JP2008197071A - Waveform measurement device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waveform measurement device improved in operability such as expansion/shrinkage of a displayed waveform. <P>SOLUTION: This improved waveform measurement device for measuring a waveform to be measured and displaying the measured waveform in a display part is provided with a pointing device, which has a plurality of buttons, and a magnification changing means for expanding/shrinking the waveform displayed according to button operation in the pointing device to display the waveform by the same magnification in both of a time axis and an amplitude axis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waveform measuring apparatus that measures a waveform to be measured and displays the measured waveform on a display unit, and particularly relates to a waveform measuring apparatus that improves operability such as enlargement or reduction of a displayed waveform. .

  The waveform measuring device is, for example, a digital oscilloscope, measures a waveform to be measured, converts it into waveform data of a digital signal, and stores it in an acquisition memory. Then, the waveform data stored in the acquisition memory is analyzed, and the analysis result and waveform data are displayed on the display screen of the display unit via the display processing unit. Such a waveform measuring apparatus is widely used in research and development, quality control, maintenance work, etc. in various fields.

  The waveform measuring apparatus can enlarge or reduce the waveform displayed on the display screen on the time axis or the amplitude axis in order to efficiently observe and analyze the measured waveform.

  FIG. 5 is a diagram showing a front surface of a conventional waveform measuring apparatus. In FIG. 5, a display screen 100 as a display unit, a time axis (horizontal axis) adjustment knob B1, and an amplitude axis (vertical axis) adjustment knob B2 are provided.

  When the user enlarges or reduces (hereinafter abbreviated as “enlargement”) the displayed waveform as a whole (both the vertical axis and the horizontal axis), for example, the user adjusts the amplitude axis adjustment knob B2 to adjust the amplitude. Enlarge the waveform on the axis at a desired magnification. Thereafter, the adjustment knob B1 for adjusting the time axis is turned to adjust the waveform on the time axis.

JP 2004-125418 A

  The setting of the vertical axis and the horizontal axis in the waveform measuring apparatus is generally 1-2-5 steps. For example, in the case of the vertical axis, 1 [mV / div] -2 [mV / div] -5 [mV / div] -10 [mV / div] -20 [mV / div].

  However, when the display waveform is enlarged as a whole, after adjusting one knob B1 (or knob B2), the other knob B2 (or knob B1) is adjusted. For this reason, two operations are required, and it is difficult to intuitively enlarge the displayed waveform to 2 times, 4 times (or 1/2 times, 1/4 times) or the like. It was.

  In addition, as described above, since the setting of the vertical axis and the horizontal axis takes discrete values, particularly when the vertical axis and the horizontal axis are enlarged at the same magnification, the current setting values of the vertical axis and the horizontal axis ( For example, in the case of 1 [mV / div] and 2 [μs / div], it is necessary for the user to calculate a set value that will be the same magnification, and it is difficult to operate intuitively. There was a problem.

  Furthermore, when the display waveform is enlarged, etc., and then the enlarged display waveform is restored to the original size, it is necessary for the user to memorize or take note of the setting values of the vertical axis and the horizontal axis, which is difficult to operate. There was a problem.

  Accordingly, an object of the present invention is to realize a waveform measuring apparatus with improved operability such as enlargement of a displayed waveform.

The invention described in claim 1
In the waveform measuring device that measures the measured waveform and displays the measured waveform on the display unit,
A pointing device having a plurality of buttons;
Magnification changing means for displaying the displayed waveform by expanding and reducing both the time axis and the amplitude axis at the same magnification by operating a button of the pointing device is provided.
The invention according to claim 2 is the invention according to claim 1,
The pointing device is a mouse having at least two buttons,
It is characterized in that it is enlarged by clicking one button and reduced by clicking the other button.
The invention according to claim 3 is the invention according to claim 2,
The enlargement ratio or the reduction ratio is changed according to a time when the button of the pointing device is pressed.
The invention according to claim 4 is the invention according to any one of claims 1 to 3,
The pointing device has a wheel and is characterized by being enlarged or reduced in the rotation direction of the wheel.
The invention according to claim 5 is the invention according to claim 4,
The enlargement ratio or the reduction ratio is changed according to the rotation speed of the wheel of the pointing device.
The invention according to claim 6 is the invention according to any one of claims 1 to 5,
Storage means for storing the history of the changed magnification,
The magnification changing means changes the magnification with reference to the history of the storage means.

The present invention has the following effects.
Based on the button operation of the pointing device, the magnification changing means enlarges or reduces both the vertical axis and horizontal axis of the waveform displayed on the display unit at the same magnification. The operability of enlarging or reducing is improved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a measurement unit 10 receives a waveform to be measured and outputs waveform data obtained by measuring the waveform to be measured. The measurement unit 10 may be provided for a plurality of channels in order to simultaneously measure a plurality of waveforms to be measured, but only one channel is shown in FIG.

  The acquisition memory 20 stores the waveform data from the measurement unit 10. The data processing unit 30 reads waveform data from the acquisition memory 20 and performs data processing, analysis, and the like.

  The display processing unit 40 includes a magnification changing unit 41 and causes the display unit 50 to display the waveform data processed by the data processing unit 30 and the analysis result. The magnification changing means 41 has the same magnification (for example, 1 ×, 2 ×, 4 ×, 8 ×..., 1/2 ×, 1/4 ×, 1 / Enlarge at 8x ...). The display unit 50 has a display screen and displays a measured waveform, an analysis result, and the like.

  The mouse 60 is connected to the waveform measuring apparatus main body wirelessly or by wire, has two buttons and a mouse wheel, and outputs right click, left click, left and right simultaneous click, wheel rotation direction, and the like to the display processing unit 40. . In this example, the number of buttons is two, but more buttons may be used.

  The memory 70 is a storage unit and is divided into a plurality of areas. The area 71 stores an operation mode of the mouse 60, and an area 72 stores a magnification setting such as enlargement of a display waveform displayed on the display unit 50. An area 73 for storing an operation history of the mouse 60 is provided and is read / written from the display processing unit 40.

  The operation mode of the mouse 60 includes a waveform operation mode and a normal mode. The waveform operation mode is a mode for enlarging the displayed waveform, and the normal mode is a mode for performing other operations (for example, selection of a function menu on the display screen).

  Further, the operation history is a history of magnifications obtained by enlarging the display waveform in the waveform operation mode. Each history may be stored about 100, although it depends on the size of the history area 73.

The operation of such an apparatus will be described. First, the operation of displaying the measured waveform on the display unit 50 will be described.
An AD converter (not shown) of the measuring unit 10 converts a waveform under measurement of an analog signal into a digital signal, and stores digital data of a predetermined length in the acquisition memory 20 as waveform data.

  Then, the data processing unit 30 reads the waveform data from the acquisition memory 20, performs data processing such as averaging processing of the waveform data, performs waveform analysis such as detection of the maximum value / minimum value, and the processed waveform data And the analysis result and the like are output to the display processing unit 40.

  Further, the display processing unit 40 displays a waveform, an analysis result, and the like on the display screen of the display unit 50 with preset values of the vertical axis and the horizontal axis.

  Next, an operation for enlarging the waveform displayed on the display screen of the display unit 50 will be described. 2 to 4 are flowcharts showing an operation for enlarging the displayed waveform. 2 shows an operation of setting for performing enlargement using the mouse 60, FIG. 3 shows an operation of enlarging the vertical axis and the horizontal axis at the same magnification using the mouse 60, and FIG. An operation (so-called undo operation) for returning the display waveform enlarged using the mouse 60 to the original size is shown.

The setting operation will be described.
A setting unit (not shown) sets the operation mode of the mouse in the mode area 71 to the waveform operation mode based on a user operation (for example, operating an operation button provided on the front surface of the waveform measuring apparatus) (S10). , S11). Then, the setting unit sets the magnification (for example, double for enlargement and 1/2 for reduction) based on the user operation (S12, S13).

An operation for enlarging the image will be described.
When the magnification changing unit 41 refers to the mouse operation mode in the mode area 71 and is in the normal mode, the mouse 60 is not enlarged at the same magnification (S20, S21). On the other hand, in the waveform operation mode, the display waveform is enlarged by clicking the mouse 60 (S20 to S22).

  When the mouse 60 is right-clicked, the magnification changing means 41 refers to the magnification for enlargement (for example, 2 times) set in the magnification setting area 72 and doubles the display waveform on both the vertical and horizontal axes. Enlarged image data is generated (S22, S23, S25)

  When the mouse 60 is left-clicked, the magnification changing means 41 refers to the reduction magnification (for example, 1/2 times) set in the magnification setting area 72, and the display waveform is 1 for both the vertical and horizontal axes. Image data reduced to 2 times is generated (S22, S24, S25)

  Then, the magnification changing means 41 writes the enlarged magnification in step S23 or the reduced magnification in step S24 in the history area 73. In this case, the magnifications that have already been written are not overwritten and are stored in the order of operation (S26, S27).

  Further, the magnification changing means 41 displays the waveform displayed on the display screen (the waveform before the magnification change) as a waveform enlarged or the like based on the image data generated in step S23 or S24 (S28).

The undo operation will be described.
When the magnification changing means 41 refers to the mouse mode in the mode area 71 and is in the normal mode, the undo operation by the mouse 60 is not performed (S30, S31). On the other hand, in the waveform operation mode, if the mouse 60 is right-clicked or left-clicked, steps S20 to S28 are performed. If it is a left-right simultaneous click, processing for returning the display waveform to the original magnification is performed (S30 to S32). .

  When the mouse 60 is clicked simultaneously on the left and right, the magnification changing means 41 deletes the latest history (magnification value) from the history stored in the history area 73, and the previous history (current display). The previous history of the waveform is set as the latest history (S34).

  Then, the magnification changing unit 41 refers to the magnification value as the recent history of the area 73, and generates display waveform image data based on the magnification (S35, S36).

  Further, the magnification changing means 41 displays a waveform enlarged at the previous magnification based on the generated image data (S37).

  Thus, since both the vertical and horizontal axes of the display waveform are enlarged at the same magnification based on the click of the mouse 60, intuitive operation is possible, and operability such as enlargement of the displayed waveform is improved. Is done.

  In addition, with a single click of the mouse 60 (right click to zoom in, left click to zoom out), both the vertical and horizontal axes can be zoomed in. The controls can be operated quickly compared to the operation of knobs B1 and B2. The operability such as the enlargement of the waveform is improved.

  Further, based on the setting value in the magnification setting area 72, the magnification changing means 41 performs enlargement or the like at the same magnification on both the vertical axis and the horizontal axis. There is no need to obtain the adjustment amount of the knobs B1 and B2. Thereby, intuitive operation can be performed and operability, such as expansion of the displayed waveform, is improved.

  Further, since the operation history of magnification such as enlargement is managed in the area 73 of the memory 70, the waveform can be displayed at the previous magnification or at the previous magnification. This eliminates the need for the user to memorize the magnification before the change, allows intuitive operation, and improves operability such as enlargement of the displayed waveform.

The present invention is not limited to this, and may be as shown below.
Although the configuration in which the areas 71 to 73 are provided in the same memory 70 is shown, the areas 71 to 73 may be provided in physically different memories.

  Although the configuration using the mouse 60 as an example of the pointing device is shown, any device may be used.

  The configuration in which the magnification changing unit 41 enlarges the waveform displayed on the display unit 50 by right-clicking or left-clicking the button of the mouse 60 has been shown. May be performed. For example, the magnification changing means 41 may enlarge the waveform in the same way as the right click when the wheel rotates upward, and reduce the waveform in the same way as the left click when the wheel rotates downward.

  Although the magnification changing means 41 has been shown to be enlarged by the set value in the magnification setting area 72 of the memory 70, the magnification is variable depending on the length of time clicked by the mouse 60, for example, the right button is pressed. The longer the time, the better the magnification. Further, the magnification may be variable depending on the rotation speed of the wheel, and the magnification may be increased as the upward rotation is faster.

  A mouse pointer display means (not shown) of the display processing unit 40 may confirm the mode of the mode area 71 and change the shape of the mouse pointer displayed on the display screen of the display unit 50 according to the mode. Thereby, mode confirmation can be performed easily.

  When the mouse 60 is clicked on the left and right simultaneously, the magnification changing means 41 deletes the latest magnification, changes the previous magnification to the latest history, and performs an undo operation to restore the waveform magnification. However, the history of all the magnifications may be stored in the history area 73, and the display of the magnification canceled immediately before may be repeatedly executed (so-called redo operation). For example, if you click 2 times, 4 times, 8 times, 3 times with respect to the initial magnification, you can return to 4 times by double-clicking right and left, and then double back again to 8 times. Good.

It is the block diagram which showed one Example of this invention. It is the flowchart which showed an example of operation | movement of the apparatus shown in FIG. 6 is a flowchart showing another example of the operation of the apparatus shown in FIG. 1. 6 is a flowchart illustrating another example of the operation of the apparatus illustrated in FIG. 1. It is the figure which showed an example of the front surface of the conventional waveform measuring apparatus.

Explanation of symbols

41 magnification changing means 50 display unit 60 mouse 73 history area

Claims (6)

In the waveform measuring device that measures the measured waveform and displays the measured waveform on the display unit,
A pointing device having a plurality of buttons;
A waveform measuring apparatus comprising: a magnification changing means for displaying the displayed waveform by enlarging and reducing both the time axis and the amplitude axis at the same magnification by operating a button of the pointing device. The pointing device is a mouse having at least two buttons,
2. The waveform measuring apparatus according to claim 1, wherein the waveform is enlarged by clicking one button and reduced by clicking the other button.   The waveform measuring apparatus according to claim 2, wherein the enlargement ratio or the reduction ratio is changed according to a time when the button of the pointing device is pressed.   The waveform measuring apparatus according to claim 1, wherein the pointing device has a wheel and expands or contracts in a rotation direction of the wheel.   The waveform measuring apparatus according to claim 4, wherein an enlargement ratio or a reduction ratio is changed according to a rotation speed of a wheel of the pointing device. Storage means for storing the history of the changed magnification,
The waveform measuring apparatus according to claim 1, wherein the magnification changing unit changes the magnification with reference to a history of the storage unit.

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