JP2004239879A - Waveform storage and method of setting waveform determination area - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and accurately set a waveform determination area. <P>SOLUTION: This waveform storage is equipped with an input part 12, a data storage memory 13 to be stored with waveform data taken in from the input part 12, a program memory 14 for holding a program, a central processing means 15, and an input-output means 16. The storage memory 13 is equipped with a waveform storage area to be stored with a plurality of good-item waveform data, and a memory area for holding data the same as the stored data as backup data. The storage area is demarcated in a closed space where the good-item waveform data are parallelized to a display screen of the input-output means 16, and stored data can be held in a state where stored data deviating from the closed space are marked out. The stored data are converted into image data wherein exclusive ORs are individually found between respective corresponding data of the backup data to make the closed space an inside-bored closed space, and an waveform determination area can be displayed on the display screen. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique relating to a waveform storage device and a method of setting a waveform determination area, which can determine the suitability of an actually measured waveform with high accuracy by a simple operation.
[0002]
[Prior art]
2. Description of the Related Art In a production line, a characteristic test for measuring a waveform distortion factor, a crest factor, and the like has been conventionally performed in order to determine the quality of a product. In the determination of the actually measured waveform performed at this time, an area between predetermined upper limit data and lower limit data is set as a waveform determination area for each sampling, and all of the actually measured waveforms are positioned within the waveform determination area. The appropriateness (OK) is judged as being true, and the unsatisfactory judgment is made (NG) if any part is out of alignment (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Publication No. 5-39490 (page 1, right column, FIG. 17)
[0004]
FIG. 7 is an explanatory diagram illustrating a conventional method of setting a waveform determination area as shown in FIG. 17 of Patent Document 1, for example, by digitizing one analog waveform measured as a good waveform. After the data is captured and stored in the memory, a “waveform capture” command is executed by a key operation to capture the waveform 2 on the editor screen 1 as shown in FIG.
[0005]
Thereafter, a "parallel movement" command is executed by a key operation, and the area of the waveform 2 is enlarged in the up, down, left, and right directions indicated by arrows in FIG. 7 (a) to expand the waveform determination area as shown in FIG. 7 (b). 3, the actually measured waveforms respectively taken from each channel are compared in relation to the waveform determination area 3 to determine whether or not the waveform is appropriate.
[0006]
[Problems to be solved by the invention]
However, in the case of using the waveform determination area setting method shown in FIG. 7, since only one waveform 2 can be captured as a non-defective waveform, it is determined how good the non-defective level of the reference non-defective waveform is. It was difficult to do. For this reason, in some cases, a waveform determination area with a biased margin is created based on the waveform 2 at the non-defective level just before the boundary, and the reliability of the determination accuracy when determining the suitability of each actually measured waveform is impaired. There was an inconvenience.
[0007]
The present invention has been made in view of the above problems in the prior art, and provides a waveform storage device and a waveform determination area setting method capable of easily creating a more accurate waveform determination area using a plurality of acquired non-defective waveform data. The purpose is to provide.
[0008]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and a first invention (apparatus) of the present invention stores an input unit for capturing a waveform signal as digitized waveform data, and stores the captured waveform data. A waveform storage device including at least a data storage memory, a program memory for holding necessary programs in a readable manner, a central processing unit (CPU) for arithmetic control, and an input / output unit including a display and an external storage device. The data storage memory includes a waveform data storage area for storing a plurality of non-defective waveform data, and a memory area for holding the same data as the storage data of the waveform data storage area as back data; Defines non-defective waveform data in a closed space corresponding to a display screen constituting the input / output means, and defines the closed space as The stored data in which the remaining stored data is filled out can be freely held, and the stored data is individually exclusive with the corresponding data of the back data via the central processing means (CPU). It is characterized in that by taking a logical sum, the closed space is converted into image data that is a hollow closed space and can be freely displayed on the display screen as a waveform determination area.
[0009]
Further, the second invention (method) is a process of storing a plurality of non-defective waveform data digitized and taken into the apparatus main body together with the back data in a data storage memory, and a process of storing the data in a waveform data storage area of the data storage memory. A process of defining a plurality of stored non-defective waveform data in a closed space corresponding to a display screen constituting an input / output means via a boundary line, and a process of painting a portion of the waveform data storage area that is outside the closed space. The exclusive OR of each of the corresponding data of the current storage data and the back data in the waveform data storage area is individually calculated, and a hollow closed space for using the closed space as a waveform determination area. It is characterized by including at least a process of converting image data. In this case, the process may include a process of inverting the entirety of the image data in the waveform data storage area including the hollow space.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram showing a schematic configuration example of a first invention (apparatus) of the present invention. An entire waveform storage device 11 includes an input unit 12 for capturing a signal as digitized waveform data, A data storage memory 13 for storing fetched waveform data, a program memory 14 for reading and storing necessary programs, a central processing unit (CPU) 15 for arithmetic control, and an input / output including a display and an external storage device And means 16.
[0011]
The input unit 12 converts a signal (voltage) actually measured as analog data from a non-defective product serving as a reference into a digital signal, and obtains a non-defective waveform data as shown in FIG. W (W _{1 to} W ₃ ) can be taken into the apparatus main body side.
[0012]
The data storage memory 13 composed of a video memory (VRAM) or the like stores the captured non-defective waveform data W (W _{1 to} W ₃ ) in a readable manner, for example, in a matrix of 400 dots in the vertical direction and 500 dots in the horizontal direction. Has a changed waveform data storage area 23. The waveform data storage area 23 saves the same waveform data as the non-defective waveform data W (W _{1 to} W ₃ ) stored as shown in FIG. There is also a separate memory area that can be held.
[0013]
The program memory 14 is formed of a ROM that can readably store a program for causing the central processing unit (CPU) 14 to perform necessary arithmetic and control processing.
[0014]
The central processing means (CPU) 15 can control the whole operation in accordance with the operation input status such as a key operation input from an operation unit (not shown), and analyzes the waveform data stored in the data storage memory 13. Then, the data can be output to the input / output means 16 or necessary data can be received from the output means 16.
[0015]
The input / output means 16 is configured to include a display such as an LCD, and an external storage device such as an HDD in which a program for creating a waveform determination area is stored as a file. In this case, if the input / output means 16 is a display, the waveform (voltage) which is a temporal change of the signal (voltage) has a vertical axis representing a voltage axis (voltage) as shown in FIGS. V), and the horizontal axis is displayed on the display screen 26 as the time axis (Sec).
[0016]
The display screen 26 (see FIGS. 5 and 6) provided on the display serving as the input / output means 16 has a maximum value line 1 which is a continuation of the upper limit value of the plurality of non-defective waveform data W (W _{1 to} W ₃ ). _1, so that it is possible to appropriately set displays the waveform judgment area E made of a strip-shaped region of a predetermined width which is defined by the minimum line l ₂ is a continuous lower limit.
[0017]
FIG. 2 is a flowchart showing a processing procedure of a second invention (method) applied to the (device) of the first invention having such a configuration, and is shown in FIGS. 3 (a) to 3 (d). The details will be described below with reference to a corresponding schematic diagram of the waveform data storage area 23 shown as.
[0018]
FIG. 3A exemplifies a storage state of the waveform data in the waveform data storage area 23 in the data storage memory 13. Of the total memory capacity prepared as the waveform data storage area 23, the area surrounded by a broken line is illustrated. The portion is secured as a display screen corresponding area 33 in relation to the display screen 26 provided in the display, and the non-defective waveform data W ( W ₁ to _W-3) are stored, respectively.
[0019]
First, when the setting process of the waveform determination area is started, each broken line position in the vertical direction that divides the display screen corresponding area 33 in the waveform data storage area 23 is displayed on the display screen 26 in the horizontal direction. Therefore, a process is performed in which the boundary lines L ₁ and L _{2 corresponding} to this are drawn and arranged for one line with black dots. Note that these boundaries L ₁ and L ₂ indicate the maximum width of the display screen 26 in the left-right direction, and are not displayed on the display screen 26 so as to be visible.
[0020]
Thus, as shown in FIG. 3 (b), good waveform data _{W (W} 1 ~W _3), in its starting end side boundary _{L 1,} a result of the termination side are partitioned respectively by the boundary line _{L 2,} as a display range Is formed.
[0021]
After the closed space 43 is defined by the non-defective waveform data W (W _{1 to} W ₃ ) and the boundary lines L ₁ and L ₂ , the remaining space deviates from the maximum width of the closed space 43 in the vertical direction. As shown in FIG. 3 (c), the entire waveform data storage area 23 is painted using a known painting function.
[0022]
After the portions other than the closed space 43 in the waveform data storage area 23 in the data storage memory 13 are painted out, the stored data in the waveform data storage area 23 in the state shown in FIG. By performing an exclusive OR operation on each of the corresponding data between the stored data in the state shown and the back data separately saved under the same pattern, the non-defective waveform data W (W _{1 to} W ₃ ), All the waveform lines located in the closed space 43 are erased.
[0023]
As a result, the data stored in the waveform data storage area 23 is converted into data in which the closed space 43 becomes a hollow closed space 53 as shown in FIG. The image data 63 on a white background can be obtained.
[0024]
After the image data 63 shown in FIG. 3D is obtained in this way, the whole is inverted to black and white to convert it into inverted image data 73 shown in FIG. 4, and the process is terminated.
[0025]
FIG. 5 shows a setting example of the waveform determination area E when the inverted image data 73 shown in FIG. 4 is displayed on the display screen 26 provided on the display. The setting example of FIG. As shown, the image can be further inverted and displayed.
[0026]
For this reason, according to the present invention, a plurality of non-defective waveform data W (W _{1 to} W ₃ ) are overlaid on the waveform data storage area 23 of the data storage memory 13, so that a large number of small closed spaces intersect with each other. Even if a partition is formed, the waveform determination area E can be easily formed by a simple operation using exclusive OR without having to perform a complicated operation such as individually filling all the small closed spaces and setting the waveform determination area. Can be set to
[0027]
The storage data in the waveform data storage area 23 after the setting of the waveform determination area E can be changed to the storage pattern shown in FIG. 4 by simply inverting the storage pattern shown in FIG. Accordingly, the display pattern of the waveform determination area E on the display screen 26 can be appropriately selected from the pattern shown in FIG. 5 and the pattern shown in FIG.
[0028]
After setting the waveform determination area E in this way, if all of the waveform data taken in from each actual product is located in the waveform determination area E, it is determined that the waveform data is appropriate (OK), and any part of the waveform data is deviated. By setting the case as “NG” (NG), it is possible to accurately determine whether or not it is appropriate.
[0029]
The embodiments of the present invention have been described with reference to the illustrated examples, and specific embodiments thereof are not limited thereto. For example, the number of non-defective waveform data taken in to set the waveform determination area may be two or more. In addition, the propriety judgment using the waveform judgment area is determined to be negative (NG) when even part of the waveform data taken from the actual product is included in the waveform judgment area, and when all of them are out of the range. May be determined to be appropriate (OK). Further, the waveform determination area displayed on the display screen and the remaining portion can be displayed using an appropriate color as desired as long as they can be easily distinguished from each other. Furthermore, the waveform determination area displayed on the display screen is not limited to the display as the time-series data shown in FIGS. The X-axis is set to CH1 and the Y-axis is set to CH2 to observe the correlation between the two channels, that is, the XY display can be applied as it is.
[0030]
【The invention's effect】
As described above, according to the present invention, the waveform determination area can be set using a plurality of non-defective waveform data without setting based on one non-defective waveform data. A highly reliable determination can be made using the determination area.
[0031]
Also, by overlaying a plurality of non-defective waveform data on the waveform data storage area of the data storage memory, even if a large number of small closed spaces intersect with each other and are formed, a simple operation using exclusive OR can be performed with high accuracy. Can be easily set, so that the waveform determination operation can be performed smoothly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of a first invention (apparatus).
FIG. 2 is a flowchart illustrating an outline of a processing procedure of a second invention (method).
FIGS. 3A and 3B are schematic diagrams showing transitions of data processing in a waveform data storage area in a data storage memory as (a) to (d) in correspondence with the flowchart of FIG. 2;
FIG. 4 is an explanatory view schematically showing a state when storage data in a waveform data storage area in the state of FIG.
FIG. 5 is an explanatory diagram of a state when a waveform determination area is set on a display screen based on a correspondence relationship with FIG. 4;
FIG. 6 is a state explanatory view when the state of FIG. 5 is inverted again.
FIGS. 7A and 7B are explanatory diagrams illustrating a procedure for setting a waveform determination area for a display screen in a conventional waveform storage device as (a) and (b).
[Explanation of symbols]
11 Waveform storage device 12 Input unit 13 Data storage memory 14 Program memory 15 Central processing means (CPU)
16 input / output means 23 waveform data storage area 26 display screen 33 display screen corresponding area 43 closed space 53 hollow closed space 63 image data 73 inverted image data W (W _{1 to} W ₃ ) non-defective waveform data l ₁ maximum value line l ₂ Minimum value lines L ₁ , L ₂ Boundary line E Waveform determination area

Claims (3)

An input unit for receiving a waveform signal as digitized waveform data, a data storage memory for storing the captured waveform data, a program memory for holding necessary programs in a readable manner, and a central processing unit (CPU for arithmetic control) ) And a input / output means including a display and an external storage device.
The data storage memory includes a waveform data storage area for storing a plurality of non-defective waveform data, and a memory area for holding the same data as the storage data of the waveform data storage area as back data,
The waveform data storage area defines non-defective waveform data in a closed space corresponding to a display screen constituting the input / output means, and stores remaining data outside the closed space in a filled state. Data can be retained freely,
The stored data is individually exclusive-ORed with the corresponding data of the back data via the central processing unit (CPU) to convert the closed space into image data that is a hollow closed space. A waveform storage device, wherein the waveform is converted and displayed as a waveform determination area on the display screen. A process of storing a plurality of non-defective waveform data digitized and taken into the device body together with the back data in a data storage memory;
A process of defining a plurality of non-defective waveform data stored in the waveform data storage area of the data storage memory in a closed space corresponding to a display screen constituting input / output means via a boundary line;
A process of filling a portion of the waveform data storage area that deviates from the closed space,
An exclusive OR operation is separately performed between the corresponding data of the current data stored in the waveform data storage area and the corresponding data of the back data, and an image of a hollow closed space for using the closed space as a waveform determination area. A method for setting a waveform determination area, comprising at least a process for converting data. 3. The method for setting a waveform determination area according to claim 2, further comprising a process of inverting black and white of the entire image data in the waveform data storage area including the hollow closed space.

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