Analysis of the subsidence behavior of a test object

• US 20050021251A1
• Filed: 03/24/2004
• Published: 01/27/2005
• Est. Priority Date: 09/24/2001
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Mueller, Klaus-Dieter, Voelkel, Thomas
• Application Number:
  US10/807,324
• Publication Number:
  US 20050021251A1
• Time in Patent Office: Days
• US Class Current: 702/57
• CPC Class Codes: G01N 2203/001 Impulsive
• CPC Class Codes: G01N 2203/0039 Hammer or pendulum
• CPC Class Codes: G01N 2203/0083 Rebound strike or reflected energy
• CPC Class Codes: G01N 2203/0688 Time or frequency
• CPC Class Codes: G01N 2291/015 Attenuation, scattering
• CPC Class Codes: G01N 29/045 by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks measuring resonant frequency G01H13/00; measuring strength properties by application of mechanical stress G01N3/00
• CPC Class Codes: G01N 29/28 providing acoustic coupling , e.g. water impedance matching G10K11/02
• CPC Class Codes: G01N 3/30 by applying a single impulsive force, e.g. by falling weight

Abstract

A system for the automatic signal recording and for evaluation of the decay behavior of a test object following a mechanical impulse excitation. The system includes a coupling element (3) coupled to sensors (2, 13), which detect oscillations of the test object (24) and which convert the detected oscillations to analog oscillatory impulses. The system is further provided with an amplifier (5) adapting the amplitude of the analog oscillatory impulses, a low-pass filter (6) provided for avoiding aliasing effects, an analog to digital converter (7) converting the analog oscillatory impulses to digital data and an arithmetic unit (8) for oscillation analysis and evaluation of the data. The coupling element (3), the amplifier (5), the low-pass filter (6), the analog to digital converter (7) and the arithmetic unit (8) are combined in a compact mobile unit (1) and are connected in series to one another.

Claims

1. A system for automatic signal recording and analysis of the subsidence behavior of a test object after a mechanical pulse excitation, comprising:

a coupler to sensors that are provided for detecting vibration of the test object and converting the detected vibration into analog vibration signals;

an amplifier configured to adjust the amplitude of the analog vibration signals;

a low-pass filter configured to at least reduce aliasing effects in the analog vibration signals;

an analog-to-digital converter configured to convert the analog vibration signals into digital signals; and

a computer configured to analyze the vibration and to evaluate the digital signals;

wherein the coupler, the amplifier, the low-pass filter, the analog-to-digital converter and the computer are combined in a compact mobile unit in a series connection, and the sensors are integrated into the compact mobile unit.

2. The system according to claim 1, further comprising at least one of a digital input and a digital output as a connection from the computer to a mechanism for mechanical pulse excitation of the test object.

3. The system according to claim 2, wherein the computer is configured to control the mechanical pulse excitation of the test object via the mechanism.

4. The system according to claim 1, further comprising at least one power supply configured to supply power to the sensors.

5. The system according to claim 1, further comprising a communications interface connecting the computer to an external operator control and monitoring system.

6. The system according to claim 1, further comprising at least one of a digital input and a digital output as a connection from the computer to an external automation device.

7. The system according to claim 1, wherein at least one operator control and monitoring element is integrated into the compact mobile unit.

8. The system according to claim 1, wherein the computer is an adaptive system.

9. An integrated mobile unit, comprising:

at least one sensor configured to detect mechanical vibrations of a test object into electrical signals;

a signal processor configured to produce digital evaluation signals in accordance with the electrical signals;

a computational component configured to analyze the evaluation signals with respect to a vibrational subsidence of the mechanical vibrations of the test object;

wherein the sensor, the signal processor and the computational component are integrated into the mobile unit and together form a series connection.