JP7266376B2 - Waveform display device and waveform display program - Google Patents

Description

The present invention relates to a waveform display device and a waveform display program, and more particularly to a waveform display device and a waveform display program for displaying on a display screen a waveform representing the temporal change of the measurement result of a physical quantity to be measured.

Conventionally, in a waveform display device that measures a physical quantity to be measured and displays a waveform showing the change over time of the measurement result on a display screen, low-speed waveform data with a different number of measurement samples per unit time for a predetermined physical quantity is used. There is known a device capable of acquiring high-speed waveform data and simultaneously displaying a waveform indicated by the low-speed waveform data and a waveform indicated by the high-speed waveform data on the same display screen (for example, Patent Reference 1).

The waveform measurement device described in Patent Document 1 displays a plurality of waveform data acquired with different "time axes" and "sampling rates" for a predetermined test object, and the analysis results of these plurality of waveform data in common. They are displayed simultaneously on the screen.
Specifically, the first waveform data acquired over a long period of time at a low sampling rate is displayed in the upper screen area of the display screen, and when a predetermined trigger condition is satisfied, the lower screen area displays the high-speed waveform data. A sub-display of second waveform data acquired for a predetermined period at a sampling rate is disclosed. In addition, it is disclosed that the analysis result of each waveform data is simultaneously displayed in each screen area.
With the above configuration, the waveforms of the first and second waveform data captured in different data storage areas and their analysis results can be confirmed at the same time.

JP 2013-64655 A

By the way, in the waveform display device as disclosed in Patent Document 1, the low-speed waveform data sampled at a low speed and the high-speed waveform data sampled at a high speed are simultaneously displayed on the display screen. Although it is not necessary to switch between waveforms, dividing the display screen into two screens narrows the screen area where the waveforms are displayed, making it difficult for the user to check (analyze) the waveforms on the display screen. There was fear.
Alternatively, in that case, there is a possibility that a user operation is required to switch the display of waveforms between partially enlarged display and reduced display on the display screen.

Further, in the waveform display device as disclosed in Patent Document 1, high-speed waveform data sampled at high speed is obtained when a predetermined trigger condition is satisfied. The manufacturing cost can be suppressed without requiring a relatively large capacity per se. However, since the low-speed waveform is displayed in the upper area of the display screen and the high-speed waveform is displayed in the lower area, the lower area may become a blank space for most of the period.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems. It is an object of the present invention to provide a waveform display device and a waveform display program that enable a user to more easily understand waveforms on a display screen when displaying them.
Another object of the present invention is to provide a waveform display device and a waveform display program capable of effectively using a screen area on a display screen when simultaneously displaying low-speed waveform data and high-speed waveform data on the same display screen. to do.

According to the waveform display device of the present invention, the waveform display device displays on the display screen a waveform representing the temporal change of the measurement result of the physical quantity to be measured, and the waveform display device comprises a trigger indicating a trigger condition related to the physical quantity. a storage unit for storing condition data; a trigger detection processing unit for outputting a predetermined trigger detection signal when detecting that the predetermined trigger condition is satisfied by referring to the trigger condition data; and a predetermined physical quantity. When receiving the first measurement data indicating the measurement result of and receiving the trigger detection signal from the trigger detection processing unit, the first measurement data and , a measurement data receiving unit for receiving second measurement data indicating a measurement result with a larger number of samples per unit time than the measurement result of the first measurement data in the predetermined physical quantity; and the received first measurement data, A waveform data generation unit that generates first waveform data and second waveform data representing respective waveforms from measurement results of each of the second measurement data, and waveforms represented by the first waveform data and the second waveform data, respectively and a data display processing unit that simultaneously displays on the same display screen, the data display processing unit displaying the first waveform indicated by the first waveform data, and displaying the predetermined waveform from the time of detection of the trigger condition. period, the second waveform indicated by the second waveform data is displayed at a target position on the first waveform, and the data display processing unit displays the display position of the first waveform at the time of detection of the trigger condition; calculating the target position for superimposing the second waveform on the first waveform from the start time of the second waveform, and calculating the target position on the first waveform from the first waveform to the second waveform; It is solved by switching to and displaying .
As described above, the data display processing unit simultaneously displays the first waveform and the second waveform respectively indicated by the first waveform data (low-speed waveform data) and the second waveform data (high-speed waveform data) on the same display screen. Since the second waveform is displayed at the target position on the first waveform for a predetermined period, the user can easily check the first waveform (low-speed waveform) and the second waveform (high-speed waveform) on the same display screen. It becomes a waveform display device capable of
More specifically, it is possible to display multiple waveforms at the same time without dividing the display screen into two as in the conventional method, and to display these waveforms on a larger screen at all times than in the conventional method. It can be checked (analyzed) in an easy-to-understand manner.
Also, when displaying the low-speed waveform data and the high-speed waveform data on the same display screen at the same time, it is possible to effectively use the screen area on the display screen.
In addition, with the above configuration, it is not necessary to manually switch the display from the first waveform to the second waveform on the display screen, so the user can easily check the waveform on the display screen without requiring complicated user operations. .

At this time, a first data storage section for storing the first waveform data and a second data storage section for storing the second waveform data are further provided, and the first data storage section corresponds to an auxiliary storage device. , The second data storage unit preferably corresponds to a main storage device.
As described above, the first waveform data (low-speed waveform data), which lasts for a long period of time but has a relatively small capacity due to its low speed, is stored in an auxiliary storage device (such as an SD memory card). By accumulating the second waveform data (high-speed waveform data), which records only a predetermined period of time, in the main storage device (built-in RAM, SSD unit, etc.), the waveform display device itself does not require a relatively large capacity, and the manufacturing cost is reduced. can be suppressed.

At this time, the waveform data generating unit further generates integrated waveform data by integrating information about the first waveform contained in the first waveform data and information about the second waveform contained in the second waveform data, The first data storage unit further stores the integrated waveform data, and the data display processing unit refers to the integrated waveform data, aligns the time intervals of the time axis on the display screen, and then displays the first data. Preferably, the waveform and the second waveform are displayed continuously.
As described above, by accumulating the integrated waveform data together with the first waveform data in the auxiliary storage device, when displaying the first waveform and the second waveform on the display screen, the integrated waveform data can be referred to. Since the waveform data and the second waveform data can be read out, the processing load on the device itself is reduced.

At this time, the trigger detection processing unit transmits a trigger start detection signal as the predetermined trigger detection signal when detecting that the trigger start condition is satisfied as the predetermined trigger condition, and detects the trigger start. After transmitting the signal, when it is detected that the trigger end condition is satisfied, the trigger end detection signal is transmitted, and the measurement data receiving unit detects the trigger end condition from the time when the trigger start condition is detected. It is preferable to receive the second measurement data up to.
With the above configuration, the measurement start point and the measurement end point of the second measurement data (second waveform data) are clearly configured. Therefore, while recording data for a predetermined physical quantity at low speed for a long time, pinpointing is performed at high speed. It becomes a waveform display device that can be recorded.

At this time, the data display processing section preferably simultaneously displays the waveforms included in the first waveform data and the second waveform data and the measured numerical values indicating the measurement results on the same display screen.
With the above configuration, waveforms and measured values can be displayed on the display screen at the same time. Ease of use is improved when the user evaluates.

Further, the trigger condition data indicating the trigger conditions related to the physical quantity stored in the computer as a waveform display device for displaying on the display screen a waveform representing the temporal change of the measurement result of the physical quantity to be measured is referred to. a trigger detection process for outputting a predetermined trigger detection signal when it is detected that the predetermined trigger condition is satisfied; first measurement data indicating a measurement result of a predetermined physical quantity; When the detection signal is received, the number of samples per unit time is greater than the measurement result of the first measurement data for the first measurement data and the predetermined physical quantity for a predetermined period based on the detection time of the trigger condition. measurement data reception processing for receiving second measurement data indicating many measurement results; and first waveform data and second waveform data indicating respective waveforms from the measurement results of the received first measurement data and second measurement data. waveform data generation processing for generating waveform data; and data display processing for simultaneously displaying waveforms represented by the first waveform data and the second waveform data on the same display screen, wherein the data display processing includes: and displaying a first waveform indicated by the first waveform data, and displaying a second waveform indicated by the second waveform data at a target position on the first waveform for the predetermined period from the detection of the trigger condition. and in the data display processing, the second waveform is superimposed on the first waveform from the display position of the first waveform at the time of detection of the trigger condition and the start time of the second waveform. It is also possible to realize a waveform display program that calculates the target position for matching, and switches and displays the first waveform to the second waveform at the target position on the first waveform.

According to the waveform display device and waveform display program of the present invention, when simultaneously displaying low-speed waveform data and high-speed waveform data with different numbers of measurement samples for a predetermined physical quantity on the same display screen, the user can It is possible to provide a waveform display device and a waveform display program that enable waveforms to be checked in a more comprehensible manner.
Further, it is possible to provide a waveform display device and a waveform display program that can effectively use the screen area on the display screen when simultaneously displaying the low-speed waveform data and the high-speed waveform data on the same display screen.

1 is a diagram showing a hardware configuration of a waveform display device according to the present invention; FIG. It is a figure which shows the software structure of a waveform display apparatus. It is a figure which shows an example of "trigger condition data." It is a figure explaining an example of a trigger detection process. It is a figure explaining an example of "integrated waveform data." FIG. 10 is a diagram showing an example of a waveform display screen; It is a figure which shows an example of a data display process. 4 is a flowchart showing an example of processing of a waveform display program according to the present invention; FIG.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. FIG.
The present embodiment is a waveform display device that displays a waveform representing a temporal change in the measurement result of a physical quantity to be measured on a display screen, stores trigger condition data indicating a trigger condition, and refers to the trigger condition data. outputs a trigger detection signal when it detects that a predetermined trigger condition is satisfied, receives the first measurement data indicating the measurement result of a predetermined physical quantity, and receives the trigger detection signal from the trigger detection unit second measurement data indicating a measurement result with a larger number of samples per unit time than the measurement result of the first measurement data in a predetermined physical quantity for a predetermined period with reference to the detection time of the trigger condition; First waveform data and second waveform data representing respective waveforms are generated from the measurement results of the measurement data and the second measurement data, respectively, and the waveforms represented by the first waveform data and the second waveform data are displayed on the same display screen. Simultaneously displaying, in particular, displaying the first waveform indicated by the first waveform data, and displaying the second waveform indicated by the second waveform data from the first waveform at the target position on the first waveform for a predetermined period from the time of detection of the trigger condition The main feature is that the display is automatically switched to
Note that the horizontal direction in the following description is the longitudinal direction of the display screen.

As shown in FIG. 1, the waveform display device 1 of the present embodiment communicates with a sensor with a data logger (not shown), receives measurement data (measurement signal) indicating a measurement result of a predetermined physical quantity from the sensor, It is a device for displaying, on a display screen, a waveform representing the change over time of the measurement result from the measurement data and a measurement value representing the measurement result.
Specifically, low-speed measurement data (first measurement data) is received for a predetermined physical quantity over a long period of time, and high-speed measurement data (second measurement data) is received for a predetermined period when a predetermined trigger condition is satisfied. is received, and when the first waveform and the second waveform based on the first measurement data and the second measurement data are simultaneously displayed on the same display screen, the target position on the first waveform in the predetermined period is It automatically switches to the second waveform and displays it.

Here, "physical quantity" means a quantity that expresses the physical properties and states of a substance system, and is the object of measurement by the waveform display device 1 in this embodiment. Specifically, voltage, temperature, humidity, acceleration, strain, pulse, and the like are examples of objects to be measured.
"Low-speed measurement data" and "high-speed measurement data" indicate measurement results in which the number of samples per unit time differs for a given physical quantity, and high-speed measurement data is faster than low-speed measurement data. This indicates a measurement result with a large number of samples per unit time. For example, a measurement result of 1000 samples per second (1 kS/s) can be considered for low speed, and a measurement result of 1,000,000 samples per second (1 MS/s) can be considered for high speed.
The “trigger condition” is a condition for restricting the start and end of reception of measurement results to an arbitrary timing. It shows the conditions for

<Hardware Configuration of Waveform Display Device>
As shown in FIG. 1, the waveform display device 1 includes a CPU 2 as a ROM, RAM, and data arithmetic and control processing device, a main storage device 3 as an HDD (SSD), and removable media such as a flash memory and an SD card. , a signal input unit 5, a display screen 6, and a user operation unit 7.
The CPU 2 stores a waveform display program in addition to a main program that performs necessary functions as a computer, and the functions of the waveform display device 1 are exhibited by executing these programs.

The signal input unit 5 is attached to the right end of the device, is connected to a sensor (not shown), receives measurement data (measurement signal), and converts physical quantities into digital data.
The display screen 6 is a liquid crystal display that is attached to the central portion of the device and displays information such as characters or images. This is for displaying a waveform display screen or the like shown to the user.
The user operation unit 7 receives input of user operations and inputs predetermined commands to the CPU 2. The operation keys attached to the left end of the device and the electrostatic It is mainly composed of a capacitive touch panel.
By operating the operation keys and the touch panel operation screen on the display screen 6, the user can start the waveform display program according to the present invention and display the waveform representing the temporal change of the measurement result of the predetermined physical quantity. .

<Software configuration of waveform display device>
As shown in FIG. 2, the waveform display device 1 is functionally described as follows: a storage unit 10 for storing "trigger condition data", various programs and various data shown in FIG. 3; A trigger setting unit 11 for setting a predetermined trigger condition by using a trigger setting unit 11, a trigger detection processing unit 12 for outputting a predetermined trigger detection signal when detecting that the set trigger condition is satisfied, and a measurement result of a predetermined physical quantity. The measurement data receiving unit 13 receives the first measurement data shown and receives the second measurement data for a predetermined period based on the detection time of the trigger condition when the trigger detection signal is received from the trigger detection processing unit 12. and a waveform data generation unit 14 for generating first waveform data and second waveform data representing respective waveforms from the measurement results of the received first measurement data and second measurement data, and accumulating the first waveform data. A first data accumulation unit 15, a second data accumulation unit 16 for accumulating second waveform data, and a data display processing unit for simultaneously displaying waveforms respectively indicated by the first waveform data and the second waveform data on the same display screen. 17 as main components.
These are composed of a CPU, ROM, RAM, HDD (SSD), conversion device, various programs, and the like.

The "trigger condition data" stored in the storage unit 10 is, as shown in FIG. 3, table data indicating trigger conditions related to physical quantities to be measured. This is data indicating the correspondence relationship between the start condition and the trigger end condition.
Specifically, "level", "time", "alarm", "external input", and "time" can be set as trigger start conditions for the measurement method "second measurement (high-speed measurement)". Similarly, "level", "time", "alarm", "external input", and "time" can be set as trigger termination conditions. In addition, detailed settings can be made for each trigger start condition and trigger end condition.
For the measurement method "first measurement (low-speed measurement)", the trigger start condition and trigger end condition are usually set to "no specification" or "time", and no special trigger condition is set. and

The trigger setting unit 11 receives an input of a predetermined user operation, refers to the trigger condition data shown in FIG. 3, and sets a predetermined trigger condition.
The trigger detection processing unit 12 outputs a trigger start detection signal toward the measurement data reception unit 13 when it detects that the set trigger start condition is satisfied, and after transmitting the trigger start detection signal, the trigger A trigger end detection signal is output when it is detected that the end condition is satisfied.
When the measurement data receiving unit 13 continuously receives the first measurement data from the sensor with a data logger (not shown) and receives the trigger start detection signal from the trigger detection processing unit 12, the trigger start condition is detected. , the second measurement data is intermittently received until the trigger end condition is detected.

As a specific example, in trigger detection of the rising range of the physical quantity "temperature", the trigger start condition "level (rise)" and "threshold 50 degrees" are set for the measurement method "second measurement (high-speed measurement)", When the trigger end conditions "level (falling)" and "threshold 20 degrees" are set, the results are as shown in Example 1 of FIG.
That is, the waveform display device 1 receives the measurement result of the physical quantity "temperature" at a low speed, and when the temperature measurement result exceeds the threshold value of 50 degrees at a predetermined timing, the measurement result is displayed based on the time when the threshold value is exceeded. Start reception at low speed and high speed. Thereafter, when the temperature measurement result falls below the threshold value of 20 degrees at a predetermined timing, the high-speed reception of the measurement result is terminated with reference to the point of time when the temperature falls below the threshold value, and the temperature measurement result is received at a low speed.

Further, as a specific example, in trigger detection of the vibration of the physical quantity "acceleration", the trigger start condition "level (outside range)" and "threshold ±20 m/s ² " for the measurement method "second measurement (high speed measurement)" is set, and the trigger end condition "time)" and "threshold 5 seconds" are set, the result is as shown in Example 2 of FIG.
That is, the waveform display device 1 receives the measurement result of the physical quantity "acceleration" at a low speed, and when the measurement result of the acceleration deviates from the threshold ±20 m/s ² at a predetermined timing, the time when the threshold is deviated is used as a reference. Start receiving measurement results at low speed and high speed. Then, when 5 seconds have elapsed from that time point, the high-speed reception of the measurement result ends, and the low-speed reception is started.

The waveform data generation unit 14 generates first waveform data and second waveform data representing respective waveforms from the measurement results of the first measurement data and the second measurement data received by the measurement data reception unit 13. .
Further, the "integrated waveform data" shown in FIG. 5 is generated by integrating the information regarding the first waveform contained in the first waveform data and the information regarding the second waveform contained in the second waveform data.
More specifically, the "integrated waveform data" includes information about the first waveform included in the first waveform data, such as "sampling interval", "number of measurement points", "start time", "end time", and "trigger time". information, and information about the second waveform contained in the second waveform data, including "sampling interval", "number of data (of second waveform data)", "number of measurement points", "start time", "end time", "trigger It is table data that integrates and manages information such as time.

The first data accumulation unit 15 accumulates the "first waveform data" and the "integrated waveform data" generated by the waveform data generation unit 14 and the "first measurement data" received by the measurement data reception unit 13. is. Specifically, it is stored in the auxiliary storage device.
More specifically, the first data storage unit 15 stores waveform data and measurement data by grouping them for each sensor (not shown) connected to the waveform display device 1, and stores them in a plurality of input channels attached to the sensors. Waveform data and measurement data are grouped and stored for each.
The second data storage unit 16 stores the “second waveform data” generated by the waveform data generation unit 14 and the “second measurement data” received by the measurement data reception unit 13 . Specifically, it is stored in the main memory.
More specifically, the second data storage unit 16 similarly stores a plurality of waveform data and measurement data while appropriately grouping them.

The data display processing unit 17 refers to the "first waveform data", the "second waveform data" and the "integrated waveform data" stored in the first and second data storage units 15 and 16, and displays the data shown in FIG. Thus, the waveforms respectively indicated by the first waveform data and the second waveform data are simultaneously displayed on the same display screen.
Also, referring to the "first measurement data", "second measurement data" and "integrated waveform data" accumulated in the first and second data accumulation units 15 and 16, the first measurement data and the second measurement data are obtained. The numerical values of the measurement results indicated by each are displayed simultaneously on the same display screen.
Specifically, the data display processing section 17 has a waveform data display processing section 17a and a measurement data display processing section 17b as specific functional sections.

As shown in FIG. 6, the waveform data display processing unit 17a displays the first waveform 6a indicated by the first waveform data on the same display screen 6, and also displays the first waveform 6a indicated by the first waveform data on the same display screen 6, and also displays the waveform from the trigger start condition detection point to the trigger end condition detection point. For a predetermined period up to, the target position on the first waveform 6a is automatically switched to the second waveform 6b indicated by the second waveform data and simultaneously displayed.
Specifically, as shown in FIG. 7, the waveform data display processing unit 17a calculates the display position of the first waveform at the time of trigger detection and the start time of the second waveform from the display position of the first waveform. , the display position (target position) of the second waveform is calculated. Then, the second waveform is continuously superimposed at the target position on the first waveform. Then, as shown in FIG. 6, the display is switched from the first waveform to the second waveform at the target position on the first waveform.
As described above, the waveform data display processing unit 17a aligns the time intervals of the time axis on the display screen 6, and then displays the first waveform 6a and the second waveform 6b continuously for the predetermined period, as shown in FIG. are displayed as intended.

Further, as shown in FIG. 6, the measurement data display processing unit 17b simultaneously displays the measurement numerical values 6c of the measurement results indicated by the first measurement data and the second measurement data in the vertical direction on the same display screen 6. ing.

According to the waveform display screen of FIG. 6, in the coordinate axes on which the waveforms 6a and 6b are displayed, the horizontal axis is the time axis and the vertical axis is the level axis (signal level axis). Waveforms 6a and 6b displayed on the coordinate axes represent how the measurement results change over time.
A scale interval 6d indicating a time interval per scale of the time axis is displayed above the coordinate axis. Here, the waveforms 6a and 6b are set to be displayed at "100 ms/DIV", that is, at intervals of 0.1 seconds per scale.
A sample rate 6e indicating the number of samples per second of the measurement result is displayed above the coordinate axis. Here, "1 ms (1 kS/s)" is displayed, indicating that the waveform is displayed with the measurement result of 1 sample per 0.001 second, that is, the measurement result of 1000 samples per second.
The time "12:34:56" (not shown) displayed at the lower end of the display screen 6 indicates the time after 12 hours, 34 minutes and 56 seconds have passed.

<Waveform display program>
Next, processing of the waveform display program executed by the waveform display device 1 will be described with reference to FIG.
The program according to the present embodiment includes the trigger setting unit 11, the trigger detection processing unit 12, the measurement data receiving unit 13, the waveform A utility program that integrates various programs for realizing the data generator 14, the first and second data storage units 15 and 16, and the data display processing unit 17, and the CPU of the waveform display device 1 Run the waveform display program.
The program is executed upon receipt of an operation instruction from a user.
The storage unit 10 of the waveform display device 1 stores "trigger condition data" shown in FIG.

In the waveform display process shown in FIG. 8, first, the trigger setting unit 11 receives an input of a predetermined user operation, refers to the trigger condition data shown in FIG. 3, and sets a predetermined trigger start condition and trigger end condition. It starts from step S1.
For example, as shown in FIG. 4, when triggering detection of the rising range of the physical quantity "temperature", the trigger start conditions "level (rise)" and "threshold 50 degrees" for the measurement method "second measurement (high-speed measurement)" , and set the trigger end conditions "level (falling)" and "threshold 20 degrees".

Next, in step S2, a predetermined user operation instruction is received, and a sensor with a data logger (not shown) starts measuring the physical quantity "temperature".
Then, in step S3, the measurement data receiving unit 13 starts receiving the first measurement data (low-speed measurement data) from the sensor.

Next, in step S4, when the measurement data receiving unit 13 receives a trigger start detection signal from the trigger detection processing unit 12 during measurement (step S4: Yes), the second measurement is performed based on the detection time of the trigger start condition. Data (high-speed measurement data) is further started to be received (step S5).
For example, when the measurement result of the physical quantity "temperature" is received at low speed, and when the temperature measurement result exceeds the threshold value of 50 degrees at a predetermined timing, reception of the measurement result is started at low speed and high speed based on the time when the threshold value is exceeded. do.

Next, when the measurement data receiving unit 13 receives the trigger end detection signal from the trigger detection processing unit 12 after the start of reception of the second measurement data (step S6: Yes), the reception of the second measurement data is completed. (Step S7), the process returns to step S4 to continue receiving the first measurement data.
On the other hand, when the trigger end detection signal is not received (step S6: No), the second measurement data is continuously received (returns to step S6). In other words, the second measurement data is received until the trigger end detection signal is received.
For example, after the start of reception of the second measurement data, when the temperature measurement result falls below the threshold value of 20 degrees at a predetermined timing, the high-speed reception of the measurement result is terminated with reference to the point in time when the temperature measurement result falls below the threshold value. , again at low speed.

Next, when the measurement data receiving unit 13 does not receive the trigger start detection signal from the trigger detection processing unit 12 during measurement (step S4: No), it continues to receive the first measurement data, and the sensor (not shown) When the measurement is stopped (step S8), reception of the first measurement data is also finished (step S9).
Then, in step S10, the waveform data generation unit 14 generates first waveform data and second waveform data representing respective waveforms from the measurement results of the first measurement data and the second measurement data received by the measurement data reception unit 13, respectively. to generate Also, the "integrated waveform data" shown in FIG. 5 is generated.
Then, in step S11, the first data accumulation unit 15 accumulates the "first waveform data", the "integrated waveform data", and the "first measurement data" (specifically, accumulation in the auxiliary storage device). ). Also, the second data accumulation unit 16 accumulates the "second waveform data" and the "second measurement data" (specifically, accumulates them in the main memory).

Finally, in step S12, the data display processing unit 17 refers to the "first waveform data", "second waveform data" and "integrated waveform data" stored in the first and second data storage units 15 and 16. Then, the waveforms indicated by the first waveform data and the second waveform data are simultaneously displayed on the same display screen.
Specifically, as shown in FIG. 6, a first waveform 6a indicated by the first waveform data is displayed on the same display screen 6, and a predetermined time period from the detection of the trigger start condition to the detection of the trigger end condition is displayed. , the first waveform 6a is switched to the second waveform 6b indicated by the second waveform data at the target position on the first waveform 6a, and displayed simultaneously.
Specifically, as shown in FIG. 7, the waveform data display processing unit 17a performs the display position of the first waveform at the time when the trigger start condition is detected and the start time of the second waveform to display the second waveform. A target position for superimposing the second waveform on the first waveform is calculated. Then, the display is switched from the first waveform to the second waveform at the target position on the first waveform.

The process of FIG. 8 is completed through steps S1 to S12.
With the configuration of the waveform display program described above, when simultaneously displaying low-speed waveform data and high-speed waveform data with different numbers of measurement samples for a given physical quantity on the same display screen, the user can easily understand the waveform on the display screen. can be confirmed.
<Other embodiments>

In the above embodiment, as shown in FIG. 2, the data display processing section 17 stores "first waveform data", "second waveform data" and "integrated Waveform Data", waveforms respectively indicated by the first waveform data and the second waveform data are displayed on the display screen, but the present invention is not particularly limited.
For example, the data display processing unit 17 receives "first waveform data", "second waveform data", and "integrated waveform data" from the waveform data generation unit 14, and the first waveform data and the second waveform data respectively indicate The waveform may be displayed on the display screen.

In the above embodiment, as shown in FIG. 6, the data display processing unit 17 displays the first waveform 6a on the same display screen, and also displays the first waveform 6a on the first waveform 6a for a predetermined period from the time when the trigger start condition is detected. Although the display is automatically switched from the first waveform 6a to the second waveform 6b at the target position, the method of displaying the first waveform 6a and the second waveform 6b is not particularly limited.
For example, the data display processing unit 17 displays the first waveform 6a on the same display screen as shown in FIG. The second waveform 6b may be superimposed (so as to be superimposed) on the display.

As described above, in the waveform display device 1, a waveform display program is stored in a recording medium readable by the waveform display device 1, and processing is executed by the waveform display device 1 reading out and executing this waveform display program. be. Here, the recording medium readable by the waveform display device 1 means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the waveform display program may be distributed to the waveform display device 1 via a communication line, and the waveform display device 1 receiving the distribution may execute the program.

In this embodiment, the waveform display device and waveform display program according to the present invention have been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from its spirit, and the present invention includes equivalents thereof.

1 waveform display device 2 CPU
3 Main storage device 4 Auxiliary storage device 5 Signal input unit 6 Display screen 6a First waveform (low-speed waveform)
6b Second waveform (high-speed waveform)
6c Measurement value 6d Graduation interval 6e Sample rate 7 User operation unit 10 Storage unit 11 Trigger setting unit 12 Trigger detection processing unit 13 Measurement data reception unit 14 Waveform data generation unit 15 First data storage unit 16 Second data storage unit 17 Data display Processing unit 17a Waveform data display processing unit 17b Measured numerical value display processing unit

Claims (5)

A waveform display device for displaying on a display screen a waveform representing a change over time in measurement results of a physical quantity to be measured,
a storage unit that stores trigger condition data indicating a trigger condition related to the physical quantity;
a trigger detection processing unit that refers to the trigger condition data and outputs a predetermined trigger detection signal when detecting that the predetermined trigger condition is satisfied;
receiving first measurement data indicating a measurement result of a predetermined physical quantity; and
When the trigger detection signal is received from the trigger detection processing unit, the first measurement data and the measurement result of the first measurement data in the predetermined physical quantity for a predetermined period based on the detection time of the trigger condition a measurement data receiving unit for receiving second measurement data indicating a measurement result with a large number of samples per unit time;
a waveform data generation unit that generates first waveform data and second waveform data representing respective waveforms from measurement results of the received first measurement data and second measurement data;
a data display processing unit that simultaneously displays waveforms respectively indicated by the first waveform data and the second waveform data on the same display screen,
The data display processing unit displays a first waveform indicated by the first waveform data, and displays the second waveform data at a target position on the first waveform for the predetermined period from the time when the trigger condition is detected. display a second waveform showing
The data display processing unit
calculating the target position for superimposing the second waveform on the first waveform from the display position of the first waveform at the time of detection of the trigger condition and the start time of the second waveform;
A waveform display device , wherein the display is switched from the first waveform to the second waveform at the target position on the first waveform . a first data accumulation unit that accumulates the first waveform data;
further comprising a second data accumulation unit that accumulates the second waveform data,
The first data storage unit corresponds to an auxiliary storage device, the second data storage unit corresponds to a main storage device,
The waveform data generating unit further generates integrated waveform data by integrating information about a first waveform included in the first waveform data and information about a second waveform included in the second waveform data,
The first data accumulation unit further accumulates the integrated waveform data,
The data display processing unit refers to the integrated waveform data, and continuously displays the first waveform and the second waveform on the display screen after aligning the time intervals of the time axis. The waveform display device according to claim 1 . The trigger detection processing unit
transmitting a trigger start detection signal as the predetermined trigger detection signal when it is detected that the trigger start condition is satisfied as the predetermined trigger condition; and
After transmitting the trigger start detection signal, when it is detected that the trigger end condition is satisfied, transmitting the trigger end detection signal,
3. The waveform display device according to claim 1, wherein the measurement data receiving section receives the second measurement data from the time when the trigger start condition is detected until the time when the trigger end condition is detected. The data display processing unit simultaneously displays the waveforms included in the first waveform data and the second waveform data and the measured numerical values indicating the measurement results on the same display screen. 4. The waveform display device according to any one of Items 1 to 3 . A computer as a waveform display device for displaying on a display screen a waveform representing the temporal change in the measurement result of the physical quantity to be measured,
a trigger detection process of referring to trigger condition data indicating a trigger condition related to the physical quantity stored in the computer and outputting a predetermined trigger detection signal when it is detected that the predetermined trigger condition is satisfied;
When the first measurement data indicating the measurement result of a predetermined physical quantity is received and the trigger detection signal is received, the first measurement data and the predetermined A measurement data reception process for receiving a second measurement data indicating a measurement result with a larger number of samples per unit time than the measurement result of the first measurement data in the physical quantity of
Waveform data generation processing for generating first waveform data and second waveform data representing respective waveforms from measurement results of the received first measurement data and second measurement data;
a data display process for simultaneously displaying the waveforms indicated by the first waveform data and the second waveform data on the same display screen;
In the data display process, the first waveform indicated by the first waveform data is displayed, and the second waveform data is indicated at a target position on the first waveform for the predetermined period from the time when the trigger condition is detected. Execute the process of displaying the second waveform ,
In the data display process, the target position for superimposing the second waveform on the first waveform from the display position of the first waveform at the time of detection of the trigger condition and the start time of the second waveform. is calculated and displayed by switching from the first waveform to the second waveform at the target position on the first waveform.

Images