ifm O3M photoelectric 3D sensors

The waste industry is increasingly looking towards technology to improve throughputs and drive operational efficiency. With this in mind, ifm has developed a new generation of 3D Smart Sensors to further increase the automation level of mobile machines and drive operational efficiency.

Using the time-of-flight principal, the O3M photoelectric 3D sensor measures the distance between the sensor and the nearest surface point. The unit illuminates the scene with an external infrared light source and calculates the distance by means of the light reflected from the surface.

The O3M’s integrated, automatic object recognition detects up to 20 stationary or moving objects in the vehicle’s path. By comparing the current speed, the motion vector and fixed parameters, such as breaking distance, collision probability is calculated by the 3D sensor and transferred to the machine control system via CAN bus or Ethernet, before being signalled to the driver.

A highly developed algorithm from the automotive sector and a frame rate of up to 50 frames per second allows fast and reliable calculation of the 3D data. Additionally, the specially modulated infrared light enables continuously high recognition rates, even with reflective material of varied intensity.

The O3M is used in waste disposal vehicles for automatic recognition of dangerous situations such as during reversing or placing container bins.

Deakin researchers could recycle jeans into joints

Advanced textile recycling methods could see denim jeans transformed into artificial cartilage for joint reconstruction.

Deakin University researchers Dr Nolene Byrne and PhD candidate Beini Zeng have discovered how to dissolve denim and turn them into an aerogel that can be used for cartilage biosculpting, water filtration and used as a separator in advanced battery technology.

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Dr Byrne said the denim recycling technique would also help contribute to the fight against textile waste.

“Textile waste is a global challenge with significant environmental implications, and we’ve been working for more than four years to address this problem with a viable textile recycling solution,” she said.

“With population growth and the development of third world countries combined with today’s rapid fashion cycles, textile waste is always increasing, leading to millions of tonnes of clothes and other textiles being burnt or dumped in landfill.”

Dr Byrne said Deakin’s Institute for Frontier Materials team used an “upcycling” approach to get around cost-effectiveness issues.

“One of the main drawbacks of textile recycling efforts is that any advanced technique requires the use of chemicals, which can then make the procedure less cost-effective,” she said.

“We use environmentally-friendly chemicals, and by upcycling our approach to create a more advanced material we can address the limitations affecting other less cost-effective methods.

“We are now entering pilot-scale trials and look to be at commercial scale within 3 to 5 years with industry support.”

Dr Nolene Byrne (left) and PhD candidate Beini Zeng (right)

She said the process worked because denim was made from cotton, a natural polymer comprised of cellulose.

“Cellulose is a versatile renewable material, so we can use liquid solvents on waste denim to allow it to be dissolved and regenerated into an aerogel, or a variety of different forms,” she said.

“Aerogels are a class of advanced materials with very low density, sometimes referred to as ‘frozen smoke’ or ‘solid smoke’, and because of this low density they make excellent materials for bioscaffolding, absorption or filtration.

“When we reformed the cellulose, we got something we didn’t expect – an aerogel with a unique porous structure and nanoscopic tunnels running through the sample.”

Dr Byrne said she believed the sticky nature of the denim cellulose solution was likely responsible for the unique aerogel structure that resulted, something ideally suited for use as synthetic cartilage.

“That’s exactly what cartilage looks like – you can’t 3D print that material – and now we can shape and tune the aerogel to manipulate the size and distribution of the tunnels to make the ideal shape,” she said.

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