JP2002350195A - Waveform-measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform-measuring instrument for searching for measurement data based on event data by inputting the event data to an arbitrary position on a time axis. SOLUTION: The waveform-measuring instrument comprises a record medium for storing the digital data of input waveforms, a display section for displaying data in the record medium, and a control section for controlling the storage of the measurement data in the record medium and the display on the display section. The waveform-measuring apparatus also comprises an event data- inputting means for inputting event data into an arbitrary position on the time axis of measurement data to be stored, an event data storage means for storing the event data at the record medium corresponding to the measurement data, and a data-searching means for searching for measurement data being stored in the record medium based on the stored event data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform measuring apparatus for converting an input waveform into digital data, storing and displaying the measured data, and more particularly, searching for desired data from the stored measured data. It relates to improvement of search means.

2. Description of the Related Art In a conventional waveform measuring apparatus, there is an apparatus for searching by a trigger position at the time of measurement, a data position on a time axis or a measured value. More simply, there is a device for scrolling a displayed waveform and searching for a desired waveform.

FIG. 3 is a flowchart showing a procedure for searching by a trigger position at the time of measurement, a data position on a time axis or a measured value. A description will be given according to the processing procedure of this flowchart.

(A1) It is determined whether to search for measurement data at a trigger position. (A2) If the judgment of A1 is "Yes", the trigger position is searched and a measurement waveform starting from the measurement data at the trigger position is displayed. (A3) If the determination in A1 is “No”, it is determined whether the search is a position search on the time axis of the measured data or a position search based on the measured value. (A4) If the determination in A3 is “Yes”, the measurement data at the designated data position is searched, and the measurement waveform starting from that data is displayed. If the judgment of A3 is "No",
The process ends.

[0004]

In a conventional waveform measuring apparatus, when the measurement data stored in a storage medium is redisplayed on a display unit for analysis or the like, if the amount of the stored measurement data becomes enormous, All data cannot be redisplayed on the same screen.

For this reason, when the measurement data to be searched exists in the undisplayed portion, the trigger position or the measurement data position based on the time axis or the measured value is searched, or the display range is moved endlessly by scrolling or the like. Searching data was performed.

In this case, in searching for a trigger position, only a data position serving as a starting point for displaying a measured waveform can be searched, so that an arbitrary plurality of positions cannot be searched.

In order to search the position of the measurement data on the time axis, information such as the time and elapsed time of the search target data is stored in a medium completely independent of the waveform measuring apparatus. Work efficiency is reduced because it must be recorded.

[0008] Further, in the data search by scrolling the display, there is a problem that the time spent for the search increases as the amount of stored measurement data becomes enormous.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. A waveform measuring apparatus capable of inputting event data at an arbitrary position on a time axis and retrieving measurement data based on the event data. The purpose is to provide.

SUMMARY OF THE INVENTION The present invention is a waveform measuring apparatus having the following configuration.

(1) A storage medium for storing digital data of an input waveform, a display unit for displaying data in the storage medium, and control for controlling storage of measured data in the storage medium and display on the display unit Data input means for inputting event data at an arbitrary position on the time axis of measured data to be stored, and event data stored in the storage medium in correspondence with the measured data. A waveform measuring apparatus comprising: a storage unit; and a data search unit that searches for measurement data stored in the storage medium based on the stored event data. (2) The waveform measuring device according to (1), wherein the event data input means directly inputs event data from a man-machine interface. (3) The event data storage means secures an area for the measurement data storage unit and the event data storage unit and stores the measurement data and the corresponding event data in a storage medium (1) or (2). The waveform measuring device according to the above. (4) The waveform measurement device according to any one of (1) to (3), further including an event data display unit that displays a list of event data stored in the storage medium on the display unit when the measurement data is retrieved. . (5) The waveform measuring device according to any one of (1) to (4), further including an enlarged display unit that enlarges and displays the retrieved measurement data on the display unit.

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

The control section 1 controls the entire apparatus and controls the apparatus.
Around the RO as a part for storing the operation program
M6 and a RAM 7 for storing set values and temporary data. The key input processing unit 3 receives an operation of the device.

The input is converted into digital data by the A / D processing unit 5, and the converted data is stored in the measurement data storage unit 21 in the storage medium 2 by the control unit 1. The data in the measurement data storage unit 21 is converted into display data by the control unit 1 and displayed on the display unit 4.

Here, an operation when event data is input will be described. The event signal input from the event input unit 31 provided in the key input processing unit 3 is stored in the storage medium 2 by the event data storage unit 11 provided in the control unit 1 so as to correspond to predetermined measurement data. The storage medium 2 is provided with a measurement data storage unit 21 and an event data storage unit 22, and each data is uniquely associated and stored.

The data search means 12 provided in the control section 1 searches for predetermined measurement data using the above event data in response to a search request from the key input processing section 3. The searched measurement data is displayed on the display unit 4 by the control unit 1.

FIG. 2 is a flowchart showing a procedure in the apparatus shown in FIG. A description will be given according to the processing procedure of this flowchart. In FIG. 1, the same components as those in the previous drawings are denoted by the same reference numerals, and the description of those portions will be omitted.

(A5) It is determined whether or not the position search is based on the event data. (A6) If the determination in A5 is “Yes”, the designated event data is searched, and the measured waveform starting from the corresponding measured data is displayed. If the determination in A5 is "No", the process is terminated.

For example, when at least one value considered to be abnormal is observed as a measured value while measuring data for a long time and storing the measured data in a storage medium, the event input means of the key input processing unit is used. By inputting an event signal, the event data is input to a plurality of measurement data considered to be abnormal or an arbitrary position on the time axis in the vicinity of the data and stored together with the measurement data.

The event input means, the event data storage means for uniquely storing the measured data and the event data in the storage medium and the storage area for each measured data and the corresponding event data in the storage medium. It can be realized by providing.

After the measurement data is completely stored in the storage medium, event data is designated, the measurement data corresponding to the event data is retrieved, and displayed on the display unit as a waveform. This can be realized by providing data search means.

As described above, the speed is increased by adding the event data to the measurement data as if it were a bookmark, and searching for the measurement data to be displayed based on the bookmark.

If a list display means for displaying a list of event data is provided, retrieval can be easily performed. Further, by providing an enlarged display means for the retrieved measurement data, the data can be easily analyzed. These list display means and enlarged display means are provided in the control unit 1, for example.

[0022]

According to the present invention, the following effects can be obtained.

According to the first to third aspects of the present invention, the event data can be added to the measurement data at an arbitrary position on the time axis, and the measurement data and the event data can be uniquely associated and stored. .

Further, by searching the measurement data on the basis of the event data, high-speed search can be performed, thereby improving the working efficiency.

According to the fourth aspect of the present invention, when the event data is input to a plurality of locations, the event data can be displayed in a list on the display unit, so that the search can be easily performed.

According to the fifth aspect of the present invention, the waveform of the retrieved measurement data can be enlarged and displayed, so that the analysis of the measurement data becomes easy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a search procedure according to the present invention.

FIG. 3 is a flowchart showing a search procedure of a conventional waveform measuring apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 2 Storage medium 3 Key input processing part 4 Display part 11 Event data storage means 12 Data search means 21 Measurement data storage part 22 Event data storage part 31 Event input means

Claims (5)

[Claims] 1. A storage medium for storing digital data of an input waveform, a display unit for displaying data in the storage medium, and a control unit for controlling storage of measured data in the storage medium and display on the display unit. An event data input means for inputting event data at an arbitrary position on the time axis of the stored measurement data, and an event data storage for storing the event data in the storage medium in association with the measurement data. Means for searching for measurement data stored in the storage medium based on the stored event data. 2. The waveform measuring apparatus according to claim 1, wherein said event data input means directly inputs event data from a man-machine interface. 3. The event data storage means secures an area for a measurement data storage unit and an event data storage unit and stores the measurement data and the corresponding event data in a storage medium. The waveform measuring device according to the above. 4. The waveform measuring apparatus according to claim 1, further comprising an event data display unit for displaying a list of event data stored in a storage medium on the display unit when the measurement data is retrieved. . 5. The waveform measuring apparatus according to claim 1, further comprising an enlarged display unit for enlarging and displaying the retrieved measurement data on the display unit.