OPERATIONS MANAGEMENT
GOOD VIBRATIONS V
ibration monitoring is critical to the preventive maintenance of mining and quarrying machinery. Not
only do sensors leveraged in mining applications have to be precise; they must be extraordinarily robust, shock- resistant and stable. ASC tailors its P31x industrial grade IEPE (Integrated Electronics Piezo-Electric) sensors for customers across mining, quarrying, drilling and related methods.
VIBRATION MONITORING In the mining industry, it is typical for technical equipment to run 24/7. This often operates under extreme environmental conditions, with high levels of heat, dust, moisture, wet soil or crushed rocks aff ecting it. Add cooling emulsions, grease and
other substances that are meant to keep tools and equipment going longer and the diff iculties are compounded. The combined eff ects produce a tough environment, both for the machinery in question as well as the sensor technology installed to protect it. Typically, all this comes to a head where access for maintenance or repair is diff icult, if not impossible. To prevent expensive machine
downtime and to avoid signifi cant safety risks, it is crucial that the rotating parts of machinery are continuously monitored to predict and prevent material fatigue, damage and failure. Beyond causing excessive wear and tear, undetected issues may lead to deviations from the intended drilling path, misalignment of shafts and other out of balance working patterns.
ACCELEROMETERS EXPLAINED Piezoelectric accelerometers are based on PZT ceramic and feature IEPE circuitry to convert the charge to an analog output voltage signal. ‘Piezo’ is from Greek, meaning to squeeze. When input acceleration causes the piezoelectric material to
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www.engineerlive.com Two ASC piezoelectric accelerometers
stress, it produces an electrical charge proportional to the acceleration. The IEPE circuitry converts this charge to an analog voltage output signal.
HIGH FULL SCALE OUTPUT VOLTAGE ASC P31x industrial accelerometers feature a very high full-scale output voltage of ±8 V and low broadband noise of <100 µg. They come with a broad measurement range from ±16 g to ±800 g while covering a wide frequency response of 1.5 Hz to 16 kHz (±10 %) and a scale factor of 10 mV/g to 500 mV/g. Of extremely robust design – with shock resistance of up to 5,000 g and operational temperatures stretching from -55 °C to +150 °C – these uniaxial or triaxial sensors come in a robust stainless- steel housing with protection class IP68 and an integrated cable of confi gurable length with connectors. This compact housing and
overall robustness means the ASC P31x series can help manage the challenges of monitoring and maintaining a wide range of machines used in quarrying, mining and drilling, including engines, gearboxes, pumps, screens,
crushers and conveyors. Other tough applications such as geothermal energy drilling, other deep and surface drilling, high-frequency sheet pile vibrating/driving, ramming, pressing, hydraulic hammering, trench cutting or soil mixing techniques will also benefi t from ASC’s fl exible, cost- eff ective sensor innovations.
INERTIAL SENSOR TECHNOLOGY In recent years, inertial sensor innovations have been transforming the capacity, safety and productivity of global industries including structural engineering, automated vehicles and machines, railway and sensitive infrastructure like bridges, tunnels, dams or power stations. The mobility, commercial vehicle, aerospace, agricultural engineering, transport and general shipping sectors all benefi t from this innovative sensor technology, just as much as wind turbine, geothermal and other sustainable energy operators do.
For more information visit:
www.asc-sensors.de/en/home/
A look at how piezoelectric accelerometers can prevent downtime and production issues with hard-to-reach mining equipment
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