Predictive maintenance & condition monitoring
Figure 7. Secure firmware framework functional blocks. SMS FIRMWARE
The system is capable of detecting the following nine commonly occurring issues:
Faults in the motor power system that can cause an asymmetry in the motor currents.
Machine rotor unbalance as a consequence of the gravity centre displacement of any of the motor rotating parts.
Loss of alignment between motor and motor load.
Faults caused in the motor stator, leading to asymmetry in the motor currents.
Malfunction of the motor when the concentricity between the stator and the rotor is not maintained.
Problems in the motor cooling system, such as obstruction of the ventilation outlet or the fan stop, in case of independent ventilation of the motor.
Rotor failures such as discontinuities in the active part of the rotor, such as rotor bars or short-circuit ring, or problems in the welds of the copper rotor.
Bearing failures such as lack of lubrication or defects in the inner and outer race, the cages, or the rolling elements.
Problems in the fixing system of the motor to the operating bench, like soft/ loose foot.
The firmware embedded in the SMS captures various parameters of the motor (vibration, temperature, speed, magnetic flux) that it is attached to and sends this data securely over a Wi-Fi connection to the back-end cloud for processing. The SMS firmware connects with an iOS or Android Smartphone via the Wi-Fi interface to enable device installation and provisioning. The firmware provides diagnostics information for troubleshooting the device during and after deployment and can be updated securely over the air.
The SMS firmware was built leveraging a portable service oriented architecture-based framework. This framework consists of modular, reusable functional blocks wrapped in application agnostic service APIs to enable reuse for other IoT applications. It also enables application developers to easily integrate application-specific signal processing functions and algorithms along with service APIs into the product. Figure 7 shows the functional blocks of the framework.
END-TO-END SECURITY
ADI OtoSense SMS is designed from end to end with industry-best security protocols and controls, which ensure that SMS data and insights maintain their accuracy and precision, are reliably processed, are transmitted with no interruptions, and are always and only accessible by authorised OtoSense SMS users. Each SMS customer has a dedicated account on the OtoSense Cloud, and all data (sensor data, insights, account information, etc.) are
Instrumentation Monthly October 2025
partitioned using the customer ID as the top-level partition key. Access to customer data is restricted to members of the customer account, and access authorisation is enforced via identity and access management services offered by premier cloud services providers.
User account creation, management, and username/password login security (including password reset functionality) leverage trusted user management and authentication services from premier identity and login service providers, which ensures safe and secure user login from both the mobile application and web dashboard. Sessions between the SMS device and the web application are exclusively established via mutually authenticated TLS. All data to or from the SMS device is encrypted and transmitted via the MQTT-over-TLS protocol. This includes sensor data, commands sent to the SMS device, and over-the-air updates transmitted to deployed SMS devices.
CONCLUSION
All the software building blocks, combined with ADI’s advanced technologies like MEMS sensors, precision converters, and signal chains and expertise in electric motors, make for a complete out-of-the box solution for the predictive maintenance of electric motors. The end-to-end secure solution is designed to provide trusted insights to increase equipment uptime, reduce operational cost, extend equipment lifetime, and improve worker productivity.
Analog Devices
www.analog.com
61
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72
