RAEM1 USER’S MANUAL Operation Guide
127Pages

RAEM1 USER’S MANUAL Operation Guide

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

• Assess the severity of the acoustic emission source. 1.3 Characteristics of Acoustic Emission Testing The discovery of each acoustic emission source indicates 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 sensitive to linear defects and can detect the movement of the defects under external structural stress. • It can detect and evaluate the state of the defects in the whole structure. • The...

1.5 Key Terms of Acoustic Emission Technology (1) Starting point of AE signal: the starting point of an AE signal recognized by the system processor, is usually when the amplitude begins to exceed the threshold. (2) End point of AE signal: the end point of the AE signal, which is usually defined as the last time that the signal amplitude crosses the threshold. (3) Duration: the time interval between the beginning and the end of the acoustic emission signal. (4) Rise time: the time interval between the starting point of AE signal and the peak of the AE signal. (5) Sensor array: a combination...

where A is the amplitude voltage value of the measured AE signal. (15) Dynamic range: the decibel difference between the overload level and the minimum signal level (usually determined by one or more factors in the noise level, low-level distortion, interference, or resolution level) in a system or sensor. (16) Effective sound velocity: the sound velocity calculated based on arrival time and distance determined by the artificial acoustic emission signal, for the use of source location. (17) Burst acoustic emission: the qualitative description of the discrete signals related to an...

the voltage of 20V is divided into 2 units, i.e., the step is about 0.305 mV. The higher the accuracy, the higher the resolution of the signal. (4) TCP/IP: also known as network communication protocol, a data transmission protocol widely used by computers. (5) AST: automatic sensor testing, which refers to the technology that the sensor transmits a mechanical pulse signal under a voltage excitation, and it is received by the adjacent sensors to evaluate the sensitivity of adjacent sensors. (6) ADC: analog to digital conversion, i.e., analog voltage signal is converted into digital signal....

(15) HDT: Hit definition time, also known as the envelop definition time, in unit of micro-second (μs). the setting range is 100 ~ 50000μs (positive integer), can be directly input in the text box. It refers to the waiting time interval of a hit signal to correctly determine the end point of that hit signal. When the set HDT value is greater than the time interval T between two adjacent wave packets that exceed the threshold, the two wave packets will be classified as one acoustic emission hit signal; if the set HDT value is less than the time interval T when the two wave packets cross the...

2. Product Introduction RAEM1 Remote Acoustic Emission system adopts ZYNQ approach with AD4001 chip as the base layer and 4G/Wi-Fi/Ethernet built-in, and supports IoT operations, such as cloud data storage and cloud data reporting. The up-to-date firmware version is V1.0.56_20220530, and the configuration software version is 2.14.2.35. 2.1 RAEM1 Introduction RAEM1 remote acoustic emission system consists of three parts: ⚫ RAEM1 (AE sensor, signal acquisition, communication) Platform (cloud server, LAN, PC, phones) Client end (phones, PC, screens) RAEM1 is an intelligent IoT acoustic...

remote communication modules. Acoustic emission sensors can be built-in or external to RAEM1. Power supply can also be built-in or external. Multiple data communication methods (Wi-Fi/ 4G/ Ethernet/ RS485 etc.) can be selected based on the user’s demands. There is SD storage card built-in to prevent stored data loss when the power is lost. Signal conditioning, including impedance. transformation, amplification, filtering Analog to digital conversion and digital signal processing, including A/D, SoC, FPGA and ARM signal processing. Communication module: 4G / Wi-Fi / Ethernet / RS485 IoT...

The regular RAEM1 system consists of a RAEM1 cylinder connected with an external sensor and 12V DC power supply, and one or two types of communication methods, including Ethernet and Wi-Fi or 4G network. 5$ (Note): (Solid Line) : (wired connection) (Dotted Line) : (wireless connection) (Module built-in) Cloud Platforms Server (Module built-in) Fig. 2-3 Regular version of RAEM1 connection diagram Figure 2-4 is a set of RAEM1 hardware which equips with the Ethernet and 4G communication. The set includes a RAEM1 with a magnet base, an integral preamp sensor (and the magnetic holder), a 4G...

Connector with Ethernet RAEM1 Sensor and magnetic holder Sensor Coaxial cable Fig. 2-4 Regular version of RAEM1 set hardware. Fig. 2-5 Regular version of RAEM1 top part function diagram

2.4 Quick Start of RAEM1 The regular version of RAEM1 (Wi-Fi + Ethernet) connection steps are as followed: 1) Read the RAEM1 label to figure out the match power adaptor and sensor. The input voltage is 12V. The

sensor type is normally the integral sensor with built-in preamplifier. The preamp voltage is supplied by RAEM1 sensor port. The analog filter in RAEM1 also requires the sensor frequency range to match. If mismatching the sensor type, it may cause some damages on the sensor or not fully functioning. So please pay attention to the label. --\ RAEM1 SN:qc_raem1_164 Input: 12V/1A Output: 28V Filter: 125-170kHz (150kHz) Debug Fbrt: 6171 https ://w w w .aendt.com __• Fig. 2-6 Regular version of RAEM1 Product Label 2) Plug in the wire cable (one with Ethernet cable and the power cable) to the...