JP3098746B1 - One-rotation data processing method and apparatus - Google Patents

Abstract

Kind Code: A1 Since there is only one memory for storing correction data in the related art, it is necessary to access twice before and after to read a representative value at two locations, thereby shortening the read time. It was difficult and the speed of the correction process was slow. SOLUTION: One rotation data processing method and apparatus according to the present invention uses first and second memories (5, 5A) as memories,
In this configuration, the same correction data is stored in each memory (5, 5A), and each representative value (6, 7) is read out at the same time, so that the reading time can be shortened as compared with the conventional case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-rotation data processing method and apparatus, and more particularly to a method for separately representing representative values of front and rear position correction data by using first and second memories having the same correction data. The present invention relates to a novel improvement for shortening the time required for reading and correction processing by reading at the same time as compared with the related art.

[0002]

2. Description of the Related Art Conventionally, as a one-rotation data processing method and apparatus of this kind, a configuration shown in FIG. 2 has been employed. That is, what is indicated by reference numeral 1 in FIG. 2 is one-rotation data before correction obtained from the detection unit 2, and the one-rotation data 1 before correction is input to the one-rotation data latch unit 3 and the address generation unit 4. I have. The one-rotation data 1 before correction from the one-rotation data latch unit 3 is input to the calculation unit 4. The address 4a generated by the address generator 4 is input to the memory 5.

The memory 5 stores one rotation data 1 before correction.
Is stored in advance, and the representative value 6 of the front position correction data and the representative value 7 of the rear position correction data in the correction data read from the memory 5 are stored in the first latch section 8 and the second latch section 8, respectively. The data is latched by the latch unit 9 and sent to the arithmetic unit 4. The calculation unit 4 calculates the above-described one-rotation data 1A before correction and representative values 6 and 7 of the front and rear position correction data from the respective latch units 8 and 9 to obtain one-rotation data 1A after correction.
Is obtained.

[0004]

Since the conventional one-rotation data processing method and apparatus are configured as described above,
The following issues existed. That is, since there is only one memory for storing the correction data, and all the correction data is stored in this memory, storing all the correction data requires a large-capacity memory. Although the memory capacity was avoided by storing only the representative values of some points in the above, since the memory is only one, the representative values at the front and rear two locations are read from the memory. Must be accessed at least twice, and it has been difficult to shorten the time required for reading and correcting each representative value from the arithmetic unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, the first and second memories having the same correction data are used to calculate the representative values of the front and rear position correction data. An object of the present invention is to provide a one-rotation data processing method and apparatus in which the time required for reading and correction processing is shortened as compared with the related art by separately and simultaneously reading.

[0006]

According to the one-rotation data processing method of the present invention, the one-rotation data before correction obtained from the detection unit is corrected by the correction data stored in the memory, and the one-rotation data after correction is obtained. In the one-rotation data processing method, the first and second memories are used as the memories, the same correction data is stored in each memory, and the front position correction corresponding to the one-rotation data before correction from the first memory is performed. A method of obtaining the corrected one-rotation data after performing a calculation by simultaneously reading the representative value of the data and reading the representative value of the post-correction data corresponding to the one-rotation data before the correction from the second memory. And a one-rotation data process in which the one-rotation data before correction obtained from the detection unit is corrected by the correction data stored in the memory to obtain the one-rotation data after correction. An address generation unit to which the one-rotation data before correction is input, first and second memories connected to the address generation unit, and the one-rotation data before correction connected to each of the memories. An arithmetic unit for inputting the representative values of the front position correction data and the rear position correction data, which are simultaneously read from the first and second memories and correspond to the one rotation data before correction, to the arithmetic unit for correction This is a configuration in which one rotation data is obtained.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the rotation data processing method and apparatus will be described. The same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, the data indicated by reference numeral 1 is one rotation data before correction obtained from the detection unit 2, and the one data 1 before correction is directly input to the calculation unit 4 and input to the address generation unit 4. I have.

The address 4 from the address generator 4
a and 4b are input to the first memory 5 and the second memory 5A, respectively, and are representative values 6 of the front position correction data and representative values 7 of the rear position correction data separately read from the memories 5 and 5A.
Is configured to be directly input to the arithmetic unit 4.

Next, the operation will be described. First, the first
Since the correction data for one rotation is previously stored in the memory 5 and the second memory 5A with the same data content,
When the one-rotation data 1 before correction from the detection unit 2 is input to the arithmetic unit 4 and simultaneously to the address generation unit 4, the addresses 4a and 4b from the address generation unit 4 are simultaneously stored in the memories 5 and 5A. The data is supplied and accessed, and the representative value 6 of the previous position correction data is supplied from the first memory 5 to the second memory 5.
From A, the representative value 7 of the rear position correction data is simultaneously read out by one access, and is simultaneously input to the arithmetic unit 4. The arithmetic unit 4 corrects the one-rotation data 1 before correction based on the representative values 6 and 7 described above, so that the one-rotation data 1A after correction can be output from the calculation unit 4. The same correction data stored in each of the memories 5 and 5A stores only representative values of several points in one rotation as in the conventional example, and stores data located between the representative values. When obtaining, the correction data at that position is calculated by the arithmetic unit 4 from the representative values before and after that, and the capacity of each of the memories 5 and 5A itself is reduced. The number of memories 5 and 5A may be two or more.

[0010]

The method and apparatus for processing one rotation data according to the present invention are configured as described above, so that the following effects can be obtained. That is, since different correction data are read simultaneously by one access using a plurality of memories, the time required for the correction processing for obtaining one rotation data after correction can be shortened as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a method and an apparatus for processing one rotation data according to the present invention.

FIG. 2 is a block diagram showing a conventional configuration.

[Explanation of symbols]

 Reference Signs List 1 1 rotation data before correction 1A 1 rotation data after correction 2 Detector 4 Operation unit 5, 5A First and second memories 6 Representative value of front position correction data 7 Representative value of rear position correction data

Claims (2)

(57) [Claims] 1. One-rotation data obtained by correcting one-rotation data (1) before correction obtained from a detection unit (2) using correction data stored in a memory to obtain one-rotation data (1A) after correction. In the processing method, the first and second memories (5, 5A) are used as the memories, and the same correction data is stored in each memory (5, 5A), and the first correction data from the first memory (5) is stored. Reading the representative value (6) of the front position correction data corresponding to the rotation data, and reading the representative value (7) of the rear position correction data corresponding to the one rotation data before correction (1) from the second memory (5A). And performing a calculation by simultaneously performing the reading of the data and obtaining the corrected one-rotation data (1A). 2. One-rotation data obtained by correcting one-rotation data (1) before correction obtained from a detection unit (2) with correction data stored in a memory to obtain one-rotation data (1A) after correction. An address generation unit (4) to which the one-rotation data before correction (1) is input;
A first and second memory (5, 5A) connected to (4), and an operation unit (4) connected to each of the memories (5, 5A) and receiving the one-rotation data (1) before correction. And the first and second memories (5,
5A), the representative values (6, 7) of the front position correction data and the rear position correction data corresponding to the one rotation data before correction (1) are input to the arithmetic unit (4) after correction. A one-rotation data processing device configured to obtain one-rotation data (1A).