JPH05142262A - Waveform analyzer - Google Patents

Abstract

PURPOSE:To realize a analyzer which enable choosing arbitrarily a cursor movement velocity and moving cursor to a desired position and has good operation capability. CONSTITUTION:Provided are a memory 1 to store measured data, a frame information part 2 to control data number for indication on a display, a key input part 3 directing the cursor movement initiation and movement velocity, a velocity calculator 4 to calculate the cursor movement length based on the indication data number and the movement velocity, a position calculator 5 to calculate the cursor movement position based on the cursor movement length, and a cursor data production part 6 to read the measured data of the cursor position from the measured data stored in the memory 1 and produce cursor data. Also provided are measured wave shape image production part 7 to produce a measured wave shape based on the measured data stored in the memory, a cursor image production part 8 to produce a cursor image based on the cursor data and the cursor position measurement data and an indication part 9 to indicate simultaneously overlapping the cursor image on the measured waveform image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform analysis device for displaying waveform data stored in a memory on a display unit, and more particularly to improving the moving speed of a cursor.

[0002]

2. Description of the Related Art As a waveform analysis device, the measured waveform is A / D
There is a configuration in which a converter converts it into a digital signal and stores it as waveform data in a memory, and then reads the stored waveform data and displays it on a display unit. When reading the data (amplitude, time, etc.) of the display waveform with such a device, a cursor is selectively displayed on the display screen as shown in FIG. 4, and the amplitude and time at the intersection position of the display waveform and the cursor are displayed. Is displayed at a predetermined position on the screen. FIG. 4 shows an example in which the cursor is placed on the triangular waveform of channel 2, and the display luminance of the triangular waveform is higher than the display luminance of the sine waveform of channel 1. And the time at the cursor position is 11.00m
s, the amplitude is -0.224V.

Conventionally, in order to move the cursor to a desired position in such a waveform analyzer, it has been common to operate a rotary encoder or a cursor moving key. The moving speed of the cursor is always constant regardless of intermittent movement or continuous movement, or it is set to be low during intermittent movement and automatically change from low speed to high speed during continuous movement that continues for a certain time or longer. It had been.

[0004]

However, in the case of the former,
If the amount of movement is large, the time required for movement becomes long, and the rotary encoder and the cursor movement key must be operated continuously until the desired position is reached, resulting in poor operability. In the latter case, the moving speed of the cursor is high even in the vicinity of the target position, and often passes the target position.

The present invention solves such a problem, and an object thereof is that the cursor moving speed can be arbitrarily selected and the cursor can be moved to a desired position by a simple operation. It is to realize a waveform analysis device.

[0006]

In order to solve such a problem, the present invention solves the above problems by using a memory for storing measurement data, a frame information section for managing the number of display data on a display screen, and a start of cursor movement. And a key input unit for instructing a moving speed, a speed calculating unit for calculating a cursor moving amount based on the number of display data and moving speed, a position calculating unit for calculating a moving position of the cursor based on the cursor moving amount,
A cursor data creation unit that reads the measurement data at the cursor position from the measurement data stored in memory and creates cursor data, a measurement waveform screen creation unit that creates a measurement waveform screen based on the measurement data stored in memory, and a cursor It is characterized by comprising a cursor screen generation unit that generates a cursor screen based on the data and the measurement data at the cursor position, and a display unit that simultaneously displays the measured waveform screen and the cursor screen in an overlapping manner.

[0007]

In the present invention as described above, the moving speed of the cursor can be arbitrarily selected, and the moving speed reflects the number of display data on the display screen. Accordingly, the operator can move the cursor to the target position in a short time by moving the cursor at a moving speed suitable for the operation, and it is possible to reduce the fluctuation of the moving speed due to the number of display data.

[0008]

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 the figure, 1 is a memory for storing measurement data, 2 is a frame information section for managing the number of display data on a display screen, 3 is a key input section for instructing the movement start and movement speed of a cursor, 4 is the number of display data and movement A speed calculator 5 for calculating the cursor movement amount based on the speed, a position calculator 5 for calculating the cursor movement position based on the cursor movement amount, 6
Is a cursor data creation unit that reads the measurement data at the cursor position from the measurement data stored in the memory 1 and creates cursor data, and 7 is a measurement waveform screen creation that creates a measurement waveform screen based on the measurement data stored in the memory 1. Reference numeral 8 denotes a cursor screen generation unit that generates a cursor screen based on the cursor data and measurement data at the cursor position, and reference numeral 9 denotes a display unit such as a CRT that simultaneously displays the measured waveform screen and the cursor screen in an overlapping manner.

FIG. 2 is a flow chart showing the flow of the operation of FIG. When the cursor mode is set, the cursor moving speed is initialized to a preset speed (for example, the fifth speed in the case of 9 steps), and an instruction from the key input unit 3 is waited for. If the instruction from the key input unit 3 is "cursor movement", the step of calculating the cursor movement position is executed, and if it is the instruction of "cursor speed", the step of calculating cursor speed is executed. After the cursor speed calculation step is executed, the next instruction from the key input unit 3 is awaited. After performing the step of calculating the cursor movement position,
The cursor screen drawing step is entered, and the combined display step of the measured waveform screen and cursor screen is executed. After that, it waits for an instruction from the key input unit 3.

The cursor movement speed is calculated, for example, by the following equation. Number of movement data = exp [{log (A / M) / (N-1)} × (B-1)] A: Number of screen display data M: Number of position division of display screen B: Number of speed selection steps N: Speed Number of selectable steps For example, the number of data that can be displayed on the display screen is 500 to 1,000,000, and the moving speed of the cursor is the key input unit 3
If 9 steps can be selected with the numeric keys 1 to 9, the number of movement data when the key number 1 is selected becomes 1.
The number of movement data when the key number 9 is selected is 1/10 of the display data (display screen). FIG. 3 is a relationship diagram of the number of display data in the frame corresponding to the selection key number and the cursor movement amount in such a specific example.

By combining the function for changing the cursor moving speed with the automatic cursor moving function,
Even when the cursor is moving automatically, the moving speed can be changed to a value suitable for the displayed waveform, and the cursor can be moved to the target position with good operability. By displaying the cursor movement speed on the screen, the operability can be further improved.

The speed switching step is not limited to nine steps, and may be, for example, about five steps when a dedicated key is provided. Further, in the above-described embodiment, an example of calculating the cursor moving speed according to the mathematical formula has been described, but the data as shown in FIG. 3 is made into a table, and the corresponding moving speed is read using the number of display data and the selection key as parameters. You can With such a configuration, more rapid processing becomes possible.

[0013]

As described above, according to the present invention,
The cursor moving speed can be arbitrarily selected, and a waveform analyzer having excellent operability that can move the cursor to a desired position by a simple operation can be realized, which is effective for various waveform measuring devices.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow of operations in FIG.

FIG. 3 is an operation explanatory diagram of FIG. 1.

FIG. 4 is a specific example diagram of a cursor display screen.

[Explanation of symbols]

 1 Measurement Data Memory 2 Frame Information Section 3 Key Input Section 4 Cursor Speed Calculation Section 5 Cursor Position Calculation Section 6 Cursor Data Creation Section 7 Measurement Waveform Screen Generation Section 8 Cursor Screen Generation Section 9 Display Section

Claims (1)

[Claims] 1. A memory for storing measurement data, a frame information section for managing the number of display data on a display screen, a key input section for instructing the movement start and movement speed of a cursor, and a display data number and movement speed based on Speed calculation unit that calculates the cursor movement amount, a position calculation unit that calculates the cursor movement position based on the cursor movement amount, and the cursor position measurement data is read from the measurement data stored in memory to create cursor data. A cursor data creation unit, a measurement waveform screen creation unit that creates a measurement waveform screen based on the measurement data stored in memory, and a cursor screen creation unit that creates a cursor screen based on the cursor data and the measurement data at the cursor position. , A display section that displays these measurement waveform screens and cursor screens at the same time, and Waveform analyzer, characterized in that the.