JP2001305169A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distinctively and accurately grasp a physical quantity at a specific position of a body to be measured. SOLUTION: The magnetic field intensity map of the body to be measured is displayed in a 1st measurement map display region 64 on a display 44 and a picked-up image of the body to be measured is displayed in a 1st picked-up image display region 82; while a specific position of the electric field intensity map is indicated with a pointer 98, an auxiliary pointer 102 is displayed at a specific position in the picked-up image corresponding to the mentioned specific position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a display device for simultaneously displaying a captured image of an object to be measured and a measurement map based on measurement data corresponding thereto.

[0002]

2. Description of the Related Art For example, in a circuit board on which a large number of electronic components are mounted, when a magnetic field generated from each electronic component and a wiring between them affects other electronic components, the circuit may malfunction due to the influence. There is. Therefore, in order to avoid such a malfunction, it is necessary to measure the magnetic field strength in the circuit board or to predict the current, and to take measures such as electromagnetic shielding based on the data.

As a method of examining the distribution of physical quantities such as magnetic field strength in comparison with the arrangement of electronic components and the like on a circuit board, conventionally, measurement data is recorded on an image picked up by a CCD camera or the like on a circuit board. In some cases, measurement maps colored according to different colors are displayed in an overlapping manner.

However, in this method, since the captured image and the measurement map are superimposed, for example, electronic components and wiring patterns mounted at high density are hidden by the measurement map, and it is not possible to grasp an accurate correspondence. There are cases. Further, even when the color of the measurement map and the color of the electronic component or the like are similar colors, it is difficult to distinguish between them. Further, when the measurement data is displayed in a vector, there is a problem that the vector display and the wiring pattern cannot be distinguished.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides a display device capable of clearly and accurately grasping a physical quantity at a specific position of an object to be measured. The purpose is to do.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a captured image display area for displaying a captured image of an object to be measured, and a physical quantity of the object to be measured at each position of the image to be measured. A measurement map display area for displaying the measurement data of the measurement image as a measurement map corresponding to the captured image, and a display unit for independently arranging the captured image display area and the measurement map display area. .

In this case, since the captured image display area and the measurement map display area do not overlap each other, the physical quantity with respect to the specific position of the captured image is clear regardless of the display form of the measurement map in the measurement map display area. Can be accurately grasped.

[0008] By displaying pointers at the corresponding positions of the captured image display area and the measurement map display area, it is possible to more reliably grasp a specific location.

Further, a specific range is designated for the displayed captured image and the measurement map, and the specific range is enlarged and displayed, thereby enabling more detailed examination.

[0010] As a method of displaying the measurement data in the measurement map display area, a display by color corresponding to the measurement data or a line segment display composed of a direction and an intensity corresponding to the measurement data can be used.

By displaying the distribution of the magnetic field strength on the circuit board or the like in the measurement map display area, it is possible to easily examine measures for the electromagnetic shield using the display. In addition, by converting the measurement data relating to the magnetic field strength into current prediction data and displaying it, the current path can be grasped.

The display range of the measurement data displayed in the measurement map display area can be arbitrarily set, so that the display according to the range of the measurement data can be performed. Distribution state and the like can be grasped.

[0013]

FIG. 1 shows a display device 1 of the present embodiment.
0 shows a schematic configuration. The display device 10 is a device that displays the intensity distribution of a magnetic field including electromagnetic noise generated from the circuit board 12 as the device under test illustrated in FIG. 2, and includes a measurement unit 14 that measures the magnetic field intensity of the circuit board 12, Frequency analysis unit (spectrum analyzer) 16 for obtaining the effective value of the obtained magnetic field strength as measurement data for each frequency, an imaging unit 18 for capturing an image of the circuit board 12, a measurement map and a circuit for a magnetic field strength distribution of a specific frequency. Substrate 12
And an image processing unit 20 for displaying the captured image.

Here, as shown in FIG. 2, the measurement unit 14 has a magnetic field strength detection sensor 22 which is long in the main scanning direction (the direction of arrow X). The magnetic field strength detection sensor 22 is housed in a housing 24, and the circuit board 1
2 is provided with a contact glass 26 on which is placed. The magnetic field strength detection sensor 22 has a guide bar 28a at both ends,
28b, and is configured to be displaceable in the sub-scanning direction (the direction of the arrow Y) via the ball screw 32 under the driving action of the motor 30. As the magnetic field intensity detection sensor 22, for example, an electromagnetic noise sensor disclosed in Japanese Patent Application Laid-Open No. 10-115645 can be used.

The imaging unit 18 is a so-called scanner, and the magnetic field intensity detection sensor 22 of the measurement unit 14
It can be configured as a replacement for a CD sensor or the like.

FIG. 3 shows a circuit block of the image processing unit 20. The image processing unit 20 includes a control unit 34 that performs overall control, a magnetic field intensity map data memory 36 that stores magnetic field intensity map data of the circuit board 12 measured by the measurement unit 14, and a circuit imaged by the imaging unit 18. The computer includes a captured image data memory 38 that stores captured image data of the substrate 12, a drawing processing unit 40, and an input processing unit 42, and can be configured by a computer having an image processing function. A display 44 (display unit) is connected to the drawing processing unit 40, and an input processing unit 42
Is connected to a mouse 46 and a keyboard 48.

The image processing unit 20 includes, as image processing functions, an enlargement processing section 50 (enlarged display means), an auxiliary pointer generation section 52 (auxiliary pointer generation and display means), an auxiliary pointer display position calculation section 54, and a current prediction map data calculation. Part 5
6 (data conversion display means) and display data calculation unit 58
(Display range setting means).

The enlargement processing section 50 performs enlargement processing of an image displayed on the display 44. Auxiliary pointer generation unit 52
Performs a process of generating an auxiliary pointer displayed on a captured image in addition to a pointer displayed on the measurement map displayed on the display 44. The auxiliary pointer display position calculation unit 54 calculates a display position of the auxiliary pointer corresponding to the pointer. The current prediction map data calculation unit 56 performs a process of calculating current prediction data from the magnetic field intensity data stored in the magnetic field intensity map data memory 36. The display data calculation unit 58 is connected to the display 44.
Is performed in accordance with the designated range.

The display device 10 of the present embodiment is basically configured as described above. Next, the operation of the display device 10 will be described with reference to the flowcharts shown in FIGS.

First, the magnetic field intensity distribution on the back side of the circuit board 12 (the side on which no electronic components are mounted) is measured.

In this case, the corner of the circuit board 12 is set on the contact glass 26 of the measuring unit 14 shown in FIG. Next, the motor 30 is driven to move the magnetic field strength detection sensor 22 in the sub-scanning direction (arrow Y direction) and scan in the main scanning direction (arrow X direction), thereby making The magnetic field strength is measured at predetermined intervals (step S2).

The measurement data relating to the measured magnetic field strength is:
The transmitted value is transmitted to the frequency analysis unit 16 and the frequency analysis is performed, whereby the effective value of the magnetic field strength for each frequency is obtained (step S3).

Next, the image processing unit 20 fetches measurement data relating to the magnetic field intensity from the frequency analysis unit 16 and creates magnetic field intensity map data (step S).
4). That is, in the image processing unit 20, for example,
Using the keyboard 48, a specific frequency to be inspected is designated. The control unit 34 fetches magnetic field intensity data relating to the specified specific frequency from the frequency analysis unit 16 and creates magnetic field intensity map data including magnetic field intensity data corresponding to each position on the circuit board 12. The created magnetic field strength map data is stored in the magnetic field strength map data memory 36 (step S5).

After the creation of the magnetic field strength map data is completed, the operator performs the work of displaying the magnetic field strength map according to the screen (see FIG. 6) displayed on the display 44 of the image processing unit 20.

When the file read button 60 on the display 44 is turned on (step S6), the control unit 3
4 reads the magnetic field strength map data from the magnetic field strength map data memory 36 (step S7). When the “magnetic field” mode is selected by the display mode button 62 (step S8), the drawing processing unit 40 performs the first measurement map display area 64 of the display 44 according to the display range set by the display range setting unit 68. In the second measurement map display area 66, the same magnetic field strength map 70 (see FIG. 7) corresponding to the entire area of the circuit board 12 is divided into meshes and displayed (step S9).

That is, when the "automatic" mode is selected in the display range setting section 68, the display data calculating section 58 converts the magnetic field strength map data read from the magnetic field strength map data memory 36 according to the magnetic field strength. 7
Corresponds to the stage color. Also, the drawing processing unit 40
8, the first measurement map display area 64 and the second measurement map display area 66 are divided into a plurality of meshes 72, and each of the meshes 72 corresponds to a corresponding color of the magnetic field intensity map data (FIG. 8). In this case, a line segment 74 indicating the direction and magnitude of the magnetic field strength is displayed on each mesh 72 in addition to the display of the hatching type). 8 is the same as FIG.
7 shows an enlarged magnetic field intensity map 71 obtained by enlarging a drawing range 88 surrounded by a dotted line of the magnetic field intensity map 70 of FIG.

On the other hand, when the "current prediction" mode of the display mode button 62 is selected in step S8,
The display data calculation unit 58 calculates current prediction data from the magnetic field intensity data read from the magnetic field intensity map data memory 36 (Step S10). The drawing processing unit 40 displays each mesh 72 in a color corresponding to the magnetic field strength data, as shown in the enlarged current prediction map 75 in FIG.
At the center of each mesh 72, the direction and size of the current prediction data are displayed by the direction and length of the line segment 77 (step S11).

The magnetic field intensity map data measured by the measurement unit 14 is displayed as data on the back side of the circuit board 12 with reference to the origin org shown in FIG. Substrate 12
Depending on the imaging plane, there may be a case where the display should be reversed left and right in order to clarify the correspondence. In this case, when the operator turns on the horizontal inversion button 76 of the display 44 (step S12), the drawing processing unit 40 displays the left and right of the magnetic field intensity map 70 on the first measurement map display area 64 and the second measurement map display area 66. Is displayed in reverse (step S13).

Further, the operator sets data relating to the display interval and the display range in the display range setting section 68 (steps S14 and S15), and thereafter, a screen update button 78.
Is turned on (step S16), a magnetic field intensity map 70 having a desired display range can be displayed in the first measurement map display area 64 and the second measurement map display area 66 (step S17).

Next, the circuit board 12 is set in the imaging unit 18 (step S18), and the scan button 80 is turned on (step S19). The control unit 34 drives the imaging unit 18 to capture an image on the back side of the circuit board 12 (Step S20). The image captured by the imaging unit 18 on the circuit board 12 is the same as the measurement unit 1 shown in FIG.
4 is replaced by a CCD.
It can be obtained in a similar manner by using a line sensor or the like.

The captured image data of the circuit board 12 captured by the image capturing unit 18 is temporarily stored in the captured image data memory 38 (step S21), and thereafter, the first captured image display area 82 of the display 44 by the drawing processing unit 40. The same captured image 86 (see FIG. 10) corresponding to the entire area of the circuit board 12 is displayed in the second captured image display area 84 (Step S22).

As described above, the magnetic field intensity map 70 is displayed in the first measurement map display area 64 and the second measurement map display area 66, and the first captured image display area 82 and the second captured image display area 84 After the captured image 86 is displayed on the first measurement map display area 64,
, The drawing range 88 to be enlarged and displayed is designated by operating the mouse 46 (step S23). Instead of specifying the drawing range 88 on the first measurement map display area 64, the drawing range may be specified on the first captured image display area 82.

When the zoom-in button 92 is turned on after designating the drawing range 88 (step S24), the enlargement processing section 50 enlarges the image in the drawing range 88, and the drawing processing section 40 performs the first measurement on the display 44. Map display area 6
The enlarged magnetic field strength map 71 (FIG. 8) and the enlarged captured image 94 (FIG. 11) are drawn in the fourth and first captured image display areas 82 (step S25). Further, in the second measurement map display area 66 and the second captured image display area 84, drawing ranges 89 and 90 indicated by dotted lines are displayed in ranges corresponding to the enlarged magnetic field strength map 71 and the enlarged captured image 94.

When the operator turns on the zoom-out button 96 from the above state (step S26), the enlargement processing section 50 causes the enlarged magnetic field intensity map 71 and the first magnetic field intensity map 71 displayed in the first measurement map display area 64 to be displayed. The enlarged captured image 94 displayed in the captured image display area 82 is drawn back to the magnetic field intensity map 70 (FIG. 7) and the captured image 86 (FIG. 10), which are images before magnification (step S27).

After an enlarged image of a desired range is displayed in the first measurement map display area 64 and the first captured image display area 82, the pointer ON button 100 is turned on (step S28). Next, the operator operates the mouse 46 to set the pointer 98 to a desired point on the first measurement map display area 64. At this time, the auxiliary pointer display position calculation unit 54 calculates the position data of the auxiliary pointer 102 displayed on the first captured image display area 82 from the position data of the pointer 98 displayed on the first measurement map display area 64. I do. Next, the auxiliary pointer generation unit 52 generates the auxiliary pointer 102, and based on the position data calculated by the auxiliary pointer display position calculation unit 54, the drawing processing unit 40.
Through the first captured image display area 82 of the display 44
The auxiliary pointer 102 is displayed above (step S2
9). Note that the normally displayed pointer 98 is displayed on the first captured image display area 82, and the auxiliary pointer 102 is displayed on the first
You may make it display on the measurement map display area 64.

On the other hand, when the operator presses the pointer off button 104
Is turned on (step S30), the auxiliary pointer 10
2 is erased (step S31).

The operator operates the measurement map (for example, FIG. 8) displayed in the first measurement map display area 64 as described above.
A magnetic field including electromagnetic noise at a desired position is compared by comparing an enlarged magnetic field intensity map 71 shown in FIG. 7) with a captured image (for example, an enlarged captured image 94 shown in FIG. 11) displayed in the first captured image display area 82. The strength can be checked. in this case,
First measurement map display area 64 and first captured image display area 8
2 is displayed independently instead of being superimposed, so that there is no problem that a part of the captured image is hidden by the measurement map or becomes difficult to see as in the related art.

A pointer 98 displayed on the first measurement map display area 64 or the first captured image display area 82
The auxiliary pointer 102 is displayed at the position of the first captured image display area 82 or the first measurement map display area 64 corresponding to, so that the worker can accurately compare the measurement data with the corresponding position.

Further, as shown in FIG. 9, a line segment 7 indicating current prediction data is placed on a mesh 72 indicating magnetic field intensity data.
By superimposing and displaying 7, it is possible to grasp the electromagnetic noise and at the same time to grasp the current path.

In the embodiment described above, the circuit board 1
2, the case where the captured image 86 (FIG. 10) on the back side of the circuit board 12 is displayed and the magnetic field intensity map or the current prediction map on the back side of the circuit board 12 is displayed has been described.
The circuit board 12 is displayed on the display screen of the display 44 shown in FIG.
May be displayed together. In this case, it is possible to more clearly understand the relationship between the electronic components mounted on the circuit board 12 and the magnetic field strength.

Further, the present invention is not limited to the case where the distribution of the magnetic field or the predicted current is displayed, but also the case where the distribution of the electromagnetic wave is measured and displayed. Needless to say, the present invention can also be applied to the case of inspecting the distribution of various physical quantities, such as when displaying and comparing.

[0042]

As described above, according to the present invention, the relationship between the captured image of the object to be measured and the physical quantity measurement map at the position corresponding to the captured image can be displayed independently. For example, there is no problem that a part of a captured image is difficult to visually recognize due to the display form of the physical quantity, and the comparison can be performed in an extremely favorable state.

Since the correspondence between the captured image and the measurement map is clarified by displaying the auxiliary pointer, an accurate comparison can be made.

Further, for example, since the magnetic field strength and the predicted current can be arbitrarily switched and displayed as a measurement map, the magnetic field strength can be grasped and the current path in the object can be grasped. .

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a display device of the present embodiment.

FIG. 2 is a perspective view of a partial cross-sectional configuration of a measurement unit in the display device of the embodiment.

FIG. 3 is a circuit block diagram of an image processing unit in the display device of the embodiment.

FIG. 4 is a flowchart of an operation process of the display device of the embodiment.

FIG. 5 is an operation processing flowchart of the display device of the embodiment.

FIG. 6 is an explanatory diagram of a display screen of a display in the display device of the present embodiment.

FIG. 7 is an explanatory diagram of a magnetic field intensity map of the device displayed on the display screen shown in FIG. 6;

8 is a partially enlarged view of the magnetic field strength map shown in FIG.

FIG. 9 is a partially enlarged view of a current prediction map.

FIG. 10 is an explanatory diagram of a captured image of an object to be measured displayed on the display screen shown in FIG. 6;

11 is a partially enlarged view of the captured image shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Display apparatus 12 ... Circuit board 14 ... Measurement unit 16 ... Frequency analysis unit 18 ... Imaging unit 20 ... Image processing unit 22 ... Magnetic field strength detection sensor 34 ... Control unit 36 ... Magnetic field strength map data memory 38 ... Captured image data memory 40 ... Drawing processing unit 44 ... Display 50 ... Enlargement processing unit 52 ... Auxiliary pointer generation unit 54 ... Auxiliary pointer display position calculation unit 56 ... Current prediction map data calculation unit 58 ... Display data calculation unit 64 ... First measurement map display area 66 ... Second measurement map display area 68 Display range setting unit 70 Magnetic field intensity map 71 Magnified magnetic field intensity map 75 Magnified current prediction map 82 First captured image display area 84 Second captured image display area

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsugaki Atsushi 48, Minami-Tamuki-cho, Wakabayashi-ku, Sendai City, Miyagi Prefecture Inside Ryowa Electronics Co., Ltd. Washi Electronics Co., Ltd.

Claims (8)

[Claims] An image display area for displaying a captured image of an object to be measured and a measurement for displaying measurement data of physical quantities of the object at each position of the image as a measurement map corresponding to the image. A display device comprising: a map display area; and a display unit that independently arranges the captured image display area and the measurement map display area. 2. The apparatus according to claim 1, wherein a pointer pointing to a specific position in one of the captured image display area and the measurement map display area specifies the other area corresponding to the specific position. A display device comprising auxiliary pointer generation and display means for generating and displaying an auxiliary pointer indicating a position. 3. The display device according to claim 1, further comprising an enlarged display unit that enlarges and displays a specific range of the captured image display area and the measurement map display area. 4. The display device according to claim 1, wherein the display unit performs color display corresponding to the physical quantity measurement data on the measurement map display area. 5. The apparatus according to claim 1, wherein the display unit displays a line segment having a direction and an intensity corresponding to the measurement data of the physical quantity on the measurement map display area. Display device. 6. The display device according to claim 1, wherein the measurement data is a magnetic field strength of the device under test. 7. The display device according to claim 6, further comprising data conversion display means for converting the measurement data relating to the magnetic field strength into current prediction data for display. 8. The display device according to claim 1, further comprising display range setting means for setting a display range of the measurement map.