In the past in a few years, a series of new terminal markets and application begin emerge in large numbers, prompted the demand to sensor of more high-powered position. This is in magnetic position sensor IC domain particularly apparent, what the supplier of this kind of sensor has answered the market is agog call, begin to roll out new product, the robot that is rapid development only and body of volume of unmanned aircraft market are custom-built. Sensor of new-style and magnetic position more intelligence, can offer higher resolution and precision, smaller lighter, and power comsumption far under product of the generation before its. The article will summarize the history of magnetic position sensor, and the terminal market that they serve before and service means, discuss the special new function that introduces in parts of an apparatus of current new generation and function deep next. Finally, focusing machine support of the people does not have man-machine domain, a few when share sensor of these new-style innovation magnetic position are used exemple.
Sensor of position of suddenly Er magnetism has come out very long period of time, but the ceaseless electrification as car, consumption and market of industrial application terminal, they still are in in the use in these application nowadays increase. For example, in car domain, magnetic position sensor is used at such as to change direction at present, apply the brake, transmission, shift gear implement, move of chassis height, footplate, oily volume is measured wait for car subsystem. And drive automatically the increase sharply of car can promote its dosage only demand. In consumptive domain, they are used extensively at the door position of white home appliance to detect. In industrial market territory, they are used at be being offerred to control system and industrial robot to carry out implement, lever and feedback of joy stick position. In addition, in all markets, they are used at assisting electric machinery control in great quantities.
It is OK that magnetic position sensor gets the main reason of so extensive use is them come true by the CMOS semiconductor technology of low cost, and can be offerred in worst environment accurate, can repeat, reliable position is measured. Magnetic position sensor does not suffer dirt, clay, bilge and liquid effect, and can be in work high temperature, high below wet environment. A few suppliers, for example Aimaisi semiconductor, offer even avoid the magnetic position sensor that suffers stray field effect.
Sensor of CMOS magnetic position is already integrated in sticking outfit and only kind to insert via type IC to enclose continuously into all sorts of familiar faces, to the great majority application that afore-mentioned mentioning, this kind is enclosed already enough small. Same, the bad news of typical power comsumption of sensor of CMOS magnetic position is a few milliampere. This remains a tradition car, industry and consume kind of market but level of susceptive power comsumption.
However, as the fast electrification of the car, join the new-style consumer goods of content couplet net emerges in endlessly, industrial equipment and factory are mixed through using robot and artificial intelligence to become more and more efficient intelligence is changed, the magnetic position sensor in the past suits no longer. Present design personnel thinks generally, their physical dimension and power comsumption are too big, and the function objective that precision can’t satisfy a system.
Devoting oneself to to be the terminal market such as light industry, medical treatment and space exploration to develop the design engineer of new-style robot currently, also hold same view to traditional magnetic position sensor. In market of these 3 terminal, robot stylist needs to exceed small-sized and the magnetic position sensor that exceeds low power comsumption, in order to produce arm of very cabinet high accuracy robot. The arm will use robot hand to finish complex and careful job, assemble an electron for example yuan parts of an apparatus, carry out all sorts of celiac lens operation and wait in sample of small ore of the collect on distant planet and deposit.
The unmanned aircraft market that develops quickly also is such, dimension, weight and low power comsumption are to come true to fly more for long the crucial demand of the task, territory of stage of cloud resembling a head is absorbed in what do not have man-machine, exceed small-sized with the magnetic position sensor that exceeds low power comsumption especially indispensable. Magnetic position sensor uses at unmanned aircraft photograph stage of cloud resembling a head, of the stage that it is the cloud without brush dc machine to offer inverting to feedback, offer feedback of three-dimensional gear angle position. If do not have these magnetic position sensor, photograph the stability that resembles a head to be able to ‘t provide result of photography of exclamatory making a person.
Fortunately, supplier of magnetic position sensor is answering client and the demand of these new-style terminal markets, rolled out sensor of position of new generation magnetism. Sensor of new-style and magnetic position is used super- small-sized enclose, include chip of brilliant round class to enclose (WLCSP) , should enclose almost as naked as sensor a size of itself is same, these positional sensor can enter mode of low power comsumption automatically, so that reduce integral power comsumption.
For example, semiconductor offerred Aimaisi two parts of an apparatus that can satisfy these new requirement. Sensor of AS5510 linear position uses WLCSP to enclose, dimension is 1.46mmx1.0mmx0.6mm only, have pattern of low power comsumption, use up 25μA electric current only below this mode. Same, the AS5055A of 12 precision uses small-sized QFN-16 to enclose (4.9mmx6.0mmx1.75mm) , have pattern of low power comsumption, use up 3μA electric current only below this mode. These character make AS5055A is used extensively at needing to exceed minor volume and the system of electric machinery control that exceed low power comsumption. This product is used extensively at the electric machinery that all sorts of terminal markets use to dominate a field at present, include industry and consumptive application and interstellar space to explore a robot. Semiconductor still offers Aimaisi the systematic level of a variety of magnetic position sensor is enclosed (SiP) solution, in these plan, sensor and go relevantly Ou capacitance is compositive in same in enclosing, implementation “ does not have PCB” design, in order to achieve the solution of smaller system cost and smaller over all dimension.
Semiconductor also begins Aimaisi recently offer sample of newest AS5600L of sensor of magnetic angle position. This product offers 12 output resolution, in – the integral of the biggest INL(inside the limits of 40 whole job temperature to 125oC is nonlinear) the error is ±1o only, use WLCSP (2.07mm X 2.63mmx0.6mm) to enclose, use up 1.5mA electric current only below mode of automatic low power comsumption. Two give typical examples of the INL error that is AS5600L below emulate a graph, interstitial (Z) is 1.5mm, the X/Y deviation between target magnet and sensor oneself does not exceed ±1mm. Can see in the graph, when 0 deviation of X/Y, two targets magnet all can realize INL error<±0.5o. High above in the sky is unoccupied place<When 1.5mm, INL error is OK even smaller.
Magnet (4mm Diameter, 2mm Thick)
Magnet (6mm Diameter, 2.5mm Thick)
Magnet (magnet of diametical 4mm, thick 2mm) (diametical 6mm, thick 2.5mm)
Error of this kind of low INL or high accuracy result, and the low noise below wide temperature limits and target flux and exceed low power comsumption, make be based on suddenly Er effect exceed sensor of small-sized and magnetic position (if AS5600L) can satisfy current robot and engineer of unmanned aircraft design,be opposite the demand of function and space. In addition, they still have cost advantage than technology of emulative position sensor.
Robot stylist is using sensor of position of new generation magnetism, for all sorts of terminal markets (include medical treatment, light industry and geology and space exploration) the robot with more cabinet and agile limb of research and development. The robot with cabinet limbs can be in application faster, more collect of choice accurate land and mobile object, for example: Electron of executive light industry assembles operation of lens of abdominal cavity of robot of the task, implementation, go up in distant planet even example of collect is small soil. Specific and character, they are using magnetic position sensor to offer inverting of articulatory electric machinery and gear position to feedback.
To realize these cabinet robot arms, engineer of Electromechanical unifinication design is being used flexible printed circuit board the main control that these small-sized magnetism sensor IC installs robot principal part implement on, so that provide electricity to its,the source is mixed convey data signal the main control in returning robot principal part implement. Refer to next graphs 2.
As similar as this, sensor of position of new generation magnetism also is used at unmanned aircraft domain. Developing without man-machine design personnel new-style 3 axes photograph stage of cloud resembling a head, used a lot of as same as the smartphone technologies among them, photograph the stability that resembles a head in order to maintain, ensure thereby film outstandingly the effect. However, exceed just about small-sized with low power magnetism the use play of positional sensor is worn crucial action, offerred those who photograph stage of cloud resembling a head to feedback without the buy of 3 position of axle that brushs dc machine and gear, in order to ensure the flight maintains a level from beginning to end with the camera when filming, without vibration. Refer to a graph 3.
Altogether, new generation high accuracy, small size and sensor of position of magnetism of low power comsumption IC makes current electric can grind with mechanical design engineer give out new-style, the robot with powerful function and unmanned aircraft, provide a service for a lot of new markets and application thereby. Be in before long in the future, we anticipate can see arm of robot of small-sized medical treatment wears human body interior truly, refined cultivated land is operated, with excision tumor is mixed execute other operation. On industrial robot market, we anticipate can see light-duty intelligence makes a robot be used at carrying out more complex and delicate task, if the electron is assembled. And in unmanned aircraft domain, we can continue to see photograph the development that resembles head and laden cloud stage and improved, in order to support the photography of higher resolution, finish more the 2D of high accuracy and 3D mapping.