Daviteq Inertial Measurement Technologies

Daviteq V1A Vibration Sensor

1. 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.

2. Detail measurement principle and its specification

V1A utilizes the single-axis Piezo acceleration sensor to detect the vibration of the object with vibration from 8Hz to 11 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:

Velocity RMS (mm/s)

Velocity Peak (mm/s)

Acceleration RMS (m/s2)

Acceleration Peak (m/s2)

Displacement RMS (um)

Displacement Peak-Peak (um)
Frequency of Highest amplitude vibration (Hz) Surface Temperature (oC)

These outputs will be sent to the wireless transmitter with a digital signal.

V1A 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°C .. +85°C, 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

Acceleration range and resolution

+/- 25G, 6.1 mg

Velocity range and resolution

0 .. 50 mm/s, 0.1mm/s

Displacement range and resolution

+/- 5000 um, 1 um

Frequency range and resolution

2 .. 10,000 Hz, 1 Hz

3. Calibration of the Daviteq V1A Vibration Sensor

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 for the Daviteq V1A Vibration Sensor

The Daviteq V1A Vibration Sensor together with a wireless transmitter to be used in the following cases:

MicrosoftTeams-image-(144).png

Figure 1. The V1A sensor is mounted on a motor case.

5. Installation

5.1 Dimension Drawings

MicrosoftTeams-image-(147).png

Figure 2. Dimension drawing of WS433-V1A-...

MicrosoftTeams-image-(148).png

Figure 3. Dimension drawing of V1A module which is used for WSLRW or WSSFC

5.2 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).

V1A-Measuring-points-for-pedestal-bearings.jpg

Figure 4. Measuring points for pedestal bearings

V1A-Measuring-points-for-housing-type-bearings.jpg Figure 5. Measuring points for housing-type bearings

V1A-Measuring-points-for-small-electrical-machines.jpg

Figure 6. Measuring points for small electrical machines

V1A0-Measuring-points-for-reciprocating-engines-close-to-the-bearing-locations.jpg

Figure 7. Measuring points for reciprocating engines close to the bearing locations

Measuring-points-for-vertical-machine-sets.jpg

Figure 8. Measuring points for vertical machine sets

v1a-1.jpg

Figure 9. A pump system with 4 bearings and 5 positions of vibration monitoring

5.2 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:

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

MicrosoftTeams-image-(146).png

Figure 10. There is inner threads M6 on the motor casing

MicrosoftTeams-image-(145).png

Figure 11. Mount the sensor on the M6 screw

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

MicrosoftTeams-image-(146).png

Figure 12. Drilling and tapping an inner threads M6 on motor casing

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.

MicrosoftTeams-image-(149).png

Figure 13. Place the base with Epoxy on the equipment's surface

MicrosoftTeams-image-(150).png

Figure 14. Leveling it in the X direction

MicrosoftTeams-image-(151).png

Figure 15. Leveling it in the Y direction

MicrosoftTeams-image-(152).png

Figure 16. Leave it dry for 24 hours before installing the sensor

Note: the adhesive base is for a flat surface only or a curved surface with a radius larger than 500mm.

5.3 Connect the M12 cable (for LoRaWAN of Sigfox Version)

 

MicrosoftTeams-image-(144).png

Figure 13. Connect the M12 cable to the sensor module

6. Troubleshooting for the V1A Sensor

No. Phenomena   Reason Solutions
1

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

1.1 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.

    1.2 The battery is almost draining off. Check the battery status and replace it when necessary.
2 The measured values are not as expected 2.1 The installation is not correct or not suitable for the sensor design. Please recheck the installation.
    2.2 The sensor is drifting. Re-calibrate the sensor. Please contact us.
3 The reading values are very noisy even though there is no vibration. 3.1 The sensor V1A got a problem. Please consult the manufacturer for a warranty or replacement.
4 From system: HW_Error = 1 4.1 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.

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

7. Maintenance of the V1A Vibration Sensor

8. Default configuration

The V1A Vibration Sensor has the default configuration. The user can change the configuration on the wireless transmitter so that the complete sensor (sensor + wireless) delivers the proper output values. Below are some configuration parameters that store in the flash memory of the wireless transmitter.

Description Unit Default Format Property Comment
CONSTANT_A   1 Float R/W

Constant a for calibrating the velocity RMS and thus calibrating the whole vibration sensor

ENB_DATAGRAM   1 Uint16 R/W bit0: enable datagram 0
bit1: enable datagram 1
bit2: enable datagram 2

TEMPERATURE_OFFSET_X10

oC 0 int16 R/W

Offset adjustment for measured temperature value

END.

 

 

 

 

Daviteq AG Tilt Sensor

1. Overview

Daviteq AG Tilt Sensor is an Euler angle measurement sensor that utilizes the advanced MEMS acceleration sensor to measure the Euler angles in three directions. The acceleration sensor has high resolution and low noise allowing it to deliver very high resolution and low-temperature drift.

The AG can be integrated into the wireless transmitter from Daviteq such as Sub-GHz WS433, LoRaWAN WSLRW, and Sigfox WSSFC to build the complete Wireless Tilt Sensors.

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

2. Detail measurement principle and its specification

AG utilizes the three-axis high accuracy MEMS acceleration sensor to calculate the static Euler angles of the object it is mounted on.

TZS111_Using_An_Fig_12.jpg

 

 

The microprocessor of the Wireless transmitter will capture the raw signal of 3-axis acceleration the calculate the tilt angle of X, Y, and Z. Here are the final output values of the device.

X Tilt value

16-bit signed integer

X_TILT_VALUE = X_TILT_VALUE_X10 / 10

Range: -90.0 to 90.0

Y Tilt value

16-bit signed integer

Y_TILT_VALUE = Y_TILT_VALUE_X10 / 10

Range: -90.0 to 90.0

Z Tilt value

16-bit signed integer

Z_TILT_VALUE = Z_TILT_VALUE_X10 / 10

Range: -90.0 to 90.0

AG Tilt Sensor's specification 

Sensing technology MEMS acceleration
X/Y/Z tilt angle range -90.0 to 90.0 degree

Resolution

0.01 o for AG-02 and 0.1 o for AG-01
Repeatability +/- 0.01 o for AG-02 and +/- 0.25 o for AG-01
Within +/- 2.5 degrees of Tilt (for AG-02 version)
Max Temperature drift +/- 0.00065 o per oC
Max Non-linearity +/- 0.0622 o
Total error in 20 oC deviation +/- 0.075 o

Parameter Measurement

X tilt angle

Y tilt angle

Z tilt angle

3. Calibration of the Daviteq AG Tilt Sensor

The Daviteq AG Tilt Sensor is calibrated at the factory. We highly recommend customers perform the offset adjustment on Software.

4. Application notes for the Daviteq AG Tilt Sensor

The Daviteq AG Tilt Sensor together with a wireless transmitter to be used to measure the Tilt angle of any object, for example:

- Tree;
- Bridge;
- Pole;
- Tower;
- Crane;
- Building...

WSLRW-AG_en_2.jpg WSLRW-AG_en_3-2.jpg
WSLRW-AG_en_4-2.jpg  

5. Installation

The AG sensor is built-in with the wireless transmitter. Therefore please refer to the installation procedure in the manual for the wireless transmitters.

6. Troubleshooting for the AG Tilt Sensor

No. Phenomena   Reason Solutions
1

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

1.1 The connection between the AG tilt sensor and the wireless transmitter is broken!

Please consult the manufacturer for a warranty or replacement.

    1.2 The battery is almost draining off. Check the battery status and replace it when necessary.
2 The measured values are not as expected 2.1 The installation direction is not correct. Please recheck the installation.
    2.2 The sensor is drifting. Please consult the manufacturer for a warranty or replacement.
3 The reading values are very noisy even though the sensor is in a standstill position. 3.1 The sensor AG tilt sensor got a problem. Please consult the manufacturer for a warranty or replacement.
4 From system: HW_Error = 1 4.1 The lost connection between the sensor AG sensor and the wireless transmitter

Please consult the manufacturer for a warranty or replacement.

    4.2 The sensor AG sensor got a problem. Please consult the manufacturer for a warranty or replacement.

7. Maintenance of the AG Tilt Sensor

8. Default configuration

There is no configuration required for the AG tilt sensor. There is only configuration for the Wireless transmitter, please refer to the wireless transmitter's manual.

END.