CN102538838A - Multiturn rotary encoder - Google Patents
Multiturn rotary encoder Download PDFInfo
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- CN102538838A CN102538838A CN2012100372325A CN201210037232A CN102538838A CN 102538838 A CN102538838 A CN 102538838A CN 2012100372325 A CN2012100372325 A CN 2012100372325A CN 201210037232 A CN201210037232 A CN 201210037232A CN 102538838 A CN102538838 A CN 102538838A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a multiturn rotary encoder. The central part of the end surface of a rotary shaft (1) of the multiturn rotary encoder is provided with a first magnet (2), and the outer side of the first magnetic (2) is also provided with a second magnet (3); the multiturn rotary encoder also comprises a first sensing element (4), a second sensing element (5) and a controller (0), wherein the positions of the first sensing element (4) and the second sensing element (5) are fixed; the first sensing element (4) is arranged in the magnetic field range of the first magnet (2); within the time for the rotation of the rotary shaft (1) for a cycle, the second sensing element (5) is alternatively positioned in the magnetic field range of the second magnet (3) or is positioned out of the magnetic range of the second magnet (3); the controller is connected with the first sensing element (4) and the second sensing element (5), and is used for analyzing and processing the output signals of the first sensing element (4) and the second sensing element (5) and acquiring the detection result. The multiturn rotary encoder can measure the multiturn rotation angle of the rotary shaft, and has the characteristic of simple structure.
Description
Technical field
The present invention relates to the rotary encoder technical field, relate in particular to a kind of many circle rotary encoders.
Background technology
Rotary encoder is the device that is used for measuring rotating speed, mainly converts mechanical quantity such as the angular displacement of output shaft, angular velocity to corresponding electric pulse through opto-electronic conversion or electromagnetic conversion and exports with digital quantity.According to the scope of rotary encoder detection angles, can rotary encoder be divided into individual pen rotary encoder and many circle rotary encoders.
Fig. 1 is the disclosed a kind of many circle rotary encoder structural representations of patent documentation US6542088; Briefly introduce the principle of work of this many circle rotary encoders and the defective of existence thereof below.
As shown in Figure 1, these many circle rotary encoders comprise provides motive rotating shaft, also comprises individual pen detecting unit and number of turns detecting unit.The individual pen detecting unit comprise the code-disc 1 that is connected with rotating shaft 2 ' one '; Code-disc 1 ' be provided with optical element 3 '; Code-disc 1 ' below be provided with photoelectric probe 4 '; Drive during rotating shaft 2 ' rotation code-disc 1 ', code-disc 1 ' on optical element 3 ' thereupon rotate, the variation through photoelectric probe 4 ' the detect light of optical element 3 ' generations realizes that individual pen rotates the accurate measurement of absolute angle.
Many circle detecting units comprise with first reduction gearing 6 of rotating shaft 2 ' be connected with a joggle '; First magnet 5.1 that is connected with first reduction gearing, 6 ' output shaft, fixed first sensing element 7.1; Also comprise second reduction gearing 11 that is connected with a joggle with first reduction gearing, 6 ' output shaft ', second magnet 5.2 that is connected with second reduction gearing, 11 ' output shaft, fixed second sensing element 7.2.During rotating shaft 2 ' rotation, after first reduction gearing 6 ' deceleration, drive first magnet 5.1 with the rotation of first rotating speed, first sensing element 7.1 detects the changes of magnetic field of first magnet 5.1, changes thereby export first angle value; Meanwhile, after second reduction gearing 11 ' deceleration, second magnet 5.2 is with the rotation of second rotating speed, and second sensing element 7.2 detects the changes of magnetic field of second magnet 5.2, changes thereby export second angle value.Controller carries out calculating such as permutation and combination through the angle to the two after receiving variation of first angle value and the variation of second angle value, can realize the measurement of countershaft 2 ' rotating cycle.
This shows that many circles rotary encoder of said structure can be realized multiple-rotor 2 ' the enclose detection of the anglec of rotation through photo-electric mode and magnetic inductive mode more.Yet, many circles rotary encoder of said structure comprise photoelectric code disk 1 ' with composition such as many coil elements of the two poles of the earth magnet, its complex structure, installation accuracy are had relatively high expectations; And the individual pen measurement of angle realizes through the photo-electric mode, code-disc 1 under thump, vibration situation ' be damaged easily, and job stability is not high.
In view of this; Demand urgently to above-mentioned technical matters; A kind of new many circles rotary encoder of the design that looks for another way; Make it realize the accurate measurement of many circle anglecs of rotation, and can avoid code-disc under thump, vibration situation, to be damaged, improve the job stability of many circle rotary encoders through simple structure.
Summary of the invention
The technical matters that the present invention will solve is for providing a kind of many circle rotary encoders; Realize the accurate measurement of many circle anglecs of rotation through simple structure; And can avoid code-disc under the situation of thump, vibration, to be damaged, improve the job stability of many circle rotary encoders.
For solving the problems of the technologies described above, the present invention provides a kind of many circle rotary encoders, comprises rotating shaft; The center of said rotating shaft end face is provided with first magnet, and said end face also is provided with second magnet in the outside of said first magnet;
Said many circle rotary encoders also comprise first sensing element and first sensing element of stationkeeping; Said first sensing element is located in the magnetic field range of said first magnet; In the time that said rotating shaft rotates a circle, said second sensing element alternately is in the magnetic field range of said second magnet or is in outside the magnetic field range of said second magnet;
Also comprise the controller that is connected with said first sensing element, said second sensing element, be used for the output signal of said first sensing element, said second sensing element is carried out analyzing and processing and obtains testing result.
Preferably, said first sensing element be located at said first magnet directly over, said second sensing element be located at said second magnet directly over;
And in the process that said rotating shaft rotates a circle, said second sensing element was in the magnetic field range of said second magnet in one period continuous time, in all the other continuous times, was in outside the magnetic field range of said second magnet.
According to the described many circle rotary encoders of claim, it is characterized in that the end of said rotating shaft is provided with rotating disk, the end face of said rotating shaft is the end face of said rotating disk, the xsect of said rotating disk is greater than the xsect of said rotating shaft; Said first magnet is located at the center of said rotating disk, and said second magnet is located at the edge of said rotating disk.
Preferably, the web member of non-magnetic conduction is installed between said rotating disk and said first magnet, said rotating disk and second magnet, is used for the magnetic field isolation is carried out in said rotating shaft and first magnet, second magnet.
Preferably, the ultimate range of magnetic field coupling takes place greater than the two in the distance of said first magnet and said second magnet.
Preferably, also comprise circuit board, said circuit board is provided with A/D convertor circuit and shaping circuit; Said first sensing element is connected with said controller through said A/D convertor circuit, and said second sensing element is connected with said controller through said shaping circuit.
Preferably, said first sensing element, said second sensing element all are located on the said circuit board; Said rotating shaft outside also is provided with supporting disk, and said supporting disk one said rotating shaft is rotationally connected; And said supporting disk is connected with said circuit board.
Preferably, said rotating shaft is rotationally connected through clutch shaft bearing, second bearing and the said rotating shaft that is arranged side by side.
Preferably, said supporting disk is connected through bolt assembly with said circuit board.
Preferably, said first sensing element and said second sensing element are Hall element.
The present invention provides a kind of many circle rotary encoders, and the center of its rotating shaft end face is provided with first magnet, and end face also is provided with second magnet in the outside of first magnet; Many circle rotary encoders also comprise first sensing element and second sensing element of stationkeeping; First sensing element is located in the magnetic field range of first magnet; In the time that rotating shaft rotates a circle, second sensing element alternately is in the magnetic field range of second magnet or is in outside the magnetic field range of second magnet; Also comprise the controller that is connected with first sensing element, second sensing element, be used for the output signal of first sensing element, second sensing element is carried out analyzing and processing and obtains testing result.
Adopt this structure; When rotating shaft is rotated; First magnet of being located at rotating shaft end face center rotates thereupon; Therefore changes of magnetic field takes place with the position of its N utmost point, the S utmost point is different in the magnetic field of first magnet, because first sensing element of stationkeeping is located in the magnetic field range of first magnet, its magnetic field that can in rotating shaft rotates a circle process, sense first magnet constantly is with strong and weak variation the in the different magnetic fields that take place of rotating shaft angle.In the process that rotating shaft rotates a circle, on the output signal curve of first sensing element, the residing ad-hoc location of the equal corresponding rotating shaft of every bit, thus accurately detect the individual pen anglec of rotation of first magnet.
Meanwhile, when rotating shaft was rotated, second magnet rotated thereupon; Its rotational trajectory is for being the circle in the center of circle with the rotating shaft center; When second sensing element was in the magnetic field range of second magnet, second sensing element is the changes of magnetic field of induction second magnet in real time, and exports corresponding electric signal; When sensing element was in outside the magnetic field range of second magnet, second sense element senses was less than the changes of magnetic field of second magnet, and its output signal is 0 value.Therefore, the output signal of second sensing element is the cycle variation in the rotating shaft process, through 0 value of second sensing element output is counted, just can accurately draw the number of turns of rotating shaft rotation.
Can find out by the above-mentioned course of work; Adopt many circles rotary encoder of this structure; Utilize corresponding first magnet that is provided with and first sensing element to realize the accurate measurement of the countershaft individual pen anglec of rotation, the accurate measurement that second magnet that is provided with through correspondence and second sensing element are realized the countershaft rotating cycle.Compare with many circle rotary encoders of the prior art; Many circle rotary encoders provided by the present invention have the characteristics direct, that cumulative errors are little of measuring; Compare with photovalve with the photoelectric code disk of available technology adopting; Parts such as the sensing element that the present invention adopted, rotating shaft have stronger shock-resistant, vibration ability, and are also not fragile under the situation of harsh shock and vibration, improved the functional reliability and stability of many circles rotary encoder greatly.
Description of drawings
Fig. 1 is a kind of many circle rotary encoder structural representations of the prior art;
Fig. 2 is the structural representation of a kind of embodiment of many circle rotary encoders provided by the present invention;
Fig. 3 is the signal time history plot of first sensing element output among Fig. 2;
Fig. 4 is a kind of embodiment time history plot of the signal of second sensing element output among Fig. 2;
Fig. 5 is the time history plot of another kind of embodiment of the signal of second sensing element output among Fig. 2;
The vertical view of the supporting disk among Fig. 6 Fig. 2.
Wherein, Reference numeral among Fig. 1 and the corresponding relation between the component names are:
Code-disc 1 '; Rotating shaft 2 '; Optical element 3 '; Photoelectric probe 4 '; First magnet 5.1; Second magnet 5.2; First sensing element 7.1; Second sensing element 7.2; First reduction gearing 6 '; Second reduction gearing 11 ';
Reference numeral and the corresponding relation between the component names among Fig. 2 to Fig. 6 are: rotating shaft 1; Rotating disk 11; Web member 12; First magnet 2; Second magnet 3; First sensing element 4; Second sensing element 5; Circuit board 6; Supporting disk 7; Bolt assembly 71; Clutch shaft bearing 8; Second bearing 9; Controller 0.
Embodiment
Core of the present invention is for providing a kind of many circle rotary encoders; It can realize the accurate measurement of many circle anglecs of rotation; And has simple in structure, convenience operation; Can also avoid code-disc under the situation of thump, strong vibration, to be damaged, improve the job stability of many circles rotary encoder greatly.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Referring to figs. 2 to Fig. 4, Fig. 2 is the structural representation of a kind of embodiment of many circle rotary encoders provided by the present invention; Fig. 3 is the signal time history plot of first sensing element output among Fig. 2; Fig. 4 is the signal time history plot of second sensing element output among Fig. 2.
In a kind of embodiment, as shown in Figure 2, a kind of many circle rotary encoders provided by the present invention comprise rotating shaft 1, and the center of rotating shaft 1 end face is provided with first magnet 2, and end face also is provided with second magnet 3 in the outside of first magnet 2; Many circle rotary encoders also comprise first sensing element 4 and first sensing element 5 of stationkeeping; First sensing element 4 is located in the magnetic field range of first magnet 2; In the time that rotating shaft 1 rotates a circle, second sensing element 5 alternately is in the magnetic field range of second magnet 3 or is in outside the magnetic field range of second magnet 3; Should many circle rotary encoders also comprise the controller 0 that is connected with first sensing element 4, second sensing element 5, be used for the output signal of first sensing element 4, second sensing element 5 is carried out analyzing and processing and obtains testing result.
Adopt this structure; When rotating shaft 1 is rotated; First magnet 2 of being located at rotating shaft 1 end face center rotates thereupon; Therefore the magnetic field intensity of first magnet 2 changes with the position of its N utmost point, the S utmost point is different, because first sensing element 4 of stationkeeping is located in the magnetic field range of first magnet 2, its magnetic field intensity that can in rotating shaft 1 rotates a circle process, sense first magnet 2 constantly changes with rotating shaft 1 angle is different.As shown in Figure 3, this figure is the output signal time history plot of first sensing element; In the process that rotating shaft 1 rotates a circle, on the output signal curve of first sensing element 4, the equal corresponding rotating shaft 1 residing ad-hoc location of every bit, thus accurately detect the individual pen anglec of rotation of first magnet 2.
Meanwhile, when rotating shaft 1 was rotated, second magnet 3 rotated thereupon; Its rotational trajectory is for being the circle in the center of circle with rotating shaft 1 center; When second sensing element was in the magnetic field range of second magnet, second sensing element 5 is the changes of magnetic field of induction second magnet 3 in real time, and export corresponding electric signal; When sensing element 5 was in outside the magnetic field range of second magnet 3,5 inductions of second sensing element were less than the changes of magnetic field of second magnet, and its output signal is 0 value.Therefore, as shown in Figure 4, this figure is a kind of embodiment time history plot that passes through the output signal of second sensing element 5; The output signal curve figure of second sensing element 5 is the cycle variation in the rotating shaft process, through 0 value of second sensing element, 5 outputs is counted, just can accurately draw the number of turns of rotating shaft 1 rotation.
Can find out by the above-mentioned course of work; Adopt many circles rotary encoder of this structure; Utilize corresponding first magnet 2 that is provided with and first sensing element 4 to realize the accurate measurement of the countershafts 1 individual pen anglec of rotation, second magnet 3 that is provided with through correspondence and the accurate measurement of second sensing element, 5 realization countershafts, 1 rotating cycle.Compare with many circle rotary encoders of the prior art; Many circle rotary encoders provided by the present invention have the characteristics direct, that cumulative errors are little of measuring; Compare with photovalve with the photoelectric code disk of available technology adopting; Parts such as the sensing element that the present invention adopted, rotating shaft have stronger shock-resistant, vibration ability, and are also not fragile under the situation of harsh shock and vibration, improved the functional reliability and stability of many circles rotary encoder greatly.
Need to prove; Do not limit the particular location of the relative magnet of sensing element in the above-mentioned embodiment; Do not limit in second sensing element 5 alternately is in second magnet 3 in the process in a week is rotated in rotating shaft 1 the magnetic field or this number of times outside the venue yet; Every employing first sensing element detects the individual pen anglec of rotation of first magnet of rotation; And adopt second sensing element to detect many circles anglec of rotation of second magnet of revolution, thereby the many circles rotary encoder that draws many circles anglec of rotation of input shaft all should be worked as and belonged in protection scope of the present invention.
The concrete installation site of above-mentioned first sensing element 4 and second sensing element 5 can also further be set.
In further scheme, first sensing element 4 be located at first magnet 2 directly over, second sensing element 5 be located at second magnet 3 directly over; And in the process that rotating shaft 1 rotates a circle; Second sensing element 5 was in the magnetic field range of second magnet 3 in one period continuous time; In all the other continuous times, be in outside the magnetic field range of second magnet 3, promptly second sensing element 5 only once replaces in the process that rotating shaft 1 rotates a circle.
Adopt this structure, when rotating shaft 1 is rotated, be located at the changes of magnetic field that first sensing element 4 directly over first magnet 2 can be responded to first magnet 2 more convenient, exactly; Likewise and since second sensing element 5 be located at second magnet 3 rotate on the annular trace that forms any directly over, make its changes of magnetic field that can respond to second magnet 3 more exactly, thereby more accurately measure the number of turns of rotating shaft 1 rotation.
Because second sensing element 5 is in the magnetic field range of second magnet 3 in the process that rotating shaft 1 rotates a circle, the alternate frequency outside the magnetic field range is 1; Therefore as shown in Figure 4; Rotating shaft 1 rotates a circle in the process, and promptly in the one-period of second sensing element, 5 output signals, it is 0 electric signal that second sensing element 5 is only exported a sub-value; Like this, through just simply adding up, counting and to draw rotating cycle accurately easily to 0 value signal.
Certainly; In the process that above-mentioned rotating shaft 1 rotates a circle, the magnetic field range alternate frequency interior, that magnetic field range is outer that second sensing element 5 is in second magnet 3 can be other numbers, for example in the swing circle of rotating shaft 1; Second sensing element 5 can first continuous time section be in the magnetic field range of second magnet 3; Second continuous time section be in outside this magnetic field range, the 3rd continuous time section be in again in this magnetic field range, all the other, section was in outside this magnetic field range again continuous time.Like this; Second sensing element, 5 output signals are as shown in Figure 5; Rotating shaft 1 rotation one circle is represented in the output of per twice 0 value signals among this figure, this shows, adds up, counts the accurate measurement that can realize the countershaft number of turns equally through the output number of times to 0 value electric signal.By that analogy, above-mentioned second sensing element 5 can also adopt other alternate frequencies to be rotated the measurement of the number of turns.
Need to prove that the noun of locality that occurs among this paper " outward " refers on the end face of rotating shaft 1, by the direction of its center of circle to external diffusion, " interior " then refers to opposite direction; In addition, the noun of locality " directly over " be meant that direction from the bottom to top in the accompanying drawing 2, the appearance of these nouns of locality are that benchmark is set up with the accompanying drawing, should be appreciated that their appearance should not influence protection scope of the present invention.
Further in the scheme, above-mentioned first sensing element 4 and second sensing element 5 all can adopt Hall element.Hall element is a kind of magneto sensor commonly used, have highly sensitive, measure accurate effect.Certainly, the sensing element of above-mentioned many circle rotary encoders can also adopt the electromagnetic induction element of other kinds.
The concrete mounting means of first magnet 2, second magnet 3 can also further be set in above-mentioned many circle rotary encoders.
In concrete scheme, the end of above-mentioned rotating shaft 1 is provided with rotating disk 11, and the xsect of rotating disk 11 is greater than the xsect of rotating shaft 1, and the end face of rotating shaft 1 is the end face of rotating disk 11; First magnet 2 is located at the center of rotating disk 11, and second magnet 3 is located at the edge of rotating disk 11.
Adopt this structure; Through being set in rotating shaft 1, rotating disk 11 can realize being connected of first magnet 2, second magnet 3 and rotating shaft 1; And, can bigger space be provided for the installation of first magnet 2, second magnet 3 because the xsect of rotating disk is greater than the xsect of rotating shaft 1.Compare the end face that first magnet 2, second magnet 3 is directly installed on rotating shaft 1; It is less that this structure allows that the diameter with rotating shaft 1 is provided with; Only provide the bigger rotating disk of diameter 11 that first magnet 2 and second magnet 3 can be installed easily, make that the production cost of many circle rotary encoders is lower.
More specifically in the scheme, the web member 12 of non-magnetic conduction is installed between above-mentioned rotating disk 11 and first magnet 2, above-mentioned rotating disk 11 and second magnet 3.Like this; Make rotating shaft 1 and first magnet 2, rotating shaft 1 and second magnet 3 be in the state that magnetic field isolates; Avoid producing magnetic force between rotating shaft 1 and first magnet 2, rotating shaft 1 and second magnet 3 and many circles rotation angle measurement is caused interference, guaranteed the measurement accuracy of above-mentioned many circle rotary encoders.More specifically, this non-magnetic conduction web member 12 can be the web member 12 of stainless steel non-magnet material (for example composition is the non-magnet material of 1Cr18Ni9Ti), certainly, can also be the non-magnetic conduction web member 12 of other materials.
In another kind of embodiment, the ultimate range of magnetic field coupling takes place greater than the two in the distance of above-mentioned first magnet 2 and second magnet 3.Adopt this structure, can guarantee that the magnetic field coupling does not take place for the magnetic field of first magnet 2 and the magnetic field of second magnet 3, avoid further having guaranteed the measurement accuracy of many circles rotary encoder because two magnetic field couplings cause interference to many circles rotation angle measurement.
In another kind of embodiment, above-mentioned many circle rotary encoders can also comprise circuit board 6, and circuit board 6 is provided with A/D convertor circuit and shaping circuit; First sensing element 4 is connected with controller 0 through A/D convertor circuit, and second sensing element 5 is connected with controller 0 through shaping circuit.
Adopt this structure; The analog voltage signal of first sensing element, 4 outputs is imported in the controller 0 after A/D convertor circuit converts digital voltage signal into again; Import again in the controller 0 after the filtering of the pulse signal process shaping circuit of second sensing element, 5 outputs, the shaping; Make the electric signal of 0 pair first sensing element of controller 4,5 outputs of second sensing element analyze more accurately, calculate, improved the measurement accuracy of many circles rotary encoder.
In the concrete scheme, above-mentioned first sensing element 4, second sensing element 5 all are located on the circuit board 6, and rotating shaft 1 outside can also be provided with supporting disk 7, and supporting disk 7 is rotationally connected with rotating shaft 1; And supporting disk 7 is connected with circuit board 6.
Adopt this structure,, make that supporting disk 7 holding positions are motionless when rotating shaft 1 rotation because supporting disk 7 is rotationally connected with rotating shaft 1; Be connected with circuit board 6 owing to supporting disk 7 again; The two keeps relative position to fix; To remain the position motionless for circuit board 6 when promptly having realized rotating shaft 1 rotation, and when further realizing being located at two magnet rotations in the rotating shaft 1, the position of being located at the sensing element on the circuit board 6 keeps immobilizing; Can respond to the changes of magnetic field of the magnet corresponding, realize the measurement of many circle anglecs of rotation with it.
More specifically, above-mentioned supporting disk 7 can be rotationally connected with rotating shaft 1 through clutch shaft bearing 8, second bearing 9 that is arranged side by side.Like this, can reduce the excentricity of supporting disk 7 and rotating shaft 1, further improve the measuring accuracy and the shock resistance levels of many circle rotary encoders.
Certainly, many circle rotary encoders provided by the present invention and non-limiting employing supporting disk 7 are set the position of rotating shaft 1 and circuit board 6, can also adopt other version.Above-mentioned rotating shaft 1 also is not limited in the double-row bearing ways of connecting with the rotating manner of supporting disk 7, can also be rotationally connected through other modes such as single bearing, pivoting supports.
In the scheme further, above-mentioned supporting disk 7 is connected through bolt assembly 71 with circuit board 6.Adopt bolt to connect and make supporting disk 7 simple and convenient, and bolt has processing and fabricating advantage easily with the installation and removal process of circuit board 6.Particularly, as shown in Figure 6, Fig. 6 is the vertical view of the supporting disk among Fig. 2, and the bolt assembly 71 of above-mentioned supporting disk 7 can comprise three bolts, and three bolts are uniformly distributed on the bearings dish 7.Can guarantee like this that in the process of rotating shaft 1 rotation the suffered impact of supporting disk 7, vibration etc. evenly distribute, and further guarantee the accuracys of many circle rotation angle measurements.
More than a kind of many circle rotary encoders provided by the present invention have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. the rotary encoder of circle more than a kind comprises rotating shaft (1); It is characterized in that the center of said rotating shaft (1) end face is provided with first magnet (2), said end face also is provided with second magnet (3) in the outside of said first magnet (2);
Said many circle rotary encoders also comprise first sensing element (4) and second sensing element (5) of stationkeeping; Said first sensing element (4) is located in the magnetic field range of said first magnet (2); In the time that said rotating shaft (1) rotates a circle, said second sensing element (5) alternately is in the magnetic field range of said second magnet (3) or is in outside the magnetic field range of said second magnet (3);
Also comprise the controller (0) that is connected with said first sensing element (4), said second sensing element (5), be used for the output signal of said first sensing element (4), said second sensing element (5) is carried out analyzing and processing and obtains testing result.
2. many circle rotary encoders according to claim 1 is characterized in that, said first sensing element (4) be located at said first magnet (2) directly over, said second sensing element (5) be located at said second magnet (3) directly over;
And in the process that said rotating shaft (1) rotates a circle, said second sensing element (5) is in one period continuous time in the magnetic field range of said second magnet (3), in all the other continuous times, is in outside the magnetic field range of said second magnet (3).
3. many circle rotary encoders according to claim 2; It is characterized in that; The end of said rotating shaft (1) is provided with rotating disk (11), and the end face of said rotating shaft (1) is the end face of said rotating disk (11), and the xsect of said rotating disk (11) is greater than the xsect of said rotating shaft (1); Said first magnet (2) is located at the center of said rotating disk (11), and said second magnet (3) is located at the edge of said rotating disk (11).
4. many circle rotary encoders according to claim 3; It is characterized in that; The web member (12) of non-magnetic conduction is installed between said rotating disk (11) and said first magnet (2), said rotating disk (11) and second magnet (3), is used for that said rotating shaft (1) and first magnet (2), second magnet (3) are carried out magnetic field and isolates.
5. many circle rotary encoders according to claim 3 is characterized in that said first magnet (2) greater than the two the ultimate range of magnetic field coupling takes place with the distance of said second magnet (3).
6. according to each described many circle rotary encoders of claim 1-5, it is characterized in that also comprise circuit board (6), said circuit board (6) is provided with A/D convertor circuit and shaping circuit; Said first sensing element (4) is connected with said controller (0) through said A/D convertor circuit, and said second sensing element (5) is connected with said controller (0) through said shaping circuit.
7. many circle rotary encoders according to claim 6 is characterized in that said first sensing element (4), said second sensing element (5) all are located on the said circuit board (6); Said rotating shaft (1) outside also is provided with supporting disk (7), and said supporting disk (7) is rotationally connected with said rotating shaft (1); And said supporting disk (7) is connected with said circuit board (6).
8. many circle rotary encoders according to claim 7 is characterized in that said rotating shaft (1) is rotationally connected with said rotating shaft (1) through clutch shaft bearing (8), second bearing (9) that is arranged side by side.
9. many circle rotary encoders according to claim 8 is characterized in that said supporting disk (7) is connected through bolt assembly (71) with said circuit board (6).
10. according to each described many circle rotary encoders of claim 1-5, it is characterized in that said first sensing element (4) and said second sensing element (5) are Hall element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100372325A CN102538838A (en) | 2012-02-17 | 2012-02-17 | Multiturn rotary encoder |
| PCT/CN2012/086057 WO2013120374A1 (en) | 2012-02-17 | 2012-12-06 | Multiturn rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100372325A CN102538838A (en) | 2012-02-17 | 2012-02-17 | Multiturn rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102538838A true CN102538838A (en) | 2012-07-04 |
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| CN103162715A (en) * | 2013-03-18 | 2013-06-19 | 黄山良业阀门有限公司 | Electronic coder |
| WO2013120374A1 (en) * | 2012-02-17 | 2013-08-22 | 湖南三一智能控制设备有限公司 | Multiturn rotary encoder |
| CN103940457A (en) * | 2014-05-12 | 2014-07-23 | 长春禹衡光学有限公司 | Method for realizing counting turns of electronic type multi-turn encoder with low power consumption |
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| CN112240739A (en) * | 2019-07-19 | 2021-01-19 | 英飞凌科技股份有限公司 | Sensing of rotational angle |
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| CN103162715A (en) * | 2013-03-18 | 2013-06-19 | 黄山良业阀门有限公司 | Electronic coder |
| CN103940457A (en) * | 2014-05-12 | 2014-07-23 | 长春禹衡光学有限公司 | Method for realizing counting turns of electronic type multi-turn encoder with low power consumption |
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| CN114450561B (en) * | 2019-10-08 | 2024-02-20 | 罗伯特博世汽车转向旺多姆公司 | Method for detecting an absolute angular position or an absolute angular displacement path of a rotating component |
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