WO2021131131A1 - Système de détection magnétique et procédé d'affichage de détection magnétique - Google Patents

Système de détection magnétique et procédé d'affichage de détection magnétique Download PDF

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Publication number
WO2021131131A1
WO2021131131A1 PCT/JP2020/029341 JP2020029341W WO2021131131A1 WO 2021131131 A1 WO2021131131 A1 WO 2021131131A1 JP 2020029341 W JP2020029341 W JP 2020029341W WO 2021131131 A1 WO2021131131 A1 WO 2021131131A1
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Prior art keywords
magnetic
display
determination result
unit
magnetic signal
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PCT/JP2020/029341
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English (en)
Japanese (ja)
Inventor
剛士 大野
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株式会社島津製作所
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Priority to JP2021566798A priority Critical patent/JP7259995B2/ja
Publication of WO2021131131A1 publication Critical patent/WO2021131131A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/30—Assessment of water resources

Definitions

  • the present invention relates to a magnetic detection system and a display method for magnetic detection.
  • the magnetic detection system described in Japanese Patent Application Laid-Open No. 2013-156225 detects a magnetic substance (detection target) passing in the vicinity of the magnetic sensor.
  • This magnetic detection system includes a magnetic sensor and a computer.
  • the magnetic sensor measures the magnetic waveform (observation data).
  • the computer includes a control unit that detects and determines a magnetic material based on observation data, and a display unit that displays a determination result by the control unit, an observation waveform, and the like. Then, when the control unit determines that the magnetic signal caused by the magnetic material is detected by determining whether or not the magnetic waveform of the observation data is the magnetic signal caused by the magnetic material, the control unit determines the magnetism caused by the magnetic material. The fact that the signal has been detected is displayed on the display unit.
  • the present invention has been made to solve the above-mentioned problems, and one object of the present invention is to confirm whether or not the signal is a magnetic signal caused by a magnetic material without constantly monitoring the determination result. It is to provide a magnetic detection system capable of enabling and a display method for magnetic detection.
  • the magnetic detection system is installed in water and is a magnetic material based on a magnetic sensor that acquires a magnetic signal and a magnetic signal acquired by the magnetic sensor.
  • a judgment unit that outputs a judgment result regarding the presence or absence of passage, a display unit that displays the judgment result output by the judgment unit, and a control unit that controls to visually display the judgment result on the display unit in chronological order.
  • the display method for magnetic detection in the second aspect of the present invention includes a step of acquiring a determination result as to whether or not a magnetic substance has passed based on a magnetic signal detected in water, and a time series of the acquired determination result. It is provided with a step of visually displaying along the line.
  • the determination results are visually displayed in chronological order. Therefore, the user can recognize how and when the determination result has changed in chronological order by visually recognizing the determination result that is visibly displayed in chronological order. .. Therefore, by visually recognizing the determination result displayed at the present time, it is possible to easily confirm whether or not the magnetic signal acquired at the past time is a signal caused by a magnetic material. As a result, unlike the case where only the judgment result at the present time is displayed, the user does not constantly monitor the judgment result in order to monitor the presence or absence of the passage of the magnetic material, and the magnetic signal caused by the magnetic material. It can be confirmed whether or not.
  • (B) is a figure for explaining the magnetic substance detection information of the 2nd stage. It is a figure for demonstrating the display which the time axis is different in the magnetic signal and the determination result by the 3rd modification of one Embodiment. It is a figure for demonstrating the example which superimposes and displays the magnetic signal and the determination result by the 4th modification of one Embodiment. It is a figure for demonstrating the display of the determination result which is not the graph display by the 5th modification of one Embodiment. It is a figure for demonstrating the display of the magnetic signal in two periods by the 6th modification of one Embodiment.
  • the magnetic detection system 100 (Overall configuration of magnetic detection system) The magnetic detection system 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 10.
  • the magnetic detection system 100 includes a plurality of magnetic sensors 1, a receiving unit 2, and a computer 3 installed in the detection area Q.
  • the magnetic detection system 100 according to the present embodiment is a system that detects the passage of the magnetic body P by detecting the magnetic signal S caused by the magnetic body P.
  • the user who monitors the passage (intrusion) of the magnetic material P can grasp the presence or absence of the passage of the magnetic material P (by visually recognizing the display unit 32) based on the determination result R output by the magnetic detection system 100. It is possible. In addition, the user can consider countermeasures depending on whether or not the magnetic material P has passed.
  • the magnetic sensor 1 is provided in, for example, a harbor. Further, the magnetic material P includes a ship, a diver (diver) and the like.
  • the magnetic sensor 1 is installed in the sea (seabed).
  • a plurality of magnetic sensors 1 are installed in the detection region Q for detecting the presence or absence of passage of the magnetic body P.
  • the magnetic sensor 1 includes, for example, a first magnetic sensor 1a, a second magnetic sensor 1b, a third magnetic sensor 1c, a fourth magnetic sensor 1d, a fifth magnetic sensor 1e, a sixth magnetic sensor 1f, a seventh magnetic sensor 1g, and the like.
  • Eighth magnetic sensor 1h is included.
  • Each of the plurality of magnetic sensors 1 is installed so as to be separated from each other, and is wiredly connected to the receiving unit 2.
  • the magnetic sensor 1 acquires a magnetic signal S caused by the passage of the magnetic body P.
  • the magnetic sensor 1 is configured to output, for example, the acquired magnetic signal S as an optical signal to a receiving unit 2 installed on land.
  • the magnetic sensor 1 is configured to output the magnetic signal S acquired by a predetermined sampling period.
  • the magnetic sensor 1 includes, for example, a fluxgate type sensor.
  • the predetermined sampling cycle is set to 0.5 seconds. The predetermined sampling period can be arbitrarily changed.
  • the receiving unit 2 is wiredly connected to the magnetic sensor 1 and receives the magnetic signal S acquired by the magnetic sensor 1. Then, the receiving unit 2 converts the received magnetic signal S, which is an optical signal, into an electric signal. Further, the receiving unit 2 is connected to the computer 3 by wire and transmits the magnetic signal S converted into an electric signal to the computer 3.
  • the computer 3 includes an operation unit 31, a display unit 32, a control unit 33, and a storage unit 34.
  • the computer 3 is, for example, a computer terminal used by a user in a land monitoring facility.
  • the operation unit 31 accepts an input operation by the user.
  • the operation unit 31 includes a pointing device such as a keyboard and a mouse, for example.
  • the display unit 32 displays the magnetic signal S acquired by the magnetic sensor 1 and the determination result R output by the determination unit 33b, which will be described later, under the control of the control unit 33. .. Further, the display unit 32 is configured to display the magnetic signal S acquired in the display target period T and the determination result R under the control of the control unit 33.
  • the display unit 32 includes, for example, a liquid crystal display. The details of the display target period T will be described later.
  • the storage unit 34 stores the magnetic signal S under the control of the control unit 33. Further, the storage unit 34 stores the measurement data D including the magnetic signal S acquired by the magnetic sensor 1. In addition to the magnetic signal S, the measurement data D includes the position information Da of the magnetic sensor 1 in the detection region Q and the time information Db about the time when the magnetic signal S is acquired. Further, the measurement data D includes the magnetic body detection information E including the determination result R indicating that the magnetic body P has passed. Further, the storage unit 34 stores various programs executed by the control unit 33, the classifier M described later, and the like. The storage unit 34 includes, for example, an HDD (Hard Disk Drive) or a non-volatile memory.
  • HDD Hard Disk Drive
  • the control unit 33 includes a preprocessing unit 33a, a determination unit 33b, a memory control unit 33c, and a display control unit 33d as functional configurations. That is, the control unit 33 functions as a preprocessing unit 33a, a determination unit 33b, a storage control unit 33c, and a display control unit 33d by executing the program.
  • the control unit 33 includes, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and the like.
  • the preprocessing unit 33a is configured to perform preprocessing of the magnetic signal S. That is, the preprocessing unit 33a removes the high frequency noise component in the acquired magnetic signal S.
  • the preprocessing unit 33a includes, for example, a low-pass filter.
  • the determination unit 33b outputs a determination result R as to whether or not the magnetic body P has passed, based on the magnetic signal S acquired by the magnetic sensor 1. Specifically, the determination unit 33b is generated by machine learning with respect to the magnetic waveform generated based on the magnetic signal S acquired by the magnetic sensor 1 in a predetermined sampling period (every 0.5 seconds). The determination result R is output by performing the determination using the discriminator M which is the trained model.
  • the magnetic signal S acquired by the magnetic sensor 1 includes a signal caused by the passage of the magnetic body P and constant noise (noise).
  • the magnetic signal S shown in FIG. 3 is an example of a magnetic signal S having only stationary noise.
  • the magnetic signal S shown in FIG. 4 is an example including the magnetic signal S caused by the passage of the magnetic body P.
  • the magnetic signal S caused by the magnetic material P has a waveform having a characteristic peak (S ⁇ in FIG. 4).
  • the horizontal axis is time and the vertical axis is signal strength.
  • the vertical axis in the graph display is configured to have a variable scale according to the signal strength. That is, the scale of the vertical axis is varied so that the maximum value and the minimum value of the displayed signal strength are located at the upper end and the lower end of the graph, respectively.
  • the classifier M is stored in the storage unit 34. Then, as shown in FIG. 5, the classifier M is learned by using the simulation waveform created by simulating the magnetic signal S caused by the magnetic body P and the actually measured noise waveform. That is, the waveform obtained by superimposing the noise waveform on the simulation waveform is used for learning as teacher input data. Further, the simulation waveform is comprehensively created by setting a plurality of parameters to various values. The plurality of parameters include, for example, the magnetic direction, traveling direction, velocity, underwater depth, and lateral distance (horizontal distance) of the magnetic body P. Then, the classifier M is generated by machine learning using a plurality of simulation waveforms as teacher input data and the presence or absence of a magnetic material P corresponding to the teacher input data as teacher output data. As a method of learning the classifier M, for example, a neural network, a support vector machine, or the like is used.
  • the determination unit 33b is configured to output the determination result R based on the magnetic signal S acquired by the magnetic sensor 1 in a preset determination period. Specifically, the determination result R is output based on the magnetic signal S acquired within 12 minutes, which is a preset determination period. Further, the determination unit 33b obtains a magnetic waveform generated based on the magnetic signal S acquired from the time when the magnetic signal S is acquired to the time when it goes back 12 minutes every 0.5 seconds when the magnetic signal S is acquired. As an input, the discriminator M is used to output the determination result R. The determination period can be changed arbitrarily.
  • the determination unit 33b outputs a numerical value indicating the accuracy of the passage of the magnetic material P as the determination result R.
  • the determination result R is represented by a numerical value between 0 and 1.
  • the determination result R means that the closer the magnetic signal S is to 1, the higher the possibility that the magnetic signal S is the magnetic signal S caused by the passage of the magnetic material P.
  • the storage control unit 33c controls the storage of information in the storage unit 34.
  • the storage control unit 33c stores the acquired magnetic signal S and the magnetic material detection information E including the determination result R indicating that the magnetic material P has passed in the storage unit 34.
  • the magnetic substance detection information E is information indicating that the magnetic substance P has passed.
  • a predetermined threshold value for example, 0.9
  • the storage control unit 33c allows the magnetic material P to pass through. It is highly probable that the magnetic material detection information E including the determination result R indicating that the magnetic material P has passed is stored in the storage unit 34.
  • the magnetic body detection information E is included in the measurement data D and stored together with the magnetic signal S, the position information Da, and the time information Db.
  • the predetermined threshold value can be changed arbitrarily.
  • the display control unit 33d controls the display of the display unit 32.
  • the display control unit 33d displays the magnetic signal S on the display unit 32 as shown in FIGS. 3 and 4.
  • the display control unit 33d displays the determination result R on the display unit 32 so as to be visible in chronological order.
  • the display control unit 33d can visually recognize not only the determination result R output by the determination unit 33b but also the magnetic signal S acquired by the magnetic sensor 1 in chronological order. It is configured to display in.
  • the display control unit 33d makes each of the magnetic signal S and the determination result R visible in time series in the display target period T along the common time axis. It is displayed on 32.
  • the display control unit 33d arranges each of the magnetic signal S and the determination result R vertically and vertically in a time-series manner by displaying a graph along the common time axis with the horizontal axis as the common time axis. indicate. Further, for example, each time the display control unit 33d acquires the magnetic signal S, the display control unit 33d outputs the magnetic signal S based on the acquired magnetic signal S from the time when the magnetic signal S is acquired to the time when the determination period is 12 minutes back. The determination result R is acquired. Then, in the display target period T, the display control unit 33d updates each of the acquired magnetic signal S and the determination result R each time the magnetic signal S is acquired so that the display unit can be visually recognized in chronological order. It is configured to be displayed on 32.
  • time series as used herein is described as meaning a broad concept including not only those acquired at regular intervals but also those acquired at non-constant intervals.
  • the display control unit 33d acquires the magnetic signal S every 0.5 seconds. Then, each time the display control unit 33d acquires the magnetic signal S, the display control unit 33d acquires the determination result R output based on the magnetic signal S from the time of acquisition to the time of going back 12 minutes. That is, the display control unit 33d acquires a new magnetic signal S and a new determination result R every 0.5 seconds. Then, the display control unit 33d graphs the acquired magnetic signal S and determination result R with the horizontal axis as the time axis and the vertical axis as the signal strength and determination result R (numerical value of 0 or more and 1 or less) of the magnetic signal S. indicate.
  • the display control unit 33d displays the right end of the graph display as the latest magnetic signal S and the numerical value of the determination result R. That is, the display control unit 33d was acquired within a predetermined display target period T (for example, 30 minutes) while updating the display every 0.5 seconds without changing the length of the display target period T.
  • the magnetic signal S and the determination result R are displayed on the display unit 32.
  • the display control unit 33d displays the graph of the magnetic signal S on the upper side and displays the graph of the determination result R side by side on the lower side.
  • the display control unit 33d sets the horizontal axis (time axis) of the graph of the magnetic signal S and the graph of the determination result R as a common time axis in a common display target period T (time of a common length).
  • the magnetic signal S and the determination result R are displayed side by side.
  • the display control unit 33d is configured to change the display target period T based on the input operation to the operation unit 31.
  • the display control unit 33d changes the length of the display target period T based on the input operation on the keyboard included in the operation unit 31. Specifically, when the display target period T is 30 minutes and an input operation for changing the display target period T to 60 minutes is accepted, the display control unit 33d sets the display target period T to 60 minutes. change. That is, based on the input operation for changing the display target period T to 60 minutes, the display control unit 33d displays the magnetic signal S and the determination result R from the current time point to the time point 60 minutes before. Display on. Similarly, as shown in FIG. 7, when the display target period T is 30 minutes and the input operation for changing the display target period T to 15 minutes is accepted, the display control unit 33d displays. Change the target period T to 15 minutes. Further, for example, the length of the display target period T may be changed by a drag operation on the mouse included in the operation unit 31 or a rotation operation of the wheel button.
  • the display control unit 33d is configured so that the start time point and the end time point of the display target period T can be arbitrarily changed based on the input operation to the operation unit 31.
  • the display control unit 33d operates in the display target period T while the magnetic signal S and the determination result R acquired in the display target period T are displayed on the display unit 32. It is configured to control the period based on the input operation to the unit 31 to be enlarged and displayed. Specifically, based on the fact that the area T ⁇ of FIG. 8 is selected by the drag operation by the mouse included in the operation unit 31, the display control unit 33d newly displays the period corresponding to the selected area T ⁇ . The display target period T is changed (enlarged display) so as to be the period T. Further, the time at the start time and the end time of the display target period T may be acquired based on the input operation on the keyboard included in the operation unit 31.
  • the display control unit 33d displays the detail button A for displaying the acquired magnetic signal S and the determination result R in detail on the display unit 32. Then, the display control unit 33d is stored in the storage unit 34 based on the click operation by the mouse included in the operation unit 31 with respect to the area of the detail button A displayed on the display unit 32. The entire magnetic signal S acquired so far is displayed. For example, when the storage control unit 33c is configured to store one measurement data D in the storage unit 34 every 24 hours, the display control unit 33d may perform the display control unit 33d based on the click operation on the detail button A. The magnetic signal S acquired during 24 hours and the determination result R corresponding to the magnetic signal S acquired during 24 hours are displayed. In the entire display (detailed display) of the magnetic signal S, the display target period T is not limited to 24 hours. For example, the magnetic signal S acquired during the three months may be visually displayed in a list.
  • the display control unit 33d stores the determination result R stored in the storage unit 34.
  • the magnetic substance detection information E including the above is visually displayed on the display unit 32 in chronological order. Specifically, as shown in FIG. 9, the display control unit 33d detects the magnetic substance at the time when the magnetic substance detection information E is acquired on the time axis common to the acquired overall magnetic signal S and the determination result R. It is visibly displayed as the information button E1.
  • the display control unit 33d clicks (selects) based on the click operation on the area of the magnetic material detection information button E1, which is a button display indicating the time when the magnetic material detection information E displayed in chronological order is acquired. )
  • the display target period T corresponding to the magnetic substance detection information E magnetic substance detection information button E1
  • the acquired magnetic signal S and the determination result R are enlarged and displayed.
  • the display control unit 33d starts from a time point 15 minutes before the time when the selected magnetic material detection information E is acquired based on the click operation, and 15 minutes from the time point when the selected magnetic material detection information E is acquired. The 30 minutes up to the later point in time are acquired as the display target period T.
  • the display control unit 33d determines that the magnetic signal S stored in the storage unit 34 in the acquired display target period T and the determination result R corresponding to the magnetic signal S stored in the storage unit 34 in the display target period T. Each of the above is visually displayed on the display unit 32 in chronological order.
  • the display control unit 33d enlarges and displays the magnetic signal S and the determination result R from an arbitrary time point to an arbitrary time point by changing the display target period T based on the input operation to the operation unit 31. Let me.
  • the display control unit 33d indicates that the magnetic material P has passed when the determination result R output by the determination unit 33b is equal to or higher than a predetermined threshold value (for example, 0.9).
  • the magnetic substance detection information E including the determination result R is notified. That is, the display control unit 33d notifies, for example, by voice output that the value of the determination result R and the possibility of passing through the magnetic body P are high.
  • the display control unit 33d receives magnetic material detection information E.
  • the display for notifying the above and the display for the magnetic signal S and the determination result R are arranged and displayed on the display unit 32.
  • the display control unit 33d is configured to stop the display of the magnetic signal S and the determination result R when it is determined that the output of the magnetic sensor 1 is abnormal based on the magnetic signal S. Has been done. Specifically, when the signal strength of the acquired magnetic signal S is too strong, or when the signal strength of the acquired magnetic signal S is too weak, the display control unit 33d causes an output abnormality of the magnetic sensor 1. Judge that there is. When the display control unit 33d determines that the output of the magnetic sensor 1 is abnormal, the display control unit 33d stops displaying the magnetic signal S and the determination result R during the period T ⁇ when the magnetic sensor 1 is determined to have an output abnormality. Then, the display E ⁇ for notifying that the magnetic sensor 1 has an output abnormality is performed.
  • the display control unit 33d may be configured so that only the display of the determination result R is stopped and the display of the magnetic signal S is not stopped.
  • step 101 the magnetic signal S is acquired by the magnetic sensor 1 installed in water.
  • step 102 a low-pass filter is used for the acquired magnetic signal S to remove high-frequency noise components.
  • step 103 the measurement data D including the acquired magnetic signal S is stored in the storage unit 34.
  • step 104 it is determined whether or not the output of the magnetic sensor 1 is abnormal based on the acquired magnetic signal S. If it is determined that the output of the magnetic sensor 1 is abnormal, the display of the magnetic signal S and the determination result R is stopped, and the process proceeds to step 109. If it is not determined that the output of the magnetic sensor 1 is abnormal, the process proceeds to step 105.
  • step 105 the determination result R output based on the acquired magnetic signal S from the time when the magnetic signal S is acquired to the time when the determination period goes back 12 minutes is acquired.
  • step 106 the magnetic signal S and the determination result R are visually displayed on the display unit 32 in chronological order.
  • step 107 it is determined whether or not the value of the determination result R acquired in step 106 is equal to or greater than the threshold value. If it is determined that the acquired determination result R is equal to or greater than the threshold value, the process proceeds to step 108. If the acquired determination result R is smaller than the threshold value, the process proceeds to step 109.
  • step 108 the magnetic material detection information E indicating that the magnetic signal S due to the passage of the magnetic material P is likely to be acquired is acquired. Then, the magnetic substance detection information E is included in the measurement data D and stored. Further, a display for notifying the magnetic substance detection information E is displayed on the display unit 32. Then, the process proceeds to step 109.
  • step 109 it is determined whether or not the input operation for changing the display target period T has been accepted. If it is determined that the input operation for changing the display target period T has been accepted, the process proceeds to step 110. If it is not determined that the input operation for changing the display target period T has been accepted, the process proceeds to step 111.
  • step 110 the display target period T is changed based on the input operation to the operation unit 31. Then, the process proceeds to step 111.
  • step 111 it is determined whether or not the selection operation for selecting the magnetic substance detection information E stored in the storage unit 34 has been accepted. If it is determined that the selection operation for selecting the stored magnetic substance detection information E has been accepted, the process proceeds to step 112. If it is not determined that the selection operation for selecting the stored magnetic substance detection information E has been accepted, the process proceeds to step 113.
  • step 112 the display target period T is changed to the display target period T including at least one before and after the time when the selected magnetic substance detection information E is acquired, based on the selection operation. Then, it corresponds to the stored magnetic signal S in the display target period T including at least one of the time before and after the selected magnetic substance detection information E and the stored magnetic signal S in the display target period T.
  • Each of the determination result R to be performed is visually displayed on the display unit 32 in chronological order. Then, the process proceeds to step 113.
  • step 113 a new magnetic signal S is acquired from the acquired magnetic signal S after a predetermined sampling period (0.5 seconds) has elapsed. Then, the process returns to step 103.
  • the determination result R is visually displayed in chronological order. Therefore, the user recognizes how and when the determination result R has changed in chronological order by visually recognizing the determination result R that is visibly displayed in chronological order. Can be done. Therefore, by visually recognizing the determination result R displayed at the present time, it is possible to easily confirm whether or not the magnetic signal S acquired at the past time is a signal caused by the magnetic body P. As a result, unlike the case where only the judgment result R at the present time is displayed, the user does not constantly monitor the judgment result R in order to monitor the presence or absence of the passage of the magnetic body P, but instead displays the judgment result R on the magnetic body P. It can be confirmed whether or not the magnetic signal S is the cause.
  • the display control unit 33d displays not only the determination result R output by the determination unit 33b but also the magnetic signal S acquired by the magnetic sensor 1. It is configured to be visually displayed on the display unit 32 along the series. With this configuration, not only the determination result R but also the magnetic signal S can be confirmed retroactively. Therefore, when confirming what kind of magnetic signal S the determination result R acquired in the past was output by, the magnetic signal S output in the past can be easily viewed by visually recognizing the display unit 32. You can check. As a result, the user visually recognizes what kind of magnetic signal S (magnetic waveform) the magnetic signal S determined by the determination unit 33b to be the magnetic signal S caused by the magnetic body P in the past is the display unit 32. This can be easily confirmed.
  • magnetic signal S magnetic waveform
  • the display unit 32 displays the magnetic signal S acquired in the display target period T and the determination result R under the control of the display control unit 33d (control unit 33).
  • the display control unit 33d (control unit 33) visually displays each of the magnetic signal S and the determination result R in a display target period T along a common time axis in chronological order. It is configured to control the display on the unit 32.
  • the magnetic signal S and the determination result R are displayed along a common time axis, so that the user can set the time when the magnetic signal S is acquired and the time when the determination result R is acquired. , Can be easily compared. Therefore, the acquired determination result R and the magnetic signal S acquired at the time when the determination result R is output can be easily compared retroactively.
  • the determination result R is a numerical value indicating the accuracy of the presence or absence of the passage of the magnetic body P
  • the display control unit 33d (control unit 33) is the determination result as the magnetic signal S.
  • Each of R and R is configured to be controlled to be visually displayed on the display unit 32 in chronological order by displaying a graph along a common time axis.
  • the display unit 32 can visually recognize the magnitude of the determination result R (accuracy) by the determination unit 33b as compared with the case where the determination result R is displayed on the display unit 32 by numerical values and characters. It can be recognized more easily. Therefore, the information about whether or not the magnetic material P has passed can be more easily recognized in chronological order.
  • the display control unit 33d (control unit 33) visually recognizes each of the magnetic signal S and the determination result R along the time series with the horizontal axis as the common time axis. It is configured to control the display unit 32 to display the images side by side. With this configuration, it is possible to easily compare the display of the magnetic signals S and the display of the determination result R, which are displayed side by side. Therefore, the magnetic signal S and the determination result R can be easily compared and confirmed in chronological order.
  • the determination unit 33b determines whether or not the magnetic body P has passed during the determination period based on the magnetic signal S acquired by the magnetic sensor 1 during the determination period set in advance. It is configured to output the determination result R, and each time the display control unit 33d (control unit 33) acquires the magnetic signal S, it is acquired from the time when the magnetic signal S is acquired to the time when the determination period goes back.
  • the determination result R output based on the magnetic signal S is acquired, and each of the magnetic signal S acquired in the display target period T and the determination result R is updated every time the magnetic signal S is acquired. It is configured to be visually displayed on the display unit 32 in chronological order.
  • the determination unit 33b determines whether or not the magnetic body P has passed in the determination period based on the magnetic signal S acquired by the magnetic sensor 1 in the determination period set in advance. It is configured to output the determination result R.
  • the display control unit 33d detects the magnetic body including the acquired magnetic signal S and the determination result R indicating that the magnetic body P has passed.
  • the information E is stored in the storage unit 34, and the magnetic signal S stored in the storage unit 34 in the display target period T including at least one of the time before and after the time when the magnetic substance detection information E is acquired is displayed.
  • Each of the determination result R corresponding to the stored magnetic signal S in the target period T is configured to be visually displayed on the display unit 32 in chronological order. With this configuration, it is possible to easily refer to only the time when the magnetic substance detection information E is acquired from the determination result R output at the past time.
  • the magnetic signal S in the display target period T including at least one of the time before and after the magnetic substance detection information E is acquired can be easily visually recognized, the magnetic signal detection information E in the past period can be easily recognized. , The magnetic signal S acquired when the magnetic substance detection information E is acquired can be easily confirmed. As a result, even when the magnetic signal S stored in the storage unit 34 is a huge amount of information, the magnetic signal S for which the magnetic substance detection information E has been acquired can be easily extracted, so that monitoring over a long period of time can be performed. The work load when analyzing the data can be reduced.
  • the operation unit 31 that accepts the input operation by the user is further provided, and the display control unit 33d (control unit 33) is displayed in the display target period T based on the input operation to the operation unit 31.
  • the display control unit 33d (control unit 33) is displayed in the display target period T based on the input operation to the operation unit 31.
  • the display target period T can be easily changed to a user's desired period. Therefore, since the length and the time point of the display target period T can be easily changed, a desired period can be easily displayed from the acquired magnetic signal S and the determination result R.
  • the display control unit 33d (control unit 33) is in a state where the magnetic signal S and the determination result R acquired in the display target period T are displayed on the display unit 32. It is configured to control to enlarge and display the period based on the input operation to the operation unit 31 in the display target period T.
  • the portion of the display for the magnetic signal S and the display for the determination result R displayed on the display unit 32 that is desired to be referred to in more detail can be easily enlarged. Therefore, when analyzing the acquired magnetic signal S and the determination result R, the details can be referred to more easily.
  • the determination result R is a numerical value indicating the accuracy of the presence or absence of passage of the magnetic material P
  • the display control unit 33d (control unit 33) is output by the determination unit 33b.
  • the determination result R is equal to or higher than a predetermined threshold value
  • the magnetic substance detection information E including the determination result R indicating that the magnetic substance P has passed is notified, and the magnetic substance detection information E is provided.
  • the display for notifying and the display for the determination result R are configured to be displayed side by side on the display unit 32. With this configuration, when there is a high possibility that the magnetic body P has passed, the passage of the magnetic body P can be easily recognized. Therefore, it is possible to prevent the user from overlooking the acquisition of the determination result R, which is considered to have a high possibility of passing through the magnetic material P.
  • the display control unit 33d stops displaying the determination result R when it determines that the output of the magnetic sensor 1 is abnormal based on the magnetic signal S. It is configured to let you. With this configuration, it is possible to suppress the display of an inaccurate display on the display unit 32 when an abnormality occurs in the magnetic sensor 1. Therefore, when an abnormality occurs in the magnetic sensor 1, it is possible to prevent the user from making an erroneous judgment due to an erroneous display.
  • the display method for magnetic detection of the present embodiment can obtain the following effects.
  • the determination result R is visually displayed in chronological order by configuring as described above. Therefore, by visually recognizing the determination result R that is visibly displayed in chronological order, it is possible to recognize how and when the determination result R has changed in chronological order.
  • the display for magnetic detection can be performed as described above. Therefore, by visually recognizing the determination result R displayed at the present time, it is possible to easily confirm whether or not the magnetic signal S acquired at the past time is a signal caused by the magnetic body P. Can display for magnetic detection. As a result, unlike the case where only the judgment result R at the present time is displayed, in order to monitor the presence or absence of the passage of the magnetic body P, the magnetism caused by the magnetic body P is not constantly monitored. It is possible to provide a display method for magnetic detection capable of confirming whether or not it is a signal S.
  • step 106 which further includes step 101 for acquiring the magnetic signal S and visually displays the determination result R in chronological order
  • step 101 for acquiring the magnetic signal S and visually displays the determination result R in chronological order not only the determination result R but also the magnetic signal S is displayed.
  • the signal S is also step 106, which is visually displayed in chronological order.
  • step 106 not only the determination result R but also the magnetic signal S can be confirmed retroactively. Therefore, when confirming what kind of magnetic signal S the determination result R acquired in the past was output by, it can be easily confirmed by visually recognizing the magnetic signal S output in the past. ..
  • the user visually recognizes what kind of magnetic signal S (magnetic waveform) the magnetic signal S determined by the determination unit 33b to be the magnetic signal S caused by the magnetic body P in the past is the display unit 32. This can be easily confirmed.
  • the control unit 33 of the computer 3 used by the user includes the determination unit 33b, but the present invention is not limited to this.
  • the computer 203 can communicate with the database 204 built on the cloud (cloud computing) via a network N such as the Internet. It may be configured. That is, the computer 203 transmits the acquired magnetic signal S to the determination unit 233b included in the database 204 constructed on the cloud via the network N. Then, the determination unit 233b outputs the determination result R using the classifier M stored in the database 204 based on the transmitted magnetic signal S.
  • the control unit 233 (display control unit) of the computer 203 acquires the determination result R output by the determination unit 233b, the magnetic signal S acquired by the magnetic sensor 1, and the determination result R output by the determination unit 233b. May be displayed on the display unit so as to be visible in chronological order.
  • the display control unit when the determination result R is equal to or higher than a predetermined threshold value (0.9), the magnetic body detection information E is acquired and the user is notified of the detection of the magnetic body P.
  • a predetermined threshold value for example, 0.7 and 0.9
  • the display control unit is configured to display the above.
  • the display control unit is configured to display the possibility that the magnetic material P has been detected in two stages. You may. Specifically, as shown in FIG. 13A, when the determination result R is 0.7 or more and less than 0.9, the magnetic substance detection information Ea of the first stage is displayed. Then, as shown in FIG. 13B, when the determination result R is 0.9 or more, the display control unit may be configured to display the magnetic substance detection information Eb in the second stage.
  • the display unit 32 is configured to display the magnetic signal S acquired in the display target period T and the determination result R under the control of the display control unit 33d (control unit 33).
  • the display control unit 33d controls the display unit 32 to visually display each of the magnetic signal S and the determination result R in the display target period T along the common time axis in chronological order.
  • the display control unit may be configured so that the magnetic signal S and the determination result R are displayed so as not to be displayed along a common time axis. That is, as shown in FIG.
  • the display control unit may be configured in. For example, the determined determination result selected by selecting a part of the displayed determination result R (for example, 40 minutes) as the display target period T while displaying the determination result R for 24 hours.
  • the display control unit may be configured to display the magnetic signal S acquired in the display target period T corresponding to a part of the region of R.
  • the display control unit (control unit) is configured to control the display of each of the magnetic signal and the determination result side by side, but the present invention is limited to this. I can't.
  • the display control unit may be configured to control the display by superimposing the magnetic signal and the determination result.
  • the determination result is a numerical value indicating the accuracy of the presence or absence of passage of the magnetic material
  • the display control unit sets each of the magnetic signal and the determination result on a common time axis.
  • control is performed so as to visually display on the display unit in chronological order by displaying a graph along the line
  • the present invention is not limited to this.
  • the display control unit may be configured to visually display the accuracy of the presence or absence of passage of the magnetic material by characters, symbols, or the like instead of the graph.
  • the display control unit is configured so that the time when the determination result of a value larger than a predetermined threshold value is acquired is visually displayed along the time axis common to the magnetic signal displayed in the graph. You may. Further, the determination result may be displayed numerically. Further, the determination result may be displayed in an identifiable manner by color coding.
  • the display control unit (control unit) visually displays each of the magnetic signal acquired in one common display target period T and the determination result on the display unit in chronological order.
  • the present invention is not limited to this.
  • the display control unit may be configured to display the magnetic signal S1 and the magnetic signal S2 in two periods. Specifically, the entire magnetic signal S1 stored in the storage unit and the magnetic signal S2 acquired in the set display target period T are visually displayed together with the determination result R in chronological order.
  • the display control unit may be configured as described above. Further, the display target period T may be set by selecting a predetermined period from the entire magnetic signal S1 based on the input operation to the operation unit.
  • the display on the display unit is displayed to the user.
  • the present invention is not limited to this.
  • the user may be notified by voice of the detection of the magnetic material. ..
  • the detection of the magnetic material may be notified to the terminal carried by the user by sending an e-mail or the like.
  • the display control unit displays not only the determination result output by the determination unit but also the magnetic signal acquired by the magnetic sensor on the display unit so as to be visible in chronological order.
  • the present invention is not limited to this.
  • the magnetic signal acquired by the magnetic sensor does not have to be visibly displayed in chronological order. That is, only the magnetic signal at the time when the magnetic signal is acquired may be displayed on the display unit. Further, the acquired magnetic signal may not be displayed, and only the determination result may be displayed in chronological order.
  • the display control unit displays each of the magnetic signal and the determination result vertically and vertically on the display unit so as to be visible in chronological order with the horizontal axis as a common time axis.
  • the vertical axis may be displayed side by side as a common time axis. Further, it may be displayed side by side instead of vertically.
  • the determination unit is configured to output a determination result as to whether or not the magnetic material has passed during the determination period, based on the magnetic signal acquired by the magnetic sensor in the determination period set in advance.
  • the display control unit acquires a magnetic signal
  • the display control unit acquires a determination result output based on the acquired magnetic signal from the time when the magnetic signal is acquired to the time when the determination period goes back.
  • each of the magnetic signal acquired in the display target period and the determination result is updated every time the magnetic signal is acquired, and is configured to be visually displayed on the display unit in chronological order.
  • the present invention is not limited to this.
  • the determination may be performed based on the acquired magnetic signal each time the magnetic signal is acquired without setting a preset determination period. Further, the determination may be performed using an arbitrary period of the user as the determination period. Further, the determination result may be acquired not every time the magnetic signal is acquired but at a predetermined time interval. Further, instead of updating each time the magnetic signal is acquired, the display of the magnetic signal and the determination result may be updated at predetermined time intervals.
  • the display control unit stores the acquired magnetic signal and the magnetic material detection information including the determination result indicating that the magnetic material has passed in the storage unit.
  • only the magnetic signal may be stored without storing the magnetic substance detection information.
  • the magnetic substance detection information is stored as if the magnetic substance has passed, and the magnetic substance detection information among the acquired magnetic signals is stored. Only the magnetic signals acquired in the display target period including at least one of before and after may be stored.
  • the display control unit starts from the time 15 minutes before the time when the selected magnetic material detection information is acquired based on the click operation, and from the time when the selected magnetic material detection information is acquired.
  • An example is shown in which 30 minutes up to the time point after 15 minutes is acquired as the display target period, but the present invention is not limited to this.
  • the display control unit may be configured to acquire a predetermined period after the time when the magnetic substance detection information is acquired as the display target period. Further, the display control unit may be configured to acquire a predetermined period before the time when the magnetic substance detection information is acquired as the display target period.
  • an operation unit that accepts an input operation by the user is further provided, and the control unit is configured to change the display target period based on the input operation to the operation unit.
  • the present invention is not limited to this.
  • the magnetic signal acquired in the preset display target period and the detection result may be displayed without changing the display target period.
  • the display control unit performs an input operation to the operation unit during the display target period while the magnetic signal and the determination result acquired in the display target period are displayed on the display unit.
  • the display target period may not be enlarged and displayed. Further, it may be configured to magnify and display an arbitrary period from the magnetic signals stored in the storage unit instead of the display target period displayed on the display unit.
  • the determination result is a numerical value indicating the accuracy of the presence or absence of passage of the magnetic material
  • the display control unit has the determination result output by the determination unit equal to or higher than a predetermined threshold value.
  • the magnetic substance detection information including the determination result indicating that the magnetic substance has passed is notified, and the display for notifying the magnetic substance detection information and the display about the determination result are displayed.
  • the display is arranged side by side on the display unit, the present invention is not limited to this.
  • the magnetic body detection information may not be notified. Further, it is possible to display only the magnetic substance detection information and not to notify the voice or the like.
  • the display control unit (control unit) is configured to stop the display of the determination result when it is determined that the output of the magnetic sensor is abnormal based on the magnetic signal.
  • the present invention is not limited to this. For example, even when it is determined that the output of the magnetic sensor is abnormal, the display of the determination result may not be stopped.
  • a trained model generated by machine learning is used as a discriminator
  • the present invention is not limited to this.
  • an algorithm that makes a judgment based on a rule may be used as a discriminator.
  • magnetic sensors may be installed in the sea (seabed)
  • the present invention is not limited to this.
  • magnetic sensors may be installed in coastal areas such as rivers and lakes.
  • a plurality of magnetic sensors are installed so as to surround the outer peripheral portion of the detection region, but the present invention is not limited to this.
  • a plurality of magnetic sensors may be installed over the entire detection area.
  • a magnetic sensor that is installed underwater and acquires a magnetic signal, A determination unit that outputs a determination result as to whether or not a magnetic material has passed based on the magnetic signal acquired by the magnetic sensor, and a determination unit.
  • a display unit that displays the determination result output by the determination unit, and a display unit that displays the determination result.
  • a magnetic detection system including a control unit that controls to visually display the determination result on the display unit in chronological order.
  • the control unit is configured to visually display not only the determination result output by the determination unit but also the magnetic signal acquired by the magnetic sensor on the display unit in chronological order.
  • the magnetic detection system according to item 1.
  • the display unit is configured to display the magnetic signal acquired during the display target period and the determination result under the control of the control unit.
  • the control unit is configured to control to visually display each of the magnetic signal and the determination result on the display unit in a time series during the display target period along a common time axis.
  • the determination result is a numerical value indicating the accuracy of the presence or absence of passage of the magnetic material.
  • the control unit is configured to control the magnetic signal and the determination result to be visually displayed on the display unit in chronological order by displaying a graph along a common time axis.
  • the control unit is configured to control the magnetic signal and the determination result to be displayed vertically side by side on the display unit so as to be visible in chronological order with the horizontal axis as a common time axis.
  • the magnetic detection system according to item 3 or 4.
  • the determination unit is configured to output the determination result regarding the presence or absence of passage of the magnetic material in the determination period based on the magnetic signal acquired by the magnetic sensor in the determination period set in advance. Ori, Each time the control unit acquires the magnetic signal, the control unit acquires the determination result output based on the magnetic signal acquired from the time when the magnetic signal is acquired to the time when the determination period goes back, and also acquires the determination result. Each of the magnetic signal and the determination result acquired in the display target period is updated every time the magnetic signal is acquired, and is configured to be visually displayed on the display unit in chronological order.
  • the magnetic detection system according to any one of items 3 to 5.
  • the control unit stores the acquired magnetic signal and magnetic substance detection information including the determination result indicating that the magnetic substance has passed in the storage unit, and acquires the magnetic substance detection information.
  • Each of the magnetic signal stored in the storage unit in the display target period including at least one of before and after the time point and the determination result corresponding to the stored magnetic signal in the display target period are obtained.
  • the magnetic detection system according to any one of items 3 to 6, which is configured to be visually displayed on the display unit in chronological order.
  • the magnetic detection system according to any one of items 3 to 7, wherein the control unit is configured to change the display target period based on an input operation to the operation unit.
  • the control unit extends the period based on the input operation to the operation unit in the display target period in the state where the magnetic signal acquired in the display target period and the determination result are displayed on the display unit.
  • the magnetic detection system according to item 8, which is configured to control display.
  • the determination result is a numerical value indicating the accuracy of the presence or absence of passage of the magnetic material.
  • the control unit obtains magnetic substance detection information including the determination result indicating that the magnetic substance has passed.
  • the display for notifying the magnetic substance detection information and the display for the determination result are displayed side by side on the display unit. The magnetic detection system described.
  • (Item 11) Item 1 to any one of items 1 to 10, wherein the control unit is configured to stop displaying the determination result when the output abnormality of the magnetic sensor is determined based on the magnetic signal.
  • Step 13 Further including the step of acquiring the magnetic signal, The magnetic detection according to item 12, wherein the step of visually displaying the determination result in chronological order is a step of visually displaying not only the determination result but also the magnetic signal in chronological order. Display method for.
  • Magnetic sensor 31 Operation unit 32
  • Display unit 33 233 Control unit 33b, 233b Judgment unit 33d
  • Display control unit (control unit) 34 Storage 100, 200 Magnetic detection system

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Le présent système de détection magnétique (100) est pourvu de ce qui suit : un capteur magnétique (1) qui est disposé dans l'eau et acquiert un signal magnétique (S) ; une unité de détermination qui délivre un résultat de détermination si un corps magnétique (P) a traversé, sur la base du signal magnétique (S) acquis par le capteur magnétique (1) ; une unité d'affichage (32) qui affiche le résultat de détermination délivré par l'unité de détermination ; et une unité de commande d'affichage qui effectue une commande pour afficher le résultat de détermination le long d'une série chronologique dans l'unité d'affichage (32) d'une manière visuellement reconnaissable.
PCT/JP2020/029341 2019-12-25 2020-07-30 Système de détection magnétique et procédé d'affichage de détection magnétique WO2021131131A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08220211A (ja) * 1995-02-08 1996-08-30 Tech Res & Dev Inst Of Japan Def Agency 船舶監視装置
JP2010216972A (ja) * 2009-03-17 2010-09-30 Shimadzu Corp 磁気検出システム
JP2013156225A (ja) * 2012-01-31 2013-08-15 Shimadzu Corp 磁気検知システム
JP2018132918A (ja) * 2017-02-15 2018-08-23 日本電信電話株式会社 データ分析装置及びデータ分析方法
JP2018205172A (ja) * 2017-06-06 2018-12-27 横河電機株式会社 波形表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08220211A (ja) * 1995-02-08 1996-08-30 Tech Res & Dev Inst Of Japan Def Agency 船舶監視装置
JP2010216972A (ja) * 2009-03-17 2010-09-30 Shimadzu Corp 磁気検出システム
JP2013156225A (ja) * 2012-01-31 2013-08-15 Shimadzu Corp 磁気検知システム
JP2018132918A (ja) * 2017-02-15 2018-08-23 日本電信電話株式会社 データ分析装置及びデータ分析方法
JP2018205172A (ja) * 2017-06-06 2018-12-27 横河電機株式会社 波形表示装置

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