JP2998297B2 - Waveform measuring device - Google Patents

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, and more particularly, to an improvement in measurement termination processing in an apparatus having a waveform data storage function.

[0002]

2. Description of the Related Art As one type of waveform measuring apparatus, there is an apparatus configured to perform a waveform display process in parallel with an operation of storing waveform data. In ending the measurement processing with such a waveform measuring apparatus, the storage of the waveform data of one-specified number of scans and the termination of the processing when the display processing is completed are completed. Forcibly terminating the data storage and display processing even if the data storage and display processing are not completed is selectively performed.

FIG. 3 is a block diagram showing an example of a conventional waveform measuring device. In the figure, reference numeral 1 denotes an input terminal for a measurement waveform, which is connected to the A / D converter 2. Output data of the A / D converter 2 is stored in the memory 3 as waveform data. The waveform data stored in the memory 3 is read out to the display unit 4 and reproduced and displayed. The operations of these units 2, 3, and 4 are controlled by the operation control unit 5. Reference numeral 6 denotes a one-scan end signal input unit, which is added to the operation control unit 5 via the one-scan end processing unit 7. Reference numeral 8 denotes a forced termination signal input unit, which is added to the operation control unit 5 via a forced termination processing unit 9.

In such a configuration, when it is desired to end the scan, an end signal is input from the one-scan end signal input unit 6. This is used, for example, when the time required to execute one scan is extremely short and it is difficult to match the time of completion of one scan by forced termination by manual operation. On the other hand, when it is desired to end the process, the end signal is input from the forced end signal input unit 8 by manual operation. This is used when the time required for the execution processing of one scan is long and it takes a considerable time from the input of the end to the actual end after the execution processing of the one scan.

[0005]

However, according to such a conventional configuration, since two systems of operation units for inputting the end signal are provided, the input of the end signal depends on the measurement conditions. It is inconvenient to use them properly, distinguishing them from each other. If the selection of the input operation unit for the end signal is incorrect, the proper measurement process may not be performed, and the measurement must be performed again.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to realize a waveform measuring apparatus which does not require selection of an end signal input operation unit.

[0007]

SUMMARY OF THE INVENTION The present invention provides an A / D converter for converting a measured waveform into a digital signal, a memory for storing output data of the A / D converter as waveform data, and a memory for storing the output data. A display unit for reading out the waveform data and reproducing and displaying the measured waveform; an end signal input unit; a one-scan end signal generating unit for generating a one-scan end signal according to an end signal applied from the end signal input unit; The state of the measurement process after the elapse of a preset standby time from the generation is monitored. If the measurement process has been completed, it is determined that one scan measurement has been completed. If the measurement has not been completed, a forced termination signal generation instruction is issued. A scan termination processing unit, a forced termination signal generation unit that generates a forced termination signal in accordance with an instruction from the one-scan termination processing unit, and a forced termination that terminates the measurement process in accordance with the forced termination signal Management unit, characterized in that it consists of a city.

[0008]

By inputting one type of end signal without considering the end of one scan and the forced end, the forced end signal becomes effective when the time required to capture and store the specified number of waveform data is long, When the time required to acquire and store the waveform data is short, the one-scan end signal becomes valid.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.
The same parts as those in FIG. 3 are denoted by the same reference numerals. In the figure, reference numeral 10 denotes an end signal input unit, the output terminal of which is 1
It is connected to the scan end signal generator 11. The one-scan end signal generation unit 11 is connected to the operation control unit 5 via the one-scan end processing unit 12, and is also connected to the forced end signal generation unit 13. Forced end signal generator 1
Reference numeral 3 is connected to the operation control unit 5 via the forced termination processing unit 14.

The operation of such a configuration will be described with reference to the flowchart of FIG. A shows the flow of the main processing,
B shows the flow of the end input process. A main process shown in FIG. 4A is a process in which waveform data for a specified number of points is fetched from the A / D converter 2 and stored in the memory 3, and the process of display and recording is repeated as one measurement process. B
The end input process shown in FIG. 9 shows a procedure for issuing a one-scan end signal and a forced end signal. For example, the end signal input unit 1
When an end contact input is applied from 0, the one-scan end signal generator 11 issues a one-scan end signal to the one-scan end processor 12. The one-scan end processing unit 12 enters a standby state for a preset time, and this standby state is released after the elapse of the standby time or when the main processing ends. The main processing is completed within this standby time, and it is determined whether a one-scan end signal has been issued and the specified number of waveform data has been fetched. Then, also in the end input processing, the standby state is released by this, and the processing ends.

On the other hand, if the measurement process is being performed even after the elapse of the standby time, the standby state is thereby released, and
The one-scan termination processing unit 12 instructs the forced termination signal generation unit 13 to generate a forced termination signal. Forced end signal generator 1
3 outputs a forced termination signal to the forced termination processing unit 14. Since the forced termination processing unit 14 sees the forced termination signal even during the measurement process, the forced termination of the measurement process and the main process is completed even if the specified number of waveform data has not been captured.

With this configuration, when inputting the end signal, it is sufficient to input one type of end signal without considering the end of one scan and the forced end.
When the time required to acquire and store the specified number of waveform data is long, the forced end signal is valid. Does not cause any inconvenience.

In the above embodiment, an example in which a contact signal is used as an end signal input has been described. However, a communication input or an event input may be used.

[0014] Further, by providing means for displaying whether the end of the measurement process is the end of one scan after the acquisition of a specified number of waveform data has been completed or the forced end of the measurement process, the operation state of the waveform measurement apparatus is provided. It is effective to be able to accurately grasp the information.

[0015]

As described above, according to the present invention,
It is possible to realize a waveform measuring device that does not require selection of an end signal input operation unit.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a flow of the operation of FIG.

FIG. 3 is a block diagram showing an example of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input terminal 2 A / D converter 3 Memory 4 Display part 5 Operation control part 10 End signal input part 11 1 scan end signal generation part 12 1 scan end processing part 13 Forced end signal generation part 14 Forced end processing part

Claims (1)

(57) [Claims] An A / D for converting a measured waveform into a digital signal
A converter, a memory for storing output data of the A / D converter as waveform data, a display unit for reading out the waveform data stored in the memory and reproducing and displaying the measured waveform, an end signal input unit, and an end signal input unit A one-scan end signal generating unit for generating a one-scan end signal in accordance with the end signal added from the first unit, and monitoring the state of the measurement process after a preset standby time has elapsed from the generation of the one-scan end signal, and the measurement process is completed. If the measurement has not been completed, it is determined that the measurement of one scan has been completed. If the measurement has not been completed, a one-scan termination processing unit for instructing generation of a forced termination signal, and a forced termination signal for generating a forced termination signal in accordance with an instruction from the one-scan termination processing unit A waveform measurement device comprising: a generation unit; and a forced termination processing unit that terminates a measurement process according to a forced termination signal.