JPH0850528A - Pen point device diagnostic method - Google Patents

Abstract

PURPOSE:To decide normal or failure with high accuracy and to reduce failure caused by any artificial error by preparing a straight line expression by the method of least squares while using a measured coordinate group inputted onto an input board by using a pen, calculating expected coordinates and comparing them with the measured coordinate group. CONSTITUTION:An operator draws a diagonal on the input board of a pen point device 10 by using a stylus pen 9 just as tracing a diagonal 11 displayed while using a ruler 14. With this work, coordinate positions on the input board are detected and a diagnostic program can acquire all the coordinates on the input board detected by an antenna array. When the input of the measured coordinate group is detected, the diagnostic program prepares the expression of a straight line composed of inputted coordinates from all the measured X and Y coordinates by using the method of least square. Next, all the measured X and Y coordinates are substituted into this straight line expression, all the expected XYS coordinates are calculated, the respective coordinates are compared and when its difference is settled within the range of allowable error provided for the diagnostic program, normality is judged but when it gets out of the range, abnormality is judged and displayed on an LCD 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for diagnosing a pen point device, which is represented by a digitizer or a tablet, and which obtains input coordinates by touching an input plate with a pen-shaped object.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a conventional system for diagnosing a pen-point device. The pen-point device shown in this figure is of an electromagnetic induction type and LC
It is assumed that a "pen input personal computer", which is configured to be used in combination with D (liquid crystal display), is used. In the figure, 1
Reference numeral 8 is a diagnostic program, which is actually a CPU, but here it is a diagnostic program for convenience of explanation. 19 is a display controller connected to this diagnostic program, 8 is an LCD used for displaying instructions to the operator and diagnostic information,
Reference numeral 10 is a pen point device composed of an input plate and a controller. The stylus pen 9 tip is LC
When touching or approaching D8, pen point device 17
The antenna array inside recognizes the tap position, and the controller of the pen point device 17 generates coordinates and reports them to the diagnostic program 18. The antenna array 17 detects tap positions corresponding to the X axis and the Y axis of the input plate.

FIG. 5 is a schematic view for carrying out a diagnosis using a conventional diagnosis method used for the coordinate accuracy diagnosis of the pen point device 10. In FIG. 5, the LCD 8 is placed on the pen point device 10. Reference numeral 20 is a cross displayed on the LCD 8 to inform the operator of the position to be tapped on the pen point device 10.

FIG. 6 shows a conventional diagnosis method that we have used for coordinate detection diagnosis of the pen point device 10.
It is the schematic which implements a diagnosis. In FIG. 6, the LCD 8 is placed on the pen point device 10. Reference numeral 21 denotes an arrow cursor displayed on the LCD 8 at the position of the stylus pen 9 on the pen point device 10.

The diagnostic method shown in FIG. 5 will be described. The operator has four crosses 20 displayed on the LCD 8.
Tap with the stylus pen 9 at the center of. The diagnostic program 18 compares the four actually measured coordinates obtained by the current tap with the expected coordinates that the diagnostic program 18 has, and determines whether the coordinate accuracy is acceptable or not. Here, the four expected coordinates are created by a calculation formula that the diagnostic program 18 has, and the formula transforms the coordinates of the pen point device 10 and the coordinates of the LCD 8. It is realized by the).

The diagnostic method shown in FIG. 6 will be described. The operator taps on the LCD with the stylus pen 9.
The diagnostic program 18 generates the LCD coordinates based on the detected coordinates so that the arrow cursor 21 is displayed at the tapped position, based on the formula generated by the calibration that has been performed in advance, and displays the coordinates at the corresponding position. Display it. The operator confirms that the position of the stylus pen 9 and the arrow cursor 21 displayed on the LCD 8 are displayed corresponding to the same position. This arrow cursor 2
The diagnostic program 18 controls 1 to move along with the movement of the stylus pen 9. Therefore, the operator taps various positions on the input plate detected by the antenna array 17 with the stylus pen 9 to determine whether or not the coordinates of the input plate are detected.

[0007]

The conventional method for diagnosing the pen point device shown in FIG. 5 requires time and effort to carry out calibration in advance. If the pass / fail judgment is negative, is it a human error due to calibration failure?
Is the coordinate accuracy of the pen point device 10 defective?
If you don't try it again, you won't know on the spot. The problem is that the accuracy of the coordinate accuracy of the other positions on the input plate of the pen point device 10 is not diagnosed because of the coordinate accuracy of only the points of the four crosses 4 on the pen point device 10. was there.

Further, in the method for diagnosing the pen point device shown in FIG. 6, since the operator makes the pass / fail judgment, there is a possibility that the judgment standard may vary depending on the condition of the operator at that time. In addition, when there are a plurality of operators, there is a possibility that the judgment criteria may vary. It takes time and effort to carry out calibration in advance. Stylus pen 9
If the position of and the position of the arrow cursor 21 are deviated, is it a human error due to calibration failure?
Is it a problem of the coordinate detection of the pen point device 10,
If you don't try it again, you won't know on the spot. Since the pass / fail judgment is visual, there is a problem that a coordinate detection defect with high accuracy cannot be detected.

The present invention has been made in order to solve the above problems, and it is not necessary to perform calibration, and all the coordinate detection functions on the input plate detected by the antenna array of the pen point device are performed. I can diagnose
It is an object of the present invention to provide a pen point device diagnosing method capable of making a pass / fail judgment with high accuracy by a diagnostic program, reducing a false judgment due to an operator's human error, and allowing any operator to make a diagnosis under the same conditions.

[0010]

According to another aspect of the present invention, there is provided a pen point device diagnosing method including a step of inputting a measured coordinate group by drawing a straight line on an input plate using a pen, and the inputted measured coordinate group. And a step of generating a linear equation of the measured coordinate group by the least squares method, the expected coordinate group is calculated by substituting the measured coordinate group into the linear equation, the measured coordinate group and the expected coordinate are compared, and the measured coordinate group is calculated. Determining the adequacy of the group.

The pen point device diagnosis method according to a second aspect is characterized in that the straight line is a diagonal line.

The pen point device diagnosis method according to claim 3 is characterized in that a straight line is drawn by a non-metal ruler.

[0013]

According to the pen point device diagnosis method of claim 1,
Input a measured coordinate group by drawing a straight line on the input plate with a pen, generate a linear equation of the measured coordinate group by the least squares method using the measured coordinate group, and use the linear equation to calculate the expected coordinate and the measured coordinate. The coordinate accuracy of the pen point device is diagnosed by comparing the groups and determining the validity of the actually measured coordinate group.

According to the pen point device diagnosis method of the second aspect, a measured coordinate group is input by drawing a diagonal line using a pen on the input plate, and the measured coordinate group is used to calculate the measured coordinate group by the least square method. A linear equation is generated, the expected coordinates by the linear equation are compared with the actually measured coordinate group, and the validity of the actually measured coordinate group is judged to diagnose the coordinate accuracy of the pen point device.

According to a third aspect of the pen point device diagnosis method, a group of measured coordinates is input by drawing a straight line with a pen on a non-metallic ruler on an input plate, and the least squares method is used by using the group of measured coordinates. A linear equation of the actual measurement coordinate group is generated by, the expected coordinate by the linear equation is compared with the actual measurement coordinate group, and the validity of the actual measurement coordinate group is judged to diagnose the coordinate accuracy of the pen point device.

[0016]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic flowchart showing the present diagnostic method. FIG. 2 is a schematic diagram in which a diagnosis is carried out using this diagnosis method. The pen-point device shown in this schematic is an electromagnetic induction type device, and is assumed to be a "pen-input personal computer" that is used in combination with an LCD. In step 1, the diagnostic program 18 clears the LCD 8 screen. In step 2, the diagnostic program 18 displays the diagonal line 11 on the LCD 8 so that the operator can easily draw a diagonal line on the input plate of the pen point device 10 with the stylus pen 9. Further, in order to notify the diagnostic program 18 of the end of the input of the actually measured coordinate group, the frame line 12 at the end position is displayed. The diagnostic program 18 knows the coordinates of the end zone 13 in advance. Step 3
Then, the diagnostic program 18 displays a message 15 indicating the work capacity to the operator. In step 4, the operator uses the acrylic ruler 14 to draw a diagonal line on the input plate of the pen point device 10 with the stylus pen 9 as if tracing the displayed diagonal line 11. FIG. 3 shows an image of the coordinate position detected on the input plate of the pen point device 10 by this work.
In this figure, 16 is a point indicating the detected coordinate position. As a result, the diagnostic program 18 can obtain all the coordinates on the input plate detected by the antenna array 17. The pen point device is the host CPU 18
The coordinate detection capability reported to is usually 50 to 300 per second.
This is because it takes about 2 seconds to draw the diagonal line because it is about the number of times, and it can be said that the coordinates 16 acquired by the diagnostic program this time sufficiently cover the area detected by the antenna array 17. In step 5, the operator taps the end zone 13. This enables the diagnostic program 18
Detects the end of input of the measured coordinate group. In step 6,
The diagnostic program 18 uses the least squares method from all the measured XY coordinates to create a straight line expression composed of the input coordinates.
The method of creating the data will be described. There are n sets of measured coordinates in total, and each coordinate is (xi, yi) (i = 1, 2, ...,
n). The average value of x and y is x- and y-, the sum of squares of x is S _X , and the sum of products of x and y is S _XY .

[0017]

[Equation 1]

From these, a and b of the straight line y = ax + b are obtained by the equation 2.

[0019]

[Equation 2]

In step 7, the diagnostic program 18 substitutes all the measured XY coordinates into the linear equation created above to obtain the total expected XY.
Find the coordinates. Next, each coordinate is compared, and if the difference is within the allowable error range of the diagnostic program 18, it is determined to be normal, and if it is out of the range, it is determined to be abnormal, and the fact is displayed on the LCD 8. Here, in order to obtain the expected XY coordinates, y = ax in the case of the X coordinate
Substitute the actually measured y coordinate for + b. Y = ax for Y coordinate
Substitute the actually measured x coordinate for + b.

According to this embodiment, the measured coordinate group is input by drawing a diagonal line on the input plate of the pen point device 10 with the stylus pen 9, and the expected coordinate is obtained from the linear equation of this coordinate group obtained by the least square method. By calculating and comparing both, a highly accurate diagnosis can be realized. Moreover, by inputting the actually measured coordinate group by drawing a diagonal line, the coordinate detection diagnosis of the antenna line for detecting the coordinate of the pen point device can be easily performed at one time. Furthermore, by drawing a diagonal line using an acrylic ruler when inputting the measured coordinate group,
In the case of an electromagnetic pen point device, the pen point device can be diagnosed without being affected by fluctuations in detected coordinates from other radio waves.

Example 2. In the above embodiment, the actually measured coordinate group is input by drawing a diagonal line on the input plate of the pen point device 10 with the stylus pen 9, but it goes without saying that the measured coordinate group is not limited to the diagonal line, and the coordinate detection diagnosis of the antenna line is performed. Any straight line may be used as long as it is possible to perform all at once, and the same effect as that of the above-described embodiment can be obtained.

Example 3. Further, in the above embodiment, in the input of the actual measurement coordinate group, the diagonal line is drawn by using the acrylic ruler, but it is not limited to the acrylic ruler, and the detected coordinates may vary from other radio waves. As long as it is not affected, the same effect as that of the above-mentioned embodiment can be obtained.

[0024]

According to the pen point device diagnosis method of the first aspect, the step of inputting the actually measured coordinate group by drawing a straight line on the input plate using a pen, and the minimum by using the inputted actually measured coordinate group. Validity of the measured coordinate group by generating a linear equation of the measured coordinate group by the square method, calculating the expected coordinate by substituting the measured coordinate group into the linear equation, and comparing the measured coordinate group and the expected coordinate. And a step of determining. Therefore, highly accurate diagnosis can be performed.

According to the pen point device diagnosis method of the second aspect, since the straight line is a diagonal line, the coordinate detection diagnosis of the antenna line can be easily performed at one time.

According to the pen point device diagnosis method of the third aspect, since the straight line is drawn by the non-metal ruler, it is not affected by other radio waves.

[Brief description of drawings]

FIG. 1 is a schematic flow chart diagram showing a first embodiment of the present invention.

FIG. 2 is a schematic diagram of performing a diagnosis showing the first embodiment of the present invention.

FIG. 3 is a diagram showing an image of coordinate positions detected on the input plate of the pen point device showing the first embodiment of the present invention.

FIG. 4 is a system configuration diagram for diagnosing a pen-point device showing a conventional example.

FIG. 5 is a schematic diagram of performing a diagnosis by using a conventional diagnosis method used for a coordinate accuracy diagnosis of a pen point device showing a conventional example.

FIG. 6 is a schematic diagram of performing diagnosis using a conventional diagnosis method used for coordinate detection diagnosis of a pen point device showing a conventional example.

[Explanation of symbols]

8 LCD, 9 stylus pen, 10 pen point device, 11 diagonal, 12 end border, 13 end zone, 14 acrylic ruler, 15 message, 1
6 points indicating detected coordinate positions, 17 antenna array, 18 diagnostic program (host CPU), 19 display controller, 20 cross, 21 arrow cursor.

Claims (3)

[Claims] 1. A method for diagnosing a pen point device, comprising: a. Inputting an actual measurement coordinate group by drawing a straight line using a pen on an input plate, b. Generating a linear equation of the measured coordinate group by the least squares method using the input measured coordinate group, c. Substituting the actually measured coordinate group into the linear equation, calculating expected coordinates, comparing the actually measured coordinate group and expected coordinates, and determining the validity of the actually measured coordinate group, 2. The pen point device diagnosis method according to claim 1, wherein the straight line is a diagonal line. 3. The pen point device diagnosis method according to claim 1, wherein a straight line is drawn with a non-metallic ruler.