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News CapaCitive sensors measure thermal expansion under extreme Conditions


Non-contact capacitive displacement sensors from Micro-Epsilon are being used to measure the thermal expansion of star sensor carriers under extreme conditions. The star sensor measuring platform was developed by German company KRP Mechatec in cooperation with Micro-Epsilon. Star sensors are optical measuring instruments based on CCD elements or other optical sensors. Critically important for space travel, star sensors determine the altitude and position control of satellites. They must therefore provide micrometre-accurate measurement results in order to ensure exact position determination in space. Therefore, the supports on which star sensors are mounted must not be subjected to any thermal deformation. The behaviour of the material used is therefore tested using high precision capacitive displacement sensors from Micro-Epsilon. The carriers have a similar shape to a large “M”. One star sensor is


mounted on the left, one on the right and another in the centre. These sensors are tilted to the left or right. The sensor in the middle points vertically upwards. During the verification test, five capacitive sensors on each support, in the X-, Y- and Z-axes, detect a possible rotation of the platforms in the μrad range (1μrad corresponds to a displacement of 1μm at 1m lever arm). Tests of the measuring platform showed a stability of the rotation measurement at the reference surfaces of <0.1μrad/K. Capacitive sensors from Micro-Epsilon operate on a non-contact, wear-free


Comment


Welcome to the April issue of Instrumentation Monthly. The Instrumentation


Monthly team visited the Instrumentation, Analysis and Testing Exhibition when it took place at Silverstone on 2 April 2019. With 70 exhibitors in attendance, the event is a great oppor tunity to see and learn about the latest equipment and technologies. A key par t of the day is the mini seminar series. Speakers from market-leading companies like Airbus, HORIBA MIRA, Jaguar Land Rover and HBM Prenscia delivered seminars relating to this year’s overall theme, “Bridging the Gap between the Vir tual & Physical Worlds.”


Victoria White, Editor


basis, achieving excellent results in terms of linearity, reproducibility and resolution. Contrary to what many engineers may think, non- contact capacitive displacement sensors are not only suitable for use in clean environments such as laboratories, cryogenics, clean rooms and operating theatres. The latest sensors are designed to operate in dirty, dusty industrial environments too. While sub- micrometre precision is reached in typical industrial environments, high precision sub-nanometre measurements are possible in clean environments, where dirt, dust, oil or moisture are not present. The capaNCDT series from Micro-Epsilon is also suitable for the detection of fast moving objects and dynamic high speed processes, enabling fast, reliable measurements of motion sequences. Capacitive sensors are also suitable for use in vacuums and ultra high vacuum applications.


www.micro-epsilon.co.uk yokogaWa appoints neW managing direCtor


held a number of senior positions. In his new role, Ramsden will implement


Yokogawa’s mid-term business plan ‘Transformation 2020’, which helps to improve productivity, efficiency and create value for customers through innovation and digital transformation. “I am delighted to take on the role of


managing director,” said Ramsden. “It is an exciting time for Yokogawa as we


Yokogawa has announced the appointment of Carl Ramsden as managing director for its UK operations, succeeding Nigel Bowden who has become executive director for New Business Development in Yokogawa Europe. Ramsden holds a BSc degree in Economics


and is a chartered accountant. He has held the role of finance director for Yokogawa UK since July 2011, and has successfully managed operational, sales and support functions during his time in the business. Following his training as a chartered


accountant Ramsden subsequently worked for Thames Water and later BASF, where he


seek to create new value for our customers’ businesses by delivering new services and new business models. We are highly focused on our transformation to create a bright future and I am confident that we can achieve profitable and sustainable growth. To do this, as well as looking forward we must also look back and continue to adhere to our founder’s principles of providing high quality in our work, embody a pioneering spirit and provide solutions that contribute to a sustainable society,” Ramsden added.


www.yokogawa.com ion sCienCe feature as sunday times one to WatCh


Ion Science featured as one of The Sunday Times Profit Track Ones to Watch, in the twentieth annual Sunday Times BDO Profit Track 100, published in the Business section on Sunday 7 April 2019. The Profit Track Ones to Watch represents


the best of the rest of the companies whose profit growth falls just shor t of the main league table, but who have shown good profit growth in the past and are set to grow rapidly in the future. Ion Science products are used in the


Instrumentation Monthly April 2019


manufacturing, automotive and oil and gas sectors, and in research laboratories, airpor ts and even high-rise buildings. Growth has been driven by the increasing


awareness of environmental harm that can be caused by cer tain gases, and underpinned by health and safety regulation. China and India are among Ion Science


fastest-growing markets, and 70 per cent of sales are international.


www.ionscience.com 5


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