JP2910158B2 - Cursor display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cursor display device, and more particularly, to a cursor moving process.

<Conventional technology> On a type of waveform display device, a cursor is superimposed on a target position of a displayed waveform and selectively displayed, and in conjunction with the display of the cursor, time information and amplitude information at the position are selectively digitally displayed. Some are configured to cause this.

FIG. 5 is an explanatory diagram showing an example of a display screen in such a waveform display device. The measured waveform 2 is displayed in the waveform display area 1. The time axis scale value of the measured waveform 2 is displayed in the lower part of the waveform display area 1, and the measured waveform 2 is displayed on the left side.
The amplitude axis scale value of is displayed. Cursors 3 and 4 orthogonal to each other are superimposed on the measurement waveform 2 in the waveform display area 1 and are selectively turned on and off. In conjunction with the display of the cursors 3 and 4, a numerical value 5 of the position of the time axis of the measurement waveform 2 indicated by the intersection position of the cursors 3 and 4 is selectively turned on and off at a lower portion of the waveform display area 1, and the amplitude is displayed. Numerical value 6 of the axis position is selectively displayed on the left side of waveform display area 1 on / off.

By the way, the cursor in the conventional waveform display device is
It is configured to move on the waveform data stored in the memory one point at a time according to the pressing of the cursor key or at a predetermined number of points determined according to the pressing time.

<Problem to be solved by the invention> However, according to such a conventional configuration, when a large amount of waveform data is stored in the memory, the cursor moves from the start point to the end point or from the end point to the start point of the waveform data. It takes a considerable amount of time to perform the measurement, which results in a long measurement operation. This effect becomes more pronounced as the memory length of the waveform memory increases.

The present invention focuses on such a point, and an object of the present invention is to provide a cursor display device that can move a cursor to a desired position in a short time and can substantially reduce a measurement time. is there.

<Means for Solving the Problems> A cursor display device according to the present invention includes: a waveform memory that sequentially stores a series of measured waveform data; a target position memory that stores target position data of a cursor on the waveform memory; A current position memory for storing the current position data of the cursor on the waveform memory; a display unit for displaying the waveform and the cursor; a cursor display control key for controlling the cursor display operation on and off; and a plurality of keys for specifying the cursor moving direction And a target position data selection processing function for selecting cursor target position data including at least final position data from a series of waveform data stored in the waveform memory and storing the selected target position data in the target position memory. The target position data assigned to the movement direction designation key is read from the target position data memory and the current position data is read. Controller including a cursor display control process function of moving the cursor to the copied target position after copying to a memory, characterized in that it consists of a city.

<Operation> By pressing any one of the cursor movement direction designation keys, processing for moving and displaying the cursor from the current position on the waveform memory to the target position in the designated direction is executed.

Thus, the cursor is moved and displayed from the current position to the target position in the designated direction in a fixed short time irrespective of the number of stored waveform data.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. In the figure, a measurement waveform applied to an input terminal 11 is converted into waveform data by an input circuit 12. These waveform data are stored in the waveform memory 13 in a predetermined amount set according to measurement conditions as a series of waveform data. The target position memory 14 stores target position data of a cursor on the waveform memory 13. In the target position memory 14, at least end point position data of a series of waveform data stored in the waveform memory 13 is sequentially updated and stored according to the fetching of the waveform data.
Further, as needed, the position data of the maximum value and the position data of the minimum value of the waveform data stored in the waveform memory 13 are sequentially updated and stored. The current position memory 15 stores the current position data of the cursor on the waveform memory 13. The waveform and the cursor are displayed on the display unit 16. A cursor display control key 17 controls on / off of a cursor display operation on the display unit 16. The moving direction designating key 18 is for designating the moving direction of the cursor on the display unit 16. For example, a key top with an arrow in a predetermined direction is attached to the key top so that the four directions of right, left, up and down of the display screen can be individually designated. Use cursor keys.
The control unit 19 executes various data processes including a cursor display process according to the present invention according to a program stored in the program memory 20. Specifically, the waveform memory 13
A target position data selection process of selecting cursor target position data including at least end point position data from a series of waveform data stored in the target position data and storing the selected target position data in the target position memory 14,
Executes cursor display control processing for reading the target position data assigned to the operated movement direction designation key 18 from the target position data memory 14, copying it to the current position data memory 15, and then moving the cursor to the copied target position. I do.

FIG. 2 is a flowchart showing the outline of the operation flow of the waveform display device. When the measurement is started, the waveform data is taken into the waveform memory 13. Target position memory of cursor every time one waveform data is taken
The 14 end point position data are also incremented by one count. After the acquisition of a series of waveform data of a predetermined amount is completed, the waveform display on the display unit 16 is performed, and the process is repeatedly executed until an end command is input.

FIG. 3 is a flowchart showing the flow of the operation of the cursor movement processing. First, when the cursor display control key 17 is pressed, the cursor is displayed at the current position. In a state where the cursor is displayed, a state of waiting for pressing of the cursor movement direction designation key 18 is set. When any of the cursor movement direction designation keys 18 is pressed in this standby state, the pressed key is interpreted. According to the key interpretation, the processing flow includes, for example, movement to the start point position, movement to the end point position, movement to the maximum position (minimum position), and processing end
Branched to the system. Specifically, for example, when the cursor key with the left arrow is pressed at the same time as the shift key, a process of moving the cursor to the start point position is instructed. Is copied. When the cursor key with the right arrow is pressed at the same time as the shift key, a process of moving the cursor to the end position is instructed, and the waveform stored in the target position memory 14 as the end position data in the current position memory 15 The end address of the memory 13 is copied. When the cursor key with the up arrow is pressed at the same time as the shift key, the movement process of the cursor to the maximum position is instructed, and when the cursor key with the down arrow is pressed at the same time as the shift key, the cursor is moved. Movement processing to the minimum position is instructed. When moving to the maximum position or the minimum position, the maximum value or the minimum value is sequentially compared with the head data stored in the waveform memory 13 and each position data of the maximum value or the minimum value is updated and stored in the target position memory 14. I do. Then, after comparing up to the final data, the maximum position data or the minimum position data stored in the target position memory 14 is copied to the current position memory 15. Thereafter, the cursor is moved in accordance with the position data of the current position memory 15 updated in this manner, and displayed at a predetermined position in the direction designated by the cursor movement direction designation key 18 of the display waveform. In interpreting the pressed key, when a key other than the cursor key is pressed, it is interpreted that a command for ending the cursor display has been input, and the cursor display operation process is terminated.

FIG. 4 is an explanatory diagram of a waveform display example based on such a series of processing. In the figure, a waveform memory 13 stores waveform data related to a waveform X sequentially sampled. On the waveform X indicates the current cursor position,
Indicates the cursor position when moved to the start point, indicates the cursor position when moved to the end point, indicates the cursor position when moved to the maximum point, indicates the cursor position when moved to the minimum point I have. Suppose that the waveform X is divided into three in the vertical direction (A to C) and four in the horizontal direction (0 to 3).
B-1 indicates the display area when the cursor position is, B-0 indicates the display area when the cursor position is, and B-3 indicates the display area when the cursor position is. A-1 indicates a display area when the cursor position is, and C-1 indicates a display area when the cursor position is.

The relationship between the cursor position and the display area can be set arbitrarily as needed, and is not limited to FIG.

With this configuration, the cursor can be moved to a desired position by one key operation even if the waveform memory length is long, and the operation time can be greatly reduced as compared with the conventional cursor movement operation time. .

Further, in the above-described embodiment, an example is described in which a cursor key having a key-top with an arrow in a predetermined direction is used as a cursor moving direction designation key. A function for indicating a direct jump of the cursor can also be assigned to the programmable key of.

The destination of the cursor is not limited to the start point, end point, maximum and end point positions of the measured waveform data, but may be a position having a special meaning on the waveform display, such as data of a trigger point.

Further, in the above-described embodiment, the example in which the waveform is indicated by two axes of the time axis and the amplitude axis which are orthogonal to each other has been described, but both axes are indicated by the XY waveform which is the amplitude axis and the two axes of the frequency axis and the amplitude axis It can also be applied to cursor movement in FY waveforms.

<Effects of the Invention> As described in detail above, according to the present invention, it is possible to provide a cursor display device that can move a cursor to a desired position in a short time and can substantially reduce the measurement time.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing one embodiment of the present invention, FIG. 2 is a flowchart showing an outline of an operation flow of a waveform display device, FIG. 3 is a flowchart showing an operation flow of a cursor moving process, FIG. FIG. 5 is an explanatory diagram of a waveform display example based on a series of processes, and FIG. 5 is an explanatory diagram showing an example of a display screen in such a waveform display device. 11 ... input terminal, 12 ... input circuit, 13 ... waveform memory, 14
... Target position memory, 15 ... Current position memory, 16 ... Display unit, 17 ... Cursor display control key, 18 ... Cursor movement direction designation key, 19 ... Control unit, 20 ... Program memory.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-176947 (JP, A) JP-A-1-96564 (JP, A) JP-A-60-185170 (JP, A) JP-A-63-163 253263 (JP, A) Fully open sho 63-50067 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01R 13/00-13/42

Claims (1)

(57) [Claims] 1. A waveform memory for sequentially storing a series of measured waveform data, a target position memory for storing target position data of a cursor on the waveform memory, and a current position data of a cursor on the waveform memory. Current position memory, display section for displaying waveforms and cursors, cursor display control keys for controlling the cursor display operation on and off, a plurality of movement direction designation keys for designating the movement direction of the cursor, and stored in the waveform memory. A target position data selection processing function for selecting cursor target position data including at least the final position data from the series of waveform data and storing the selected target position data in the target position memory, the target position data assigned to the operated moving direction designation key, The data is read from the target position data memory, copied to the current position data memory, and then copied to the copied target position. Controller including a cursor display control process function of moving the Sol cursor display device, characterized in that configured in capital.