Conditional Monitoring With SVT-V Sensors Triggered Scan

Broadsens recently added the ability of using SVT-V series real-time wireless vibration & temperature sensors to trigger SVT-A sensors scan. This innovation made conditional based monitoring possible with wireless vibration & temperature sensors. Before this update, conditional monitoring is only possible with wired vibration sensors that have constant power supply, because it requires the sensors to acquire data continuously. SVT-V series wireless vibration and temperature sensors are the only true real-time sensors in the industry that monitor continuously with long-lasting battery. SVT-A series sensors can capture triaxial acceleration data for advanced vibration analysis and predictive maintenance. By using SVT-V series sensors to trigger SVT-A series sensor scan, the advantages of both sensors are combined to provide the most advanced wireless vibration monitoring system in the industry.

Scheduled monitoring could miss many critical events, because the machines may not be running when the sensors are scanning. It may takes weeks or many months for a scheduled monitoring system to catch the defects of random running machines.

With Broadsens's wireless vibration monitoring system, users can define a trigger level for an SVT-V sensor. The SVT-V sensor monitors continuously. When the trigger threshold is exceeded, then an SVT-A sensor group can be selected to take data for advanced vibration analysis.

As an example, when the steel plates pass through hydraulic press, an SVT300-V sensor can set up an velocity threshold and acceleration threshold to trigger a group of SVT300-A sensors to scan the motors at high frequency. The press machines could run randomly, in which case periodic monitoring by other wireless vibration sensors will miss the working condition. With proper trigger threshold definition, the high resolution triaxial acceleration data of worst working condition of the press machine can be captured by Broadsens wireless vibration and temperature sensors.

Steel mill conditional monitoring

Steel mill conditional monitoring

Railway vibration (dynamic cant) monitoring

Railway vibration (dynamic cant) monitoring

Another example is the railroad machines and structure monitoring. The trains could arrive irregularly, which makes it difficult to obtain high resolution vibration data. With this new feature, an SVT200-V sensor can be set up to trigger multiple SVT-A sensors scan when an vibration level (either acceleration RMS or velocity RMS) is exceeded. In the SVT-A sensor group, user can assign either two SVT200-A sensors or four SVT200-A sensors. We choose SVT200 sensors for high sensitivity monitoring to detect the smallest possible vibration, velocity and displacement. SVT300 or SVT400 sensor could be used depending on the vibration level in applications.

Now it is the magical part: Broadsens SVT-A series wireless vibration sensors in the same group can be synchronized to take data. User can mount two SVT200-A sensors in two tracks. Then the railway dynamic cant can be monitored when a train passes by. The cant of a railway track is the rate of change in elevation (height) between the two tracks. Both SVT-A sensors are triggered by the SVT200-V sensor to take data at the same time when a train passes by. Both the high resolution time domain and frequency domain data in 3D are transferred to Broadsens's wireless gateway for data storage and processing. Then the acceleration, velocity and displacement data are obtained at both SVT200-A sensors with the BroadVibra vibration and analysis software. When a train passes by, then the dynamic cant is obtained with this innovative technology.

The SVT-V sensor triggered SVT-A sensor high resolution scan is an repeated event, which means that the SVT-A sensor high speed scan can be triggered multiple times when either the acceleration RMS or velocity RMS level is exceeded. This ensures that the sensor system can capture critical events with high resolution (up to 16,384 samples in each axis) and high frequency data (up to 25.6kHz).

Before Broadsens developed this conditional based wireless vibration monitoring system, traditional route-based monitoring is still required, since automatic periodic monitoring could miss random defects and production lines that run randomly. A personnel needs to manually take data when the machines are running to capture the issues. However, there are dangerous sites that prohibit the personnel from being onsite. With Broadsens's advanced vibration monitoring technology, traditional route based vibration monitoring could be completely replaced in the future.

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