JP2005037208A - Rom accuracy correction method for angle sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform error correction of all points of an interpolation signal and a fundamental wave component by separating a ROM into two kinds. <P>SOLUTION: In this ROM accuracy correction method for an angle sensor, a wide error component 10a of the fundamental component 10 and a narrow error component of the interpolation signal 11 are measured by use of an angle calibration tester, the errors are written in the ROM via a two-way serial communication line, and the ROM is separated into two kinds to perform single or cooperative correction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ROM accuracy correction method of an angle sensor, and in particular, the accuracy of all points can be corrected by an efficient usage method by dividing the ROM into two types for wide correction and narrow correction, and using them separately. It relates to new improvements to make it possible.
[0002]
[Prior art]
The ROM accuracy correction method for this type of angle sensor that has been used in the past is only performed in-house and is not disclosed in the patent literature that shows the method, but is stored in the ROM. The measured angle data was compared with reference data with rough measurement points, and error correction was performed.
[0003]
[Problems to be solved by the invention]
Since the conventional ROM accuracy correction method of the angle sensor is configured as described above, the following problems exist.
That is, if the resolution of the angle sensor is too high, it is impossible to correct all the points of the fundamental wave component and the interpolation signal in relation to the capacity of the ROM.
In addition, with a non-linear error curve, straight line approximation error correction cannot be performed at present.
[0004]
The present invention has been made to solve the above-described problems. In particular, the ROM is divided into two parts for wide correction and narrow correction, and an efficient usage method by using two types separately, An object of the present invention is to provide a ROM accuracy correction method of an angle sensor that can correct the accuracy of all points.
[0005]
[Means for Solving the Problems]
The angle sensor ROM accuracy correction method according to the present invention is the angle sensor ROM accuracy correction method in which the angle sensor ROM is corrected, and the wide error component of the fundamental wave component of the angle sensor and the narrow error component of the interpolation signal. A second step of creating an accuracy correction table written in the ROM via a bi-directional serial communication line with the error measured in the first step as a correction value, Comprising the third step of reading and checking the contents of the write accuracy correction table, the ROM has a separate for the wide error component and for the narrow error component, and can be corrected independently or cooperatively. It is a method.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a ROM accuracy correction method for an angle sensor according to the present invention will be described with reference to the drawings.
First, as shown in FIGS. 2 and 3, a wide error component 10a of a fundamental wave component 10 of an angle sensor (not shown) and a narrow error component 11a of an interpolation signal 11 are converted into a highly accurate angle calibration tester (not shown). ) To measure accurately.
[0007]
As described above, the wide error component 10a and the narrow error component 11a measured in advance are written as correction values in the ROM of the angle sensor via a well-known bidirectional serial communication line (not shown) to create an accuracy correction table. Thus, a narrow-wide error total error curve 12 is obtained.
The correction value written in the accuracy correction table can be read and the above-described writing check can be performed.
[0008]
Although not shown, the ROM has a wide correction and a narrow correction, that is, the wide error component 10a and the narrow error component 11a, which are separated as shown in FIGS. Alternatively, any correction of cooperation is possible as shown in FIG.
Further, the above-described wide correction and narrow correction are configured so as to ensure monotonicity (each independently performing correction).
Note that it is checked whether there is a possibility of a monotonic error from the wide and narrow correction values described above, and if there is a possibility, the basic accuracy can be readjusted.
[0009]
【The invention's effect】
Since the ROM accuracy correction method of the angle sensor according to the present invention is configured as described above, the following effects can be obtained.
In other words, the ROM can be divided into wide correction and narrow correction, and two types of efficient usage methods can be used to correct all the points of the interpolation signal and the fundamental wave component. Supply.
In addition, since a ROM such as a flash memory and a serial bidirectional communication line are used, the correction work is facilitated, and the optimum correction can be performed with a simple work.
[Brief description of the drawings]
FIG. 1 is a characteristic diagram showing a blow-wide error total error curve in a ROM accuracy correction method for an angle sensor according to the present invention.
FIG. 2 is a characteristic diagram showing a narrow error component of the interpolated signal of FIG.
FIG. 3 is a characteristic diagram showing a wide error component of the fundamental wave component of FIG. 1;
[Explanation of symbols]
10 fundamental wave component 10a wide error component 11 interpolation signal 11a narrow error component

Claims (1)

In the angle sensor ROM accuracy correction method for correcting the angle sensor ROM,
A first step of measuring a wide error component of the fundamental wave component of the angle sensor and a narrow error component of the interpolation signal using an angle calibration tester;
A second step of creating a writing accuracy correction table in the ROM via the bidirectional serial communication line using the error measured in the first step as a correction value;
Comprising the third step of reading and checking the contents of the write accuracy correction table, the ROM has a separate for the wide error component and for the narrow error component, and can be corrected independently or cooperatively. A ROM accuracy correction method for an angle sensor, characterized in that:

Images