FEATURE SWITCHES & RELAYS
THE MAGNETIC SENSOR MARKET GETS SWITCHED ON
include stroke and angle sensors which will be available from early 2015. The recently added sensor products meet the rising demand for actuators. Those actuators are mostly based on an electric, hydraulic and pneumatic concept and are used in automation, drive, vehicle steering and actuator applications. To achieve a better performance with actuators, a conventional openloop controller isn’t sufficient anymore as normally a closed-loop control is created which requires the use of a sensor. With the latest sensors , safety-critical systems can be engineered in compliance with SIL. The new displacement and angle sensors are designed and built, so that the required parameters for SIL-applications are available. For example reliability values have been optimised and are on hand. Also, the system can have the required diagnosis capabilities.
The second technology developed by the
The rising market for magnetic sensors and the trend for the ‘intelligent factory’ offer many opportunities for new products. Here Cherry Switches presents its modular sensor system and energy harvesting wireless switch for industrial applications
T
he magnetic sensor market has been growing rapidly since 2010 as the
demand in the automotive, industrial and consumer markets surges. The sensors are used in many different applications, ranging from high-cost industrial motors to low cost consumer products. According to the global market research company iSuppli, the global silicon magnetic sensor revenue will reach €9.88 billion in 2017, up from €4.63billion in 2011 at a compound annual growth rate (CAGR) of 12 percent. Currently the magnetic sensor market is
already dominated by hall-effect sensors with an approximate share of 70 percent (source: Panel Data). Due to increasing performance requirements by many customers this number is supposed to rise even further. This is because hall-effect solutions outperform potentiometers, reed sensors and mechanical switches at higher performance levels thanks to their robustness and elimination of wear. Europe is the largest geographical market
for magnetic sensors with a share of 61 percent (of which Germany represents 43 percent), followed by the US with 39
16 DECEMBER/JANUARY 2015 | ELECTRONICS
percent (source: Panel Data). These are also the two geographical regions where ZF/Cherry has a very strong presence. As the mature snap action switch market
in the European and North American markets is relatively stagnant, Cherry is building on its proven range of hall-effect sensors to play a more active role in the magnetic sensor market in the future. To support this strategy, the company has developed two new technologies, the first being a modular sensor system. The new modular system for the magnetic sensor market is based on several pre-defined configurations that are available on short lead-times and at very cost-effective prices. The modular system uses proven single-chip sensor devices with a standard and fully- integrated magnetic circuit and includes speed, position, angle and stroke sensors. The type of hall chip (single or differential), fixation, connection, as well as the electronic interface and protocol are all variables that can be selected by the customer. Modular speed sensors have been
available for some time from the company but the range is currently being extended, to
Figure 1: Energy harvesting evaluation kit from Cherry Switches
company in line with the progression of intelligent networking in the industry and the trend for the ‘intelligent factory’, is the energy harvesting switch. It offers many advantages in applications where a complex wire assembly and/or batteries would be inappropriate. The required RF- energy is created by the mechanical actuation of the switch and the data is transmitted wireless via RF-technology. As a result there is no need for complex and expensive connection systems, which means no cables and no batteries to change so no maintenance required - just fit and forget. The technology is very easy to install – even in hard-to-reach places. The energy harvesting wireless switch for
intelligent industrial applications is available in two standardised package versions: as a rocker switch for actuation by hand and as a snap-action switch for mechanical actuation, e.g. by a machine. The switch can easily be connected with a standard SPS bus system like OpenCAN and Profibus or industrial interfaces like RS485, SPI, 4- 20mA and 0-24V. The signal received by the receiver is simply transmitted to an SPS or other industrial control. According to the market research
company Etudes Conseil Corporation only the Industrial sector represents more than 10 percent of the total available market for magnetic sensors with 9 percent growth expected over the next five years.
Cherry Switches
www.cherryswitches.com / ELECTRONICS Enter 204
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