SAEU3H user manual
220Pages

INSTRUCTION MANUAL SAEU3H Digital AE Testing System QingCheng AE Institute (Guangzhou) Co., Ltd

Copyright and warranty QingCheng AE Institute (Guangzhou) Co., Ltd reserves all rights to the contents of this manual. It is not allowed to copy, transmit or adapt the contents of this manual without the written consent of our company. Unauthorized use of the information in this manual may result in civil litigation. Our company will not inform users of any changes to the contents of the manual. We do not guarantee the quality, accuracy and applicability of the manual. The company will not be responsible for any damage caused by the fallacy of this manual, whether direct or indirect, and...

Preface Overview of SAEU3H acoustic emission system With the continuous development of communication interface between computer and peripherals, data communication technology is constantly updated in the instruments with computer as data processing and display equipment. PCI bus interface data acquisition system based on desktop PC used to be the most widely used data acquisition system, but now it has been replaced by high-performance USB communication interface data acquisition system of desktop or notebook PC. Qingcheng AE Institute (Guangzhou) Co., Ltd.(Previous company name: Beijing...

parallel detection channels, each channel is composed of similar measurement components, signal processing units, calculation programs and complete peripheral components, and is composed of powerful computers. Each channel measuring component mentioned here includes acoustic emission sensor, preamplifier and acquisition board. SAEU3H digital acoustic emission detection system can sample and display acoustic emission waveform and parameter signal in real time, so it can fully meet various application requirements of field and laboratory (based on waveform data analysis and characteristic...

• The maximum data transmission rate of 600MB / s continuous waveform data and 1.2 million sets / s continuous characteristic parameter data can be realized; • Program controlled optional analog filter and program-controlled digital filter with arbitrary settings have powerful functions Characteristics of Acquisition Board • Each board has 4 independent channels, each channel is 10MHz, with 16bit precision; • Each channel has 3 kinds of high pass and 3 kinds of low-pass filters, model. Butterworth, or user-defined combination mode; • The range of multi -gear input is adjustable, ± 10V, ±...

Part 1 Acoustic Emission Hardware

1. Technical Background 1.1. Brief Introduction of Acoustic Emission Acoustic emission (AE) is the phenomenon of transient elastic wave generated by the rapid release of energy from local sources in materials, sometimes also known as stress wave emission. The detection method by receiving and analyzing the acoustic emission signal to evaluate the material performance or structural integrity is called acoustic emission testing technology. The deformation and crack propagation of materials under stress are important mechanisms of structural failure. The source directly related to deformation...

1.2. Main Purpose of Acoustic Emission Testing • The location of acoustic emission source shall be determined • Analyze the properties of acoustic emission source • Determine the time and load of AE occurrence • Assess the severity of acoustic emission sources 1.3. Characteristics of Acoustic Emission Testing The discovery of each AE source means the application of AE system. The AE testing method is different from other conventional NDT methods in many aspects: • It is a dynamic detection method. The detected energy comes from the object itself, not from the detection instrument; • It is...

1.4. Application of Acoustic Emission Technology • At present, acoustic emission technology has been applied in many fields, including the following aspects: • The petrochemical industry • The power industry • Material test • Civil Engineering • The aerospace and aviation industry • Metal Processing • The transportation industry

2. Acoustic Emission Terminology 2.1. Technical Terms of Acoustic Emission Technology 1. Duration of acoustic emission signal: the time interval between the beginning and ending of acoustic emission signal; 2. Acoustic emission signal termination point: the identification end point of acoustic emission signal, which is usually defined as the last intersection point between the signal and the threshold; 3. Rise time: the time interval between the starting point of AE signal and the peak value of AE signal; 4. Starting point of AE signal: the starting point of AE signal recognized by the...

10. Event count: calculate the value of each distinguishable AE event one by one; 11. Couplant: the material filled between the contact surface of the sensor and the test piece, which can improve the ability of sound energy passing through the interface in the process of acoustic emission monitoring; 12. Decibel (dB): logarithmic measurement value of AE signal amplitude with reference to 1uV, dB = 20lg (A / 1uV), where A is the amplitude voltage value of the measured AE signal; 13. Dynamic range: the decibel difference between the overload level and the minimum signal level (usually...

last time stress level, detectable acoustic emission signal appears; 23. Felicity ratio: the ratio of the stress at the time of felicity effect to the maximum stress applied last time; 24. Floating threshold: a dynamic threshold established by the time average of the amplitude of the input signal; 25. Hit: any signal that exceeds the threshold and causes a system channel to sample data; 26. Kaiser effect: under a fixed sensitivity level, there is no detectable AE signal before the stress level is exceeded. 2.2. Product Terms of SAEU3H AE System 1．Channel: a channel through which the...

5．TCP/IP: also known as network communication protocol, a data transmission protocol widely used by computers; 6．Communication board: it refers to the SAEU3H communication board. The communication board is inserted into the chassis, and the network cable can be used to connect the equipment and the upper computer; 7．AST: automatic sensor testing, which refers to the technology that the sensor transmits pulse mechanical signals under voltage excitation and they are received by the adjacent sensors to evaluate the sensitivity of adjacent sensors; 8．AD/C: analog to digital conversion, that is,...