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RAEM 2 Acoustic Wave (Acoustic Emission) Monitoring System
Model：
RAEM2
Description：
RAEM2 is an all-in-one condition monitoring system, combining acoustic emission (AE) sensor, battery, data acquisition and process module and communication modules in a small aluminium alloy cylinder.
Features：
Intermittent acquisition, battery powered, 4G/LoRa/Bluetooth accessible, suitable for condition monitoring, especially for leakage, corrosion, and wear signals.
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RAEM 2
Acoustic Wave (Acoustic Emission) Monitoring System
1. Introduction
RAEM2 is an all-in-one condition monitoring system, combining acoustic emission (AE) sensor, battery, data acquisition and process module and communication modules in a small aluminium alloy cylinder. With some magnets at the bottom base, RAEM2 can be attracted to and coupled on the metal object surface. It not only supports a variety of communication methods to the IoT Cloud, for instance 4G or LoRa, but also supports Bluetooth short range inspection. The cloud platform can be used for remote data monitoring and dual-direction transmission and configurations.
RAEM2 is a time-triggered acquisition system. The device automatically wakes up to collect data according to the setup intermittent schedule. It is independent of computers and has high reliability. It is suitable for long-term continuous unattended status monitoring.
RAEM2 with Sensor Built-in Version
RAEM2 with External Sensor Version
System Introduction
2. Technical Specifications
Hardware Specifications
| Channel | Single-channel |
| Acquisition Mode | Continuous acquisition mode, interval acquisition mode, timed acquisition mode (Note: Lora version only has interval acquisition mode) |
| Input Frequency | 10kHz-400KHz |
| Sampling Accuracy | 16-bit |
| Sampling Rate | Optional 200k/s, 500k/s, 1000k/s, 2000k/s |
| System Noise (Amplitude) | Built-in sensor version better than 40dB, external sensor version better than 30dB |
| Sensor | Resonant frequency at 150KHz (60KHz-400KHz) or 40KHz (15KHz-70kHz) optional |
| Preamplifier Supply Voltage | 28V40dB / 12V34dB / 5V26dB |
| Digital Filter | 128 steps, 0kHz-1000kHz adjustable (filter range is related to sampling rate; the maximum is 1/2 of sampling rate) |
| Data Output | Parameters (amplitude, RMS, power, ASL), waveform (Note: Lora version does not support sending waveform data) |
| Communication Modes | 4G or LoRa, RS485 |
| 4G Supported Frequency Bands |
LTE-FDD：B1/B3/B5/B8 LTE-TDD：B34/B38/B39/B40/B41 |
| On-site Inspection | Bluetooth |
| Bluetooth Maximum Communication Distance Range | Up to 13.0 meters in an unobstructed area |
| Operation Temperature | -20℃ to 60℃ |
| Power Supply Mode |
There are various options available: 1.External 8.4V DC power supply 2.Internal rechargeable battery (3000mAh@7.4V) 3.Built-in lithium-ion battery with low self-discharge rate (7000mAh@7.4V, non-rechargeable) |
| Charging Voltage | 8.4V |
| Protection Degree | IP65 |
| Sampling Length |
2000Ksps：500us~15000us 1000Ksps: 1000us~30000us 500Ksps：2000~60000us 200Ksps：5000~150000us |
| Trigger Mode | Time trigger |
| Dynamic Range | Built-in sensor version 60dB, external sensor version 70dB |
| Maximum Amplitude | 100 dB |
| Timing Acquisition Mode Hibernation Time Accuracy | ±1min (Note: Lora version: ±3min) |
| Timing Acquisition Mode Battery Life | The maximum working life when waking up once a day for 1 second each time: 3 years in theory (using 7000mAh lithium-ion battery); using 3000mAh rechargeable battery: it is recommended to charge at least once every 3 months |
| Continuous Acquisition Mode Battery Life | 15h (rechargeable battery); 24h (Lithium-ion battery) |
| Dimension | Internal sensor: diameter φ60mm, height 105mm (including 150k sensor, excluding antenna); height 117mm (including 40k sensor, excluding antenna) External sensor: diameter φ60mm, height 105mm (excluding antenna) |
| Weight (including battery, magnet, antenna) | ＜500g |
| Note: Lora gateway parameter information is only for reference of Lora version RAEM2 acoustic emission system. | |
| Theoretical maximum number of RAEM2 connected to the Lora gateway | 200 |
| Lora Gateway Maximum Communication Distance | The maximum distance to the open sea surface is 10km |
| Lora Gateway Network Access Method | LAN Ethernet, 4G |
| Lora Gateway Operating Frequency | EU433, CN470-510, CN779-787, EU863-870, US902-928, AU915-928, AS923, KR920-923 |
Main Features of RAEM2:
- Clients can access the IoT Cloud platform to configure RAEM2 settings and monitor its data in real time using computer/ mobile phone/ tablets. The Cloud platform also supports historical data review.
- Parameters and waveform data are uploaded to the cloud platform automatically for remote real-time data monitoring functions.
- Time triggers the signal acquisition, and the timing acquisition hibernation time can be set to any time.
- Connect to the Internet of Things platform using 4G / LoRa.
- With Bluetooth inspection function and the Bluetooth APP, it can be used for the on-site inspection. The APP supports real-time waveform and parameter data reviewing, and also supports historical data reviewing and online configuration functions. The modified configurations are automatically synchronized to the IoT cloud platform.
3. Platforms
3.1 Qingcheng Cloud Platform
Data can be uploaded to the IoT cloud platform for display and analysis.
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AE characteristic parameters: amplitude, average signal level, power, RMS.
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Remote configuration: remote configuration parameters, control device start or stop, and timing configuration.
3.2 Bluetooth Inspection through Smartphone APP
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Wireless configuration: online parameter setting, remote control of equipment start and stop, and timing parameter configuration. (Note: The minimum sampling interval is between 100~200ms, and the value is not fixed)
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Parameter query: Parameters include amplitude, average signal level (ASL), power, and RMS; date selection can be accurate to the minute.
4. Application Introduction
Applications are suitable for:
- Rotating bearing status monitoring
- Valve pipeline leakage monitoring
- Tool wear monitoring
- Wind power main bearing status monitoring
- Yaw bearing status monitoring
Valve and Pipeline Leakage Monitoring
Pipeline valves often corrode and leak after long-term operation. If there is no effective detection in the early stage, small corrosion or leakage will grow rapidly and eventually lead to significant losses. RAEM2 is a time-triggered acquisition, suitable for monitoring steady-state signals. It can achieve 365-day all-weather online detection and monitoring, and accurately monitor pipeline valve leakage in the early stage to inform users of the current status of pipeline valves.
Acoustic Wave (Acoustic Emission) Monitoring of Rotating Equipment
RAEM2 remote acoustic emission equipment collects acoustic emission signals of various components of rotating equipment through AE sensors. After being processed by the RAEM2 acoustic emission system, the data is uploaded to the Qingcheng cloud server through 4G/Lora communication. Users can conduct inspections through the mobile phone Bluetooth APP, and can also view real-time data through the cloud platform to achieve remote monitoring of the status of rotating equipment (damage status, lubrication status, etc.).
Further Information
RAEM2 Prodcut Manual.pdf
RAEM2 monitoring system operation guide 
