KR20160007166A - Multi-layer division magnetization permanent magnet type high resolution encoder and signal processing method thereof - Google Patents

Abstract

A multi-layer division magnetization permanent magnet type high resolution encoder includes: a permanent magnet fixing type holder where a permanent magnet is fixated; a magnet for incremental signal detection for detecting an incremental signal by penetrating the permanent magnet fixing type holder to be combined; a magnet for absolute position detection for detecting an absolute position by penetrating the permanent fixing type holder to be combined; and a magnet for multi-turn rotation detection for multi-turn detection by penetrating the permanent magnet fixing type holder to be combined. The magnet for incremental signal detection, the magnet for absolute position detection and the magnet for multi-turn detection can be arranged in a multi-layered structure along a length direction of the permanent magnet fixing type holder. According to an embodiment of the present invention, a hollow type optical encoder can be produced by an absolute position calculation method and a signal processing method for high resolution without difficulty. In addition, the multi-layer division magnetization permanent magnet type high resolution encoder is capable of high resolution processing without restrictions on the number of pulses per unit rotation; and is capable of absolute value calculation as well as high resolution processing on the basis of a sinusoidal signal outputted through the division magnetization type permanent magnet and transmitting the same through high speed communications, and thus can be expanded and applied to various fields by linking the same with a high speed serial communications method.

Description

[0001] The present invention relates to a multi-layer division magnetoresistive permanent magnet type high resolution encoder and a signal processing method thereof.

A multi-layer segmented magnet type permanent magnet type high resolution encoder and a signal processing method thereof are disclosed. More particularly, the present invention relates to a multi-layer segmentation-type permanent magnet type high-resolution encoder and its signal processing method capable of implementing an absolute value calculation as well as a high-resolution processing based on a sinusoidal signal output through a segmented magnet type permanent magnet and transmitting the same through high- .

Generally, the rotation angle detector of an electric motor is classified into an optical encoder using a glass material as a disk, a resolver as an electromechanical encoder such as a rotation transformer, and a magnetic encoder utilizing a permanent magnet, depending on its construction method.

The encoder, which is mainly used in the motor for industrial automation, is an optical detector, which outputs a pulsed signal according to a single mechanical rotation, slits on a disk made of glass on the rotor part, Based on the pulse type signal.

When a signal generated through a window formed on the glass surface is binarized and converted into a signal, a square wave pulse signal is output, and the electric motor rotates and an electric pulse string is output. The motor controller receives this signal, calculates the number of pulses per unit time, and uses it as a method of reading the position of the motor rotor and the position within the single rotation amount from the reference position through the cumulative count.

The resolver of the electromechanical type rotates the rotor of the resolver together with the rotor of the electric motor and outputs a sinusoidal myth including the high frequency induced in the rotor coil part through the air gap when the excitation signal flows through the stator coil, And outputs it as a sinusoidal signal corresponding to one rotation to detect the rotation angle of the motor rotor. This method is mainly used in electric motor in consideration of the use environment rather than the precise use because it has excellent resistance to impact.

An encoder that uses a permanent magnet detects a sine wave output, which is a minute signal that appears through a Hall sensor that detects magnetic force by using the N pole and S pole signals of a permanent magnet, and amplifies and generates pulse information Used to implement lower resolution of rotation.

However, the above-mentioned optical encoder is mainly used at about 6,000 revolutions per minute (RPM) due to the characteristics of its constitution, and there is a limit to be able to constitute a slit for determining the actual resolution depending on its diameter. In general, The output pulse is generally about 2,000 pulses. In order to increase the resolution of the optical encoder and enlarge the number of slits, the outer diameter of the disk must be increased. In this case, there is a restriction on the attachment of the motor. Also, if the number of pulses is increased to increase the resolution, it is difficult to increase beyond the proper level due to an increase in the line impedance between the motor and the controller. In a field requiring a high rotational speed, the vibration of the rotating body is repeatedly transmitted through the rotating shaft as it is, so that breakage of the glass itself may occur frequently, and therefore, it is difficult to apply to a field requiring high speed or durability vibration. There is a problem.

On the other hand, the resolver described above is an electric machine having a wide speed band and structurally a rotary transformer type, and is very excellent in durability and environmental resistance. However, there is a problem that it is impossible to secure the resolution of performance required in a low- .

On the other hand, the encoder using the permanent magnet has a limitation on the actual magnetization width for the magnetization configuration according to the polarity of the magnet, so that there are many restrictions to construct a high-resolution encoder. In addition, resolvers and magnetic encoders have many limitations on how to generate an absolute value signal.

As described above, when all of the above-mentioned encoders are suitable for a solid shape and constitute a hollow shape for expanding the shaft inner diameter, the optical encoder is accompanied by problems such as the roughing of the glass disk, improvement of endurance vibration and high- In the case of a resolver, there is a limitation that the impedance instability and the rotation accuracy due to the increase of the transmission distance are determined by the ADC and it is difficult to calculate an absolute value. In addition, magnetic encoders have a limitation on the magnetization density due to the increase of the number of poles in the magnetization process, and it is difficult to construct an absolute encoder, and there is a limit in that a high resolution based on high-speed serial communication is required to be applied to a high-

It is an object of the present invention to solve the difficulty of an optical encoder which is difficult to produce in a hollow system through an absolute position calculation method and a signal processing method for high resolution, And to provide a signal processing method and a signal processing method therefor of a multi-layer segmented magnet type permanent magnet type high-resolution encoder which can realize a high-resolution processing by overcoming the constraints.

It is another object of the present invention to provide a high-speed serial communication method and a high-speed serial communication method capable of implementing high-resolution processing and absolute value calculation based on a sinusoidal signal output through a segmented magnet type permanent magnet, A multi-layer segmented magnet type permanent magnet type high resolution encoder and its signal processing method which can be applied to various fields by interlocking with each other.

The multi-layer split magnet type permanent magnet type high-resolution encoder according to the embodiment of the present invention includes: a permanent magnet fixed holder to which a permanent magnet is fixed; A magnet for detecting an incremental signal that is inserted through the permanent magnet fixed holder and detects an incremental signal; An absolute position detecting magnet which is inserted through the permanent magnet fixed holder and detects an absolute position; And a magnet for multi-turn rotation detection coupled to the permanent magnet fixed holder and detecting multi-turn rotation, wherein the magnet for incremental signal detection, the magnet for absolute position detection, and the magnet for multi- Can be arranged in a multi-layer structure along the longitudinal direction of the permanent magnet-fixed holder. Due to such a configuration, it is difficult to manufacture the optical encoder having a difficulty in manufacturing by a hollow method through an absolute position calculation method and a signal processing method for high- It is possible to overcome the difficulties and overcome the limitation of the number of pulses per unit of rotation to implement the high resolution processing and to implement the absolute value operation as well as the high resolution processing based on the sinusoidal signal outputted through the segmented permanent magnet It can be transmitted by high-speed communication, and it is linked with high-speed serial communication method. This expansion applies to one sector is possible.

According to one aspect of the present invention, there is provided a printed circuit board for incremental signal detection in which a magnet for detecting the incremental signal is mounted and detects a signal; An absolute position detection printed circuit board on which the absolute position detection magnet is mounted to detect a signal; And a multi-turn rotation detecting printed circuit board on which the multi-turn rotation detecting magnet is mounted to detect a signal.

According to one aspect of the present invention, the magnets for detecting the incremental signal, the magnets for detecting the absolute position, and the magnets for detecting the multi-turn are combined so as to surround the magnets for incremental signal detection, And a hall sensor module for converting a magnetic signal generated from the magnet for multi-turn rotation detection into an electric signal and reading the magnetic signal.

 According to an aspect of the present invention, the hall sensor module includes a hall sensor block for detecting an incremental signal, which receives a magnetic signal from the magnet for incremental signal detection and converts the magnetic signal into an electric signal; And an absolute position detecting Hall sensor block for receiving the magnetic signal from the absolute position detecting magnet and converting it into an electric signal.

According to one aspect, the signal detected in the incremental signal detecting hall sensor block may be represented by a sinusoidal output waveform, and the sinusoidal output waveform may be subjected to AD processing and represented by an AD arithmetic waveform.

According to one aspect, the pulse of the sinusoidal output waveform detected through the incremental signal detecting hall sensor block outputs 32 sinusoidal pulses with one cycle of N and S poles, AD-amplifies the output pulse, n (n is the number of waveforms after AD processing) times. When the AD resolution is ¹² bits, n becomes 2 ¹² and the total resolution can be 32 * 4096.

According to one aspect, the information processed through the absolute position detecting Hall sensor module and the absolute position detecting PCB may be represented by an absolute position Hall sensor array output signal by position, The absolute position detection signal can be converted into a bar code when the poles are binarized to zero.

According to one aspect of the present invention, there is further provided a signal processing unit for processing a signal from the Hall sensor module, wherein the signal processing unit processes the analog signal through the Hall sensor module after performing division of the detection magnets, The signal generated by the sensor module is barcoded to compute the absolute position, and then the processed signal is converted into operation information, and the signal can be directly output.

Meanwhile, a signal processing method of a multilayer segmented magnetoresistive permanent magnet type encoder according to an embodiment of the present invention includes: an incremental signal processing step of processing a signal output from the incremental signal detecting hall sensor block; An absolute position processing step of processing the signal output from the absolute position detection hall sensor block; And a signal transmission step of transmitting the signal processed in the incremental signal processing step and the absolute position processing step.

According to one aspect, in the incremental signal processing step, the signal outputted from the hall sensor block for incremental signal detection is converted into a digital signal through an analog signal input, subjected to an analog interpolation process, converged in a digital conversion, . ≪ / RTI >

According to one aspect of the present invention, in the absolute position processing step, the signal output from the absolute position detection Hall sensor block is pulse-converted into a square wave through an analog signal input, subjected to a bar code signal process, .

According to one aspect, a signal outputted from the hall sensor block for detecting the incremental signal is connected to a first analog amplifier, a signal outputted from the hall sensor block for absolute position detection is connected to a second analog amplifier, The analog amplifier is connected to the first analog signal converter, the second analog amplifier is connected to the second analog signal converter, the first analog signal converter is connected to the microcomputer through an AD converter or a digital signal converter, An analog signal converter is connected to the microcomputer, and the microcomputer is connected to a memory unit and a power supply, and the microcomputer can be connected to a transmission / reception signal processor.

According to the embodiment of the present invention, it is possible to solve the difficulty of the optical encoder which is difficult to produce in the hollow type through the absolute position calculation method and the signal processing method for high resolution, High resolution processing can be realized.

According to the embodiment of the present invention, not only high-resolution processing but also absolute value computation can be implemented based on a sinusoidal signal output through the segmented magnet type permanent magnet and it can be transmitted through high-speed communication. It is possible to extend the application to the field.

1 is a perspective view of a multi-layer segmented magnet type permanent magnet type high-resolution encoder according to an embodiment of the present invention.
2 is an exploded perspective view of FIG.
FIG. 3 is a view partially showing a state in which the Hall sensor module is mounted on the multilayer permanent magnet shown in FIG. 2. FIG.
FIG. 4 is a view schematically showing the arrangement of the multilayer permanent magnets shown in FIG. 3. FIG.
5 is a diagram showing AD operational amplification of the incremental output signal shown in FIG.
6 is a diagram schematically showing a configuration of a signal processing unit.
7 is a flowchart of a signal processing method of an encoder according to an embodiment of the present invention.
8 is a diagram sequentially showing a configuration for performing the signal processing method shown in FIG.

Hereinafter, configurations and applications according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following description is one of many aspects of the claimed invention and the following description forms part of a detailed description of the present invention.

In the following description, well-known functions or constructions are not described in detail for the sake of clarity and conciseness.

FIG. 1 is a perspective view of a multilayer split magnet type permanent magnet type high-resolution encoder according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 4 is a view schematically showing the arrangement of the multilayer permanent magnets shown in FIG. 3, and FIG. 5 is a view showing the arrangement of the incremental output signal shown in FIG. AD operational amplification.

Referring to FIGS. 1 and 2, a multi-layer segmented magnet type permanent magnet type high resolution encoder 100 according to an embodiment of the present invention includes a fixing bracket 110 fixed to a motor, an encoder frame 115, A rotating shaft 111 connected to the rotating shaft of the motor and disposed to pass through the fixing bracket 110 and the encoder frame 115 and a holder 119 for fixing the permanent magnet mounted on the encoder frame 115, It has a frame. Here, the rotary shaft 111 is engaged with the support bearing 117 to enable rotation of the rotary shaft 111 with respect to the encoder frame 115 while firmly engaging.

In addition, the encoder 100 of the present embodiment includes an incremental signal detection magnet 120 which is inserted through a permanent magnet fixed holder 119 to detect an incremental signal, A magnet 140 for detecting rotation of the multi-turn, a magnet 140 for detecting rotation of the multi-turn, and a printed circuit board (not shown) for incremental signal detection Turn detection circuit 151 for detecting a signal mounted on the magnet 140 for absolute position detection and an absolute position detecting printed circuit board 153 for detecting a signal to which the absolute position detecting magnet 130 is attached, A Hall sensor module 170 (see FIG. 3) for converting magnetic signals generated from the above-described detecting magnets 120, 130, and 140 into electric signals and reading them, and a Hall sensor module (Not shown) for processing signals from the signal processor 170 ) May include.

With this configuration, high-resolution processing can be performed based on the sinusoidal signal output through the segmented magnet type permanent magnets 120, 130, and 140, and an absolute value operation can be implemented, thereby realizing high-speed communication.

The arrangement of the multilayer permanent magnets 120, 130, and 140 of the present embodiment will be described with reference to FIG. 3. In the multilayer structure, the magnets 120 for incremental signal detection, the magnets for absolute position detection 130, An incremental position detecting magnet 130 is disposed below the incremental signal detecting magnet 120 and an incremental position detecting magnet 130 is disposed below the incremental signal detecting magnet 120, And the printed circuit board 153 for absolute position detection is disposed at a lower portion of the multi-turn rotation detecting magnet 140. The multi-turn rotation detecting printed circuit board 155 may be disposed at a lower portion of the multi-

The hall sensor module 170 is disposed to surround a part of the multilayer permanent magnets 120, 130 and 140 having such a structure. The magnet 120 for detecting an incremental signal, the magnet for absolute position detection 130, And the magnet 140 for multi-turn rotation detection can be converted into an electric signal.

4, the hall sensor module 170 of the present embodiment includes a hall sensor block 171 for incremental signal detection for receiving a magnetic signal from the incremental signal detection magnet 120 and converting it into an electric signal And an absolute position detecting Hall sensor block 175 for receiving a magnetic signal from the absolute position detecting magnet 130 and converting it into an electric signal.

Referring to FIG. 4, the arrangement of the stimulus of the incremental signal detection magnet 120 and the arrangement of the stimulus of the absolute position detection magnet 130 in the magnetized array of ring-shaped permanent magnets arranged in multiple layers can be known. The generated stimulus signals can be transmitted to the incremental signal detecting hall sensor block 171 and the absolute position detecting hall sensor block 175, respectively. At this time, the order for indicating the absolute position is represented by 1 to 64 in the upper part of FIG.

5, the signal detected by the incremental signal detecting hall sensor block 171 is represented by a sinusoidal output waveform 181 and AD-processed by the sinusoidal output waveform to obtain an AD arithmetic waveform 185, . For example, if the number of sinusoidal signals is 1, 2, 3,?, And N, and the waveform after AD processing one sinusoidal signal is 1, 2, 3, The signal can be divided into N * n.

Since this represents a sinusoidal pulse read through the incremental signal detecting hall sensor block 171, the number of poles represented by the magnetic pole array of the incremental signal detecting magnet 120 is set to be one cycle 32 pulses of sinusoidal wave are output and can be subdivided into 32 * n times by AD operation amplification. At this time, when the AD resolution is set to ¹² bits, n becomes 2 ¹² (4096) and the total resolution becomes 32 * 4096. That is, high resolution can be obtained.

On the other hand, for absolute position signal processing, absolute position permanent magnet array detection and absolute position detection signal bar code conversion detection can be detected as described in the following table.

The signal read through the absolute position detection hall sensor block 175 can be known from Table 1. The information received and processed through the absolute position detecting Hall sensor block 175 and the absolute position detecting printed circuit board 153 from the rotating magnet arranged in a circle in accordance with the magnetic pole arrangement of the absolute position detecting magnet 130, Can be represented by an array output signal of the hall sensor block 175 for absolute position detection.

When the N-pole is set to 1 and the S-pole is set to 0 in the above signal, the absolute position detection signal bar code conversion detection chart shown in Table 2 below can be generated.

Here, when the rotor position is divided into 64 intervals, the position information can be tracked based on the arrangement of the digital bar code array of the absolute position detection hall sensor block 175.

As a result, high-resolution incremental information and absolute position signal information can be obtained.

In the following, the signal processing of the above-described encoder 100 will be described.

6 is a diagram schematically showing a configuration of a signal processing unit.

As shown in the figure, the signal processing unit of the present embodiment is configured to perform high-speed computation processing. After the detection magnet is divided (S10), analog signal processing (S20) is performed through the Hall sensor module 170 Next, the signal generated by the hall sensor module 170 is barcoded (S30), the absolute position is calculated, the processed signal is converted into operation information (S40), and the signal is directly output.

7, the signal processing method of an encoder according to an embodiment of the present invention includes an incremental signal processing step of processing a signal output from the incremental signal detecting hall sensor block 171 An absolute position processing step S200 for processing the signal outputted from the absolute position detecting hall sensor block 175 and an absolute position processing step S200 for processing the absolute position signal processing step S100 and the absolute position processing step S200, And a signal transmission step S300 for transmitting a signal.

In the incremental signal processing step S100, the signal output from the incremental signal detecting hall sensor block 171 is converted into a digital signal through an analog signal input, subjected to analog interpolation processing, converged in digital conversion, .

On the other hand, in the absolute position processing step S200, the signal outputted from the absolute position detection hall sensor block 175 is pulse-converted into a square wave through a signal discrimination process through an analog signal input, and then subjected to a barcode signal processing process A position operation can be performed.

The signals processed in this way are transmitted to the outside by the module that transmits the signals.

8, the signal output from the incremental signal detecting Hall sensor block 171 is connected to, for example, two first analog amplifiers 191 (AMP_S1, AMP_S2) 175 may be connected to a plurality of second analog amplifiers 191 (AMP_H1 to AMP_H6). The first analog amplifier 191 is connected to the first analog signal converter 192 and the second analog amplifier 191 is connected to the second analog signal converter 193.

The first analog signal converter 192 is connected to the microcomputer 196 via an AD converter 194 or a digital signal converter 195 and the second analog signal converter 193 is connected directly to the microcomputer 196 . The microcomputer 196 is connected to the memory unit 197 and the power supply 199 and the microcomputer 196 is connected to the transmission / reception signal processor 198.

The magnetic pole arrangement of the absolute position detection magnet 130 and the stimulation signal generated from the stimulation arrangement of the magnet 120 for incremental signal detection are transmitted to the analog amplifier (not shown) through each hall sensor block 171, 175 191). The sinusoidal signals distorted from the hall sensor blocks 171 and 175 are firstly filtered through the respective analog amplifiers 191 and input to the first analog signal converter 192 and the second analog signal converter 193. The incremental signal input from the first analog amplifier 191 is differentially amplified by the first analog signal converter 192 and input to the microcomputer 196 via the high speed AD converter 194, Converted into a square wave output signal through the converter 195 and input to the microcomputer 196. [

Through this process, it is possible to perform the function of the above-described incremental output signal AD operation amplification. The absolute position hall sensor detection signal input through the analog amplifier 191 is converted into serial or parallel information through the second analog signal converter 193 and input to the microcomputer 196. The absolute position identification signal according to the absolute position detection signal bar code conversion detection map is input to the microcomputer 196. [ The microcomputer 196 is activated by a power source provided from a power supply 199 and performs a function as shown in FIG. 7 through a memory unit 197. An incremental signal operation and an absolute value operation are performed to mix the signal, The final output signal can be transmitted and received to an external device.

As described above, according to the embodiment of the present invention, it is possible to solve the difficulty of the optical encoder which is difficult to manufacture in the hollow type through the absolute position calculation method and the signal processing method for high resolution, And the high-resolution processing can be realized.

In addition, based on the sinusoidal signal output through the segmented magnet permanent magnets 120, 130, and 140, the high-resolution processing as well as the absolute value operation can be implemented and transmitted through high-speed communication. It is possible to extend the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: High resolution encoder
120: magnet for incremental signal detection
130: Magnet for absolute position detection
140: magnet for multi-turn rotation detection
151: Printed Circuit Board for Incremental Signal Detection
153: Printed circuit board for absolute position detection
155: Printed circuit board for multi-turn rotation detection
170: Hall sensor module

Claims (12)

A permanent magnet fixed holder in which a permanent magnet is fixed;
A magnet for detecting an incremental signal that is inserted through the permanent magnet fixed holder and detects an incremental signal;
An absolute position detecting magnet which is inserted through the permanent magnet fixed holder and detects an absolute position; And
A magnet for multi-turn rotation detection inserted into the permanent magnet fixed holder and detecting multi-turn rotation;
/ RTI >
Wherein the magnet for detecting the incremental signal, the magnet for detecting the absolute position, and the magnet for detecting the multi-turn are disposed in a multi-layered structure along the longitudinal direction of the permanent magnet fixed holder.
The method according to claim 1,
A printed circuit board for incremental signal detection in which the magnets for detecting the incremental signal are mounted and detect a signal;
An absolute position detection printed circuit board on which the absolute position detection magnet is mounted to detect a signal; And
A multi-turn rotation detecting printed circuit board on which the multi-turn rotation detecting magnet is mounted to detect a signal;
Layered magnetoresistive permanent magnet high-resolution encoder.
3. The method of claim 2,
Wherein the magnet for detecting the incremental signal, the magnet for the absolute position detection, and the magnet for the multi-turn rotation detection are coupled to surround the incremental signal detection magnet, the absolute position detection magnet, And a Hall sensor module for converting the magnetic signal generated from the magnet for use in the electric signal into an electric signal and reading the electric signal.
The method of claim 3,
The Hall sensor module includes:
A hall sensor block for detecting an incremental signal for receiving a magnetic signal from the magnet for detecting the incremental signal and converting it into an electric signal; And
And a hall sensor block for absolute position detection that receives a magnetic signal from the absolute position detecting magnet and converts it into an electric signal.
5. The method of claim 4,
Wherein the signal detected by the incremental hall sensor block for incremental signal detection is represented by a sinusoidal output waveform and the sinusoidal output waveform is AD-processed to be expressed by an AD arithmetic waveform.
6. The method of claim 5,
The pulse of the sine wave output waveform detected through the incremental signal detecting Hall sensor block outputs 32 sinusoidal pulses in one cycle as N and S poles and AD-amplifies the output pulses as 32 * n The number of waveforms after AD processing) is doubled, and when the AD resolution is ¹² bits, n becomes 2 ¹² , resulting in a total resolution of 32 * 4096. This is a multi-layer segmentation magnet type permanent magnet type high resolution encoder.
5. The method of claim 4,
The information processed through the absolute position detection Hall sensor module and the absolute position detection PCB may be represented by an absolute position Hall sensor array output signal according to position and the N pole is set to 1 and the S pole is set to 0 Multilayer segmentation type permanent magnet type high resolution encoder that converts absolute position detection signal into bar code when binarization.
5. The method of claim 4,
Further comprising a signal processing section for processing a signal from the hall sensor module,
The signal processor processes the analog signal through the hall sensor module after performing the division magnetization of the magnets for detection, then bar-codes the signal generated by the hall sensor module to calculate an absolute position, And outputs the signal directly to the operation information, and outputs the signal directly.
A signal processing method of a multi-layer split magnet type permanent magnet type encoder according to claim 4,
An incremental signal processing step of processing a signal output from the incremental signal detection hall sensor block;
An absolute position processing step of processing the signal output from the absolute position detection hall sensor block; And
A signal transmission step of transmitting the signal processed in the incremental signal processing step and the absolute position processing step;
And a signal processing method of the multi-layer split magnet type permanent magnet encoder.
10. The method of claim 9,
In the incremental signal processing step, a signal output from the incremental signal detecting hall sensor block is converted into a digital signal through an analog signal input, subjected to analog interpolation processing, converged in a digital conversion, A method of signal processing of a layer division magnetoresistive permanent magnet type encoder.
11. The method of claim 10,
In the absolute position processing step, the signal output from the absolute position detection Hall sensor block is pulse-converted into a rectangular wave through an analog signal input, subjected to a magnetic pole discrimination process, and then subjected to a bar code signal process to perform an absolute value operation. A method of signal processing of a segmented magnet type permanent magnet encoder.
12. The method of claim 11,
A signal outputted from the hall sensor block for detecting the incremental signal is connected to a first analog amplifier and a signal outputted from the hall sensor block for absolute position detection is connected to a second analog amplifier, 1 analog signal converter, the second analog amplifier is connected to a second analog signal converter, the first analog signal converter is connected to the microcomputer through an AD converter or a digital signal converter, Wherein the microcomputer is connected to the microcomputer, the microcomputer is connected to a memory unit and a power supply, and the microcomputer is connected to a transmission / reception signal processor.

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