JP3454937B2 - Measuring device and method of displaying measurement results - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a measuring device and a display method thereof, and more particularly to a measuring device for displaying measurement results at a large number of points such as an electroencephalograph and an electromyographic device and a measurement result display method thereof. .

[0002]

2. Description of the Related Art Conventionally, measuring devices have a function of displaying measurement results in real time and recording time-series measurement results.

Recently, not only the measurement results of a large number of points are displayed on a two-dimensional plane corresponding to the measurement positions, but also the data of the unmeasured positions between the measurement positions (predicted measurement results) are displayed for the physical property values to be measured. ) Can be predicted and displayed.

A display example of the EMG will be described. The user uses a coordinate input device such as a mouse to indicate the position of the electrode to be set on the human body in advance on the display screen as shown in FIG.
In the example of FIG. 1, 12 points of electrodes are used. When 12 points of electrodes are set in the EMG main unit and the EMG main unit is instructed to start the measurement, the EMG will receive the measurement results of 12 points, that is, the measured data will be interpolated when received at a certain time. Is used to calculate the physical property value of the unmeasured position using the measurement result. The data at each position and the sampling data obtained as a result of the calculation are displayed in different colors according to the value of the data.
For convenience of explanation, in the example of FIG. 2, colors are displayed in gray scale (black and white shading). Since such a process is repeatedly executed at a very early cycle, it seems that the measurement result is displayed in real time on the display screen.
By interpolating and displaying the data of the unmeasured position in this way, the measurer can grasp the distribution state of the physical property values on the entire plane of the measurement target.

[0005]

However, the conventional display device of this type of measuring device has the following limitation, so that the measuring range is also limited.

1) A virtual grid frame (also called a mesh) 200 as shown in FIG. 3 is used to interpolate data, but electrodes must be set at intersections (grid points) 201 of this grid frame.

2) The electrodes are required to be bilaterally symmetrical in order to improve the accuracy of the calculation data of the positions where the electrodes are not installed. Therefore, in FIG. 3, for example, a large number of electrodes cannot be installed on the forehead part.

Therefore, in view of the above-mentioned point, the object of the present invention is to enable accurate display of the data of the measurement object as a whole even if a sensor for detecting the physical property value such as an electrode is locally installed. An object of the present invention is to provide a display device of a measuring device and a method of displaying the measurement result.

[0009]

In order to achieve such an object, the invention of claim 1 virtually sets a grid frame having a plurality of measurement points, and positions the grid points of the grid frame. Predict the measurement data of the interpolation points between the grid points based on the measurement data of, and regard the predicted data as the measurement data,
In a measuring device displaying together with actual measurement data, an instruction means for instructing positions of the plurality of measurement points, a first information processing means for calculating a degree of dispersion of the instructed plurality of positions, and the calculated dispersion. Second information processing means for variably setting the eye gap of the lattice frame according to the degree of the above, and measurement data at the position of the lattice point of the lattice frame determined from the variably set eye gap, A third information processing means for acquiring from the actual measurement data in the central specific area, and regarding the acquired measurement data of the grid points as the actual measurement data, predicting the measurement data of the interpolation points between the grid points. Is characterized by.

According to a second aspect of the present invention, in addition to the first aspect of the invention, a display instruction means for instructing display of the variably set lattice frame, and a graphic image showing the lattice frame in response to the instruction. A first image processing means to be created and a second image processing means to combine the created graphic image with measurement data to be displayed.
And an image processing means of 1.

According to a third aspect of the present invention, a grid frame having a plurality of measurement points is virtually set, and the measurement data of the interpolation points between the grid points is obtained based on the measurement data of the positions of the grid points of the grid frame. In a measuring device that predicts and regards the predicted data as measurement data, and displays the measured data on the display screen of the display device, the positions of the plurality of measurement points are instructed to the measuring device, and the measurement is performed. The device calculates the degree of dispersion of the designated plurality of positions, variably sets the eye interval of the lattice frame according to the calculated degree of dispersion, and a grid determined from the variably set eye interval. The measurement data at the position of the grid point of the frame is acquired from the actual measurement data in the specific area centered on the relevant grid point, and the acquired measurement data of the grid point is regarded as the actual measurement data and the interpolation point between the grid points is calculated. Pre-measurement data Characterized in that it.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the measuring device stores in advance a graphic image showing the shape of the object to be measured, displays the graphic image, and displays the displayed graphic. It is characterized in that the positions of the plurality of measurement points are designated in association with the image.

According to a fifth aspect of the present invention, in addition to the third aspect of the present invention, the measuring device stores in advance a graphic image showing a shape of a measurement target, displays the graphic image, and displays the displayed graphic image. The measurement data of the grid points and the measurement data of the interpolation points are displayed in association with the image.

According to a sixth aspect of the present invention, in addition to the fifth aspect of the invention, image data showing the shape of the measurement target according to the passage of time, the measurement data of the grid points and the measurement data of the interpolation points at each time point. The display position of is changed and displayed.

The invention of claim 7 is characterized in that, in addition to the invention of claim 5, the measured data of the grid points and the measured data of the interpolation points are changed in response to a time-series change of the measured data. To do.

According to an eighth aspect of the present invention, in addition to the seventh aspect, the measuring apparatus of the fifth aspect creates a waveform image representing measured data that changes in time series as a waveform along the time axis,
The waveform image is displayed on the same screen together with the measurement data of the grid points and the measurement data of the interpolation points.

[0017]

In the inventions of claims 1 and 3, since the dispersion of the measurement points set at arbitrary positions, that is, the degree of distribution can be obtained, the fineness of the grid frame can be varied according to the degree of distribution. Is set.

According to the second aspect of the present invention, by displaying the grid frame, not only the position and distribution state of the measurement points but also the distribution state of the measurement results can be grasped.

According to the fourth aspect of the present invention, since the graphic image of the measurement target is displayed together with the measurement result, the user can easily understand the distribution state of the measurement points.

According to the invention of claim 5, the user can easily understand the distribution state of the measurement results.

According to the sixth aspect of the invention, the change in the measurement result at the same position can be known by comparing the measurement results at different time points.

According to the invention of claim 7, the measurement result is changed in time series at the same position, so that the display area is not widened.

According to the eighth aspect of the present invention, by adding and displaying the waveform display, it becomes possible to display a two-dimensional data distribution state and a data display showing changes in time series, thereby enabling multidimensional data display. Will be easier.

[0024]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 4 shows a system configuration when the present invention is applied to an electroencephalograph. In FIG. 4, reference numeral 1 denotes an electrode group which is installed on a human body to be measured and detects a potential difference, and the individual electrodes are denoted by reference numerals 1A to 1N. 2 is analog /
A digital converter (abbreviated as A / D converter), which converts a measurement result output from each electrode in the form of an analog signal into a digital signal.

Reference numeral 100 is an electroencephalograph main body, and a personal computer can be used. The electroencephalograph main body 100 has the following components.

Central processing unit (CPU) 101: executes a system program stored in a ROM 102 described later to execute system control, and also executes an uplocation program stored in a hard disk storage device (HDD) 106. The measurement results are displayed in various forms. When the user requests recording and reproduction of the measurement result, the processing is executed. As will be described later, the CPU 101
Are first to third information processing means and first and second information processing means of the present invention.
Functioning as an image processing means.

ROM 102: A well-known processing program relating to system control is executed to execute a random access memory (RAM) 103 and a video RAM (VRAM) 1 which will be described later.
04, a system program for reading / writing information to / from the HDD 106 is stored in the ROM 102.
The ROM 102 also stores a system program for receiving information input from the I / O 109, the keyboard 107, and the coordinate input device 108 such as a mouse. These system programs are generally called operation programs and are well known, and detailed description thereof will be omitted.

RAM 103: calculation result of CPU 101,
It is used for temporary storage of input data to the CPU 101.

VRAM 104: cathode ray tube display (CR
T) 105 and stores display information in dot matrix form. The display information is the CPU for the VRAM 104.
After being written by the CRT 102, the information stored in the VRAM 104 is read out by the CRT controller (not shown)
It is visually displayed on the display screen 105.

CRT 105: Displays dot information in color.

HDD 106: Stores an application executed by the CPU 101, that is, a program for recording, reproducing and displaying the measurement result. Further, a conversion table for converting a character code into a display dot pattern (font pattern) and various information used for system control are also stored in the HDD.

Keyboard 107: CP with character keys
Input operation instructions, character information, numerical information, etc. to U101.

Coordinate input device 108: In addition to moving the (mouse) cursor displayed on the CRT 105. The CPU 101 is notified of the cursor position. The coordinate input device is not limited to a mouse, but a device using a trackball or the like can be used. In this embodiment, the coordinate input means operates as the instruction means of claim 1.

Input / output interface (I / O) 109:
The measurement results of the plurality of electrodes output from the A / D converter 2 are received and delivered to the CPU 101 at a constant cycle.

In addition, a floppy disk storage device can be built in or connected to the measuring device main body 100. Also, a printing device or a communication device with the outside can be connected.

The display processing of the measurement result according to the present invention executed by the above system configuration will be described mainly with reference to FIG. FIG. 16 shows a processing procedure executed by the CPU 101 of FIG. This processing procedure constitutes a part of the measurement processing procedure and is stored in advance in the HDD 106 in the form of a programming language that can be executed by the CPU 101, but in the present embodiment, it is expressed functionally for convenience of explanation.

1) Environment setting (field editing) The user specifies the field editing mode using the keyboard 107 or the coordinate input device 108 prior to measurement. In response to this instruction, an image simulating the measurement object as shown in FIG. 5 is displayed on the display screen of the CRT 105 as in the conventional case. The specific processing of the CPU 101 is an HDD
The head image stored on 106 is read, and the image showing the electrodes is temporarily stored in the RAM 103. Then h
An image screen for display is synthesized by overlaying an image of a figure showing an electrode, that is, a square figure including a number, which is also stored on dd106, on the RAM 103 on the RAM 103. In addition, an image of a button (also called an icon) for operation instruction is added.
The display image created in this way is VRAM
It is written in 104. This image is sent to the CRT 105 and displayed as shown in FIG. The user moves the figure indicating the electrode to be set on the display screen by the coordinate input device 108 and informs the CPU 101 of the confirmed position. The CPU 101 controls the movement display of the figure according to this movement instruction and stores the position of the determined electrode figure in the RAM 103 for each number (step S1 in FIG. 10).
0 → S20).

Next, the CPU 101 performs the following calculation for determining the width of the grid frame used for data interpolation based on the set measurement position. The first feature of this embodiment is that the width of the lattice frame is not fixed as in the conventional case, but is set variably according to the dispersion state of the electrodes. For this purpose, first, for example, the region of the measurement object, in this case, the figure of the head is divided by the integer N rectangles obtained by rounding off the square root of the number of electrodes. In the example of FIG. 5, the number of electrodes is 12, and 3 is obtained as the integer N. For this reason, a 3 × 3 rectangular grid frame is initially set. Next, the size of the grid frame is changed to a square in which the length of one side of the grid frame is an integral multiple of k in consideration of performing spline interpolation by dividing the grid frame into k parts.

After that, the CPU 101 calculates the dispersion of the electrodes included in the grid frame in the following processing steps (FIG. 1).
6 step S30).

Step A: The CPU 101 obtains the number of grids in which the center of the grid is within the field (figure of the head) or the electrodes are included.

Step B: Next, the CPU 101 calculates the variance of the number of electrodes existing in the corresponding grid. The variance value is obtained by the following equation.

[0042]

[Equation 1]

Here, SD is the dispersion value and the number of electrodes is Ei.
(I = 1, n), and the average number of electrodes of each lattice is A.

Step C: When the variance value SD is obtained in this way, the division number N of the grid frame is recalculated according to the value of SD.

When SD is 0.00 to 0.50, a new value of N is obtained by adding 2 to the current value of N.

When SD is 0.50 to 1.00, a new N value is obtained by adding the numerical value 5 to the current N value.

When SD is 1.00 to 1.25, the value of 8 is added to the current value of N to obtain a new value of N.

When SD is 1.25 to 1.50, the numerical value 10 is added to the current N value to obtain a new N value.

When SD is 1.50 to 50, the new N value is obtained by adding the numerical value 12 to the current N value.

Step D: The size of the lattice frame determined by the obtained value of N is increased by one size.

When such a treatment is carried out, when the electrodes are concentrated on the forehead as shown in FIG. 7 in which the positions of the electrodes are indicated by "." Symbols, a fine grid frame is obtained. For reference, FIG. 6 illustrates a lattice frame determined when the electrodes are distributed over a relatively wide range.

This is because the more the electrodes are dispersed locally, the higher the dispersion value in the initially defined grid frame is. Therefore, the number of grids is increased according to the value and the number of electrodes included in the grid is made uniform. There is nothing but to do. In other words, when there is a local electrode concentration, the grid is made finer to reduce the number of electrodes included in one grid, thereby facilitating the interpolation of the data at the position where no electrode exists. It also means that The CPU 101 at this time functions as the first and second information processing means of claim 1.

When the intervals between the eyes of the grid frame and the size of the grid frame are thus determined, the CPU 101 stores data indicating the determined intervals and the size of the grid frame in the RAM 10 of FIG.
3 is temporarily stored and waits for an instruction to start measurement (step S40 in FIG. 16).

When the user uses the keyboard 107 or the coordinate input device 108 to instruct the start of measurement and the display of the measurement result in real time, the execution procedure of FIG. 16 shifts from step S10 to S100 to S110, and the CPU
101 reads the measurement result of the electrode group 1 from the I / O 2 of FIG. 4 and temporarily stores it in the RAM 103.

Next, the CPU 101 reads the data regarding the above-mentioned lattice frame from the RAM 103, and predicts the data value at the lattice point (see reference numeral 201 in FIG. 3) position from the measurement result. This process will be described in detail.

Specific radius r centered on a certain grid point
Assuming a circle (specific area of claims 1 and 3), the electrodes and their positions included in the circle are detected. Next, it is determined by the following formula from the measured value of the detected electrode and the weighting coefficient.

[0057]

[Equation 2]

Here, it is assumed that there are k electrodes in the circle.

However,

[0060]

[Equation 3]

In this embodiment, a spline function defined by the following equation is used as the weighting coefficient.

[0062]

[Mathematical formula-see original document] W = sin (x) / x Below, the predicted values of all grid points are calculated by the CPU as described above.
Calculated by 101. Further, the display color of the dot at the grid point position is determined according to the value. The data of the determined color, that is, the color component data is stored in the RAM 103 in association with the positions of the grid points on the display screen (FIG. 16).
Step S130).

Next, the CPU 101 sequentially calculates the predicted value of the interpolation point sandwiched between the two grid points. For this calculation method, various conventionally used interpolation methods may be used, and detailed description thereof will be omitted. Further, the color of the display dot is determined according to the value of the data obtained from the calculation, and the color data is stored in the RAM 103 (step S130 in FIG. 16). When the number of measurement value display areas on the display screen is larger than the number of interpolation points and grid points, color data of the same interpolation data is used for a plurality of pixels.

When data of all grid points and interpolation points in the measured value display area are calculated and color data is created, the CPU
Reference numeral 101 denotes a VRAM 104 that displays a graphic image (color data) of a measurement target and color data indicating the magnitude of the measurement value.
Synthesize above. As a result, the measurement result and the predicted data of the peripheral position obtained by the interpolation are displayed in the color form (see FIG. 2).

In this embodiment, the keyboard 107 or the coordinate input device 108 as the display instruction means of the invention of claim 2 is used.
When the user gives an instruction to display the grid frame using, the CPU 1
01 creates a grid frame image on the VRAM 104 using the above-mentioned grid frame size and eye interval data, and synthesizes it with the measurement data to enable display of the grid frame (step S150 in FIG. 16 → S160). C at this time
The PU 101 functions as the first and second image processing means of the invention of claim 2.

Since the above processing from the measurement result to the display is repeated in a very short fixed period, it looks as if the measurement result is displayed in real time on the display screen.

As a result, the measurement result and the grid frame are displayed on the display screen as shown in FIGS. The distance between the eyes of the grid frame not only informs the degree of dispersion of the electrodes,
It can also be used as a scale when measuring the position and size of areas with the same color. It should be noted that when the electrodes are concentrated and the distance between the electrodes is narrow, the width of the mesh of the lattice frame is also small. For this reason, the width of the interpolation point at the location where the electrodes are concentrated is also small, and therefore the high measurement accuracy at this location does not require a detailed description.

In addition to this embodiment, the following example can be carried out.

1) In the present embodiment, the location of the human body to be inspected is limited to the head, but the measurement location is when the head is viewed from above,
Various cases are conceivable, such as when the human body is viewed from the front or back, or when the head is viewed from the side. Therefore, the user can specify the actual measurement pattern by displaying a plurality of types of measurement patterns as shown in FIG. 8 by the coordinate input device. Also, the measurement points may be prepared as patterns with different points without being fixed, or the points may be indicated numerically from the keyboard 107.

2) The physical properties to be measured may be desired ones such as temperature and potential difference, but the present invention is particularly suitable for measurement in an environment where data at other positions must be predicted from measured values at a plurality of points. It is suitable.

3) In this example, the color display of the measurement result was changed with the passage of time without moving the figure to be measured on the display screen. However, when it is desired to compare the measurement results at different time points, it is possible to change the display position on the display screen at specific time intervals and display the measurement results as shown in FIGS. 9 and 10. 9 is a display example in which the grid frame is not displayed, and FIG. 10 is a display example in which the grid frame is added and the measurement result is displayed. In addition, by changing the display interval according to an instruction from the keyboard 107 or the coordinate input device 108, the number of measurement results displayed on the display screen can be set as shown in FIGS.
It can be changed as shown in.

4) Still another display form is shown in FIGS.
Shown in. In this example, the display of the measurement result in the form of color and the time series display in the form of waveform are realized on the same display screen. Further, by moving the vertical line in FIG. 13 on the waveform display to the left or right according to a user's instruction, it becomes easy to compare the measurement results at a plurality of points. Further, in the case of measurement for a long time, if the waveform display is scrolled according to the passage of time, it is not necessary to set the display screen area wide. FIG. 14 is an example in which a grid frame can be displayed in the display of FIG. 13, and no particular explanation will be required. FIG. 15 is a display example in which the position of an electrode on the display of the measurement result of the color form and the waveform measured by the electrode are connected by a straight line image so that the correspondence can be clearly understood.

5) The figures to be measured shown in FIGS. 5 to 15 may be prepared in advance, or the user may draw them on the display screen. In this case, the drawing image is HDD
It will be stored on 106. Also, the measurement area is a closed area in the drawing image, or the user specifies the area range.

6) In this embodiment, the display of the grid frame is possible only for displaying the measurement data, but if all the positions of the measurement points (electrodes) are indicated on the display screen of FIG. 5, the size of the grid frame becomes smaller. After that, the image of the lattice frame determined according to the instruction of the user can be displayed thereafter.

[0075]

As described above, according to the first and third aspects of the invention, even if the measurement points are locally arranged, the mesh size of the grid frame for interpolation calculation is fine according to the distribution state thereof. Is set variably, so the accuracy of the supplemented data also changes according to the degree of detail. Further, there is no restriction on the arrangement of the measurement points.

According to the invention of claim 2, the distribution state of the measuring points,
The distribution of measurement results becomes clearer.

According to the inventions of claims 4 to 8, not only the conventional problems are solved but also various display forms are adopted, so that a display form suitable for the user can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a conventional display content.

FIG. 2 is an explanatory diagram showing conventional display contents.

FIG. 3 is an explanatory diagram for explaining conventional display processing contents.

FIG. 4 is a block diagram showing a system configuration of an embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating display contents related to environment setting according to the embodiment of this invention.

FIG. 6 is an explanatory diagram illustrating a display process according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating a display process according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram showing another display mode of the embodiment of the present invention.

FIG. 9 is an explanatory diagram showing another display form of the embodiment of the present invention.

FIG. 10 is an explanatory diagram showing another display form of the embodiment of the present invention.

FIG. 11 is an explanatory diagram showing another display mode of the embodiment of the present invention.

FIG. 12 is an explanatory diagram showing another display form of the embodiment of the present invention.

FIG. 13 is an explanatory diagram showing another display form of the embodiment of the present invention.

FIG. 14 is an explanatory diagram showing another display form of the embodiment of the present invention.

FIG. 15 is an explanatory diagram showing another display form of the embodiment of the present invention.

16 is a flowchart showing a processing procedure executed by the CPU 101 of FIG.

[Explanation of symbols]

1 electrode group 2 A / D converter 100 Measuring device body 101 CPU 102 ROM 103 RAM 104 VRAM 105 CRT 106 HDD 107 keyboard 108 coordinate input device

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-150053 (JP, A) JP-A-62-11433 (JP, A) JP-A-1-288233 (JP, A) JP-A-5- 42119 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 5/04 A61B 5/05 A61B 5/00 A61B 10/00 Practical file (PATOLIS) Patent file (PATOLIS)

Claims (8)

(57) [Claims] 1. A grid frame having a plurality of measurement points is virtually set, the measurement data of interpolation points between the grid points is predicted based on the measurement data of the positions of the grid points of the grid frame, and the prediction is performed. In the measurement device that regards the measured data as the measurement data and displays the measured data together with the measurement data, the first means for calculating the degree of dispersion of the plurality of measurement positions and the instruction means for instructing the positions of the plurality of measurement points. An information processing means, a second information processing means for variably setting the eye interval of the grid frame according to the calculated degree of dispersion, and a grid point of the grid frame defined by the variably set eye interval. A third information processing means for acquiring measurement data at a position from measurement data in a specific area centered on the grid point, and regarding the acquired measurement data of the grid point as measurement data, Of interpolation points Measuring apparatus characterized by predicting a constant data. 2. A display instructing means for instructing to display the variably set lattice frame, a first image processing means for producing a graphic image showing the lattice frame in response to the instruction, and the created The measuring apparatus according to claim 1, further comprising second image processing means for synthesizing the graphic image with the measurement data to be displayed. 3. A grid frame having a plurality of measurement points is virtually set, the measurement data of interpolation points between the grid points is predicted based on the measurement data of the positions of the grid points of the grid frame, and the prediction is performed. The measured data is regarded as measurement data, and in a measurement device that two-dimensionally displays on the display screen of the display device together with the actual measurement data, the positions of the plurality of measurement points are instructed to the measurement device, and the measurement device Calculates the degree of dispersion at a plurality of designated positions, variably sets the eye spacing of the grid frame according to the calculated degree of dispersion, and the grid of the grid frame is determined from the variably set eye spacing. The measurement data at the position of the point is acquired from the actual measurement data in the specific area centered on the relevant grid point, the acquired measurement data of the lattice point is regarded as the actual measurement data, and the measurement data of the interpolation points between the lattice points are obtained. To predict Measurement result display method of the measuring apparatus according to claim. 4. The measuring device prestores a graphic image showing the shape of a measurement target, displays the graphic image, and indicates the positions of the plurality of measurement points in association with the displayed graphic image. 4. The method according to claim 3, wherein
The method for displaying the measurement results of the measuring device described in. 5. The measuring device stores in advance a graphic image showing the shape of a measurement target, displays the graphic image, and associates the measured data of the grid points and the interpolation points with each other in association with the displayed graphic image. The measurement result display method of the measuring device according to claim 3, wherein the measurement data is displayed. 6. The display position of the image data showing the shape of the measurement object, the measurement data of the grid points and the measurement data of the interpolation points at each time point is changed and displayed according to the passage of time. Item 6. A measurement result display method of the measuring device according to Item 5. 7. The measurement result display of the measuring device according to claim 5, wherein the measurement data of the grid point and the measurement data of the interpolation point are changed in response to a time-series change of the measurement data. Method. 8. The measuring device according to claim 5, creates a waveform image representing measured data that changes in time series by a waveform along a time axis, and uses the waveform image as the measurement data and the interpolation points at the grid points. The measurement result display method of the measuring device according to claim 7, wherein the measurement data is displayed on the same screen together with the measurement data.