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Significantly within the area of autonomous automobiles, there’s a want for licensed security sensors in small kind elements, particularly for Automated Guided Autos (AGVs) and Autonomous Cellular Robots (AMRs). As compared, AMRs are extra adaptable to the present work scenario. This is because of their extra impartial navigation with out the necessity for lanes, route specs, or different infrastructure. They will adapt their routes to the scenario and infrequently understand extra environment friendly logistics. In these circumstances, high-performance sensor expertise is vital to attaining secure operation. Steering angle, wheel velocity, and the place of any automobile should be all the time reliably out there.
Small and light-weight security sensors are required to save lots of house and weight in agile and compact programs. TWK presents a portfolio of licensed sensors in a compact design with completely different security interfaces. For instance, single-turn encoders with a housing diameter and size of solely 38 mm and a Fail-Secure-over-EtherCAT (FSoE) interface (TRK38), or units with a housing depth of solely 30 mm and a CANopen security interface with a diameter of 55 mm (TBN55). Numerous housing designs can be found for these and different security interfaces similar to PROFIsafe through PROFINET. Sensors with our dependable multiturn gearbox can be found from 42 mm diameter.
TWK’s miniature encoders may be mounted immediately on the wheels of an automatic guided automobile to detect the automobile’s velocity. Alternatively, they are often mounted on the drive motor of the automobile. The units are additionally out there with magnetically shielded chrome steel housings. They will deal with speeds as much as 15,000 rpm and have a typical place decision of 16 bits/360°.
One other software for our compact encoders is the detection of the steering angle of the automobile. Right here measurements will also be taken on the wheels or, after an intermediate transmission stage, on the servo motor. Within the latter case, TWK presents units with SIL2-certified software program – the so-called slew-ring performance – which reliably converts the place of the motor/sensor shaft into the place of the wheels (steering angle). This works for arbitrary rotations over the whole measurement vary and for at the very least 1024 revolutions even when the encoder shouldn’t be powered. The wheel place is reliably and accurately output when switched on once more. Throughout commissioning, the consumer transfers the gear ratio and the required decision as parameters through the encoder’s interface and the encoder is able to use.
All units are licensed based on IEC 61508 and/or ISO 13849 – at SIL2 or PLd degree. Additional units can be found with SIL3 certification. As well as, TWK presents UL, E1, ATEX/IECEx, and totally redundant (R2) licensed sensors.
