JP2005189063A - Waveform-determining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely perform waveform determination for the signal waveform of an input signal having sufficiently long time interval. <P>SOLUTION: This device comprises a control part, displaying a signal waveform and a determination area (any one of A1-A6) for the signal waveform, and executing a waveform determination for whether the signal waveform is out of the determination area; and a RAM 6, having memory areas Ww1-Mw6 and storage area data Da1-Da6. The control part divides the waveform data into block data Db1-Db6 with the portion of a predetermined time as one unit, and stores the block data Db1-Db6 in the memory areas Mw1-Mw6, respectively. The control part thereafter reads at least one of the block data Db1-Db6 from the RAM 6 to display a signal waveform based on the waveform data, reads at least one of the area data Da1-Da6 from the RAM 6, and displays at least one of the determination areas A1-A6, based on the area data to execute the waveform determination. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention displays at least a signal waveform of an input signal on a display screen, determines whether or not the signal waveform is out of the determination area, and determines whether or not the signal waveform is included in the determination area. The present invention relates to a waveform determination apparatus that executes one of them.

As this type of waveform determination apparatus, a waveform determination apparatus disclosed in Japanese Patent Application Laid-Open No. 6-249682 is known. This waveform determination apparatus includes a CPU, an A / D conversion circuit that converts a signal waveform (determined waveform) of an input signal into digital waveform data, a ROM that stores a control program, and determined waveform data A display for displaying a determination area (determination waveform), a V-RAM for storing waveform data on a display screen of the display, and an operation unit, and operating the operation unit Thus, the determination area and the signal waveform of the input signal are displayed on the display. In this case, the data of the determination area displayed on the display screen is held in the V-RAM.
JP-A-6-249682 (page 2-3)

  However, the conventional waveform determination apparatus has the following problems. In other words, in this waveform determination apparatus, data of the determination area displayed on the display screen of the display is held in the V-RAM. The data of the determination area is created in correspondence with the signal waveform of the input signal displayed on the display screen of the display. For this reason, in this waveform determination apparatus, for example, when the waveform data of the input signal is increased and the entire signal waveform cannot be displayed in the display screen of the display as it is when the input signal is for a long time, A method is adopted in which a signal waveform is displayed at the time when waveform data for a time is input, and waveform determination for determining the waveform of the signal waveform is repeatedly executed. However, since a predetermined processing time is required for waveform determination, this processing time may become a dead time and waveform loss may occur. Therefore, this waveform determination device has a problem that it may be difficult to perform accurate waveform determination when an input signal is for a long time. In this case, the method of compressing the waveform data to the amount of data that can display the signal waveform of the input signal in the display screen, and the signal waveform of the input signal in the display screen by delaying the sampling period of the A / D conversion circuit in advance. It is necessary to adopt one of methods for suppressing the amount of data that can be displayed. However, in the former method, since the waveform is crushed in the time axis (horizontal axis) direction, it is difficult to display a subtle change in the signal waveform. On the other hand, in the latter method, there is a possibility that the sudden change that occurs in the signal waveform of the input signal may be missed as a result of a decrease in resolution in the time axis direction. Therefore, it is difficult to adopt these methods.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a waveform determination apparatus that can accurately perform waveform determination on a signal waveform of an input signal having a sufficiently long time length.

  In order to achieve the above object, the waveform determination apparatus according to claim 1 displays a signal waveform based on waveform data obtained by converting an input signal into data and a determination area for the signal waveform on the display screen of the display unit. A waveform determination apparatus including a control unit that executes at least one of waveform determination on whether or not the signal waveform deviates from and waveform determination on whether or not the signal waveform is included in the determination area, A plurality of storage areas for storing the waveform data, and a storage unit for storing each area data for the plurality of determination areas, wherein the control unit converts the waveform data into block data having a predetermined time as one unit. After making each block and storing each block data in each storage area, at least one block data is read from the storage unit. The signal waveform based on the waveform data is displayed on the display screen, the area data is read from the storage unit, and the determination area based on the area data is displayed on the display screen to determine the at least one waveform. Execute.

  The waveform determination device according to claim 2 is the waveform determination device according to claim 1, wherein the control unit blocks the waveform data so that the waveform data in each block data is temporally continuous. To do.

  The waveform determination apparatus according to claim 3 is the waveform determination apparatus according to claim 1, wherein the control unit is configured to perform the predetermined time from the time when the input signal satisfies a predetermined trigger condition each time the input signal satisfies the predetermined trigger condition. Minute waveform data is divided into block data.

  According to a fourth aspect of the present invention, in the waveform determination device according to any one of the first to third aspects of the present invention, the waveform determination device includes an operation unit capable of performing a selection operation on the at least one block data. The waveform determination is executed by displaying the signal waveform based on the waveform data of the selected block data on the display screen.

  According to a fifth aspect of the present invention, there is provided the waveform determination device according to any one of the first to fourth aspects, wherein the operation unit can perform a selection operation for selecting at least one of the determination areas. Then, the control unit displays the selected determination area on the display screen and executes the waveform determination.

  Moreover, the waveform determination apparatus according to claim 6 is the waveform determination apparatus according to any one of claims 1 to 5, wherein the control unit applies each of the signal waveforms based on the waveform data of the plurality of block data. The waveform determination is performed on the input signal, and the pass / fail determination on the input signal is performed based on the determination result of each waveform determination.

  In the waveform determination apparatus according to the first aspect, the control unit performs waveform determination after making the waveform data into block data and storing each block data in each storage area. For this reason, even if the input signal is for a long time, all of the waveform data to be determined can be stored in the storage unit as block data, and waveform determination is subsequently performed based on the stored block data Can do. Therefore, unlike conventional waveform determination devices that perform waveform determination when waveform data for a predetermined time is input, it is possible to reliably prevent the occurrence of waveform loss due to the dead time of waveform determination processing. As a result, it is possible to accurately perform waveform determination for an input signal having a sufficiently long time length.

  In the waveform determination apparatus according to the second aspect, the control unit blocks the waveform data in each block data so as to be continuous in time. Therefore, for example, by displaying each signal waveform continuously based on each block data, it is possible to easily grasp the state of the entire waveform of the input signal.

  According to another aspect of the waveform determination apparatus of the present invention, the control unit blocks the waveform data for a predetermined time from the time (trigger point) when the trigger condition is satisfied every time the input signal satisfies the predetermined trigger condition. For this reason, for example, even when performing waveform determination for a signal that is repeatedly output irregularly for a long time, the waveform data can be reliably stored in the storage unit each time a trigger point arrives. Therefore, for example, unlike a configuration in which waveform determination is performed every time a trigger point arrives, the waveform determination processing time becomes a dead time, and a situation in which waveform loss occurs can be reliably prevented. It is possible to accurately perform waveform determination for an input signal that is repeatedly output periodically and has a sufficiently long time length.

  According to another aspect of the waveform determination apparatus of the present invention, an operation unit capable of selecting at least one block data is provided, and the control unit displays a signal waveform based on the waveform data of the selected block data on the display screen. To execute waveform judgment. For this reason, it is possible to arbitrarily select block data and perform waveform determination only on the signal waveform. Therefore, for example, in a device that enters a steady state after a predetermined time has elapsed from the time of activation, it is possible to accurately and easily perform waveform determination only on an input signal in the steady state.

  The waveform determination apparatus according to claim 5 is configured such that the operation unit can perform a selection operation of selecting at least one of a plurality of determination areas, and the control unit displays the determination area selected on the display screen to generate a waveform. Make a decision. For this reason, since a determination area suitable for each signal waveform can be arbitrarily selected and used, for example, waveform determination can be accurately performed even for a signal waveform of an AC signal whose amplitude changes with time. Can do.

  In the waveform determination device according to claim 6, the control unit performs waveform determination on the signal waveform based on the waveform data of the plurality of block data, and accepts or rejects the input signal based on the determination result of each waveform determination. Make a decision. For this reason, the pass / fail judgment can be executed by arbitrarily defining the pass / fail judgment criteria.

  Hereinafter, a waveform determination apparatus according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the waveform determination device 1 will be described with reference to FIG.

  As shown in FIG. 1, the waveform determination apparatus 1 includes a measurement unit 2, a display unit 3, an operation unit 4, a control unit 5, a RAM 6, and a ROM 7. For example, the measurement unit 2 performs analog-digital conversion on the input signal S1 illustrated in FIG. 2 at a predetermined sampling period to generate waveform data Dw, and outputs the waveform data Dw to the control unit 5. The display unit 3 is configured by an LCD panel or a cathode ray tube (CRT). Under the control of the control unit 5, for example, as shown in FIG. 5, signal waveforms W1 to W6 (hereinafter referred to as “signal waveform W” when not distinguished). And the determination areas A1 to A6 (hereinafter also referred to as “determination area A” when not distinguished) are displayed on the display screen 11. The operation unit 4 includes, for example, a setting key for setting the recording time of the input signal, and a desired signal waveform W (at least one of each block data Db to be described later) among the signal waveforms W displayed on the display screen 11. A signal waveform selection key for selecting the signal waveform, and a determination area selection key for selecting the determination area A to be used when determining the waveform of the signal waveform W from each determination area A displayed on the display screen 11. Various operation keys (all not shown) are provided.

  The control unit 5 executes storage control for storing the waveform data Dw output from the measurement unit 2 in the RAM 6. In this case, as shown in FIG. 4, the control unit 5 uses the block data Db1, Db2,... With the waveform data Dw output from the measurement unit 2 as a unit of a predetermined time T1 (for example, 0.1 second). Block data Db (waveform data Dw) in the RAM 6 is formed into blocks continuously (so that each waveform data Dw in each block data Db is temporally continuous) (hereinafter also referred to as “block data Db” when not distinguished). ) For a plurality of memory areas (storage areas) Mw1, Mw2,. Further, the control unit 5 reads the block data Db stored in the RAM 6 in accordance with the key operation of the operation unit 4 and displays the signal waveform W based on the read block data Db together with the determination area A on the display unit 3. The control unit 5 also determines at least one of the waveform determination whether the signal waveform W displayed on the display unit 3 is out of the determination area A and the waveform determination whether the signal waveform W is included in the determination area A. Execute. Specifically, in this waveform determination device 1, a waveform indicating whether or not at least a part of the signal waveform W displayed on the display unit 3 is out of the determination area A according to the setting operation of the operation unit 4. Determination, waveform determination of whether or not all of signal waveform W is out of determination area A, waveform determination of whether or not at least part of signal waveform W is included in determination area A, and all of signal waveform W At least one of the waveform determinations as to whether or not is included in the determination area A. Hereinafter, as an example, an example will be described in which the control unit 5 performs waveform determination as to whether or not at least a part of the signal waveform W is out of the determination area A.

  The RAM 6 corresponds to a storage unit in the present invention, and as shown in FIG. 4, a plurality of storage areas for block data Db (in this example, the memory for storing block data Db1, Db2,. .. Area Mw1, Mw2,..., Hereinafter referred to as “memory area Mw” when not distinguished, and area data Da1, Da2,. .. (Hereinafter also referred to as “memory area Ma” when not distinguished from each other). In this case, the determination areas A1, A2,... Specified by the respective area data Da1, Da2,... Represent the signal waveform of the input signal S0 in the normal state with no noise as shown in FIG. The signal waveforms W1, W2,... Divided along the axis) every time T1 are defined in advance so as to be included in the range. The ROM 7 stores an operation program of the control unit 5 and the like.

  Next, the overall operation of the waveform determination apparatus 1 will be described.

  First, the recording time for recording the input signal to be determined (for example, the input signal S1 shown in FIG. 2) is set to, for example, 0.6 seconds by the key operation of the operation unit 4. Next, the control unit 5 is caused to execute recording of the input signal S1 by trigger measurement. At this time, the control unit 5 monitors the level of the waveform data Dw for the input signal S1 output from the measurement unit 2, and sets a predetermined trigger condition (for example, the level of the waveform data Dw is a predetermined setting). The waveform data Dw output from the time point when the value is crossed upward) to the time point when the set recording time elapses is a unit with a predetermined time T1 (for example, 0.1 second) as one unit. A storage process in which the data Db is blocked and stored in the memory area Mw of the RAM 6 is repeatedly executed. In this example, since the recording time is set to 0.6 seconds and the time T1 for dividing the waveform data Dw is defined to be 0.1 seconds as described above, the control unit 5 performs a total of six storage processes. Execute. As a result, as shown in FIG. 4, block data Db1 to Db6 are stored in the memory areas Mw1 to Mw6 of the RAM 6, respectively. In this case, prior to display of the signal waveform W and waveform determination, the control unit 5 blocks each block data Db so as to be temporally continuous and stores them in the RAM 6, so that waveform loss is reliably prevented. Regarding the setting of the recording time, a configuration in which a recording time (for example, a recording time of 0.1 seconds for each block) is set for each block may be employed. In this configuration, for example, when six memory areas Mw1 to Mw6 are formed in the RAM 6, waveform recording is performed six times in total with a recording time of 0.1 second for each block.

  Subsequently, the control unit 5 reads the block data Db1 to Db6 and the area data Da1 to Da6 from the RAM 6, and as shown in FIG. 5, the signal waveforms W1 to W6 and the area data Da1 based on the block data Db1 to Db6. Determination areas A1 to A6 based on ~ Da6 are displayed on the display screen 11 of the display unit 3. Next, the signal waveform selection key of the operation unit 4 is operated to select, for example, the second block (block corresponding to the signal waveform W2) as a waveform determination target. Next, the determination area selection key of the operation unit 4 is operated to select, for example, the determination area A2 as the determination area A for determining each block (in this example, the block corresponding to the signal waveform W2). Thereafter, the third to sixth blocks (blocks corresponding to the signal waveforms W3 to W6) are sequentially selected as waveform determination targets by operating the operation unit 4 in the same manner. Determination areas A3 to A6 are sequentially selected as determination areas A for determining the waveforms of the sixth to sixth waveforms, respectively.

  In response to this, the control unit 5 superimposes the signal waveform W2 corresponding to the second block and the determination area A2 on the display screen 11 of the display unit 3 and displays the signal waveform W2 as shown in FIG. Execute waveform judgment for. In this waveform determination process, the control unit 5 compares the waveform display data generated based on the waveform data Dw in the block data Db with the area display data generated based on the area data Da. It is determined whether or not the signal waveform W2 is out of the determination area A2. At this time, as shown in the figure, since the signal waveform W2 does not deviate from the determination area A2, the control unit 5 determines that the signal waveform W2 is good and stores the determination result in the RAM 6. Subsequently, as shown in FIG. 7, the control unit 5 superimposes the signal waveform W3 and the determination area A3 on the display screen 11 and performs waveform determination on the signal waveform W3. At this time, as shown in the figure, since a part of the signal waveform W3 is out of the range of the determination area A3, the control unit 5 determines that the signal waveform W3 is a waveform defect and stores the determination result in the RAM 6. Remember. Hereinafter, similarly, the control unit 5 performs waveform determination on each of the signal waveforms W4 to W6, for example, determines that each of the signal waveforms W4 to W6 is good, and stores the determination result in the RAM 6.

  Next, the control unit 5 determines pass / fail of the input signal S <b> 1 based on the determination result stored in the RAM 6. In this case, for example, when the pass / fail judgment criterion is defined so that the input signal S1 is “passed” when 4/5 or more of the judgment results in the waveform judgment are good, the control unit 5 controls the input signal S1. For example, “OK” indicating the determination result is displayed in the display screen 11. Thereby, the pass of the input signal S1 is notified.

  As described above, according to the waveform determination device 1, the control unit 5 blocks the waveform data Dw into block data Db having a predetermined time T1 as one unit and stores the block data Db in each memory area Mw of the RAM 6. By executing the waveform determination later, even if the input signal S1 is for a long time, all of the waveform data Dw to be determined can be stored in the RAM 6, and the waveform determination can be performed based on the stored waveform data Dw. Since it can be performed after that, unlike the conventional waveform determination device that performs waveform determination at the time when waveform data Dw for a predetermined time is input, the waveform determination processing time becomes a dead time and waveform loss occurs. As a result, the waveform determination for the input signal S1 having a sufficiently long time can be performed accurately. Further, the control unit 5 blocks the waveform data Dw in each block data Db so as to be continuous in time, thereby displaying each signal waveform W based on each block data Db in a continuous manner. The state of the entire waveform of the input signal S1 can be easily grasped.

  Further, the operation unit 4 is configured to enable a signal waveform selection operation for selecting at least one of the plurality of block data Db (that is, a plurality of signal waveforms W), and the control unit 5 selects the signal waveform selection operation. By displaying the signal waveform W thus displayed on the display screen 11 and executing waveform determination, for example, after storing the waveform data Dw (block data Db), the signal waveform W from a point in time when a predetermined time has elapsed is obtained. Waveform determination can be performed only on the signal waveform W selected arbitrarily. Therefore, for example, in a device that enters a steady state after a predetermined time has elapsed from the time of activation, it is possible to accurately and easily perform waveform determination only on the signal waveform of the input signal in the steady state.

  Further, the operation unit 4 is configured to enable a determination area selection operation for selecting at least one of the plurality of determination areas A, and the control unit 5 displays the determination area A selected by the determination area selection operation on the display screen 11. By performing waveform determination and displaying the waveform, it is possible to arbitrarily select and use a determination area A suitable for each signal waveform W. For example, the signal waveform of an AC signal whose amplitude changes over time Therefore, the waveform can be accurately determined.

  Further, the control unit 5 performs waveform determination on the signal waveform W (each block) based on the waveform data Dw of the plurality of block data Db and determines whether the input signal S1 is acceptable based on the determination result of each waveform determination. By executing the above, pass / fail judgment criteria can be arbitrarily defined and the pass / fail judgment can be executed.

  The present invention is not limited to the configuration described above. For example, although the example in which the recording time of the input signal S1 is set to 0.6 seconds (that is, the number of times of storage processing is 6) has been described above, the recording time is not limited to this and can be arbitrarily set. . In addition, the example in which the signal waveforms W2 to W6 among the signal waveforms W1 to W6 are selected as the waveform determination target has been described above. However, at least one of the signal waveforms W based on the recorded block data Db is described. The signal waveform W can be arbitrarily selected as a waveform determination target. Further, although an example in which the determination area A is selected using the operation unit 4 has been described above, a configuration in which each signal waveform W and each determination area A are associated with each other in a fixed manner may be employed.

  In the storage process, the control unit 5 described above is an example in which the waveform data Dw output from the measurement unit 2 is continuously blocked and stored in the RAM 6. However, every time the input signal satisfies the trigger condition, It is also possible to adopt a configuration in which the waveform data Dw for a predetermined time from the time when the trigger condition is satisfied is blocked into the block data Db and stored in the RAM 6. In this configuration, the operation unit 4 is operated by key operation, for example, a desired trigger condition (as an example, a condition that the level of the waveform data Dw crosses a predetermined set value upward), and a predetermined that blocks the waveform data Dw. The time T2 (see FIG. 8) is set. Next, for example, the input signal S2 shown in the figure is input, and the control unit 5 is caused to execute recording by trigger measurement. At this time, the control unit 5 monitors the level of the waveform data Dw for the input signal S2 output from the measurement unit 2, and when the input signal S2 satisfies the trigger condition as shown in FIG. The storage process of making the waveform data Dw for the time T2 from that point (trigger point) into block data Db and storing it in the memory area Mw of the RAM 6 is repeatedly executed every time the trigger point arrives. Thereby, the block data Db11 to Db16 shown in FIG. 8 are stored in the memory areas Mw of the RAM 6, respectively.

  Next, the control unit 5 displays the signal waveforms W11 to W16 based on the block data Db11 to Db16 and the determination areas A11 to A16 (see FIG. 8) for the input signal S2 on the display screen 11 of the display unit 3. Let Subsequently, when the block (signal waveform W) subject to waveform determination and the determination area A used for the block (for determining the signal waveform W of the block) are selected, the control unit 5 selects As shown in FIG. 9, the signal screen W of the selected block (for example, the signal waveform W13 shown in the figure) and the determination area A (for example, the determination area A13 shown in the figure) are overlapped to display the display screen of the display unit 3 11 and the waveform determination similar to the above is executed. Next, the control unit 5 determines pass / fail of the input signal S2 based on each determination result in the waveform determination.

  As described above, also in this configuration, the waveform data Dw for the determination target portion in the input signal S2 can be blocked and stored in the RAM 6, and the waveform determination is thereafter performed based on the stored block data Db. Can be implemented. Therefore, for example, even when waveform determination is performed for a signal that is repeatedly output irregularly for a long time, each block data Db11 to Db16 (waveform data Dw) is reliably stored in the RAM 6 each time a trigger point arrives. Can be memorized. Therefore, for example, unlike the configuration in which waveform determination is performed every time a trigger point arrives, the result of the waveform determination processing time being a dead time and the occurrence of waveform loss can be reliably prevented, for example, It is possible to accurately determine the waveform for the input signal S2 that is repeatedly output irregularly and has a sufficiently long time length.

1 is a block diagram illustrating a configuration of a waveform determination device 1. FIG. It is a wave form diagram which shows the signal waveform of input signal S1. It is explanatory drawing for demonstrating the relationship between the signal waveform of input signal S0, and each determination area A1-A6. 3 is an explanatory diagram for explaining each memory area of a RAM 6. FIG. It is a display screen figure of the display screen 11 which is displaying the signal waveforms W1-W6 and determination area A1-A6. It is a display screen figure of the display screen 11 which is displaying the signal waveform W2 and determination area A2. It is a display screen figure of the display screen 11 which is displaying the signal waveform W3 and determination area A3. It is explanatory drawing for demonstrating the relationship between the signal waveform of input signal S2, and each determination area A11-A16. It is a display screen figure of the display screen 11 which is displaying the signal waveform W13 and determination area A13.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waveform determination apparatus 2 Measuring part 3 Display part 5 Control part 6 RAM
11 Display screens A1 to A6, A11 to A16 Determination areas Da, Da1 to Da6 Area data Db, Db1 to Db6, Db11 to Db16 Block data Dw Waveform data Ma1 to Ma6, Mw1 to Mw6 Memory area S0, S1, S2 Input signal T1 , T2 Time W1-W6, W11-W16 Signal waveform

Claims (6)

Waveform determination and determination of whether or not the signal waveform is out of the determination area by displaying the signal waveform based on the waveform data obtained by converting the input signal into data and the determination area for the signal waveform on the display screen of the display unit A waveform determination apparatus including a control unit that executes at least one of waveform determinations as to whether or not the signal waveform is included in an area,
A plurality of storage areas for storing the waveform data and a storage unit for storing each area data for the plurality of determination areas;
The control unit blocks the waveform data into block data having a predetermined time as one unit and stores the block data in the storage areas, and then stores at least one block data from the storage unit. Read and display the signal waveform based on the waveform data on the display screen, read the area data from the storage unit, and display the determination area based on the area data on the display screen to determine the at least one waveform Waveform determination device for executing   The waveform determination device according to claim 1, wherein the control unit blocks the waveform data so that the waveform data in each block data is temporally continuous.   2. The waveform determination apparatus according to claim 1, wherein the control unit blocks the waveform data for the predetermined time from the time point when the input signal satisfies a predetermined trigger condition every time the input signal satisfies the predetermined trigger condition. An operation unit capable of performing a selection operation on the at least one block data;
4. The waveform determination device according to claim 1, wherein the control unit displays the signal waveform based on the waveform data of the selected block data on the display screen and executes the waveform determination. 5. The operation unit is configured to allow a selection operation to select at least one of the determination areas.
The waveform determination apparatus according to claim 1, wherein the control unit displays the selected determination area on the display screen and executes the waveform determination.   The control unit performs the waveform determination on each signal waveform based on the waveform data of a plurality of the block data, and performs a pass / fail determination on the input signal based on a determination result of each waveform determination The waveform determination apparatus according to claim 1.

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