JP7130096B2 - Waveform display device and waveform display program - Google Patents

Description

The present invention provides a waveform display device having a processing unit for displaying a cursor display for designating an arbitrary point in the signal waveform together with a signal waveform based on waveform data on a waveform display screen, and a waveform display device that performs such processing. relates to a waveform display program to be executed by the processing unit of .

As a waveform display device and waveform display program of this type, the applicant discloses a waveform recorder and its operation program in the following publications. This waveform recorder consists of an A/D converter that generates waveform data, a storage memory that stores the generated waveform data, a main body memory that stores system programs (operation programs), etc., and a system program that integrates the waveform recorder. and a CRT (display unit) for displaying signal waveforms based on waveform data under the control of the CPU.

In this case, with this type of waveform recorder (waveform display device), the measured value and measurement time (or the elapsed time from the start of measurement) at any point specified by the cursor display on the signal waveform can be displayed together with the signal waveform. It is configured so that it can be displayed numerically. Therefore, in the shape recorder disclosed by the applicant, a line cursor (cursor display) for designating an arbitrary point in the signal waveform can be displayed on the CRT together with the signal waveform.

In addition, in this type of waveform recorder (waveform display device), when changing the above arbitrary point specified by the cursor display, cursor movement operation is performed to move the cursor display, thereby changing the cursor display for the signal waveform. You can change the position of the cursor relative to the signal waveform by directly changing the position or scrolling the signal waveform by performing the waveform scroll operation to change the position of the signal waveform with respect to the cursor display. configured to allow

As a result, when there is a singular point in the signal waveform displayed on the CRT, by moving the cursor or scrolling the waveform so as to align the line cursor with the singular point, the measurement value or measurement of the singular point can be obtained. It is possible to display the time (elapsed time) and the like numerically together with the signal waveform.

Japanese Patent Application Laid-Open No. 5-5754 (pages 2-3, FIG. 1-5)

However, the conventional waveform display device including the waveform recorder disclosed by the applicant has the following problems to be improved. Specifically, in the conventional waveform display device, by moving the cursor or scrolling the waveform to align the line cursor with the peculiar point of the signal waveform (displaying the line cursor at the position of the peculiar point), the peculiar point is displayed. is configured to be able to numerically display the measured value, the measurement time (elapsed time), etc. together with the signal waveform.

In this case, the conventional waveform display device employs a configuration in which a line cursor (cursor display) is moved or a signal waveform is scrolled by rotating a jog dial or shuttle dial or pressing a move key or scroll key. ing. In recent years, there are also waveform display devices that can move a cursor display or scroll a signal waveform by dragging a mouse, touch pad, touch panel, or the like.

However, in any of the above configurations, it is difficult to accurately match the cursor display to the singular point of the signal waveform, and when the operation is hastily performed, the cursor display is displayed at a position slightly deviated from the singular point. Therefore, the measurement value and measurement time (elapsed time) for a point different from the singular point will be displayed. In addition, in order to accurately match the cursor display to the singular point, it is necessary, for example, to magnify the signal waveform and display the cursor at the desired position. becomes difficult to do. Therefore, it is preferable to improve this point.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and a main object of the present invention is to provide a waveform display device and a waveform display program that can easily display a cursor display at a desired position on a signal waveform.

In order to achieve the above object, a waveform display device according to claim 1 displays a signal waveform based on waveform data on a waveform display screen, and displays a cursor for designating an arbitrary point on the signal waveform. and a processing unit for displaying the waveform on the waveform display screen, the pointing device being capable of specifying an arbitrary position within the waveform display screen, wherein the processing unit includes the signal When the position specifying operation is performed by the pointing device while the waveform is being displayed on the waveform display screen, a circle having a predetermined width centered on the position specified by the position specifying operation. and when a singular point that satisfies a predetermined condition in the signal waveform exists within the search range, the cursor is positioned at a predetermined display position based on the position of the singular point. Show the display.

The waveform display device according to claim 2 is the waveform display device according to claim 1, wherein the processing unit expands the search range around the position designated by the pointing device at the end of the position designation operation. Identify.

The waveform display device according to claim 3 is the waveform display device according to claim 1, wherein the processing unit expands the search range around the position designated by the pointing device at the start of the position designation operation. Identify.

The waveform display device according to claim 4 is the waveform display device according to any one of claims 1 to 3, wherein the processing unit performs the predetermined search when the position specifying operation is performed. Display the search range display indicating the range on the waveform display screen.

Further, the waveform display program according to claim 5 displays a signal waveform based on waveform data on a waveform display screen, and displays a cursor for designating an arbitrary point in the signal waveform together with the signal waveform. A waveform display program for causing a processing unit of a waveform display device to execute a process for displaying on a display screen, wherein an arbitrary position within the waveform display screen is displayed while the signal waveform is being displayed within the waveform display screen. When a position designating operation is performed by a pointing device, a circular search range having a predetermined width centered on the position designated by the position designating operation is specified, and the signal waveform is defined in advance. When a peculiar point that satisfies the specified condition exists within the search range, the processing unit is caused to display the cursor display at a predetermined display position based on the position of the peculiar point.

In the waveform display device according to claim 1, when a position designation operation is performed by a pointing device while the signal waveform is being displayed on the waveform display screen, the processing unit displays the position designated by the position designation operation. A circular search range having a predetermined width as the center is specified, and when a singular point satisfying a predetermined condition in the signal waveform exists within the search range, the position of the singular point is used as a reference. Display the cursor display at the specified display position. Further, the waveform display program according to claim 5 causes the processing section of the waveform display device to execute the above processing.

Therefore, according to the waveform display device of claim 1 and the waveform display program of claim 5 , when the singular point itself to be displayed in correspondence with the cursor display can be specified accurately, the singular point can be displayed. It goes without saying that the cursor display can be displayed in correspondence with the cursor display. A singular point is automatically searched for, and a cursor display is automatically displayed at the position corresponding to the singular point. Therefore, even a person who is unfamiliar with the operation of this type of device can reliably and easily display a cursor display at a position for designating an arbitrary singular point.

According to the waveform display device of claim 2 and the waveform display program that causes the processing unit thereof to execute processing for displaying the signal waveform and the cursor display, the processing unit is designated by the pointing device at the end of the position designation operation. By specifying the search range centered on the position specified, even if you specify a position that specifies a search range that does not include a singular point at the start of the position specifying operation (a position away from the singular point), A desired singular point can be reliably detected by performing a drag operation toward a position (a position near the singular point) where a search range including the singular point is specified.

According to the waveform display device of claim 3 and the waveform display program that causes the processing unit thereof to execute the process of displaying the signal waveform and the cursor display, the processing unit is designated by the pointing device at the start of the position designation operation. By specifying the search range centered on the position specified, even though the position where the search range containing the singular point is specified at the start of the position specifying operation (position near the singular point), Even if you specify a position (a position away from the singularity) that specifies a search range that does not include the singularity at the end of the position specifying operation, the desired singularity will be found based on the initially specified position. The singular point can be reliably detected by specifying the search range in which the point is detected.

According to the waveform display device of claim 4 and the waveform display program that causes the processing unit thereof to execute the process of displaying the signal waveform and the cursor display, the processing unit predefines when a position specifying operation is being performed. By displaying on the waveform display screen a search range display indicating the specified search range, it is possible to determine whether the position specified by the position specifying operation is the position where the search range including the singular point is specified, or whether the search range including the singular point is specified. It is possible to reliably and easily recognize whether or not the search range in which the data is not found is the specified position. Thereby, a desired singular point can be detected more reliably.

1 is a configuration diagram showing the configuration of a measurement system 100; FIG. FIG. 5 is a display screen diagram showing an example of a display condition setting screen 20; FIG. 11 is an explanatory diagram for explaining a position specifying operation; 3 is a display screen diagram showing an example of a waveform display screen 30. FIG. FIG. 10 is a display screen diagram of a waveform display screen 30 in a state where a cursor display 31 is aligned with a peculiar point Pb1 of a signal waveform W1 and displayed. FIG. 10 is a display screen diagram of a waveform display screen 30 in a state where a cursor display 31 is aligned with a peculiar point Pb2 of a signal waveform W1 and displayed. FIG. 3 is a display screen diagram of a waveform display screen 30 in a state where a cursor display 31 is aligned with a peculiar point Pb3 of a signal waveform W1 and displayed. 8 is a display screen diagram showing another example of the waveform display screen 30. FIG. FIG. 10 is a display screen diagram of a waveform display screen 30 in a state where a cursor display 31 is aligned with a peculiar point Pb4a of a signal waveform W1 and displayed. 8 is a display screen diagram showing still another example of the waveform display screen 30. FIG. FIG. 10 is a display screen diagram of a waveform display screen 30 in a state where a cursor display 31 is aligned with a singular point Pb5 of a signal waveform W1 and displayed. 8 is a display screen diagram showing still another example of the waveform display screen 30. FIG. FIG. 10 is a display screen diagram of the waveform display screen 30 in a state where a cursor display 31a is aligned with a peculiar point Pb6 of the signal waveform W1 and displayed. 8 is a display screen diagram showing still another example of the waveform display screen 30. FIG. FIG. 10 is a display screen view of the waveform display screen 30 in a state where a cursor display 31a is aligned with a peculiar point Pb7 of the signal waveform W1 and displayed. 1 is a configuration diagram showing the configuration of a measuring device 200; FIG.

Embodiments of a waveform display device and a waveform display program will be described below with reference to the accompanying drawings.

A measurement system 100 shown in FIG. 1 includes a measurement device 1 and a waveform display device 2, and is configured to be able to perform measurement processing on a measurement target and display processing of signal waveforms based on the measurement results.

The measuring device 1 measures a predetermined measured quantity (for example, an electrical parameter such as a current value, a voltage value, a resistance value, and a phase of an input signal) to obtain measured value data Dw (“waveform data”). example), and transmit the generated measured value data Dw to the waveform display device 2 . In this case, the measuring device 1 of this example includes, as an example, a communication unit configured with a communication adapter capable of wireless communication conforming to a short-range wireless communication standard such as the Bluetooth (registered trademark) standard, and various control functions. It is configured to be able to transmit and receive signals and measured value data Dw by wireless communication.

The waveform display device 2 corresponds to a “waveform display device” and is configured by, for example, a tablet terminal, a smartphone, or a personal computer in which program data Dp corresponding to a “waveform display program” is installed. Specifically, the waveform display device 2 includes a communication section 11 , an operation section 12 , a display section 13 , a processing section 14 and a storage section 15 . In this example, as an example, the waveform display device 2 is configured by a tablet terminal. Therefore, illustrations and descriptions of components other than the components 11 to 15 in the tablet terminal are omitted.

The communication unit 11, like the communication unit of the measuring device 1 described above, is composed of a communication adapter capable of wireless communication conforming to a short-range wireless communication standard such as Bluetooth. As will be described later, the communication unit 11 transmits and receives various data to and from various wireless communication devices such as the measurement device 1 under the control of the processing unit 14 . The operation unit 12 includes a touch panel, which is an example of a "pointing device capable of specifying an arbitrary position within the waveform display screen", and various operation switches such as a power switch and a volume switch. A corresponding operation signal is output to the processing unit 14 . As will be described later, the display unit 13 displays various displays such as a display condition setting screen 20 (see FIG. 2) and a waveform display screen 30 (an example of a “waveform display screen”: see FIGS. 4 to 15) under the control of the processing unit 14. display the screen.

The processing unit 14 is an example of a “processing unit” and comprehensively controls the waveform display device 2 . Specifically, the processing unit 14 controls the measuring device 1 via the communication unit 11 according to the program data Dp to execute the measurement process, and the measurement value data Dw transmitted from the measuring device 1 is transmitted to the communication unit 11. , the measured value data Dw is stored in the storage unit 15 . Further, the processing unit 14 causes the display unit 13 to display the display condition setting screen 20 shown in FIG. 2 in accordance with the program data Dp. 15) is displayed. In this example, the cursor displays 31 and 31a correspond to "cursor display".

Furthermore, the processing unit 14 causes the display unit 13 to display a waveform display screen 30 as shown in FIGS. (sometimes referred to as "signal waveform W"), and cursor displays 31 and 31a for designating an arbitrary point on the signal waveform W are displayed in the waveform display screen 30. FIG. In this example, each signal waveform W described above corresponds to a "signal waveform". The storage unit 15 stores a system program for operating the waveform display device 2 as a tablet terminal, program data Dp corresponding to a “waveform display program”, measurement value data Dw transmitted from the measurement device 1, and the like.

Next, display processing of the signal waveform W by the measurement system 100 (waveform display device 2: program data Dp) will be described with reference to the accompanying drawings. It is assumed that installation of the program data Dp to the waveform display device 2 and Bluetooth pairing between the communication unit of the measurement device 1 and the communication unit 11 of the waveform display device 2 have already been completed.

First, the operation section 12 of the waveform display device 2 is operated to activate the program data Dp. Next, a measurement condition setting screen (not shown) is displayed on the display unit 13 to set the conditions of the measurement process to be executed by the measuring apparatus 1, and the display condition setting screen 20 shown in FIG. A condition for displaying the cursor display 31 in 30 is set.

In this case, in the waveform display device 2 (program data Dp) of this example, as will be described later, in a state in which the signal waveform W is displayed in the waveform display screen 30, the operation unit 12 (touch panel) performs a "position specifying operation". is performed, a predetermined "search range" based on the position designated by the "position specifying operation" is specified, and a "singular point that satisfies the predetermined condition" in the signal waveform W is A configuration and method for displaying the cursor display 31 (or cursor display 31a) at a "predetermined display position" based on the position of the singular point when it exists within the "search range" is adopted.

Further, in the waveform display device 2 (program data Dp) of this example, as the "singular point that satisfies the predetermined condition", as in the example of the display condition setting screen 20 shown in FIG. Position of the maximum value within the search range", "Minimum value: Position of the minimum value within the search range", "Zero cross: Position where the signal waveform crosses zero within the search range", "Rise: Signal waveform within the search range rising edge", "Falling position: position where the signal waveform falls within the search range", "Change point/noise: Position where the signal waveform changes rapidly", and "Waveform intersection point: 2 A plurality of types of "candidate conditions" are prepared, such as the position where two signal waveforms intersect. It is configured so that candidates can be arbitrarily selected. Note that this figure shows a state in which the three conditions of "zero cross", "change point/noise", and "waveform intersection" are set to be "singular points satisfying predetermined conditions". (an example of a configuration of "configured so that a plurality of condition candidates for the condition defined as a pre-defined condition can be selected").

Furthermore, in the waveform display device 2 (program data Dp) of this example, when there are a plurality of selected "candidate conditions", by setting the priority of the conditions of each "candidate condition", multiple When multiple types of "singular points" that satisfy the conditions of the "candidate conditions" exist within the "search range", the condition of the "candidate conditions" with the highest priority is set to "predetermined conditions ” is adopted. Note that FIG. 2 shows a state in which the priorities are set in the order of "change point/noise", "zero cross" and "waveform intersection".

In addition, in the waveform display device 2 (program data Dp) of this example, as the above-mentioned "position specifying operation", not only specification of an arbitrary point by a tap operation (touch operation) on the operation unit 12 (touch panel) but also a drag operation It is possible to specify an arbitrary point by .

In this case, it is not easy to perform a highly accurate position specifying operation using a pointing device such as a touch panel. Therefore, as shown in FIG. 3, for example, when a tap operation is performed to designate a position P0, the finger may touch a position P1 away from the position P0. In this case, by setting in advance that ``the position of the end point of the drag operation is [designated position]'', the finger can be slid on the touch panel in the direction of arrow A from position P1 (drag operation execution), and by releasing the finger from the touch panel at a position P2 sufficiently close to the position P0, a position P2 very close to the position P0 can be specified.

Further, for example, when a tap operation to specify the position P0 is attempted, the finger touches the position P2 very close to the position P0, but the finger is not moved by the arrow mark on the touch panel before the finger is removed from the touch panel. The finger may slide in direction B (execution of a drag operation) and the finger may be released from the touch panel at position P3. In this case, by setting in advance that "the position of the starting point of the drag operation is [designated position]", the finger can slide in the direction of arrow B from position P2 toward position P3 on the touch panel. However, it is possible to designate a position P2 very close to the position P0.

Therefore, which of the starting point and the ending point of the drag operation is to be set as the "specified position" is selected according to the user's preference and the tendency of the operation. Note that FIG. 2 illustrates a state in which the "drag operation end point" is set to be the "designated position".

Next, the measurement device 1 is connected to the object to be measured, and the operation unit 12 of the waveform display device 2 is operated to display a measurement processing screen (not shown) on the display unit 13, thereby starting the measurement processing by the measurement device 1. . At this time, the processing unit 14 causes the communication unit 11 to transmit a control signal for instructing the start of measurement to the measuring device 1, and in response to this, the measuring device 1 executes measurement processing to generate measured value data Dw. do. Further, the measuring device 1 transmits the generated measured value data Dw to the measuring device 1, and the waveform display device 2 processes the measured value data Dw transmitted from the measuring device 1 when the communication unit 11 receives the measured value data Dw. The unit 14 causes the storage unit 15 to store the measured value data Dw.

On the other hand, when the measurement processing by the measuring device 1 is completed and the measured value data Dw for a predetermined time is stored in the storage unit 15, by operating the operation unit 12 of the waveform display device 2, as shown in FIG. , causes the display unit 13 to display the waveform display screen 30 . In this case, the waveform display screen 30 displays a signal waveform W1 based on the measured value data Dw and a cursor display 31 for designating an arbitrary point on the signal waveform W1. This cursor display 31 is a display that functions as an index for designating an arbitrary point in the direction of the time axis in each signal waveform W such as the signal waveform W1. When the waveform display screen 30 is displayed on the display unit 13, a cursor display 31 is displayed at the center of the waveform display screen 30 in the time axis direction (horizontal direction in the figure).

In this case, for example, when it is desired to specify the measurement time (elapsed time) at which the signal waveform W1 shown in FIG. At this time, in the waveform display device 2 (program data Dp) of this example, even if the peculiar point Pb1 cannot be specified accurately, a cursor can be displayed by specifying an arbitrary position near the peculiar point Pb1. 31 can be displayed according to the singular point Pb1.

Specifically, a "position specifying operation" is performed to set the singular point Pb1 to "an arbitrary position (target position) within the waveform display screen". At this time, when a position Pa1 near the singular point Pb1 is designated, that is, when a tap operation is performed on the position Pa1, or when a drag operation is performed with the position Pa1 as the end point, the processing unit 14, according to the program data Dp, first identifies a circular "search range" with a predetermined width centered on the position Pa1, and displays a search range display 32 ("search range display ”) is displayed on the waveform display screen 30 .

Note that in the waveform display device 2 (program data Dp) of this example, the circular range indicated by the search range display 32 is defined as " a circular search of a predetermined width centered on the position specified by the position specifying operation. Equivalent to "range". Further, in the waveform display device 2 (program data Dp) of the present example, as an example, even when either a tap operation or a drag operation is performed, the finger touches the touch panel until it leaves the touch panel. A configuration is adopted in which the search range display 32 is displayed by specifying the center of the site at which the subject is present as the "specified position" and specifying a circular range centered at the "specified position" as the "search range".

Therefore, in this example, when the singular point Pb1 is included inside the search range display 32, if the finger is removed from the touch panel at that time and the singular point Pb1 is not included inside the search range display 32, (When the singular point Pb1 is positioned outside the search range display 32), by performing a drag operation to a position where the singular point Pb is included in the search range display 32 and then releasing the finger from the touch panel, A position where the point Pb1 is included in the "search range" can be reliably specified as the "designated position".

Next, according to the program data Dp, the processing unit 14 determines whether or not there is a “singular point” that satisfies the conditions of the “candidate conditions” selected on the display condition setting screen 20 within the specified “search range”. do. At this time, when the condition of "zero cross" is selected, the processing unit 14 determines that there is a singular point Pb1 that satisfies the condition of "zero cross" within the specified "search range" ("zero cross"). When a singular point that satisfies a predetermined condition exists within the search range”).

Subsequently, according to the program data Dp, the processing unit 14 superimposes the position of the singular point Pb1 on the singular point Pb1 as shown in FIG. to display the cursor display 31. Thereby, the singular point Pb1 is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb1 are displayed on the waveform display screen 30 together with the signal waveform W1.

Further, when specifying the minimum value and the measurement time (elapsed time) of the signal waveform W1 shown in FIG. 4, it is necessary to align the cursor display 31 with the singular point Pb2. At this time, by designating the singular point Pb2 itself or the vicinity of the singular point Pb2 (for example, the position Pa2) as the "specified position", the above-mentioned singular point Pb1 is aligned with the cursor display 31 and displayed. Similarly, as shown in FIG. 6, it is possible to display a cursor display 31 aligned with the singular point Pb2. Thereby, the singular point Pb2 is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb2 are displayed on the waveform display screen 30 together with the signal waveform W1.

Furthermore, when it is desired to specify the measured value and the measurement time (elapsed time) of the noise occurrence location in the signal waveform W1 shown in FIG. At this time, the singular point Pb3 itself or the vicinity of the singular point Pb3 (for example, the position Pa3) is designated as the "specified position", thereby displaying the cursor display 31 aligned with the singular points Pb1 and Pb2. In the same way as when, as shown in FIG. 7, it is possible to display a cursor display 31 aligned with the singular point Pb3. Thereby, the singular point Pb3 is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb3 are displayed on the waveform display screen 30 together with the signal waveform W1.

On the other hand, when it is desired to specify the measured value and the measurement time (elapsed time) of the noise occurrence location in the signal waveform W2 shown in FIG. At this time, for example, in a state where two "condition candidates" of "change point/noise" and "zero crossing" are selected (enabled), the position Pa4 is designated as the "designated position". Sometimes, not only the singular point Pb4a that satisfies the condition of "point of change/noise" but also the singular point Pb4b that satisfies the condition of "zero cross" exist within the "search range" centering on the position Pa4. .

In such a state, when a "position specifying operation" is performed with the position Pa4 as the "specified position", the processing unit 14, according to the program data Dp, first specifies a predetermined wide area centered on the position Pa4. A circular “search range” of height is specified, and a search range display 32 indicating the specified “search range” is displayed on the waveform display screen 30 . Next, according to the program data Dp, the processing unit 14 determines that two singular points Pb4a and Pb4b exist within the specified "search range".

At this time, the processing unit 14 determines which "priority" is higher between the "condition candidate" with the "change point/noise" and the "condition candidate" with the "zero cross". In this case, as shown in FIG. 2, the "priority" of the "condition candidate" with "change point/noise" is set higher than the "priority" of the "condition candidate" with "zero crossing". Therefore, the processing unit 14 identifies the peculiar point Pb4a that satisfies the 'change point/noise' and 'candidate condition' as 'the peculiar point that satisfies the predetermined condition'.

Next, according to the program data Dp, the processing unit 14 superimposes the position of the singular point Pb4a on the singular point Pb4a as shown in FIG. A cursor display 31 is displayed. Thereby, the singular point Pb4a is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb4a are displayed on the waveform display screen 30 together with the signal waveform W2.

Further, when it is desired to specify the measured value and the measurement time (elapsed time) at the intersection of the signal waveforms W3 and W4 shown in FIG. At this time, by specifying the singular point Pb5 itself or the vicinity of the singular point Pb5 (for example, the position Pa5) as the "specified position", the cursor display 31 is displayed along with the singular points Pb1 to Pb3 and Pb4a. As shown in FIG. 11, the cursor display 31 can be displayed by aligning it with the singular point Pb5. Thereby, the singular point Pb5 is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb5 are displayed on the waveform display screen 30 together with the signal waveforms W3 and W4.

Furthermore, when it is desired to specify the measured value and the measurement time (elapsed time) of the rising position of the signal waveform W5 shown in FIG. At this time, by specifying the singular point Pb6 itself or the vicinity of the singular point Pb6 (for example, the position Pa6) as a "specified position", the cursor display 31 is aligned with the singular points Pb1 to Pb3, Pb4a, and Pb5. As shown in FIG. 13, it is possible to display the cursor display 31 aligned with the peculiar point Pb6 in the same manner as when the cursor display 31 is displayed. Thereby, the singular point Pb6 is designated by the cursor display 31, and the measured value and the measurement time (elapsed time) of the singular point Pb6 are displayed on the waveform display screen 30 together with the signal waveform W5.

On the other hand, in the waveform display device 2 (program data Dp) of this example, instead of the cursor display 31 functioning as an index for designating an arbitrary point in the direction of the time axis in each signal waveform W, as shown in FIG. Along with the signal waveform W, a cursor display 31a functioning as an index for designating an arbitrary point in the signal level direction in each signal waveform W can be displayed on the waveform display screen 30. FIG. In the figure, immediately after the cursor display 31a is displayed on the waveform display screen 30, at the center of the waveform display screen 30 in the signal level direction (vertical direction in the figure) (the part where the signal level is "0") The state in which the cursor display 31a is displayed is illustrated.

In this case, for example, when it is desired to specify the maximum value and the measurement time (elapsed time) in the signal waveform W6 shown in FIG. At this time, by specifying the singular point Pb7 itself or the vicinity of the singular point Pb7 (for example, the position Pa7) as the "specified position", the cursor display 31a is aligned with the singular point Pb7 as shown in FIG. can be displayed. Thereby, the singular point Pb7 is designated by the cursor display 31a, and the measured value and the measurement time (elapsed time) of the singular point Pb7 are displayed on the waveform display screen 30 together with the signal waveform W6.

Although different from any of the above examples, the "position specifying operation" is performed while the signal waveform W is being displayed on the waveform display screen 30, and the position specified by the "position specifying operation" is the center . When there is no score that satisfies the conditions of the pre-selected "condition candidate" within the circular "search range" of a predetermined size , the processing unit 14 performs, as an example, a "position specifying operation A cursor display 31 is displayed in accordance with the position designated by ". As a result, the measured value and the measured time (elapsed time) of an arbitrary point other than the singular point are displayed together with the signal waveform W on the waveform display screen 30 .

As described above, in the waveform display device 2, the processing unit 14 displays the signal waveform W in the waveform display screen 30, and the pointing device (in this example, the touch panel of the operation unit 12) performs a "position specifying operation." ” is performed, a circular “search range” having a predetermined width centered on the position designated by the “position designation operation” is specified, and a predetermined condition in the signal waveform W is specified. When a satisfying singular point exists within the "search range", cursor displays 31 and 31a are displayed at a predetermined display position (in this example, the position of the singular point itself) with reference to the position of the singular point. Further, the program data Dp causes the processing section 14 of the waveform display device 2 to execute the above processing.

Therefore, according to the waveform display device 2 and the program data Dp, when the singular point itself to be displayed in association with the cursor displays 31 and 31a can be specified accurately, the cursor displays 31 and 31a can be displayed in correspondence with the singular point. 31a can be displayed, and even if an arbitrary position in the vicinity of the singular point to be displayed in association with the cursor displays 31 and 31a is designated as the "designated position", the "designated position" is the center . A singular point within the "search range" is automatically searched, and cursor displays 31 and 31a are automatically displayed at positions corresponding to the singular point. Therefore, even a person unfamiliar with the operation of this type of device can reliably and easily display the cursor displays 31 and 31a at positions for designating arbitrary singular points.

Further, according to the waveform display device 2 and the program data Dp, the processing unit 14 specifies the "search range" centering on the position designated by the pointing device at the end of the "position designation operation". Even if you specify a position (a position away from the singularity) where the "search range" that does not contain the "singularity" is specified at the start of the "position specifying operation", the " A desired singular point can be reliably detected by performing a drag operation toward a position where the "search range" is specified (a position near the singular point).

Further, according to the waveform display device 2 and the program data Dp, the processing unit 14 specifies the "search range" centering on the position designated by the pointing device at the start of the "position designation operation". At the start of the "position specification operation", the position where the "search range" containing the "singularity" is specified (the position near the singularity) was specified, but the "position specification operation" ended. Even if you specify a position (a position away from the singularity) where the "search range" that does not include the "singularity" is specified in the The peculiar point can be reliably detected by specifying the "search range" to be detected.

Further, according to the waveform display device 2 and the program data Dp, the processing unit 14 displays the search range display 32 indicating the predetermined "search range" on the waveform display screen when the "position specifying operation" is being performed. 30, the position specified by the "position specifying operation" is the position where the "search range" including the "singular point" is specified, or the "search range" not including the "singular point" is displayed. It is possible to reliably and easily recognize whether the "range" is the specified position. Thereby, a desired singular point can be detected more reliably.

Further, according to the waveform display device 2 and the program data Dp, the processing unit 14 handles the condition of the "candidate condition" selected from a plurality of "candidate conditions" as the "predetermined condition". By determining whether or not the singular point exists within the "search range", it is possible to easily display the cursor displays 31 and 31a at desired display positions in association with the singular point that satisfies various conditions.

Furthermore, according to the waveform display device 2 and the program data Dp, the processing unit 14 has a plurality of types of singular points that satisfy the conditions of a plurality of "condition candidates" with different "priorities" existing within the "search range". Sometimes, the condition of the "candidate condition" with the highest "priority" is set as a "predefined condition", and a predefined display position (in this example , the position of the singular point itself), the preset priority can be set when a plurality of types of singular points coexist within an extremely narrow range in the waveform display screen 30. Cursor displays 31 and 31a can be reliably and easily displayed corresponding to a singular point with a high .

The configuration of the "waveform display device" and the processing procedure of the "waveform display program" are not limited to the configuration of the waveform display device 2 and the processing procedure of the waveform display program. For example, although the configuration including the operation unit 12 having a touch panel as a pointing device has been described as an example, instead of the touch panel (or in addition to the touch panel), various devices such as a mouse, trackball, touch pad, and touch pen may be used. pointing device.

Also, the configuration and method for identifying the "search range" centering on the "positions (positions Pa1 to Pa7) specified by the position specifying operation" have been described. It is also possible to employ configurations and methods that specify the "search range" as either of the ends of , or either of the ends in the signal level direction. Furthermore, the configuration and method for identifying a circular "search range" centered on the "specified position (positions Pa1 to Pa7)" has been described as an example, but the shape of the "search range" is not limited to a circle. , a configuration and method for specifying a "search range" such as a rectangle (square or rectangle), triangle, polygon, and ellipse based on the "specified position". Also, the "search range display" is not limited to a display mode in which the "search range" is indicated by a line (broken line in this example) like the search range display 32 in the above example, and "within the search range" is displayed. It is also possible to make the display color or background pattern different so as to distinguish between "out of search range" and "search range display" (not shown).

Also, the "singular point that satisfies a predetermined condition in the signal waveform" is the "maximum value", "minimum value", "zero crossing", "rise", "fall", and "point of change/noise" in the above examples. ” and “intersection points of waveforms”. For example, "Elapsed time from the start of measurement at every XX seconds (XX seconds is an arbitrary set time)", "When [predetermined condition] to start some process is met: Trigger "point" and "point arbitrarily specified by the user during the measurement process (point at which a mark indicating an arbitrary point is given): event mark" Any configuration and method of display can be employed. Furthermore, the cursor display 31, 31a is displayed with the positions of the identified singular points (the singular points Pb1 to Pb3, Pb4a, Pb5 to Pb7) themselves as "predetermined display positions based on the positions of the singular points", and I explained the method as an example, but the position "XX seconds after the identified singularity" or "XX seconds before the identified singularity" ("XX seconds" is an arbitrary time) It is also possible to employ a configuration and method for displaying a "cursor display" on the .

Also, the cursor displays 31 and 31a displayed on the waveform display screen 30 before the start of the "position specifying operation" are changed to a circular shape with a predetermined width centered on the position specified by the "position specifying operation". Processing to display at a position corresponding to the singular point (the position of the singular point itself) within the "search range", that is, processing to move the cursor display 31, 31a within the waveform display screen 30 before and after the "position specifying operation" is executed. However, instead of such a configuration and method, without displaying the "cursor display" in the "waveform display screen" before the start of the "position specifying operation", " When a singular point exists within a circular "search range" with a predetermined width centered on the position specified by the "position specifying operation", the position corresponding to the singular point (for example, the position of the singular point itself ) can also adopt a configuration and method for displaying a "cursor display".

In addition, an example has been described in which the measuring device 1 that generates the measured value data Dw and the waveform display device 2 that displays the signal waveform W based on the measured value data Dw are configured separately. A single device may be configured to generate and display a "signal waveform" based on the "waveform data". Specifically, the measuring device 200 shown in FIG. 16 is another example of the “waveform display device” and includes a measuring unit 201, an operating unit 202, a display unit 203, a processing unit 204, and a storage unit 205. It is configured to be able to independently execute the measurement process for the object and the display process of the signal waveform based on the measurement result. Elements similar to those of the measuring system 100 described above with respect to the measuring apparatus 200 are denoted by the same reference numerals, and overlapping descriptions are omitted.

In this case, the measurement unit 201 is configured to be able to execute a measurement process of measuring a predetermined measured quantity and generating measurement value data Dw in the same manner as the measurement device 1 in the measurement system 100 described above. The operation unit 202 includes various operation switches for operating the measurement apparatus 200, and is similar to the operation unit 12 of the waveform display device 2 in the measurement system 100 described above. It is configured to include a touch panel or the like, which is an example of a "pointing device capable of performing a position specifying operation to specify a position." Further, the display unit 203 displays various display screens such as the display condition setting screen 20 and the waveform display screen 30 under the control of the processing unit 24 in the same manner as the display unit 13 of the waveform display device 2 in the measurement system 100 .

Also, the processing unit 204 is another example of a “processing unit” and controls the measuring device 200 in a comprehensive manner. The processing unit 204 causes the storage unit 205 to store the measured value data Dw transmitted from the measurement unit 201 in the same manner as the processing unit 14 of the waveform display device 2 in the measurement system 100 described above, and also causes the display condition setting screen 20 to be displayed. is displayed on the display unit 203 to set the conditions for displaying the cursor displays 31 and 31a in the waveform display screen 30 . Further, the processing unit 204 causes the display unit 203 to display the waveform display screen 30, and displays the signal waveform W based on the measured value data Dw and cursor displays 31 and 31a for designating an arbitrary point on the signal waveform W on the waveform display screen. Display within 30. Furthermore, the storage unit 205 stores the measured value data Dw and the like transmitted from the measurement unit 201 in the same manner as the storage unit 15 of the waveform display device 2 in the measurement system 100 described above.

In this measuring device 200, each process by the measuring device 1 and each process by the waveform display device 2 in the measuring system 100 are executed in the same procedure as the example described above. Therefore, according to this measuring apparatus 200, similarly to the measuring system 100, when the singular point itself to be displayed in association with the cursor displays 31 and 31a can be specified accurately, the cursor can be made to correspond to the singular point. Of course, the displays 31 and 31a can be displayed, and even if an arbitrary position in the vicinity of the singular point to be displayed corresponding to the cursor displays 31 and 31a is designated as the "designated position", the "designated position" can be displayed. A singular point within a circular "search range" having a predetermined width centered on is automatically searched, and cursor indications 31 and 31a are automatically displayed at positions corresponding to the singular point. Therefore, even a person unfamiliar with the operation of this type of device can reliably and easily display the cursor displays 31 and 31a at positions for designating arbitrary singular points.

100 measurement system 1,200 measurement device 2 waveform display device 11 communication unit 12,202 operation unit 13,203 display unit 14,204 processing unit 15,205 storage unit 20 display condition setting screen 30 waveform display screen 31, 31a cursor display 32 Search range display 201 Measurement part Dp Program data Dw Measured value data P0 to P3, Pa1 to Pa7 Position Pb1 to Pb3, Pb4a, Pb4b, Pb5 to Pb7 Singular point W1 to W6 Signal waveform

Claims (5)

A waveform display device comprising a processing unit for displaying a signal waveform based on waveform data on a waveform display screen and for displaying a cursor display for designating an arbitrary point in the signal waveform on the waveform display screen together with the signal waveform. There is
a pointing device capable of specifying an arbitrary position within the waveform display screen,
When the position specifying operation is performed by the pointing device while the signal waveform is being displayed on the waveform display screen, the processing unit is configured to set the position specified by the position specifying operation as a center in advance. Specifying a circular search range with a defined width, and defining in advance with the position of the singular point as a reference when a singular point that satisfies a pre-defined condition in the signal waveform exists within the search range a waveform display device for displaying the cursor display at the selected display position. 2. The waveform display device according to claim 1, wherein said processing unit identifies said search range centering on the position designated by said pointing device at the end of said position designation operation. 2. The waveform display device according to claim 1, wherein the processing unit specifies the search range around the position specified by the pointing device at the start of the position specifying operation. 4. The waveform display device according to any one of claims 1 to 3, wherein the processing unit causes a search range display indicating the predetermined search range to be displayed on the waveform display screen when the position designation operation is performed. The processing unit of the waveform display device displays a signal waveform based on the waveform data on the waveform display screen, and displays a cursor display for specifying an arbitrary point in the signal waveform on the waveform display screen together with the signal waveform. A waveform display program to be executed by
When a position specifying operation is performed to specify an arbitrary position in the waveform display screen with a pointing device while the signal waveform is displayed in the waveform display screen, the position specified by the position specifying operation A circular search range with a predetermined width centered on is specified, and when a singular point satisfying a predetermined condition in the signal waveform exists within the search range, the position of the singular point is determined A waveform display program for causing the processing unit to execute processing for displaying the cursor display at a predetermined reference display position.

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