JP5950616B2 - Vibration measuring apparatus and method - Google Patents

Description

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

  Conventionally, a vibration measurement device that measures physical quantities such as noise and vibration compares the measured physical quantity with a reference value, displays the comparison result on the display device, and the measured physical quantity exceeds the reference value. Tell users.

  As such an apparatus, for example, Patent Document 1 that discloses an abnormal sound monitoring apparatus that monitors abnormal sound of a plant is known. The abnormal sound monitoring device disclosed in Patent Document 1 stores an audible signal input from a plant device for each of a plurality of plants to be monitored, and monitors the abnormal sound of the plant device based on the stored audible signal. And detect the presence or absence of abnormality. Then, the abnormal sound monitoring device performs control so as not to store abnormal sound data input from the plant in which the abnormality is detected, excludes only the plant equipment that has detected the abnormality from the monitoring target, and monitors other plant equipment. Continue.

JP-A-4-30596

  However, the method of detecting a phenomenon by comparing the measured physical quantity with a reference value also detects a phenomenon that is not a detection target. For example, in such a method, when measured physical quantities are compared as waveforms, even if the waveforms have different ways of rising and falling, a phenomenon that is equal to or higher than a reference value is detected.

  Therefore, there is a need for an apparatus and method that can detect only certain phenomena in noise and vibration measurement.

  An object of the present invention is to provide a vibration measuring apparatus and method capable of detecting only certain phenomena 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. The measurement data storage control means to be stored in the measurement data storage means, the vibration level measured by the measurement means, and the trigger level stored in the trigger level storage means are compared, and the measured vibration level is Rising detection means for detecting a rising point from a level lower than the trigger level to a higher level; and Based on a detection condition for detecting a specific vibration, a detection control means for controlling whether or not to detect the specific vibration, and when the measurement is controlled by the detection control means, the measurement Based on the result of comparison by the comparison means for comparing the measurement pattern, which is a vibration level pattern stored in the data storage means in time series, with the trend data stored by the trend storage means A determination signal for determining whether or not the measurement pattern and the trend data match, and a match signal indicating that the measurement pattern and the trend data match when determined by the determination unit Output means, and the detection control means, when the detection condition is that the rising point is detected Controls to perform detection of the specific vibration by the rising point is detected by the rising detecting means, the vibration measurement device.

  According to the configuration of (1), the vibration measuring device according to the present invention detects the specific vibration and the trigger level storage means for storing the trigger level that is the vibration level serving as a trigger for detecting the specific vibration. A trend storage means for storing trend data, which is a pattern for displaying vibration levels in time series order, measures vibration levels in time series, and stores measured vibration levels in time series measurement data Memorize in means. Then, the vibration measuring device compares the measurement pattern stored in the measurement data storage means in time series order with the trend data and determines whether or not they coincide with each other when the rising point is detected. In this case, a coincidence signal indicating that the measurement pattern coincides with the trend data is output.

  Therefore, the vibration measuring apparatus according to the present invention detects the rising point, and compares the measurement data at the rising point with the trend data to detect a matching phenomenon, so that only a certain phenomenon is detected in the noise and vibration measurement. Can be detected.

  (2) The vibration level measured by the measurement unit is compared with the trigger level stored in the trigger level storage unit, and the measured vibration level is changed from a level higher than the trigger level to a lower level. A falling detection unit for detecting a falling point; and when the detection condition is that a falling point is detected, the detection control unit detects the falling point by the falling detection unit. The vibration measuring device according to (1), wherein the control is performed to detect the specific vibration.

  Therefore, the vibration measuring apparatus according to (2) detects the falling point, and compares the measurement data at the falling point with the trend data to detect a coincidence phenomenon. Only the phenomenon can be detected.

  (3) The detection control means detects the rising point by the rising detection means when the detection condition is to detect the rising point and to detect the falling point, and The vibration measuring device according to (2), wherein the specific vibration is controlled to be detected when the falling point is detected by the falling detection means.

  Therefore, the vibration measuring apparatus according to (3) detects the rising point and the falling point, and compares the measurement data and the trend data at each point to detect the coincidence phenomenon. In measurement, only certain phenomena can be detected.

  (4) A method executed by the vibration measurement device according to (1), wherein the measurement unit measures a vibration level in time series, and the measurement data storage control unit performs measurement according to the measurement step. A measurement data storage control step for storing the measured vibration levels in the measurement data storage means in chronological order, the vibration level measured by the detection means in the measurement step, and the trigger level stored in the trigger level storage means And a rising detection step for detecting a rising point at which the measured vibration level becomes higher from a level lower than the trigger level, and a detection for detecting the specific vibration by the detection control means A detection control step for controlling whether or not to detect the specific vibration based on a condition; Is a measurement pattern that is a vibration level pattern stored in time series in the measurement data storage means, and the trend data stored by the trend storage means when the detection control step controls the detection. A determination step for determining whether or not the measurement pattern matches the trend data based on a result of the comparison in the comparison step; and And an output step for outputting a coincidence signal indicating that the measurement pattern and the trend data coincide with each other when the decision step determines that they coincide with each other, and the detection control step includes a step in which the detection condition rises. If it is detected that a point has been detected, A method of performing control so that the specific vibration is detected when a rising point is detected.

  Therefore, the method according to (4) detects the rising point, detects the matching phenomenon by comparing the measured data and the trend data at the rising point, and therefore detects only certain phenomena in noise and vibration measurement. can do.

  According to the present invention, only certain phenomena can be detected in the measurement of noise and vibration. In addition, the present invention can measure intermittent noise and vibration synchronously at a set constant level.

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 for demonstrating the example which the vibration measuring device which concerns on one Embodiment of this invention detects a specific vibration. It is a figure for demonstrating the example which the vibration measuring device which concerns on one Embodiment of this invention detects another specific vibration. It is a flowchart which shows the main process of the vibration measuring device which concerns on one Embodiment of this invention. It is a flowchart which shows the rising trend detection process of the vibration measuring device which concerns on one Embodiment of this invention. It is a flowchart which shows the falling trend detection process of the vibration measuring device which concerns on one Embodiment of this invention. It is a figure which shows an example of the hardware constitutions of a sound level meter as a 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 10 according to an embodiment of the present invention. FIG. 2 is a diagram showing the trigger level DB 51 of the vibration measuring apparatus 10 according to the embodiment of the present invention. FIG. 3 is a diagram showing the trend DB 52 of the vibration measuring apparatus 10 according to the embodiment of the present invention. FIG. 4 is a diagram showing the measurement data DB 53 of the vibration measuring apparatus 10 according to the embodiment of the present invention. The vibration measurement apparatus 10 includes a measurement unit 11, a measurement data storage control unit 12, a rising detection unit 13, a falling detection unit 14, a detection control unit 15, a comparison unit 16, a determination unit 17, and an output unit. 18, a trigger level DB 51, a trend DB 52, and a measurement data DB 53. 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. Specifically, as shown in FIG. 2, the trigger level DB 51 stores level values indicating rising points and falling points.
For example, the trigger level DB 51 may store a point specified from time-series data measured by the vibration measuring device 10.

The trend DB 52 stores trend data, which is a pattern for detecting a specific vibration and representing vibration levels in time series. Specifically, as shown in FIG. 3, the trend DB 52 stores level values corresponding to relative measurement times. The flag stores, for example, information indicating a start point and an end point in trend data to be compared with measurement data. The rising pattern of the trend DB 52 is stored including a rising start point that is a comparison start point and a rising point. Similarly, the falling pattern is stored including a falling start point which is a comparison start point and a falling point.
For example, the trend DB 52 may store a specified range from time-series data measured by the vibration measuring device 10.

The measuring unit 11 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 12 stores the vibration levels measured by the measurement unit 11 in the measurement data DB 53 in chronological order. Specifically, the measurement data storage control unit 12 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. The measurement data DB 53 stores a difference calculated by the comparison unit 16 described later.

  The rise detection unit 13 compares the vibration level measured by the measurement unit 11 with the trigger level stored in the trigger level DB 51, and the rise in which the measured vibration level becomes higher from a level lower than the trigger level. Detect points. Specifically, the rising edge detection unit 13 compares the vibration level measured this time with the trigger level, the vibration level measured this time is equal to or higher than the trigger level, is measured last time, and is stored in the measurement data DB 53. When the vibration level is lower than the trigger level, the vibration level point measured this time is detected as the rising point.

  The falling detection unit 14 compares the vibration level measured by the measurement unit 11 with the trigger level stored in the trigger level DB 51, and the measured vibration level is changed from a level higher than the trigger level to a lower level. Detect falling point. Specifically, the falling detection unit 14 compares the vibration level measured this time with the trigger level, and the vibration level measured this time is equal to or lower than the trigger level, and is measured last time and stored in the measurement data DB 53. When the vibration level being detected is higher than the trigger level, the vibration level point measured this time is detected as the falling point.

  The detection control unit 15 controls whether or not to detect the specific vibration based on the detection condition for detecting the specific vibration. Specifically, when the detection condition is that a rising point is detected, the detection control unit 15 performs control so that a specific vibration is detected when the rising point is detected by the rising detection unit 13. In addition, when the detection condition is that a falling point is detected, the detection control unit 15 performs control so that a specific vibration is detected when the falling point is detected by the falling detection unit 14. Further, when the detection condition is that the rising point is detected and the falling point is detected, the detection control unit 15 detects the rising point by the rising detection unit 13 and the falling detection unit 14 Control is performed to detect a specific vibration when the falling point is detected by.

  The comparison unit 16, when controlled to detect by the detection control unit 15, obtains a measurement pattern that is a vibration level pattern stored in the measurement data DB 53 in chronological order and the trend data stored by the trend DB 52. Compare. Specifically, the comparison unit 16 compares the data in the trend data with the data corresponding to the measurement time of the trend data among the data stored in the measurement data DB 53, and calculates the difference. Then, the comparison unit 16 compares the number of pieces of trend data and calculates each difference. When trend data to be compared is stored in the trend DB 52 even after the rising point or the falling point, the comparison unit 16 measures the remaining trend data to be compared and the data measured by the measurement unit 11. You may compare each time. The comparison unit 16 may store the difference in the measurement data DB 53.

  The determination unit 17 determines whether or not the measurement pattern matches the trend data based on the result compared by the comparison unit 16. Specifically, the determination unit 17 evaluates the difference calculated by the comparison unit 16. For example, the determination unit 17 determines that they match when each difference is within a certain threshold. The determination part 17 is good also as determining with a match, when the average value of each difference is in a fixed threshold value.

  Each time the measurement unit 11 measures the vibration level data, the comparison unit 16 and the determination unit 17 compare the measurement data with the rising start point and the falling start point in the trend data of the trend DB 52. After each rising start point or falling start point is detected, the measured data is compared with the trend data corresponding to the rising pattern or falling pattern in the trend DB 52 to detect the rising point or falling point. In this case, it may be determined that a rising pattern or a falling pattern is detected.

  The output unit 18 outputs a coincidence signal indicating that the measurement pattern coincides with the trend data when it is determined by the determination unit 17 that they match. Specifically, the output unit 18 outputs a message, sound, or the like indicating that they match. Moreover, based on the coincidence signal output from the output unit 18, the display device or the audio output device may output a message or sound.

FIG. 5 is a diagram for explaining an example in which the vibration measurement apparatus 10 according to an embodiment of the present invention detects a specific vibration. FIG. 5A is a diagram illustrating a waveform of vibration. FIG. 5 (2) is a diagram showing a waveform when the vibration shown in FIG. 5 (1) is measured by the vibration measuring device 10. When there is a vibration as shown in FIG. 5A, if a vibration pattern with a trigger level 101 or higher is detected, both the vibration pattern 201 and the vibration pattern 202 are detected. By detecting the pattern and the falling pattern, only the vibration pattern 202 is detected.
Specifically, the rising point 401 and the falling point 402 are stored in the trigger level DB 51, and the rising trend data 301 (including the rising start point 401A) and the falling trend data 302 (including the rising start point 401A) are stored in the trend DB 52. Is stored), the vibration measuring apparatus 10 detects the rising start point 401A, compares it with the trend data 301, and detects the rising point 401 and at the same time indicates that the rising pattern is present. Similarly, after detecting the falling start point 402B, it is compared with the trend data 302, and at the same time as detecting the falling point 402, it is determined that it is a falling pattern, and only the vibration pattern 202 can be detected. . The detailed detection procedure of the vibration pattern is shown in flowcharts (FIGS. 7 to 9) described later.

FIG. 6 is a diagram for explaining an example in which the vibration measurement apparatus 10 according to an embodiment of the present invention detects another specific vibration. FIG. 6A is a diagram illustrating a waveform of vibration. FIG. 6 (2) is a diagram showing a waveform when the vibration shown in FIG. 6 (1) is measured by the vibration measuring device 10.
As in FIG. 5, when the value of the rising point 411 is stored in the trigger level DB 51 and the rising trend data 311 (including the rising start point 411A) is stored in the trend DB 52, the vibration measuring apparatus 10 starts rising. After detecting the point 411A, it is compared with the trend data 311, and at the same time when the rising point 411 is detected, it is determined that it is a rising pattern. Even if the trigger level is 111 or higher, the vibration pattern 212 is not detected and only the vibration pattern 211 is detected. Can be detected.

  FIG. 7 is a flowchart showing a main process of the vibration measuring apparatus 10 according to an embodiment of the present invention.

  In step S11, the vibration measurement device 10 (detection control unit 15) determines whether or not a rising trend is detected. More specifically, the vibration measuring apparatus 10 determines whether or not detection of a rising trend is designated as a detection condition for detecting vibration. If this determination is YES, the vibration measurement device 10 moves the process to step S12. If this determination is NO, the vibration measurement device 10 moves the process to step S13.

  In step S12, the vibration measurement device 10 (measurement unit 11, measurement data storage control unit 12, rise detection unit 13, comparison unit 16, determination unit 17, output unit 18) shifts the process to the rise trend detection process, and rises the trend. After performing the detection process, the process returns to this process, and then the process proceeds to step S13.

  In step S13, the vibration measuring device 10 (detection control unit 15) determines whether or not to detect a falling trend. More specifically, the vibration measuring apparatus 10 determines whether or not detection of a falling trend is designated as a detection condition for detecting vibration. If this determination is YES, the vibration measurement device 10 moves the process to step S14, and if this determination is NO, the vibration measurement device 10 ends the process.

  In step S14, the vibration measurement device 10 (the measurement unit 11, the measurement data storage control unit 12, the falling detection unit 14, the comparison unit 16, the determination unit 17, and the output unit 18) shifts the process to the falling trend detection process. After performing the falling trend detection process, the process returns to this process, and then the process ends.

  FIG. 8 is a flowchart showing the rising trend detection process of the vibration measuring apparatus 10 according to an embodiment of the present invention.

  In step S101, the vibration measurement device 10 measures vibration and stores measurement data. More specifically, the vibration measuring device 10 detects a voltage signal proportional to the acceleration of vibration by the vibration pickup, performs an effective value calculation process on the digital vibration acceleration data obtained by converting the detected voltage signal, and obtains it. The vibration level data obtained by calculating the ratio between the effective value and the reference acceleration is generated and stored in the measurement data DB 53. Thereafter, the vibration measuring device 10 moves the process to step S102.

  In step S102, the vibration measuring apparatus 10 determines whether to start rising trend comparison. More specifically, the vibration measuring device 10 determines whether or not the trend comparison start flag is 1. If this determination is YES, the vibration measurement device 10 moves the process to step S105, and if this determination is NO, the vibration measurement device 10 moves the process to step S103.

  In step S103, the vibration measurement apparatus 10 determines whether the measurement data is a rising start point. More specifically, the vibration measuring device 10 determines whether or not the difference between the level value of the measurement data and the level value of the rising start point stored in the trend DB 52 is within a predetermined range. If this determination is YES, the vibration measurement device 10 moves the process to step S104. If this determination is NO, the vibration measurement device 10 moves the process to step S101.

  In step S104, the vibration measuring apparatus 10 sets the trend comparison start flag to 1. Thereafter, the vibration measuring apparatus 10 moves the process to step S101.

  In step S105, the vibration measuring apparatus 10 compares the trend data with the rising pattern. More specifically, the vibration measuring device 10 compares the level value of the measurement data with the level value of the corresponding trend data stored in the rising pattern of the trend DB 52. Thereafter, the vibration measuring apparatus 10 moves the process to step S106.

  In step S106, the vibration measuring apparatus 10 determines whether or not the rising trend matches the rising trend. More specifically, the vibration measuring apparatus 10 determines whether or not the difference between the level value of the measurement data and the level value of the trend data is within a predetermined range. When this determination is YES, the vibration measurement device 10 moves the process to step S107, and when this determination is NO, the vibration measurement device 10 moves the process to step S110.

  In step S107, the vibration measuring apparatus 10 compares with the rising point. More specifically, the vibration measuring device 10 compares the level value of the measurement data with the level value of the rising point stored in the trigger level DB 51. Thereafter, the vibration measuring apparatus 10 moves the process to step S108.

  In step S108, the vibration measuring apparatus 10 determines whether or not they match. More specifically, the vibration measuring apparatus 10 determines whether or not the difference between the level value of the measurement data and the level value of the rising point is within a predetermined range. If this determination is YES, the vibration measurement device 10 moves the process to step S109, and if this determination is NO, the vibration measurement device 10 moves the process to step S101.

  In step S109, the vibration measuring apparatus 10 sets the trend comparison start flag to 0 and outputs a coincidence signal. Thereafter, the vibration measuring apparatus 10 returns the process to the step of moving to the main process.

  In step S110, the vibration measuring apparatus 10 sets the trend comparison start flag to 0. Thereafter, the vibration measuring apparatus 10 moves the process to step S101.

  FIG. 9 is a flowchart showing a falling trend detection process of the vibration measuring apparatus 10 according to an embodiment of the present invention.

  In step S201, as in step S101 of the rising trend detection process, the vibration measuring device 10 measures vibration and stores measurement data. Thereafter, the vibration measuring apparatus 10 moves the process to step S202.

  In step S202, the vibration measurement apparatus 10 determines whether to start falling trend comparison. More specifically, the vibration measuring device 10 determines whether or not the trend comparison start flag is 1. If this determination is YES, the vibration measurement device 10 moves the process to step S205, and if this determination is NO, the vibration measurement device 10 moves the process to step S203.

  In step S203, the vibration measurement apparatus 10 determines whether the measurement data is a falling point. More specifically, the vibration measuring device 10 determines whether or not the difference between the level value of the measurement data and the level value of the falling point stored in the trend DB 52 is within a predetermined range. When this determination is YES, the vibration measurement device 10 moves the process to step S204, and when this determination is NO, the vibration measurement device 10 moves the process to step S201.

  In step S204, the vibration measuring apparatus 10 sets the trend comparison start flag to 1. Thereafter, the vibration measuring apparatus 10 moves the process to step S201.

  In step S205, the vibration measuring apparatus 10 compares the trend data with a falling pattern. More specifically, the vibration measuring device 10 compares the level value of the measurement data with the level value of the corresponding trend data stored in the falling pattern of the trend DB 52. Thereafter, the vibration measuring apparatus 10 moves the process to step S206.

  In step S206, the vibration measuring apparatus 10 determines whether or not the falling trend matches. More specifically, the vibration measuring apparatus 10 determines whether or not the difference between the level value of the measurement data and the level value of the trend data is within a predetermined range. When this determination is YES, the vibration measurement device 10 moves the process to step S207, and when this determination is NO, the vibration measurement device 10 moves the process to step S210.

  In step S207, the vibration measuring apparatus 10 compares with the falling point. More specifically, the vibration measuring device 10 compares the level value of the measurement data with the level value of the falling point stored in the trigger level DB 51. Thereafter, the vibration measuring apparatus 10 moves the process to step S208.

  In step S208, the vibration measuring apparatus 10 determines whether or not they match. More specifically, the vibration measuring apparatus 10 determines whether or not the difference between the level value of the measurement data and the level value of the falling point is within a predetermined range. If this determination is YES, the vibration measurement device 10 moves the process to step S209, and if this determination is NO, the vibration measurement device 10 moves the process to step S201.

  In step S209, the vibration measuring apparatus 10 sets the trend comparison start flag to 0 and outputs a coincidence signal. Thereafter, the vibration measuring apparatus 10 returns the process to the step of moving to the main process.

  In step S210, the vibration measuring device 10 sets the trend comparison start flag to 0. Thereafter, the vibration measuring apparatus 10 moves the process to step S201.

  FIG. 10 is a diagram illustrating an example of a hardware configuration of the sound level meter 20 as the vibration measuring device 10 according to an embodiment of the present invention.

  The sound level meter 20 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. Convert to 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 compares 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, etc. (for example, the processing shown in FIGS. 7 to 9). ) To detect a specific pattern. 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. The trigger level DB 51 and the trend DB 52 may be generated.

  According to the present embodiment, the vibration measuring device 10 includes a trigger level DB 51 that stores a trigger level that is a vibration level that serves as a trigger for detecting a specific vibration, and a pattern for detecting a specific vibration. A trend DB 52 that stores trend data, which is a pattern representing vibration levels in time series, measures vibration levels in time series, and stores the measured vibration levels in measurement data DB 53 in time series. Then, the vibration measuring device 10 compares the measurement pattern and the trend data at the rising point by detecting the rising point according to the detection condition, determines whether or not they match, and determines that they match, A coincidence signal indicating that the measurement pattern coincides with the trend data is output. In addition, when the falling point is detected according to the detection condition, the vibration measuring device 10 compares the measurement pattern at the falling point with the trend data, determines whether or not they match, and determines that they match. In addition, a coincidence signal is output. Furthermore, the vibration measuring device 10 compares the measurement pattern and the trend data in each of the detected rising points and falling points according to the detection conditions, determines whether or not they match, and determines that they match. If it does, a match signal is output. Therefore, the vibration measuring device 10 can 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 10 Vibration measuring device 11 Measurement part 12 Measurement data storage control part 13 Rise detection part 14 Fall detection part 15 Detection control part 16 Comparison part 17 Judgment part 18 Output part 51 Trigger level DB
52 Trend DB
53 Measurement data DB

Claims (6)

A vibration measuring device for measuring vibration,
Trigger level storage means for independently storing a trigger level , which is a vibration level serving as a trigger for detecting a specific vibration, for each of the rising point and the falling point ;
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;
The vibration level measured by the measurement means is compared with the trigger level stored in the trigger level storage means, and the rising point at which the measured vibration level becomes higher from a level lower than the trigger level is determined. Rising detection means for detecting;
Detection control means for controlling whether to detect the specific vibration based on a detection condition for detecting the specific vibration;
When it is controlled to detect by the detection control means, a measurement pattern which is a vibration level pattern stored in time series in the measurement data storage means and the trend data stored by the trend storage means A comparison means for comparing;
Determination means for determining whether or not the measurement pattern and the trend data match based on the result of comparison by the comparison means;
An output means for outputting a coincidence signal indicating that the measurement pattern and the trend data coincide with each other when it is determined by the determination means to match,
When the detection condition is that a rising point is detected, the detection control means controls to detect the specific vibration when the rising point is detected by the rising detection means.
Vibration measuring device. The vibration level measured by the measuring means and the trigger level stored in the trigger level storage means are compared, and the falling point at which the measured vibration level becomes lower than the trigger level is higher than the trigger level. Further includes a falling detection means for detecting
When the detection condition is that a falling point is detected, the detection control unit performs control so that the specific vibration is detected when the falling point is detected by the falling detection unit. ,
The vibration measuring device according to claim 1. The detection control means detects the rising point by the rising detection means when the detection condition is that the rising point is detected and the falling point is detected, and the falling edge is detected. Control is performed so that the specific vibration is detected when the falling point is detected by a detecting means.
The vibration measuring device according to claim 2. A method performed by the vibration measurement device according to claim 1,
A measuring step in which the measuring means measures the vibration level in time series;
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
The detection means compares the vibration level measured in the measurement step with the trigger level stored in the trigger level storage means, and the measured vibration level is a level higher than a level lower than the trigger level. A rising edge detecting step for detecting a rising point to become;
A detection control step for controlling whether or not the detection control means detects the specific vibration based on a detection condition for detecting the specific vibration;
When the comparison means is controlled to perform detection by the detection control step, a measurement pattern that is a vibration level pattern stored in time series in the measurement data storage means and the trend storage means A comparison step for comparing the trend data;
A determination step for determining whether or not the measurement pattern and the trend data match based on the result of the comparison by the comparison step;
An output step of outputting a coincidence signal indicating that the measurement pattern and the trend data coincide when the output means is determined to be coincident by the determination step;
In the detection control step, when the detection condition is that a rising point is detected, control is performed so that the specific vibration is detected when the rising point is detected by the rising detection step.
Method. A vibration measuring device for measuring vibration,
Trigger level storage means for storing the level value of the rising point;
A trend storage means for storing trend data which is a pattern for detecting a rising edge of a specific vibration and includes a level value of a rising start point and which is a pattern representing vibration levels in time series;
Measuring means for measuring the vibration level in time series;
The vibration level measured by the measurement means is compared with the level value of the rising start point stored in the trend storage means, and the measured vibration level is higher from a level lower than the level of the rising start point. A rising start point detecting means for detecting a rising start point which becomes a level;
When the rising start point is detected by the rising start point detecting means, the vibration level measured by the measuring means for each sample and the level value of the trend data corresponding to the time stored in the trend storing means A comparison means for comparing
If the comparison result by the comparison means is the same until the vibration level measured by the measurement means reaches the level value of the rising point stored in the trigger level storage means, the comparison means for the next sample When the comparison is performed and the comparison result by the comparison means is inconsistent, the control means for ending the comparison by the comparison means for the next sample;
After the vibration level measured by the measurement means reaches the level value of the rising point stored in the trigger level storage means, the time-series pattern of the measured vibration level matches the trend data. Output means for outputting a coincidence signal indicating
Vibration measuring device. A vibration measuring device for measuring vibration,
Trigger level storage means for storing the level value of the falling point;
A trend storage means for storing trend data, which is a pattern for detecting the falling of a specific vibration, including a level value of a falling start point, and representing a vibration level in a time-series order;
Measuring means for measuring the vibration level in time series;
The vibration level measured by the measurement means is compared with the level value of the falling start point stored in the trend storage means, and the measured vibration level is higher than the level of the falling start point. A falling start point detecting means for detecting a falling start point that becomes a low level from
When the falling start point is detected by the falling start point detecting means, the vibration level measured by the measuring means and the trend data corresponding to the time stored in the trend storing means for each sample. A comparison means for comparing the level value;
When the comparison result by the comparison means is coincident until the vibration level measured by the measurement means reaches the level value of the falling point stored in the trigger level storage means, the comparison means for the next sample If the comparison result by the comparison means does not match, the control means for terminating the comparison by the comparison means for the next sample,
After the vibration level measured by the measurement means reaches the level value of the falling point stored in the trigger level storage means, the time-series pattern of the measured vibration level matches the trend data. Output means for outputting a coincidence signal indicating that,
Vibration measuring device.

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