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Daviteq V1A Piezo Vibration Sensor
LoRaWAN
Sigfox
Sub-GHz
NB-IoT

Daviteq V1A Piezo Vibration Sensor

V1A

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1. Introduction

Overview

Daviteq V1A Vibration Sensor is a vibration sensing module that utilizes the Piezo acceleration sensor to measure the vibration with a frequency of up to 10 kHz for condition monitoring and preventive maintenance applications.


The piezo-electric accelerometer is available in ranges ±25g or 50g and features a flat frequency response up to >10kHz. Its accelerometer feature a stable piezo-ceramic crystal in shear mode with low-power electronics, sealed in a fully hermetic package. The Piezo Electric technology V1A accelerometer has a proven track record for offering the reliable and long-term stable output required for condition monitoring applications. The accelerometer is designed and qualified for machine health monitoring and has superior Resolution, Dynamic Range, and Bandwidth to MEMS devices. Besides that, it can also measure the temperature at the mounting point. 


With a built-in ultra-low power microprocessor, it can compute and deliver multiple parameters like velocity RMS/ Peak, acceleration RMS/ Peak, displacement RMS/pk-pk, frequency, temperature, crest factor...


The V1A can be integrated into the wireless transmitter from Daviteq such as Sub-GHz WS433, LoRaWAN WSLRW, and Sigfox WSSFC. The connection can be via a 2m cable with an M12 connector or integrated type (WS433 only).


The V1A is also powered by the batteries in the wireless transmitter.

Specification

Sensing technology: Hermetically Sealed, Piezo-Ceramic Crystal, Shear Mode

Acceleration Range & Shock Limit (g): ±25 or 50, 10,000

Frequency Response and Resonant (Hz): 2∼10,000, > 30000

Non-Linearity, Transverse Sensitivity: ±2% FSO, < 5%

Temperature measuring and operating: -40∼85℃, with accuracy: ±0.5 and resolution: 0.125

Sensor Material, rating, and mounting: 304SUS, IP67, M6 Screw

Connector: M12-M 5-pin (Coding A) with 2m cable or Integral type

Parameter Measurement:

  • Acceleration RMS & Peak

  • Velocity RMS & Peak

  • Displacement RMS & Peak

  • Frequency & Temperature

  • Crest Factor

Acceleration range and resolution: ±25g, 6.1mg

Velocity range and resolution: 050mm/s, 0.1mm/s

Displacement range and resolution: ±5000µm, 1µm

Frequency range and resolution: 2∼10,000Hz, 1Hz

2. Principle of Operation

V1A utilizes the single-axis Piezo acceleration sensor to detect the vibration of the object with vibration from 2 Hz to 10 kHz.


A built-in high-accuracy solid-state temperature sensor allows the V1A to measure the object's surface temperature.


The microprocessor will capture the raw signal of acceleration and temperature values at a very high speed, up to 290 kHz. With this high-resolution raw signal, it performs various calculations to deliver the high accurate outputs like:

  • Acceleration RMS & Peak

  • Velocity RMS & Peak

  • Displacement RMS & Peak

  • Frequency & Temperature

  • Crest Factor

3. Calibration

The Daviteq V1A Vibration Sensor is calibrated at the factory. It is recommended the customer to re-calibrate the sensor every 12 months. Please contact us for calibration services.


Notes: The calibration and configuration can only be done when the V1A sensor is used with a Wireless transmitter like Sub-GHz (WS433-V1A) or LoRaWAN (WSLRW-V1A) or Sigfox (WSSFC-V1A). After that, use the offline tool or downlink to configure the A factor to the device.


4. Application Notes

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5. Installation Notes

Mounting Position

Rule of thumb, the V1A will be installed at the place you want to measure the vibration and/or surface temperature.


Here are some recommendations for the installation of V1A on some typical equipment based on standard ISO 20816 (or ISO 10816).


Measuring points for pedestal bearings:


Measuring points for housing-type bearings:


Measuring points for small electrical machines:


Measuring points for reciprocating engines close to the bearing locations:


Measuring points for vertical machine sets:


A pump system with 4 bearings and 5 positions of vibration monitoring:


Mounting the sensor on the equipment's surface

The V1A sensor has the inner threads M6 and there is an M6 screw that comes with the sensor as standard.


There are 02 cases of mounting:


1- There are male threads or female threads at the place to mount the sensor:

  • The V1A can be installed directly on the equipment's surface via an M6 screw or an adapter if the threads on the equipment are not M6. Please see the below figures.


There is inner threads M6 on the motor casing


Mount the sensor on the M6 screw


2- There are no male threads or female threads at the place to mount the sensor:

  • If the drilling is allowed, please make a drilled hole and then tap the inner threads M6 on the surface of the equipment so that you can install the V1A directly on the surface of the equipment. Please see the below figure.


  • if the drilling is NOT allowed, you can use the adhesive base (Item code: ACC-V1A-BASE-01) for mounting the V1A on the equipment. Please contact us for more information about this accessory.


Here are the steps to attach the adhesive base to the equipment's surface

  • Use sandpaper to remove the deposit or paint layer on the surface of the equipment;

  • Clean the surface with alcohol;

  • Apply the 2-part putty epoxy on the bottom surface of the base;

  • Place the base on the surface;


  • Use the leveling meter to level the surface of the base in 02 directions X and Y;



LEAVE IT COMPLETELY DRY AND HARDEN IN AT LEAST 24 HOURS


  • Screw the M6 screw and install the sensor module.



Connect the M12 cable (for LoRaWAN of Sigfox Version)

Connect the M12 cable to the sensor module as below picture.


6. Troubleshooting

1. The wireless/ wired transmitter is still running and sending data, however, all the measurement parameters are not updated with new values

  • The connection between the V1A sensor and the wireless transmitter is broken!

For LoRaWAN or Sigfox version: check the M12 connector and the cable to see any abnormal or looseness.

For the WS433 version: check the looseness of connection between sensor and transmitter.

  • The battery is almost draining off: Check the battery status and replace it when necessary.


2. The measured values are not as expected

  • The installation is not correct or not suitable for the sensor design: Please recheck the installation.

  • The sensor is drifting: Re-calibrate the sensor.


3. The reading values are very noisy even though there is no vibration

  • The sensor V1A got a problem: Please consult the manufacturer for a warranty or replacement.


4. HW_Error = 1

  • The lost connection between the sensor V1A and the wireless transmitter

For LoRaWAN or Sigfox version: check the M12 connector and the cable to see any abnormal or looseness.

For the WS433 version: check the looseness of connection between sensor and transmitter.

  • The sensor V1A got a problem.Please consult the manufacturer for a warranty or replacement.

7. Maintenance