BeanDevice 2.4 GHz AX-3D

Description

Available in two versions (measurement range: ±2g or ±10g), the BeanDevice® 2.4GHz AX-3D is a wireless vibration sensor with built-in data logger.

Characterised by a waterproof (IP67/Nema 6) and a lightweight aluminium casing (80x55x21mm, 155g), an ultra-low power, a very low noise (45 µg/√Hz for ±2g version), an integrated data logger that can store up to 1 million data logs, this wireless vibration sensor is well suited for acceleration and velocity monitoring.

While the vast majority of wireless sensors are not suitable for harsh industrial environment, the BeanDevice® 2.4GHz AX-3D integrates an innovative antenna diversity design, boosting the radio link quality in environments subject to random and diverse disturbances. Antenna Diversity improves both the quality and reliability of a wireless link by 30%.

The combination of a 5th order anti-aliasing filter (remotely programmable by the user) and a software IIR filter enables a seamless operation on a harsh environment (construction site, structural monitoring). Our outstanding TimeSync® function allows to reach a time-synchronisation of ±2.5ms over the wireless sensor networks. It contributes to enhance user experience about data fusion and modal analysis.

TheBeanScape® 2.4GHz (except Manager and Basic versions), a supervision software dedicated to Beanair® WSN comes with a complete vibration analysis report:

• Real-Time vibration and Velocity display

• Advanced vibration analysis tool: FFT, PPV (Peak Particle Velocity), Velocity

• Automatic FFT (with PPV values) and Velocity reports (meeting the DIN4150-3 standard)

• Alarm generation by email when a trigger is reached

Users looking for a quick and easy integration with a third party software, have choice between ModBus TCP/RTU/ASCII protocol available on our BeanGateway® 2.4GHz or OPC DA available on our BeanScape® 2.4GHz (Premium+ & Cloud versions only).

This BeanDevice® 2.4GHz AX-3D is suitable for the following applications:

• Ground vibration Monitoring on construction site

• Dynamic measurement on rolling stock

• Condition monitoring

• Structural Health Monitoring (SHM)

• Vibration analysis

Product Reference

BND-AX3D –MRG-RB

MR – Measurement Range:

– 2: ±2g measurement range

– 10: ±10g measurement range

Example: BND-AX3D-10G-RB, Wireless Accelerometer with 10g measurement range

Accelerometer Specifications
Accelerometer technology	Accurate and low power MEMS technology
Sensitivity	±2g Version : 61 µg/digit ±10g version: 305 µg/digit
Typical non-linearity	±0,1% FS
Analog to Digital converter	16-bits, SAR architecture (Successive Approximation Register) with temperature compensation
Sensor frequency response (-3 dB)	DC to 800 Hz
Noise spectral density	±2g Version : 45 µg/√Hz ±10g version: 100 µg/√Hz
Zero-g Offset Variation from RT over Temp	±2g Version : ±0.2 mg/°C ±10g version: ±0.1 mg/°C
Sensitivity Variation from RT over Temp	±2g Version : ±0.01 %/°C (XY) , ±0.02 %/°C (Z) ±10g version: ±0.01 %/°C
Offset Ratiometric Error	±2g Version : 4mg ±10g version: ±0.2% (XY) , ±0.1% (Z)
Sensitivity Ratiometric Error	±2g Version : ±1.25 % (X-Y) , ±0.2 % (Z) ±10g Version : ±1.6% (X-Y) , ±0.2 % (Z)
Cross Axis Sensitivity	2%
Anti-aliasing filter	Butterworth 5th order filter – cut-off frequency : 1 Hz to 2000 Hz remotely programmable (BeanScape®)

Over-the-air configuration (OTAC) parameters
Data Acquisition mode (SPS = sample per second)	Low Duty Cycle Data Acquisition (LDCDA) Mode: 1s to 24 hour Alarm & Survey mode: 1s to 24 hour Streaming Packet Mode
Sampling Rate (in streaming packet mode)	Minimum: 1 SPS Maximum: 3 kSPS per axis (one axis enabled) 1,5 kSPS per axis (2-axis enabled) 1 kSPS per axis (3-axis enabled)
Alarm Threshold	±2 high levels alarms & 2 low levels alarms
Power Mode	Sleep with Network Listening & Active

RF Specifications
Wireless Protocol Stack	Ultra-Power and license-free 2.4Ghz radio technology (IEEE 802.15.4E)
WSN Topology	Point-to-Point / Star
Data rate	250 Kbits/s
RF Characteristics	ISM 2.4GHz – 16 Channels. Antenna diversity architecture designed by BeanAir®
TX Power	+18 dBm
Receiver Sensitivity	-104 dBm
Maximum Radio Range	650m (Line of Sight) , 30-100m (Non Line of Sight)
Antenna	Omnidirectional radome antenna with antenna diversity Gain : 3 dBi Waterproof IP67

Embedded Data logger
Storage Capacity	up to 1 million data points
Wireless data downloading	3 minutes to download the full memory (average time)

TimeSync function : Clock synchronization over the Wireless Sensor Networks (WSN)
Clock synchronization accuracy	±2.5 ms (at 25°C)
Crystal specifications	Tolerance ±10ppm, stability ±10ppm

Environmental and Mechanical
Casing	Aluminium & Watertight (IP66) casing Dimensions in mm (LxWxH): 100x55x21 mm Weight (battery included) : 155g
Shocks resistance	100g during 50 ms
Operating Temperature	-20 °C to +65 °C
Norms & Radio certifications	• CE Labelling Directive R&TTE (Radio) ETSI EN 300 328 • FCC (North America) • ARIB STD-T66 Ver 3.6″
IP\|NEMA Rating	IP67 \| Nema 6

Power supply
Integrated battery charger	Integrated Lithium-ion battery charger with high precision battery monitoring : • Overvoltage Protection, Overcurrent/Short-Circuit Protection,Undervoltage Protection • Battery Temperature monitoring
Current consumption @ 3.3V	• During data acquisition : 20 to 30 mA • During Radio transmission : 70 mA @ 18 dBm • During Idle : < 30 uA
External power supply	+8V to +28V
Rechargeable Lithium-Polymer battery	capacity of 1.25 Ah

Option(s)
External Power Supply	Wall plug-in, Switchmode power Supply 12V @ 1,25A with sealed M8 Plug (IP67/Nema 6) Ref: M8-PWR-12V
M8 extension cable for external power supply	Molded cable with M8-3pins male plug Material: PVC with shield protection IP Rating : IP67 \| Nema 6 Cable length: 2 meters , Ref: CBL-M8-2M Cable length : 5 meters, Ref: CBL-M8-5M Cable length: 10 meters, Ref: CBL-M8-10M
Calibration certificate	Calibration certificate provided by Beanair GmbH A static calibration method is used on a granite surface plate DIN876