JP2009109283A - Waveform display device - Google Patents

Abstract

An object of the present invention is to provide a waveform display device with excellent operability that can shorten the operation time of a user.
In a waveform display device for displaying a measured waveform in a designated display mode, operation prediction execution means for predicting and executing a next operation based on an operation frequency in each display mode is provided. .
[Selection] Figure 1

Description

  The present invention relates to a waveform display device, and more particularly to improvement in operability such as a cursor and an enlarged region designation frame.

  In a waveform display device such as an oscilloscope, various parameters of a waveform are measured by moving a cursor to a measurement portion of a measurement waveform displayed on a display screen.

  Patent Document 1 describes a method of measuring a waveform on a display screen using a cursor.

JP-A 63-70851

  FIG. 5 is a configuration diagram showing an example of a cursor operation mechanism in a front panel portion of a conventional waveform display device. When the user presses the cursor key 1 to turn on the cursor mode, as shown in FIG. 6A, the cursor is in the waveform display area A of the display screen (T1 and T2 in the vertical direction in this embodiment). Is displayed at the previously set position, the cursor mode screen is displayed in the soft key area B, and the information of the selected cursor is displayed in the set value display area C.

In measurement, the user performs the following operations, and moves the cursors T1 and T2 to the positions to be measured as shown in FIG.
1) Select the cursor to move 2) Adjust the number of digits to move with the arrow keys 3) Move the cursor with the rotary knob

  First, when selecting a cursor to be moved, the cursor selection key B1 provided in the soft key area B is operated to designate a desired cursor T1 or T2. In the cursor selection key B1, the current position of each of the cursors T1 and T2 is displayed in the value of the scale unit div, and the rotary knob mark of the selected cursor T1 or T2 is highlighted, and the selected cursor T1 or Of the value of the current position of T2, the digit set as the change target is highlighted.

  FIG. 6A shows a state in which the cursor T1 is selected. The setting value display area C displays that the cursor T1 is selected, and the value “−4.00” of the current position of the cursor T1 is displayed. “Decimal point first digit: 0” set as a change target is highlighted. FIG. 6B shows a state in which the cursor T2 is selected. The setting value display area C indicates that the cursor T2 is selected, and the value “−0.53” of the current position of the cursor T2 is displayed. “Second decimal point: 3” set as a change target is highlighted.

  Next, the arrow key 2 on the front panel unit is operated to select and highlight the digit to be changed with respect to the value of the current position of the cursor T1 or T2 that is selected and displayed. Thereby, the moving resolution of the cursor T1 or T2 is set.

  After setting the moving resolution of the cursor T1 or T2, the rotary knob 3 on the front panel is operated to move the cursor T1 or T2 selected and displayed to a desired position in a desired direction with the set resolution.

  However, according to such a conventional configuration, when moving the cursor to a desired measurement position of the waveform on the display screen, when the movement distance of the cursor is long, the rotary knob 3 is turned many times or the arrow key is moved. The number of digits selection by 2 must be performed a plurality of times, and it takes time to operate these cursors, which may be a cause of deteriorating measurement work efficiency.

  Such an inconvenience also occurs when zoom display is performed by specifying a part of a measurement waveform based on a large amount of measurement data by moving the enlargement area specification frame.

  The present invention solves such problems, and an object of the present invention is to realize a waveform display device with excellent operability that can shorten the operation time of the user.

  In order to achieve such a problem, the invention according to claim 1 of the present invention is a waveform display device that displays a measured waveform in a designated display mode, and performs the following operation based on the operation frequency in each display mode. Operation prediction execution means for predicting and executing is provided.

  According to a second aspect of the present invention, in the waveform display device according to the first aspect, the display mode is a cursor mode for displaying a cursor on a display screen.

  According to a third aspect of the present invention, in the waveform display device according to the first aspect, the display mode is a zoom mode in which the waveform portion designated by the enlarged region designation frame is enlarged and displayed on the display screen at the designated magnification. It is characterized by being.

  According to a fourth aspect of the present invention, in the waveform display device according to the first aspect, a prediction execution key is provided on the display screen.

  According to a fifth aspect of the present invention, in the waveform display device according to the first aspect, a prediction execution key is provided on the operation panel.

  According to the present invention, an operation with high operation frequency is predicted and executed by operating the prediction execution key, so that it is possible to realize a waveform display device with excellent operability that can shorten the operation time of the user.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, the measurement signal input from the input terminal 4 to the input unit 5 is adjusted to an appropriate value that can be stably converted into a digital signal by the A / D converter 6 using an attenuator or an amplifier constituting the input unit 5. The signal is input to the A / D converter 6 and converted into a digital signal.

  The measurement signal input to the input terminal 4 is also input to the trigger generation unit 7 via the input unit 5. The trigger generation unit 7 exchanges signals with the front control unit 8, and generates a trigger signal when the input signal satisfies a preset trigger condition.

  The front control unit 8 includes an input control unit 8a, a sequence control unit 8b, and the like, and outputs a predetermined control signal to each unit related to the front unit of the waveform display device. For example, a control signal for setting the attenuation amount and gain to an appropriate value that can be stably converted into a digital signal by the A / D converter 6 is output to the input unit 5, and a sampling clock is supplied to the A / D converter 6. The trigger condition setting signal is output to the trigger generation unit 7, and the operation timing signal is output to the data acquisition control unit 9.

  The data acquisition control unit 9 includes a memory control unit 9a, a transfer control unit 9b, a time measurement unit 9c, a phase measurement unit 9d, an arithmetic processing unit 9e, a cursor generation unit 9f, a zoom processing unit 9g, and the like. In addition to exchanging various signals with the operation prediction unit 11, information to be displayed is output to the display control unit 12.

  That is, the memory control unit 9 a controls reading and writing of measurement data with the data memory 10. The transfer control unit 9b controls transmission / reception of data necessary for cursor operation prediction and operation predicted cursor position data to / from the operation prediction unit 11, and outputs information to be displayed to the display control unit 12. Control the transfer.

  The time measuring unit 9c measures time parameters of a target portion such as an edge of a display waveform and a pulse width. The phase measuring unit 9d measures, for example, phase parameters between the trigger signal and the target portion of the display waveform. The arithmetic processing unit 9e performs various data conversion, average value calculation, arithmetic processing between waveform data of a plurality of channels, and the like. These calculation results are also stored in the data memory 10 as necessary. The cursor generation unit 9f generates a cursor to be displayed based on the cursor position data obtained by the operation prediction unit 11. The zoom processing unit 9g generates an enlarged waveform to be displayed based on the position data of the enlarged region designation frame obtained by the operation prediction unit 11.

  The operation prediction unit 11 searches the measurement data stored in the data memory 10 through the data acquisition control unit 9 based on, for example, a trigger signal generated and output by the trigger generation unit 7. In the case of the cursor mode, the position information of the measurement data frequently operated in general waveform measurement such as the rising edge and the falling edge of the measurement waveform is obtained as the position data of the cursor and input to the cursor generation unit 9f. In the zoom mode, position information that is frequently used for zoom display in general waveform measurement such as the head part of the entire waveform is obtained as position data of the enlarged area designation frame and input to the zoom processing unit 9g.

  The display control unit 12 temporarily stores the data to be displayed output from the data capture control unit 9 in the display memory 13 and outputs the data to the display unit 14 for display.

  FIG. 2 is a view showing an example of a display screen in the cursor mode of the waveform display device according to the present invention, and the same reference numerals are given to portions common to FIG. In FIG. 2, a prediction execution key B <b> 2 is provided in one stroke of the soft key area B.

  As shown in FIG. 2A, in the waveform display area A of the display screen, cursors (T1 and T2 in the vertical direction in this embodiment) are displayed at previously set positions, and in the soft key area B, A cursor mode screen is displayed, and information on the selected cursor is displayed in the set value display area C.

In measurement, the user performs the following operations, and moves the cursors T1 and T2 to the positions to be measured as shown in FIG.
1) Select the cursor to be moved 2) Operate the prediction execution key B2

  First, when selecting a cursor to be moved, the cursor selection key B1 provided in the soft key area B is operated to designate a desired cursor T1 or T2. In the cursor selection key B1, the current position of each of the cursors T1 and T2 is displayed in the value of the scale unit div, and the rotary knob mark of the selected cursor T1 or T2 is highlighted, and the selected cursor T1 or Of the value of the current position of T2, the digit set as the change target is highlighted.

  FIG. 2A shows a state in which the cursor T1 is selected. The setting value display area C indicates that the cursor T1 is selected, and the value “−4.00” of the current position of the cursor T1 is displayed. “Decimal point first digit: 0” set as a change target is highlighted. FIG. 2B shows a state in which the cursor T2 is selected. In the set value display area C, it is displayed that the cursor T2 is selected, and the value “−0.53” of the current position of the cursor T2 is displayed. “Second decimal point: 3” set as a change target is highlighted.

  Next, the prediction execution key B2 provided in the soft key area B is operated. As a result, as shown in FIG. 2B, the cursor generated by the cursor generation unit 9f based on the cursor position data obtained by the operation prediction unit 11 is displayed as the cursor T1 or T2. That is, the cursor T1 is displayed in a state moved to the rising edge of the waveform W1, and the cursor T2 is displayed in a state moved to the rising edge of the waveform W2.

  In order to further change the position of the cursor T1 or T2 from the state of FIG. 2B, after setting the moving resolution as in the prior art, the rotary knob 3 on the front panel is operated to select and display the position. The cursor T1 or T2 is moved to a desired position in a desired direction with a set resolution.

With this configuration, when the user moves the cursor, even if the moving distance of the cursor is long, it is only necessary to select the desired cursor and operate the prediction execution key B2. Time can be greatly reduced.
Further, since it is not necessary to add parts, the cost is not increased.

  FIG. 3 is a block diagram showing another embodiment of the present invention, in which a jog shuttle 15 provided on the front panel portion of the waveform display device is used in place of the prediction execution key B2 in the soft key area B of FIG. Is shown. The jog shuttle 15 changes its amount of change according to its angle by turning the shuttle ring. When the shuttle ring is turned to the maximum, the cursor jumps to the predicted position of the cursor obtained by the operation prediction unit 11. Set to

  Thereby, the same effect as the operation of the prediction execution key B2 in FIG. 2 can be obtained.

  FIG. 4 is also an example of a display screen showing another embodiment of the present invention, and the same reference numerals are given to portions common to FIG. When the user turns on the zoom mode for enlarging the time axis by pressing the zoom key on the front panel section of the waveform display device (not shown), the upper area of the waveform display area A on the display screen is displayed as shown in FIG. The entire waveform WW and the enlarged region designation frame ZF are displayed at the previously set position, and the enlarged waveform ZW at the previously set magnification rate of the portion designated by the enlarged region designation frame ZF is displayed in the lower region. In the example of FIG. 4A, since the part designated by the enlarged area designation frame ZF is only the base part, the base part with the time axis enlarged is displayed in the lower area. In the soft key area B, a zoom mode screen is displayed, and in the set value display area C, position information on the time axis of the enlarged area designation frame ZF is displayed.

  In enlarging and displaying a part of the entire waveform WW in FIG. 4A, the user operates (turns to the maximum) a prediction execution key (not shown) (for example, the shuttle ring of the jog shuttle in FIG. 3).

  As a result, the enlarged region designation frame ZF jumps to the prediction destination obtained by the operation prediction unit 11 and performs zoom display under the previously set conditions. Therefore, the user changes to a desired zoom display condition according to the measurement target. As a result, as shown in FIG. 4B, the enlarged region designation frame ZF is displayed at the predicted position by moving to the top portion of the entire waveform WW displayed in the upper region of the waveform display region A on the display screen, In the lower area, the enlarged waveform ZW of the portion designated by the enlarged area designation frame ZF is displayed.

  With this configuration, when the user moves the enlarged area designation frame ZF, even if the movement distance of the enlarged area designation frame ZF is long, it is only necessary to operate the prediction execution key. Time can be greatly reduced.

  In addition, by providing a function block for learning the operation frequency for each display mode for each user in the data acquisition control unit 9 and reflecting those learning results in the operation prediction, the compatibility with the user's usage can be further increased. A high waveform display device can be provided.

  As described above, according to the present invention, by operating the prediction execution key, the user's next operation can be predicted, and the cursor and the enlarged region designation frame can be moved to the prediction destination. An excellent waveform display device can be realized.

It is a block diagram which shows one Example of this invention. It is an example of a display screen in the cursor mode of the present invention. It is a block diagram which shows the other Example of this invention. It is an example of a display screen in the zoom display mode of the present invention. It is a block diagram which shows an example of the cursor operation mechanism in the front panel part of the conventional waveform display apparatus. It is a display screen example figure in the conventional waveform display apparatus.

Explanation of symbols

4 Input Terminal 5 Input Unit 6 A / D Converter 7 Trigger Generation Unit 8 Front Control Unit 9 Data Acquisition Control Unit 10 Data Memory 11 Operation Prediction Unit 12 Display Control Unit 13 Display Memory 14 Display Unit

Claims (5)

In the waveform display device that displays the measured waveform in the specified display mode,
A waveform display device comprising operation prediction execution means for predicting and executing a next operation based on an operation frequency in each display mode.   The waveform display apparatus according to claim 1, wherein the display mode is a cursor mode for displaying a cursor on a display screen.   2. The waveform display device according to claim 1, wherein the display mode is a zoom mode for enlarging and displaying a waveform portion designated by an enlarged region designation frame on a display screen at a designated enlargement ratio.   The waveform display apparatus according to claim 1, wherein a prediction execution key is provided on a display screen.   The waveform display apparatus according to claim 1, wherein a prediction execution key is provided on the operation panel.