The acoustic sensor is a sensor which is able to receive, analyze and interpret both body and airborne sound signals. On the basis of these data, the sensor can perform various switching operations for example monitoring of machines, plants and tools.
|Acoustic testing technology||
Testing technology based on acoustic methods which can perform the monitoring of quality parameters in assembly and production plants. Through the evaluation of the recorded sound signals on changing parameters the production process can be influenced.
|Acoustical quality assurance|
|Acoustical sorting of small components||
The acoustical sorting of small components is based on the resonance analysis from natural frequencies of mechanical structures. Thereby a frequency measurement (resonances) of the emitted sound signals is performed after an impulse-like stimulation of the test object. This frequency spectrum is compared with already trained sound patterns for sorting components. As a result of this comparison a directly good / bad statement is generated to discharge faulty parts.
Acoustics are dealing with the generation and propagation of sound and its technical applications. It describes the propagation of mechanical vibrations and waves in solid, liquid and gaseous media.
|Airborne sound, structure-borne sound||
There are two different types of sound signals: airborne and structure-borne noise.
For airborne sound, the sound spreads through the medium air. For structure-borne sound, the sound waves spread in solids.
Please see "Intelligent sensor"
Frequency analysis examines how often certain events occur within a certain time period or how much specific frequency components are present in a signal.
Monitoring of the operation of a facility or equipment with regard to the provisions, without recourse to special measurements. Verification whether products and systems provide their services in accordance with their specifications.
An intelligent sensor is a sensor which combines besides the actual measured values, also the complete signal conditioning and signal processing in a case.
The material testing is used for quality control and assurance. It is checked if a produced lot of preliminary, intermediate or finished products corresponds to the required quality standard.
Please see „Acoustic testing”
Continuous monitoring and verification of the status of a unit and analysis of records to ensure that specified requirements are met.
The quality test detects, if products and services comply with the specific predetermined parameters and characteristics. It is used to determine to what extent e.g. the product meets the quality requirements.
If a system under all operating conditions can react properly and in time to all events that occur real-time capability is given.
The resonance analysis is the investigation of the resonance that occurs when a vibration-capable body is excited to vibrations by an applied periodic external force.
The sound analysis is a procedure whereby assemblies can be controlled while using their vibrational behavior or sound by the recording of body-or airborne sound.
The object that has to be tested is driven at idle or under load and the resulting body or airborne sound is captured. By a mechanical vibration a modified behavior or a change in sound signature is produced. Faultless test objectst hereby serve as a reference.
The term "sound detection" means the analysis and comparison of one or more frequencies with a given sound pattern.
Different frequencies with no particular frequency ratio within a spectrum are recorded, analyzed and compared with reference samples as a nominal value.
The sound testing or analysis is a method of material testing for the detection of fissures as well as material and structural defects. The frequency spectrum includes frequencies in the audible and also in the ultrasonic range. The characteristic natural frequency of a rigid body is modified by material errors, so that the results of the measurements can be compared and evaluated with the previously learned vibrational behavior of fault-free components as the nominal value.