JPH07140177A - Waveform observation apparatus - Google Patents

Abstract

PURPOSE:To realize a waveform observing apparatus by which the measuring waveform can be reproduced visibly over a wider frequency range. CONSTITUTION:The waveform observation apparatus comprises a measuring section 2 for converting a measuring waveform into a digitized waveform data, a waveform memory 3 for storing waveform data outputted from the measuring section 2, a waveform reproducing section 5 for reproducing the measuring waveform visually based on the waveform data, and an operation mode selecting section 8 where a selection is made between a first operation mode for automatically reproducing the measuring waveform visually when a predetermined volume of waveform data is stored in the waveform memory 3 and sustaining the reproduced data before it is updated and a second operation mode for reproducing the measuring waveform based on the waveform data outputted from the measuring section 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, and more particularly, to improvement of reproduction and visualization of an apparatus configured to reproduce and visualize a measured waveform based on waveform data.

[0002]

2. Description of the Related Art One type of waveform observing device is configured to reproduce and visualize a measured waveform based on waveform data in which the measured waveform is digitized. Such a conventional waveform observing apparatus, for example, when the frequency of the measured waveform is high and is not suitable for real-time processing, after a predetermined amount of waveform data is stored in the waveform memory from the waveform measuring unit, the operator visualizes and reproduces the waveform. Is selected, the waveform data is read from the waveform memory and the first operation mode in which the measured waveform is reproduced and visualized on the display unit and the recording unit is selected,
When the frequency of the measured waveform is low and it takes time to sample the waveform data, the second operation mode in which the measured waveform is reproduced and visualized on the display unit or the recording unit in real time based on the waveform data converted and output from the waveform measuring unit. Was configured to choose.

[0003]

However, according to such a conventional configuration, when the first operation mode is selected,
If the sample rate for digitizing the measured waveform is slow or if the number of waveform data to be stored is large, it takes a considerable amount of time to store a predetermined amount of waveform data in the waveform memory, and the operator can play it back. Since the measurement waveform is not reproduced and visualized until the instruction of the visualization processing is issued, as a result, there is a problem that it takes a long time until the measurement waveform is reproduced and visualized.

The present invention solves such a conventional problem, and an object thereof is to realize a waveform observing device capable of reproducing and visualizing a measured waveform of a wider frequency as the whole device.

[0005]

A waveform observing device of the present invention comprises a measuring section for converting a measured waveform into digitized waveform data, a waveform memory for storing the waveform data output from the measuring section, and a waveform. A waveform reproduction unit that reproduces and visualizes the measured waveform based on the data, and when a predetermined amount of waveform data is stored in the waveform memory, automatically reproduces and visualizes the measured waveform based on the waveform data and updates the waveform. A first operation mode to be held, and an operation mode selection unit for selecting one of the second operation modes for reproducing and visualizing the measured waveform based on the waveform data output from the measuring unit. .

[0006]

When the frequency of the measured waveform is high, the first operation mode is selected, and the measured waveform is automatically reproduced and visualized based on the waveform data when a predetermined amount of waveform data is stored in the waveform memory. The reproduced visible waveform is held until it is updated. On the other hand, when the frequency of the measured waveform is low, the second operation mode is selected, and the measured waveform is reproduced and visualized in real time based on the waveform data output from the measuring unit.

As a result, the measurement waveform of a wider frequency can be reproduced and visualized in the entire apparatus.

[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, reference numeral 1 is an input terminal for a measured waveform signal, and a measuring unit 2 for converting the measured waveform into digitized waveform data.
It is connected to the. Reference numeral 3 is a waveform memory that stores the waveform data output from the measurement unit 2, and is connected to the measurement unit 2 via the data control unit 4. Reference numeral 5 is a waveform reproducing unit for reproducing and visualizing the measured waveform based on the waveform data added via the data control unit 4. Reference numeral 6 is an output unit to which the waveform reproduction output of the waveform reproduction unit 5 is added, and a display unit and a recording unit are used. A CPU 7 controls the operation of the entire apparatus.
In addition to the measuring unit 2 and the data control unit 4, an operation mode selection unit 8, a ROM 9, a RAM 10, etc. are connected to the CPU 7. The operation mode selection unit 8 automatically reproduces and visualizes the measured waveform based on the waveform data when the predetermined amount of waveform data is stored in the waveform memory 3, and holds it until it is updated. It has a function of selecting either (hereinafter referred to as memory display) or a second operation mode (hereinafter referred to as real-time display) for reproducing and visualizing the measured waveform based on the waveform data output from the measuring unit 2.

FIG. 2 is a flow chart for explaining the operation of FIG. 1, in which (A) shows a memory display operation mode and (B) shows a real-time display operation mode. When the frequency of the measured waveform is high, the memory display operation is generally selected. In the memory display operation, the waveform data converted and output from the measurement unit 2 is transferred to the waveform memory 3 via the data control unit 4.
Stored in. Then, when a predetermined amount of waveform data is stored in the waveform memory 3, the loading of the waveform data into the waveform memory 3 is completed, and the waveform data stored in the waveform memory 3 is automatically waveform-processed via the data control unit 4. It is output to the creation unit 5. The waveform creating unit 5 creates a display waveform for reproducing and visualizing the measured waveform based on the waveform data, and sends the waveform to the output unit 6 to reproduce and visualize the measured waveform. This operation is repeatedly executed until the real-time display operation is selected.

When the frequency of the measured waveform is low, the real time display operation is generally selected. In the real-time display operation, the waveform data converted and output from the measurement unit 2 is stored in the waveform memory 3 via the data control unit 4. On the other hand, the waveform data converted and output from the measuring unit 2 in parallel with the operation of storing the waveform data in the waveform memory 3 is also added to the waveform creating unit 5 via the data control unit 4 to reproduce the measured waveform in real time. A display waveform is created for visualization. Then, when the display update timing arrives, the waveform is sent to the output unit 6 and displayed, for example. This operation is repeatedly executed until the memory display operation is selected.

FIG. 3 is a transition diagram of operating states in the configuration of FIG. That is, there are three operation states in FIG. 1, namely, "memory display state", "real-time display state", and "waveform observation stop state". When an observation start command is issued in the "waveform observation stop state", the state transits to the "real time display state" and the real time display operation is performed. When the observation stop is commanded in the "real time display state", the state transits to the "waveform observation stop state", and when the memory display is selected, the state transits to the "memory display state" and the memory display operation is performed. When observation stop is commanded in "memory display state", transition to "waveform observation stop state",
When the real-time display is selected, the state transits to the "real-time display state" again and the real-time display operation is performed.

As a result, it is possible to realize a waveform observing device capable of reproducing and visualizing a measured waveform having a wide frequency band as the entire device. In the above embodiment, the operator selects and specifies two types of operation modes. However, if the time required to store the waveform data in the waveform memory is long (for example, more than 1 second), the data is being stored. Also, the real-time waveform is displayed, and when the acquisition of the waveform data into the waveform memory is completed within 1 second, for example, the device automatically displays the waveform based on the waveform data stored in the waveform memory. May be switched. In this case, for example, the sample rate of the measuring unit 2 can be used as the switching parameter.

Further, although the case where the output unit is the display unit has been described in the above embodiment, substantially the same effect can be obtained even if the output unit is the recording unit.

[0014]

As described above, according to the present invention,
It is possible to realize a waveform observation device capable of reproducing and visualizing a measurement waveform having a wide frequency band as the entire device.

[Brief description of drawings]

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

FIG. 2 is a flowchart illustrating the operation of FIG.

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

[Explanation of symbols]

 1 Input Terminal 2 Measurement Section 3 Waveform Memory 4 Data Control Section 5 Waveform Creation Section 6 Output Section 7 CPU 8 Operation Mode Selection Section 9 ROM 10 RAM

Claims (1)

[Claims] 1. A measuring unit for converting a measured waveform into digitized waveform data, a waveform memory for storing the waveform data output from the measuring unit, and a waveform reproduction for reproducing and visualizing the measured waveform based on the waveform data. A first operation mode for automatically reproducing and visualizing a measured waveform based on the waveform data when a predetermined amount of the waveform data is stored in the waveform memory and updating the waveform;
A waveform observation apparatus comprising: an operation mode selection unit that selects one of second operation modes for reproducing and visualizing a measured waveform based on waveform data output from the measurement unit.