CN219608061U

CN219608061U - Induction type magnetic encoder

Info

Publication number: CN219608061U
Application number: CN202223540902.3U
Authority: CN
Inventors: 王明; 邹泽秀; 李东; 杨帆; 韦明
Original assignee: Hangzhou Bergerda Automation Technology Co ltd
Current assignee: Hangzhou Bergerda Automation Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-08-29
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses an induction type magnetic encoder, which comprises a motor, wherein the tail end of the motor is provided with a motor shaft in an extending mode, one end of the motor shaft is provided with a mounting groove, one end of the motor shaft is provided with a copper joint, one end of the copper joint, which is close to the motor shaft, is provided with a connecting piece, the connecting piece is connected with the mounting groove in a matched mode, one end of the copper joint, which is far away from the motor shaft, is provided with a magnet, two ends of one side, which is close to the copper joint, of the motor are provided with connecting columns, a PCB (printed circuit board) is arranged between the two connecting columns, and the middle of one side, which is close to the magnet, of the PCB is provided with an IC (integrated circuit) sensor. According to the utility model, the magnetic induction assembly senses the rotation angle change, SPI data of the angle change is sent to the singlechip for decoding, the singlechip transmits the decoded data to the external interface through the MODBUS protocol, and compared with the traditional photoelectric encoder and the traditional grating encoder, the magneto-electric encoder has the characteristics of vibration resistance, corrosion resistance, pollution resistance, interference resistance and wide temperature range.

Description

Induction type magnetic encoder

Technical Field

The utility model relates to the technical field of encoders, in particular to an induction type magnetic encoder.

Background

Magneto-electric encoders are commonly used in metallurgical, paper and woodworking machines. The high-performance magnetic encoder can be widely applied to the fields of industrial control, mechanical manufacturing, ships, spinning, printing, aviation, aerospace, radar, communication, military industry and the like.

The magneto-electric encoder is a novel angle or displacement measuring device, and the principle is that a magneto-resistance or element is adopted to measure the angle or displacement value of a changed magnetic material, the change of the angle or displacement of the magnetic material can cause the change of a certain resistance or voltage, and a pulse signal or an analog signal is output after the single chip microcomputer is processed, so that the purpose of measurement is achieved.

However, existing optical encoders are sensitive to dust, dirt, liquids, grease and other contaminants, as well as vibration and shock, thereby affecting the output of data, while optical encoders require that the surface of the element be kept clean and transparent.

Disclosure of Invention

The present utility model is directed to an induction type magnetic encoder for solving the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an induction type magnetic encoder, includes the motor, the terminal extension of motor is provided with the motor shaft, the mounting groove has been seted up to the one end of motor shaft, copper joint is installed to the one end of motor shaft, copper joint is close to the one end of motor shaft and installs the connecting piece, the cooperation is connected between connecting piece and the mounting groove, copper joint keeps away from the one end of motor shaft and installs magnet, the motor is close to one side both ends of copper joint and installs the spliced pole, two install the PCB board between the spliced pole, one side mid-mounting that the PCB board is close to magnet has the IC sensor.

Preferably, the IC sensor is a hall sensor.

Preferably, the middle part outside of spliced pole is through screw thread movable mounting threaded adjustment spare, the one end that the spliced pole kept away from the motor is through screw thread movable mounting fixed part, the outside of spliced pole is provided with the scale.

Preferably, the connecting piece and the connecting column are made of non-ferrous materials.

Preferably, the motor is close to the one end outside of PCB board and installs the shield cover, copper joint, magnet, PCB board, IC sensor are all installed in the inboard of shield cover.

Compared with the prior art, the utility model has the beneficial effects that:

the magnetic head is assembled on a rotating motor shaft, the rotating angle change is induced through the magnetic induction assembly, SPI data of the angle change is sent to the singlechip for decoding, and the singlechip transmits the decoded data to an external interface through a MODBUS protocol. Compared with the traditional photoelectric encoder and the grating encoder, the magneto-electric encoder has the characteristics of vibration resistance, corrosion resistance, pollution resistance, interference resistance and wide temperature range, and can be applied to the field which cannot be adapted to the traditional photoelectric encoder. Magnetic encoders are specially designed for extremely harsh environments, where wide temperature characteristics are generally required, capable of withstanding intense vibrations and shocks, and high levels of protection.

Drawings

FIG. 1 is a schematic diagram of an induction type magnetic encoder according to the present utility model;

FIG. 2 is a diagram of the current axis of an induction type magnetic encoder according to the present utility model;

FIG. 3 is a schematic diagram of the hardware of an induction type magnetic encoder according to the present utility model.

In the figure: the motor comprises a motor 1, a motor shaft 2, a mounting groove 3, a copper joint 4, a connecting piece 5, a magnet 6, a connecting column 7, a PCB 8, an IC sensor 9, a thread adjusting piece 10, a fixing piece 11 and a shielding cover 12.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides an induction type magnetic encoder, including motor 1, motor 1's end extension is provided with motor shaft 2, mounting groove 3 has been seted up to motor shaft 2's one end, copper joint 4 is installed to motor shaft 2's one end, copper joint 4 is close to motor shaft 2's one end and is installed connecting piece 5, the cooperation is connected between connecting piece 5 and the mounting groove 3, magnet 6 is installed to copper joint 4 one end of keeping away from motor shaft 2, connecting post 7 is installed at motor 1's one side both ends that are close to copper joint 4, install PCB board 8 between two connecting posts 7, one side mid-mounting that PCB board 8 is close to magnet 6 has IC sensor 9.

In the utility model, the IC sensor 9 adopts a Hall sensor, and the Hall sensor generally has extremely high integration level, so that not only the Hall semiconductor element and related signal processing and regulating circuits are integrated together, but also various signal output modules of different types can be integrated, for example: the sine and cosine analog signals, square wave digital level signals or bus communication output units, and the finer hall sensor brings about resolution and precision comparable to those of photoelectric encoders.

According to the utility model, the outer side of the middle part of the connecting column 7 is movably provided with a threaded adjusting piece 10 through threads, one end of the connecting column 7, which is far away from the motor 1, is movably provided with a fixing piece 11 through threads, and the outer side of the connecting column 7 is provided with scales.

In the utility model, the connecting piece 5 and the connecting column 7 are both made of non-ferrous materials.

In the utility model, the outer side of one end of the motor 1, which is close to the PCB 8, is provided with the shielding cover 12, the copper connector 4, the magnet 6, the PCB 8 and the IC sensor 9 are all arranged on the inner side of the shielding cover 12, the shielding cover 12 is arranged to prevent the magnet 6 and the IC sensor 8 from being subjected to electromagnetic interference, and under the condition of avoiding electromagnetic interference, a high-performance microprocessor is adopted to finish complex signal processing; and shortens the access time to a few microseconds.

Referring to fig. 2, if the magnetic field applied to the conductor is rotated in the direction indicated by the arrow in the above figure by taking the current flow path as the axis, the hall potential difference changes due to the change of the angle between the magnetic field and the conductor, and the trend of the potential difference changes, like the output voltage when the secondary coil rotates in fig. 2 is illustrated in the drawing, to be a sine curve. Therefore, based on the voltage on the two sides of the energized conductor, the rotating angle of the magnetic field can be reversely calculated, which is the basic working mechanism of the magnetic encoder when measuring the feedback of the rotating position. The measured rotational position is amplified and converted by a hall sensor.

Working principle: the magnetic encoder can be applied to the rotary position feedback of the motor 1, and the permanent magnet of the encoder is directly arranged at the tail end of the motor shaft 2, so that a transitional coupling bearing (or a coupling) required by a traditional feedback encoder is omitted, the non-contact position measurement is realized, the risk of failure (even damage) of the encoder caused by vibration of a mechanical shaft in the operation process of the motor 1 is reduced, the operation stability of the motor 1 is improved, and the magnetic encoder has the greatest advantage of possibly being firm. Unlike optical encoders, the magnetic version is insensitive to dust, dirt, liquids and grease contaminants, and to vibration and shock. Like optical encoders, magnetic encoders do require an air gap between the disk and the transducer. However, the air gap in a magnetic encoder does not need to be as clean and transparent as an optical encoder. The electromagnetic pulse is detected as long as there is no ferrous material between the disk and the transducer. Two important specifications of the magnetic encoder for correct operation are the radial position of the sensor relative to a magnetic disk (or a magnetic tape) and the gap distance between the sensor and a magnet, and meanwhile, the technology of multiple circles without a battery solves the problem that the multiple circles of positions cannot be fed back, meanwhile, a battery is not required to be replaced, and compared with the traditional optical encoder, the magnetic encoder does not need to have a complex code disk and a light source, the number of components is fewer, and the detection structure is simpler; meanwhile, the hall element itself has many advantages such as: firm structure, small volume, light weight, long service life, shock resistance, and no pollution or corrosion of dust, greasy dirt, water vapor, salt fog, etc. The magnetic encoder has relatively high reliability in use, is firm and durable, and is suitable for being applied to severe equipment environments, such as wind power, engineering machinery fields.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An induction magnetic encoder comprising an electric motor (1), characterized in that: the motor is characterized in that a motor shaft (2) is arranged at the tail end of the motor (1) in an extending mode, a mounting groove (3) is formed in one end of the motor shaft (2), a copper joint (4) is arranged at one end of the motor shaft (2), a connecting piece (5) is arranged at one end, close to the motor shaft (2), of the copper joint (4), the connecting piece (5) is connected with the mounting groove (3) in a matched mode, a magnet (6) is arranged at one end, far away from the motor shaft (2), of the copper joint (4), connecting posts (7) are arranged at two ends, close to one side, close to the copper joint (4), of the motor (1), of the connecting posts (7), a PCB (8) is arranged between the two connecting posts, and an IC sensor (9) is arranged in the middle of one side, close to the magnet (6), of the PCB (8).

2. An inductive magnetic encoder according to claim 1, wherein: the IC sensor (9) adopts a Hall sensor.

3. An inductive magnetic encoder according to claim 1, wherein: the middle part outside of spliced pole (7) is through screw thread movable mounting threaded adjustment spare (10), the one end that motor (1) was kept away from to spliced pole (7) is through screw thread movable mounting (11), the outside of spliced pole (7) is provided with the scale.

4. An inductive magnetic encoder according to claim 1, wherein: the connecting piece (5) and the connecting column (7) are made of non-ferrous materials.

5. An inductive magnetic encoder according to claim 1, wherein: the motor (1) is close to one end outside of PCB board (8) and installs shield cover (12), copper joint (4), magnet (6), PCB board (8), IC sensor (9) are all installed in the inboard of shield cover (12).