Measuring system and measuring method for floor acceleration

Abstract

To determine the floor acceleration of the floor of a story where an acceleration sensor is not installed.SOLUTION: A measuring system for floor acceleration obtains relative acceleration Δai by multiplying angular acceleration αi obtained by differentiating the angular velocity ωi of the floor of a non-reference story Fi measured by a gyro sensor by story height Hi. The measuring system further obtains the floor acceleration aT of a target story TF on the basis of the reference floor acceleration a0 of a reference story SF and the integrated value of the relative acceleration Δai from the target story TF from a story adjacent to the reference story SF.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a system and method for measuring floor acceleration of a building. [Background technology]

[0002] The useful life of buildings and other structures is determined by law. However, the actual lifespan of a structure (actual lifespan) is affected by various factors, such as its structure, materials, and the type and frequency of maintenance.

[0003] One factor that may affect the actual lifespan of a building is the impact of external forces, such as those caused by earthquakes. For example, when an earthquake occurs, external forces are applied to the building's framework, potentially deforming the structural components, such as columns, beams, and the bolts connecting them. If the earthquake is not particularly large and the external forces acting on the framework are not significant, once the shaking subsides and the external forces cease to act on the framework, the structural components elastically return to their original state. However, even if the external forces acting on the framework are not significant and have little impact on the structural components macroscopically, microscopically, some of the metal atoms that make up the structural components may not be able to return to their original positions (resulting in a dislocation phenomenon). Therefore, even if the external forces acting on the framework are not significant, repeated earthquakes, even if they are not particularly large, can cause microcracks in the structural components. Once a crack has appeared in a building material, if external forces are repeatedly applied to the structure, the crack will gradually grow larger.

[0004] In this way, in buildings constructed in areas where earthquakes occur repeatedly, damage (fatigue) accumulates in the metals that make up the building materials as the earthquakes occur repeatedly, and the strength of the building materials gradually decreases. Therefore, it is possible to measure the amount of deformation (elastic deformation) of building materials due to external forces applied during earthquakes and other events using sensors, and based on the results, estimate the impact of external forces on the building.

[0005] JP 2021-143546 A describes a building history information storage system that attaches gyro sensors to the uprights that make up a curtain wall, calculates the inclination angle of the uprights or the inter-story displacement or inter-story deformation angle of the curtain wall from the output signal of the gyro sensors, estimates the impact of external forces acting on the building in the event of an earthquake or the like based on the calculation results, and stores the estimated results in a storage device. The system described in JP 2021-143546 A makes it possible to accurately determine the impact of external forces on a building, making it easier to determine appropriate maintenance times, and provides data-backed appropriate values ​​for remaining lifespan, ensuring a usage period that is not affected by the statutory useful life, thereby enabling a good understanding of the asset value of the building and efficient operation of the building. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-143546 [Non-patent literature]

[0007] [Non-Patent Document 1] Yuichi Yamanaka, Nao Ishihara, Satoshi Yamada, Masajiro Motoyui, Tsuyoshi Seike, and Yoshio Wakiyama, "Numerical Analysis Study on Proposed Floor Acceleration Formula for Seismic Design of Nonstructural Members," Architectural Institute of Japan Technical Report Vol. 24, No. 57, pp. 547-552, June 2018. Summary of the Invention [Problem to be solved by the invention]

[0008] The system described in Patent Publication No. 2021-143546 calculates the inclination angle of the uprights, or the inter-story displacement or inter-story deformation angle from the output signal of the gyro sensor, and based on the calculation results, estimates the effect that external forces due to earthquakes, etc., have on the structural components of the building.

[0009] On the other hand, it is known that the impact of external forces due to earthquakes, etc. on secondary components such as ceiling materials and equipment installed within a building can be evaluated based on floor acceleration (floor response acceleration) (see "Numerical analytical study on a proposed formula for floor acceleration in the seismic design of non-structural components").

[0010] The floor acceleration can be determined, for example, by an acceleration sensor installed on the floor of each floor. However, installing an acceleration sensor to evaluate the impact on non-structural members such as secondary members and equipment in addition to a gyro sensor used to evaluate the impact on structural members can lead to problems such as an increase in the number of sensors and complicated wiring work, resulting in higher costs.

[0011] In view of the above circumstances, the present disclosure aims to realize a floor acceleration measurement system and method that can determine the floor acceleration of a floor on which no acceleration sensor is installed. [Means for solving the problem]

[0012] A floor acceleration measurement system of a first aspect of the present disclosure is a system that measures floor acceleration in a first horizontal direction of a target floor, which is one of multiple floors of a building, and includes an acceleration sensor, a gyro sensor, and a calculator.

[0013] The acceleration sensor measures a reference floor acceleration, which is a floor acceleration in the first direction, of a reference floor, which is one floor other than the target floor among the plurality of floors.

[0014] The gyro sensor measures the angular velocity of a floor of a non-reference floor, which is at least one floor among the plurality of floors including the target floor, around an axis extending in a second direction in the horizontal direction that is perpendicular to the first direction.

[0015] The computing unit has an angular acceleration calculation function, a relative acceleration calculation function, and a floor acceleration calculation function.

[0016] The angular acceleration calculation function calculates the angular acceleration of the floor of the non-reference floor about the axis extending in the second direction by differentiating the angular velocity about the axis extending in the second direction with respect to time.

[0017] The relative acceleration calculation function calculates the relative acceleration of the floor of the non-reference floor in the first direction relative to a floor adjacent to the non-reference floor by multiplying the angular acceleration around an axis extending in the second direction by the floor height.

[0018] The floor acceleration calculation function calculates the floor acceleration of the target floor based on the reference floor acceleration and the integrated value of the relative acceleration in the first direction of floors from the target floor to a floor adjacent to the reference floor among the plurality of floors.

[0019] In a floor acceleration measurement system according to a second aspect of the present disclosure, in the floor acceleration measurement system according to the first aspect of the present disclosure, the reference floor is a rooftop floor or a ground floor.

[0020] In a floor acceleration measurement system according to a third aspect of the present disclosure, in the floor acceleration measurement system according to the first or second aspect of the present disclosure, the gyro sensor is attached to a curtain wall that constitutes an outer wall of the building.

[0021] In a floor acceleration measurement system according to a fourth aspect of the present disclosure, in the floor acceleration measurement system according to the third aspect of the present disclosure, the gyro sensor is attached to a mullion that constitutes the curtain wall.

[0022] In the floor acceleration measurement system of the fifth aspect of the present disclosure, in the floor acceleration measurement system of the third or fourth aspect of the present disclosure, the calculator has the function of calculating the inter-story displacement or inter-story deformation angle of the curtain wall based on the angular velocity around the axis extending in the second direction.

[0023] In a floor acceleration measurement system of a sixth aspect of the present disclosure, in the floor acceleration measurement system of the fourth aspect of the present disclosure, the calculator has a function of calculating the inclination angle of the upright based on the angular velocity.

[0024] A seventh aspect of the floor acceleration measurement method of the present disclosure is a method for measuring floor acceleration in a first horizontal direction of a target floor, which is one of multiple floors of a building, and includes a reference floor acceleration measurement process, an angular velocity measurement process, an angular acceleration calculation process, a relative acceleration calculation process, and a floor acceleration calculation process.

[0025] The reference floor acceleration measuring step measures, by an acceleration sensor, a reference floor acceleration, which is a floor acceleration in the first direction, of a reference floor, which is one floor other than the target floor among the plurality of floors.

[0026] The angular velocity measurement process uses a gyro sensor to measure the angular velocity of a floor of a non-reference floor, which is at least one floor among the plurality of floors including the target floor, around an axis extending in a second direction perpendicular to the first direction in the horizontal direction.

[0027] The angular acceleration calculation step calculates the angular acceleration of the floor of the non-reference floor about the axis extending in the second direction by differentiating the angular velocity about the axis extending in the second direction with respect to time.

[0028] The relative acceleration calculation step calculates the relative acceleration of the floor of the non-reference floor about an axis in the first direction with respect to a floor adjacent to the non-reference floor by multiplying the angular acceleration about an axis extending in the second direction by the floor height.

[0029] The floor acceleration calculation process calculates the floor acceleration of the target floor based on the reference floor acceleration and the integrated value of the relative acceleration around the axis in the first direction of floors from the target floor to a floor adjacent to the reference floor among the plurality of floors. [Effects of the Invention]

[0030] According to the floor acceleration measurement system and measurement method of one aspect of the present disclosure, it is possible to determine the floor acceleration of a floor on which no acceleration sensor is installed. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 1 is a perspective view schematically illustrating a building that is the target of a floor acceleration measuring method according to a first example of an embodiment of the present disclosure. [Figure 2] FIG. 2 is an enlarged view of a portion of the building shown in FIG. [Figure 3] FIG. 3 is a flowchart showing the procedure for determining the floor acceleration. DETAILED DESCRIPTION OF THE INVENTION

[0032] [Example 1] A first example of an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3. FIG.

[0033] In this example, the floor acceleration measurement system and measurement method according to one embodiment of the present disclosure are used to measure the floor acceleration (floor response acceleration) a of a target floor TF, which is one of the floors of a multi-story building 1 having a skeleton (not shown) and a plurality of curtain walls 2 installed on the skeleton so as to close openings of the skeleton. T This is an example of finding the

[0034] In particular, in the floor acceleration measurement system and measurement method of this example, as in the system described in JP 2021-143546 A, in order to estimate the influence of external forces acting on the building 1 in the event of an earthquake or the like, a gyro sensor attached to the curtain wall 2 is used, and the floor acceleration a of the target floor TF is measured without installing an acceleration sensor on the floor of the target floor TF. T Ask for.

[0035] As shown in Figure 2, each curtain wall 2 comprises a plurality of vertically arranged mullions 3, a plurality of horizontally arranged stringers 4 between adjacent left and right mullions 3, and a panel 5 attached to an opening surrounded on all four sides by the mullions 3 and the stringers 4, and forms the exterior wall of the building 1.

[0036] The floor acceleration measuring system of this example includes an acceleration sensor 6, a gyro sensor 7, and a computing unit 8.

[0037] The acceleration sensor 6 measures a reference floor acceleration a0, which is the floor acceleration of a reference floor SF, which is one floor other than the target floor TF, among the multiple floors of the building 1.

[0038] The acceleration sensor 6 is capable of detecting acceleration in at least two horizontal directions (the X-axis direction and the Y-axis direction in FIG. 1). In this example, the acceleration sensor 6 detects acceleration (a 0X , a 0Y , a 0Z Specifically, although not limited to these, the acceleration sensor 6 may be a piezoelectric type, a piezo-resistive type, or a capacitance type acceleration sensor.

[0039] In this example, the reference floor SF is the rooftop floor. That is, in this example, the acceleration sensor 6 detects the floor acceleration of the rooftop floor.

[0040] In this example, the acceleration sensor 6 is provided only on the rooftop floor, which is the reference floor SF.

[0041] However, the reference floor SF can also be the ground floor or an intermediate floor other than the target floor TF. In this case, the acceleration sensor is attached to the floor structure or floor material of the reference floor SF. Also, acceleration sensors are attached to multiple floors, and the floor acceleration a of the target floor TF is calculated based on the measurement value of the acceleration sensor attached to the floor close to the target floor TF. T In any case, no acceleration sensor is installed on the target floor TF.

[0042] In this example, the acceleration sensor 6 is attached to the roof material or roof structure.

[0043] When implementing the present disclosure and installing the acceleration sensor on a floor other than the rooftop, the acceleration sensor can be attached to the floor surface or floor structure, but the acceleration sensor can also be attached to the fasteners used to attach the curtain wall to the building frame.

[0044] The gyro sensor 7 detects a non-reference floor F, which is at least one floor including the target floor TF, among the plurality of floors. i (i is the difference in floor number from the target floor TF) i Detect.

[0045] The gyro sensor 7 is capable of detecting angular velocities around at least two axes in the horizontal direction (around the X-axis and the Y-axis in FIG. 1). In this example, the gyro sensor 7 detects angular velocities (ω iX , ω iY , ω iZ Specifically, although not limited to this, a vibration type gyro sensor that detects angular velocity by utilizing Coriolis force can be used as the gyro sensor 7.

[0046] The floor acceleration measurement system of this example is equipped with a plurality of gyro sensors 7. This allows the floor acceleration of all the remaining floors (non-reference floors) F except for the reference floor SF to be measured. i The angular velocity of the floor is ω i However, a gyro sensor that detects the angular velocity of the floor of the reference floor SF may be provided.

[0047] In this example, the gyro sensor 7 is attached to the mullions 3 of the curtain wall 2. Specifically, the gyro sensor 7 is attached to the mullions 3 at a height position on the non-reference floor F i It is attached to the side of the part that coincides with the height position of the floor surface.

[0048] However, the gyro sensor can also be mounted on the curtain wall or panel.

[0049] The method for attaching the gyro sensor 7 is not particularly limited, and it can be fixed by, for example, screwing, welding, adhesive, etc. Furthermore, the gyro sensor 7 may be attached either on the outdoor side or the indoor side.

[0050] The calculator 8 calculates the reference floor acceleration a0 measured by the acceleration sensor 6 and the angular velocity ω measured by the gyro sensor 7. i Based on this, the floor acceleration a of the target floor TF T Specifically, the calculator 8 calculates the floor acceleration a of the target floor TF for each of the two horizontal directions (X-axis direction and Y-axis direction). T (a TX , a TY ) is calculated.

[0051] For this purpose, the calculator 8 has an angular acceleration calculation function, a relative acceleration calculation function, and a floor acceleration calculation function.

[0052] In this example, the calculator 8 also has a measurement noise removal function for removing measurement noise superimposed on the measurement signal of the gyro sensor 7.

[0053] In this example, the measurement noise removal function is configured by a low-pass filter (high-cut filter). That is, the calculator 8 performs filtering processing using a low-pass filter on the measurement signal of the gyro sensor 7 to remove high-frequency measurement noise superimposed on the measurement signal. The cutoff frequency of the low-pass filter can be set to 30 Hz, although it is not limited to this.

[0054] The measurement noise removal function can also be configured by a band-pass filter, or the measurement noise removal function can be omitted.

[0055] The angular acceleration calculation function uses the non-reference floor F measured by the gyro sensor 7. i Angular velocity ω i By differentiating with time, the non-reference floor F i Angular acceleration α i Specifically, in this example, the angular acceleration calculation function calculates the angular velocity ω obtained by performing noise removal processing on the output signal of the gyro sensor 7 using the measurement noise removal function. i By time differentiating the signal representing the non-reference order F i Angular acceleration α iAsk for.

[0056] In this example, the angular acceleration calculation function is used to calculate the angular acceleration of non-reference floors F from the top floor excluding the rooftop floor to the target floor TF. i For each, the angular velocity ω around the X axis iX and angular velocity ω around the Y axis iY By differentiating with respect to time, the angular acceleration around the X axis, α iX and angular acceleration α around the Y axis iY Ask for.

[0057] The relative acceleration calculation function is for non-reference floors F i Angular acceleration α i Based on non-standard floor F i Adjacent to floor F i-1 Non-base floor F i The relative acceleration of the floor Δa i Specifically, the relative acceleration in a second direction, which is orthogonal to the first direction in the horizontal directions, is calculated by multiplying the angular acceleration around an axis extending in a first direction in the horizontal directions by the floor height.

[0058] In this example, as shown in the following equation (1), the angular acceleration α around the Y axis iY Floor height H i By multiplying this, the relative acceleration in the X-axis direction Δa iX Ask for. Δa ix =α iY ×H i ···(1) In addition, as shown in the following equation (2), the angular acceleration α around the X axis iX Floor height H i By multiplying this, the relative acceleration in the Y-axis direction Δa iY Ask for. Δa iY =α iX ×H i ···(2)

[0059] Floor height H i is the floor number for each floor. i The mounting height of the gyro sensor 7 or acceleration sensor 6 mounted on the i In this case, it is expressed by the following equation (3). H i =|h i -h iー1 | (3)

[0060] Here, h0 is the mounting height of the acceleration sensor 6 from the ground. In this example, the gyro sensor 7 is mounted on the upright 3 at a height position on each floor F. i Since it is attached to the side of the part that coincides with the height position of the floor surface, i is floor F i From the surface of the floor to floor F iー1 is the absolute value of the distance to the floor surface.

[0061] The floor acceleration calculation function calculates the reference floor acceleration a0 and the non-reference floor F i Relative acceleration Δa i Based on the integrated value of the floor acceleration a of the target floor TF T Ask for.

[0062] In this example, the reference floor acceleration a in the X-axis direction is expressed as shown in the following equation (4). 0X From the floors adjacent to the standard floor SF, that is, the non-standard floors F from the top floor located directly below the rooftop floor to the target floor TF i The relative acceleration of the floor in the X-axis direction is Δa iX By subtracting the floor acceleration a in the X-axis direction, TX Ask for. a TX =a 0X -(Δa 1X +Δa 2X +···+Δa nX ) ···(4) In addition, as shown in the following equation (5), the reference floor acceleration in the Y-axis direction a 0Y From the floors adjacent to the standard floor SF, that is, the non-standard floors F from the top floor located directly below the rooftop floor to the target floor TF i Relative acceleration Δa in the Y-axis direction iY By subtracting the floor acceleration a in the Y-axis direction, TY Ask for. a TY =a 0Y -(Δa 1Y +Δa 2Y+···+Δa nY ) ···(5)

[0063] That is, the floor acceleration a in the X-axis direction of the target floor TF TX When calculating the floor acceleration a in the Y-axis direction of the target floor TF, the X-axis direction is the first direction and the Y-axis direction is the second direction. TY When calculating the value of the Y-axis direction, the Y-axis direction is the first direction and the X-axis direction is the second direction.

[0064] When implementing the present disclosure and the target floor is a floor lower than the reference floor, the floor acceleration calculation function calculates the floor acceleration of the target floor by subtracting the relative acceleration of the non-reference floor from the floor adjacent to the reference floor to the target floor from the reference floor acceleration.On the other hand, when the target floor is a floor higher than the reference floor, the floor acceleration calculation function calculates the floor acceleration of the target floor by adding the relative acceleration of the non-reference floor from the floor adjacent to the reference floor to the target floor.

[0065] In this example, the computing unit 8 has a differential noise removal function for removing high frequency noise amplified by the differentiation process.

[0066] For example, the differential noise removal function is configured by a low-pass filter (high-cut filter). In this example, the calculator 8 calculates the floor acceleration a calculated by the floor acceleration calculation function. T Then, high-frequency differential noise amplified by the differentiation process is removed by filtering the signal using a low-pass filter.

[0067] The differential noise removal function is based on the angular velocity ω i The angular acceleration α obtained by time differentiation i Or the angular acceleration α i Floor height H i The relative acceleration Δa obtained by multiplying i However, in order to reduce the amount of calculation by the calculator 8, the floor acceleration a T It is preferable to subject the signal to a filtering process.

[0068] When implementing the present disclosure, the differential noise removal function may be configured by a band-pass filter, or the differential noise removal function may be omitted.

[0069] In this example, the calculator 8 calculates the angular velocity ω i It further has the function of calculating the inter-story displacement or inter-story deformation angle of the curtain wall 2 or the inclination angle of the mullions 3 based on the above.

[0070] Specifically, the calculator 8 calculates the inter-story displacement or inter-story deformation angle of the curtain wall 2, or the inclination angle of the mullions 3, by inputting the output signal of the gyro sensor 7 into an analytical model that models the curtain wall 2.

[0071] The means for transmitting the measurement signals of the acceleration sensor 6 and the gyro sensor 7 to the calculator 8 is not particularly limited, and either a wired method or a wireless method may be adopted.

[0072] The location where the computing unit 8 is installed is not particularly limited, and it can be installed in a central control room, for example.

[0073] Next, a method for determining the floor acceleration of the target floor TF using the floor acceleration measurement system of this embodiment will be described.

[0074] First, in S1-1, the acceleration sensor 6 detects the floor acceleration a in the X-axis direction of the rooftop floor, which is the reference floor SF. 0X , and the floor acceleration in the Y-axis direction a 0Y Measure.

[0075] At the same time, in S1-2, the gyro sensor 7 detects the non-reference floors F from the target floor TF to the floors adjacent to the reference floor SF, that is, the top floor located directly below the rooftop floor. i The angular velocity ω of the floor around the X axis iX , and angular acceleration around the Y axis ω iY Measure.

[0076] Next, in S2, the measurement noise elimination function of the calculator 8 is used to eliminate the measurement signal from the gyro sensor 7, i.e., the non-reference floor F i The angular velocity ω of the floor around the X axis iX and the angular velocity around the Y axis ω iY Specifically, we remove the high-frequency measurement noise superimposed on the signal representing each floor F i The angular velocity ω of the floor around the X axis iX The signal representing the angular velocity around the Y axis ω is filtered using a low-pass filter to remove noise. iY The signal representing the signal is filtered using a low-pass filter to remove noise.

[0077] In the next step S3, the angular acceleration calculation function of the calculator 8 calculates the angular acceleration of the non-reference floors F from the target floor TF to the top floor. i The angular acceleration α around the X-axis of the floor iX and the angular acceleration α around the Y-axis of the floor iY Specifically, for non-standard floor F i For each, the angular velocity ω of the floor around the X axis iX By differentiating with respect to time, the angular acceleration α around the X-axis of the floor is iX and calculate the angular velocity ω around the Y axis of the floor. iY By differentiating with respect to time, the angular acceleration α iY Ask for.

[0078] Next, in S4, the relative acceleration calculation function of the calculator 8 calculates the relative acceleration of the non-reference floors F from the target floor TF to the top floor. i The relative acceleration of the floor in the X-axis direction Δa iX and the relative acceleration of the floor in the Y-axis direction Δa iY Specifically, for non-standard floor F i For each rotation, the angular acceleration α around the Y axis iY Floor height H i By multiplying this, the relative acceleration in the X-axis direction Δa iX and angular acceleration α around the X axis iX Floor height H i By multiplying this, the relative acceleration in the Y-axis direction Δa iY Ask for.

[0079] Next, in S5, the floor acceleration calculation function of the calculator 8 calculates the floor acceleration a in the X-axis direction of the target floor TF. TX and floor acceleration in the Y-axis direction a TY Specifically, the reference floor acceleration a in the X-axis direction obtained in S1 is calculated. 0X , and the non-reference floors F from the target floor TF to the top floor obtained in S4 i The relative acceleration of the floor in the X-axis direction Δa iX By substituting this into the above equation (4), the floor acceleration a in the X-axis direction of the target floor TF is obtained. TX Also, calculate the reference floor acceleration a in the Y-axis direction obtained in S1. 0Y , and the non-reference floors F from the target floor TF to the top floor obtained in S4 i The relative acceleration of the floor in the Y-axis direction Δa iY By substituting this into the above equation (5), the floor acceleration a in the Y-axis direction of the target floor TF is obtained. TY Ask for.

[0080] In S6, the differential noise elimination function of the calculator 8 calculates the floor acceleration a in the X-axis direction. TX and floor acceleration in the Y-axis direction a TY Specifically, the floor acceleration a in the X-axis direction is TX The signal representing the floor acceleration a in the Y-axis direction is filtered using a low-pass filter to remove noise. TY The signal representing the signal is filtered using a low-pass filter to remove noise.

[0081] In this way, the floor acceleration a in the X-axis direction of the target floor TF is calculated. TX and floor acceleration in the Y-axis direction a TY get.

[0082] As described above, according to the floor acceleration measurement system and measurement method of this example, the floor acceleration a of the floor of the target floor TF where the acceleration sensor 6 is not installed is T (a TX , a TY ) can be obtained.

[0083] Specifically, in this example, the floor acceleration a0 (a 0X , a 0Y ) and the non-reference floor F including the target floor TF in order to measure the story drift or story deformation angle of the curtain wall 2 or the inclination angle of the mullion 3. i The angular velocity ω measured by the gyro sensor 7 attached to i Based on this, the floor acceleration a of the target floor TF T (a TX , a TY ) is being sought.

[0084] In short, according to the floor acceleration measurement system and measurement method of this example, the floor acceleration a of the target floor TF T There is no need to install an acceleration sensor on the floor of the target floor TF just to measure this, which reduces the number of sensors and keeps costs down.

[0085] In this example, the gyro sensor 7 is attached to the curtain wall 2. Therefore, the gyro sensor 7 can be attached to the curtain wall 2 in the factory where the curtain wall 2 is manufactured, thereby reducing the number of work steps at the construction site of the building 1. [Explanation of symbols]

[0086] 1. Building 2. Curtain Wall 3 Posts 4. No Eyes 5 Panel 6 Acceleration Sensor 7 Gyro sensor 8 Arithmetic unit

Claims

1. A floor acceleration measurement system that measures floor acceleration in a first horizontal direction of a target floor that is one of a plurality of floors of a building, an acceleration sensor that measures a reference floor acceleration, which is a floor acceleration in the first direction, of a reference floor that is one floor other than the target floor among the plurality of floors; At least one gyro sensor that measures an angular velocity of a non-reference floor, which is at least one floor including the target floor among the plurality of floors, around an axis extending in a second direction perpendicular to the first direction in the horizontal direction; a computing unit having an angular acceleration calculation function that calculates the angular acceleration of the floor of the non-reference floor about the axis extending in the second direction by time differentiating the angular velocity about the axis extending in the second direction, a relative acceleration calculation function that calculates the relative acceleration of the floor of the non-reference floor in the first direction with respect to a floor adjacent to the non-reference floor by multiplying the angular acceleration about the axis extending in the second direction by the floor height, and a floor acceleration calculation function that determines the floor acceleration of the target floor in the first direction based on the reference floor acceleration and an integrated value of the relative accelerations in the first direction of floors from the target floor to a floor adjacent to the reference floor among the plurality of floors; A floor acceleration measurement system comprising:

2. The floor acceleration measurement system according to claim 1 , wherein the reference floor is a rooftop floor or a ground floor.

3. The floor acceleration measuring system according to claim 1 , wherein the gyro sensor is attached to a curtain wall that constitutes an exterior wall of the building.

4. The gyro sensor is attached to a mullion that constitutes the curtain wall. The floor acceleration measurement system according to claim 3 .

5. 5. The floor acceleration measurement system according to claim 3, wherein the calculator has a function of calculating an inter-story displacement or an inter-story deformation angle of the curtain wall based on the angular velocity around an axis extending in the second direction.

6. The floor acceleration measurement system according to claim 4 , wherein the computing unit has a function of calculating an inclination angle of the upright based on the angular velocity around the axis extending in the second direction.

7. A method for measuring floor acceleration, comprising: measuring a floor acceleration in a first horizontal direction of a target floor that is one of a plurality of floors of a building; a reference floor acceleration measuring step of measuring, by an acceleration sensor, a reference floor acceleration in the first direction of a reference floor that is one floor other than the target floor among the plurality of floors; an angular velocity measurement step of measuring, by a gyro sensor, an angular velocity of a floor of a non-reference floor, which is at least one floor including the target floor among the plurality of floors, about an axis extending in a second direction in the horizontal direction that is perpendicular to the first direction; an angular acceleration calculation step of calculating an angular acceleration of the floor of the non-reference floor about the axis extending in the second direction by time-differentiating the angular velocity about the axis extending in the second direction; a relative acceleration calculation step of calculating a relative acceleration in the first direction of the floor of the non-reference floor with respect to a floor adjacent to the non-reference floor by multiplying the angular acceleration around the axis extending in the second direction by a floor height; a floor acceleration calculation step of calculating a floor acceleration in the first direction of the target floor based on the reference floor acceleration and an integrated value of relative accelerations in the first direction of floors from the target floor to a floor adjacent to the reference floor among the plurality of floors; A method for measuring floor acceleration comprising:

Images