JP5826060B2 - Vibration measuring apparatus and method - Google Patents

Description

  The present invention relates to a vibration measuring apparatus and method.

  Conventionally, vibration measurement devices that measure physical quantities such as noise and vibrations display a huge amount of measured data in a memory while displaying them on a display device, or informing the user of the result of comparison with a reference value. ing.

As such an apparatus, even when data is acquired for a long time, the amount of data does not become enormous, and detailed data can be acquired for events that occur during the measurement period. Patent Document 1 that provides a data acquisition device is known.
The data acquisition device disclosed in Patent Document 1 samples an input signal at a high speed and stores the latest data of the input signal in order of passage of time in a memory having an area for storing the input signal for a certain period. The input signal data is read at a predetermined interval and stored in the memory as current data, and the data stored in the memory area is held as event data based on a preset trigger condition. A first display area for displaying the entire waveform of the input signal based on the data and a second display area for displaying a part of the waveform of the input signal based on the event data are provided.

JP 2007-24838 A

  However, in Patent Document 1, for example, the trigger condition is a certain period or until the next trigger signal is generated. In the case of such a trigger condition, for example, when measured physical quantities are compared as waveforms, even waveforms having different rising and falling waveforms are stored as event data. In order to distinguish data with different waveforms, it is necessary to set trigger conditions in more detail. However, only certain phenomena indicated by a specific waveform are detected from data with different noise levels and vibration levels for each measurement target. As described above, it is not easy to set a trigger condition or the like.

  Therefore, there is a need for an apparatus and method that can provide a user with a setting environment that can easily detect only certain phenomena in noise and vibration measurement.

  It is an object of the present invention to provide a vibration measuring apparatus and method that can provide a user with a setting environment that can easily detect only a certain phenomenon in noise and vibration measurement.

The present invention provides the following solutions.
(1) A vibration measuring device that measures vibration, and includes a trigger level storage unit that stores a trigger level that is a vibration level serving as a trigger for detecting a specific vibration, and a pattern for detecting the specific vibration. A trend storage means for storing trend data which is a pattern representing vibration levels in time series, a measurement means for measuring vibration levels in time series, and vibration levels measured by the measurement means in time series order. Measurement data storage control means for storing in the measurement data storage means, display means for displaying an image, display control means for performing control for displaying measurement data measured by the measurement means on the display means, and the display An image displayed on the display means by the control means and at a point forming a measurement data image corresponding to the measurement data Among them, a point designation receiving unit that receives designation of a specific point, a trigger level storage control unit that stores a trigger level that is a value of the measurement data corresponding to the point received by the point designation receiving unit in the trigger level storage unit, , A range specification accepting unit for accepting designation of a partial range in the measurement data image, and trend data for storing trend data as the measurement data corresponding to the partial range accepted by the range designation accepting unit in the trend storage unit Vibration detection means for detecting specific vibration from the measurement data based on storage control means, the trigger level stored in the trigger level storage means, and the trend data stored in the trend storage means; A vibration measuring device comprising:

  According to the configuration of (1), the vibration measuring device according to the present invention stores the measured vibration levels in the measurement data storage means in time series order, and specifies the points that form the measurement data image displayed on the display means. The trigger level, which is the value of the measurement data corresponding to the received point, is stored in the trigger level storage means, and the specification of the partial range in the measurement data image is received and corresponds to the received partial range. Trend data, which is measurement data to be measured, is stored in the trend storage means, and specific vibration is detected from the measurement data based on the trigger level and the trend data.

  Therefore, the vibration measuring apparatus according to the present invention can set the trigger level and the trend data via the displayed measurement data image, so that only certain phenomena can be easily detected in the measurement of noise and vibration. A simple setting environment can be provided to the user.

  (2) A method executed by the vibration measurement apparatus according to (1), wherein the measurement unit measures a vibration level in a time series, and the measurement data storage control unit includes the measurement step. A measurement data storage control step for storing measured vibration levels in the measurement data storage means in chronological order, and a display for controlling the display control means to display the measurement data measured in the measurement step on the display means A control step, and the point designation accepting unit accepts designation of a specific point among the points displayed on the display unit by the display control step and forming a measurement data image corresponding to the measurement data The designation receiving step and the trigger level storage control means receive the point designation receiving step. A trigger level storage control step for storing a trigger level, which is a value of the measurement data corresponding to a digit, in the trigger level storage means; and the range designation receiving means accepts designation of a partial range of the measurement data image. A range specification receiving step; and a trend data storage control step for causing the trend storage means to store trend data that is the measurement data corresponding to the partial range received by the range specification receiving step; A vibration detecting step for detecting a specific vibration from the measurement data based on the trigger level stored in the trigger level storage unit and the trend data stored in the trend storage unit; A method comprising:

  Therefore, the method according to the present invention can set the trigger level and the trend data via the displayed measurement data image in the measurement of noise and vibration, so that only a certain phenomenon can be easily detected. An environment can be provided to the user.

  According to the present invention, it is possible to provide a user with a setting environment that can easily detect only a certain phenomenon in measurement of noise and vibration. In addition, according to the present invention, it is possible to display a trend on a display while measuring a noise level and a vibration level, and to set a point where a trigger is to be set while confirming a phenomenon in real time from the displayed trend. Furthermore, the pattern before and after the trigger can be determined and set from the data before and after.

It is a block diagram which shows the function structure of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows trigger level DB of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows trend DB of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows measurement data DB of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows the example of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows that measurement data are displayed on the display apparatus of the vibration measuring device which is one Embodiment of this invention. It is a figure which shows that the vibration measuring device which is one Embodiment of this invention has received designation | designated of the point, and designation | designated of the range via the measurement data image displayed on the display apparatus. It is a flowchart which shows the processing content of the vibration measuring device which concerns on one Embodiment of this invention. It is a figure for demonstrating the example which the vibration measuring device which concerns on one Embodiment of this invention detects a specific sound. It is a figure for demonstrating the example which the vibration measuring device which concerns on one Embodiment of this invention detects another specific sound. It is a figure which shows an example of the hardware constitutions of the vibration measuring device which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a functional configuration of a vibration measuring apparatus 30 according to an embodiment of the present invention. FIG. 2 is a diagram showing the trigger level DB 51 of the vibration measuring device 30 according to the embodiment of the present invention. FIG. 3 is a diagram showing the trend DB 52 of the vibration measuring apparatus 30 according to the embodiment of the present invention. FIG. 4 is a diagram showing the measurement data DB 53 of the vibration measuring device 30 according to the embodiment of the present invention. FIG. 5 is a diagram illustrating an example of a vibration measuring device 30 according to an embodiment of the present invention. FIG. 6 is a diagram showing that measurement data is displayed on the display device 508 of the vibration measuring device 30 according to the embodiment of the present invention. FIG. 7 is a diagram illustrating that the vibration measurement device 30 according to the embodiment of the present invention accepts designation of a point and designation of a range via a measurement data image displayed on the display device 508. 1 will be described with reference to these drawings.

  The vibration measuring device 30 includes a trigger level DB 51, a trend DB 52, a measurement data DB 53, a measurement unit 31, a measurement data storage control unit 32, a display control unit 33, a point designation receiving unit 34, and a trigger level storage control. A unit 35, a range designation receiving unit 36, a trend data storage control unit 37, and a vibration detection unit 38. As shown in FIG. 5, the vibration measurement device 30 includes a display device 508 and an operation unit 509. Hereinafter, each part is explained in full detail.

  The trigger level DB 51 stores a trigger level that is a vibration level serving as a trigger for detecting a specific vibration.

  The trend DB 52 stores trend data, which is a pattern for detecting a specific vibration and representing vibration levels in time series.

The measuring unit 31 measures the vibration level in time series. Specifically, the measurement unit 11 detects a voltage signal proportional to the acceleration of vibration by the vibration pickup, generates an analog vibration acceleration signal, and, for example, 24 bits per sample by the A / D converter. Convert to digital vibration acceleration data (unit: m / s ² ). Next, the measurement unit 11 performs an effective value calculation process on the vibration acceleration data, and obtains a ratio between the obtained effective value and a reference acceleration (for example, 10 ⁻⁵ m / s ^{2 in} the case of JIS) and leveled the vibration level. Data (unit: dB) is generated.

  The measurement data storage control unit 32 stores the vibration levels measured by the measurement unit 31 in the measurement data DB 53 in chronological order. Specifically, the measurement data storage control unit 32 creates a measurement data DB 53 as shown in FIG. As shown in FIG. 4, the measurement data DB 53 stores relative measurement times and generated level values in association with each other. Further, the measurement data DB 53 stores a difference calculated by a vibration detection unit 38 described later.

  The display device 508 displays an image. Specifically, the display device 508 is a display device such as a liquid crystal display device. For example, in the case of a high-performance sound level meter, it is a 3.5-inch liquid crystal display with a white backlight.

  The display control unit 33 performs control for displaying the measurement data measured by the measurement unit on the display device 508. Specifically, as shown in FIG. 6, the display control unit 33 causes the display device 508 to display the measurement data such that the horizontal axis is time and the vertical axis is the vibration level value.

  The point designation accepting unit 34 accepts designation of a specific point among points that are images displayed on the display unit by the display control unit 33 and form a measurement data image corresponding to the measurement data. Specifically, as shown in FIG. 7, the user operates the corresponding keys of the operation unit 509 to move the level cursor 221 and the time cursor 222, and the level cursor 221 and the time cursor 222 are moved to specific points. And the point designation accepting unit 34 accepts the point as the designated point.

  The trigger level storage control unit 35 causes the trigger level DB 51 to store a trigger level that is a value of measurement data corresponding to the point received by the point designation receiving unit 34. Specifically, the trigger level storage control unit 35 determines whether the value of the point received by the point designation receiving unit 34 is a rising point or a falling point based on a change in values before and after in the measurement data. Then, as shown in FIG. 2, the measured value of the designated point is stored in association with the information on the rising point or the falling point.

  The range designation accepting unit 36 accepts designation of a partial range in the measurement data image. Specifically, as shown in FIG. 7, the user operates the corresponding keys of the operation unit 509 to move the level cursor 221 and the time cursor 222, and the level cursor 221 and the time cursor 222 are used as starting points. And the corresponding key on the operation unit 509 is pressed, and then the level cursor 221 and the time cursor 222 are similarly moved, and the intersection of the level cursor 221 and the time cursor 222 is set as the end point. If the corresponding keys of the operation unit 509 are pressed and designated, the range designation accepting unit 36 accepts the range between the start point and the end point as the designated range.

  The trend data storage control unit 37 stores trend data, which is measurement data corresponding to the partial range received by the range designation receiving unit 36, in the trend DB 52. Specifically, the trend data storage control unit 37 determines whether the measurement data in the range received by the range designation reception unit 36 is a rising pattern or a falling pattern based on a change in the measurement value within the range. As shown in FIG. 3, the measured value within the range is stored in association with the information of the rising pattern or the falling pattern. Further, the trend data storage control unit 37 may store the measurement value in the range in association with the information on the pattern of the convex portion and the pattern of the concave portion, based on the change in the measurement value in the range.

  The vibration detection unit 38 detects a specific vibration from the measurement data based on the trigger level stored in the trigger level DB 51 and the trend data stored in the trend DB 52. Specifically, the vibration detection unit 38 determines the trigger level when the difference between the measurement data and the trigger level is within a predetermined range, compares the measurement data with the trend data, The difference from the trend data is evaluated to determine whether or not the measurement pattern and the trend data pattern match. When it is determined that they match, the measurement pattern is detected as a specific vibration. For example, the vibration detection unit 38 may determine that they match if each difference is within a certain threshold value, or may determine that they match if the average value of each difference is within a certain threshold value. .

Furthermore, the vibration detection unit 38 may detect a specific vibration by detecting a rising point and detecting a rising pattern at the rising point in comparison with trend data. Similarly, the vibration detection unit 38 detects a falling point and detects a specific vibration by detecting a falling pattern compared with the trend data at the falling point, or detects a rising point and a falling point. A specific vibration may be detected by detection.
The rising point and the falling point are compared between the vibration level measured by the measuring unit 31 and the trigger level stored in the trigger level DB 51, and the measured vibration level is changed from a level lower than the trigger level to a higher level. It is detected depending on whether or not.

  When detecting a specific vibration, the vibration detection unit 38 may output a message or a sound indicating the detection.

  FIG. 8 is a flowchart showing the processing contents of the vibration measuring apparatus 30 according to the embodiment of the present invention.

  In step S <b> 11, the vibration measurement device 30 (measurement unit 31, measurement data storage control unit 32) measures vibration and stores the measurement data in the measurement data DB 53. Thereafter, the vibration measuring device 30 moves the process to step S12.

  In step S12, the vibration measurement device 30 (display control unit 33, vibration detection unit 38) displays measurement data and performs processing for detecting specific vibrations. Thereafter, the vibration measuring device 30 moves the process to step S13.

  In step S <b> 13, the vibration measurement device 30 (display control unit 33) determines whether display stop has been instructed. More specifically, the vibration measuring device 30 determines whether a key corresponding to the display stop of the operation unit 509 has been pressed. If this determination is YES, the vibration measurement device 30 moves the process to step S14, and if this determination is NO, the vibration measurement device 30 moves the process to step S11.

  In step S <b> 14, the vibration measurement device 30 (display control unit 33) determines whether enlargement display is instructed. More specifically, the vibration measurement device 30 determines whether a key corresponding to the enlarged display of the operation unit 509 has been pressed. If this determination is YES, the vibration measurement device 30 moves the process to step S18, and if this determination is NO, the vibration measurement device 30 moves the process to step S15.

  In step S15, the vibration measuring device 30 (display control unit 33) determines whether or not a point has been designated. More specifically, the vibration measuring device 30 determines whether or not a key corresponding to the point designation of the operation unit 509 has been pressed. If this determination is YES, the vibration measurement device 30 moves the process to step S19, and if this determination is NO, the vibration measurement device 30 moves the process to step S16.

  In step S <b> 16, the vibration measurement device 30 (display control unit 33) determines whether a range has been specified. More specifically, the vibration measuring device 30 determines whether or not a key corresponding to the range designation of the operation unit 509 has been pressed. When this determination is YES, the vibration measurement device 30 moves the process to step S20, and when this determination is NO, the vibration measurement device 30 moves the process to step S17.

  In step S <b> 17, the vibration measuring device 30 (display control unit 33) determines whether display resumption is designated. More specifically, the vibration measurement device 30 determines whether or not a key corresponding to the display resumption designation of the operation unit 509 has been pressed. If this determination is YES, the vibration measurement device 30 moves the process to step S11, and if this determination is NO, the vibration measurement device 30 moves the process to step S14.

  In step S18, the vibration measuring device 30 (display control unit 33) enlarges the display of measurement data. Thereafter, the vibration measuring device 30 moves the process to step S17.

  In step S <b> 19, the vibration measuring device 30 (point designation receiving unit 34, trigger level storage control unit 35) stores the designated point in the trigger level DB 51. More specifically, the vibration measuring apparatus 30 receives a key corresponding to the cursor movement of the operation unit 509, moves the cursors 221 and 222, and receives and receives a key corresponding to the point designation of the operation unit 509. Judgment is made based on changes in the value of the point before and after in the measurement data to determine whether the point is a rising point or a falling point, and the specified point is measured in association with the information about the rising point or the falling point. The value is stored in the trigger level DB 51. Thereafter, the vibration measuring device 30 moves the process to step S17.

  In step S <b> 20, the vibration measurement device 30 (the range designation receiving unit 36 and the trend data storage control unit 37) stores the designated range in the trend DB 52. More specifically, the vibration measurement device 30 receives a key corresponding to the cursor movement of the operation unit 509, moves the cursors 221 and 222, and receives a key corresponding to the start point designation of the operation unit 509, Next, similarly, the cursors 221 and 222 are moved, a key corresponding to the end point designation of the operation unit 509 is accepted, the range between the start point and the end point is accepted as the designated range, From the change in the measured value, it is determined whether the pattern is a rising pattern or a falling pattern, and the measured value within the range is stored in the trend DB 52 in association with the information of the rising pattern or the falling pattern. . Thereafter, the vibration measuring device 30 moves the process to step S17.

  FIG. 9 is a diagram for explaining an example in which the vibration measurement device 30 according to an embodiment of the present invention detects a specific sound. FIG. 9 (1) is a diagram showing a sound waveform. FIG. 9B is a diagram showing a waveform when the vibration measuring device 30 measures the sound shown in FIG. If there is a sound as shown in FIG. 9 (1), if a sound with a trigger level 101 or higher is detected, both the sound 201 and the sound 202 are detected, but the value of the trigger level 101 is stored in the trigger level DB 51, When the trend data 301 is stored in the trend DB 52, the vibration measuring device 30 can detect only the sound 202 by comparing the trend data 301 after detecting the rising point 401.

  FIG. 10 is a diagram for explaining an example in which the vibration measurement device 30 according to an embodiment of the present invention detects another specific sound. FIG. 10A is a diagram illustrating a sound waveform. FIG. 10B is a diagram showing a waveform when the vibration measuring device 30 measures the sound shown in FIG. The values of the rising trigger level 111 and the falling trigger level 112 are stored in the trigger level DB 51, and the trend data 311 at the rising point and the trend data 312 at the falling point are stored in the trend DB 52. The measuring device 30 can detect only the sound 211 by comparing with the trend data 311 at the rising point 411 and comparing with the trend data 312 at the falling point 412.

  FIG. 11 is a diagram illustrating an example of a hardware configuration of the vibration measurement device 30 according to an embodiment of the present invention.

  The vibration measuring device 30 detects a sound signal with the microphone 501, converts it into a voltage with the preamplifier 502, generates an analog sound pressure signal, and generates digital sound pressure data (unit: Pa) with the A / D converter 503. ). For example, the A / D converter 503 performs sampling at a cycle of 64 kHz that is a predetermined sampling frequency, and converts it into 24-bit digital sound pressure data (unit: Pa) for each sample. A DSP (Digital Signal Processor) 504 performs an effective value calculation process to obtain an effective value from digital sound pressure data, and obtains a ratio between the obtained effective value and a reference sound pressure (20 μPa) to obtain a level of sound pressure level ( Data of unit: dB) is generated. Next, the DSP 504 executes a process (for example, the process shown in FIG. 8) for comparing the generated sound pressure level data with the default value of the trigger level stored in the RAM 506, the default value of the trend data, and the like. And a specific pattern is detected. A CPU (Central Processing Unit) 505 displays a comparison result on the display device 508 based on the detection of the DSP. The display device 508 performs various messages (for example, a message indicating that a specific waveform has been detected), waveform display of measured data, and the like. The operation unit 507 inputs various data (for example, a trigger level setting value) and an instruction for detection (for example, a rising point is detected as a detection condition, a rising point is detected, and Accepting that a falling point has been detected. The operation unit 507 accepts an operation for designating a trigger level and a trend data range from the measured data. The CPU 505 stores the trigger level and the trend data range accepted by the operation unit 507 in the RAM 506. A trigger level DB 51 and a trend DB 52 are generated (the process shown in FIG. 8).

  According to the present embodiment, the vibration measuring device 30 stores the measured vibration levels in the measurement data DB 53 in chronological order, and designates a specific point among the points forming the measurement data image displayed on the display device 508. The trigger level, which is the value of the measurement data corresponding to the received and received point, is stored in the trigger level DB 51, and the designation of the partial range of the measurement data image is received, and the trend is the measurement data corresponding to the received partial range. Data is stored in the trend DB 52, and specific vibration is detected from the measurement data based on the trigger level and the trend data. Therefore, the vibration measuring device 30 can provide the user with a setting environment that can easily detect only certain phenomena in the measurement of noise and vibration.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

DESCRIPTION OF SYMBOLS 30 Vibration measuring device 31 Measurement part 32 Measurement data storage control part 33 Display control part 34 Point designation | designated reception part 35 Trigger level memory | storage control part 36 Range designation | designated reception part 37 Trend data storage control part 38 Vibration detection part 51 Trigger level DB
52 Trend DB
53 Measurement data DB
508 Display device 509 Operation unit

Claims (2)

A vibration measuring device for measuring vibration,
Trigger level storage means for storing a trigger level which is a vibration level serving as a trigger for detecting a specific vibration;
Trend storage means for storing trend data which is a pattern for detecting the specific vibration and is a pattern representing vibration levels in time series;
Measuring means for measuring the vibration level in time series;
Measurement data storage control means for storing the vibration levels measured by the measurement means in the measurement data storage means in chronological order;
Display means for displaying an image;
Display control means for performing control for displaying measurement data measured by the measurement means on the display means;
Point designation accepting means for accepting designation of a specific point among points forming the measurement data image corresponding to the measurement data, which is an image displayed on the display means by the display control means;
Trigger level storage control means for storing in the trigger level storage means a trigger level that is the value of the measurement data corresponding to the point received by the point designation receiving means;
Range designation accepting means for accepting designation of a partial range in the measurement data image;
Trend data storage control means for storing trend data, which is the measurement data corresponding to the partial range received by the range designation receiving means, in the trend storage means;
Vibration detection means for detecting a specific vibration from the measurement data based on the trigger level stored in the trigger level storage means and the trend data stored in the trend storage means;
A vibration measuring device comprising: A method performed by the vibration measurement device according to claim 1,
The measuring means measures the vibration level in time series; and
The measurement data storage control means stores the vibration level measured in the measurement step in the measurement data storage means in time series order; and
A display control step for controlling the display control means to display the measurement data measured in the measurement step on the display means;
A point designation accepting step for accepting designation of a specific point among points forming the measurement data image corresponding to the measurement data, the point designation accepting means being an image displayed on the display means by the display control step; ,
A trigger level storage control step in which the trigger level storage control means stores in the trigger level storage means a trigger level that is a value of the measurement data corresponding to the point received by the point designation reception step;
A range designation accepting step in which the range designation accepting unit accepts designation of a partial range of the measurement data image;
A trend data storage control step in which the trend data storage control means stores the trend data as the measurement data corresponding to the partial range received in the range designation reception step in the trend storage means;
A vibration detecting step in which the vibration detecting means detects a specific vibration from the measurement data based on the trigger level stored in the trigger level storing means and the trend data stored in the trend storing means; ,
A method comprising:

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