CN201387335Y

CN201387335Y - Hall rotary encoder

Info

Publication number: CN201387335Y
Application number: CN200920020359U
Authority: CN
Inventors: 邱召运
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-01
Filing date: 2009-04-01
Publication date: 2010-01-20
Anticipated expiration: 2019-04-01

Abstract

The utility model discloses a Hall rotary encoder, which comprises a rotary magnet array disc and a signal converter corresponding to the rotary magnet array disc, magnets are evenly arranged along a round track on the circumference of the rotary magnet array disc, and the N pole or the S pole of only one magnet faces the center of the circle; the signal converter comprises a shell, two unipolar Hall sensors which sense the magnetic lines of the opposite magnetic poles overlapped with each other and are mounted in the in the shell, and after being processed by a controller mounted in the shell, the sensing signals of the unipolar Hall sensors are outputted. A magnetic compensating block is arranged on the side of the unipolar Hall sensor far from the rotary magnet array disc and back to the rotary magnet array disc. A sleeve is fixed at the rotary center of the rotary magnet array disc, and is provided with a locking bolt. The Hall rotary encoder adopting the structure has the advantages of simple structure, convenient mounting and high environment adaptability, and is applicable to the various cases of industrial control to measure parameters such as angular displacement, linear displacement and velocity, in particular to the cases of industrial control in harsh environments.

Description

A kind of Hall rotary encoder

Technical field

The utility model relates to scrambler, a kind of Hall rotary encoder of specific design.

Background technology

In Industry Control, the location of middle equipment is moved in use near switch or optoelectronic switch usually.At present, location technology near switch or optoelectronic switch is quite ripe, use also very extensive, but along with the continuous development of industry control technology, people have had new requirement again to the displacement of equipment, not only need the mobile of equipment positioned, also need to know in real time the particular location of equipment in moving, like this, scrambler has just become people's emphasis research and development object.Scrambler is a kind of device that angular displacement or straight-line displacement is converted to electric signal.Can be divided into contact and contactless two kinds according to the playback mode scrambler. contact adopts brush output, and brush contact conduction region or insulation layer represent that the state of code is " 1 " or " 0 "; The contactless sensitive element of accepting is a light activated element, represents that the state of code is " 1 " or " 0 ", the advantage that photosensitive scrambler has the resolution height, can accurately measure with photic zone and light tight district when adopting light activated element.The weak point of conventional codec is: the brush of electric brush type scrambler causes loose contact easily, and especially after long-term the use, this defective is more obvious; The complex structure of photosensitive scrambler, installation accuracy requires high, and is higher to using environmental requirement, limited its application.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of simple in structure, easy for installation at above-mentioned deficiency, and a kind of Hall rotary encoder strong to adaptive capacity to environment.

For solving the problems of the technologies described above, the design feature of Ben Huoer rotary encoder is: comprise magnetic array rotating disk and corresponding with it signal converter, be evenly equipped with magnetic patch by circular trace on the periphery of magnetic array rotating disk, have only the N utmost point of a magnetic patch or the S utmost point towards the center of circle; Signal converter comprises shell, the overlapping unipolarity Hall element that two induction opposite magnetic pole magnetic lines of force are installed in the shell, the output after controller processing in the enclosure is installed of the induced signal of unipolarity Hall element.

The Hall rotary encoder of this structure is to utilize Hall element induction rotating magnetic field to carry out the principle work of encoding measurement.This Hall rotary encoder is to adopt non-contact measurement to detect, so adopted the branch body structure.For rotating magnetic field is provided, the Ben Huoer rotary encoder comprises a magnetic array rotating disk, is evenly equipped with magnetic patch by circular trace on the periphery of magnetic array rotating disk, and all magnetic patch are all represented a fixing position; Positional information with the magnetic patch representative converts the electric signal of representing the position to for convenience, this Hall rotary encoder also comprise one with the corresponding signal converter of magnetic array disk position, signal converter comprises the unipolarity Hall element that the energy induced field changes, in order to make signal converter can receive the magnetic signal that magnetic array rotating disk sends preferably, to send the direction of the magnetic line of force consistent for magnetic patch in the reception magnetic line of force direction of unipolarity Hall element and the magnetic array rotating disk; Like this, when magnetic array dial rotation, different magnetic patch just produces a pulsed magnetic signal near the unipolarity Hall element, when magnetic patch and unipolarity Hall element are nearest, the electric signal that the unipolarity Hall element induces is the strongest, when the center section of adjacent two magnetic patch and unipolarity Hall element are nearest, the electric signal that the unipolarity Hall element induces is the most weak, for this electrical signal conversion being become the pulse electrical signal of standard, the output terminal of unipolarity Hall element is electrically connected with the input end of controller formation, install and use for convenience, two unipolarity Hall elements and controller encapsulation are in the enclosure; It is more accurate for the Ben Huoer rotary encoder is measured, in all magnetic patch of magnetic array rotating disk, have only the N utmost point or the S utmost point of a magnetic patch to install towards center of circle direction, this magnetic patch become zero point magnetic patch or the sign magnetic patch, other residue magnetic patch are installed towards center of circle direction according to the S utmost point or the N utmost point, accordingly, for to distinguish the received magnetic line of force be that the S utmost point of magnetic patch sends or the N utmost point sends, the quantity of described unipolarity Hall element is two, these two unipolarity Hall elements are receiving overlapping placement on the magnetic line of force direction, and the direction that these two unipolarity Hall elements receive the magnetic line of force is opposite, that is to say, can only receive the magnetic line of force that the S utmost point sends towards the magnetic patch N in the center of circle utmost point if close on the unipolarity Hall element of magnetic patch, unipolarity Hall element away from magnetic patch can only receive the magnetic line of force that the N utmost point sends towards the magnetic patch S in the center of circle utmost point so, the output terminal of two unipolarity Hall elements all is electrically connected with controller input end formation, like this, when magnetic array rotating disk when magnetic patch rotates a circle since zero point, zero point, magnetic patch repeated once, angle or displacement that controller only need calculate one-period get final product, rotation is during two weeks, repeat twice, angle or displacement that controller only need calculate for two each and every one cycles get final product, and then add up and go up angle or the displacement of rotation less than one-period, not only simplified computation process, also improved computing velocity, angle that high-speed motion produces or displacement and high-acruracy survey are all highly beneficial for calculating.

In order to strengthen, on the side of magnetic array rotating disk, be provided with the magnetic compensation piece away from the unipolarity Hall element of magnetic array rotating disk away from the unipolarity Hall element of magnetic array rotating disk induction to magnetic patch.

Away from the unipolarity Hall element of magnetic array rotating disk because than that unipolarity Hall element that closes on magnetic array rotating disk apart from magnetic array rotating disk distance, a little less than causing electric signal that the unipolarity Hall element away from magnetic array rotating disk induces than the unipolarity Hall element that closes on magnetic array rotating disk, after delivering to controller, be taken as easily and disturb and reject, so, in order to compensate this magnetic induction loss, unipolarity Hall element away from magnetic array rotating disk is being provided with the magnetic compensation piece on the side of magnetic array rotating disk, the magnetic compensation piece is made by ferrimagnet, like this, when not having magnetic patch near the unipolarity Hall element, the not redeeming of magnetic compensation piece, the unipolarity Hall element is output signal not, as the magnetic patch of the corresponding polarity magnetic line of force during near the unipolarity Hall element, the magnetic compensation piece just attracts the magnetic line of force to pass through, strengthen the magnetic line of force that passes this unipolarity Hall element, make the unipolarity Hall element can export stronger pulse signal, make the stability of Ben Huoer rotary encoder stronger.

Install for convenience, the center of rotation portion of magnetic array rotating disk is installed with sleeve, and sleeve is provided with clamping screw.

When using the Ben Huoer rotary encoder to measure, generally magnetic array rotating disk is installed in the rotating shaft and uses, as a kind of convenient implementation of installing, the center of rotation portion of magnetic array rotating disk is installed with a sleeve, sleeve matches with rotating shaft, for convenience sleeve is locked on the sleeve, and sleeve is provided with clamping screw, can easily magnetic array rotating disk be fastened in the rotating shaft by tightening and unclamping clamping screw, also very convenient for dismounting.

As the convenient a kind of implementation of installing of signal converter, shell is bolted with two nuts in a tubular form outside the shell.

Because the Ben Huoer rotary encoder is the branch body structure, magnetic array rotating disk generally is installed in the rotating shaft, and signal converter generally is installed in magnetic array rotating disk and closes on corresponding equipment support or the shell, as a kind of general mounting means, the signal converter enclosure designs becomes tubulose, the shell outside is bolted with two nuts, can signal converter be clamped or be locked on most support or the shell easily by nut, and this fixed form is the spacing between conditioning signal converter and the magnetic array rotating disk easily, and is easy for installation, fast, difficult drop-off.

In sum, adopt the Hall rotary encoder of this structure, simple in structure, easy for installation, and strong to adaptive capacity to environment, be applicable in parameters such as the real-time measured angular displacement of each occasion of industry control, displacement of the lines, speed, be particluarly suitable for the abominable industry control occasion of environment and use.

Description of drawings

In conjunction with the accompanying drawings to structural representation of the present utility model:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the A-A cut-open view of Fig. 1.

Among the figure: 1 is magnetic array rotating disk, and 11 is magnetic patch, and 12 is sleeve, and 13 is clamping screw, 14 is set bolt, and 15 is mounting groove, and 16 is shaft collar, 17 for clamping dish, and 18 are the sign magnetic patch, and 2 is signal converter, 21 is shell, and 22 is Hall element, and 23 is controller, 24 is the magnetic compensation piece, and 25 is nut, and 26 is sealing gasket, 27 is gland bonnet, and 28 is wiring hole, and 29 is cushion.

Embodiment

As Fig. 1, shown in Figure 2, this Hall rotary encoder comprises magnetic array rotating disk 1 and corresponding with it signal converter 2, magnetic array rotating disk 1 comprises shaft collar 16, shaft collar 16 is arranged to discoideus, on the circumference of shaft collar 16 1 sides, be evenly equipped with 20 mounting grooves 15 according to circular trace, wherein be contained with magnetic patch 11 in the nineteen mounting groove 15, the NS utmost point of magnetic patch 11 is according to the radial distribution of circular shaft collar 16, and the S utmost point is towards the center of circle, the N utmost point is the center of circle dorsad, a sign magnetic patch 18 is installed in remaining that mounting groove 15, and the N utmost point of sign magnetic patch 18 is towards the center of circle and the N utmost point center of circle dorsad; For magnetic patch 11 and sign magnetic patch 18 are fixed on the shaft collar 16, magnetic array rotating disk 1 comprises that also clamps a dish 17, clamping dish 17 also is arranged to corresponding with shaft collar 16 discoideus, clamp dish and also be provided with the mounting groove 15 corresponding on 17 with magnetic patch 11 and sign magnetic patch 18, clamp dish 17 and be fastened on the shaft collar 16 by set bolt 14, the circumferential part that clamps dish 17 and shaft collar 16 is equipped with the recess that makes things convenient for the magnetic line of force to shed; Exert an influence shaft collar 16 and clamp dish 17 and make by aluminium or plastics in order to prevent shaft collar 16 and to clamp dish 17 magnetic to each magnetic patch 11; For convenience magnetic array rotating disk 1 is cooperated with rotating shaft, be installed with sleeve 12 at the position, the center of circle of shaft collar 16, sleeve 12 is provided with clamping screw 13, is fixed on magnetic array rotating disk 1 in the rotating shaft very convenient by clamping screw 13.Signal converter 2 comprises shell 21, unipolarity Hall element 22 is installed in the shell 21, as shown in Figure 2, the circumference of the sensitive surface of unipolarity Hall element 22 and magnetic array rotating disk 1 is oppositely arranged, for the magnetic line of force that can distinguish unipolarity Hall element 22 induction is that the N utmost point S utmost point that send or sign magnetic patch 18 of magnetic patch 11 sends, the quantity of unipolarity Hall element 22 is set to two, these two unipolarity Hall elements 22 are receiving overlapping setting on the magnetic line of force direction, and the direction of these two unipolarity Hall element 22 induced magnetism line of forces is opposite, as shown in Figure 1, in the present embodiment, 22 couples of magnetic patch 11N of unipolarity Hall element extreme direction magnetic line of force sensitivity of top, and the magnetic line of force sensitivity of 22 pairs of signs of the unipolarity Hall element of below magnetic patch 18S extreme direction, below unipolarity Hall element 22 is responsible for detecting the zero-point positioning before measuring like this, and top unipolarity Hall element 22 is responsible for detecting concrete displacement, after two unipolarity Hall elements 22 convert displacement to electric signal, undertaken by being installed in controllers 23 in the shell 21 that the pulse signal of outputting standard uses for external unit after the waveform correction optimization; For causing controlled device 23 to be used as undesired signal because the electric signal that far induces apart from magnetic array rotating disk 1 is more weak, unipolarity Hall element 22 below preventing among Fig. 1 weeds out, the unipolarity Hall element 22 of below is being provided with magnetic compensation piece 24 on the side of magnetic array rotating disk 1, magnetic compensation piece 24 is made by siliconized plate; For convenience each parts in the shell 21 are safeguarded that shell 21 is designed to tubulose, the two ends of shell 21 are bolted with gland bonnet 27, and are provided with sealing gasket 26 between gland bonnet 27 and shell 21; For convenience data line is drawn, be provided with wiring hole 28, between data line and wiring hole 28, be provided with cushion 29 and enter in the shell 21 to prevent rainwater and dust away from the gland bonnet 27 of magnetic array rotating disk 1; Signal converter 2 is installed for convenience, is bolted with two nuts 25 in the outside of shell 21, can easily signal converter 2 be locked on device housings or the support.

Claims

1, a kind of Hall rotary encoder, it is characterized in that: comprise magnetic array rotating disk (1) and corresponding with it signal converter (2), be evenly equipped with magnetic patch (11) by circular trace on the periphery of magnetic array rotating disk (1), have only the N utmost point of a magnetic patch (11) or the S utmost point towards the center of circle; Signal converter (2) comprises shell (21), the overlapping unipolarity Hall element (22) that two induction opposite magnetic pole magnetic lines of force are installed in the shell (21), output after the controller (23) of the induced signal of unipolarity Hall element (22) in being installed in shell (21) handled.

2, Hall rotary encoder as claimed in claim 1 is characterized in that: the unipolarity Hall element (22) away from magnetic array rotating disk (1) is being provided with magnetic compensation piece (24) on the side of magnetic array rotating disk (1).

3, Hall rotary encoder as claimed in claim 1 or 2 is characterized in that: the center of rotation portion of magnetic array rotating disk (1) is installed with sleeve (12), and sleeve (12) is provided with clamping screw (13).

4, Hall rotary encoder as claimed in claim 1 or 2 is characterized in that: shell (21) is bolted with two nuts (25) in a tubular form outside the shell (21).