JP7000764B2 - Change point detection server, change point detection device, change point detection system and change point detection program - Google Patents

Description

The present invention relates to a technique for detecting a change point of equipment online.

For example, the following diagnostic system is known as a system for detecting a change point of equipment online.

The diagnostic system of Patent Document 1 connects a diagnostic terminal, a test result viewing terminal, a data analysis terminal, and a database in a local network to share diagnostic records of factory equipment.

The diagnostic system of Patent Document 2 is a technique for performing diagnosis without transmitting data having a large amount of information such as waveforms used for equipment diagnosis to a server or the like. That is, if waveform data is collected and diagnosed by a terminal installed in the local network and it is determined from the diagnosis results that more detailed diagnosis is necessary, the server is inquired via the Internet and the program required for diagnosis is executed on the server. Make a diagnosis while downloading from.

Japanese Unexamined Patent Publication No. 2004-341625 Japanese Unexamined Patent Publication No. 2010-27076

Since the diagnostic system of Patent Document 1 is configured to store the data used for equipment diagnosis in the local network, it is necessary to connect to the local network in order to browse the data. Therefore, this system cannot view diagnostic data from the outside via the Internet, which delays the response when an abnormality occurs.

In the diagnostic system of Patent Document 2, the terminal for equipment monitoring and the server perform diagnosis while communicating with each other via the Internet, but the diagnosis result is collectively stored in the terminal for equipment monitoring. Therefore, since the diagnosis result cannot be viewed from the outside, the response when an abnormality occurs is delayed as in the system of Patent Document 1.

In general, when performing a diagnosis based on vibration or acoustic waveform data, perform a fast Fourier transform (hereinafter referred to as FFT) on the waveform data, and compare the FFT waveform at the normal time with the FFT waveform at the time of executing the diagnosis to make a difference. Check and if a waveform with a frequency that did not occur in the normal state is generated, it is judged to be abnormal. It is desirable to save the diagnosis result on a server or the like that can be connected to the Internet so that the diagnosis result can be confirmed immediately when an abnormality occurs.

However, when performing a diagnosis with FFT on a server, waveform data is required, but since the waveform data has a large data size, the amount of communication increases when the waveform data is transmitted and received via the Internet. In addition, when a facility diagnosis system is introduced in an existing measurement target, it may be difficult to newly wire a wired network depending on the installation environment, so it is possible to use a wireless communication system that uses a mobile phone network. desirable. In this case, when transmitting waveform data having a large capacity over a network, the communication speed is slow and the communication time becomes long. In addition, shortening the communication time leads to an increase in the line usage fee.

In view of the above circumstances, it is an object of the present invention to detect a change point of an object online at a low cost.

Therefore, one aspect of the present invention is a change point detection server that detects a change point in the state of an object, and is obtained by a high-speed Fourier transform indicating the latest state of the object received via a mobile phone network. Based on a comparison between the image processing unit that extracts the latest spectrum image data showing the characteristics of the latest state from the latest graph image data and the latest spectrum image data and the initial spectrum image data showing the characteristics of the initial state of the object. It is provided with an image determination unit that detects a change point of the object.

One aspect of the present invention further includes an image display unit for superimposing and displaying the latest spectral image data and the initial spectral image data in the change point detection server.

In one aspect of the present invention, in the change point detection server, the image display unit displays an alarm based on the change point on the superimposed display image.

In one aspect of the present invention, in the change point detection server, the image display unit attaches an image of the superimposed display on which the alarm is displayed to a web page.

In one aspect of the present invention, in the change point detection server, the image display unit outputs message information based on the alarm.

One aspect of the present invention further includes a storage unit for storing the latest graph image data in the change point detection server.

One aspect of the present invention is a change point detection device that detects a change point in the state of an object, which is a conversion unit that converts analog signal data indicating the state of the object into digital signal data, and the digital signal. To the image generation unit that creates the latest graph image data showing the latest state of the object by high-speed Fourier conversion of the data of the above, and to the server that detects the change point of the object by the mobile phone network from the latest graph image data. It is equipped with a communication unit for transmission.

One aspect of the present invention is a change point detection system that detects a change point in the state of an object, and has the above change point detection device and the above change point detection server.

The present invention relates to a change point detection program that causes a computer to function as the change point detection server, or a change point detection program that causes the computer to function as a change point detection device including the conversion unit and the image generation unit. You can also do it.

According to the above invention, it is possible to detect a change point of an object at a low cost online.

The block block diagram of the change point detection system in embodiment of this invention. An explanatory diagram of an example of image creation and the procedure thereof in the above embodiment. Explanatory drawing of an example of a warning display in the said embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Structure example of the device and system of this embodiment]
The change point detection system 1 of the present embodiment exemplified in FIG. 1 is a detection system for detecting a change point of a state of a measurement target device 10 which is an object, and is a change point detection device 2 and a change point detection. It has a server 3.

The change point detection device 2 is a change point detection device for detecting a change point of the state of the measurement target device 10, and includes a sensor unit 20, an AD conversion unit 21, an image generation unit 22, and a wireless communication unit 23.

The sensor unit 20 detects the state of the measurement target device 10 and outputs a waveform signal indicating the state. As the sensor unit 20, a well-known sensor that can output high-speed waveform data such as an acceleration sensor and an acoustic sensor as analog signal data is applied.

The AD conversion unit 21 converts the analog signal data indicating the state of the measurement target device 10 into digital signal data by AD conversion.

The image generation unit 22 performs a high-speed Fourier transform on the digital signal data to create the latest graph image data 302 showing the latest state of the measurement target device 10.

The wireless communication unit 23 transmits the latest graph image data 302 to the change point detection server 3 by the mobile phone network 5.

The change point detection server 3 detects the change point of the state of the measurement target device 10. The change point detection server 3 implements an image file storage unit 30, an image processing unit 31, an image determination unit 32, and an image display unit 33 in cooperation with computer hardware resources and software resources.

The image processing unit 31 shows the features of the latest state by image analysis of the latest graph image data 302 obtained by the fast Fourier transform showing the latest state of the measurement target device 10 received via the mobile phone network 5. The spectral image data 304 is extracted (S2 in FIG. 2). Similarly, the initial spectrum image data 303 is extracted by image analysis of the initial graph image data 301.

Further, the image processing unit 31 creates a composite spectrum image data 305 in which the latest spectrum image data 304 and the initial spectrum image data 303 are superimposed and displayed (S3 in the figure). Further, the graph comparison image data 306 in which the comparison graph-based image data 300 and the composite spectrum image data 305 are superimposed and displayed is created (S5 in the figure).

The image determination unit 32 detects the change point of the measurement target device 10 based on the comparison between the latest spectrum image data 304 and the initial spectrum image data 303 showing the characteristics of the initial state of the measurement target device 10. The initial spectrum image data 303 is extracted in advance from the initial graph image data 301 showing the normal state of the measurement target device 10 obtained by performing a high-speed Fourier transform on the analog signal data in the normal state of the measurement target device 10. It is a thing.

The image display unit 33 superimposes and displays the latest spectrum image data 304 and the initial spectrum image data 303. In addition, an alarm based on the change point is displayed on the superimposed display image. Further, an image of the superimposed display on which the alarm is displayed is attached to the web page. In addition, message information based on the alarm is output.

The image file storage unit 30 stores the initial graph image data 301 and the latest graph image data 302.

[Procedure of image processing of this embodiment]
The image processing procedures S1 to S5 of the present embodiment will be described with reference to FIGS. 1 and 2.

S1: The AD conversion unit 21 converts the analog signal data indicating the latest state of the measurement target device 10 input from the sensor unit 20 into the digital signal data.
Next, the image generation unit 22 performs a high-speed Fourier transform on the digital signal data to create the latest graph image data 302 showing the latest state of the measurement target device 10. The latest graph image data 302 is created in, for example, a JPEG or PDF file format in order to minimize the data size. The initial graph image data 301 is also created in the same file format. The latest graph image data 302 is transmitted to the change point detection server 3 by the wireless communication unit 23 via the mobile phone network 5. The latest graph image data 302 provided to the change point detection server 3 is stored in the image file storage unit 30.

S2: The image processing unit 31 extracts the graph line of the latest graph image data 302 by image analysis of the latest graph image data 302 extracted from the image file storage unit 30 and extracts it as the latest spectrum image data 304.

Similarly, the initial graph image data 301 extracted from the image file storage unit 30 is extracted as the initial spectrum image data 303 by extracting the graph line of the initial graph image data 301 by image analysis by the image processing unit 31.

S3: The image processing unit 31 creates a composite spectrum image data 305 in which the latest spectrum image data 304 and the initial spectrum image data 303 are superimposed and displayed by a synthesis process of the latest spectrum image data 304 and the initial spectrum image data 303.

S4: The image processing unit 31 extracts the comparison graph-based image data 300 from the image file storage unit 30. The comparison graph-based image data 300 is image data showing an alarm threshold line based on a comparison between the latest spectrum image data 304 and the initial spectrum image data 303, and is created in advance and stored in the image file storage unit 30. ..

S5: The image processing unit 31 creates a graph comparison image data 306 in which the comparison graph-based image data 300 and the composite spectrum image data 305 are superimposed and displayed by the composition processing of the comparison graph-based image data 300 and the composite spectrum image data 305. do.

[Image determination example and determination result display example of this embodiment]
The image determination unit 32 detects the change point of the measurement target device 10 based on the comparison between the latest spectrum image data 304 and the initial spectrum image data 303. Further, an alarm based on the change point is output based on the graph comparison image data 306 provided by the image processing unit 31. Specifically, when the latest spectrum image data 304 and the initial spectrum image data 303 are compared and the graph line that does not appear in the initial spectrum image data 303 exceeds the threshold line of the graph comparison image data 306, "change point detection" is performed. Is output. For example, an alarm indicating "there is a frequency band exceeding the threshold value" is output.

Then, as illustrated in FIG. 3, the image display unit 33 outputs and displays an image 307 formed by attaching an alarm "there is a frequency exceeding the threshold value" based on the change point to the graph comparison image data 306. The image 307 is attached to the web page of the Web browser accessed by the user, which is output and displayed on the display unit of the user's terminal (personal computer, mobile information terminal, etc.) as one aspect of the viewing unit 4. Is displayed.

Further, as an aspect of the message information, the e-mail 308 exemplified in FIG. 3 is transmitted to the user's terminal. The e-mail 308 has the contents in which the graph comparison image data 306 is attached as an attached file.

[Effect of this embodiment]
According to the above change point detection system 1, the analog signal data indicating the state of the measurement target device 10 is converted into the digital signal data, the digital signal data is further fast Fourier transformed, and further, the graph image data. By converting to, the data indicating the state is significantly reduced in capacity. Therefore, instead of the conventional large-capacity numerical data, a small-capacity image data is wirelessly transmitted to the change point detection server 3, so that the measurement target device 10 is an object of condition monitoring even on a low-speed and inexpensive line. The change point of the state can be detected. Therefore, it is possible to detect the change point of the object at low cost online.

In particular, in the present embodiment, the user can view the diagnosis result of the state of the object via a network such as the Internet, and can receive an alarm based on the state by e-mail and view the diagnosis result. Immediate response to abnormalities in the object. Further, in the comparative graph-based image data 300 output as the diagnosis result of the present embodiment, the latest spectrum image data 304 and the initial spectrum image data 303 are displayed in a contrasted state, so that the measurement target device 10 is an object. It is possible to identify the change point of the state of.

Further, since the fast Fourier transform with a large amount of data processing is executed by the change point detection device 2 at the end on the object side, the calculation load can be distributed when a plurality of change point detection devices 2 are used. The calculation load of the change point detection server 3 can be reduced.

[Other aspects of the present invention]
As another aspect of the present invention, there is a change point detection program that causes a computer to function as either the change point detection device 2 or the change point detection server 3. This change point detection program can be provided via a well-known computer-readable recording medium or a network such as the Internet.

The present invention is not limited to the above embodiments, and can be implemented in various embodiments within the scope of the claims of the present invention.

1 ... Change point detection system 10 ... Equipment to be measured (object)
2 ... Change point detection device, 21 ... AD conversion unit (conversion unit), 22 ... Image generation unit, 23 ... Wireless communication unit (communication unit)
3 ... Change point detection server, 30 ... Image file storage unit (storage unit), 31 ... Image processing unit, 32 ... Image judgment unit, 33 ... Image display unit 4 ... Viewing unit

Claims (6)

It is a change point detection server that detects the change point of the state of the object.
Initial graph image data and latest graph image data obtained by high-speed Fourier transformation showing the initial and latest states of the object received via the mobile phone network, initial spectral image data showing the characteristics of the initial and latest states, and initial spectral image data showing the characteristics of the initial and latest states. An image processing unit that extracts the latest spectral image data, and
An image determination unit that detects a change point of the object based on a comparison between the latest spectral image data and the initial spectral image data, and an image determination unit .
An image display unit that superimposes and displays the latest spectral image data and the initial spectral image data.
Equipped with
The image processing unit
By image analysis of the latest graph image data, the graph line of the latest graph image data is extracted and extracted as the latest spectral image data.
By image analysis of the initial graph image data, the graph line of the initial graph image data is extracted and extracted as the initial spectrum image data.
By combining the latest spectrum image data and the initial spectrum image data, a composite spectrum image data in which the latest spectrum image data and the initial spectrum image data are superimposed and displayed is created.
The comparison graph-based image data and the comparison graph-based image data are obtained by combining the comparison graph-based image data consisting of the image data indicating the threshold line of the alarm based on the comparison between the latest spectrum image data and the initial spectrum image data and the composite spectrum image data. Creating graph comparison image data that is superimposed and displayed with composite spectrum image data
A change point detection server featuring. The change point detection server according to claim 1 , wherein the image display unit displays an alarm based on the change point on the superimposed display image. The change point detection server according to claim 2 , wherein the image display unit attaches an image of the superimposed display on which the alarm is displayed to a web page. The change point detection server according to claim 2 , wherein the image display unit outputs message information based on the alarm. The change point detection server according to any one of claims 1 to 4 , further comprising a storage unit for storing the latest graph image data. A change point detection program, characterized in that the computer functions as the change point detection server according to any one of claims 1 to 5 .

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