JP6728796B2 - Vibration meter, vibration meter correction method, vibration meter correction program, vibration measurement system and control device - Google Patents

Description

The present invention relates to a vibration meter, a vibration meter correction method, a vibration meter correction program, a vibration measurement system, and a control device.

Conventionally, a vibrometer that displays a measurement value on a display based on a detection signal input from a sensor capable of detecting vibration is known, and in such a vibrometer, the detection signal input to the sensor is zero. Even in such a case, a non-zero output called an offset is generated in an amplifier or the like that constitutes the vibrometer, and the display on the display may not be zero, which causes a measurement error. As a method for correcting the zero point of the vibrometer, the following Patent Document 1 discloses a vibrometer in which the output when the ground is connected is used as an offset value by the amplifier circuit.
Further, Patent Document 2 below discloses a system in which temperature information of an observation point is acquired from a communication line and a measurement error of a sensor caused by a temperature change is reduced.

JP-A-2000-241238 JP, 10-142348, A

However, when the measured value is acquired from the installed vibrometer over a long period of time, the zero point fluctuates due to changes over time.However, with the above method, zero point correction at the start of measurement or temperature correction based on factory shipment data is used. However, since the long-term fluctuation of the zero point due to the change over time cannot be corrected, the vibration measurement cannot be performed with high accuracy for a long period of time.
The present invention has been made in view of the above problems, and an object of the present invention is to correct the zero-point fluctuation that occurs during measurement over a long period by a vibrometer.

The present invention has been made to solve at least a part of the problems described above, and can be realized as the following modes or application examples.

[Application example 1]
The vibrometer according to this application example detects a vibration and outputs the vibration data according to the detected vibration to the vibration detection unit, and the vibration data output by the vibration detection unit when it is determined to be stationary. A stationary state data generation unit that generates stationary state data based on the temperature, a temperature detection unit that detects temperature and outputs temperature data according to the detected temperature, and correction information based on the stationary state data and the temperature data. A correction information calculation unit, a storage unit that stores the correction information calculated by the correction information calculation unit, and the vibration data that is corrected based on the correction information stored in the storage unit, and the corrected vibration A vibration information processing unit that generates vibration information including data; and the correction information calculation unit, when the temperature data output by the temperature detection unit indicates a predetermined temperature, a reference value corresponding to the predetermined temperature. The correction information is calculated based on the stationary state data corresponding to the temperature data, and the calculated correction information is stored in the storage unit.

With such a configuration, when the temperature detected by the temperature detection unit indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the stationary state data indicating the stationary state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

[Application example 2]
In the vibrometer according to the above application example, it is preferable that the stationary state data generation unit includes a filter that extracts a component of a predetermined frequency from the vibration data.

With such a configuration, it is possible to extract a component of a predetermined frequency from the vibration data by the filter.

[Application example 3]
In the vibrometer according to the above application example, it is preferable that the stationary state data generation unit generates the stationary state data when the maximum amplitude value indicated by the vibration data is equal to or less than a predetermined value.

According to such a configuration, when the maximum amplitude value indicated by the vibration data is equal to or less than the predetermined value, the stationary state data is generated. Therefore, when the maximum amplitude value exceeds the predetermined value, the stationary state data is generated. Is not generated, the reliability of the stationary state data can be improved.

[Application example 4]
In the vibrometer according to the above application example, it is preferable that the stationary state data generation unit generates the stationary state data based on the generation instruction when the generation instruction is received from the outside.

With such a configuration, the stationary state data can be generated based on the generation instruction sent from the outside.

[Application example 5]
In the vibrometer according to the application example, it is preferable that the correction information calculation unit stores the calculated correction information in the storage unit when the calculated correction information matches a predetermined reference.

According to such a configuration, by storing the correction information that matches the reference in the storage unit, it is possible to exclude the correction information that exceeds the reference due to a failure or the like.

[Application example 6]
In the vibrometer according to the application example described above, the correction information calculation unit may rewrite the correction information stored in the storage unit with the calculated correction information.

[Application example 7]
In the vibrometer according to the application example described above, the reference value and the predetermined temperature may be determined at the time of manufacture and stored in the storage unit.

[Application example 8]
In the vibrometer according to the application example, the reference value is a value generated first in the stationary state data, and the storage unit may store the reference value in association with the predetermined temperature.

[Application example 9]
In the vibrometer according to the application example, the correction information calculation unit may calculate the correction information based on the initial value of the reference value and the latest static state data.

[Application Example 10]
In the vibrometer according to the above application example, the correction information calculation unit outputs a warning signal to the outside when a difference value between the reference value and the stationary state data exceeds a predetermined range. ..

According to such a configuration, it is possible to notify the abnormality of the stationary state data due to a failure or the like by the warning signal.

[Application example 11]
In the vibrometer according to the application example, the storage unit stores the time information when the correction information is generated and the correction information in association with each other, and the correction information calculation unit is configured to correct the plurality of corrections based on the time information. Information is extracted from the storage unit, and the correction information is calculated based on the plurality of extracted correction information and the reference value.

According to such a configuration, since the correction information is calculated based on the time information, the reliability of the correction information can be improved.

[Application Example 12]
In the vibrometer according to the application example, the correction information is a correction formula including a temperature as a parameter, and the correction information calculation unit calculates the correction information for each of the plurality of predetermined temperatures, and calculates the plurality of calculated corrections. The correction formula may be determined based on information.

[Application example 13]
The vibrometer according to the application example further includes a communication unit that communicates with the outside, and the correction information calculation unit stores the correction information in the storage unit according to a storage instruction received via the communication unit. May be.

[Application Example 14]
In the vibrometer according to the application example described above, the temperature detection unit may determine a time interval for detecting the temperature according to a measurement instruction received via the communication unit.

[Application example 15]
The vibrometer according to this application example detects a vibration and outputs a vibration data according to the detected vibration, and a predetermined value by processing the vibration data output by the vibration detection unit with a low-pass filter. Stationary state data generating section for extracting frequency components, temperature detecting section for detecting temperature and outputting temperature data according to the detected temperature, and correction for calculating correction information based on the stationary state data and the temperature data An information calculation unit, a storage unit that stores the correction information calculated by the correction information calculation unit, a vibration that corrects the vibration data based on the correction information stored in the storage unit, and a vibration that includes the corrected vibration data. A vibration information processing unit that generates information, the correction information calculation unit, when the temperature data output by the temperature detection unit indicates a predetermined temperature, the reference value corresponding to the predetermined temperature, and the temperature data. The correction information is calculated based on the stationary state data corresponding to, and the calculated correction information is stored in the storage unit.

With such a configuration, when the temperature detected by the temperature detection unit indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the static state data indicating the static state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

[Application example 16]
The vibrometer correction method according to the present application example, based on the vibration data indicating the detected vibration, generates the stationary state data in the stationary state, acquires the temperature data indicating the detected temperature, the temperature data is a predetermined temperature When it is determined that the temperature data indicates the predetermined temperature, correction is performed based on a reference value corresponding to the predetermined temperature and the stationary state data corresponding to the temperature data. Information is calculated and stored, the vibration data is corrected based on the stored correction information, and vibration information including the corrected vibration data is generated.

According to such a method, when the temperature detected by the temperature detecting unit indicates a predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the stationary state data indicating the stationary state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

[Application example 17]
The correction program for the vibrometer according to this application example has a function of generating stationary state data in a stationary state based on vibration data indicating detected vibration, a function of acquiring temperature data indicating detected temperature, and the temperature If the data indicates a predetermined temperature, it is determined whether or not the temperature data indicates the predetermined temperature, a reference value corresponding to the predetermined temperature, the stationary state data corresponding to the temperature data, Causing a computer to perform a function of calculating and storing correction information based on the correction information, and a function of correcting the vibration data based on the stored correction information and generating vibration information including the corrected vibration data. Is characterized by.

With such a configuration, when the temperature detected by the temperature detection unit indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the static state data indicating the static state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

[Application Example 18]
The vibration measurement system according to this application example detects a vibration and outputs the vibration data according to the detected vibration, and the vibration data output by the vibration detection unit when it is determined to be in a stationary state. A static state data generation unit that generates static state data based on the temperature, a temperature detection unit that detects temperature and outputs temperature data according to the detected temperature, and a correction based on the static state data and the temperature data. A correction information calculation unit that calculates information, a storage unit that stores the correction information calculated by the correction information calculation unit, and the vibration data is corrected and corrected based on the correction information stored in the storage unit. A vibration information processing unit that generates vibration information including vibration data, and a vibration information analysis unit that analyzes the vibration information generated by the vibration information processing unit, and the correction information calculation unit includes the temperature detection unit. When the output temperature data indicates a predetermined temperature, the correction information is calculated based on a reference value corresponding to the predetermined temperature and the stationary state data corresponding to the temperature data, and the calculated correction information is calculated. The data is stored in the storage unit.

With such a configuration, when the temperature detected by the temperature detection unit indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the stationary state data indicating the stationary state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

[Application example 19]
The control device according to this application example generates stationary state data in a stationary state based on the vibration data indicating the detected vibration, acquires temperature data indicating the detected temperature, and determines whether the temperature data indicates a predetermined temperature. When it is determined that the temperature data indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the stationary state data corresponding to the temperature data. Then, the vibration data is corrected based on the stored correction information, and vibration information including the corrected vibration data is generated.

With such a configuration, when the temperature detected by the temperature detection unit indicates the predetermined temperature, the correction information is calculated based on the reference value corresponding to the predetermined temperature and the stationary state data indicating the stationary state at that time. Then, the vibration data detected based on the stored correction information is corrected, and vibration information including the corrected vibration data is generated. Therefore, when the detected temperature is the predetermined temperature, the stored correction information is updated, so that the correction corresponding to the temperature fluctuation can be performed in the long-term measurement, and the accuracy of the measurement can be maintained for a long time.

FIG. 3 is a diagram illustrating a configuration of a system according to the first embodiment. The figure explaining the outline of the data memorize|stored in a memory|storage part. The flowchart which shows the process which a detection data management part manages detection data. 6 is a flowchart showing a process in which a correction value calculation unit calculates a correction value. 6 is a flowchart showing a process of outputting vibration data corrected by a data correction unit. FIG. 6 is a diagram illustrating a configuration of a system according to a second embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram illustrating a configuration of a vibration measurement system 100 according to the first embodiment. This vibration measuring system 100 has a function of analyzing vibration, and it is assumed that the vibration measuring device 50, which is one of the vibrometers, and the information processing device 60 are communicably connected.
The vibration measuring device 50 has, for example, a function of being mounted in a housing, installed in a structure such as a bridge or a building, measuring the vibration of the structure, and sending the measured vibration information to the information processing device 60. Further, the information processing device 60 assumes a server device, a personal computer, a multifunctional mobile terminal such as a tablet, a high-performance mobile phone such as a smartphone, and the like, and analyzes vibration information sent from the vibration measurement device 50. The information processing device 60 corresponds to a vibration information analysis unit.

The vibration measuring device 50 includes a vibration detection unit 10, a stationary state data generation unit 15, a temperature detection unit 20, a noise removal unit 25, a vibration information generation unit 30, and a communication unit 40.
The vibration detection unit 10 includes an acceleration sensor and an IMU (Internal Measurement Unit), and outputs vibration data according to the detected vibration. In this case, the vibration data may be an analog signal or a digital signal.
Vibration data output from the vibration detection unit 10 is input to the stationary state data generation unit 15. The stationary state data generation unit 15 outputs vibration data (referred to as stationary state data) when it is determined that the vibration measuring device 50 is in a stationary state without vibrating based on the input vibration data. To generate. For example, a bandpass filter that extracts a frequency band corresponding to the natural frequency of the installed structure is provided, and when the maximum amplitude value of the input vibration data is equal to or less than a predetermined value, it is determined to be a stationary state.

In the first embodiment, the stationary state data generation unit 15 is configured to include a low-pass filter as a filter, and a low-frequency component (substantially DC component) of the vibration data is extracted by extracting a vibration component of a predetermined frequency or less included in the vibration data. Is extracted, and an average value for a predetermined time is generated as static state data. Further, the stationary state data generation unit 15 may generate the average value of the vibration data for a predetermined time as the stationary state data when the maximum amplitude value of the vibration indicated by the vibration data is equal to or less than the predetermined value. The maximum amplitude value of the vibration data described above is the maximum difference value between the center value of the amplitude set based on the reference value and the vibration data.
The temperature detector 20 detects the temperature and outputs temperature data according to the detected temperature. In the first embodiment, the temperature detection unit 20 is assumed to be a temperature sensor including a thermal diode, a thermistor, a thermocouple, and the like, for example.

The noise removal unit 25 removes noise components from the temperature data output by the temperature detection unit 20 and outputs temperature data from which the noise components have been removed. In the first embodiment, a low pass filter is assumed.
To the vibration information generation unit 30, the vibration data output from the vibration detection unit 10, the static state data output from the static state data generation unit 15, and the temperature data output from the noise removal unit 25 are input. The zero point correction for the offset caused by the change over time is performed based on the data of (1), and is output as vibration information including the corrected vibration data.

The vibration information generation unit 30 includes a detection data management unit 32, a storage unit 34, a correction value calculation unit 36, and a data correction unit 38. The vibration information generation unit 30 corresponds to a control device.
In the first embodiment, the storage unit 34 is assumed to be a non-volatile storage medium such as a flash memory or a hard disk. The functional units of the detection data management unit 32, the correction value calculation unit 36, and the data correction unit 38 include hardware such as CPU and RAM, which are not shown, and software stored in the storage unit 34 (of the vibrometer). Correction program) and a functional configuration realized by cooperation with the correction program), and a specific implementation form is not particularly limited. Therefore, it is not always necessary to individually implement hardware corresponding to each functional unit, and one processor may execute a program to realize the functions of a plurality of functional units.

Further, part of the functions realized by software may be realized by hardware, or part of the functions realized by hardware may be realized by software.
The detection data management unit 32 stores, in the storage unit 34, the stationary state data corresponding to a predetermined reference temperature (predetermined temperature) as detection data based on the stationary state data and the temperature data. In this case, the detection data includes time information when the stationary state data was stored. Here, FIG. 2 is a diagram for explaining the outline of the data stored in the storage unit 34, and will be described with reference to FIG. 2 as well.

In the first embodiment, as the predetermined reference temperatures, four levels of −5 degrees, +5 degrees, +15 degrees and +25 degrees (all in degrees Celsius) are assumed as shown in FIG. 2, but the present invention is not limited to this. .. For example, a mode in which the user sets the temperature and the number of levels according to the environment in which the vibration measuring device 50 is installed can be assumed.
Further, if the temperature difference between the temperature indicated by the temperature data and the reference temperature is within a predetermined value (for example, ±0.5 degrees), it may be included in the reference temperature.

Further, the detection data management unit 32 may store a plurality of pieces of detection data having different time information at each reference temperature in the storage unit 34 for the first time or the second time, or the detection data stored in the storage unit 34. It is also possible to envisage a mode in which, when the data amount of 1 exceeds a predetermined reference amount, the detected data having the oldest date and time generated based on the time information are deleted in order.
The correction value calculation unit 36 calculates a correction value for correcting the vibration data based on the detection data and the reference value stored in the storage unit 34.

Here, the reference value is an initial value of the stationary state data determined for each reference temperature in order to correct the offset. This reference value is a constant value (A0 to D0), and is determined at the time of factory shipment, which is the time of manufacture, for example, and is stored in the storage unit 34.
The correction value calculation unit 36 extracts the latest detection data from the detection data stored in the storage unit 34 with reference to the time information of each reference temperature, and calculates the difference value from the reference value. The calculated difference value is called a correction value at each reference temperature. For example, when the reference temperature is -5 degrees and the latest detection data is A3, the correction value Ad at -5 degrees is the difference value between A0 and A3.

Further, the correction value calculation unit 36 also calculates correction values (Bd, Cd, Dd) at other reference temperatures (+5 degrees, +15 degrees, +25 degrees), and calculates an average value Q for the correction values of all reference temperatures. To do.
The correction value calculation unit 36 writes the average value Q of the correction values at the reference temperature in the storage unit 34 as the correction value.
The correction value calculation unit 36 may write the correction value in the storage unit 34 when the correction value matches a predetermined reference.
Incidentally, at the time of factory shipment, the same value as the reference value is written as the detection data. Therefore, at the time of factory shipment, the correction value at each reference temperature and the average value Q become zero.
The correction value calculation unit 36 corresponds to the correction information calculation unit, and the correction value corresponds to the correction information.
Further, although the difference value between the reference value and the detection data is used as the correction value, the detection data (static information data) at each reference temperature itself may be stored as the correction value. In this case, the still information data corresponds to the correction information.

The data correction unit 38 corrects the vibration data output from the vibration detection unit 10 by calculating using the correction value stored in the storage unit 34, and the corrected result is used as vibration information in the communication unit 40. Output to. The data correction unit 38 corresponds to a vibration information processing unit.
In the first embodiment, the data correction unit 38 determines the vibration information by calculating the difference between the vibration data and the correction value.
The vibration information generation unit 30 monitors changes in the correction value written in the storage unit 34 in time series. Therefore, when the correction value or the variation of the correction value exceeds the predetermined range, that is, when the difference value between the latest detection data and the reference value exceeds the predetermined reference value, the error information including the warning signal is communicated. It may be output to the unit 40. As a result, it is possible to notify the occurrence of a failure in the vibration data correction function.

The communication unit 40 transmits the vibration information output from the data correction unit 38 to the information processing device 60 by communication.
The communication unit 40 may include, for example, a CAN (Controller Area Network) connectable controller or transceiver. In this case, the communication unit 40 communicates with the information processing device 60 via USB or Ethernet (registered trademark).
In addition, the communication unit 40 includes Bluetooth (registered trademark) (including BTLE: Bluetooth Low Energy), Wi-Fi (registered trademark) (Wi-Fi: Wireless Fidelity), Zigbee (registered trademark), NFC (Near field communication). , ANT+ (registered trademark) or the like may be included in the transceiver.

The information processing device 60 analyzes the vibration of the structure in which the vibration measuring device 50 is installed, based on the vibration information sent from the vibration measuring device 50. In addition, in the first embodiment, the vibration measurement system 100 assumes a mode in which the information processing device 60 and the vibration measurement device 50 are associated with each other in a ratio of 1:1; For example, a mode in which a plurality of vibration measuring devices 50 are installed in a structure, the plurality of vibration measuring devices 50 send respective vibration information to the information processing device 60, and the information processing device 60 analyzes the plurality of vibration information can be assumed. .. Further, the vibration measuring device 50 may send the vibration information to the plurality of information processing devices 60.

Next, a vibrometer correction method will be described with reference to FIGS. 3, 4, and 5.
FIG. 3 is a flowchart showing a process in which the detection data management unit 32 manages detection data. In the first embodiment, it is assumed that this processing is executed at 1-minute intervals after the vibration measuring device 50 is activated and a predetermined stabilization time (for example, 30 minutes) has elapsed.
When the process is started, the detection data management unit 32 acquires the temperature data and the stationary state data (step S200).
Next, the detection data management unit 32 determines whether or not the temperature indicated by the temperature data is -5 degrees, which is the reference temperature (step S202). In the following description, if the difference from the reference temperature is within a predetermined value (for example, ±0.5 degrees), it may be determined that the reference temperature is applicable.

Here, when it is determined that the temperature indicated by the temperature data is −5 degrees (Yes in step S202), the detection data management unit 32 associates the reference temperature with −5 degrees, the current time information, and the stationary state. The data (detection data) and the data are stored in the storage unit 34 (step S204), and the process ends.
On the other hand, when it is determined that the temperature indicated by the temperature data is not −5 degrees (No in step S202), the detection data management unit 32 proceeds to the next step (step S206).
In step S206, the detection data management unit 32 determines whether or not the temperature indicated by the temperature data is +5 degrees.

Here, when it is determined that the temperature indicated by the temperature data is +5 degrees (Yes in step S206), the detection data management unit 32 associates the reference temperature with +5 degrees, and the current time information and the stationary state data ( Detection data) and the storage unit 34 (step S208), and the process ends.
On the other hand, when it is determined that the temperature indicated by the temperature data is not +5 degrees (No in step S206), the detection data management unit 32 proceeds to the next step (step S210).
In step S210, the detection data management unit 32 determines whether or not the temperature indicated by the temperature data is +15 degrees.

Here, when it is determined that the temperature indicated by the temperature data is +15 degrees (Yes in step S210), the detection data management unit 32 associates the reference temperature with +15 degrees, and the current time information and the stationary state data ( Detection data) and the storage unit 34 (step S212), and the process ends.
On the other hand, when it is determined that the temperature indicated by the temperature data is not +15 degrees (No in step S210), the detection data management unit 32 proceeds to the next step (step S214).

In step S214, the detection data management unit 32 determines whether or not the temperature indicated by the temperature data is +25 degrees.
Here, when it is determined that the temperature indicated by the temperature data is +25 degrees (Yes in step S214), the detection data management unit 32 associates the reference temperature with +25 degrees and associates the reference temperature with +25 degrees, and the current time information and the stationary state data ( (Detection data) and are stored in the storage unit 34 (step S216), and the process ends.
On the other hand, if it is determined that the temperature indicated by the temperature data is not +25 degrees (No in step S214), the process ends.

FIG. 4 is a flowchart showing a process in which the correction value calculation unit 36 calculates a correction value. In the first embodiment, it is assumed that this process is performed at intervals of once a day after the vibration measuring device 50 is activated and a predetermined stabilization time (for example, 30 minutes) has elapsed. Note that this process may be executed based on an instruction from an external device different from the vibration measuring device 50 such as the information processing device 60.
When the process is started, the correction value calculation unit 36 determines whether or not the data related to −5 degrees is stored in the storage unit 34 (step S220).

Here, when it is determined that the data related to −5 degrees is stored in the storage unit 34 (Yes in step S<b>220 ), the correction value calculation unit 36 determines, from the data stored in the storage unit 34, A difference value between the latest stationary state data and the reference value is calculated, and the calculated difference value is stored in the storage unit 34 as a correction value at −5 degrees (step S222), and the process proceeds to step S224.
On the other hand, when it is determined that the data related to −5 degrees is not stored in the storage unit 34 (No in step S220), the process proceeds to step S224.

In step S224, the correction value calculation unit 36 determines whether or not the data related to +5 degrees is stored in the storage unit 34.
Here, when it is determined that the data related to +5 degrees is stored in the storage unit 34 (Yes in step S224), the correction value calculation unit 36 selects the latest data from the data stored in the storage unit 34. The difference value between the stationary state data of No. 1 and the reference value is calculated, and the calculated difference value is stored in the storage unit 34 as a correction value at +5 degrees (step S226), and the process proceeds to step S228.

On the other hand, when it is determined that the data related to +5 degrees is not stored in the storage unit 34 (No in step S224), the process proceeds to step S228.
In step S228, the correction value calculation unit 36 determines whether or not the data related to +15 degrees is stored in the storage unit 34.
Here, when it is determined that the data related to +15 degrees is stored in the storage unit 34 (Yes in step S228), the correction value calculation unit 36 selects the latest data from the data stored in the storage unit 34. The difference value between the stationary state data of No. and the reference value is calculated, and the calculated difference value is stored in the storage unit 34 as a correction value at +15 degrees (step S230), and the process proceeds to step S232.

On the other hand, when it is determined that the data related to +15 degrees is not stored in the storage unit 34 (No in step S228), the process proceeds to step S232.
In step S232, the correction value calculation unit 36 determines whether or not the data related to +25 degrees is stored in the storage unit 34.
Here, when it is determined that the data related to +25 degrees is stored in the storage unit 34 (Yes in step S232), the correction value calculation unit 36 selects the latest data from the data stored in the storage unit 34. The difference value between the stationary state data of No. 1 and the reference value is calculated, and the calculated difference value is stored in the storage unit 34 as a correction value at +25 degrees (step S234), and the process proceeds to step S236.

On the other hand, when it is determined that the data related to +25 degrees is not stored in the storage unit 34 (No in step S232), the process proceeds to step S236.
In step S236, the correction value calculation unit 36 reads each difference value stored in the storage unit 34, that is, the correction value at the reference temperature (−5 degrees, +5 degrees, +15 degrees, +25 degrees), and calculates the average value. ..
Next, the correction value calculation unit 36 stores the calculated average value in the storage unit 34 as a correction value used by the data correction unit 38 (step S238), and ends the process.

FIG. 5 is a flowchart showing a process of outputting the vibration data corrected by the data correction unit 38. In the first embodiment, it is assumed that this processing is executed at 1-minute intervals after the vibration measuring device 50 is activated and a predetermined stabilization time (for example, 30 minutes) has elapsed.
When the process is started, the data correction unit 38 acquires the vibration data output from the vibration detection unit 10 (step S240).

Next, the data correction unit 38 reads the correction value stored in the storage unit 34 (step S242).
Next, the data correction unit 38 corrects the vibration data with the correction value (step S244).
Next, the data correction unit 38 outputs the corrected vibration data as vibration information (step S246), and ends the process.

According to the first embodiment described above, the following effects are achieved.
(1) The reference values corresponding to the four levels of temperature are previously determined and stored, and when the detected temperature is any of the four levels, the static state data obtained by extracting the DC component from the vibration data and the detected temperature are set. The difference value with the corresponding reference value is calculated, and the average value of the difference values at each level is stored as a correction value. Then, the difference between the detected vibration data and the correction value is calculated to correct the vibration data. Therefore, it is possible to correct the zero point corresponding to the temperature fluctuation in the long-term measurement, and it is possible to maintain the accuracy of the measurement for a long time.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the following description, the same parts as those already described are designated by the same reference numerals and the description thereof will be omitted.
FIG. 6 is a diagram illustrating the configuration of the vibration measurement system 100 according to the second embodiment. In the first embodiment, the vibration measuring device 50 has the calculation function and the storage function, but in the second embodiment, the information processing device 60 has the calculation function and the storage function.
That is, the vibration measuring device 50 includes the vibration detection unit 10, the stationary state data generation unit 15, the temperature detection unit 20, the noise removal unit 25, and the communication unit 40. In addition, the information processing device 60 includes a communication unit 62 that communicates with the vibration measuring device 50, a detection data management unit 32, a storage unit 34, a correction value calculation unit 36, and a data correction unit 38.

In the second embodiment, the vibration measuring device 50 transmits the vibration data, the temperature data and the stationary state data to the information processing device 60, and the information processing device 60 vibrates based on the received vibration data, the temperature data and the stationary state data. Generate information. Further, the information processing device 60 sends the generated vibration information to the information processing unit 64 and performs various analysis processes based on the vibration information.

According to the second embodiment described above, the following effects are obtained in addition to the effects described in the first embodiment.
(2) Since the information processing device 60 has the arithmetic function and the storage function, the vibration measuring device 50 can be downsized and power can be saved.

The preferred embodiment has been described above with reference to the accompanying drawings, but the preferred embodiment is not limited to the above embodiment. It goes without saying that the embodiment can be variously modified without departing from the scope of the invention, and the following modified examples can be assumed.

(1) The stationary state data generation unit 15 may receive a generation instruction from the vibration information generation unit 30 or the information processing device 60, and may generate the stationary state data according to the received generation instruction. For example, in FIG. 1, the communication unit 40 and the stationary state data generating unit 15 are connected by a connection line (not shown), and the information processing device 60 sends the vibration measuring device 50 a timing in a stationary state in which vibration due to disturbance does not occur. When notified, the stationary state data generation unit 15 may generate the stationary state data upon receiving this notification. Further, it is also possible to accept information about a high frequency component (AC component) to be removed, remove a predetermined frequency component from the vibration data based on the accepted information, and extract the DC component of the vibration data. As a result, the stationary state data can be efficiently generated.

(2) The correction value calculation unit 36 extracts the latest detection data from the detection data stored in the storage unit 34, and uses the difference value from the reference value as the correction value, which is stored in the storage unit 34. From the detection data, based on the time information, for example, a plurality of detection data generated within a predetermined period is extracted, statistical processing (for example, average value) is applied to the extracted detection data, and the result of statistical processing The difference between the reference value and the reference value may be used as the correction value. Thereby, the reliability of the correction value can be improved. Further, based on the time information, a plurality of pieces of correction data including the latest correction data generated within a predetermined period are extracted, and statistical processing is performed on the extracted correction data (for example, a weighted value closer to the current time is weighted). The average value may be applied and the result of statistical processing may be used as the correction value.
(3) The correction value is not limited to the aspect of calculating the difference as the offset coefficient. For example, the correction value is a coefficient of a correction polynomial (correction formula) including temperature as a parameter, and the coefficient of the correction polynomial may be determined based on the correction value for each of a plurality of reference temperatures. Thereby, the correction accuracy can be improved.

(4) The correction value calculation unit 36 may receive a storage instruction from the information processing device 60 and store the correction value in the storage unit 34 according to the received storage instruction. Thereby, the correction value to be stored in the storage unit 34 can be selected according to the storage instruction.
(5) The temperature detection unit 20 may receive a measurement instruction from the information processing device 60 and determine the time interval for measuring the temperature based on the received measurement instruction. As a result, the temperature can be measured at a necessary timing according to the measurement instruction.

(6) In the second embodiment, the stationary state data generation unit 15 and the noise removal unit 25 included in the vibration measurement device 50 may be included in the information processing device 60. Therefore, the vibration measuring device 50 includes the vibration detecting unit 10 and the temperature detecting unit 20, and the detected data is processed by the information processing device 60, so that the vibration measuring device 50 can be further downsized and power saving.

10... Vibration detection unit, 15... Still state data generation unit, 20... Temperature detection unit, 25... Noise removal unit, 30... Vibration information generation unit, 32... Detection data management unit, 34... Storage unit, 36... Correction value calculation Part, 38... Data correction part, 40... Communication part, 50... Vibration measurement device, 60... Information processing device, 62... Communication part, 64... Information processing part, 100... Vibration measurement system.

Claims (19)

A vibration detection unit that detects vibration and outputs vibration data according to the detected vibration,
A stationary state data generation unit that generates stationary state data based on the vibration data output by the vibration detection unit when it is determined to be in a stationary state;
A temperature detection unit that detects temperature and outputs temperature data according to the detected temperature;
The stationary state data corresponding to any of the plurality of reference temperatures and time information storing the stationary state data are stored as detection data, and the initial value of the stationary state data set for each of the plurality of reference temperatures is used. A storage unit that stores a certain reference value ,
From the detection data stored in the storage unit, for each reference temperature, the latest detection data is extracted with reference to time information, and the difference between the stationary state data included in the extracted detection data and the reference value. A correction information calculation unit that calculates a value as correction information;
A vibration information processing unit that corrects the vibration data based on the correction information and generates vibration information that includes the corrected vibration data;
A vibrometer, wherein the correction information is stored in the storage unit. The vibrometer according to claim 1,
The vibrometer, wherein the stationary state data generation unit includes a filter that extracts a component of a predetermined frequency from the vibration data. The vibrometer according to claim 1 or 2,
The vibrometer, wherein the stationary state data generation unit generates the stationary state data when the maximum amplitude value in the vibration data is equal to or less than a predetermined value. The vibrometer according to any one of claims 1 to 3,
The vibrometer, wherein the stationary state data generation unit generates the stationary state data based on the generation instruction when receiving a generation instruction from the outside. The vibrometer according to any one of claims 1 to 4,
The vibrometer, wherein the correction information calculation unit stores the calculated correction information in the storage unit when the calculated correction information matches a predetermined reference. The vibrometer according to any one of claims 1 to 5,
The vibrometer, wherein the correction information calculation unit rewrites the correction information stored in the storage unit with the calculated correction information. The vibrometer according to any one of claims 1 to 6,
The vibrometer, wherein the reference value and the predetermined temperature are determined at the time of manufacture and stored in the storage unit. The vibrometer according to any one of claims 1 to 6,
The reference value is the first generated value of the static data,
The vibrometer, wherein the storage unit stores the reference value in association with the predetermined temperature. The vibrometer according to claim 7 or 8,
The vibrometer, wherein the correction information calculation unit calculates the correction information based on an initial value of the reference value and the latest static state data. The vibration meter according to any one of claims 1 to 9,
The vibrometer, wherein the correction information calculation unit outputs a warning signal to the outside when a difference value between the reference value and the stationary state data exceeds a predetermined range. The vibrometer according to any one of claims 1 to 10,
The storage unit stores the time information when the correction information is generated and the correction information in association with each other,
The correction information calculation unit extracts a plurality of the detection data from the storage unit based on the time information, and calculates the correction information based on the plurality of extracted detection data and the reference value. Vibrometer. The vibrometer according to any one of claims 1 to 11,
The correction information is a correction formula including temperature as a parameter,
The vibrometer, wherein the correction information calculation unit calculates the correction information for each of the plurality of predetermined temperatures and determines the correction formula based on the plurality of calculated correction information. The vibration meter according to any one of claims 1 to 12,
Further comprising a communication unit for communicating with the outside,
The vibrometer, wherein the correction information calculation unit stores the correction information in the storage unit according to a storage instruction received via the communication unit. The vibration meter according to claim 13,
The vibrometer, wherein the temperature detection unit determines a time interval for detecting temperature according to a measurement instruction received via the communication unit. A vibration detection unit that detects vibration and outputs vibration data according to the detected vibration,
A stationary state data generation unit that processes the vibration data output by the vibration detection unit with a low-pass filter and extracts a component of a predetermined frequency;
A temperature detection unit that detects temperature and outputs temperature data according to the detected temperature;
The stationary state data corresponding to any of the plurality of reference temperatures and time information storing the stationary state data are stored as detection data, and the initial value of the stationary state data set for each of the plurality of reference temperatures is used. A storage unit that stores a certain reference value ,
From the detection data stored in the storage unit, for each reference temperature, the latest detection data is extracted with reference to time information, and the difference between the stationary state data included in the extracted detection data and the reference value. A correction information calculation unit that calculates a value as correction information;
A vibration information processing unit that corrects the vibration data based on the correction information and generates vibration information that includes the corrected vibration data;
A vibrometer, wherein the correction information is stored in the storage unit. Based on the vibration data indicating the detected vibration, generate the stationary state data in the stationary state,
Obtain temperature data indicating the detected temperature,
The rewritable storing the time information which the a stationary state data storing the still state data corresponding to one of a plurality of reference temperatures as detection data, the initial value of the static state data that is set to each of a plurality of reference temperatures Memorize the reference value which is
From the stored detection data, the latest detection data is extracted with reference to time information for each reference temperature, and the difference value between the stationary state data and the reference value included in the extracted detection data is corrected. Calculated and stored as information,
A method for correcting a vibration meter, comprising: correcting the vibration data based on the stored correction information, and generating vibration information including the corrected vibration data. Based on the vibration data indicating the detected vibration, the function to generate the stationary state data in the stationary state,
A function to acquire temperature data indicating the detected temperature,
The stationary state data corresponding to any of the plurality of reference temperatures and time information storing the stationary state data are stored as detection data, and the initial value of the stationary state data set for each of the plurality of reference temperatures is used. A function to store a certain reference value ,
From the stored detection data, for each reference temperature, the latest detection data is extracted with reference to time information, and the difference value between the stationary state data included in the extracted detection data and the reference value <br /> as a correction information, and a function of storing,
A vibrometer correction program, which causes a computer to execute a function of correcting the vibration data based on the stored correction information and generating vibration information including the corrected vibration data. A vibration detection unit that detects vibration and outputs vibration data according to the detected vibration,
A stationary state data generation unit that generates stationary state data based on the vibration data output by the vibration detection unit when it is determined to be in a stationary state;
A temperature detection unit that detects temperature and outputs temperature data according to the detected temperature;
The stationary state data corresponding to any of the plurality of reference temperatures and time information storing the stationary state data are stored as detection data, and the initial value of the stationary state data set for each of the plurality of reference temperatures is used. A storage unit that stores a certain reference value ,
From the stored detection data, the latest detection data is extracted with reference to time information for each reference temperature, and the difference value between the stationary state data and the reference value included in the extracted detection data is corrected. A correction information calculation unit that calculates as information,
A vibration information analysis unit that analyzes the vibration information generated by the vibration information processing unit;
A vibration measurement system, wherein the correction information is stored in the storage unit. Based on the vibration data indicating the detected vibration, generate the stationary state data in the stationary state,
Obtain temperature data indicating the detected temperature,
The stationary state data corresponding to any of the plurality of reference temperatures and the time information storing the stationary state data are stored as detection data, and are initial values of the stationary state data set for each of the plurality of reference temperatures. Remember the reference value ,
From the detection data stored in the storage unit, for each reference temperature, the latest detection data is extracted with reference to time information, and the difference between the stationary state data included in the extracted detection data and the reference value. Calculate and store the value as correction information,
A control device which corrects the vibration data based on the stored correction information and generates vibration information including the corrected vibration data.

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