze the strain variation of each point, and then indirectly loads through the analyzed stress variation. Analysis could be carried out, but it was impossible to grasp the shape, direction, size and behavior of heavy equipment.

Therefore, the present invention has been made to solve the above problems, the position of the work system, the hydraulic cylinder pressure, the rotation state and position of each frame, the angle before and after the necessary for comprehensive load analysis for use as technical data during design The purpose is to provide a real load measurement system for analyzing and testing the size, shape, direction, etc. of loads according to the equipment behavior during actual work by measuring the back.

In order to achieve the above object, the present invention provides a displacement gauge for converting a boom cylinder displacement, an arm cylinder displacement and a bucket cylinder displacement into an electrical signal, an boom cylinder pressure, an arm cylinder pressure, and a bucket cylinder pressure in an actual load measuring system. Pressure gauge for converting the motor into an electrical signal, a rotation system for converting the turning angle of the upper structure into an electrical signal, an inclinometer for converting the front, rear, left and right tilt angles into an electrical signal, a vibration meter for converting the vibration into an electrical signal, the displacement gauge, the pressure gauge, the rotation system, the inclinometer and Data collection means connected to the vibrometer to amplify the electrical signal and converts the actual measurement data into output data, and data processing means connected to the data collection means for outputting the test measurement data.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows measurement points for analyzing the actual load. In the drawing, 1 is a boom cylinder, 2 is an arm cylinder, 3 is a bucket cylinder, 4 is an upper pivot angle measurement site, 5 is a front and rear tilt angle measurement site, and 6 is a left and right tilt angle measurement site.

The boom cylinder (1), the arm cylinder (2) and the bucket cylinder (3) measure the displacement and pressure, and the rotation angle of the upper part of the structure is measured at the upper turning angle measurement site (4) shown in the figure. Incidentally, the front, rear, left, and right tilt angles are measured at the front, rear, left, and right tilt angle measuring portions 5 and 6.

2 is an overall block diagram showing an embodiment of the present invention. In the figure, 10 is displacement gauge, 11 is pressure gauge, 12 is tachometer, 13 is inclinometer, 14 is vibrometer, 15 is data collection part, 16 is data processing part, 17 is computer, 18 is printer, 19 is D / A converter, 20 is Indicates a recorder.

Displacement of the boom cylinder, arm cylinder and bucket cylinder (1, 2, 3) is converted into an electrical signal by the displacement gauge 10, the pressure of the boom cylinder, arm cylinder and bucket cylinder (1, 2, 3) is a pressure gauge (11 Is converted into an electrical signal. In addition, the rotation angle of the upper structure is converted into an electrical signal by the rotation system 12, the front and rear inclination angle and the left and right inclination angle by the inclinometer 13, and the vibration by the vibration system 14, respectively.

Through the data collector 15 connected to the displacement gauge 10, the pressure gauge 11, the rotometer 12, the inclinometer 13, and the vibrometer 14, minute electrical signals are measured with measurable measurement data. The measurement data of the data collection unit 15 is transmitted to the data processing unit 16 and output as actual test measurement data. The data is stored in the computer 17 connected to the data collection unit 15 or the data is transferred to the printer 18. Pull out. The data collection unit 15 is configured by using an existing data acquisition unit (IC).

In addition, the D / A converter 19 connected to the data collecting unit 15 outputs a data signal to the recorder 20, that is, an oscilloscope, so as to analyze the change in physical quantity and obtains 24VAC obtained from the test equipment. To power the entire system.

The present invention constructed and operated as described above has the following effects.

First, the test evaluation criteria can be established by checking the actual load.

Second, the design elements are corrected and applied by analyzing the actual loads due to inertia and impact forces.

Third, clear equipment behavior and load characteristics can be analyzed.

Fourth, to improve the technology of accelerated fatigue test of the structure by the simulation load condition research and development.

Claims (2)

In the actual load measuring system, a displacement gauge 10 for converting boom cylinder displacement, arm cylinder displacement, and bucket cylinder displacement into an electrical signal, and a pressure gauge for converting the boom cylinder pressure, the arm cylinder pressure, and the bucket cylinder pressure into an electrical signal ( 11), the rotation system 12 for converting the rotation angle of the upper structure into an electrical signal, the inclinometer 13 for converting the front, rear, left and right tilt angles into an electrical signal, the vibration system 14 for converting vibration into an electrical signal, the displacement meter ( 10), a data collector 15 connected to the pressure gauge 11, the tachometer 12, the inclinometer 13, and the vibrometer 14 to amplify an electrical signal and convert the measured data into actual analyzeable measurement data. And a data processing means (16) connected to the unit (15) for outputting the test measurement data. The data processing means (16) according to claim 1, wherein the data processing means (16) comprises: D / A converting means (19) connected to the data collecting means (15), recording means (20) connected to the D / A converting means (19), and And a computer (17) connected to the data collection means (15) and a printer (18) connected to the computer (17).

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