KR100435588B1 - encoder multiplier using express micom and the method for multiplying encoder - Google Patents

Abstract

The present invention is easy to adjust because the encoder multiplies the encoder by measuring the maximum value and the minimum value of the input signal, and the circuit is extremely simple compared to the multiplier (several to several hundreds), and the numerical error in the smooth curve of the sin wave The present invention relates to an encoder multiplier using a high speed microcomputer to prevent tremor and allow accurate counting. The present invention checks whether a slip is performed and, as a result, checks whether an input sine wave is changed. If the result is a change in the input sine wave, check which phase has changed.If the result is a change in phase B, check the phase A to measure the maximum and minimum values of phase A. Check the B phase to measure the maximum and minimum of the B phase and check the level. Indicates an error, and when the level check is normally performed, the measured maximum and minimum values of each phase are stored, and the center value of the waveform is calculated. Also, + And- Calculate the travel direction, and if the travel direction is the reverse direction, calculate the travel distance, calculate the X multiplier according to the travel distance; if the travel direction is the forward direction, calculate the travel distance, and the travel distance By calculating the X-multiplier according to the multiplication, the encoder output waveform is multiplied correctly.

Description

Encoder multiplier using express micom and the method for multiplying encoder}

The present invention relates to an encoder multiplier using a high speed microcomputer,

In particular, it is easy to adjust because it measures and multiplies the maximum and minimum values of the input signal, and the circuit is extremely easy compared to the multiplier, and it prevents numerical errors and vibrations on smooth curves of sin waves and enables accurate length counting. The present invention relates to an encoder multiplier using a high speed microcomputer.

In general, encoder multipliers are used for position control in woodworking and cutting machines. These encoder multipliers must be able to process even decimal point information, and the position can be precisely measured only by reducing the influence of the ripple generated in the low speed region.

Looking at the conventional encoder multiplier as follows.

First, in the case of using the current loop (LOOP), there is a method of detecting the pulse generated from the encoder in the current loop time to take an average for each control period and multiply.

Another encoder multiplier includes an encoder multiplier that receives a pulse signal output from an external encoder (which can be mounted at a predetermined position of the device) and multiplies by an integer multiple. However, these conventional encoder multipliers have complicated adjustments, complicated circuits, numerical errors and tremors in smooth curves of sin waves, and accurate counting is not possible.

Accordingly, the present invention has been proposed to solve all the problems of the conventional encoder multiplication circuit as described above,

The object of the present invention is to adjust the multiplication by measuring the maximum and minimum values of the input signal, making it easy to adjust, the circuit being extremely simple compared to the multiplication factor, and the numerical error and tremor in smooth curves of sin waves. It is to provide an encoder multiplier using a high speed microcomputer to prevent and to accurately count the length.

Multiplier using a high speed microcomputer according to the present invention for achieving the above object,

A first overvoltage protection unit for blocking an overvoltage on an A phase of an input sine wave;

A second overvoltage protection unit for blocking an overvoltage on the B-phase of the input sine wave;

A reference voltage generator for generating a reference voltage by appropriately adjusting voltages through the first and second overvoltage protection units;

First and second voltage distribution units for respectively distributing the voltages output from the first and second overvoltage protection units to the inputs of the A / D converters of the subsequent stages;

The analog / digital converter for converting the voltages output from the first and second voltage dividers into digital signals;

A first voltage comparator for comparing the voltage output from the first overvoltage protection unit with the voltage generated from the reference voltage generator and generating an interrupt according to the result;

A second voltage comparator comparing the voltage output from the second overvoltage protection unit with the voltage generated from the reference voltage generator and generating an interrupt according to the result;

A microcomputer that operates by receiving a signal output from the analog / digital converter as a synchronous clock, outputs a pulse obtained by multiplying an input signal according to an interrupt output from the first and second voltage comparators, and processes an operation mode control signal. and;

The microcomputer is configured as a backup power supply for supplying power to the microcomputer for a predetermined time to maintain the data back-up function in case of power failure.

1 is a circuit configuration diagram of an encoder multiplier using a high speed microcomputer according to the present invention,

FIG. 2 is a timing diagram of each part of FIG. 1 in the case of 400 multiplier (multiplier is 100),

3 is the maximum, minimum, center + by the interrupt ,- Is a flow chart showing the operation flow of calculation, storage and multiplication and subtraction,

4 is an operation flowchart of a multiplier using a high speed microcomputer according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 110 ..... First and second overvoltage protection

120 ..... Reference voltage generator

130, 140 ..... First and second voltage divider

150, 160 ..... First and second voltage comparators

170 ..... analog to digital converter

180 ..... MICOM

190 ..... Back-up power supply

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

1 is a diagram illustrating a circuit configuration of a multiplier using a high speed microcomputer according to the present invention.

Here, reference numeral 100 denotes a first overvoltage protection unit for blocking an overvoltage on an A phase of an input sine wave, and includes diodes Z1 and Z2, and reference numeral 110 blocks an overvoltage on an input B phase of a sine wave. The second overvoltage protection unit is composed of diodes D4 and D5, and reference numeral 120 denotes a reference for generating a reference voltage by appropriately adjusting voltages through the first and second overvoltage protection units 100 and 110. As the voltage generator, it is composed of a resistor R6 and a voltage reference Z7.

In addition, reference numerals 130 and 140 denote first and second distributions of voltages output from the first overvoltage protection unit 100 and the second overvoltage protection unit 110, respectively, to suit the input of the A / D converter 170 at the rear stage. As the second voltage divider, resistors R1 and R2, and resistors R7 and R8, respectively.

In addition, reference numeral 170 denotes the analog-to-digital converter for converting the voltages output from the first and second voltage distribution units 130 and 140 into digital signals, respectively.

In addition, reference numeral 150 denotes a first voltage comparator for comparing the voltage output from the first overvoltage protection unit 100 with the voltage generated by the reference voltage generator 120 and generating an interrupt according to the result. Reference numeral 160 denotes a second voltage comparator for comparing the voltage output from the second overvoltage protection unit 110 with the voltage generated by the reference voltage generator 120 and generating an interrupt according to the result.

In addition, the reference numeral 180 operates by receiving a signal output from the analog-to-digital converter 170 as a synchronous clock, and inputs an input signal according to the interrupts output from the first and second voltage comparators 150 and 160. The microcomputer outputs a multiplied pulse and processes an operation mode control signal, and reference numeral 190 denotes a microcomputer that supplies power to the microcomputer 180 for a predetermined time so that the microcomputer 180 maintains a data back-up function in case of power failure. The up-up power supply is composed of a diode D1, a resistor R12, and a capacitor C2.

The operation of the encoder multiplier using the high speed microcomputer according to the present invention configured as described above will be described in detail with reference to the timing diagram of FIG. 2.

First, the first overvoltage protection unit 100 is composed of diodes Z1 and Z2 to remove the overvoltage on the A phase of the sine wave input as shown in FIG. 2A, thereby preventing damage to the latter device due to the overvoltage.

In addition, the second overvoltage protection unit 110 is also made of diodes Z4 and Z5 to remove the overvoltage on the B phase of the sine wave input as shown in FIG. 2B to prevent damage to the latter device due to the overvoltage.

Next, the reference voltage generator 120 is composed of a resistor (R6) and a zener diode (Z7) to properly adjust the voltages respectively output from the first and second overvoltage protection unit 100, 110 to be a reference The reference voltage is generated and input to the first voltage comparator 150 and the second voltage comparator 160, respectively.

On the other hand, the first voltage divider 130 is composed of voltage divider resistors R1 and R2 to match the voltage output from the first overvoltage protection unit 100 to the input voltage of the analog-to-digital converter 170 of the rear stage. The signal is divided by the voltage and input to one input terminal of the analog-to-digital converter 170.

Similarly, the second voltage divider 140 also includes voltage divider resistors R7 and R8 so that the voltage output from the second overvoltage protector 110 corresponds to the input voltage of the analog / digital converter 170 of the rear stage. And input to the other input terminal of the analog-to-digital converter 170.

Accordingly, the analog-to-digital converter 170 converts two input analog signals into digital signals, respectively, and inputs them into the microcomputer 180 as data D0 and D1, and simultaneously selects a chip select signal CS and a synchronous clock. Generates and transmits the CLK to the microcomputer 180.

The first voltage comparator 150 compares the voltage output from the first overvoltage protection unit 100 with the reference voltage generated by the reference voltage generator 120 and generates an interrupt according to the result of the microcomputer ( 180), an interrupt type generated at this time is shown in FIG. 2C.

In addition, the second voltage comparator 160 also compares the voltage output from the second overvoltage protection unit 110 with the reference voltage generated by the reference voltage generator 120 and generates an interrupt according to the result of the microcomputer ( 180), an interrupt type generated at this time is shown in FIG. 2D.

When the A and B phases of the sine wave input here are the same as those shown in FIGS. 2A and 2B, the sections are input to the microcomputer 180 in response to interrupts output from the first and second voltage comparators 150 and 160, respectively. The interrupt is a form as shown in Figure 2e.

As such, when two interrupts are input for one section, the microcomputer 180 selects an optimal sine wave through a program embedded therein, and generates an optimal multiplication pulse by applying a mathematical multiplication algorithm.

Here, the multiplication pulses generated for the output A phase have the form as shown in Fig. 2F, and the multiplication pulses generated for the output B phase have the form as shown in Fig. 2G.

If the input two sine waves are too distorted or too small to multiply, an error signal (ER), which is low, is generated and notified to the subsequent device.

Meanwhile, when a power failure occurs during operation, the microcomputer 180 may perform a back-up function to prevent data loss. For this purpose, the back-up power supply 190 may include a diode D1, a resistor R12, and a capacitor. (C2), when the power failure is supplied to the microcomputer 180 to supply the power charged in the capacitor (C2) for a moment to perform a data back-up function immediately in the microcomputer 180 when a power failure occurs.

Hereinafter, a process of generating a multiplication pulse through a mathematical algorithm in the microcomputer 180 will be described in detail.

First, a process of generating a multiplication pulse for two interrupts input for each section as shown in FIG. 2E will be described below.

In the following, a is A phase chord measurement, b is B phase chord measurement, M _ax A is A phase maximum, M _in A is A phase minimum, M _ax B is B phase maximum, M _in B is B phase minimum, CTA is Median A phase, CTB is median B phase, A is the upper limit of CTA,- A is the lower limit of the CTA, B is the upper limit of CTB,- B is the lower limit of CTB, ACCA is the current X multiplication equal to the charging value (range 00x to xxx), and K is the constant.

First, in any interval, A = 1, B = 1, b < In the case of B, a multiplication pulse is generated based on Equation 1 as follows.

B> In the case of B, a multiplication pulse is generated based on Equation 2 as follows.

Next, in any interval, A = 1, B = 0 and a < In the case of A, a multiplication pulse is generated based on Equation 3 as follows.

And a> In the case of A, a multiplication pulse is generated based on Equation 4 as follows.

In other cases, the multiplication pulse is generated by a method similar to the above-described equations [Equation 1] to [Equation 4].

Figure 3 is an interrupt is started by the change of Figures 2c, 2d, maximum, minimum, center value ,- This is a flow chart showing the operation of adding and subtracting only the calculation, storage, and multiplication.

First, in step S101 it is checked whether or not the sleep (Sleep). Here, the sleep state is an operation mode state at the time of power failure.

If the check result is not in the sleep state, it is checked whether or not the sine wave input in step S102 is changed. If the result is a change in the input sine wave, it is checked in step S103 which phase has changed.

If the result of the check is a change in phase B, phase A is checked in step S104 to measure the maximum and minimum values of phase A (steps S105 to S106).

If the result of the check is a change in phase A, phase B is checked in step S107 to measure the maximum and minimum values of phase B (steps S108 to S109).

Next, in step S110, the level is checked. As a result, if it is difficult to check the level due to the distorted waveform or the like, it is notified in step S111 that it is an error.

On the other hand, when the level check is made, the maximum and minimum values of each phase measured in step S112 are stored, and the center value of the waveform is calculated and stored in Equation 5 as follows.

Next, in step S113, And- Is calculated by Equation 6 as follows.

Next, in step S114, the direction of travel is determined. If the direction of travel is the reverse direction, in step S115, the X-multiplier (e.g., subtract 100 of the 100-multiplier plane) according to the section distance is subtracted to the number of pulses to be output.

In addition, when the traveling direction is the forward direction, in step S116, the X multiplier according to the interval distance is added to the number of pulses to be output.

4 is a flowchart illustrating a process of a multiplier using a high speed microcomputer according to the present invention.

In step S201, an initial value is set, and in step S202, a multiplier for each section is obtained by measuring A phase or B phase. That is, the body multiplication factor (ACCA) in the section for the current position is obtained.

In step S203, it is checked whether an interrupt has occurred. In step S204, whether or not an interrupt has occurred, it is checked whether or not it sleeps. As a result, it enters a sleep mode in step S205.

Then, in step S206, the value AAA for the previous position is subtracted from the ACCA value for the current position and added and subtracted to the number of pulses to be output.

In step S207, the values of the traveling directions for the A and the B are output by the number of pulses to be output through P8 and P9 of FIG.

In addition, in step S208, a function of correcting that a missing thing occurred during execution other than an interrupt is performed.

According to the present invention "multiplier using a high speed microcomputer" described above, since the encoder multiplies by measuring the maximum value and the minimum value of the input signal, there is an advantage that does not need to be adjusted or is easy to adjust.

It also has the advantage that the circuit is extremely simple compared to the multiplication factor.

It also has the advantage of avoiding numerical errors and tremors on smooth curves of sin waves and allowing accurate length counting.

Due to these advantages, there is an advantage that can be applied to machine tools that require precision.

Claims (5)

In the encoder multiplication device for position control of various machinery such as woodworking machine, cutting machine, A first overvoltage protection unit for blocking an overvoltage on an A phase of an input sine wave; A second overvoltage protection unit for blocking an overvoltage on the B-phase of the input sine wave; A reference voltage generator for generating a reference voltage by adjusting voltages through the first and second overvoltage protection units; First and second voltage distributors for respectively distributing voltages output from the first and second overvoltage protection units to inputs of a subsequent A / D converter; The analog / digital converter for converting the voltages output from the first and second voltage dividers into digital signals; A first voltage comparator for comparing the voltage output from the first overvoltage protection unit with the voltage generated from the reference voltage generator and generating an interrupt according to the result; A second voltage comparator comparing the voltage output from the second overvoltage protection unit with the voltage generated from the reference voltage generator and generating an interrupt according to the result; A microcomputer that operates by receiving a signal output from the analog / digital converter as a synchronous clock, outputs a pulse obtained by multiplying an input signal according to an interrupt output from the first and second voltage comparators, and processes an operation mode control signal. and; A multiplier using a high speed micom, characterized in that it comprises a back-up power supply (or EEPROM available) for supplying power to the microcomputer for a certain time to maintain the data back-up function in case of power failure. In the method of multiplying the encoder for the position control of various machinery such as woodworking machine, cutting machine, Checking whether the device is in a sleep state, and as a result, checking whether or not the input sine wave is changed, and when the check result is changed, checking which phase is changed; Checking phase A to determine maximum and minimum A phases if the phase B changes; Checking phase B if the phase A change results in measuring the maximum and minimum B phases; Checking the level and, if the level check is difficult, as a result of the distorted waveform, indicating an error, and if the level check is normally performed, storing the measured maximum and minimum values of each phase, and calculating the center of the waveform; After the above step + And- Calculating a; Determining a moving direction after the step, calculating a moving distance if the moving direction is in the reverse direction, and calculating an X multiplier according to the moving distance; If the traveling direction is the forward direction, calculating the moving distance, and calculating the X multiplier according to the moving distance comprising the step of multiplying the encoder using a high speed microcomputer. The method of claim 2, wherein the center value of the waveform is calculated based on the following equation. The method of claim 2, wherein the + And- The multiplication method using a high speed microcomputer, characterized in that the calculation based on the following equation. The method of claim 2, wherein if it is determined that the sleep state is a sleep state, Entering a sleep mode; Calculating the number of pulses to be output by subtracting the value AAA for all positions from the ACCA value for the current position; Outputting a value for a travel direction for A and B by the number of pulses to be output; Encoder multiplication method using a high-speed microcomputer, characterized in that for performing the step of correcting that something missing during execution other than interrupt.