A kind of incremental optical-electricity encoder
Technical field
The utility model relates to the photoelectric coding technical field, is specifically related to a kind of incremental optical-electricity encoder.
Background technology
Encoder (Encoder) is a kind of of transducer (Sensor) class, be mainly used to detect speed, position, angle, distance or the counting of mechanical movement, except being applied in industrial machine, the control of many motor as servo motor, BLDC servo motor all need be equipped with encoder for motor controller as the detecting of commutation, speed and position, so range of application is quite extensive.According to detecting principle, encoder can be divided into optical profile type, magnetic-type, induction type and condenser type.According to its scale method and signal output form, be divided into incremental encoder and absolute type encoder.The optical grating diffraction principle of utilizing photoelectric encoder realizes displacement-digital conversion, and it is a kind of light harvesting, mechanical, electrically is the digitlization checkout gear of one.Nearly 10 in the past few years, in industries such as pharmacy, food, printing, tobacco, machineries, obtained using widely in numerous areas such as Digit Control Machine Tool, robot, radar, electro-optic theodolite, ground control's instrument, high precision closed loop governing system, servo system.Photoelectric encoder can be defined as: a kind of opto-electronic conversion of passing through, will transport to the machinery on the axle, the transducer that the geometric displacement amount converts pulse or digital quantity to, and it is mainly used in the detection of speed or position (angle).Typical photoelectric encoder is made up of code-disc (Disk), detection grating (Mask), photoelectric switching circuit (comprising light source, light-sensitive device, signaling conversion circuit), mechanical part etc.Existing photoelectric encoder resolution is lower, precision is not high, volume is big, working service is inconvenient.
The utility model content
Technical problem to be solved in the utility model be to provide a kind of resolution height, precision height, simple in structure, volume is little, use is reliable, the incremental optical-electricity encoder that is easy to safeguard.
Technical problem to be solved in the utility model realizes by the following technical solutions,
A kind of incremental optical-electricity encoder, comprise shell, the shell internal fixation has positioning body, it is characterized in that: the O RunddichtringO is equipped with in the junction of described shell and positioning body, and described positioning body connects main shaft by bearing, and described shell inner main axis one end is provided with two PCB circuit boards, between two PCB circuit boards code-disc is housed, the PCB circuit board in described code-disc left side is equipped with light-sensitive element, on the PCB circuit board on code-disc right side light source is housed, and described shell upper is connected with connector.
Described bearing is a duplex bearing.
Described shell is an aluminum alloy material.
Described main shaft is a stainless steel.
The utility model converts the geometry of machinery displacement on the output shaft to by opto-electronic conversion the transducer of pulse or digital quantity, because photoelectric code disk is coaxial with motor, during the motor rotation, code-disc and motor are with the speed rotation, the checkout gear of forming through light-sensitive element detects the some pulse signals of output, through connector output, just can reflect the rotating speed of current motor again by the number of calculating per second photoelectric encoder output pulse; In addition, for judging direction of rotation, code-disc also provides the two pulse signals of 90 ° of phase phasic differences, can make the rotary inductive signal of the electronic equipment receiving axes of received pulse, can be used to realize two-way positioning control.
The beneficial effects of the utility model are: have resolution height, precision height, simple in structure, volume is little, usefulness is reliable, be easy to safeguard, the cost performance advantages of higher, adopt firm aluminum alloy casing attractive in appearance and stainless steel rotating shaft, the design of rotating shaft duplex bearing, be applicable to harsh operational environment, and do not have the disposable machine pressure of screw and add rubber seal, dustproof, the waterproof that can be implemented under the adverse circumstances are spattered immersion and product operate as normal.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of incremental optical-electricity encoder, comprise shell 6, shell 6 internal fixation have positioning body 1, and shell 6 is equipped with O RunddichtringO 10 with the junction of positioning body 1, positioning body 1 connects main shaft 3 by bearing 2, shell 6 inner main axis 3 one ends are provided with two PCB circuit boards 8,8`, between two PCB circuit boards 8, the 8` code-disc 9 are housed, and PCB circuit 8 plates in code-disc 9 left sides are equipped with light-sensitive element 7, on the PCB circuit board 8` on code-disc 9 right sides light source 4 is housed, shell 6 tops are connected with connector 5.
Bearing 2 is a duplex bearing, and shell 6 is an aluminum alloy material, and main shaft 3 is a stainless steel.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.