Design leaving an axis develops brand-new applying for magnetism coder domain

Foreword is in industrial automation domain, the career position sensor that is a delegate with coder is producing mainer and mainer effect. Among them, optical coder because its reaction time fast, precision is tall and get the favour of a large number of users. However, the equipment unit of pulse of output of signal of report of consumed of this kind of benefit is shaken extremely easily, the interference of the environmental element such as dust, damp, difference in temperature, affect the service life of signal output and oneself thereby. Compare with optical coder, use the magnetism coder of magnetic field and signal of generation of suddenly Er induction, stronger to environmental suitability, the system is compositive the feedback of chip is more accurate also. Clear value advantage makes its are in high accuracy is measured and cut a figure in the relevant application of control domain. 2.

Magnetism coder uses the coaxial coder with heavy limitation normally two kinds of different designs. Current, on the market still be mainstream product with coder of coaxial type magnetism. Coaxial magnetism coder installs sheet to magnet of extremely rare earth carry in axis of runner shaft coming back, use 4-8 suddenly Er component forms annular embattle to have a reaction. Sensor of opposite two suddenly Er divides amplifier join with difference, every rotate a week produces a cycle cosine signal, through changeover (often carry DSP chip operation) input signal for orthogonality or serial position. Of coaxial magnetism coder detect means cost is inferior, but to equipment installation raised tall requirement. Center of the midpoint of magnetic pole of north and south of magnet, chip and electric crankshaft carry a center to must maintain in same and linear on, because any installing,the mistake of mount can reduce the accuracy of coder. But in applying actually, not only the radial of electric machinery axis shakes cannot avoid, the causes relative to displacement error of chip and magnet also can affect the essence that outputs signal actually to be spent definitely. Additional, coaxial design needs from 1 insert inside the tall fold that final resolution inserts inside cycle, once rotate speed exceeds certain range cannot accurate read the positional news that takes pointwise, the accuracy that brings about actual output thereby is reduced. Stem from afore-mentioned reasons, the applied domain that is centered in relatively inferior end all the time since coder of coaxial type magnetism is long-term. Coder of magnetism of type leaving an axis 3.

Initiate the ceaseless innovation of revolutionary design leaving an axis as the technology, magnetism coder already had can to compare the performance of optical coder greatly nowadays, have the occurrence of the design leaving an axis of revolutionary meaning especially, the coder that it is magnetism created the opportunity that unfolds skill in vaster applied domain. Regard this as the person above average of one domain, the Timken® of the company leaves Tiemuken coder of axial type magnetism was solved for actual application for example the difficult problem such as calibration. Timken® uses much magnetism from coder of axial type magnetism extremely right code dish, chip installs center of positional deviate runner shaft coming back. In moving process, each pairs can produce a cycle extremely cosine signal, pass insert inside hardware implement changeover becomes orthogonality signal of serial perhaps position. After electric machinery axis rotates, the magnetic field intensity that component of chip interior suddenly Er goes to in the induction inside radial limits keeps changeless, the radial of electric machinery axis shakes (should be only inside the radial limits of magnetic field of Huo Er induction) the essence of life that also won't affect Huo Er induction to output signal allows to spend. Accordingly, in wanting to installing a process actually only, ensure chip position and radial installation are apart from (be opposite with magnetism extremely span is concerned) , can ensure the accuracy that outputs signal. Graph 2: Of 4% errors inside insert implement the precision of coder of magnetism of type leaving an axis rises, still pile up dish of diameter and magnetism with its extremely right the change of several is concerned. Below mechanical gain effect, error of smaller magnetic pole jumps over coaxial coder diameter big, and error of bigger from axial coder diameter magnetic pole is smaller. Be like what the graph shows 2 times inside insert implement precision gain respect, coaxial design shows directly for 1: 1, and error of type leaving an axis is opposite with magnetism extremely diploid decrease. If leave axial type design to contain 32 pairs extremely, need to be opposite from every only extremely insert inside the low fold that gets resolution is 1/32 can, coaxial design needs under photograph comparing from insert inside the tall fold that final resolution inserts inside whole cycle. Additional, coaxial type coder is handled with be being inserted inside DSP chip normally cosine signal, although multiple is higher but when often needing longer noise to answer. Insert inside the hardware that needs low fold only from axial type coder implement can, although the circumstance of 10000rpm exceeds to fall to also can work normally in main shaft rotate speed, stability can says top-ranking. The graph of full-scale test result inside radial and tolerancepublic errand limits shows coaxial type and coder of type leaving an axis 3 times. The experiment contrasted the coder of 3 kinds of coaxial type that comes from different manufacturer, the error that the result shows to Timken® leaves axial coder is less than coder of these 3 kinds of coaxial type apparently. And below the case that did not get be placemented correctly in the chip in installing a process, the error of coder leaving an axis is smaller than coaxial type also. Graph 3: The measurement of the error it is OK that result Timken® codes from axial type magnetism pulse of 0-5000 of coder of increment of implementation mainstream optics / the resolution with higher even group. Detect by right of patent magnetic field full magnetism processing technology, tiemuken the company can ask according to the client, agile design and production are in 0.

The code that norms magnetism span differs inside 8mm-4mm limits dish, cooperate chip induction to satisfy all sorts of actual application requirement again. 4.

Answer coder of optics of abominable operating mode easily to pile up dish use generally metal, glass, plastic wait for material to pledge. In be installed actually, pile up Pan Yuguang quick the distance of resistor is dinky, change moves any axial to damage possibly coder. Be in for example spin industry, of rapier loom shake make electric machinery axis is in rock condition from beginning to end, and the service life that causes optical coder shortens apparently. Change often to be opposite not only it is profitless to improve systematic efficiency, still can bring huge cost pressure. In the meantime, suffer photoelectricity to pass the restriction of feeling technology, the dust in producing a course, fabric is extremely drossy easy pollution illuminant blasts off, cause optical coder comfortable in harsh environment stress is poorer. And magnetism coder does not rely on illuminant, magnetism is extremely right the magnetic field of generation does not suffer contaminant effect, code dish extremely solid, consequently service life often is optical coder is multiple. In addition, because have,fight oscillatory, anti-corrosive, fight the character such as pollution, interference rejection and wide temperature, the domain that magnetism coder applicable cannot get used to at numerous and traditional optical coder. Current, in foreign market, company Timken® applies Tiemuken successfully already from coder of axial type magnetism at closed circuit pace to turn to the domain such as the system into system and car EPS; In home, pair of environment requirements such as machinery of engraving tool of the machine that note model, carpentry, spin, waterproof electric machinery are relatively strict the applied limits that the industrial domain of exacting is magnetism coder. Include freeway ETC automatic baluster machine, use feeling movie theater, rotate the general field that the contrapuntal buy control such as arena, mobile fountain, dynamoelectric forklift has a demand, and expose the situation that in difference in temperature bigger environment plays for a long time very applicable also coder of magnetism of type leaving an axis. 5.

Considerable cost effectiveness falls in abominable operating mode, optical coder must undertake enclosing to avoid to pollute, and the magnetism coder of fission type does not contain the bearing, circuit board, fittings such as bracket, can decrease for the user enclose cost. Additional, common optical coder installs a space to be 30-40mm at least, and after coder of magnetism of type leaving an axis is completing installation, occupy only make an appointment with 12-14mm space, through more compact structure farther changeover is considerable cost effectiveness. In recent years, market of global magnetism coder is in escalate. Basis " Chinese instrument 925 programs " , to 2020, only the industrial dimensions of increment coder will achieve 50 billion yuan. The market size that expands ceaselessly is adumbrative also magnetism coder leaves the development potential with tremendous coder of axial type magnetism especially. Make up extremely technology, strong environment applicability and clear cost advantage by right of reliable magnetism, coder of magnetism leaving an axis will enter increasing application field, regard a complement of optical coder as the technology, bring for the client richer choose with more tangible product. Author: Tiemuken (China) investment limited company CNC Milling CNC Machining