JP2001004668A - Waveform observing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a waveform observing device capable of storing measured data used for average processing in a storage device, selecting an arbitrary measured data out of the measured data stored in the storage device, and conducting average processing by using the measured waveform data selected therein. SOLUTION: This waveform observing device, displaying an input signal in a waveform, is provided with a measuring part 1 measuring an input signal for generating measured waveform data, a storing part 2 storing a plurality of measured waveform data from the measuring part 1, an averaging means 3 generating the average waveform data of the two or more measured waveform data selected from those in the storing part 2, a data controlling means 31 displaying the measured waveform data stored in the storing part 2 and the average waveform data on a display part 4, and a selecting means 5 selecting the measured waveform data from those in the storing part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform observing apparatus for displaying a waveform of an input signal, and more particularly to a waveform observing apparatus capable of performing an averaging process using arbitrary measured waveform data by improving an averaging means. It concerns the device.

[0002]

2. Description of the Related Art A conventional waveform observation apparatus, for example, a digital oscilloscope is provided with an averaging means for removing a random noise component mixed in an input signal.

The averaging means performs a predetermined number of measurements of n times, and obtains average waveform data by obtaining an average value of data at each sample point of the n pieces of measured waveform data obtained here. This is to remove a random noise component mixed in the signal.

[0004] FIG.
FIG. 9 is a diagram in which average waveform data 34 is generated by performing an averaging process on measurement waveform data 31 to 33 obtained by the first measurement. When the averaging process is performed, the value does not change even if the repeated signal included in the measured waveform data is averaged, but if the random noise component is averaged,
Values approach zero. Therefore, in the conventional waveform observation device,
Average waveform data from which random noise components contained in the input signal have been removed is generated by averaging the measured waveform data of the input signal, and the input signal is analyzed using the average waveform data.

[0005]

However, in the conventional waveform observation apparatus, average processing is performed by generating average waveform data using n pieces of measured waveform data obtained by predetermined n consecutive measurements. Therefore, if abnormal measurement waveform data that is significantly different from other measurement waveform data due to a measurement error or the like is stored in the storage unit during the n times of measurement, an error occurs in the average waveform data generated including this. There is a problem that the problem may occur.

Further, in the conventional waveform observation apparatus, the measured waveform data used in the averaging process is deleted when the average waveform data is obtained, so that the measured waveform data used in the averaging process cannot be analyzed. There was a problem.

[0007] The present invention solves the above-mentioned problems. In the present invention, measurement data used for averaging processing is stored in a storage means, and arbitrary measurement data is selected from the measurement data stored in the storage means. It is an object of the present invention to provide a waveform observing device capable of performing an averaging process using the measured waveform data selected in (1).

[0008]

According to the first aspect of the present invention, there is provided a waveform observation apparatus for displaying a waveform of an input signal, wherein the input signal is measured,
A measurement unit for generating measurement waveform data, a storage unit for storing a plurality of measurement waveform data from the measurement unit, and inputting two or more selected measurement waveform data from the storage unit; Average means for generating average waveform data, data control means for displaying the measured waveform data stored in the storage unit and the average waveform data on a display unit, and selection means for selecting the measured waveform data in the storage unit, It is characterized by having.

According to such a configuration, a plurality of measured waveform data can be stored in the storage means, and arbitrary measured waveform data can be selected from the plurality of measured waveform data stored therein and averaged. Can be applied.

Further, the average waveform and the waveform of the input signal before the averaging process are performed by displaying the measured waveform data and the average waveform data on the same screen of the display unit. The waveforms of later input signals can be compared on the same screen.

[0011] Further, by selecting measurement waveform data to be displayed on the display unit from a plurality of measurement waveform data stored in the storage unit, only the measurement waveform data to be analyzed is displayed on the display unit. Can be displayed.

Further, by displaying the measured waveform data and the averaged waveform data used in the averaging process on the same screen of the display means, it is possible to determine what type of the measured waveform data was used to perform the averaging process. Easy to grasp.

By storing the averaged waveform data thus obtained in the storage section, it is possible to save the waveform after the averaging process.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a waveform observation device according to the present invention.

In FIG. 1, a measuring section 1 measures an input signal and generates digital data, that is, measured waveform data. The history memory 2 is a storage unit that stores a plurality of measurement waveform data input from the measurement value 1.

The data control means 3 reads the measured waveform data from the history memory 2 and displays the waveform on a display unit 4, for example, a CRT or LCD. The data control means 3 has an averaging means 31.

The averaging means 31 selects two or more waveform measurement data from a plurality of measurement waveform data stored in the history memory, and calculates an average value of the data at each sample point with respect to the two or more waveform measurement data. The average waveform data is generated by calculating

The selection means 5 selects the measurement waveform data of the history memory 2 to be input to the averaging means 31 with a key or the like, and also selects the measurement waveform data and the average waveform data to be displayed on the display 4.

The operation of the above-configured device will be described below.

The measuring section 1 measures an input signal and stores in the history memory 2 measured waveform data corresponding to the number of triggers.
The data control means 3 reads the measured waveform data stored from the history memory 2 and overwrites the read measured waveform data on the display means 4. Thereby, the measured waveform data of the input signal can be displayed on the display unit 4. This is the normal measurement operation in the data observation device of the present invention.

Next, when the averaging means is selected by the selecting means 5, the measured waveform data used for the averaging process is displayed on the screen of the display section 4 from the measured waveform data displayed on the display section 4 by the above operation. Is selected by using the number of the measured waveform data displayed in.

The measurement waveform data selected here is input from the history memory 2 to the averaging means 31, where the average value of the data at each sample point of each measurement waveform data is calculated, and the average waveform data is obtained. This average waveform data is the waveform of the input signal from which random noise components mixed into the input signal have been removed.

The data control means 3 simultaneously displays the obtained average waveform data on the display unit 4 together with the measured waveform data. This is the operation of the averaging means in the data observation device of the present invention.

FIG. 2 is a display example of the measured waveform data and the average waveform data displayed on the display unit 4. In the figure,
The upper area 41 is an area for displaying the measured waveform data stored in the history memory 2, and the lower area 42 is an area for displaying the average waveform data. As the measurement waveform data displayed in the area 41, it is possible to selectively display the measurement waveform data used for the averaging process, and it is also possible to display arbitrary measurement waveform data by the selection means 5.

In the above description, the method of selecting the measurement waveform data to be used for the averaging process by the selection means 5 has been described. However, when a predetermined number of measurement waveform data are stored in the history memory 2, Averaging means 31 for storing the measured waveform data stored in
May be configured to automate the averaging process by inputting to the. This is effective when only the waveform after the averaging process is required, for example, when measuring an input signal mixed with a lot of random noise.

The foregoing description has been directed to specific preferred embodiments for the purpose of describing and illustrating the invention. Therefore, the present invention is not limited to the above-described embodiments, and includes many more modifications without departing from the spirit thereof.
This includes deformation.

For example, the history memory 2 is divided into an area for storing measured waveform data and an area for storing average waveform data, and the average waveform data after the averaging process is stored in the area for storing average waveform data in the history memory 2. A waveform observation device configured so as to be capable is also within the scope of the present invention.

[0028]

As is apparent from the above description,
According to the present invention, the following effects can be obtained. According to the first aspect of the present invention, it is possible to perform an averaging process by selecting arbitrary measurement waveform data from a plurality of measurement waveform data stored in the storage unit. Therefore, it is possible to exclude the abnormal measurement waveform data from the plurality of measurement waveform data stored in the storage means, select the optimum plurality of measurement waveform data, and perform the averaging process.

According to the second aspect of the present invention, the measured waveform data and the averaged waveform data are displayed on the same screen of the display unit, so that the waveform of the input signal before the averaging process is performed and the averaging process are performed. Can be compared on the same screen.

According to the third aspect of the present invention, only the measured waveform data to be analyzed is displayed by making it possible to select the measured waveform data to be displayed on the display unit from the plurality of measured waveform data stored in the storage unit. It can be displayed on the section.

According to the fourth aspect of the present invention, the measured waveform data and the average waveform data used for the averaging process are displayed on the same screen of the display means, so that it is easy to determine which measured waveform data was used for the averaging process. Can be grasped.

According to the invention described in claim 5, it is possible to save the waveform after the averaging process.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a waveform observation device according to the present invention.

FIG. 2 is a screen display example of the waveform observation device according to the present invention.

FIG. 3 is a diagram illustrating an averaging process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measurement part 2 History memory 3 Data control means 4 Display part 5 Selection means 31 Average means

Claims (5)

[Claims] 1. A waveform observation device for displaying a waveform of an input signal, wherein: a measurement unit for measuring the input signal and generating measurement waveform data; a storage unit for storing a plurality of measurement waveform data from the measurement unit; Selecting means for selecting the measured waveform data in the storage unit and two or more selected measured waveform data in the storage unit;
Averaging means for generating average waveform data of the input measurement waveform data, and data control means for displaying the measurement waveform data and the average waveform data stored in the storage unit on a display unit, Waveform observation device. 2. The waveform observation apparatus according to claim 1, wherein said data control means is configured to display said measured waveform data and said average waveform data on the same screen of said display unit. . 3. The apparatus according to claim 1, wherein said data control means is configured to display any of said measured waveform data selected by said selection means on said display unit.
2. The waveform observation device according to 1. 4. The waveform observation apparatus according to claim 1, wherein the data control means is configured to display the measured waveform data input to the averaging means on the display unit. 5. The waveform observation device according to claim 1, wherein the storage unit is configured to store the average waveform data.