JP2013096753A - Fluctuation feature estimation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluctuation feature estimation apparatus capable of easily and highly accurately estimating features of fluctuation of a building body.SOLUTION: The fluctuation feature estimation apparatus includes: a pendulum 36 included in a building body 16 and fixed on a lower surface of the building body 16; a measurement transmitter 38 arranged on a foundation 14 to measure intensity of a magnetic field of the pendulum 36; and a CPU 34A for deriving fluctuation feature information indicating features of fluctuation of the building body 16 on the basis of a measurement result of the measurement transmitter 38.

Description

  The present invention relates to a swing characteristic estimation device applied to a building having a seismic isolation device.

  In a building having a seismic isolation device, for example, when the building shakes greatly due to an earthquake or the like, a large relative deformation occurs between the foundation of the building and the building main body on the seismic isolation device. For buildings with seismic isolation devices, it is recommended to record the deformation state of the building, and a mount is placed on the foundation of the building in contact with the ground, and the trajectory at the time of the earthquake A drawing method (ruled writing method) is generally used.

  In addition to the ruled marking method, for example, Patent Document 1 discloses an invention for measuring a horizontal swing amount of a building body included in a building having a seismic isolation device at the time of an earthquake using a slide member. . According to the present invention, the amount of swing in the horizontal direction is recorded by sliding the slide member as the sliding portion slides horizontally above or below the non-sliding portion when an earthquake occurs. Since the slide member stops at that position even after the earthquake has stopped, it is possible to check on the scale how much the slide member slides.

JP 2006-38804 A

  However, in the case of the ruled marking method, after the trace is drawn on the mount, the mount must be replaced with a new one, and the swing amount must be calculated from the trace drawn on the mount. In the technique described in Patent Document 1, after measuring the swing amount, the apparatus set including the slide member has to be replaced, and the swing amount must be read from the scale. Thus, when estimating the amount of rocking of the building body included in the building having the seismic isolation device by the conventional method, there is a problem that it is difficult to estimate with high accuracy although it takes time.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a swing characteristic estimation device that can easily and accurately estimate the swing characteristics of a building body. .

  In order to achieve the above object, the swing feature estimation device according to claim 1 is a magnetic field that generates a magnetic field provided on one of the building body supported by a base isolation device installed on the foundation and the foundation. A generator, a measuring means provided on the other of the building main body and the foundation, for measuring the strength of the magnetic field generated by the magnetic field generator, and a swing of the building main body based on the measurement result of the measuring means. And derivation means for deriving oscillating feature information indicating the feature of the motion.

  In the swing feature estimation apparatus according to claim 1, as in the invention according to claim 2, the swing feature information is information corresponding to information for specifying a swing range of the magnetic field generator. It was.

  On the other hand, in order to achieve the above object, the swing feature estimation device according to claim 3 generates a magnetic field provided on one of the building body supported by a base isolation device installed on the foundation and the foundation. A plurality of measuring means for measuring the strength of the magnetic field generated by the magnetic field generator, and a plurality of measuring means provided for the other of the building body and the foundation, respectively, And derivation means for deriving rocking feature information indicating the rocking characteristics of the building body based on the measurement result.

  According to a third aspect of the present invention, the swing characteristic estimation apparatus is configured such that the swing characteristic information is information corresponding to information for specifying a position of the magnetic field generator, as in the fourth aspect of the invention. .

  The fluctuation feature estimation device according to any one of claims 1 to 4, as in the invention according to claim 5, generates the magnetic field so as to be close to the magnetic field generator and the measurement means. And a support that supports the body.

  According to the first and third aspects of the invention, it is possible to easily and highly accurately estimate the swing characteristics of the building body as compared with the case where the present configuration is not provided.

  According to the second aspect of the present invention, the swing range of the building main body is compared with the case where the swing feature information is not configured to be information corresponding to information specifying the swing range of the magnetic field generator. The effect that it can grasp | ascertain highly accurately and easily is acquired.

  According to the fourth aspect of the present invention, the swing path of the building main body is more accurate than the case where the swing feature information is not configured to correspond to information for specifying the position of the magnetic field generator. And the effect that it can grasp | ascertain easily is acquired.

  According to the invention described in claim 5, compared with a case where the magnetic field generator and a support body that supports the magnetic field generator so as to be close to the measuring means are not provided. The effect that the strength of the magnetic field can be measured easily and accurately is obtained.

It is an elevational view showing an example of a reinforced concrete structure to which the swing feature estimation device according to the first embodiment is applied. It is a schematic block diagram which shows an example of a structure of the rocking | fluctuation feature estimation apparatus which concerns on 1st Embodiment. It is a block diagram which shows an example of a principal part structure of the electric system of the rocking | fluctuation feature estimation apparatus which concerns on 1st Embodiment. It is a schematic diagram which shows an example of the building main body rocking | fluctuation amount derivation | leading-out table memorize | stored in ROM of the estimation part which concerns on 1st Embodiment. It is a flowchart which shows the example of a different flow of the process of the rocking | fluctuation feature estimation processing program which concerns on 1st Embodiment. It is a schematic diagram which shows an example by which the rocking | swiveling amount was matched and memorize | stored for every derivation time in the secondary storage part of the estimation part which concerns on 1st Embodiment. It is a schematic diagram which shows an example of the swing-down rocking | fluctuation amount derivation | leading-out table memorize | stored in ROM of the estimation part which concerns on 1st Embodiment. It is a schematic block diagram which shows an example of a structure of the rocking | fluctuation feature estimation apparatus which concerns on 2nd Embodiment. It is a schematic plan view which shows the example of arrangement | positioning of the measurement transmission device group contained in the rocking | fluctuation feature estimation apparatus which concerns on 2nd Embodiment. It is a flowchart which shows the example of a different flow of the process of the rocking | fluctuation feature estimation processing program which concerns on 2nd Embodiment. It is explanatory drawing with which explanation of Bio Savart's law is provided. It is a schematic diagram which shows an example by which the rocking | swiveling position was matched and memorize | stored for every estimation time in the secondary storage part of the estimation part which concerns on 2nd Embodiment. It is a screen figure which shows an example of the locus | trajectory showing the rocking | fluctuation path | route of the building displayed on the display of the estimation part which concerns on 2nd Embodiment. It is a schematic block diagram which shows the modification of the rocking | fluctuation feature estimation apparatus which concerns on embodiment.

  Hereinafter, an example of an embodiment for carrying out the present invention will be described in detail with reference to the drawings. In the following embodiment, an example in which the present invention is applied to a reinforced concrete structure having a seismic isolation device is shown. However, a steel structure, a reinforced concrete structure, a CFT structure (Concrete-Filled Steel Tube: filled steel tube concrete structure) ), And a mixed structure thereof, and can be applied to structures of various structures and scales having a seismic isolation device.

  [First Embodiment]

  FIG. 1 is an elevation view showing an example of a reinforced concrete structure 10. As shown in FIG. 1, a building 10 includes a reinforced concrete foundation 14 as a lower structure provided on a ground 12, a reinforced concrete building body 16 as an upper structure, a foundation 14 and a building. And a seismic isolation device 18 inserted between the main body 16. The seismic isolation device 18 includes a plurality of laminated rubber bodies 24 containing lead plugs.

  The laminated rubber body 24 is formed by alternately laminating a plurality of disk-shaped rubber bodies and disk-shaped steel plate members, and a hole formed in the approximate center of the rubber body and the plate members in plan view. Attenuating function is exhibited by plastic deformation of a cylindrical lead plug press-fitted into the.

  The building 10 configured as described above includes a swing feature estimation device 30. The swing feature estimation device 30 is disposed between the foundation 14 and the building body 16 and has a feature of swinging the building body 16 in the horizontal direction (hereinafter referred to as “swing of the building body 16”). A measurement unit 32 that measures a physical quantity required for estimation, and an estimation unit that is installed in one room of the building 10 and estimates the swing characteristics of the building body 16 based on the measurement result of the measurement unit 32. 34.

  FIG. 2 is a schematic configuration diagram showing an example of the configuration of the swing feature estimation apparatus 30 according to the first embodiment. As shown in FIG. 2, the measurement unit 32 includes a swing-down 36 and a measurement transmission device 38. The swing-down 36 includes a cylindrical iron rod 36A formed of iron as a material and a permanent magnet 36B fixed to the tip end surface of the iron rod 36A. The base end of the iron bar 36 </ b> A is fixed to the lower surface of the building body 16. The permanent magnet 36B is formed in a tapered shape (cone shape as an example), and its bottom surface is fixed to the tip surface of the iron bar 36A, whereby the permanent magnet 36B is supported by the iron bar 36A. The measurement transmission device 38 measures the strength of the magnetic field generated by the permanent magnet 36B included in the swing-down 36 and wirelessly transmits the measurement result to a predetermined transmission destination. It is located on the upper surface of the foundation 14 so as to be located immediately below the apex of the permanent magnet 36 </ b> B in a shape and close to the tip of the swing-down 36. Note that “proximity” as used herein means that, for example, the measurement transmitter 38 is separated from the tip of the swing-down 36 at an interval at which the strength of a predetermined magnetic field can be measured. This means that a predetermined distance (for example, 80 mm) is away from the measurement surface of the device 38 to the tip of the swing-down 36.

  The estimation unit 34 is a wireless transmission destination of the measurement transmission device 38. In the first embodiment, a personal computer capable of communication (wireless communication or wired communication) with the measurement transmission device 38 is applied as the estimation unit 34. However, the present invention is not limited to this. For example, a microcomputer It may be possible to use any computer provided with a computer that can execute a swing estimation processing program to be described later.

  FIG. 3 is a block diagram illustrating an example of a main configuration of the electrical system of the estimation unit 34 and the measurement transmission device 38 according to the first embodiment. As shown in FIG. 3, the estimation unit 34 includes a CPU (Central Processing Unit) 34A that controls the operation of the estimation unit 34 as a whole, and a RAM (such as a work area when the CPU 34A executes various processing programs). Random Access Memory) 34B, ROM (Read Only Memory) 34C in which various control programs, various parameters, and the like are stored in advance, and a secondary storage unit (for example, a hard disk device as storage means used for storing various information) ) 34D, an operation unit (mouse and keyboard as an example) 34E operated to input various information, a display (liquid crystal display as an example) 34F used to display various information, a measurement transmission device 38, And a wireless communication unit 34G for controlling wireless communication operations between them. They are electrically connected to each other via an address bus, data bus, and control bus 40 such as a bus is.

  Therefore, the CPU 34A accesses the RAM 34B, ROM 34C, and secondary storage unit 34D, acquires various types of information via the operation unit 34E, displays various types of information on the display 34F, and communicates with the measurement transmission device 38 via the wireless communication unit 34G. Various information can be exchanged between them.

  On the other hand, the measurement transmission device 38 estimates the magnetic sensor 38A that measures the strength of the magnetic field generated by the permanent magnet 36B, and information (voltage signal as an example) that indicates the strength of the magnetic field measured by the magnetic sensor 38A. And a transmitter 38B that transmits to the wireless communication unit 34G every predetermined time (for example, 0.1 second) by wireless communication.

  The magnetic sensor 38A according to the first embodiment is a magnetic sensor to which an MI effect (Magnet-Impedance Effect) of an amorphous magnetic metal wire is applied. The term “amorphous” means amorphous, and unlike ordinary metals, it does not have a crystal structure, has a uniform internal structure, and exhibits ideal soft magnetic properties. The MI effect refers to a phenomenon in which the impedance when a pulse current is passed through an amorphous magnetic metal wire changes significantly due to a small external magnetic field. The magnetic sensor 38A according to the first embodiment is used as a sensor for measuring the strength of an external magnetic field (external magnetic field), and outputs a voltage signal corresponding to the impedance of the amorphous magnetic metal wire.

  By the way, in the swing feature estimation device 30 according to the first embodiment, the swing amount of the tip of the swing-down 36 is derived based on the strength of the magnetic field measured by the magnetic sensor 38A, and the derived swing-down 36 is derived. Has a rocking amount estimation function for estimating the rocking amount of the building body 16 based on the rocking amount of the tip. In order to realize this swing amount estimation function, a building body swing amount derivation table 42 shown in FIG. 4 is stored in advance in the ROM 34B of the estimation unit 34 according to the first embodiment as an example. As an example, as shown in FIG. 4, the building body swing amount derivation table 42 is based on the position of the tip of the swing-down 36 when the swing-down 36 is stationary (hereinafter referred to as “initial state”). The swinging characteristic of the swing of the building 10 uniquely determined with respect to the swinging amount of the tip of the swing-down 36 and the swinging amount of the tip of the swing-down 36, which is the amount of deviation from the reference position in the case of the position The amount of rocking of the building body 16 (an amount of deviation from the stationary position when the building body 16 is in the initial state), which is an example of the characteristic information, is associated with each other. Here, a value obtained in advance by a computer simulation or an experiment repeatedly performed under various conditions is applied as the swinging amount of the building body 16.

  Next, as an operation of the swing feature estimation apparatus 30 according to the first embodiment, an operation of the swing feature estimation apparatus 30 when executing the swing feature estimation process will be described with reference to FIG. . FIG. 5 shows a swing feature estimation processing program executed by the CPU 34A of the estimation unit 34 when an instruction to execute the swing feature estimation processing is performed via the operation unit 34E of the estimation unit 34. It is a flowchart which shows an example of the flow of a process, This program is previously memorize | stored in the predetermined area | region of secondary storage part 34D.

  In step 100 of FIG. 5, the process waits until the voltage signal transmitted from the measurement transmitter 38 is received (acquired). If a voltage signal is acquired in step 100, an affirmative determination is made and the routine proceeds to step 101. In step 101, it is determined whether or not the strength of the magnetic field measured by the magnetic sensor 38A has changed from the strength of the magnetic field measured in the initial state. If the determination is affirmative while the program ends, the process proceeds to step 102.

In step 102, the swing amount of the building body 16 is derived based on the voltage signal acquired in the processing of step 100. In this step 102, for example, by solving the inverse problem using Bio-Savart's law from the value of the magnetic field uniquely determined from the signal level of the voltage signal and the current value flowing through the magnetic sensor 38A when measuring the magnetic field strength. Then, the swing amount from the position of the tip of the swing-down 36 in the initial state is calculated. Then, the swing amount of the building main body 16 that is previously associated with the calculated swing amount on a one-to-one basis is derived from the building main body swing amount deriving table 42. Bio-Savart's law refers to the law expressed by the following equation (1). As shown in FIG. 11 as an example, the expression (1) indicates that the strength of the magnetic field (magnitude of the magnetic field) generated at a point where the current has a minute portion (here, point P) is the current value I and the minute portion. Is proportional to the sine of the angle θ formed by the current direction and the direction of the point P, and inversely proportional to the square of the distance r to the point P. In the equation (1), B represents the strength of the magnetic field, and μ ₀ / 4π represents a proportionality constant.

ΔB = (μ ₀ / 4π) · (IΔs · sin θ / r ² ) (1)

  In the first embodiment, as the processing in step 102, an example of a process for deriving the swing amount of the building body 16 from the building body swing amount deriving table 42 is given. However, the present invention is not limited to this. If there is a reason why the rigidity of the swing-down 36 can be ignored, for example, the ratio of the thickness (for example, the outer diameter) to the height of the swing-down 36 is very large, the swing amount of the tip of the swing-down 36 can be set as the building body. You may apply as 16 rocking | fluctuation amounts.

  In the next step 104, the amount of rocking of the building body 16 derived by the processing in step 102 is stored in a predetermined storage area α (a predetermined area of the secondary storage unit 34D as an example) in chronological order, The process proceeds to step 106. FIG. 6 schematically shows an example of the storage area α in which the swing amount of the building body 16 is stored. In the example shown in FIG. 6, an example in which the swing amount of the building body 16 is stored for each current time (here, for each execution time of the process of step 104 as an example) is shown.

  In step 106, whether or not the number of swinging amounts of the building body 16 (the number of derivation results) stored in the storage area α by the processing in step 104 has exceeded a predetermined threshold (“30” as an example). If the determination is negative, the process returns to step 102. If the determination is affirmative, the process proceeds to step 108.

  In step 108, the maximum swing amount (as an example, the maximum amplitude) of the building body 16 is estimated based on the swing amount of the building body 16 currently stored in the storage area α. In this step 108, for example, the peak-to-peak value of the swing amount is extracted from the swing amount of the building body 16 currently stored in the storage area α, and the maximum swing amount is calculated from the extracted peak-to-peak value. Estimated by As another method, a profile of a plurality of patterns previously determined as a profile of change over time of the swing amount of the building body 16 and the structure body 16 uniquely determined for each of these profiles are used. By deriving the maximum swing amount corresponding to the profile created by the swing amount of the building body 16 currently stored in the storage area α from the table configured to be associated with the maximum swing amount. A method of estimating the maximum swing amount of the main body 16 can be exemplified. Alternatively, the swing speed may be calculated from the swing amount of the building body 16 stored in the storage area α at each time, and the maximum swing amount of the building body 16 may be estimated from the calculated swing speed. In the first embodiment, the maximum amplitude is estimated as the maximum swing amount. However, the present invention is not limited to this. From a specific position of the building 10 (for example, a stationary position in the initial state of the building body 16). May be the maximum swing amount. Moreover, not only the maximum swing amount but also the average swing amount of the building body 16 stored in the storage area α may be used. Further, it is not necessary to limit the estimation of the swing amount, and it is also possible to estimate at least one of the swing amount, the swing speed, and the swing acceleration.

  In step 110, the maximum swing amount estimated by the processing in step 108 is stored in association with the current time in a predetermined storage area β of the secondary storage unit 34D and displayed on the display 34F together with the current time. Thereafter, the swing feature estimation processing program ends. In the above-described step 110, the processing for storing and displaying the maximum swing amount is exemplified. However, the present invention is not limited to this, and a warning is displayed when the maximum swing amount exceeds a predetermined swing amount (visible display). , Permanent visible display and audible display), or these processes may be selectively executed. Which process is to be selected may be selected by the user via the operation unit 34E.

  As described above in detail, according to the swing feature estimation device 30 according to the first embodiment, the magnetic field provided in the building body 16 supported by the seismic isolation device 18 installed in the foundation 14. Measurement of the permanent magnet 36B, which is an example of a magnetic field generator that generates a magnetic field, a magnetic sensor 38A, which is an example of a measuring means provided on the base 14 and that measures the strength of the magnetic field generated by the permanent magnet 36B, and the magnetic sensor 38A. CPU 34A which is an example of deriving means for deriving rocking feature information indicating the rocking characteristics of the building 10 based on the result (the rocking amount of the building main body 16 as an example). The characteristics of the 16 swings can be estimated easily and with high accuracy.

  Further, according to the swing feature estimation apparatus 30 according to the first embodiment, information specifying the swing range of the tip of the swing-down 36 (the tip of the permanent magnet 38A as an example) as swing feature information ( As an example, since information corresponding to the swing amount of the tip of the swing-down 36 (as an example, the swing amount of the building body 16) is employed, the swing range of the building body 16 can be easily grasped with high accuracy. Can do.

  In addition, according to the swing feature estimation device 30 according to the first embodiment, the permanent magnet 36B and the iron bar 36A that is an example of a support that supports the permanent magnet 36B so as to be close to the magnetic sensor 38A; Therefore, the strength of the magnetic field can be measured easily and accurately as compared with the case where the swing-down 36 is not provided.

  In addition, since the tip of the swing-down 36 is tapered, the strength of the magnetic field can be measured more easily and accurately.

  In the first embodiment, the example of calculating the swing amount of the tip of the swing-down 36 using Bio-Savart's law has been described. However, the present invention is not limited to this. For example, FIG. As shown, the swing-down swing amount derivation table 44 may be stored in the ROM 34C in advance, and the swing amount of the tip of the swing-down 36 may be derived using the swing-down swing amount derivation table 44. As an example, as shown in FIG. 7, the swing-down swing amount derivation table 44 includes a difference in signal level between the voltage signals output from the magnetic sensor 38 at intervals of a predetermined time and the tip of the swing-down 36. Are associated with each other. When the swing amount of the building body 16 is estimated using the swing swing amount derivation table 44 configured in this way, in step 102, the signal level of the voltage signal acquired last time and the signal level of the voltage signal acquired this time are obtained. Difference (signal level difference) is calculated, the swing amount of the tip of the swing-down 36 corresponding to this signal level difference is derived from the swing-down swing amount deriving table 44, and the derived swing amount of the tip of the swing-down 36 is calculated. Based on this, the swing amount of the building body 16 is estimated. Note that as the swing amount of the tip of the swing-down 36 used in the swing-down swing amount derivation table 44, a value obtained in advance by computer simulation or experiment performed repeatedly under various conditions may be used.

  In the first embodiment, the swing amount of the building body 16 is derived from the structure body swing amount derivation table 42. However, the present invention is not limited to this. A result obtained by multiplying the swing amount by a predetermined correction coefficient or a solution obtained using a predetermined arithmetic expression may be used as the swing amount of the building body 16.

  Further, in the first embodiment described above, an example in which the amount of rocking of the tip of the swing-down 36 is estimated every predetermined time using Bio-Savart's law has been described. For example, the time at which the magnetic field strength corresponding to the magnetic field strength measured by the magnetic sensor 38A in the initial state is measured by the magnetic sensor 38A is accumulated in the secondary storage unit 34D, and is swung down from the time interval of the accumulated time. The amount of rocking of the tip of 36 may be estimated. The time at which the magnetic field strength corresponding to the predetermined magnetic field strength is measured by the magnetic sensor 38A is accumulated in the secondary storage unit 34D, and the swing amount of the tip of the swing-down 36 is calculated from the accumulated time interval. Can also be estimated.

  In the first embodiment, a process for determining whether or not the number of derivation results exceeds the threshold is applied as the process in step 106. However, the present invention is not limited to this. For example, the process in step 102 is performed. A process for determining whether or not a predetermined time has elapsed since the start of the first execution may be applied, and the processes of steps 102 and 104 may be repeatedly executed until a predetermined condition is satisfied.

  [Second Embodiment]

  In the first embodiment described above, an example of the case of estimating the swing characteristics of a building using a single measurement transmitter 38 has been described. However, in the second embodiment, a plurality of measurements are performed. The case where the characteristic of the rocking | swiveling of the building 10 is estimated using a transmission apparatus is demonstrated. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 8 is a schematic configuration diagram illustrating an example of a configuration of the measurement transmission unit 62 included in the swing characteristic estimation device 60 according to the second embodiment. As shown in FIG. 8, the rocking feature estimation apparatus 60 according to the second embodiment is measured in place of the measurement unit 32 as compared with the rocking feature estimation apparatus 30 shown in the first embodiment. The point which applied the part 62 differs. The measurement unit 62 is different from the measurement unit 32 described in the first embodiment in that a measurement transmission device group 64 is applied instead of the measurement transmission device 38. As shown in FIG. 9 as an example, the measurement transmission device group 64 includes measurement transmission devices 64A to 64G, each of which is the measurement transmission device 38 described in the first embodiment. It is configured in the same way. On the base 14, the measurement transmission device 64A is placed at the same position as the measurement transmission device 38 described in the first embodiment, and each of the measurement transmission devices 64B to 64G is centered on the measurement transmission device 64A. Is placed so as to overlap each vertex of a regular hexagon drawn virtually.

  Next, as an operation of the swing feature estimation apparatus 60 according to the second embodiment, referring to FIG. 10, the swing at the time of executing the swing feature estimation process according to the second embodiment. The operation of the feature estimation device 60 will be described. Note that FIG. 10 is executed by the CPU 34A of the estimation unit 34 when an instruction to execute the swing feature estimation process according to the second embodiment is performed via the operation unit 34E of the estimation unit 34. It is a flowchart which shows an example of the flow of a process of the rocking | fluctuation feature estimation process program performed, and this program is stored beforehand by the predetermined area | region of secondary storage part 34D.

  In step 200 in FIG. 10, the process waits until each voltage signal transmitted from each of the measurement transmission apparatuses 64A to 64G is received (acquired). If each voltage signal is acquired in step 200, an affirmative determination is made and the routine proceeds to step 202. In step 202, it is determined whether or not the strength of the magnetic field measured by any of the magnetic sensors 38A included in each of the measurement transmitters 64A to 64G has changed from the strength of the magnetic field measured in the initial state. If the determination is negative, the swing feature estimation processing program is terminated, whereas if the determination is affirmative, the process proceeds to step 204.

  In step 204, the intensity of the magnetic field uniquely determined from the signal level of the voltage signal for each magnetic sensor 38A acquired in the process of step 200 and the value of the current flowing through the magnetic sensor 38A when measuring the strength of the magnetic field are detected. By solving the inverse problem using the above rule, the swing position of the tip of the swing-down 36 is estimated using the two-dimensional coordinates with the reference position as the origin, and the routine proceeds to step 206. Specifically, the two-dimensional coordinates with the reference position as the origin are set on a horizontal plane with the position of the tip of the swing-down 36 located on the center point of the measurement transmitter 64A as the origin, as shown in FIG. Says two-dimensional coordinates. Therefore, the swing position of the tip of the swing-down 36 is a two-dimensional coordinate plane with the horizontal plane including the tip of the swing-down 36 in the initial state as the origin and the position of the tip of the swing-down 36 in the initial state as the origin. In this case, the point P shown in FIG. 11 can be represented by two-dimensional coordinates that specify the position when projected onto the two-dimensional coordinate plane.

  In step 206, the rocking position estimated by the process of step 202 is stored in a predetermined storage area α (a predetermined area of the secondary storage unit 34D as an example) in chronological order, and then the process proceeds to step 208. FIG. 12 schematically shows an example of the storage area α in which the swing position is stored. As shown in FIG. 12, the two-dimensional coordinates for specifying the swing position are stored at each time when the swing position is estimated (here, as an example, at each execution time of step 204). In the example shown in FIG. 12, a case where two-dimensional coordinates specifying the swing position are stored at intervals of 0.1 seconds is shown.

  In step 208, it is determined whether or not the number of swing positions (the number of estimation results) stored in the storage area α by the process in step 206 has exceeded a predetermined threshold (“1000” as an example), If a negative determination is made, the process returns to step 202, whereas if an affirmative determination is made, the process proceeds to step 210.

  In step 210, the amount of rocking of the building body 16 within a predetermined period is estimated based on the rocking position currently stored in the storage area α. In this step 210, for example, the distance from the initially estimated swing position to the estimated swing position after a predetermined time (1.5 seconds) is calculated, and a predetermined correction is made on the result obtained by the calculation. A value obtained by multiplying the coefficient is employed as the swing amount of the building body 16 within a predetermined period. The correction coefficient referred to here is a coefficient for correcting the swing amount of the tip of the swing-down 36 to the swing amount of the building body 16. The reason for multiplying the correction coefficient is that the swing amount of the tip of the swing-down 36 does not necessarily correspond to the swing amount of the building main body 16, so that the swing-down 36 swings with the swing of the building main body 16. This is because it is necessary to remove an element related to the deflection of the swing-down 36 that occurs at the time. However, if there is a reason that the deflection based on the rigidity of the swing-down 36 is negligible, for example, the ratio of the thickness to the height of the swing-down 36 is very large, the swing amount of the tip of the swing-down 36 is set to the building main body 16. The swing amount may be used as it is. In the second embodiment, an example is given in which the swing amount of the building body 16 within the predetermined period is estimated in step 210. However, the present invention is not limited to this example, and the predetermined amount is within the predetermined period. The speed and acceleration of the building body 16 may be estimated as information indicating the characteristics of the rocking of the building 10.

  In the next step 212, between the rocking positions of the building body 16 derived from the rocking positions stored in the storage area α by the processing in step 206 (every predetermined time (here, every 0.1 second as an example)). ), The trajectory following the swing path of the building body 16 is created, the created trajectory is displayed on the display 34F, and the amount of swing estimated by the process of step 210 is Whether or not the swing amount of the swing section is specified is displayed. FIG. 13 shows an example in which a trajectory related to the swinging of the building body 16 is displayed on the display 34F. In the example shown in FIG. 13, it is shown that the swinging amount of the building body 16 estimated in the process of step 210 is 10 cm. Although not shown in FIG. 13, the corresponding trajectory in which the rocking amount of the building body 16 is displayed as 10 cm may be displayed in a form different from other trajectories. Examples of “display in a form different from other trajectories” mentioned here include displaying line types different from other trajectories, displaying colors different from other trajectories, and the like. In addition, the display mode (for example, line type or color) of the trajectory may be changed at predetermined time intervals, or other trajectories may be deleted while leaving only the trajectory of the predetermined swing section. Good or vice versa.

  In the process of step 212, the two-dimensional coordinates for specifying the swing position of the building body 16 are the distances between adjacent swing positions stored in the storage area α (every predetermined time (here, one example). Is calculated by multiplying the oscillation interval) by 0.1 second) as described above, for example, the ratio of the thickness of the swing-down 36 to the height of the swing-down 36 is very large. If there is a reason that the deflection of the swing-down 36 based on the rigidity can be ignored, the swing amount of the tip of the swing-down 36 may be used as it is as the swing amount of the building body 16.

  As explained in detail above, according to the swing feature estimation device 60 according to the second embodiment, the magnetic field provided in the building body 16 supported by the seismic isolation device 18 installed in the foundation 14. A permanent magnet 36B, which is an example of a magnetic field generator that generates a magnetic field, and a plurality of magnetic sensors 38A, each of which is an example of a plurality of measuring means provided on the base 14 for measuring the strength of the magnetic field generated by the permanent magnet 36B, Oscillation feature information (one example) indicating the oscillation characteristics of the building 10 based on the measurement results of each of the plurality of magnetic sensors 38A (for example, voltage signals corresponding to the strength of the magnetic field measured by each magnetic sensor 38A). The CPU 34A, which is an example of a derivation means for deriving the oscillating position as the derivation means, can be estimated easily and with high accuracy.

  Further, as swing characteristic information, information corresponding to information (two-dimensional coordinates specifying the swing position of the tip of the swing-down 36 as an example) specifying the position of the tip of the swing-down 36 (for example, the tip of the swing-down 36). The two-dimensional coordinates obtained by multiplying the distance between the swing positions by the correction coefficient are employed, so that the swing path of the building body 16 can be easily grasped with high accuracy.

  In the second embodiment, the swing position of the tip of the swing-down 36 is derived from each measurement result of the magnetic sensor 38A included in each of the measurement transmitters 64A to 64G using Bio-Savart's law. However, the present invention is not limited to this. For example, the combination of the signal level of the voltage signal output from each of the magnetic sensors 38A included in each of the measurement transmitters 64A to 64G and the two-dimensional coordinates Is prepared in advance (for example, stored in advance in the ROM 34C), and the swing position of the tip of the swing-down 36 is determined using this swing position derivation table. It may be derived. Note that as the swing amount of the tip of the swing-down 36 used in the swing position deriving table, a value obtained in advance by computer simulation or experiment performed repeatedly under various conditions may be used.

  In the second embodiment described above, an example in which two-dimensional coordinates specifying the swing position of the tip of the swing-down 36 is derived using the measurement transmitters 64A to 64G has been described. Needless to say, by increasing the number of transmitters installed, two-dimensional coordinates specifying the swing position can be derived in detail. On the other hand, if the number of measurement transmitters is reduced, the amount of calculation is reduced by that amount, so that it is possible to reduce the load on the calculation (for example, the load on the CPU 34A).

  In the second embodiment, the process of determining whether or not the number of estimation results exceeds the threshold is applied as the process of step 208. However, the present invention is not limited to this. For example, the process of step 202 is performed. A process for determining whether or not a predetermined time has elapsed since the start of the execution of the first time may be applied, and if the processes of steps 202, 204 and 206 are repeatedly executed until a predetermined condition is satisfied. good.

  Further, in each of the above-described embodiments, the embodiment has been described in the case where the characteristics of the horizontal swing of the building body 16 are estimated. However, the present invention is not limited to this. For example, as shown in FIG. The base end of the swing-down 36 is fixed to the wall surface of the vertical wall 10 </ b> A included in 16, and the vertical wall on the distal end side of the swing-down 36 (a vertical wall facing the vertical wall 10 </ b> A and constituting a part of the foundation 14. The measurement transmitter group 64 may be provided on the vertical wall 10B. In this case, the relative positional relationship between the swing-down 36 and the measurement transmission device group 64 may be the positional relationship described in the second embodiment. This makes it possible to estimate the characteristics of the vertical shaking (vertical swing) of the building 10. However, when the base end of the rod-like swing-down 36 is fixed to the vertical wall 10A as shown in FIG. It is preferable to shorten the length (increase the ratio of the thickness to the height of the swing-down 36), and place the measurement transmitter group 64 on the base to shorten the distance from the tip of the swing-down 36.

  In each of the above embodiments, the swing characteristics of the building 10 are derived from the swing characteristics of the swing-down 36 every predetermined time. However, only the information related to the swing characteristics of the tip of the swing-down 36 is obtained. The characteristics of the swinging of the building body 16 may be derived in advance and collectively afterward.

  Further, in each of the above-described embodiments, the swing characteristic of the building body 16 is estimated based on the strength of the magnetic field at the tip of the swing-down 36. An estimation method can be considered. For example, instead of the swing-down 36, the base end of a rod provided with a light emitter at the front end is fixed to a housing included in the building body 16, and a plurality of photosensors for detecting light emitted from the light emitter are provided. The distance from the rod is set to the side and scattered on the same plane (for example, the upper surface of the foundation 14) at predetermined intervals. The method of estimating is mentioned. Also, a method may be considered in which a single photosensor is used, the time when light is detected by this photosensor is accumulated, and the magnitude of the rod swing is estimated from the time interval of the accumulated time.

  Further, in each of the above embodiments, the description has been given by taking the form example in the case of using the permanent magnet 36B. However, the present invention is not limited to this, and an electromagnet may be used. There may be. Any magnetic field generator that generates a magnetic field in this way can be applied.

  In each of the above embodiments, as the “predetermined process” shown in steps 110 and 212, a process of displaying swing feature information indicating the swing characteristics of the building body 16 on the display 34F is executed. However, instead of displaying it on the display 34F, it may be stored in the secondary storage unit 34D, for example, or a process of transmitting to a specific communication device may be applied.

  In each of the above embodiments, the swing-down 36 is fixed to the building body 16 and the magnetic sensor 38A is fixed to the foundation 14 so as to face the swing-down 36. However, these may be arranged in reverse. That is, the magnetic sensor 38 </ b> A is disposed on the building body 16 and the swing-down 36 is disposed on the foundation 14. However, in this case, it is necessary to arrange the swing-down 36 so that the tip (permanent magnet 35B) faces the magnetic sensor 38A (at a position where the magnetic field strength of the permanent magnet 35B can be measured).

  Moreover, in each said embodiment, although the full length of the iron bar 36A contained in the swing-down 36 was made into the fixed value, you may comprise so that expansion-contraction is possible. In this case, a telescopic iron rod configured to include an outer cylinder and an inner cylinder that is slidably used in the outer cylinder can be exemplified. Thereby, it is possible to adjust the total length of the swing-down according to the distance between the lower surface of the building body 16 and the upper surface of the foundation 14.

10 Building 16 Building Body 18 Seismic Isolation Device 34A CPU
36 Swing down 36A Iron bar 36B Permanent magnet 38A Magnetic sensor

Claims (5)

A building body supported by a seismic isolation device installed on the foundation and a magnetic field generator for generating a magnetic field provided on one of the foundations;
A measuring means provided on the other of the building main body and the foundation and measuring the strength of the magnetic field generated by the magnetic field generator;
Deriving means for deriving rocking feature information indicating the rocking characteristics of the building body based on the measurement result of the measuring means;
A swing feature estimation apparatus including:   The swing feature estimation apparatus according to claim 1, wherein the swing feature information is information corresponding to information specifying a swing range of the magnetic field generator. A building body supported by a seismic isolation device installed on the foundation and a magnetic field generator for generating a magnetic field provided on one of the foundations;
A plurality of measuring means each provided for the other of the building body and the foundation and measuring the strength of the magnetic field generated by the magnetic field generator;
Deriving means for deriving rocking feature information indicating the rocking characteristics of the building body based on the measurement results of each of the plurality of measuring means;
A swing feature estimation apparatus including:   The rocking | fluctuation characteristic estimation apparatus of Claim 3 which made the said rocking | fluctuation characteristic information the information corresponding to the information which specifies the position of the said magnetic field generator.   5. The apparatus according to claim 1, further comprising a swing-down unit configured to include the magnetic field generator and a support that supports the magnetic field generator so as to be close to the measurement unit. Oscillation feature estimation device.