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Agritechnica 2019

Analyzing noise in rotating components

Bosch-Rexroth introduces its IVAS vibration analysis sensor. It transmits root mean squares of vibrations via its CAN interface.

The IVAS smart sensor package combines sensor technology and edge processing to form a vibration analysis solution (Source: Bosch-Rexroth)

The compact sensor package delivers live information to help ensure increased machine availability in off-highway applications as well as in agricultural facilities and industrial plants. The product uses modern sensor technology and edge analytics to work out the relevant structure-borne noise properties of rotating components for further analysis in control units, master computers, or the cloud. In accordance with the smart data principle, only relevant properties are transmitted to a cloud solution (e.g. Bosch Rexroth’s Connected Off-Highway Solution COS).

The condition monitoring solution can be seamlessly connected to various different front ends via a connectivity control unit and corresponding software in order to monitor machine health. As part of such an overall solution, anomalies are made visible and further trend analyses provide an opportunity, for example, to optimize maintenance processes and the handling of spare parts. As part of the integrated analysis functions, the automatic frequency analysis eliminates a major hurdle that would otherwise hinder measurements of structure-borne noise from being carried out. Because the product writes the root mean squares of the vibrations in the form of a message that is easy to read on the CAN interface, technicians no longer need to assess large amounts of raw data using external Fourier transforms. Instead, they can directly assign frequency anomalies to individual cases of damage and define the next steps to be taken.

The product is suitable for analyzing the vibrations of rotating systems, from typical off-highway components such as hydraulic pumps right through to fixed industrial or agricultural applications. Depending on requirements, it can be both an enabler and part of an end-to-end solution. Bosch Rexroth, together with Bosch, provides a complete stack for this consisting of various different modules. It covers sensor hardware and embedded software including a connectivity control unit as well as edge analytics and cloud services.

In a typical deployment scenario, the information gathered and pre-assessed by the introduced solution is transmitted via a connectivity control unit to a cloud solution. If necessary, vehicle data and trends can be visualized and sensors and other IoT devices can be managed there. Bosch Rexroth’s Connected Off-Highway Solution is one such cloud services. From there, information can be retrieved even from other cloud solutions, via the REST interface for example.

Efficient sensor cube with CAN interface

The supplier deploys the Bosch Group’s cutting-edge MEMS technology for the sensor. The cube for high-precision measurements of structure-borne noise the cube measures 36 mm x 36 mm x 34,1 mm. It features a 5-pin M12 CAN connector, houses a temperature sensor, a 1-axis accelerometer with 20-kHz bandwidth and sensitivity of 200 mg as well as a 3-axis accelerometer with 3-kHz bandwidth and sensitivity down to 0,06 mg. When it is connected, protection class IP67 is achieved to ensure reliable operations under off-highway conditions. The measurement range of the temperature sensor runs from -40 °C to 105 °C.


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